[linux-block.git] / drivers / crypto / ccp / ccp-crypto-aes.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * AMD Cryptographic Coprocessor (CCP) AES crypto API support
 *
 * Copyright (C) 2013-2019 Advanced Micro Devices, Inc.
 *
 * Author: Tom Lendacky <thomas.lendacky@amd.com>
 */

#include <linux/module.h>
#include <linux/sched.h>
#include <linux/delay.h>
#include <linux/scatterlist.h>
#include <linux/crypto.h>
#include <crypto/algapi.h>
#include <crypto/aes.h>
#include <crypto/ctr.h>
#include <crypto/scatterwalk.h>

#include "ccp-crypto.h"

static int ccp_aes_complete(struct crypto_async_request *async_req, int ret)
{
	struct skcipher_request *req = skcipher_request_cast(async_req);
	struct ccp_ctx *ctx = crypto_skcipher_ctx_dma(
		crypto_skcipher_reqtfm(req));
	struct ccp_aes_req_ctx *rctx = skcipher_request_ctx_dma(req);

	if (ret)
		return ret;

	if (ctx->u.aes.mode != CCP_AES_MODE_ECB)
		memcpy(req->iv, rctx->iv, AES_BLOCK_SIZE);

	return 0;
}

static int ccp_aes_setkey(struct crypto_skcipher *tfm, const u8 *key,
			  unsigned int key_len)
{
	struct ccp_crypto_skcipher_alg *alg = ccp_crypto_skcipher_alg(tfm);
	struct ccp_ctx *ctx = crypto_skcipher_ctx_dma(tfm);

	switch (key_len) {
	case AES_KEYSIZE_128:
		ctx->u.aes.type = CCP_AES_TYPE_128;
		break;
	case AES_KEYSIZE_192:
		ctx->u.aes.type = CCP_AES_TYPE_192;
		break;
	case AES_KEYSIZE_256:
		ctx->u.aes.type = CCP_AES_TYPE_256;
		break;
	default:
		return -EINVAL;
	}
	ctx->u.aes.mode = alg->mode;
	ctx->u.aes.key_len = key_len;

	memcpy(ctx->u.aes.key, key, key_len);
	sg_init_one(&ctx->u.aes.key_sg, ctx->u.aes.key, key_len);

	return 0;
}

static int ccp_aes_crypt(struct skcipher_request *req, bool encrypt)
{
	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
	struct ccp_ctx *ctx = crypto_skcipher_ctx_dma(tfm);
	struct ccp_aes_req_ctx *rctx = skcipher_request_ctx_dma(req);
	struct scatterlist *iv_sg = NULL;
	unsigned int iv_len = 0;

	if (!ctx->u.aes.key_len)
		return -EINVAL;

	if (((ctx->u.aes.mode == CCP_AES_MODE_ECB) ||
	     (ctx->u.aes.mode == CCP_AES_MODE_CBC)) &&
	    (req->cryptlen & (AES_BLOCK_SIZE - 1)))
		return -EINVAL;

	if (ctx->u.aes.mode != CCP_AES_MODE_ECB) {
		if (!req->iv)
			return -EINVAL;

		memcpy(rctx->iv, req->iv, AES_BLOCK_SIZE);
		iv_sg = &rctx->iv_sg;
		iv_len = AES_BLOCK_SIZE;
		sg_init_one(iv_sg, rctx->iv, iv_len);
	}

	memset(&rctx->cmd, 0, sizeof(rctx->cmd));
	INIT_LIST_HEAD(&rctx->cmd.entry);
	rctx->cmd.engine = CCP_ENGINE_AES;
	rctx->cmd.u.aes.type = ctx->u.aes.type;
	rctx->cmd.u.aes.mode = ctx->u.aes.mode;
	rctx->cmd.u.aes.action =
		(encrypt) ? CCP_AES_ACTION_ENCRYPT : CCP_AES_ACTION_DECRYPT;
	rctx->cmd.u.aes.key = &ctx->u.aes.key_sg;
	rctx->cmd.u.aes.key_len = ctx->u.aes.key_len;
	rctx->cmd.u.aes.iv = iv_sg;
	rctx->cmd.u.aes.iv_len = iv_len;
	rctx->cmd.u.aes.src = req->src;
	rctx->cmd.u.aes.src_len = req->cryptlen;
	rctx->cmd.u.aes.dst = req->dst;

