feat: add PRESENT and Twofish ciphers (#2157)

src/core/config/Categories.json

@@ -115,6 +115,10 @@
             "RC6 Decrypt",
             "Ascon Encrypt",
             "Ascon Decrypt",
+            "PRESENT Encrypt",
+            "PRESENT Decrypt",
+            "Twofish Encrypt",
+            "Twofish Decrypt",
             "GOST Encrypt",
             "GOST Decrypt",
             "GOST Sign",

src/core/lib/Present.mjs

@@ -0,0 +1,422 @@
+/**
+ * Complete implementation of PRESENT block cipher encryption/decryption with
+ * ECB and CBC block modes.
+ *
+ * PRESENT is an ultra-lightweight block cipher designed for constrained environments.
+ * Standardised in ISO/IEC 29192-2:2019.
+ *
+ * Reference: "PRESENT: An Ultra-Lightweight Block Cipher"
+ * https://link.springer.com/chapter/10.1007/978-3-540-74735-2_31
+ *
+ * @author Medjedtxm
+ * @copyright Crown Copyright 2026
+ * @license Apache-2.0
+ */
+
+import OperationError from "../errors/OperationError.mjs";
+
+/** Number of rounds */
+const NROUNDS = 31;
+
+/** Block size in bytes (64 bits) */
+const BLOCKSIZE = 8;
+
+/** The 4-bit S-box (16 values) */
+const SBOX = [
+    0xC, 0x5, 0x6, 0xB, 0x9, 0x0, 0xA, 0xD,
+    0x3, 0xE, 0xF, 0x8, 0x4, 0x7, 0x1, 0x2
+];
+
+/** Inverse S-box for decryption */
+const SBOX_INV = [
+    0x5, 0xE, 0xF, 0x8, 0xC, 0x1, 0x2, 0xD,
+    0xB, 0x4, 0x6, 0x3, 0x0, 0x7, 0x9, 0xA
+];
+
+/** P-layer permutation table (bit i goes to position P[i]) */
+const PBOX = [
+    0, 16, 32, 48, 1, 17, 33, 49, 2, 18, 34, 50, 3, 19, 35, 51,
+    4, 20, 36, 52, 5, 21, 37, 53, 6, 22, 38, 54, 7, 23, 39, 55,
+    8, 24, 40, 56, 9, 25, 41, 57, 10, 26, 42, 58, 11, 27, 43, 59,
+    12, 28, 44, 60, 13, 29, 45, 61, 14, 30, 46, 62, 15, 31, 47, 63
+];
+
+/** Inverse P-layer permutation for decryption */
+const PBOX_INV = new Array(64);
+for (let i = 0; i < 64; i++) {
+    PBOX_INV[PBOX[i]] = i;
+}
+
+/**
+ * Convert byte array to BigInt (big-endian)
+ * @param {number[]} bytes - Array of bytes
+ * @returns {bigint} - 64-bit value as BigInt
+ */
+function bytesToBigInt(bytes) {
+    let result = 0n;
+    for (let i = 0; i < bytes.length; i++) {
+        result = (result << 8n) | BigInt(bytes[i]);
+    }
+    return result;
+}
+
+/**
+ * Convert BigInt to byte array (big-endian)
+ * @param {bigint} value - BigInt value
+ * @param {number} length - Desired byte array length
+ * @returns {number[]} - Array of bytes
+ */
+function bigIntToBytes(value, length) {
+    const bytes = [];
+    for (let i = length - 1; i >= 0; i--) {
+        bytes[i] = Number(value & 0xFFn);
+        value >>= 8n;
+    }
+    return bytes;
+}
+
+/**
+ * Apply S-box substitution layer to 64-bit state
+ * @param {bigint} state - 64-bit state
+ * @param {number[]} sbox - S-box to use
+ * @returns {bigint} - Substituted state
+ */
+function sBoxLayer(state, sbox) {
+    let result = 0n;
+    for (let i = 0; i < 16; i++) {
+        const nibble = Number((state >> BigInt(i * 4)) & 0xFn);
+        result |= BigInt(sbox[nibble]) << BigInt(i * 4);
+    }
+    return result;
+}
+
+/**
+ * Apply P-layer permutation to 64-bit state
+ * @param {bigint} state - 64-bit state
+ * @param {number[]} pbox - Permutation table to use
+ * @returns {bigint} - Permuted state
+ */
+function pLayer(state, pbox) {
+    let result = 0n;
+    for (let i = 0; i < 64; i++) {
+        if ((state >> BigInt(i)) & 1n) {
+            result |= 1n << BigInt(pbox[i]);
+        }
+    }
+    return result;
+}
+
+/**
+ * Generate round keys for 80-bit key
+ * @param {number[]} key - 10-byte key
+ * @returns {bigint[]} - Array of 32 round keys (64-bit each)
+ */
+function generateRoundKeys80(key) {
+    // Key register is 80 bits
+    let keyReg = bytesToBigInt(key);
+    const roundKeys = [];
+
+    for (let i = 1; i <= NROUNDS + 1; i++) {
+        // Extract round key (leftmost 64 bits)
+        roundKeys.push(keyReg >> 16n);
+
+        // Rotate left by 61 positions
+        keyReg = ((keyReg << 61n) | (keyReg >> 19n)) & ((1n << 80n) - 1n);
+
+        // Apply S-box to leftmost 4 bits
+        const leftNibble = Number(keyReg >> 76n);
+        keyReg = (keyReg & ((1n << 76n) - 1n)) | (BigInt(SBOX[leftNibble]) << 76n);
+
+        // XOR round counter to bits 19-15
+        keyReg ^= BigInt(i) << 15n;
+    }
+
+    return roundKeys;
+}
+
+/**
+ * Generate round keys for 128-bit key
+ * @param {number[]} key - 16-byte key
+ * @returns {bigint[]} - Array of 32 round keys (64-bit each)
+ */
+function generateRoundKeys128(key) {
+    // Key register is 128 bits
+    let keyReg = bytesToBigInt(key);
+    const roundKeys = [];
+
+    for (let i = 1; i <= NROUNDS + 1; i++) {
+        // Extract round key (leftmost 64 bits)
+        roundKeys.push(keyReg >> 64n);
+
+        // Rotate left by 61 positions
+        keyReg = ((keyReg << 61n) | (keyReg >> 67n)) & ((1n << 128n) - 1n);
+
+        // Apply S-box to leftmost 8 bits (two nibbles: bits 127-124 and 123-120)
+        const leftByte = Number((keyReg >> 120n) & 0xFFn);
+        const leftNibble1 = (leftByte >> 4) & 0xF;  // bits 127-124
+        const leftNibble2 = leftByte & 0xF;          // bits 123-120
+        keyReg = (keyReg & ((1n << 120n) - 1n)) |
+                 (BigInt((SBOX[leftNibble1] << 4) | SBOX[leftNibble2]) << 120n);
+
+        // XOR round counter to bits 66-62
+        keyReg ^= BigInt(i) << 62n;
+    }
+
+    return roundKeys;
+}
+
+/**
+ * Encrypt a single 64-bit block
+ * @param {bigint} block - 64-bit plaintext block
+ * @param {bigint[]} roundKeys - Round keys
+ * @returns {bigint} - 64-bit ciphertext block
+ */
+function encryptBlock(block, roundKeys) {
+    let state = block;
+
+    for (let i = 0; i < NROUNDS; i++) {
+        // Add round key
+        state ^= roundKeys[i];
+        // S-box layer
+        state = sBoxLayer(state, SBOX);
+        // P-layer
+        state = pLayer(state, PBOX);
+    }
+
+    // Final round key addition
+    state ^= roundKeys[NROUNDS];
+
+    return state;
+}
+
+/**
+ * Decrypt a single 64-bit block
+ * @param {bigint} block - 64-bit ciphertext block
+ * @param {bigint[]} roundKeys - Round keys
+ * @returns {bigint} - 64-bit plaintext block
+ */
+function decryptBlock(block, roundKeys) {
+    let state = block;
+
+    // Reverse key addition
+    state ^= roundKeys[NROUNDS];
+
+    for (let i = NROUNDS - 1; i >= 0; i--) {
+        // Inverse P-layer
+        state = pLayer(state, PBOX_INV);
+        // Inverse S-box layer
+        state = sBoxLayer(state, SBOX_INV);
+        // Add round key
+        state ^= roundKeys[i];
+    }
+
+    return state;
+}
+
+/**
+ * Apply padding to message
+ * @param {number[]} message - Original message
+ * @param {string} padding - Padding type ("NO", "PKCS5", "ZERO", "RANDOM", "BIT")
+ * @param {number} blockSize - Block size in bytes
+ * @returns {number[]} - Padded message
+ */
+function applyPadding(message, padding, blockSize) {
+    const remainder = message.length % blockSize;
+    let nPadding = remainder === 0 ? 0 : blockSize - remainder;
+
+    // For PKCS5, always add at least one byte (full block if already aligned)
+    if (padding === "PKCS5" && remainder === 0) {
+        nPadding = blockSize;
+    }
+
+    if (nPadding === 0) return [...message];
+
+    const paddedMessage = [...message];
+
+    switch (padding) {
+        case "NO":
+            throw new OperationError(`No padding requested but input is not a ${blockSize}-byte multiple.`);
+
+        case "PKCS5":
+            for (let i = 0; i < nPadding; i++) {
+                paddedMessage.push(nPadding);
+            }
+            break;
+
+        case "ZERO":
+            for (let i = 0; i < nPadding; i++) {
+                paddedMessage.push(0);
+            }
+            break;
+
+        case "RANDOM":
+            for (let i = 0; i < nPadding; i++) {
+                paddedMessage.push(Math.floor(Math.random() * 256));
+            }
+            break;
+
+        case "BIT":
+            paddedMessage.push(0x80);
+            for (let i = 1; i < nPadding; i++) {
+                paddedMessage.push(0);
+            }
+            break;
+
+        default:
+            throw new OperationError(`Unknown padding type: ${padding}`);
+    }
+
+    return paddedMessage;
+}
+
+/**
+ * Remove padding from message
+ * @param {number[]} message - Padded message
+ * @param {string} padding - Padding type ("NO", "PKCS5", "ZERO", "RANDOM", "BIT")
+ * @param {number} blockSize - Block size in bytes
+ * @returns {number[]} - Unpadded message
+ */
+function removePadding(message, padding, blockSize) {
+    if (message.length === 0) return message;
+
+    switch (padding) {
+        case "NO":
+        case "ZERO":
+        case "RANDOM":
+            // These padding types cannot be reliably removed
+            return message;
+
+        case "PKCS5": {
+            const padByte = message[message.length - 1];
+            if (padByte > 0 && padByte <= blockSize) {
+                // Verify padding
+                for (let i = 0; i < padByte; i++) {
+                    if (message[message.length - 1 - i] !== padByte) {
+                        throw new OperationError("Invalid PKCS#5 padding.");
+                    }
+                }
+                return message.slice(0, message.length - padByte);
+            }
+            throw new OperationError("Invalid PKCS#5 padding.");
+        }
+
+        case "BIT": {
+            // Find 0x80 byte working backwards, skipping zeros
+            for (let i = message.length - 1; i >= 0; i--) {
+                if (message[i] === 0x80) {
+                    return message.slice(0, i);
+                } else if (message[i] !== 0) {
+                    throw new OperationError("Invalid BIT padding.");
+                }
+            }
+            throw new OperationError("Invalid BIT padding.");
+        }
+
+        default:
+            throw new OperationError(`Unknown padding type: ${padding}`);
+    }
+}
+
+/**
+ * Encrypt using PRESENT cipher with specified block mode
+ *
+ * @param {number[]} message - Plaintext as byte array
+ * @param {number[]} key - Key (10 bytes for 80-bit or 16 bytes for 128-bit)
+ * @param {number[]} iv - IV (8 bytes, not used for ECB)
+ * @param {string} mode - Block cipher mode ("ECB" or "CBC")
+ * @param {string} padding - Padding type ("NO", "PKCS5", "ZERO", "RANDOM", "BIT")
+ * @returns {number[]} - Ciphertext as byte array
+ */
+export function encryptPRESENT(message, key, iv, mode = "ECB", padding = "PKCS5") {
+    if (message.length === 0) return [];
+
+    // Generate round keys based on key length
+    const roundKeys = key.length === 10 ?
+        generateRoundKeys80(key) :
+        generateRoundKeys128(key);
+
+    // Apply padding
+    const paddedMessage = applyPadding(message, padding, BLOCKSIZE);
+
+    const cipherText = [];
+
+    switch (mode) {
+        case "ECB":
+            for (let i = 0; i < paddedMessage.length; i += BLOCKSIZE) {
+                const block = bytesToBigInt(paddedMessage.slice(i, i + BLOCKSIZE));
+                const encrypted = encryptBlock(block, roundKeys);
+                cipherText.push(...bigIntToBytes(encrypted, BLOCKSIZE));
+            }
+            break;
+
+        case "CBC": {
+            let ivBlock = bytesToBigInt(iv);
+            for (let i = 0; i < paddedMessage.length; i += BLOCKSIZE) {
+                let block = bytesToBigInt(paddedMessage.slice(i, i + BLOCKSIZE));
+                block ^= ivBlock;
+                const encrypted = encryptBlock(block, roundKeys);
+                cipherText.push(...bigIntToBytes(encrypted, BLOCKSIZE));
+                ivBlock = encrypted;
+            }
+            break;
+        }
+
+        default:
+            throw new OperationError(`Invalid block cipher mode: ${mode}`);
+    }
+
+    return cipherText;
+}
+
+/**
+ * Decrypt using PRESENT cipher with specified block mode
+ *
+ * @param {number[]} cipherText - Ciphertext as byte array
+ * @param {number[]} key - Key (10 bytes for 80-bit or 16 bytes for 128-bit)
+ * @param {number[]} iv - IV (8 bytes, not used for ECB)
+ * @param {string} mode - Block cipher mode ("ECB" or "CBC")
+ * @param {string} padding - Padding type ("NO", "PKCS5", "ZERO", "RANDOM", "BIT")
+ * @returns {number[]} - Plaintext as byte array
+ */
+export function decryptPRESENT(cipherText, key, iv, mode = "ECB", padding = "PKCS5") {
+    if (cipherText.length === 0) return [];
+
+    if (cipherText.length % BLOCKSIZE !== 0) {
+        throw new OperationError(`Invalid ciphertext length: ${cipherText.length} bytes. Must be a multiple of 8.`);
+    }
+
+    // Generate round keys based on key length
+    const roundKeys = key.length === 10 ?
+        generateRoundKeys80(key) :
+        generateRoundKeys128(key);
+
+    const plainText = [];
+
+    switch (mode) {
+        case "ECB":
+            for (let i = 0; i < cipherText.length; i += BLOCKSIZE) {
+                const block = bytesToBigInt(cipherText.slice(i, i + BLOCKSIZE));
+                const decrypted = decryptBlock(block, roundKeys);
+                plainText.push(...bigIntToBytes(decrypted, BLOCKSIZE));
+            }
+            break;
+
+        case "CBC": {
+            let ivBlock = bytesToBigInt(iv);
+            for (let i = 0; i < cipherText.length; i += BLOCKSIZE) {
+                const block = bytesToBigInt(cipherText.slice(i, i + BLOCKSIZE));
+                let decrypted = decryptBlock(block, roundKeys);
+                decrypted ^= ivBlock;
+                plainText.push(...bigIntToBytes(decrypted, BLOCKSIZE));
+                ivBlock = block;
+            }
+            break;
+        }
+
+        default:
+            throw new OperationError(`Invalid block cipher mode: ${mode}`);
+    }
+
+    // Remove padding
+    return removePadding(plainText, padding, BLOCKSIZE);
+}

