* \param hash hash value.
* \param hash_len hash value length (in bytes).
* \param sk RSA private key.
- * \param x output buffer for the hash value.
+ * \param x output buffer for the signature value.
* \return 1 on success, 0 on error.
*/
typedef uint32_t (*br_rsa_pkcs1_sign)(const unsigned char *hash_oid,