	return ccp_crypto_enqueue_request(&req->base, &rctx->cmd);
}

static int ccp_aes_encrypt(struct skcipher_request *req)
{
	return ccp_aes_crypt(req, true);
}

static int ccp_aes_decrypt(struct skcipher_request *req)
{
	return ccp_aes_crypt(req, false);
}

static int ccp_aes_init_tfm(struct crypto_skcipher *tfm)
{
	struct ccp_ctx *ctx = crypto_skcipher_ctx_dma(tfm);

	ctx->complete = ccp_aes_complete;
	ctx->u.aes.key_len = 0;

	crypto_skcipher_set_reqsize(tfm, sizeof(struct ccp_aes_req_ctx));

	return 0;
}

static int ccp_aes_rfc3686_complete(struct crypto_async_request *async_req,
				    int ret)
{
	struct skcipher_request *req = skcipher_request_cast(async_req);
	struct ccp_aes_req_ctx *rctx = skcipher_request_ctx_dma(req);

	/* Restore the original pointer */
	req->iv = rctx->rfc3686_info;

	return ccp_aes_complete(async_req, ret);
}

static int ccp_aes_rfc3686_setkey(struct crypto_skcipher *tfm, const u8 *key,
				  unsigned int key_len)
{
	struct ccp_ctx *ctx = crypto_skcipher_ctx_dma(tfm);

	if (key_len < CTR_RFC3686_NONCE_SIZE)
		return -EINVAL;

	key_len -= CTR_RFC3686_NONCE_SIZE;
	memcpy(ctx->u.aes.nonce, key + key_len, CTR_RFC3686_NONCE_SIZE);

	return ccp_aes_setkey(tfm, key, key_len);
}

static int ccp_aes_rfc3686_crypt(struct skcipher_request *req, bool encrypt)
{
	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
	struct ccp_ctx *ctx = crypto_skcipher_ctx_dma(tfm);
	struct ccp_aes_req_ctx *rctx = skcipher_request_ctx_dma(req);
	u8 *iv;

	/* Initialize the CTR block */
	iv = rctx->rfc3686_iv;
	memcpy(iv, ctx->u.aes.nonce, CTR_RFC3686_NONCE_SIZE);

	iv += CTR_RFC3686_NONCE_SIZE;
	memcpy(iv, req->iv, CTR_RFC3686_IV_SIZE);

	iv += CTR_RFC3686_IV_SIZE;
	*(__be32 *)iv = cpu_to_be32(1);

	/* Point to the new IV */
	rctx->rfc3686_info = req->iv;
	req->iv = rctx->rfc3686_iv;

	return ccp_aes_crypt(req, encrypt);
}

static int ccp_aes_rfc3686_encrypt(struct skcipher_request *req)
{
	return ccp_aes_rfc3686_crypt(req, true);
}

static int ccp_aes_rfc3686_decrypt(struct skcipher_request *req)
{
	return ccp_aes_rfc3686_crypt(req, false);
}

static int ccp_aes_rfc3686_init_tfm(struct crypto_skcipher *tfm)
{
	struct ccp_ctx *ctx = crypto_skcipher_ctx_dma(tfm);

	ctx->complete = ccp_aes_rfc3686_complete;
	ctx->u.aes.key_len = 0;

	crypto_skcipher_set_reqsize_dma(tfm, sizeof(struct ccp_aes_req_ctx));

	return 0;
}

static const struct skcipher_alg ccp_aes_defaults = {
	.setkey			= ccp_aes_setkey,
	.encrypt		= ccp_aes_encrypt,
	.decrypt		= ccp_aes_decrypt,
	.min_keysize		= AES_MIN_KEY_SIZE,
	.max_keysize		= AES_MAX_KEY_SIZE,
	.init			= ccp_aes_init_tfm,