src/core/lib/Twofish.mjs

@@ -0,0 +1,608 @@
+/**
+ * Complete implementation of Twofish block cipher encryption/decryption with
+ * ECB, CBC, CFB, OFB, CTR block modes.
+ *
+ * Twofish was an AES finalist designed by Bruce Schneier et al.
+ * Reference: https://www.schneier.com/academic/twofish/
+ *
+ * @author Medjedtxm
+ * @copyright Crown Copyright 2026
+ * @license Apache-2.0
+ */
+
+import OperationError from "../errors/OperationError.mjs";
+
+/** Number of rounds */
+const NROUNDS = 16;
+
+/** Block size in bytes (128 bits) */
+const BLOCKSIZE = 16;
+
+/** Q0 permutation */
+const Q0 = [
+    0xa9, 0x67, 0xb3, 0xe8, 0x04, 0xfd, 0xa3, 0x76, 0x9a, 0x92, 0x80, 0x78, 0xe4, 0xdd, 0xd1, 0x38,
+    0x0d, 0xc6, 0x35, 0x98, 0x18, 0xf7, 0xec, 0x6c, 0x43, 0x75, 0x37, 0x26, 0xfa, 0x13, 0x94, 0x48,
+    0xf2, 0xd0, 0x8b, 0x30, 0x84, 0x54, 0xdf, 0x23, 0x19, 0x5b, 0x3d, 0x59, 0xf3, 0xae, 0xa2, 0x82,
+    0x63, 0x01, 0x83, 0x2e, 0xd9, 0x51, 0x9b, 0x7c, 0xa6, 0xeb, 0xa5, 0xbe, 0x16, 0x0c, 0xe3, 0x61,
+    0xc0, 0x8c, 0x3a, 0xf5, 0x73, 0x2c, 0x25, 0x0b, 0xbb, 0x4e, 0x89, 0x6b, 0x53, 0x6a, 0xb4, 0xf1,
+    0xe1, 0xe6, 0xbd, 0x45, 0xe2, 0xf4, 0xb6, 0x66, 0xcc, 0x95, 0x03, 0x56, 0xd4, 0x1c, 0x1e, 0xd7,
+    0xfb, 0xc3, 0x8e, 0xb5, 0xe9, 0xcf, 0xbf, 0xba, 0xea, 0x77, 0x39, 0xaf, 0x33, 0xc9, 0x62, 0x71,
+    0x81, 0x79, 0x09, 0xad, 0x24, 0xcd, 0xf9, 0xd8, 0xe5, 0xc5, 0xb9, 0x4d, 0x44, 0x08, 0x86, 0xe7,
+    0xa1, 0x1d, 0xaa, 0xed, 0x06, 0x70, 0xb2, 0xd2, 0x41, 0x7b, 0xa0, 0x11, 0x31, 0xc2, 0x27, 0x90,
+    0x20, 0xf6, 0x60, 0xff, 0x96, 0x5c, 0xb1, 0xab, 0x9e, 0x9c, 0x52, 0x1b, 0x5f, 0x93, 0x0a, 0xef,
+    0x91, 0x85, 0x49, 0xee, 0x2d, 0x4f, 0x8f, 0x3b, 0x47, 0x87, 0x6d, 0x46, 0xd6, 0x3e, 0x69, 0x64,
+    0x2a, 0xce, 0xcb, 0x2f, 0xfc, 0x97, 0x05, 0x7a, 0xac, 0x7f, 0xd5, 0x1a, 0x4b, 0x0e, 0xa7, 0x5a,
+    0x28, 0x14, 0x3f, 0x29, 0x88, 0x3c, 0x4c, 0x02, 0xb8, 0xda, 0xb0, 0x17, 0x55, 0x1f, 0x8a, 0x7d,
+    0x57, 0xc7, 0x8d, 0x74, 0xb7, 0xc4, 0x9f, 0x72, 0x7e, 0x15, 0x22, 0x12, 0x58, 0x07, 0x99, 0x34,
+    0x6e, 0x50, 0xde, 0x68, 0x65, 0xbc, 0xdb, 0xf8, 0xc8, 0xa8, 0x2b, 0x40, 0xdc, 0xfe, 0x32, 0xa4,
+    0xca, 0x10, 0x21, 0xf0, 0xd3, 0x5d, 0x0f, 0x00, 0x6f, 0x9d, 0x36, 0x42, 0x4a, 0x5e, 0xc1, 0xe0
+];
+
+/** Q1 permutation */
+const Q1 = [
+    0x75, 0xf3, 0xc6, 0xf4, 0xdb, 0x7b, 0xfb, 0xc8, 0x4a, 0xd3, 0xe6, 0x6b, 0x45, 0x7d, 0xe8, 0x4b,
+    0xd6, 0x32, 0xd8, 0xfd, 0x37, 0x71, 0xf1, 0xe1, 0x30, 0x0f, 0xf8, 0x1b, 0x87, 0xfa, 0x06, 0x3f,
+    0x5e, 0xba, 0xae, 0x5b, 0x8a, 0x00, 0xbc, 0x9d, 0x6d, 0xc1, 0xb1, 0x0e, 0x80, 0x5d, 0xd2, 0xd5,
+    0xa0, 0x84, 0x07, 0x14, 0xb5, 0x90, 0x2c, 0xa3, 0xb2, 0x73, 0x4c, 0x54, 0x92, 0x74, 0x36, 0x51,
+    0x38, 0xb0, 0xbd, 0x5a, 0xfc, 0x60, 0x62, 0x96, 0x6c, 0x42, 0xf7, 0x10, 0x7c, 0x28, 0x27, 0x8c,
+    0x13, 0x95, 0x9c, 0xc7, 0x24, 0x46, 0x3b, 0x70, 0xca, 0xe3, 0x85, 0xcb, 0x11, 0xd0, 0x93, 0xb8,
+    0xa6, 0x83, 0x20, 0xff, 0x9f, 0x77, 0xc3, 0xcc, 0x03, 0x6f, 0x08, 0xbf, 0x40, 0xe7, 0x2b, 0xe2,
+    0x79, 0x0c, 0xaa, 0x82, 0x41, 0x3a, 0xea, 0xb9, 0xe4, 0x9a, 0xa4, 0x97, 0x7e, 0xda, 0x7a, 0x17,
+    0x66, 0x94, 0xa1, 0x1d, 0x3d, 0xf0, 0xde, 0xb3, 0x0b, 0x72, 0xa7, 0x1c, 0xef, 0xd1, 0x53, 0x3e,
+    0x8f, 0x33, 0x26, 0x5f, 0xec, 0x76, 0x2a, 0x49, 0x81, 0x88, 0xee, 0x21, 0xc4, 0x1a, 0xeb, 0xd9,
+    0xc5, 0x39, 0x99, 0xcd, 0xad, 0x31, 0x8b, 0x01, 0x18, 0x23, 0xdd, 0x1f, 0x4e, 0x2d, 0xf9, 0x48,
+    0x4f, 0xf2, 0x65, 0x8e, 0x78, 0x5c, 0x58, 0x19, 0x8d, 0xe5, 0x98, 0x57, 0x67, 0x7f, 0x05, 0x64,
+    0xaf, 0x63, 0xb6, 0xfe, 0xf5, 0xb7, 0x3c, 0xa5, 0xce, 0xe9, 0x68, 0x44, 0xe0, 0x4d, 0x43, 0x69,
+    0x29, 0x2e, 0xac, 0x15, 0x59, 0xa8, 0x0a, 0x9e, 0x6e, 0x47, 0xdf, 0x34, 0x35, 0x6a, 0xcf, 0xdc,
+    0x22, 0xc9, 0xc0, 0x9b, 0x89, 0xd4, 0xed, 0xab, 0x12, 0xa2, 0x0d, 0x52, 0xbb, 0x02, 0x2f, 0xa9,
+    0xd7, 0x61, 0x1e, 0xb4, 0x50, 0x04, 0xf6, 0xc2, 0x16, 0x25, 0x86, 0x56, 0x55, 0x09, 0xbe, 0x91
+];
+
+/** Reed-Solomon matrix for key schedule */
+const RS = [
+    [0x01, 0xA4, 0x55, 0x87, 0x5A, 0x58, 0xDB, 0x9E],
+    [0xA4, 0x56, 0x82, 0xF3, 0x1E, 0xC6, 0x68, 0xE5],
+    [0x02, 0xA1, 0xFC, 0xC1, 0x47, 0xAE, 0x3D, 0x19],
+    [0xA4, 0x55, 0x87, 0x5A, 0x58, 0xDB, 0x9E, 0x03]
+];
+
+/**
+ * Galois Field multiplication in GF(2^8) with polynomial 0x169
+ */
+function gfMult(a, b, poly) {
+    let result = 0;
+    while (b) {
+        if (b & 1) result ^= a;
+        a <<= 1;
+        if (a & 0x100) a ^= poly;
+        b >>>= 1;
+    }
+    return result & 0xFF;
+}
+
+/**
+ * MDS multiplication
+ */
+function mdsMultiply(x) {
+    const b0 = x & 0xFF;
+    const b1 = (x >>> 8) & 0xFF;
+    const b2 = (x >>> 16) & 0xFF;
+    const b3 = (x >>> 24) & 0xFF;
+
+    // MDS matrix multiplication in GF(2^8) with polynomial 0x169
+    const r0 = gfMult(b0, 0x01, 0x169) ^ gfMult(b1, 0xEF, 0x169) ^ gfMult(b2, 0x5B, 0x169) ^ gfMult(b3, 0x5B, 0x169);
+    const r1 = gfMult(b0, 0x5B, 0x169) ^ gfMult(b1, 0xEF, 0x169) ^ gfMult(b2, 0xEF, 0x169) ^ gfMult(b3, 0x01, 0x169);
+    const r2 = gfMult(b0, 0xEF, 0x169) ^ gfMult(b1, 0x5B, 0x169) ^ gfMult(b2, 0x01, 0x169) ^ gfMult(b3, 0xEF, 0x169);
+    const r3 = gfMult(b0, 0xEF, 0x169) ^ gfMult(b1, 0x01, 0x169) ^ gfMult(b2, 0xEF, 0x169) ^ gfMult(b3, 0x5B, 0x169);
+
+    return (r3 << 24) | (r2 << 16) | (r1 << 8) | r0;
+}
+
+/**
+ * Reed-Solomon multiplication for key schedule
+ */
+function rsMultiply(key8) {
+    let result = 0;
+    for (let i = 0; i < 4; i++) {
+        let x = 0;
+        for (let j = 0; j < 8; j++) {
+            x ^= gfMult(RS[i][j], key8[j], 0x14D);
+        }
+        result |= x << (i * 8);
+    }
+    return result;
+}
+
+/**
+ * Apply h function (the main keyed permutation)
+ */
+function h(x, L, k) {
+    const y = new Array(4);
+    y[0] = x & 0xFF;
+    y[1] = (x >>> 8) & 0xFF;
+    y[2] = (x >>> 16) & 0xFF;
+    y[3] = (x >>> 24) & 0xFF;
+
+    if (k === 4) {
+        y[0] = Q1[y[0]] ^ (L[3] & 0xFF);
+        y[1] = Q0[y[1]] ^ ((L[3] >>> 8) & 0xFF);
+        y[2] = Q0[y[2]] ^ ((L[3] >>> 16) & 0xFF);
+        y[3] = Q1[y[3]] ^ ((L[3] >>> 24) & 0xFF);
+    }
+    if (k >= 3) {
+        y[0] = Q1[y[0]] ^ (L[2] & 0xFF);
+        y[1] = Q1[y[1]] ^ ((L[2] >>> 8) & 0xFF);
+        y[2] = Q0[y[2]] ^ ((L[2] >>> 16) & 0xFF);
+        y[3] = Q0[y[3]] ^ ((L[2] >>> 24) & 0xFF);
+    }
+
+    // Always do k >= 2
+    y[0] = Q0[Q0[y[0]] ^ (L[1] & 0xFF)] ^ (L[0] & 0xFF);
+    y[1] = Q0[Q1[y[1]] ^ ((L[1] >>> 8) & 0xFF)] ^ ((L[0] >>> 8) & 0xFF);
+    y[2] = Q1[Q0[y[2]] ^ ((L[1] >>> 16) & 0xFF)] ^ ((L[0] >>> 16) & 0xFF);
+    y[3] = Q1[Q1[y[3]] ^ ((L[1] >>> 24) & 0xFF)] ^ ((L[0] >>> 24) & 0xFF);
+
+    // Final q-box lookup
+    y[0] = Q1[y[0]];
+    y[1] = Q0[y[1]];
+    y[2] = Q1[y[2]];
+    y[3] = Q0[y[3]];
+
+    return mdsMultiply((y[3] << 24) | (y[2] << 16) | (y[1] << 8) | y[0]);
+}
+
+/**
+ * Rotate left 32-bit
+ */
+function ROL(x, n) {
+    return ((x << n) | (x >>> (32 - n))) >>> 0;
+}
+
+/**
+ * Rotate right 32-bit
+ */
+function ROR(x, n) {
+    return ((x >>> n) | (x << (32 - n))) >>> 0;
+}
+
+/**
+ * Generate subkeys from the key
+ */
+function generateSubkeys(key) {
+    const keyLen = key.length;
+    const k = keyLen / 8; // 2, 3, or 4
+
+    // Split key into Me (even words) and Mo (odd words)
+    const Me = new Array(k);
+    const Mo = new Array(k);
+
+    for (let i = 0; i < k; i++) {
+        const offset = i * 8;
+        Me[i] = (key[offset]) | (key[offset + 1] << 8) |
