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Add several rows and columns to warc-specification hash digest table #89

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Jul 17, 2023
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Add several rows and columns to warc-specification hash digest table #89

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Add several rows and columns to hash digest table 
add columns regarding cryptographic security
add rows for the fast XXH3, XXH128 hases
add rows for the secure BLAKE3 hash
@chris-ha458
chris-ha458 authored Jul 17, 2023

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commit b61df16352bdfd30161f354f02bca64c98bcf101
35 changes: 19 additions & 16 deletions specifications/warc-format/warc-1.1-annotated/index.md
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Original file line number Diff line number Diff line change
@@ -623,22 +623,25 @@ Any record may have a WARC-Block-Digest field.
> * Accept both uppercase and lowercase ASCII letters when decoding
> Base16 or Base32.
>
> | Algorithm | Label | Compat. label | Typical encoding | Base16 length | Base32 length |
> |-----------|-------------|---------------|--------------------|-------------------|-------------------|
> | MD5 | `md5:` | | lowercase Base16 | 32 | 32 |
> | SHA-1 | `sha1:` | `sha-1:` | uppercase Base32 | 40 | 32 |
> | SHA-224 | `sha224:` | `sha-224:` | | 56 | 48 |
> | SHA-256 | `sha256:` | `sha-256:` | lowercase Base16 | 64 | 56 |
> | SHA-384 | `sha384:` | `sha-384:` | | 96 | 80 |
> | SHA-512 | `sha512:` | `sha-512:` | | 128 | 104 |
> | SHA-512/224 | `sha512-224:` | | | 56 | 48 |
> | SHA-512/256 | `sha512-256:` | | | 64 | 56 |
> | SHA3-224 | `sha3-224:` | | | 56 | 48 |
> | SHA3-256 | `sha3-256:` | | | 64 | 56 |
> | SHA3-384 | `sha3-384:` | | | 96 | 80 |
> | SHA3-512 | `sha3-512:` | | | 128 | 104 |
> | BLAKE2s | `blake2s:` | | | 64 | 56 |
> | BLAKE2b | `blake2b:` | | | 128 | 104 |
> | Algorithm | Label | Compat. label | Typical encoding | Base16 length | Base32 length | Cryptographic
> |-----------|-------------|---------------|--------------------|-------------------|-------------------|-------------|
> | MD5 | `md5:` | | lowercase Base16 | 32 | 32 | Yes, but broken.
> | SHA-1 | `sha1:` | `sha-1:` | uppercase Base32 | 40 | 32 | Yes, but broken.
> | XXH3 | `xxh3:` | | 16 | | | No, but really fast
> | XXH128 | `xxh128:` | | 32 | | | No, but really fast
> | SHA-224 | `sha224:` | `sha-224:` | | 56 | 48 | Yes
> | SHA-256 | `sha256:` | `sha-256:` | lowercase Base16 | 64 | 56 | Yes, but vulnerable to length extension
> | SHA-384 | `sha384:` | `sha-384:` | | 96 | 80 | Yes
> | SHA-512 | `sha512:` | `sha-512:` | | 128 | 104 | Yes, but vulnerable to length extension
> | SHA-512/224 | `sha512-224:` | | | 56 | 48 | Yes
> | SHA-512/256 | `sha512-256:` | | | 64 | 56 | Yes
> | SHA3-224 | `sha3-224:` | | | 56 | 48 | Yes
> | SHA3-256 | `sha3-256:` | | | 64 | 56 | Yes
> | SHA3-384 | `sha3-384:` | | | 96 | 80 | Yes
> | SHA3-512 | `sha3-512:` | | | 128 | 104 | Yes
> | BLAKE2s | `blake2s:` | | | 64 | 56 | Yes
> | BLAKE2b | `blake2b:` | | | 128 | 104 | Yes
> | BLAKE3 | `blake3:` | | | 64 | | Yes, and really fast

WARC-Payload-Digest