	.base.cra_flags		= CRYPTO_ALG_ASYNC |
				  CRYPTO_ALG_ALLOCATES_MEMORY |
				  CRYPTO_ALG_KERN_DRIVER_ONLY |
				  CRYPTO_ALG_NEED_FALLBACK,
	.base.cra_blocksize	= AES_BLOCK_SIZE,
	.base.cra_ctxsize	= sizeof(struct ccp_ctx) + CRYPTO_DMA_PADDING,
	.base.cra_priority	= CCP_CRA_PRIORITY,
	.base.cra_module	= THIS_MODULE,
};

static const struct skcipher_alg ccp_aes_rfc3686_defaults = {
	.setkey			= ccp_aes_rfc3686_setkey,
	.encrypt		= ccp_aes_rfc3686_encrypt,
	.decrypt		= ccp_aes_rfc3686_decrypt,
	.min_keysize		= AES_MIN_KEY_SIZE + CTR_RFC3686_NONCE_SIZE,
	.max_keysize		= AES_MAX_KEY_SIZE + CTR_RFC3686_NONCE_SIZE,
	.init			= ccp_aes_rfc3686_init_tfm,

	.base.cra_flags		= CRYPTO_ALG_ASYNC |
				  CRYPTO_ALG_ALLOCATES_MEMORY |
				  CRYPTO_ALG_KERN_DRIVER_ONLY |
				  CRYPTO_ALG_NEED_FALLBACK,
	.base.cra_blocksize	= CTR_RFC3686_BLOCK_SIZE,
	.base.cra_ctxsize	= sizeof(struct ccp_ctx) + CRYPTO_DMA_PADDING,
	.base.cra_priority	= CCP_CRA_PRIORITY,
	.base.cra_module	= THIS_MODULE,
};

struct ccp_aes_def {
	enum ccp_aes_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 struct ccp_aes_def aes_algs[] = {
	{
		.mode		= CCP_AES_MODE_ECB,
		.version	= CCP_VERSION(3, 0),
		.name		= "ecb(aes)",
		.driver_name	= "ecb-aes-ccp",
		.blocksize	= AES_BLOCK_SIZE,
		.ivsize		= 0,
		.alg_defaults	= &ccp_aes_defaults,
	},
	{
		.mode		= CCP_AES_MODE_CBC,
		.version	= CCP_VERSION(3, 0),
		.name		= "cbc(aes)",
		.driver_name	= "cbc-aes-ccp",
		.blocksize	= AES_BLOCK_SIZE,
		.ivsize		= AES_BLOCK_SIZE,
		.alg_defaults	= &ccp_aes_defaults,
	},
	{
		.mode		= CCP_AES_MODE_CTR,
		.version	= CCP_VERSION(3, 0),
		.name		= "ctr(aes)",
		.driver_name	= "ctr-aes-ccp",
		.blocksize	= 1,
		.ivsize		= AES_BLOCK_SIZE,
		.alg_defaults	= &ccp_aes_defaults,
	},
	{
		.mode		= CCP_AES_MODE_CTR,
		.version	= CCP_VERSION(3, 0),
		.name		= "rfc3686(ctr(aes))",
		.driver_name	= "rfc3686-ctr-aes-ccp",
		.blocksize	= 1,
		.ivsize		= CTR_RFC3686_IV_SIZE,
		.alg_defaults	= &ccp_aes_rfc3686_defaults,
	},
};

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

	ccp_alg = kzalloc(sizeof(*ccp_alg), GFP_KERNEL);
	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;
	snprintf(alg->base.cra_name, CRYPTO_MAX_ALG_NAME, "%s", def->name);
	snprintf(alg->base.cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s",
		 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_aes_algs(struct list_head *head)
{
	int i, ret;
	unsigned int ccpversion = ccp_version();