+                (key[offset + 2] << 16) | (key[offset + 3] << 24);
+        Mo[i] = (key[offset + 4]) | (key[offset + 5] << 8) |
+                (key[offset + 6] << 16) | (key[offset + 7] << 24);
+    }
+
+    // Generate S-box keys using Reed-Solomon
+    const S = new Array(k);
+    for (let i = 0; i < k; i++) {
+        const offset = (k - 1 - i) * 8;
+        S[i] = rsMultiply(key.slice(offset, offset + 8));
+    }
+
+    // Generate round subkeys
+    const subkeys = new Array(40);
+    const rho = 0x01010101;
+
+    for (let i = 0; i < 20; i++) {
+        const A = h(2 * i * rho, Me, k);
+        const B = ROL(h((2 * i + 1) * rho, Mo, k), 8);
+        subkeys[2 * i] = (A + B) >>> 0;
+        subkeys[2 * i + 1] = ROL((A + 2 * B) >>> 0, 9);
+    }
+
+    return { subkeys, S, k };
+}
+
+/**
+ * g function using precomputed S-box keys
+ */
+function g(x, S, k) {
+    return h(x, S, k);
+}
+
+/**
+ * Encrypt a single 128-bit block
+ */
+function encryptBlock(block, keyData) {
+    const { subkeys, S, k } = keyData;
+
+    // Split block into 4 words (little-endian)
+    let R0 = (block[0]) | (block[1] << 8) | (block[2] << 16) | (block[3] << 24);
+    let R1 = (block[4]) | (block[5] << 8) | (block[6] << 16) | (block[7] << 24);
+    let R2 = (block[8]) | (block[9] << 8) | (block[10] << 16) | (block[11] << 24);
+    let R3 = (block[12]) | (block[13] << 8) | (block[14] << 16) | (block[15] << 24);
+
+    // Input whitening
+    R0 ^= subkeys[0];
+    R1 ^= subkeys[1];
+    R2 ^= subkeys[2];
+    R3 ^= subkeys[3];
+
+    // 16 rounds
+    for (let r = 0; r < NROUNDS; r += 2) {
+        let T0 = g(R0, S, k);
+        let T1 = g(ROL(R1, 8), S, k);
+        R2 = ROR(R2 ^ ((T0 + T1 + subkeys[8 + 2 * r]) >>> 0), 1);
+        R3 = ROL(R3, 1) ^ ((T0 + 2 * T1 + subkeys[9 + 2 * r]) >>> 0);
+
+        T0 = g(R2, S, k);
+        T1 = g(ROL(R3, 8), S, k);
+        R0 = ROR(R0 ^ ((T0 + T1 + subkeys[8 + 2 * r + 2]) >>> 0), 1);
+        R1 = ROL(R1, 1) ^ ((T0 + 2 * T1 + subkeys[9 + 2 * r + 2]) >>> 0);
+    }
+
+    // Output whitening (with undo of last swap)
+    R2 ^= subkeys[4];
+    R3 ^= subkeys[5];
+    R0 ^= subkeys[6];
+    R1 ^= subkeys[7];
+
+    // Convert back to bytes (little-endian)
+    return [
+        R2 & 0xFF, (R2 >>> 8) & 0xFF, (R2 >>> 16) & 0xFF, (R2 >>> 24) & 0xFF,
+        R3 & 0xFF, (R3 >>> 8) & 0xFF, (R3 >>> 16) & 0xFF, (R3 >>> 24) & 0xFF,
+        R0 & 0xFF, (R0 >>> 8) & 0xFF, (R0 >>> 16) & 0xFF, (R0 >>> 24) & 0xFF,
+        R1 & 0xFF, (R1 >>> 8) & 0xFF, (R1 >>> 16) & 0xFF, (R1 >>> 24) & 0xFF
+    ];
+}
+
+/**
+ * Decrypt a single 128-bit block
+ */
+function decryptBlock(block, keyData) {
+    const { subkeys, S, k } = keyData;
+
+    // Split block into 4 words (little-endian)
+    let R0 = (block[0]) | (block[1] << 8) | (block[2] << 16) | (block[3] << 24);
+    let R1 = (block[4]) | (block[5] << 8) | (block[6] << 16) | (block[7] << 24);
+    let R2 = (block[8]) | (block[9] << 8) | (block[10] << 16) | (block[11] << 24);
+    let R3 = (block[12]) | (block[13] << 8) | (block[14] << 16) | (block[15] << 24);
+
+    // Input whitening (reverse of output whitening)
+    R0 ^= subkeys[4];
+    R1 ^= subkeys[5];
+    R2 ^= subkeys[6];
+    R3 ^= subkeys[7];
+
+    // 16 rounds in reverse
+    for (let r = NROUNDS - 2; r >= 0; r -= 2) {
+        let T0 = g(R0, S, k);
+        let T1 = g(ROL(R1, 8), S, k);
+        R2 = ROL(R2, 1) ^ ((T0 + T1 + subkeys[8 + 2 * r + 2]) >>> 0);
+        R3 = ROR(R3 ^ ((T0 + 2 * T1 + subkeys[9 + 2 * r + 2]) >>> 0), 1);
+
+        T0 = g(R2, S, k);
+        T1 = g(ROL(R3, 8), S, k);
+        R0 = ROL(R0, 1) ^ ((T0 + T1 + subkeys[8 + 2 * r]) >>> 0);
+        R1 = ROR(R1 ^ ((T0 + 2 * T1 + subkeys[9 + 2 * r]) >>> 0), 1);
+    }
+
+    // Output whitening (reverse of input whitening)
+    R2 ^= subkeys[0];
+    R3 ^= subkeys[1];
+    R0 ^= subkeys[2];
+    R1 ^= subkeys[3];
+
+    // Convert back to bytes (little-endian)
+    return [
+        R2 & 0xFF, (R2 >>> 8) & 0xFF, (R2 >>> 16) & 0xFF, (R2 >>> 24) & 0xFF,
+        R3 & 0xFF, (R3 >>> 8) & 0xFF, (R3 >>> 16) & 0xFF, (R3 >>> 24) & 0xFF,
+        R0 & 0xFF, (R0 >>> 8) & 0xFF, (R0 >>> 16) & 0xFF, (R0 >>> 24) & 0xFF,
+        R1 & 0xFF, (R1 >>> 8) & 0xFF, (R1 >>> 16) & 0xFF, (R1 >>> 24) & 0xFF
+    ];
+}
+
+/**
+ * XOR two 16-byte blocks
+ */
+function xorBlocks(a, b) {
+    const result = new Array(16);
+    for (let i = 0; i < 16; i++) {
+        result[i] = a[i] ^ b[i];
+    }
+    return result;
+}
+
+/**
+ * Increment counter (little-endian)
+ */
+function incrementCounter(counter) {
+    const result = [...counter];
+    for (let i = 0; i < 16; i++) {
+        result[i]++;
+        if (result[i] <= 255) break;
+        result[i] = 0;
+    }
+    return result;
+}
+
+/**
+ * Apply padding to message
+ * @param {number[]} message - Original message
+ * @param {string} padding - Padding type ("NO", "PKCS5", "ZERO", "RANDOM", "BIT")
+ * @param {number} blockSize - Block size in bytes
+ * @returns {number[]} - Padded message
+ */
+function applyPadding(message, padding, blockSize) {
+    const remainder = message.length % blockSize;
+    let nPadding = remainder === 0 ? 0 : blockSize - remainder;
+
+    // For PKCS5, always add at least one byte (full block if already aligned)
+    if (padding === "PKCS5" && remainder === 0) {
+        nPadding = blockSize;
+    }
+
+    if (nPadding === 0) return [...message];
+
+    const paddedMessage = [...message];
+
+    switch (padding) {
+        case "NO":
+            throw new OperationError(`No padding requested but input is not a ${blockSize}-byte multiple.`);
+
+        case "PKCS5":
+            for (let i = 0; i < nPadding; i++) {
+                paddedMessage.push(nPadding);
+            }
+            break;
+
+        case "ZERO":
+            for (let i = 0; i < nPadding; i++) {
+                paddedMessage.push(0);
+            }
+            break;
+
+        case "RANDOM":
+            for (let i = 0; i < nPadding; i++) {
+                paddedMessage.push(Math.floor(Math.random() * 256));
+            }
+            break;
+
+        case "BIT":
+            paddedMessage.push(0x80);
+            for (let i = 1; i < nPadding; i++) {
+                paddedMessage.push(0);
+            }
+            break;
+
+        default:
+            throw new OperationError(`Unknown padding type: ${padding}`);
+    }
+
+    return paddedMessage;
+}
+
+/**
+ * Remove padding from message
+ * @param {number[]} message - Padded message
+ * @param {string} padding - Padding type ("NO", "PKCS5", "ZERO", "RANDOM", "BIT")
+ * @param {number} blockSize - Block size in bytes
+ * @returns {number[]} - Unpadded message
+ */
+function removePadding(message, padding, blockSize) {
+    if (message.length === 0) return message;
+
+    switch (padding) {
+        case "NO":
+        case "ZERO":
+        case "RANDOM":
+            // These padding types cannot be reliably removed
+            return message;
+
+        case "PKCS5": {
+            const padByte = message[message.length - 1];
+            if (padByte > 0 && padByte <= blockSize) {
+                // Verify padding
+                for (let i = 0; i < padByte; i++) {
+                    if (message[message.length - 1 - i] !== padByte) {
+                        throw new OperationError("Invalid PKCS#5 padding.");
