 Identifiers and Test Vectors for HMAC-SHA-224, HMAC-SHA-256, HMAC-SHA-384, and HMAC-SHA-512 (RFC 4231)

ID: identifiers-and-test-vectors-for-hmac-sha-224-hmac-sha-256-hmac-sha-384-and-hmac-sha-512-rfc-4231

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Identifiers and Test Vectors for HMAC-SHA-224, HMAC-SHA-256, HMAC-SHA-384, and HMAC-SHA-512 (RFC 4231) by

Codex  0 2026-11-05

datatracker.ietf.org/doc/html/rfc4231

December2005. The title-page byline is M.Nystrom; Author’s Address onp.8 gives Magnus Nystrom. Section4.2, Test Case1, specifies a20-byte key consisting of hexadecimal0b bytes, ASCII message Hi There, and the HMAC-SHA-256 output. Section4.4 states the64-byte block size of SHA-256.

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