Ejemplos de ce_aes_ccm_auth_data en C++ (Cpp)

Ejemplo n.º 1

Archivo: aes-ce-ccm-glue.c Proyecto: a1d3s/linux-bpi

static void ccm_calculate_auth_mac(struct aead_request *req, u8 mac[])
{
	struct crypto_aead *aead = crypto_aead_reqtfm(req);
	struct crypto_aes_ctx *ctx = crypto_aead_ctx(aead);
	struct __packed { __be16 l; __be32 h; u16 len; } ltag;
	struct scatter_walk walk;
	u32 len = req->assoclen;
	u32 macp = 0;

	/* prepend the AAD with a length tag */
	if (len < 0xff00) {
		ltag.l = cpu_to_be16(len);
		ltag.len = 2;
	} else  {
		ltag.l = cpu_to_be16(0xfffe);
		put_unaligned_be32(len, &ltag.h);
		ltag.len = 6;
	}

	ce_aes_ccm_auth_data(mac, (u8 *)&ltag, ltag.len, &macp, ctx->key_enc,
			     num_rounds(ctx));
	scatterwalk_start(&walk, req->src);

	do {
		u32 n = scatterwalk_clamp(&walk, len);
		u8 *p;

		if (!n) {
			scatterwalk_start(&walk, sg_next(walk.sg));
			n = scatterwalk_clamp(&walk, len);
		}
		p = scatterwalk_map(&walk);
		ce_aes_ccm_auth_data(mac, p, n, &macp, ctx->key_enc,
				     num_rounds(ctx));
		len -= n;

		scatterwalk_unmap(p);
		scatterwalk_advance(&walk, n);
		scatterwalk_done(&walk, 0, len);
	} while (len);
}

Ejemplo n.º 2

Archivo: aes-ce-ccm-glue.c Proyecto: FireBurn/linux

static void ccm_update_mac(struct crypto_aes_ctx *key, u8 mac[], u8 const in[],
			   u32 abytes, u32 *macp)
{
	if (crypto_simd_usable()) {
		kernel_neon_begin();
		ce_aes_ccm_auth_data(mac, in, abytes, macp, key->key_enc,
				     num_rounds(key));
		kernel_neon_end();
	} else {
		if (*macp > 0 && *macp < AES_BLOCK_SIZE) {
			int added = min(abytes, AES_BLOCK_SIZE - *macp);

			crypto_xor(&mac[*macp], in, added);

			*macp += added;
			in += added;
			abytes -= added;
		}

		while (abytes >= AES_BLOCK_SIZE) {
			__aes_arm64_encrypt(key->key_enc, mac, mac,
					    num_rounds(key));
			crypto_xor(mac, in, AES_BLOCK_SIZE);

			in += AES_BLOCK_SIZE;
			abytes -= AES_BLOCK_SIZE;
		}

		if (abytes > 0) {
			__aes_arm64_encrypt(key->key_enc, mac, mac,
					    num_rounds(key));
			crypto_xor(mac, in, abytes);
			*macp = abytes;
		}
	}
}