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

	return 0;
}
Commit	Line	Data
d2912cb1	1	// SPDX-License-Identifier: GPL-2.0-only
2b789435 TL	2	/*
	3	* AMD Cryptographic Coprocessor (CCP) AES crypto API support
	4	*
c3b359d6	5	* Copyright (C) 2013-2019 Advanced Micro Devices, Inc.
2b789435 TL	6	*
2b789435 TL	7	* Author: Tom Lendacky <thomas.lendacky@amd.com>
2b789435 TL	8	*/
	9
	10	#include <linux/module.h>
	11	#include <linux/sched.h>
	12	#include <linux/delay.h>
	13	#include <linux/scatterlist.h>
	14	#include <linux/crypto.h>
	15	#include <crypto/algapi.h>
	16	#include <crypto/aes.h>
	17	#include <crypto/ctr.h>
	18	#include <crypto/scatterwalk.h>
	19
	20	#include "ccp-crypto.h"
	21
2b789435 TL	22	static int ccp_aes_complete(struct crypto_async_request *async_req, int ret)
2b789435 TL	23	{
be9fe620	24	struct skcipher_request *req = skcipher_request_cast(async_req);
99c6b20e HX	25	struct ccp_ctx *ctx = crypto_skcipher_ctx_dma(
	26	crypto_skcipher_reqtfm(req));
	27	struct ccp_aes_req_ctx *rctx = skcipher_request_ctx_dma(req);
2b789435 TL	28
	29	if (ret)
	30	return ret;
	31
	32	if (ctx->u.aes.mode != CCP_AES_MODE_ECB)
be9fe620	33	memcpy(req->iv, rctx->iv, AES_BLOCK_SIZE);
2b789435 TL	34
	35	return 0;
	36	}
	37
be9fe620	38	static int ccp_aes_setkey(struct crypto_skcipher tfm, const u8 key,
2b789435 TL	39	unsigned int key_len)
2b789435 TL	40	{
be9fe620	41	struct ccp_crypto_skcipher_alg *alg = ccp_crypto_skcipher_alg(tfm);
99c6b20e	42	struct ccp_ctx *ctx = crypto_skcipher_ctx_dma(tfm);
2b789435 TL	43
	44	switch (key_len) {
	45	case AES_KEYSIZE_128:
	46	ctx->u.aes.type = CCP_AES_TYPE_128;
	47	break;
	48	case AES_KEYSIZE_192:
	49	ctx->u.aes.type = CCP_AES_TYPE_192;
	50	break;
	51	case AES_KEYSIZE_256:
	52	ctx->u.aes.type = CCP_AES_TYPE_256;
	53	break;
	54	default:
2b789435 TL	55	return -EINVAL;
	56	}
	57	ctx->u.aes.mode = alg->mode;
	58	ctx->u.aes.key_len = key_len;
	59
	60	memcpy(ctx->u.aes.key, key, key_len);
	61	sg_init_one(&ctx->u.aes.key_sg, ctx->u.aes.key, key_len);
	62
	63	return 0;
	64	}
	65
be9fe620	66	static int ccp_aes_crypt(struct skcipher_request *req, bool encrypt)
2b789435	67	{
be9fe620	68	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
99c6b20e HX	69	struct ccp_ctx *ctx = crypto_skcipher_ctx_dma(tfm);
99c6b20e HX	70	struct ccp_aes_req_ctx *rctx = skcipher_request_ctx_dma(req);
2b789435 TL	71	struct scatterlist *iv_sg = NULL;
2b789435 TL	72	unsigned int iv_len = 0;
2b789435	73
369f3dab	74	if (!ctx->u.aes.key_len)
2b789435	75	return -EINVAL;
2b789435 TL	76
2b789435 TL	77	if (((ctx->u.aes.mode == CCP_AES_MODE_ECB) \|\|
