From 7b36064c90c377d07d30904318d6cbfe5a133af1 Mon Sep 17 00:00:00 2001 From: "Daniel P. Berrange" Date: Fri, 23 Oct 2015 16:14:50 +0100 Subject: crypto: add ability to query hash digest len Add a qcrypto_hash_digest_len() method which allows querying of the raw digest size for a given hash algorithm. Reviewed-by: Eric Blake Signed-off-by: Daniel P. Berrange --- crypto/hash.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'crypto/hash.c') diff --git a/crypto/hash.c b/crypto/hash.c index 81e74de868..5a47b90ec0 100644 --- a/crypto/hash.c +++ b/crypto/hash.c @@ -30,6 +30,12 @@ static int qcrypto_hash_alg_map[QCRYPTO_HASH_ALG_LAST] = { [QCRYPTO_HASH_ALG_SHA256] = GNUTLS_DIG_SHA256, }; +static size_t qcrypto_hash_alg_size[QCRYPTO_HASH_ALG_LAST] = { + [QCRYPTO_HASH_ALG_MD5] = 16, + [QCRYPTO_HASH_ALG_SHA1] = 20, + [QCRYPTO_HASH_ALG_SHA256] = 32, +}; + gboolean qcrypto_hash_supports(QCryptoHashAlgorithm alg) { if (alg < G_N_ELEMENTS(qcrypto_hash_alg_map)) { @@ -38,6 +44,15 @@ gboolean qcrypto_hash_supports(QCryptoHashAlgorithm alg) return false; } +size_t qcrypto_hash_digest_len(QCryptoHashAlgorithm alg) +{ + if (alg >= G_N_ELEMENTS(qcrypto_hash_alg_size)) { + return 0; + } + return qcrypto_hash_alg_size[alg]; +} + + int qcrypto_hash_bytesv(QCryptoHashAlgorithm alg, const struct iovec *iov, size_t niov, -- cgit v1.2.3