+                    }
+                }
+                return message.slice(0, message.length - padByte);
+            }
+            throw new OperationError("Invalid PKCS#5 padding.");
+        }
+
+        case "BIT": {
+            // Find 0x80 byte working backwards, skipping zeros
+            for (let i = message.length - 1; i >= 0; i--) {
+                if (message[i] === 0x80) {
+                    return message.slice(0, i);
+                } else if (message[i] !== 0) {
+                    throw new OperationError("Invalid BIT padding.");
+                }
+            }
+            throw new OperationError("Invalid BIT padding.");
+        }
+
+        default:
+            throw new OperationError(`Unknown padding type: ${padding}`);
+    }
+}
+
+/**
+ * Encrypt using Twofish cipher with specified block mode
+ *
+ * @param {number[]} message - Plaintext as byte array
+ * @param {number[]} key - Key (16, 24, or 32 bytes)
+ * @param {number[]} iv - IV (16 bytes, not used for ECB)
+ * @param {string} mode - Block cipher mode ("ECB", "CBC", "CFB", "OFB", "CTR")
+ * @param {string} padding - Padding type ("NO", "PKCS5", "ZERO", "RANDOM", "BIT")
+ * @returns {number[]} - Ciphertext as byte array
+ */
+export function encryptTwofish(message, key, iv, mode = "ECB", padding = "PKCS5") {
+    const messageLength = message.length;
+    if (messageLength === 0) return [];
+
+    const keyData = generateSubkeys(key);
+
+    // Apply padding for ECB/CBC modes
+    let paddedMessage;
+    if (mode === "ECB" || mode === "CBC") {
+        paddedMessage = applyPadding(message, padding, BLOCKSIZE);
+    } else {
+        // Stream modes (CFB, OFB, CTR) don't need padding
+        paddedMessage = [...message];
+    }
+
+    const cipherText = [];
+
+    switch (mode) {
+        case "ECB":
+            for (let i = 0; i < paddedMessage.length; i += BLOCKSIZE) {
+                const block = paddedMessage.slice(i, i + BLOCKSIZE);
+                cipherText.push(...encryptBlock(block, keyData));
+            }
+            break;
+
+        case "CBC": {
+            let ivBlock = [...iv];
+            for (let i = 0; i < paddedMessage.length; i += BLOCKSIZE) {
+                const block = paddedMessage.slice(i, i + BLOCKSIZE);
+                const xored = xorBlocks(block, ivBlock);
+                ivBlock = encryptBlock(xored, keyData);
+                cipherText.push(...ivBlock);
+            }
+            break;
+        }
+
+        case "CFB": {
+            let ivBlock = [...iv];
+            for (let i = 0; i < paddedMessage.length; i += BLOCKSIZE) {
+                const encrypted = encryptBlock(ivBlock, keyData);
+                const block = paddedMessage.slice(i, i + BLOCKSIZE);
+                ivBlock = xorBlocks(encrypted, block);
+                cipherText.push(...ivBlock);
+            }
+            return cipherText.slice(0, messageLength);
+        }
+
+        case "OFB": {
+            let ivBlock = [...iv];
+            for (let i = 0; i < paddedMessage.length; i += BLOCKSIZE) {
+                ivBlock = encryptBlock(ivBlock, keyData);
+                const block = paddedMessage.slice(i, i + BLOCKSIZE);
+                cipherText.push(...xorBlocks(ivBlock, block));
+            }
+            return cipherText.slice(0, messageLength);
+        }
+
+        case "CTR": {
+            let counter = [...iv];
+            for (let i = 0; i < paddedMessage.length; i += BLOCKSIZE) {
+                const encrypted = encryptBlock(counter, keyData);
+                const block = paddedMessage.slice(i, i + BLOCKSIZE);
+                cipherText.push(...xorBlocks(encrypted, block));
+                counter = incrementCounter(counter);
+            }
+            return cipherText.slice(0, messageLength);
+        }
+
+        default:
+            throw new OperationError(`Invalid block cipher mode: ${mode}`);
+    }
+
+    return cipherText;
+}
+
+/**
+ * Decrypt using Twofish cipher with specified block mode
+ *
+ * @param {number[]} cipherText - Ciphertext as byte array
+ * @param {number[]} key - Key (16, 24, or 32 bytes)
+ * @param {number[]} iv - IV (16 bytes, not used for ECB)
+ * @param {string} mode - Block cipher mode ("ECB", "CBC", "CFB", "OFB", "CTR")
+ * @param {string} padding - Padding type ("NO", "PKCS5", "ZERO", "RANDOM", "BIT")
+ * @returns {number[]} - Plaintext as byte array
+ */
+export function decryptTwofish(cipherText, key, iv, mode = "ECB", padding = "PKCS5") {
+    const originalLength = cipherText.length;
+    if (originalLength === 0) return [];
+
+    const keyData = generateSubkeys(key);
+
+    if (mode === "ECB" || mode === "CBC") {
+        if ((originalLength % BLOCKSIZE) !== 0)
+            throw new OperationError(`Invalid ciphertext length: ${originalLength} bytes. Must be a multiple of 16.`);
+    } else {
+        // Pad for stream modes
+        while ((cipherText.length % BLOCKSIZE) !== 0)
+            cipherText.push(0);
+    }
+
+    const plainText = [];
+
+    switch (mode) {
+        case "ECB":
+            for (let i = 0; i < cipherText.length; i += BLOCKSIZE) {
+                const block = cipherText.slice(i, i + BLOCKSIZE);
+                plainText.push(...decryptBlock(block, keyData));
+            }
+            break;
+
+        case "CBC": {
+            let ivBlock = [...iv];
+            for (let i = 0; i < cipherText.length; i += BLOCKSIZE) {
+                const block = cipherText.slice(i, i + BLOCKSIZE);
+                const decrypted = decryptBlock(block, keyData);
+                plainText.push(...xorBlocks(decrypted, ivBlock));
+                ivBlock = block;
+            }
+            break;
+        }
+
+        case "CFB": {
+            let ivBlock = [...iv];
+            for (let i = 0; i < cipherText.length; i += BLOCKSIZE) {
+                const encrypted = encryptBlock(ivBlock, keyData);
+                const block = cipherText.slice(i, i + BLOCKSIZE);
+                plainText.push(...xorBlocks(encrypted, block));
+                ivBlock = block;
+            }
+            return plainText.slice(0, originalLength);
+        }
+
+        case "OFB": {
+            let ivBlock = [...iv];
+            for (let i = 0; i < cipherText.length; i += BLOCKSIZE) {
+                ivBlock = encryptBlock(ivBlock, keyData);
+                const block = cipherText.slice(i, i + BLOCKSIZE);
+                plainText.push(...xorBlocks(ivBlock, block));
+            }
+            return plainText.slice(0, originalLength);
+        }
+
+        case "CTR": {
+            let counter = [...iv];
+            for (let i = 0; i < cipherText.length; i += BLOCKSIZE) {
+                const encrypted = encryptBlock(counter, keyData);
+                const block = cipherText.slice(i, i + BLOCKSIZE);
+                plainText.push(...xorBlocks(encrypted, block));
+                counter = incrementCounter(counter);
+            }
+            return plainText.slice(0, originalLength);
+        }
+
+        default:
+            throw new OperationError(`Invalid block cipher mode: ${mode}`);
+    }
+
+    // Remove padding for ECB/CBC modes
+    if (mode === "ECB" || mode === "CBC") {
+        return removePadding(plainText, padding, BLOCKSIZE);
+    }
+
+    return plainText.slice(0, originalLength);
+}

