size_t *siglen, const unsigned char *tbs,
size_t tbslen)
{
- int ret;
+ int ret, md_size;
unsigned int sltmp;
DSA_PKEY_CTX *dctx = ctx->data;
/*
*/
DSA *dsa = (DSA *)EVP_PKEY_get0_DSA(ctx->pkey);
- if (dctx->md != NULL && tbslen != (size_t)EVP_MD_get_size(dctx->md))
- return 0;
+ if (dctx->md != NULL) {
+ md_size = EVP_MD_get_size(dctx->md);
+ if (md_size <= 0)
+ return 0;
+ if (tbslen != (size_t)md_size)
+ return 0;
+ }
ret = DSA_sign(0, tbs, tbslen, sig, &sltmp, dsa);
const unsigned char *sig, size_t siglen,
const unsigned char *tbs, size_t tbslen)
{
- int ret;
+ int ret, md_size;
DSA_PKEY_CTX *dctx = ctx->data;
/*
* Discard const. Its marked as const because this may be a cached copy of
*/
DSA *dsa = (DSA *)EVP_PKEY_get0_DSA(ctx->pkey);
- if (dctx->md != NULL && tbslen != (size_t)EVP_MD_get_size(dctx->md))
- return 0;
+ if (dctx->md != NULL) {
+ md_size = EVP_MD_get_size(dctx->md);
+ if (md_size <= 0)
+ return 0;
+ if (tbslen != (size_t)md_size)
+ return 0;
+ }
ret = DSA_verify(0, tbs, tbslen, sig, siglen, dsa);