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Merge #1002: BIP155: Mention SHA3-256 explicitly

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6ef71b344c51aebe1dab5ac47f87d8f926462a65 BIP155: Small text improvements (Hennadii Stepanov)
562f1d71883d1daa0dd5f438d25986fb18465800 BIP155: Mention SHA3-256 explicitly (Hennadii Stepanov)

Pull request description:

  It seems better to clarify that `CHECKSUM` in Tor onion v3 address uses SHA3-256 hash function.

ACKs for top commit:
  vasild:
    ACK 6ef71b344
  laanwj:
    ACK 6ef71b344c51aebe1dab5ac47f87d8f926462a65

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This commit is contained in:
Wladimir J. van der Laan 2020-10-06 15:51:19 +02:00
commit ebeb28ee0e
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1 changed files with 4 additions and 3 deletions
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bip-0155.mediawiki
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@ -164,10 +164,11 @@ onion_address = base32(PUBKEY | CHECKSUM | VERSION) + ".onion"
CHECKSUM = H(".onion checksum" | PUBKEY | VERSION)[:2] CHECKSUM = H(".onion checksum" | PUBKEY | VERSION)[:2]
where: where:
- PUBKEY is the 32 bytes ed25519 master pubkey of the hidden service. - PUBKEY is the 32 bytes ed25519 master pubkey of the hidden service
- VERSION is an one byte version field (default value '\x03') - VERSION is a one byte version field (default value '\x03')
- ".onion checksum" is a constant string - ".onion checksum" is a constant string
- CHECKSUM is truncated to two bytes before inserting it in onion_address - CHECKSUM is truncated to two bytes before inserting it in onion_address
- H() is the SHA3-256 cryptographic hash function
</pre> </pre>
Tor v3 addresses MUST be sent with the <code>TORV3</code> network ID, with the 32-byte PUBKEY part in the address field. As VERSION will always be '\x03' in the case of v3 addresses, this is enough to reconstruct the onion address. Tor v3 addresses MUST be sent with the <code>TORV3</code> network ID, with the 32-byte PUBKEY part in the address field. As VERSION will always be '\x03' in the case of v3 addresses, this is enough to reconstruct the onion address.