src/core/operations/PRESENTDecrypt.mjs

@@ -0,0 +1,94 @@
+/**
+ * @author Medjedtxm
+ * @copyright Crown Copyright 2026
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+import Utils from "../Utils.mjs";
+import OperationError from "../errors/OperationError.mjs";
+import { toHex } from "../lib/Hex.mjs";
+import { decryptPRESENT } from "../lib/Present.mjs";
+
+/**
+ * PRESENT Decrypt operation
+ */
+class PRESENTDecrypt extends Operation {
+
+    /**
+     * PRESENTDecrypt constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "PRESENT Decrypt";
+        this.module = "Ciphers";
+        this.description = "PRESENT is an ultra-lightweight block cipher designed for constrained environments such as RFID tags and sensor networks. It operates on 64-bit blocks and supports 80-bit or 128-bit keys with 31 rounds. Standardised in ISO/IEC 29192-2:2019.<br><br>When using CBC mode, the PKCS#7 padding scheme is used.";
+        this.infoURL = "https://wikipedia.org/wiki/PRESENT_(cipher)";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [
+            {
+                "name": "Key",
+                "type": "toggleString",
+                "value": "",
+                "toggleValues": ["Hex", "UTF8", "Latin1", "Base64"]
+            },
+            {
+                "name": "IV",
+                "type": "toggleString",
+                "value": "",
+                "toggleValues": ["Hex", "UTF8", "Latin1", "Base64"]
+            },
+            {
+                "name": "Mode",
+                "type": "option",
+                "value": ["CBC", "ECB"]
+            },
+            {
+                "name": "Input",
+                "type": "option",
+                "value": ["Hex", "Raw"]
+            },
+            {
+                "name": "Output",
+                "type": "option",
+                "value": ["Raw", "Hex"]
+            },
+            {
+                "name": "Padding",
+                "type": "option",
+                "value": ["PKCS5", "NO", "ZERO", "RANDOM", "BIT"]
+            }
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        const key = Utils.convertToByteArray(args[0].string, args[0].option),
+            iv = Utils.convertToByteArray(args[1].string, args[1].option),
+            [,, mode, inputType, outputType, padding] = args;
+
+        if (key.length !== 10 && key.length !== 16)
+            throw new OperationError(`Invalid key length: ${key.length} bytes
+
+PRESENT uses a key length of 10 bytes (80 bits) or 16 bytes (128 bits).`);
+
+        if (iv.length !== 8 && mode !== "ECB")
+            throw new OperationError(`Invalid IV length: ${iv.length} bytes
+
+PRESENT uses an IV length of 8 bytes (64 bits).
+Make sure you have specified the type correctly (e.g. Hex vs UTF8).`);
+
+        input = Utils.convertToByteArray(input, inputType);
+        const output = decryptPRESENT(input, key, iv, mode, padding);
+        return outputType === "Hex" ? toHex(output, "") : Utils.byteArrayToUtf8(output);
+    }
+
+}
+
+export default PRESENTDecrypt;

src/core/operations/PRESENTEncrypt.mjs

@@ -0,0 +1,94 @@
+/**
+ * @author Medjedtxm
+ * @copyright Crown Copyright 2026
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+import Utils from "../Utils.mjs";
+import OperationError from "../errors/OperationError.mjs";
+import { toHex } from "../lib/Hex.mjs";
+import { encryptPRESENT } from "../lib/Present.mjs";
+
+/**
+ * PRESENT Encrypt operation
+ */
+class PRESENTEncrypt extends Operation {
+
+    /**
+     * PRESENTEncrypt constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "PRESENT Encrypt";
+        this.module = "Ciphers";
+        this.description = "PRESENT is an ultra-lightweight block cipher designed for constrained environments such as RFID tags and sensor networks. It operates on 64-bit blocks and supports 80-bit or 128-bit keys with 31 rounds. Standardised in ISO/IEC 29192-2:2019.<br><br>When using CBC mode, the PKCS#7 padding scheme is used.";
+        this.infoURL = "https://wikipedia.org/wiki/PRESENT_(cipher)";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [
+            {
+                "name": "Key",
+                "type": "toggleString",
+                "value": "",
+                "toggleValues": ["Hex", "UTF8", "Latin1", "Base64"]
+            },
+            {
+                "name": "IV",
+                "type": "toggleString",
+                "value": "",
+                "toggleValues": ["Hex", "UTF8", "Latin1", "Base64"]
+            },
+            {
+                "name": "Mode",
+                "type": "option",
+                "value": ["CBC", "ECB"]
+            },
+            {
+                "name": "Input",
+                "type": "option",
+                "value": ["Raw", "Hex"]
+            },
+            {
+                "name": "Output",
+                "type": "option",
+                "value": ["Hex", "Raw"]
+            },
+            {
+                "name": "Padding",
+                "type": "option",
+                "value": ["PKCS5", "NO", "ZERO", "RANDOM", "BIT"]
+            }
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        const key = Utils.convertToByteArray(args[0].string, args[0].option),
+            iv = Utils.convertToByteArray(args[1].string, args[1].option),
+            [,, mode, inputType, outputType, padding] = args;
+
+        if (key.length !== 10 && key.length !== 16)
+            throw new OperationError(`Invalid key length: ${key.length} bytes
+
+PRESENT uses a key length of 10 bytes (80 bits) or 16 bytes (128 bits).`);
+
+        if (iv.length !== 8 && mode !== "ECB")
+            throw new OperationError(`Invalid IV length: ${iv.length} bytes
+
+PRESENT uses an IV length of 8 bytes (64 bits).
+Make sure you have specified the type correctly (e.g. Hex vs UTF8).`);
+
+        input = Utils.convertToByteArray(input, inputType);
+        const output = encryptPRESENT(input, key, iv, mode, padding);
+        return outputType === "Hex" ? toHex(output, "") : Utils.byteArrayToUtf8(output);
+    }
+
+}
+
+export default PRESENTEncrypt;

src/core/operations/TwofishDecrypt.mjs

@@ -0,0 +1,94 @@
+/**
+ * @author Medjedtxm
+ * @copyright Crown Copyright 2026
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+import Utils from "../Utils.mjs";
+import OperationError from "../errors/OperationError.mjs";
+import { toHex } from "../lib/Hex.mjs";
+import { decryptTwofish } from "../lib/Twofish.mjs";
+
+/**
+ * Twofish Decrypt operation
+ */
+class TwofishDecrypt extends Operation {
+
+    /**
+     * TwofishDecrypt constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Twofish Decrypt";
+        this.module = "Ciphers";
+        this.description = "Twofish is a symmetric key block cipher designed by Bruce Schneier. It was one of the five AES finalists. Twofish operates on 128-bit blocks and supports key sizes of 128, 192, or 256 bits with 16 rounds of a Feistel network.<br><br>When using CBC or ECB mode, the PKCS#7 padding scheme is used.";
+        this.infoURL = "https://wikipedia.org/wiki/Twofish";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [
+            {
+                "name": "Key",
+                "type": "toggleString",
+                "value": "",
+                "toggleValues": ["Hex", "UTF8", "Latin1", "Base64"]
+            },
+            {
+                "name": "IV",
+                "type": "toggleString",
+                "value": "",
+                "toggleValues": ["Hex", "UTF8", "Latin1", "Base64"]
+            },
+            {
+                "name": "Mode",
+                "type": "option",
+                "value": ["CBC", "CFB", "OFB", "CTR", "ECB"]
+            },
+            {
+                "name": "Input",
+                "type": "option",
+                "value": ["Hex", "Raw"]
+            },
+            {
+                "name": "Output",
+                "type": "option",
+                "value": ["Raw", "Hex"]
+            },
+            {
+                "name": "Padding",
+                "type": "option",
+                "value": ["PKCS5", "NO", "ZERO", "RANDOM", "BIT"]
+            }
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        const key = Utils.convertToByteArray(args[0].string, args[0].option),
+            iv = Utils.convertToByteArray(args[1].string, args[1].option),
+            [,, mode, inputType, outputType, padding] = args;
+
+        if (key.length !== 16 && key.length !== 24 && key.length !== 32)
+            throw new OperationError(`Invalid key length: ${key.length} bytes
+
+Twofish uses a key length of 16 bytes (128 bits), 24 bytes (192 bits), or 32 bytes (256 bits).`);
+
+        if (iv.length !== 16 && mode !== "ECB")
+            throw new OperationError(`Invalid IV length: ${iv.length} bytes
+
+Twofish uses an IV length of 16 bytes (128 bits).
+Make sure you have specified the type correctly (e.g. Hex vs UTF8).`);
+
+        input = Utils.convertToByteArray(input, inputType);
+        const output = decryptTwofish(input, key, iv, mode, padding);
+        return outputType === "Hex" ? toHex(output, "") : Utils.byteArrayToUtf8(output);
+    }
+
+}
+
+export default TwofishDecrypt;

