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| author | Daniel P. Berrange <berrange@redhat.com> | 2015-10-23 16:14:50 +0100 |
|---|---|---|
| committer | Daniel P. Berrange <berrange@redhat.com> | 2015-12-23 11:02:20 +0000 |
| commit | 7b36064c90c377d07d30904318d6cbfe5a133af1 (patch) | |
| tree | 4917e5ef7d40794be96dcd37db562d8917e21f2b /crypto | |
| parent | dd2bf9eb95f875f0ad6a15aecb48cfc8b739fcbc (diff) | |
| download | qemu-7b36064c90c377d07d30904318d6cbfe5a133af1.zip qemu-7b36064c90c377d07d30904318d6cbfe5a133af1.tar.gz qemu-7b36064c90c377d07d30904318d6cbfe5a133af1.tar.bz2 | |
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 <eblake@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Diffstat (limited to 'crypto')
| -rw-r--r-- | crypto/hash.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/crypto/hash.c b/crypto/hash.c index 81e74de..5a47b90 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, |