mirrors/qemu
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

crypto/hash-glib: Implement new hash API

Browse Source 
Implements the new hashing API in the GLib hash driver.
Supports creating/destroying a context, updating the context
with input data and obtaining an output hash.

Signed-off-by: Alejandro Zeise <alejandro.zeise@seagate.com>
[ clg: - Dropped qcrypto_hash_supports() in qcrypto_glib_hash_new()
       - Removed superfluous cast (GChecksum *) in qcrypto_glib_hash_free()
       - Reworked qcrypto_glib_hash_finalize() ]
Signed-off-by: Cédric Le Goater <clg@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This commit is contained in:
Alejandro Zeise 2024-10-08 09:57:09 +02:00 committed by Daniel P. Berrangé
parent 190feb4884
commit c6ccd2af60
1 changed files with 67 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

67
crypto/hash-glib.c
View File

@ -1,6 +1,7 @@
/*
* QEMU Crypto hash algorithms
*
* Copyright (c) 2024 Seagate Technology LLC and/or its Affiliates
* Copyright (c) 2016 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
@ -95,6 +96,72 @@ qcrypto_glib_hash_bytesv(QCryptoHashAlgo alg,
}
static
QCryptoHash *qcrypto_glib_hash_new(QCryptoHashAlgo alg,
Error **errp)
{
QCryptoHash *hash;
hash = g_new(QCryptoHash, 1);
hash->alg = alg;
hash->opaque = g_checksum_new(qcrypto_hash_alg_map[alg]);
return hash;
}
static
void qcrypto_glib_hash_free(QCryptoHash *hash)
{
if (hash->opaque) {
g_checksum_free(hash->opaque);
}
g_free(hash);
}
static
int qcrypto_glib_hash_update(QCryptoHash *hash,
const struct iovec *iov,
size_t niov,
Error **errp)
{
GChecksum *ctx = hash->opaque;
for (int i = 0; i < niov; i++) {
g_checksum_update(ctx, iov[i].iov_base, iov[i].iov_len);
}
return 0;
}
static
int qcrypto_glib_hash_finalize(QCryptoHash *hash,
uint8_t **result,
size_t *result_len,
Error **errp)
{
int ret;
GChecksum *ctx = hash->opaque;
ret = g_checksum_type_get_length(qcrypto_hash_alg_map[hash->alg]);
if (ret < 0) {
error_setg(errp, "Unable to get hash length");
*result_len = 0;
return -1;
}
*result_len = ret;
*result = g_new(uint8_t, *result_len);
g_checksum_get_digest(ctx, *result, result_len);
return 0;
}
QCryptoHashDriver qcrypto_hash_lib_driver = {
.hash_bytesv = qcrypto_glib_hash_bytesv,
.hash_new = qcrypto_glib_hash_new,
.hash_update = qcrypto_glib_hash_update,
.hash_finalize = qcrypto_glib_hash_finalize,
.hash_free = qcrypto_glib_hash_free,
};