void testrun_aes128_cbc(void){
uint8_t key[16];
uint8_t iv[16];
uint8_t plain[64];
bcal_cbc_ctx_t ctx;
uint8_t r;
memcpy(key, modes_key, 16);
memcpy(iv, modes_iv, 16);
memcpy(plain, modes_plain, 64);
cli_putstr("\r\n** AES128-CBC-TEST **");
r = bcal_cbc_init(&aes128_desc, key, 128, &ctx);
cli_putstr("\r\n init = 0x");
cli_hexdump(&r, 1);
cli_putstr("\r\n key: ");
cli_hexdump(key, 128/8);
cli_putstr("\r\n IV: ");
cli_hexdump(iv, 128/8);
cli_putstr("\r\n plaintext:");
cli_hexdump_block(plain, 4*128/8, 4, 16);
if(r)
return;
bcal_cbc_encMsg(iv, plain, 4, &ctx);
cli_putstr("\r\n ciphertext: ");
cli_hexdump_block(plain, 4*128/8, 4, 16);
bcal_cbc_decMsg(iv, plain, 4, &ctx);
cli_putstr("\r\n plaintext: ");
cli_hexdump_block(plain, 4*128/8, 4, 16);
bcal_cbc_free(&ctx);
}
// prepare an encrypted to use for encrypting multiple blocks lateron.
// key and iv are assumed to be both 192bit thus 24 uint8_t's
aes_context aes192_cbc_enc_start(const uint8_t* key, const void* iv){
bcal_cbc_ctx_t* ctx = (bcal_cbc_ctx_t*)malloc(sizeof(bcal_cbc_ctx_t));
uint8_t r = bcal_cbc_init(&aes192_desc, key, 192, ctx);
if (r) {
free(ctx);
return NULL;
}
bcal_cbc_loadIV(iv, ctx);
return (aes_context)ctx;
}
// encrypt multiple blocks of 128bit data, data_len but be mod 16
// key and iv are assumed to be both 192bit thus 24 uint8_t's
void aes192_cbc_enc(const uint8_t* key, const uint8_t* iv, void* data, const uint16_t data_len){
if (data_len % 16 != 0) {
return;
}
bcal_cbc_ctx_t ctx;
uint8_t r;
r = bcal_cbc_init(&aes192_desc, key, 192, &ctx);
if (r) {
return;
}
bcal_cbc_encMsg(iv, data, data_len / 16, &ctx);
bcal_cbc_free(&ctx);
}