C++ (Cpp) aesni_ctr_enc_tfm Examples

Example #1

File: aesni-intel_glue.c Project: KutuSystems/kutu_linux

static int ctr_crypt(struct blkcipher_desc *desc,
		     struct scatterlist *dst, struct scatterlist *src,
		     unsigned int nbytes)
{
	struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm));
	struct blkcipher_walk walk;
	int err;

	blkcipher_walk_init(&walk, dst, src, nbytes);
	err = blkcipher_walk_virt_block(desc, &walk, AES_BLOCK_SIZE);
	desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;

	kernel_fpu_begin();
	while ((nbytes = walk.nbytes) >= AES_BLOCK_SIZE) {
		aesni_ctr_enc_tfm(ctx, walk.dst.virt.addr, walk.src.virt.addr,
			              nbytes & AES_BLOCK_MASK, walk.iv);
		nbytes &= AES_BLOCK_SIZE - 1;
		err = blkcipher_walk_done(desc, &walk, nbytes);
	}
	if (walk.nbytes) {
		ctr_crypt_final(ctx, &walk);
		err = blkcipher_walk_done(desc, &walk, 0);
	}
	kernel_fpu_end();

	return err;
}

Example #2

File: aesni-intel_glue.c Project: EMFPGA/linux_media

static int ctr_crypt(struct skcipher_request *req)
{
	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
	struct crypto_aes_ctx *ctx = aes_ctx(crypto_skcipher_ctx(tfm));
	struct skcipher_walk walk;
	unsigned int nbytes;
	int err;

	err = skcipher_walk_virt(&walk, req, true);

	kernel_fpu_begin();
	while ((nbytes = walk.nbytes) >= AES_BLOCK_SIZE) {
		aesni_ctr_enc_tfm(ctx, walk.dst.virt.addr, walk.src.virt.addr,
			              nbytes & AES_BLOCK_MASK, walk.iv);
		nbytes &= AES_BLOCK_SIZE - 1;
		err = skcipher_walk_done(&walk, nbytes);
	}
	if (walk.nbytes) {
		ctr_crypt_final(ctx, &walk);
		err = skcipher_walk_done(&walk, 0);
	}
	kernel_fpu_end();

	return err;
}