EVP_MD_CTX_copy_ex: Allow copying uninitialized digest contexts
Fixes
@@ -510,11 +510,20 @@ int EVP_MD_CTX_copy_ex(EVP_MD_CTX *out, const EVP_MD_CTX *in)
{
unsigned char *tmp_buf;
- if (in == NULL || in->digest == NULL) {
- ERR_raise(ERR_LIB_EVP, EVP_R_INPUT_NOT_INITIALIZED);
+ if (in == NULL) {
+ ERR_raise(ERR_LIB_EVP, ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
+ if (in->digest == NULL) {
+ /* copying uninitialized digest context */
+ EVP_MD_CTX_reset(out);
+ if (out->fetched_digest != NULL)
+ EVP_MD_free(out->fetched_digest);
+ *out = *in;
+ return 1;
+ }
+
if (in->digest->prov == NULL
|| (in->flags & EVP_MD_CTX_FLAG_NO_INIT) != 0)
goto legacy;
