drivers/crypto/ccp/ccp-crypto-des3.c

Source file repositories/reference/linux-study-clean/drivers/crypto/ccp/ccp-crypto-des3.c

File Facts

System
Linux kernel
Corpus path
drivers/crypto/ccp/ccp-crypto-des3.c
Extension
.c
Size
5813 bytes
Lines
229
Domain
Driver Families
Bucket
drivers/crypto
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct ccp_des3_def {
	enum ccp_des3_mode mode;
	unsigned int version;
	const char *name;
	const char *driver_name;
	unsigned int blocksize;
	unsigned int ivsize;
	const struct skcipher_alg *alg_defaults;
};

static const struct ccp_des3_def des3_algs[] = {
	{
		.mode		= CCP_DES3_MODE_ECB,
		.version	= CCP_VERSION(5, 0),
		.name		= "ecb(des3_ede)",
		.driver_name	= "ecb-des3-ccp",
		.blocksize	= DES3_EDE_BLOCK_SIZE,
		.ivsize		= 0,
		.alg_defaults	= &ccp_des3_defaults,
	},
	{
		.mode		= CCP_DES3_MODE_CBC,
		.version	= CCP_VERSION(5, 0),
		.name		= "cbc(des3_ede)",
		.driver_name	= "cbc-des3-ccp",
		.blocksize	= DES3_EDE_BLOCK_SIZE,
		.ivsize		= DES3_EDE_BLOCK_SIZE,
		.alg_defaults	= &ccp_des3_defaults,
	},
};

static int ccp_register_des3_alg(struct list_head *head,
				 const struct ccp_des3_def *def)
{
	struct ccp_crypto_skcipher_alg *ccp_alg;
	struct skcipher_alg *alg;
	int ret;

	ccp_alg = kzalloc_obj(*ccp_alg);
	if (!ccp_alg)
		return -ENOMEM;

	INIT_LIST_HEAD(&ccp_alg->entry);

	ccp_alg->mode = def->mode;

	/* Copy the defaults and override as necessary */
	alg = &ccp_alg->alg;
	*alg = *def->alg_defaults;
	strscpy(alg->base.cra_name, def->name);
	strscpy(alg->base.cra_driver_name, def->driver_name);
	alg->base.cra_blocksize = def->blocksize;
	alg->ivsize = def->ivsize;

	ret = crypto_register_skcipher(alg);
	if (ret) {
		pr_err("%s skcipher algorithm registration error (%d)\n",
				alg->base.cra_name, ret);
		kfree(ccp_alg);
		return ret;
	}

	list_add(&ccp_alg->entry, head);

	return 0;
}

int ccp_register_des3_algs(struct list_head *head)
{
	int i, ret;
	unsigned int ccpversion = ccp_version();

	for (i = 0; i < ARRAY_SIZE(des3_algs); i++) {
		if (des3_algs[i].version > ccpversion)
			continue;
		ret = ccp_register_des3_alg(head, &des3_algs[i]);
		if (ret)
			return ret;
	}

	return 0;
}

Annotation

Implementation Notes