208 lines
6.2 KiB
Markdown
208 lines
6.2 KiB
Markdown
# AWS Payment Cryptography Recipe Coverage
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This guide maps AWS Payment Cryptography Data Plane operations to the current payment-facing CyberChef surface.
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Source baseline:
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- AWS Payment Cryptography Data Plane API Reference: https://docs.aws.amazon.com/payment-cryptography/latest/DataAPIReference/Welcome.html
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- AWS Data Plane actions list: https://docs.aws.amazon.com/payment-cryptography/latest/DataAPIReference/API_Operations.html
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Coverage legend:
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- `Direct`: there is a payment-facing operation or straightforward recipe chain for the software-emulation shape of the AWS action
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- `Chained`: there is no single operation, but the flow is cleanly achievable by chaining existing operations
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- `Emulated`: there is a dedicated operation, but the inline comments call out simplifications versus AWS or HSM custody semantics
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## Coverage Summary
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| AWS operation | Coverage | Use |
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| --- | --- | --- |
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| `EncryptData` | `Direct` | `Encrypt Payment Data` |
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| `DecryptData` | `Direct` | `Decrypt Payment Data` |
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| `ReEncryptData` | `Direct` | `Re-Encrypt Payment Data` |
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| `GenerateMac` | `Direct` | `Generate Payment MAC` or `Generate EMV MAC` |
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| `VerifyMac` | `Direct` | `Verify Payment MAC` or `Verify EMV MAC` |
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| `VerifyAuthRequestCryptogram` | `Direct` | `Verify EMV ARQC` |
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| `GenerateCardValidationData` | `Direct` | `Generate Card Validation Data` |
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| `VerifyCardValidationData` | `Direct` | `Verify Card Validation Data` |
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| `GeneratePinData` | `Direct` / `Chained` | `Generate Payment PIN Data`, `Generate IBM 3624 PIN Offset`, `Generate VISA PVV` |
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| `TranslatePinData` | `Direct` / `Chained` | `Translate Payment PIN Data` or clear PIN block plus cipher chaining |
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| `VerifyPinData` | `Direct` | `Verify Payment PIN Data`, `Verify IBM 3624 PIN`, `Verify VISA PVV` |
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| `TranslateKeyMaterial` | `Chained` | `Derive ECDH Key Material` + wrap/unwrap + TR-31/TR-34 helpers |
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| `GenerateAs2805KekValidation` | `Emulated` | `Generate AS2805 KEK Validation` |
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| `GenerateMacEmvPinChange` | `Direct` / `Emulated` | `Generate EMV MAC For PIN Change` |
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## AWS `EncryptData`
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Preferred operation:
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- `Encrypt Payment Data`
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Good chain:
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- `Derive DUKPT Key` -> `Triple DES Encrypt`
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- `Derive ECDH Key Material` -> KDF if needed -> `AES Encrypt`
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Notes:
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- use the payment wrapper when you want payment terminology in one operation
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- use the generic ciphers directly when you need fine-grained mode control
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## AWS `DecryptData`
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Preferred operation:
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- `Decrypt Payment Data`
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Good chain:
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- `Derive DUKPT Key` -> `Triple DES Decrypt`
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- `Derive ECDH Key Material` -> KDF if needed -> `AES Decrypt`
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## AWS `ReEncryptData`
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Preferred operation:
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- `Re-Encrypt Payment Data`
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Good chain:
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- `Decrypt Payment Data` -> `Encrypt Payment Data`
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## AWS `GenerateMac`
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Preferred operations:
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- `Generate Payment MAC`
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- `Generate EMV MAC`
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Current MAC coverage:
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- HMAC SHA-224 / 256 / 384 / 512
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- AES-CMAC
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- TDES-CMAC
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- ISO 9797-1 Algorithm 1
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- ISO 9797-1 Algorithm 3
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- AS2805-4.1
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- DUKPT TDES-CMAC
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- DUKPT ISO 9797-1 Algorithm 1
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- DUKPT ISO 9797-1 Algorithm 3
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- EMV retail-MAC style generation with a provided session key
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Use `Generate EMV MAC` when:
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- the AWS flow is EMV-session-key based rather than a static or DUKPT MAC key
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## AWS `VerifyMac`
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Preferred operations:
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- `Verify Payment MAC`
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- `Verify EMV MAC`
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Use the same method, padding rule, and key context as generation.
