pkcs1_decode
int pkcs1_decode(int method, uint8_t *padbuf, size_t *plen);
rv = pkcs1_decode(PKCS1_VERIFY, plain_data, &data_len);
rv = pkcs1_decode(PKCS1_DECRYPT, plain_data, &plain_len);
rv = pkcs1_decode(PKCS1_VERIFY, plain_data, &data_len);
if ((rc = pkcs1_decode(PKCS1_VERIFY, plain_data, &data_len)) != CKR_OK)
rv = pkcs1_decode(PKCS1_VERIFY, plain_data, &data_len);
rv = pkcs1_decode(PKCS1_VERIFY, plain_data, &data_len);
rv = pkcs1_decode(PKCS1_DECRYPT, plain_data,