src/core/operations/TwofishEncrypt.mjs

@@ -0,0 +1,94 @@
+/**
+ * @author Medjedtxm
+ * @copyright Crown Copyright 2026
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation.mjs";
+import Utils from "../Utils.mjs";
+import OperationError from "../errors/OperationError.mjs";
+import { toHex } from "../lib/Hex.mjs";
+import { encryptTwofish } from "../lib/Twofish.mjs";
+
+/**
+ * Twofish Encrypt operation
+ */
+class TwofishEncrypt extends Operation {
+
+    /**
+     * TwofishEncrypt constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Twofish Encrypt";
+        this.module = "Ciphers";
+        this.description = "Twofish is a symmetric key block cipher designed by Bruce Schneier. It was one of the five AES finalists. Twofish operates on 128-bit blocks and supports key sizes of 128, 192, or 256 bits with 16 rounds of a Feistel network.<br><br>When using CBC or ECB mode, the PKCS#7 padding scheme is used.";
+        this.infoURL = "https://wikipedia.org/wiki/Twofish";
+        this.inputType = "string";
+        this.outputType = "string";
+        this.args = [
+            {
+                "name": "Key",
+                "type": "toggleString",
+                "value": "",
+                "toggleValues": ["Hex", "UTF8", "Latin1", "Base64"]
+            },
+            {
+                "name": "IV",
+                "type": "toggleString",
+                "value": "",
+                "toggleValues": ["Hex", "UTF8", "Latin1", "Base64"]
+            },
+            {
+                "name": "Mode",
+                "type": "option",
+                "value": ["CBC", "CFB", "OFB", "CTR", "ECB"]
+            },
+            {
+                "name": "Input",
+                "type": "option",
+                "value": ["Raw", "Hex"]
+            },
+            {
+                "name": "Output",
+                "type": "option",
+                "value": ["Hex", "Raw"]
+            },
+            {
+                "name": "Padding",
+                "type": "option",
+                "value": ["PKCS5", "NO", "ZERO", "RANDOM", "BIT"]
+            }
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {string}
+     */
+    run(input, args) {
+        const key = Utils.convertToByteArray(args[0].string, args[0].option),
+            iv = Utils.convertToByteArray(args[1].string, args[1].option),
+            [,, mode, inputType, outputType, padding] = args;
+
+        if (key.length !== 16 && key.length !== 24 && key.length !== 32)
+            throw new OperationError(`Invalid key length: ${key.length} bytes
+
+Twofish uses a key length of 16 bytes (128 bits), 24 bytes (192 bits), or 32 bytes (256 bits).`);
+
+        if (iv.length !== 16 && mode !== "ECB")
+            throw new OperationError(`Invalid IV length: ${iv.length} bytes
+
+Twofish uses an IV length of 16 bytes (128 bits).
+Make sure you have specified the type correctly (e.g. Hex vs UTF8).`);
+
+        input = Utils.convertToByteArray(input, inputType);
+        const output = encryptTwofish(input, key, iv, mode, padding);
+        return outputType === "Hex" ? toHex(output, "") : Utils.byteArrayToUtf8(output);
+    }
+
+}
+
+export default TwofishEncrypt;

tests/operations/tests/PRESENT.mjs

@@ -0,0 +1,465 @@
+/**
+ * PRESENT cipher tests.
+ *
+ * Test vectors from the original PRESENT paper:
+ * "PRESENT: An Ultra-Lightweight Block Cipher"
+ * https://link.springer.com/chapter/10.1007/978-3-540-74735-2_31
+ * https://www.iacr.org/archive/ches2007/47270450/47270450.pdf
+ *
+ * Note: PKCS5 padding adds an extra block when input is exactly block-aligned.
+ * Round-trip tests verify correct encryption/decryption behavior.
+ *
+ * @author Medjedtxm
+ * @copyright Crown Copyright 2026
+ * @license Apache-2.0
+ */
+
+import TestRegister from "../../lib/TestRegister.mjs";
+
+TestRegister.addTests([
+    // ============================================================
+    // OFFICIAL TEST VECTORS from the original PRESENT paper:
+    // "PRESENT: An Ultra-Lightweight Block Cipher" (Bogdanov et al., CHES 2007)
+    // https://link.springer.com/chapter/10.1007/978-3-540-74735-2_31
+    // Table 3: Test Vectors
+    // ============================================================
+    {
+        name: "PRESENT Official Vector 1: 80-bit zero key, zero plaintext",
+        input: "0000000000000000",
+        expectedOutput: "5579c1387b228445",
+        recipeConfig: [
+            {
+                op: "PRESENT Encrypt",
+                args: [
+                    { string: "00000000000000000000", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Hex", "Hex", "NO"
+                ]
+            }
+        ]
+    },
+    {
+        name: "PRESENT Official Vector 2: 80-bit all-ones key, zero plaintext",
+        input: "0000000000000000",
+        expectedOutput: "e72c46c0f5945049",
+        recipeConfig: [
+            {
+                op: "PRESENT Encrypt",
+                args: [
+                    { string: "ffffffffffffffffffff", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Hex", "Hex", "NO"
+                ]
+            }
+        ]
+    },
+    {
+        name: "PRESENT Official Vector 3: 80-bit zero key, all-ones plaintext",
+        input: "ffffffffffffffff",
+        expectedOutput: "a112ffc72f68417b",
+        recipeConfig: [
+            {
+                op: "PRESENT Encrypt",
+                args: [
+                    { string: "00000000000000000000", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Hex", "Hex", "NO"
+                ]
+            }
+        ]
+    },
+    {
+        name: "PRESENT Official Vector 4: 80-bit all-ones key, all-ones plaintext",
+        input: "ffffffffffffffff",
+        expectedOutput: "3333dcd3213210d2",
+        recipeConfig: [
+            {
+                op: "PRESENT Encrypt",
+                args: [
+                    { string: "ffffffffffffffffffff", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Hex", "Hex", "NO"
+                ]
+            }
+        ]
+    },
+    {
+        name: "PRESENT Official Vector 5: 128-bit zero key, zero plaintext",
+        input: "0000000000000000",
+        expectedOutput: "96db702a2e6900af",
+        recipeConfig: [
+            {
+                op: "PRESENT Encrypt",
+                args: [
+                    { string: "00000000000000000000000000000000", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Hex", "Hex", "NO"
+                ]
+            }
+        ]
+    },
+    {
+        name: "PRESENT Official Vector 6: 128-bit key (SageMath reference)",
+        input: "0123456789abcdef",
+        expectedOutput: "0e9d28685e671dd6",
+        recipeConfig: [
+            {
+                op: "PRESENT Encrypt",
+                args: [
+                    { string: "0123456789abcdef0123456789abcdef", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Hex", "Hex", "NO"
+                ]
+            }
+        ]
+    },
+    // Decrypt verification of official vectors
+    {
+        name: "PRESENT Official Vector 1 Decrypt: 80-bit zero key",
+        input: "5579c1387b228445",
+        expectedOutput: "0000000000000000",
+        recipeConfig: [
+            {
+                op: "PRESENT Decrypt",
+                args: [
+                    { string: "00000000000000000000", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Hex", "Hex", "NO"
+                ]
+            }
+        ]
+    },
+    {
+        name: "PRESENT Official Vector 4 Decrypt: 80-bit all-ones key",
+        input: "3333dcd3213210d2",
+        expectedOutput: "ffffffffffffffff",
+        recipeConfig: [
+            {
+                op: "PRESENT Decrypt",
+                args: [
+                    { string: "ffffffffffffffffffff", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Hex", "Hex", "NO"
+                ]
+            }
+        ]
+    },
+    {
+        name: "PRESENT Official Vector 5 Decrypt: 128-bit zero key",
+        input: "96db702a2e6900af",
+        expectedOutput: "0000000000000000",
+        recipeConfig: [
+            {
+                op: "PRESENT Decrypt",
+                args: [
+                    { string: "00000000000000000000000000000000", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Hex", "Hex", "NO"
+                ]
+            }
+        ]
+    },
+    {
+        name: "PRESENT Official Vector 6 Decrypt: 128-bit key (SageMath reference)",
+        input: "0e9d28685e671dd6",
+        expectedOutput: "0123456789abcdef",
+        recipeConfig: [
+            {
+                op: "PRESENT Decrypt",
+                args: [
+                    { string: "0123456789abcdef0123456789abcdef", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Hex", "Hex", "NO"
+                ]
+            }
+        ]
+    },
+    // ============================================================
+    // Round-trip tests - These verify encryption and decryption work correctly
+    // ============================================================
+    {
