start aes_gcm

crypto/aes_gcm.c

@@ -0,0 +1,47 @@
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+#include "aes.h"
+#include "crypto.h"
+#include "util.h"
+
+#define BLOCK_SIZE 16
+
+static struct AES_ctx aes_ctx;
+
+// void AES_CTR_xcrypt_buffer(struct AES_ctx* ctx, uint8_t* buf, uint32_t length);
+
+int8_t crypto_aes256_gcm_encrypt(uint8_t * data, uint32_t length, uint8_t * authtag)
+{
+    memset(authtag, 0, BLOCK_SIZE);
+    AES_CTR_xcrypt_buffer(&aes_ctx, authtag, BLOCK_SIZE);
+
+    return 0;
+}
+
+#ifdef TEST
+
+int main(int argc, char * argv[])
+{
+    uint8_t nonce[16];
+    uint8_t key[32];
+    uint8_t authtag[BLOCK_SIZE];
+
+    uint8_t * authtag1 = "\x53\x0f\x8a\xfb\xc7\x45\x36\xb9\xa9\x63\xb4\xf1\xc4\xcb\x73\x8b";
+
+    memset(nonce,0,16);
+    memset(key,0,16);
+
+    AES_init_ctx_iv(&aes_ctx, key, nonce);
+
+    crypto_aes256_gcm_encrypt(NULL, 0, authtag);
+
+    printf("Auth tag: "); dump_hex(authtag, BLOCK_SIZE);
+
+
+    return 0;
+}
+
+#endif