static void get_sigorhash(int *psig, int *phash, const char *str)
{
    if (strcmp(str, "RSA") == 0) {
        *psig = EVP_PKEY_RSA;
    } else if (strcmp(str, "DSA") == 0) {
        *psig = EVP_PKEY_DSA;
    } else if (strcmp(str, "ECDSA") == 0) {
        *psig = EVP_PKEY_EC;
    } else {
        *phash = OBJ_sn2nid(str);
        if (*phash == NID_undef)
            *phash = OBJ_ln2nid(str);
    }
}

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.