c3b359d6	78	(ctx->u.aes.mode == CCP_AES_MODE_CBC)) &&
be9fe620	79	(req->cryptlen & (AES_BLOCK_SIZE - 1)))
2b789435	80	return -EINVAL;
2b789435 TL	81
2b789435 TL	82	if (ctx->u.aes.mode != CCP_AES_MODE_ECB) {
be9fe620	83	if (!req->iv)
2b789435	84	return -EINVAL;
2b789435	85
be9fe620	86	memcpy(rctx->iv, req->iv, AES_BLOCK_SIZE);
2b789435 TL	87	iv_sg = &rctx->iv_sg;
	88	iv_len = AES_BLOCK_SIZE;
	89	sg_init_one(iv_sg, rctx->iv, iv_len);
	90	}
	91
	92	memset(&rctx->cmd, 0, sizeof(rctx->cmd));
	93	INIT_LIST_HEAD(&rctx->cmd.entry);
	94	rctx->cmd.engine = CCP_ENGINE_AES;
	95	rctx->cmd.u.aes.type = ctx->u.aes.type;
	96	rctx->cmd.u.aes.mode = ctx->u.aes.mode;
	97	rctx->cmd.u.aes.action =
	98	(encrypt) ? CCP_AES_ACTION_ENCRYPT : CCP_AES_ACTION_DECRYPT;
	99	rctx->cmd.u.aes.key = &ctx->u.aes.key_sg;
	100	rctx->cmd.u.aes.key_len = ctx->u.aes.key_len;
	101	rctx->cmd.u.aes.iv = iv_sg;
	102	rctx->cmd.u.aes.iv_len = iv_len;
	103	rctx->cmd.u.aes.src = req->src;
be9fe620	104	rctx->cmd.u.aes.src_len = req->cryptlen;
2b789435 TL	105	rctx->cmd.u.aes.dst = req->dst;
2b789435 TL	106
735efea6	107	return ccp_crypto_enqueue_request(&req->base, &rctx->cmd);
2b789435 TL	108	}
2b789435 TL	109
be9fe620	110	static int ccp_aes_encrypt(struct skcipher_request *req)
2b789435 TL	111	{
	112	return ccp_aes_crypt(req, true);
	113	}
	114
be9fe620	115	static int ccp_aes_decrypt(struct skcipher_request *req)
2b789435 TL	116	{
	117	return ccp_aes_crypt(req, false);
	118	}
	119
be9fe620	120	static int ccp_aes_init_tfm(struct crypto_skcipher *tfm)
2b789435	121	{
99c6b20e	122	struct ccp_ctx *ctx = crypto_skcipher_ctx_dma(tfm);
2b789435 TL	123
	124	ctx->complete = ccp_aes_complete;
	125	ctx->u.aes.key_len = 0;
	126
be9fe620	127	crypto_skcipher_set_reqsize(tfm, sizeof(struct ccp_aes_req_ctx));
2b789435 TL	128
	129	return 0;
	130	}
	131
2b789435 TL	132	static int ccp_aes_rfc3686_complete(struct crypto_async_request *async_req,
	133	int ret)
	134	{
be9fe620	135	struct skcipher_request *req = skcipher_request_cast(async_req);
99c6b20e	136	struct ccp_aes_req_ctx *rctx = skcipher_request_ctx_dma(req);
2b789435 TL	137
2b789435 TL	138	/* Restore the original pointer */
be9fe620	139	req->iv = rctx->rfc3686_info;
2b789435 TL	140
	141	return ccp_aes_complete(async_req, ret);
	142	}
	143
be9fe620	144	static int ccp_aes_rfc3686_setkey(struct crypto_skcipher tfm, const u8 key,
2b789435 TL	145	unsigned int key_len)
2b789435 TL	146	{
99c6b20e	147	struct ccp_ctx *ctx = crypto_skcipher_ctx_dma(tfm);
2b789435 TL	148
	149	if (key_len < CTR_RFC3686_NONCE_SIZE)
	150	return -EINVAL;
	151
	152	key_len -= CTR_RFC3686_NONCE_SIZE;
