CAST_cfb64_encrypt
LCRYPTO_ALIAS(CAST_cfb64_encrypt);
void CAST_cfb64_encrypt(const unsigned char *in, unsigned char *out,
CAST_cfb64_encrypt(in, out, (long)chunk, &((EVP_CAST_KEY *)ctx->cipher_data)->ks, ctx->iv, &ctx->num, ctx->encrypt);
LCRYPTO_USED(CAST_cfb64_encrypt);