diff options
| -rw-r--r-- | providers/implementations/kdfs/hmacdrbg_kdf.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/providers/implementations/kdfs/hmacdrbg_kdf.c b/providers/implementations/kdfs/hmacdrbg_kdf.c index 30f1dfbd24..3df5221580 100644 --- a/providers/implementations/kdfs/hmacdrbg_kdf.c +++ b/providers/implementations/kdfs/hmacdrbg_kdf.c @@ -183,6 +183,7 @@ static int hmac_drbg_kdf_set_ctx_params(void *vctx, const OSSL_PARAM *p; void *ptr = NULL; size_t size = 0; + int md_size; if (params == NULL) return 1; @@ -220,7 +221,10 @@ static int hmac_drbg_kdf_set_ctx_params(void *vctx, ERR_raise(ERR_LIB_PROV, PROV_R_XOF_DIGESTS_NOT_ALLOWED); return 0; } - drbg->blocklen = EVP_MD_get_size(md); + md_size = EVP_MD_get_size(md); + if (md_size <= 0) + return 0; + drbg->blocklen = (size_t)md_size; } return ossl_prov_macctx_load_from_params(&drbg->ctx, params, "HMAC", NULL, NULL, libctx); |