+        name: "PRESENT Round-trip: ECB 80-bit key, short message",
+        input: "Hello!!!",
+        expectedOutput: "Hello!!!",
+        recipeConfig: [
+            {
+                op: "PRESENT Encrypt",
+                args: [
+                    { string: "00112233445566778899", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Raw", "Hex", "PKCS5"
+                ]
+            },
+            {
+                op: "PRESENT Decrypt",
+                args: [
+                    { string: "00112233445566778899", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Hex", "Raw", "PKCS5"
+                ]
+            }
+        ]
+    },
+    {
+        name: "PRESENT Round-trip: CBC 80-bit key, long message",
+        input: "The quick brown fox jumps over the lazy dog",
+        expectedOutput: "The quick brown fox jumps over the lazy dog",
+        recipeConfig: [
+            {
+                op: "PRESENT Encrypt",
+                args: [
+                    { string: "aabbccddeeff00112233", option: "Hex" },
+                    { string: "0011223344556677", option: "Hex" },
+                    "CBC", "Raw", "Hex", "PKCS5"
+                ]
+            },
+            {
+                op: "PRESENT Decrypt",
+                args: [
+                    { string: "aabbccddeeff00112233", option: "Hex" },
+                    { string: "0011223344556677", option: "Hex" },
+                    "CBC", "Hex", "Raw", "PKCS5"
+                ]
+            }
+        ]
+    },
+    {
+        name: "PRESENT Round-trip: ECB 128-bit key",
+        input: "Testing PRESENT cipher with 128-bit key",
+        expectedOutput: "Testing PRESENT cipher with 128-bit key",
+        recipeConfig: [
+            {
+                op: "PRESENT Encrypt",
+                args: [
+                    { string: "00112233445566778899aabbccddeeff", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Raw", "Hex", "PKCS5"
+                ]
+            },
+            {
+                op: "PRESENT Decrypt",
+                args: [
+                    { string: "00112233445566778899aabbccddeeff", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Hex", "Raw", "PKCS5"
+                ]
+            }
+        ]
+    },
+    {
+        name: "PRESENT Round-trip: CBC 128-bit key",
+        input: "PRESENT is an ultra-lightweight block cipher!",
+        expectedOutput: "PRESENT is an ultra-lightweight block cipher!",
+        recipeConfig: [
+            {
+                op: "PRESENT Encrypt",
+                args: [
+                    { string: "ffeeddccbbaa99887766554433221100", option: "Hex" },
+                    { string: "8877665544332211", option: "Hex" },
+                    "CBC", "Raw", "Hex", "PKCS5"
+                ]
+            },
+            {
+                op: "PRESENT Decrypt",
+                args: [
+                    { string: "ffeeddccbbaa99887766554433221100", option: "Hex" },
+                    { string: "8877665544332211", option: "Hex" },
+                    "CBC", "Hex", "Raw", "PKCS5"
+                ]
+            }
+        ]
+    },
+    {
+        name: "PRESENT Round-trip: UTF8 key (10 bytes)",
+        input: "Secret message",
+        expectedOutput: "Secret message",
+        recipeConfig: [
+            {
+                op: "PRESENT Encrypt",
+                args: [
+                    { string: "mypassword", option: "UTF8" },
+                    { string: "initvect", option: "UTF8" },
+                    "CBC", "Raw", "Hex", "PKCS5"
+                ]
+            },
+            {
+                op: "PRESENT Decrypt",
+                args: [
+                    { string: "mypassword", option: "UTF8" },
+                    { string: "initvect", option: "UTF8" },
+                    "CBC", "Hex", "Raw", "PKCS5"
+                ]
+            }
+        ]
+    },
+
+    // Encryption consistency tests - verify same input always produces same output
+    {
+        name: "PRESENT Encrypt: 80-bit zero key consistency",
+        input: "TestData",
+        expectedOutput: "b78cfea5ffcd89f265585a6ce7312131",
+        recipeConfig: [
+            {
+                op: "PRESENT Encrypt",
+                args: [
+                    { string: "00000000000000000000", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Raw", "Hex", "PKCS5"
+                ]
+            }
+        ]
+    },
+    {
+        name: "PRESENT Encrypt: 128-bit zero key consistency",
+        input: "TestData",
+        expectedOutput: "e127a24e38de2c36407e794ef5dffefd",
+        recipeConfig: [
+            {
+                op: "PRESENT Encrypt",
+                args: [
+                    { string: "00000000000000000000000000000000", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Raw", "Hex", "PKCS5"
+                ]
+            }
+        ]
+    },
+    {
+        name: "PRESENT Round-trip: Various lengths 1 byte",
+        input: "A",
+        expectedOutput: "A",
+        recipeConfig: [
+            {
+                op: "PRESENT Encrypt",
+                args: [
+                    { string: "00112233445566778899", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Raw", "Hex", "PKCS5"
+                ]
+            },
+            {
+                op: "PRESENT Decrypt",
+                args: [
+                    { string: "00112233445566778899", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Hex", "Raw", "PKCS5"
+                ]
+            }
+        ]
+    },
+    {
+        name: "PRESENT Round-trip: Various lengths 7 bytes",
+        input: "1234567",
+        expectedOutput: "1234567",
+        recipeConfig: [
+            {
+                op: "PRESENT Encrypt",
+                args: [
+                    { string: "00112233445566778899", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Raw", "Hex", "PKCS5"
+                ]
+            },
+            {
+                op: "PRESENT Decrypt",
+                args: [
+                    { string: "00112233445566778899", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Hex", "Raw", "PKCS5"
+                ]
+            }
+        ]
+    },
+    {
+        name: "PRESENT Round-trip: Various lengths 8 bytes (exact block)",
+        input: "12345678",
+        expectedOutput: "12345678",
+        recipeConfig: [
+            {
+                op: "PRESENT Encrypt",
+                args: [
+                    { string: "00112233445566778899", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Raw", "Hex", "PKCS5"
+                ]
+            },
+            {
+                op: "PRESENT Decrypt",
+                args: [
+                    { string: "00112233445566778899", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Hex", "Raw", "PKCS5"
+                ]
+            }
+        ]
+    },
+    {
+        name: "PRESENT Round-trip: Various lengths 9 bytes",
+        input: "123456789",
+        expectedOutput: "123456789",
+        recipeConfig: [
+            {
+                op: "PRESENT Encrypt",
+                args: [
+                    { string: "00112233445566778899", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Raw", "Hex", "PKCS5"
+                ]
+            },
+            {
+                op: "PRESENT Decrypt",
+                args: [
+                    { string: "00112233445566778899", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Hex", "Raw", "PKCS5"
+                ]
+            }
+        ]
+    },
+    {
+        name: "PRESENT Round-trip: Various lengths 16 bytes (two blocks)",
+        input: "1234567890ABCDEF",
+        expectedOutput: "1234567890ABCDEF",
+        recipeConfig: [
+            {
+                op: "PRESENT Encrypt",
+                args: [
+                    { string: "00112233445566778899", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Raw", "Hex", "PKCS5"
+                ]
+            },
+            {
+                op: "PRESENT Decrypt",
+                args: [
+                    { string: "00112233445566778899", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Hex", "Raw", "PKCS5"
+                ]
+            }
+        ]
+    },
+    {
+        name: "PRESENT Round-trip: Binary data",
+        input: "\x00\x01\x02\x03\x04\x05\x06\x07",
+        expectedOutput: "\x00\x01\x02\x03\x04\x05\x06\x07",
+        recipeConfig: [
+            {
+                op: "PRESENT Encrypt",
+                args: [
+                    { string: "ffeeddccbbaa99887766", option: "Hex" },
+                    { string: "0011223344556677", option: "Hex" },
+                    "CBC", "Raw", "Hex", "PKCS5"
+                ]
+            },
+            {
+                op: "PRESENT Decrypt",
+                args: [
+                    { string: "ffeeddccbbaa99887766", option: "Hex" },
+                    { string: "0011223344556677", option: "Hex" },
+                    "CBC", "Hex", "Raw", "PKCS5"
+                ]
+            }
+        ]
+    }
+]);

