EVPCTX evp_init(int nid)
{
EVPCTX ctx = NULL;
int rc;
mbedtls_md_type_t algo = nid_to_md_algo(nid);
const mbedtls_md_info_t *md_info =
mbedtls_md_info_from_type(algo);
if (md_info == NULL) {
return NULL;
}
ctx = malloc(sizeof(mbedtls_md_context_t));
if (ctx == NULL) {
return NULL;
}
mbedtls_md_init(ctx);
rc = mbedtls_md_setup(ctx, md_info, 0);
if (rc != 0) {
SAFE_FREE(ctx);
return NULL;
}
rc = mbedtls_md_starts(ctx);
if (rc != 0) {
SAFE_FREE(ctx);
return NULL;
}
return ctx;
}
void evp(int nid, unsigned char *digest, int len,
unsigned char *hash, unsigned int *hlen)
{
int algo = nid_to_md_algo(nid);
/* Note: What gcrypt calls 'hash' is called 'digest' here and
vice-versa. */
gcry_md_hash_buffer(algo, hash, digest, len);
*hlen = gcry_md_get_algo_dlen(algo);
}
void evp(int nid, unsigned char *digest, int len,
unsigned char *hash, unsigned int *hlen)
{
mbedtls_md_type_t algo = nid_to_md_algo(nid);
const mbedtls_md_info_t *md_info =
mbedtls_md_info_from_type(algo);
if (md_info != NULL) {
*hlen = mbedtls_md_get_size(md_info);
mbedtls_md(md_info, digest, len, hash);
}
}
EVPCTX evp_init(int nid)
{
gcry_error_t err;
int algo = nid_to_md_algo(nid);
EVPCTX ctx;
err = gcry_md_open(&ctx, algo, 0);
if (err) {
return NULL;
}
return ctx;
}
