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| -rw-r--r-- | include/olm/utility.hh | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/olm/utility.hh b/include/olm/utility.hh index 241d7e0..5329a59 100644 --- a/include/olm/utility.hh +++ b/include/olm/utility.hh @@ -31,13 +31,22 @@ struct Utility { ErrorCode last_error; + /** The length of a SHA-256 hash in bytes. */ std::size_t sha256_length(); + /** Compute a SHA-256 hash. Returns the length of the SHA-256 hash in bytes + * on success. Returns std::size_t(-1) on failure. On failure last_error + * will be set with an error code. If the output buffer was too small then + * last error will be OUTPUT_BUFFER_TOO_SMALL. */ std::size_t sha256( std::uint8_t const * input, std::size_t input_length, std::uint8_t * output, std::size_t output_length ); + /** Verify a ed25519 signature. Returns std::size_t(0) on success. Returns + * std::size_t(-1) on failure or if the signature was invalid. On failure + * last_error will be set with an error code. If the signature was too short + * or was not a valid signature then last_error will be BAD_MESSAGE_MAC. */ std::size_t ed25519_verify( Ed25519PublicKey const & key, std::uint8_t const * message, std::size_t message_length, |