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Crypto appendix: allow HMAC-SHA-1 #2399

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Nov 22, 2024
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Crypto appendix: allow HMAC-SHA-1 #2399

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Crypto appendix: allow HMAC-SHA-1
Nov 21, 2024
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Merge branch 'master' into crypto-hmac-sha1
tghosth Nov 22, 2024
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7 changes: 5 additions & 2 deletions 5.0/en/0x97-Appendix-V_Cryptography.md
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Expand Up @@ -240,15 +240,18 @@ The following MAC algorithms are approved for use in securing messages by provid
| HMAC-SHA-512 | [RFC 2104](https://www.rfc-editor.org/info/rfc2104) & [FIPS 198-1](https://csrc.nist.gov/pubs/fips/198-1/final) | ✓ | | ✓ | ✓ |
| KMAC128 | [NIST SP 800-185](https://csrc.nist.gov/pubs/sp/800/185/final) | ✓ | ✓ | ✓ | ✓ |
| KMAC256 | [NIST SP 800-185](https://csrc.nist.gov/pubs/sp/800/185/final) | ✓ | ✓ | ✓ | ✓ |
| HMAC-SHA-1 | [RFC 2104](https://www.rfc-editor.org/info/rfc2104) & [FIPS 198-1](https://csrc.nist.gov/pubs/fips/198-1/final) | ✓ | | ✓ | ✓ |

Note that while SHA-1 should not be used in general, the usage of HMAC-SHA-1 is currently not considered to be problematic
([NIST SP 800-57](https://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-57pt1r5.pdf)).

### Disallowed MAC Algorithms

The following algorithms are explicitly banned and MUST NOT be used due to known vulnerabilities or insufficient security strength:

| MAC Algorithm | Reference |
| ---------------- | ---------------------------------------------------------------------------------- |
| MD5-based HMAC | [RFC 1321](https://www.rfc-editor.org/info/rfc1321) |
| SHA-1-based HMAC | [RFC 3174](https://www.rfc-editor.org/info/rfc3174) & [RFC 6194](https://www.rfc-editor.org/info/rfc6194) |
| HMAC-MD5 | [RFC 1321](https://www.rfc-editor.org/info/rfc1321) |

## Digital Signatures

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