diff options
Diffstat (limited to 'providers')
| -rw-r--r-- | providers/implementations/signature/sm2_sig.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/providers/implementations/signature/sm2_sig.c b/providers/implementations/signature/sm2_sig.c index 6b8936b959..346172abc0 100644 --- a/providers/implementations/signature/sm2_sig.c +++ b/providers/implementations/signature/sm2_sig.c @@ -310,11 +310,13 @@ int sm2sig_digest_verify_final(void *vpsm2ctx, const unsigned char *sig, PROV_SM2_CTX *psm2ctx = (PROV_SM2_CTX *)vpsm2ctx; unsigned char digest[EVP_MAX_MD_SIZE]; unsigned int dlen = 0; + int md_size; - if (psm2ctx == NULL - || psm2ctx->mdctx == NULL - || EVP_MD_get_size(psm2ctx->md) <= 0 - || EVP_MD_get_size(psm2ctx->md) > (int)sizeof(digest)) + if (psm2ctx == NULL || psm2ctx->mdctx == NULL) + return 0; + + md_size = EVP_MD_get_size(psm2ctx->md); + if (md_size <= 0 || md_size > (int)sizeof(digest)) return 0; if (!(sm2sig_compute_z_digest(psm2ctx) |