@@ -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,
@@ -44,6 +44,17 @@ typedef enum {
*/
gboolean qcrypto_hash_supports(QCryptoHashAlgorithm alg);
+
+/**
+ * qcrypto_hash_digest_len:
+ * @alg: the hash algorithm
+ *
+ * Determine the size of the hash digest in bytes
+ *
+ * Returns: the digest length in bytes
+ */
+size_t qcrypto_hash_digest_len(QCryptoHashAlgorithm alg);
+
/**
* qcrypto_hash_bytesv:
* @alg: the hash algorithm
@@ -163,6 +163,11 @@ static void test_hash_digest(void)
for (i = 0; i < G_N_ELEMENTS(expected_outputs) ; i++) {
int ret;
char *digest;
+ size_t digestsize;
+
+ digestsize = qcrypto_hash_digest_len(i);
+
+ g_assert((digestsize * 2) == strlen(expected_outputs[i]));
ret = qcrypto_hash_digest(i,
INPUT_TEXT,
Add a qcrypto_hash_digest_len() method which allows querying of the raw digest size for a given hash algorithm. Signed-off-by: Daniel P. Berrange <berrange@redhat.com> --- crypto/hash.c | 15 +++++++++++++++ include/crypto/hash.h | 11 +++++++++++ tests/test-crypto-hash.c | 5 +++++ 3 files changed, 31 insertions(+)