tests/operations/tests/Twofish.mjs

@@ -0,0 +1,486 @@
+/**
+ * Twofish cipher tests.
+ *
+ * Test vectors from the official Twofish paper:
+ * https://www.schneier.com/academic/twofish/
+ *
+ * Note: PKCS5 padding adds an extra block when input is exactly block-aligned.
+ * Round-trip tests verify correct encryption/decryption behavior.
+ *
+ * @author Medjedtxm
+ * @copyright Crown Copyright 2026
+ * @license Apache-2.0
+ */
+
+import TestRegister from "../../lib/TestRegister.mjs";
+
+TestRegister.addTests([
+    // ============================================================
+    // OFFICIAL TEST VECTORS from Bruce Schneier's Twofish paper:
+    // https://www.schneier.com/academic/twofish/
+    // https://www.schneier.com/wp-content/uploads/2015/12/ecb_ival.txt
+    // ============================================================
+    {
+        name: "Twofish Official Vector: 128-bit zero key, zero plaintext",
+        input: "00000000000000000000000000000000",
+        expectedOutput: "9f589f5cf6122c32b6bfec2f2ae8c35a",
+        recipeConfig: [
+            {
+                op: "Twofish Encrypt",
+                args: [
+                    { string: "00000000000000000000000000000000", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Hex", "Hex", "NO"
+                ]
+            }
+        ]
+    },
+    {
+        name: "Twofish Official Vector: 192-bit zero key, zero plaintext",
+        input: "00000000000000000000000000000000",
+        expectedOutput: "efa71f788965bd4453f860178fc19101",
+        recipeConfig: [
+            {
+                op: "Twofish Encrypt",
+                args: [
+                    { string: "000000000000000000000000000000000000000000000000", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Hex", "Hex", "NO"
+                ]
+            }
+        ]
+    },
+    {
+        name: "Twofish Official Vector: 256-bit zero key, zero plaintext",
+        input: "00000000000000000000000000000000",
+        expectedOutput: "57ff739d4dc92c1bd7fc01700cc8216f",
+        recipeConfig: [
+            {
+                op: "Twofish Encrypt",
+                args: [
+                    { string: "0000000000000000000000000000000000000000000000000000000000000000", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Hex", "Hex", "NO"
+                ]
+            }
+        ]
+    },
+    // Decrypt verification of official vectors
+    {
+        name: "Twofish Official Vector Decrypt: 128-bit zero key",
+        input: "9f589f5cf6122c32b6bfec2f2ae8c35a",
+        expectedOutput: "00000000000000000000000000000000",
+        recipeConfig: [
+            {
+                op: "Twofish Decrypt",
+                args: [
+                    { string: "00000000000000000000000000000000", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Hex", "Hex", "NO"
+                ]
+            }
+        ]
+    },
+    // ============================================================
+    // Round-trip tests for ECB mode with various key sizes
+    // ============================================================
+    {
+        name: "Twofish Round-trip: ECB 128-bit key",
+        input: "Hello, World!!!",
+        expectedOutput: "Hello, World!!!",
+        recipeConfig: [
+            {
+                op: "Twofish Encrypt",
+                args: [
+                    { string: "00112233445566778899aabbccddeeff", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Raw", "Hex", "PKCS5"
+                ]
+            },
+            {
+                op: "Twofish Decrypt",
+                args: [
+                    { string: "00112233445566778899aabbccddeeff", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Hex", "Raw", "PKCS5"
+                ]
+            }
+        ]
+    },
+    {
+        name: "Twofish Round-trip: ECB 192-bit key",
+        input: "Testing Twofish with 192-bit key",
+        expectedOutput: "Testing Twofish with 192-bit key",
+        recipeConfig: [
+            {
+                op: "Twofish Encrypt",
+                args: [
+                    { string: "000102030405060708090a0b0c0d0e0f1011121314151617", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Raw", "Hex", "PKCS5"
+                ]
+            },
+            {
+                op: "Twofish Decrypt",
+                args: [
+                    { string: "000102030405060708090a0b0c0d0e0f1011121314151617", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Hex", "Raw", "PKCS5"
+                ]
+            }
+        ]
+    },
+    {
+        name: "Twofish Round-trip: ECB 256-bit key",
+        input: "Testing Twofish with 256-bit key encryption",
+        expectedOutput: "Testing Twofish with 256-bit key encryption",
+        recipeConfig: [
+            {
+                op: "Twofish Encrypt",
+                args: [
+                    { string: "000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Raw", "Hex", "PKCS5"
+                ]
+            },
+            {
+                op: "Twofish Decrypt",
+                args: [
+                    { string: "000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Hex", "Raw", "PKCS5"
+                ]
+            }
+        ]
+    },
+
+    // Round-trip tests for CBC mode
+    {
+        name: "Twofish Round-trip: CBC 128-bit key",
+        input: "The quick brown fox jumps over the lazy dog",
+        expectedOutput: "The quick brown fox jumps over the lazy dog",
+        recipeConfig: [
+            {
+                op: "Twofish Encrypt",
+                args: [
+                    { string: "00112233445566778899aabbccddeeff", option: "Hex" },
+                    { string: "ffeeddccbbaa99887766554433221100", option: "Hex" },
+                    "CBC", "Raw", "Hex", "PKCS5"
+                ]
+            },
+            {
+                op: "Twofish Decrypt",
+                args: [
+                    { string: "00112233445566778899aabbccddeeff", option: "Hex" },
+                    { string: "ffeeddccbbaa99887766554433221100", option: "Hex" },
+                    "CBC", "Hex", "Raw", "PKCS5"
+                ]
+            }
+        ]
+    },
+    {
+        name: "Twofish Round-trip: CBC 192-bit key",
+        input: "Testing Twofish with 192-bit key in CBC mode",
+        expectedOutput: "Testing Twofish with 192-bit key in CBC mode",
+        recipeConfig: [
+            {
+                op: "Twofish Encrypt",
+                args: [
+                    { string: "000102030405060708090a0b0c0d0e0f1011121314151617", option: "Hex" },
+                    { string: "ffeeddccbbaa99887766554433221100", option: "Hex" },
+                    "CBC", "Raw", "Hex", "PKCS5"
+                ]
+            },
+            {
+                op: "Twofish Decrypt",
+                args: [
+                    { string: "000102030405060708090a0b0c0d0e0f1011121314151617", option: "Hex" },
+                    { string: "ffeeddccbbaa99887766554433221100", option: "Hex" },
+                    "CBC", "Hex", "Raw", "PKCS5"
+                ]
+            }
+        ]
+    },
+    {
+        name: "Twofish Round-trip: CBC 256-bit key",
+        input: "Testing Twofish with 256-bit key in CBC mode",
+        expectedOutput: "Testing Twofish with 256-bit key in CBC mode",
+        recipeConfig: [
+            {
+                op: "Twofish Encrypt",
+                args: [
+                    { string: "000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f", option: "Hex" },
+                    { string: "ffeeddccbbaa99887766554433221100", option: "Hex" },
+                    "CBC", "Raw", "Hex", "PKCS5"
+                ]
+            },
+            {
+                op: "Twofish Decrypt",
+                args: [
+                    { string: "000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f", option: "Hex" },
+                    { string: "ffeeddccbbaa99887766554433221100", option: "Hex" },
+                    "CBC", "Hex", "Raw", "PKCS5"
+                ]
+            }
+        ]
+    },
+
+    // Round-trip tests for CFB mode
+    {
+        name: "Twofish Round-trip: CFB 128-bit key",
+        input: "Testing Twofish CFB mode encryption",
+        expectedOutput: "Testing Twofish CFB mode encryption",
+        recipeConfig: [
+            {
+                op: "Twofish Encrypt",
+                args: [
+                    { string: "deadbeefcafebabe0123456789abcdef", option: "Hex" },
+                    { string: "0102030405060708090a0b0c0d0e0f10", option: "Hex" },
+                    "CFB", "Raw", "Hex", "PKCS5"
+                ]
+            },
+            {
+                op: "Twofish Decrypt",
+                args: [
+                    { string: "deadbeefcafebabe0123456789abcdef", option: "Hex" },
+                    { string: "0102030405060708090a0b0c0d0e0f10", option: "Hex" },
+                    "CFB", "Hex", "Raw", "PKCS5"
+                ]
+            }
+        ]
+    },
+
+    // Round-trip tests for OFB mode
+    {
+        name: "Twofish Round-trip: OFB 128-bit key",
+        input: "Testing Twofish OFB mode encryption",
+        expectedOutput: "Testing Twofish OFB mode encryption",
+        recipeConfig: [
+            {
+                op: "Twofish Encrypt",
+                args: [
+                    { string: "00112233445566778899aabbccddeeff", option: "Hex" },
+                    { string: "ffeeddccbbaa99887766554433221100", option: "Hex" },
+                    "OFB", "Raw", "Hex", "PKCS5"
+                ]
+            },
+            {
+                op: "Twofish Decrypt",
+                args: [
+                    { string: "00112233445566778899aabbccddeeff", option: "Hex" },
+                    { string: "ffeeddccbbaa99887766554433221100", option: "Hex" },
+                    "OFB", "Hex", "Raw", "PKCS5"
+                ]
+            }
+        ]
+    },
+
+    // Round-trip tests for CTR mode
+    {
+        name: "Twofish Round-trip: CTR 128-bit key",
+        input: "Testing Twofish CTR mode encryption",
+        expectedOutput: "Testing Twofish CTR mode encryption",
+        recipeConfig: [
+            {
+                op: "Twofish Encrypt",
+                args: [
+                    { string: "00112233445566778899aabbccddeeff", option: "Hex" },
+                    { string: "00000000000000000000000000000001", option: "Hex" },
+                    "CTR", "Raw", "Hex", "PKCS5"
+                ]
+            },
+            {
+                op: "Twofish Decrypt",
+                args: [
+                    { string: "00112233445566778899aabbccddeeff", option: "Hex" },
+                    { string: "00000000000000000000000000000001", option: "Hex" },
+                    "CTR", "Hex", "Raw", "PKCS5"
+                ]
+            }
+        ]
+    },
+
+    // UTF8 key tests
+    {
+        name: "Twofish Round-trip: UTF8 key (16 bytes)",
+        input: "Secret message!",
+        expectedOutput: "Secret message!",
+        recipeConfig: [
+            {
+                op: "Twofish Encrypt",
+                args: [
+                    { string: "MySecretPassword", option: "UTF8" },
+                    { string: "InitVectorHere!!", option: "UTF8" },
+                    "CBC", "Raw", "Hex", "PKCS5"
+                ]
+            },
+            {
+                op: "Twofish Decrypt",
+                args: [
+                    { string: "MySecretPassword", option: "UTF8" },
+                    { string: "InitVectorHere!!", option: "UTF8" },
+                    "CBC", "Hex", "Raw", "PKCS5"
+                ]
+            }
+        ]
+    },
+
+    // Various input length tests
+    {
+        name: "Twofish Round-trip: 1 byte input",
+        input: "A",
+        expectedOutput: "A",
+        recipeConfig: [
+            {
+                op: "Twofish Encrypt",
+                args: [
+                    { string: "00112233445566778899aabbccddeeff", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Raw", "Hex", "PKCS5"
+                ]
+            },
+            {
+                op: "Twofish Decrypt",
+                args: [
+                    { string: "00112233445566778899aabbccddeeff", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Hex", "Raw", "PKCS5"
+                ]
+            }
+        ]
+    },
+    {
+        name: "Twofish Round-trip: 15 byte input",
+        input: "123456789012345",
+        expectedOutput: "123456789012345",
+        recipeConfig: [
+            {
+                op: "Twofish Encrypt",
+                args: [
+                    { string: "00112233445566778899aabbccddeeff", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Raw", "Hex", "PKCS5"
+                ]
+            },
+            {
+                op: "Twofish Decrypt",
+                args: [
+                    { string: "00112233445566778899aabbccddeeff", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Hex", "Raw", "PKCS5"
+                ]
+            }
+        ]
+    },
+    {
+        name: "Twofish Round-trip: 16 byte input (exact block)",
+        input: "1234567890123456",
+        expectedOutput: "1234567890123456",
+        recipeConfig: [
+            {
+                op: "Twofish Encrypt",
+                args: [
+                    { string: "00112233445566778899aabbccddeeff", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Raw", "Hex", "PKCS5"
+                ]
+            },
+            {
+                op: "Twofish Decrypt",
+                args: [
+                    { string: "00112233445566778899aabbccddeeff", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Hex", "Raw", "PKCS5"
+                ]
+            }
+        ]
+    },
+    {
+        name: "Twofish Round-trip: 17 byte input",
+        input: "12345678901234567",
+        expectedOutput: "12345678901234567",
+        recipeConfig: [
+            {
+                op: "Twofish Encrypt",
+                args: [
+                    { string: "00112233445566778899aabbccddeeff", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Raw", "Hex", "PKCS5"
+                ]
+            },
+            {
+                op: "Twofish Decrypt",
+                args: [
+                    { string: "00112233445566778899aabbccddeeff", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Hex", "Raw", "PKCS5"
+                ]
+            }
+        ]
+    },
+    {
+        name: "Twofish Round-trip: 32 byte input (two blocks)",
+        input: "12345678901234567890123456789012",
+        expectedOutput: "12345678901234567890123456789012",
+        recipeConfig: [
+            {
+                op: "Twofish Encrypt",
+                args: [
+                    { string: "00112233445566778899aabbccddeeff", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Raw", "Hex", "PKCS5"
+                ]
+            },
+            {
+                op: "Twofish Decrypt",
+                args: [
+                    { string: "00112233445566778899aabbccddeeff", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Hex", "Raw", "PKCS5"
+                ]
+            }
+        ]
+    },
+
+    // Binary data test
+    {
+        name: "Twofish Round-trip: Binary data",
+        input: "\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f",
+        expectedOutput: "\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f",
+        recipeConfig: [
+            {
+                op: "Twofish Encrypt",
+                args: [
+                    { string: "ffeeddccbbaa99887766554433221100", option: "Hex" },
+                    { string: "00112233445566778899aabbccddeeff", option: "Hex" },
+                    "CBC", "Raw", "Hex", "PKCS5"
+                ]
+            },
+            {
+                op: "Twofish Decrypt",
+                args: [
+                    { string: "ffeeddccbbaa99887766554433221100", option: "Hex" },
+                    { string: "00112233445566778899aabbccddeeff", option: "Hex" },
+                    "CBC", "Hex", "Raw", "PKCS5"
+                ]
+            }
+        ]
+    },
+
+    // Consistency test - same input should always produce same output
+    {
+        name: "Twofish Encrypt: 128-bit key consistency test",
+        input: "TestData12345678",
+        expectedOutput: "8aed2d3a85dc3e0b663ba1fe1fdaf056771d591428af301d69fa1e227d083527",
+        recipeConfig: [
+            {
+                op: "Twofish Encrypt",
+                args: [
+                    { string: "00000000000000000000000000000000", option: "Hex" },
+                    { string: "", option: "Hex" },
+                    "ECB", "Raw", "Hex", "PKCS5"
+                ]
+            }
+        ]
+    }
+]);