#### 3.2.4 Error Strings

Function: const char * gcry_strerror (gcry_error_t err)

  The function `gcry_strerror` returns a pointer to a statically allocated string containing a description of the error code contained in the error value err. This string can be used to output a diagnostic message to the user.

Function: const char * gcry_strsource (gcry_error_t err)

  The function `gcry_strsource` returns a pointer to a statically allocated string containing a description of the error source contained in the error value err. This string can be used to output a diagnostic message to the user.

The following example illustrates the use of the functions described above:

    {
      gcry_cipher_hd_t handle;
      gcry_error_t err = 0;

      err = gcry_cipher_open (&handle, GCRY_CIPHER_AES,
                              GCRY_CIPHER_MODE_CBC, 0);
      if (err)
        {
          fprintf (stderr, "Failure: %s/%s\n",
                   gcry_strsource (err),
                   gcry_strerror (err));
        }
    }