- pad_len = data_len % cparams->block_size ? cparams->block_size -
- (data_len % cparams->block_size) : 0;
+ if (cparams->do_cipher) {
+ /*
+ * Following algorithms are block cipher algorithms,
+ * and might need padding
+ */
+ switch (cparams->cipher_algo) {
+ case RTE_CRYPTO_CIPHER_AES_CBC:
+ case RTE_CRYPTO_CIPHER_AES_ECB:
+ case RTE_CRYPTO_CIPHER_3DES_CBC:
+ case RTE_CRYPTO_CIPHER_3DES_ECB:
+ if (data_len % cparams->block_size)
+ pad_len = cparams->block_size -
+ (data_len % cparams->block_size);
+ break;
+ default:
+ pad_len = 0;
+ }