/* Initialize CTR for ACPKM-Master */
if (!EVP_CIPHER_CTX_cipher(ctx->actx))
return 0;
/* block size of ACPKM cipher could be 1, but,
* cbc cipher is same with correct block_size */
/* Initialize CTR for ACPKM-Master */
if (!EVP_CIPHER_CTX_cipher(ctx->actx))
return 0;
/* block size of ACPKM cipher could be 1, but,
* cbc cipher is same with correct block_size */