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## AWS `VerifyAuthRequestCryptogram`
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Preferred operation:
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- `Verify EMV ARQC`
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Good chain:
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- preassemble the ARQC input block
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- derive or supply the session key
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- verify the ARQC
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Important assumption:
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- current ARQC / ARPC support is the implemented AES-CMAC profile
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## AWS `GenerateCardValidationData`
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Preferred operation:
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- `Generate Card Validation Data`
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Profiles:
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- CVV / CVC
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- CVV2 / CVC2
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- iCVV
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## AWS `VerifyCardValidationData`
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Preferred operation:
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- `Verify Card Validation Data`
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## AWS `GeneratePinData`
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Preferred operations:
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- `Generate Payment PIN Data`
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- `Generate IBM 3624 PIN Offset`
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- `Generate VISA PVV`
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Use:
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- `Generate Payment PIN Data` for clear ISO format `0`, `1`, and `3` PIN blocks
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- `Generate IBM 3624 PIN Offset` for issuer-host offset workflows
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- `Generate VISA PVV` for PVV workflows
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Good chains:
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- clear PIN -> `Generate Payment PIN Data` -> `Encrypt Payment Data`
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- clear PIN -> `Generate IBM 3624 PIN Offset`
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- clear PIN -> `Generate VISA PVV`
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## AWS `TranslatePinData`
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Preferred operation:
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- `Translate Payment PIN Data`
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Good chains:
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- `Parse PIN Block` -> inspect -> `Translate PIN Block`
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- `Decrypt Payment Data` -> `Translate Payment PIN Data` -> `Encrypt Payment Data`
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Important assumption:
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- the direct wrapper is for clear ISO PIN-block translation
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- encrypted-key-custody semantics are still emulated by chaining
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## AWS `VerifyPinData`
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Preferred operations:
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- `Verify Payment PIN Data`
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- `Verify IBM 3624 PIN`
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- `Verify VISA PVV`
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Use:
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- `Verify Payment PIN Data` for clear ISO PIN blocks
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- `Verify IBM 3624 PIN` for issuer offset checks
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- `Verify VISA PVV` for PVV checks
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## AWS `TranslateKeyMaterial`
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Preferred chain:
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- `Derive ECDH Key Material`
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- KDF if needed
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- `AES Key Wrap` or `AES Key Unwrap`
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- `Parse TR-31 key block`
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- `Parse TR-34 B9 envelope`
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Important assumption:
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- this is a recipe chain, not a single HSM-like rewrap boundary
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## AWS `GenerateAs2805KekValidation`
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Preferred operation:
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- `Generate AS2805 KEK Validation`
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Important assumption:
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- this is an explicit software emulation helper
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- the operation comments call out that it does not claim exact HSM-side AS2805 node-initialization behavior
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## AWS `GenerateMacEmvPinChange`
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Preferred operation:
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- `Generate EMV MAC For PIN Change`
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Good chain:
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- build or obtain the encrypted target PIN block
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- assemble the issuer-script APDU body
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- generate the PIN-change MAC
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Important assumption:
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- the helper expects the new PIN block to already be encrypted
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## Common Chains
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## A) DUKPT Request MAC
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- `Generate Payment MAC`
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Method:
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- `DUKPT MAC Request CMAC`
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- or `DUKPT ISO 9797-1 Algorithm 1`
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- or `DUKPT ISO 9797-1 Algorithm 3`
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## B) EMV Issuer Script MAC
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- `Generate EMV MAC`
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- `Verify EMV MAC`
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## C) EMV PIN Change
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- `Generate EMV MAC For PIN Change`
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## D) Clear PIN To Encrypted PIN Data
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- `Generate Payment PIN Data`
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- `Encrypt Payment Data`
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## E) ECDH-Based Key Translation Lab Flow
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- `Derive ECDH Key Material`
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- `AES Key Unwrap`
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- `AES Key Wrap`
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- `Parse TR-31 key block`
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