root@xilinx-zcu102-2019_1:/run/media/mmcblk0# ./Enc
Data Out:
edaae826b6b416bbd2815879692058f16df1133c7222d549141dcfef0faf01afd6433f9dc6bb7d3207d4a531cdf5e6ebf596bd4a0c3d430313ce88e2b9e16c086e633d24
GCM TAG:
b52b80cd5117afb47b116d4a8f89cf75
Input:
1234567808f070b030d0509010e060a020c0408000a5de08d85898a5a5fedca10134abcdef12345678900987654321123487654124456679874309713627463801ad1056root@xilinx-zcu102-2019_1:/run/media/mmcblk0# ./Dec
Data Out:
1234567808f070b030d0509010e060a020c0408000a5de08d85898a5a5fedca10134abcdef12345678900987654321123487654124456679874309713627463801ad1056

#include <stdio.h>
#include <unistd.h>
#include <sys/socket.h>
#include <linux/if_alg.h>
#include <linux/socket.h>
#include <string.h>

#ifndef SOL_ALG
#define SOL_ALG 279
#endif


#define KEY_SIZE        32
#define AAD_SIZE	16
#define IV_SIZE         12
#define GCM_TAG_SIZE    16
#define DATA_SIZE	68

#define VERSAL_AES_USER_KEY_0 12

int main(void)
{
	int len = AAD_SIZE + DATA_SIZE + GCM_TAG_SIZE;
	int opfd;
	int tfmfd;
	struct sockaddr_alg sa = {
		.salg_family = AF_ALG,
		.salg_type = "aead",
		.salg_name = "gcm(aes)"
	};
	struct msghdr msg = {};
	struct cmsghdr *cmsg;
	char cbuf[CMSG_SPACE(4) + CMSG_SPACE(1024) + CMSG_SPACE(1024)] = {0};
	char buf[len];
	struct af_alg_iv *iv;
	struct iovec iov;
	int i;


	__u8 key[] = {
		0xF8, 0x78, 0xB8, 0x38, 0xD8, 0x58, 0x98, 0x18, 0xE8, 0x68, 0xA8, 0x28, 0xC8, 0x48,
		0x88, 0x08, 0xF0, 0x70, 0xB0, 0x30, 0xD0, 0x50, 0x90, 0x10, 0xE0, 0x60, 0xA0, 0x20,
		0xC0, 0x40, 0x80, 0x00
	};
	__u8 key_type[] = {VERSAL_AES_USER_KEY_0};


	__u8 usr_iv[] = {
		0xD2, 0x45, 0x0E, 0x07, 0xEA, 0x5D, 0xE0, 0x42, 0x6C, 0x0F, 0xA1, 0x33
	};
	__u8 input[] = {
		/* First1bytes are AAD data */
		0x67, 0xe2, 0x1c, 0xf3, 0xcb, 0x29, 0xe0, 0xdc,
		0xbc, 0x4d, 0x8b, 0x1d, 0x0c, 0xc5, 0x33, 0x4b,
		/* Cipher text  */
		0xed, 0xaa, 0xe8, 0x26, 0xb6, 0xb4, 0x16, 0xbb, 0xd2, 0x81, 0x58, 0x79, 0x69, 0x20, 0x58, 0xf1, 0x6d, 0xf1, 0x13, 0x3c, 0x72,
		0x22, 0xd5, 0x49, 0x14, 0x1d, 0xcf, 0xef, 0x0f, 0xaf, 0x01, 0xaf, 0xd6, 0x43, 0x3f, 0x9d, 0xc6, 0xbb, 0x7d, 0x32, 0x07, 0xd4,
		0xa5, 0x31, 0xcd, 0xf5, 0xe6, 0xeb, 0xf5, 0x96, 0xbd, 0x4a, 0x0c, 0x3d, 0x43, 0x03, 0x13, 0xce, 0x88, 0xe2, 0xb9, 0xe1, 0x6c,
		0x08, 0x6e, 0x63, 0x3d, 0x24,

		/* GCM TAG */
		0xec, 0x5a, 0xfd, 0x6b, 0x11, 0x8c, 0xff, 0x14, 0xfb, 0x63, 0x16, 0x75, 0xa5, 0x84, 0x0b, 0x4c

	};



	tfmfd = socket(AF_ALG, SOCK_SEQPACKET, 0);
	printf("BIND \n");
	bind(tfmfd, (struct sockaddr *)&sa, sizeof(sa));
	printf("SET KEY \n");
	setsockopt(tfmfd, SOL_ALG, ALG_SET_KEY, key, KEY_SIZE);
	printf("SET auth size \n");
	setsockopt(tfmfd, SOL_ALG, ALG_SET_AEAD_AUTHSIZE, NULL, 16);
	printf("ACCEPT \n");
	opfd = accept(tfmfd, NULL, 0);
	msg.msg_control = cbuf;
	msg.msg_controllen = sizeof(cbuf);
	printf("SET OP \n");
	cmsg = CMSG_FIRSTHDR(&msg);
	cmsg->cmsg_level = SOL_ALG;
	cmsg->cmsg_type = ALG_SET_OP;
	cmsg->cmsg_len = CMSG_LEN(4);
	*(__u32 *)CMSG_DATA(cmsg) = ALG_OP_DECRYPT;
	printf("SET IV \n");
	cmsg = CMSG_NXTHDR(&msg, cmsg);
	cmsg->cmsg_level = SOL_ALG;
	cmsg->cmsg_type = ALG_SET_IV;
	cmsg->cmsg_len = CMSG_LEN(1024);
	iv = (void *)CMSG_DATA(cmsg);
	iv->ivlen = IV_SIZE;
	memcpy(iv->iv, usr_iv, IV_SIZE);

	cmsg = CMSG_NXTHDR(&msg, cmsg);
	cmsg->cmsg_level = SOL_ALG;
	cmsg->cmsg_type = ALG_SET_AEAD_ASSOCLEN;
	cmsg->cmsg_len = CMSG_LEN(1024);

	iv = (void *)CMSG_DATA(cmsg);
	iv->ivlen = AAD_SIZE;

	iov.iov_base = input;
	iov.iov_len = len;
	printf("SET INPUT \n");
	msg.msg_iov = &iov;
	msg.msg_iovlen = 1;
	printf("SEND MSG \n");
	sendmsg(opfd, &msg, 0);
	printf("READ \n");
	read(opfd, buf, len - GCM_TAG_SIZE);

	close(opfd);
	printf("CLOSE OPFD \n");
	close(tfmfd);
	printf("CLOSE TFMFD \n");

	printf("Data Out:\r\n");
	for (i = AAD_SIZE; i < len - GCM_TAG_SIZE; i++) {
		printf("%02x", (unsigned char)buf[i]);
	}
	printf("\n");

	return 0;
}