C++ (Cpp) gf128mul_4k_lle Examples

Example #1

File: gcm.c Project: johnny/CobraDroidBeta

static void crypto_gcm_ghash_update(struct crypto_gcm_ghash_ctx *ctx,
				    const u8 *src, unsigned int srclen)
{
	u8 *dst = ctx->buffer;

	if (ctx->bytes) {
		int n = min(srclen, ctx->bytes);
		u8 *pos = dst + (16 - ctx->bytes);

		ctx->bytes -= n;
		srclen -= n;

		while (n--)
			*pos++ ^= *src++;

		if (!ctx->bytes)
			gf128mul_4k_lle((be128 *)dst, ctx->gf128);
	}

	while (srclen >= 16) {
		crypto_xor(dst, src, 16);
		gf128mul_4k_lle((be128 *)dst, ctx->gf128);
		src += 16;
		srclen -= 16;
	}

	if (srclen) {
		ctx->bytes = 16 - srclen;
		while (srclen--)
			*dst++ ^= *src++;
	}
}

Example #2

File: ghash-generic.c Project: 01org/thunderbolt-software-kernel-tree

static int ghash_update(struct shash_desc *desc,
			 const u8 *src, unsigned int srclen)
{
	struct ghash_desc_ctx *dctx = shash_desc_ctx(desc);
	struct ghash_ctx *ctx = crypto_shash_ctx(desc->tfm);
	u8 *dst = dctx->buffer;

	if (!ctx->gf128)
		return -ENOKEY;

	if (dctx->bytes) {
		int n = min(srclen, dctx->bytes);
		u8 *pos = dst + (GHASH_BLOCK_SIZE - dctx->bytes);

		dctx->bytes -= n;
		srclen -= n;

		while (n--)
			*pos++ ^= *src++;

		if (!dctx->bytes)
			gf128mul_4k_lle((be128 *)dst, ctx->gf128);
	}

	while (srclen >= GHASH_BLOCK_SIZE) {
		crypto_xor(dst, src, GHASH_BLOCK_SIZE);
		gf128mul_4k_lle((be128 *)dst, ctx->gf128);
		src += GHASH_BLOCK_SIZE;
		srclen -= GHASH_BLOCK_SIZE;
	}

	if (srclen) {
		dctx->bytes = GHASH_BLOCK_SIZE - srclen;
		while (srclen--)
			*dst++ ^= *src++;
	}

	return 0;
}

Example #3

File: ghash-generic.c Project: CCNITSilchar/linux

static void ghash_flush(struct ghash_ctx *ctx, struct ghash_desc_ctx *dctx)
{
	u8 *dst = dctx->buffer;

	if (dctx->bytes) {
		u8 *tmp = dst + (GHASH_BLOCK_SIZE - dctx->bytes);

		while (dctx->bytes--)
			*tmp++ ^= 0;

		gf128mul_4k_lle((be128 *)dst, ctx->gf128);
	}

	dctx->bytes = 0;
}

Example #4

File: gcm.c Project: johnny/CobraDroidBeta

static void crypto_gcm_ghash_final_xor(struct crypto_gcm_ghash_ctx *ctx,
				       unsigned int authlen,
				       unsigned int cryptlen, u8 *dst)
{
	u8 *buf = ctx->buffer;
	u128 lengths;

	lengths.a = cpu_to_be64(authlen * 8);
	lengths.b = cpu_to_be64(cryptlen * 8);

	crypto_gcm_ghash_flush(ctx);
	crypto_xor(buf, (u8 *)&lengths, 16);
	gf128mul_4k_lle((be128 *)buf, ctx->gf128);
	crypto_xor(dst, buf, 16);
}

Example #5

File: gcm.c Project: johnny/CobraDroidBeta

static void crypto_gcm_ghash_flush(struct crypto_gcm_ghash_ctx *ctx)
{
	u8 *dst = ctx->buffer;

	if (ctx->bytes) {
		u8 *tmp = dst + (16 - ctx->bytes);

		while (ctx->bytes--)
			*tmp++ ^= 0;

		gf128mul_4k_lle((be128 *)dst, ctx->gf128);
	}

	ctx->bytes = 0;
}