	153	memcpy(ctx->u.aes.nonce, key + key_len, CTR_RFC3686_NONCE_SIZE);
	154
	155	return ccp_aes_setkey(tfm, key, key_len);
	156	}
	157
be9fe620	158	static int ccp_aes_rfc3686_crypt(struct skcipher_request *req, bool encrypt)
2b789435	159	{
be9fe620	160	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
99c6b20e HX	161	struct ccp_ctx *ctx = crypto_skcipher_ctx_dma(tfm);
99c6b20e HX	162	struct ccp_aes_req_ctx *rctx = skcipher_request_ctx_dma(req);
2b789435 TL	163	u8 *iv;
	164
	165	/* Initialize the CTR block */
	166	iv = rctx->rfc3686_iv;
	167	memcpy(iv, ctx->u.aes.nonce, CTR_RFC3686_NONCE_SIZE);
	168
	169	iv += CTR_RFC3686_NONCE_SIZE;
be9fe620	170	memcpy(iv, req->iv, CTR_RFC3686_IV_SIZE);
2b789435 TL	171
	172	iv += CTR_RFC3686_IV_SIZE;
	173	(__be32 )iv = cpu_to_be32(1);
	174
	175	/* Point to the new IV */
be9fe620 AB	176	rctx->rfc3686_info = req->iv;
be9fe620 AB	177	req->iv = rctx->rfc3686_iv;
2b789435 TL	178
	179	return ccp_aes_crypt(req, encrypt);
	180	}
	181
be9fe620	182	static int ccp_aes_rfc3686_encrypt(struct skcipher_request *req)
2b789435 TL	183	{
	184	return ccp_aes_rfc3686_crypt(req, true);
	185	}
	186
be9fe620	187	static int ccp_aes_rfc3686_decrypt(struct skcipher_request *req)
2b789435 TL	188	{
	189	return ccp_aes_rfc3686_crypt(req, false);
	190	}
	191
be9fe620	192	static int ccp_aes_rfc3686_init_tfm(struct crypto_skcipher *tfm)
2b789435	193	{
99c6b20e	194	struct ccp_ctx *ctx = crypto_skcipher_ctx_dma(tfm);
2b789435 TL	195
	196	ctx->complete = ccp_aes_rfc3686_complete;
	197	ctx->u.aes.key_len = 0;
	198
99c6b20e	199	crypto_skcipher_set_reqsize_dma(tfm, sizeof(struct ccp_aes_req_ctx));
2b789435 TL	200
	201	return 0;
	202	}
	203
be9fe620 AB	204	static const struct skcipher_alg ccp_aes_defaults = {
	205	.setkey = ccp_aes_setkey,
	206	.encrypt = ccp_aes_encrypt,
	207	.decrypt = ccp_aes_decrypt,
	208	.min_keysize = AES_MIN_KEY_SIZE,
	209	.max_keysize = AES_MAX_KEY_SIZE,
	210	.init = ccp_aes_init_tfm,
	211
	212	.base.cra_flags = CRYPTO_ALG_ASYNC \|
b8aa7dc5	213	CRYPTO_ALG_ALLOCATES_MEMORY \|
be9fe620 AB	214	CRYPTO_ALG_KERN_DRIVER_ONLY \|
	215	CRYPTO_ALG_NEED_FALLBACK,
	216	.base.cra_blocksize = AES_BLOCK_SIZE,
99c6b20e	217	.base.cra_ctxsize = sizeof(struct ccp_ctx) + CRYPTO_DMA_PADDING,
be9fe620 AB	218	.base.cra_priority = CCP_CRA_PRIORITY,
be9fe620 AB	219	.base.cra_module = THIS_MODULE,
2b789435 TL	220	};
2b789435 TL	221
be9fe620 AB	222	static const struct skcipher_alg ccp_aes_rfc3686_defaults = {
	223	.setkey = ccp_aes_rfc3686_setkey,
	224	.encrypt = ccp_aes_rfc3686_encrypt,
	225	.decrypt = ccp_aes_rfc3686_decrypt,
	226	.min_keysize = AES_MIN_KEY_SIZE + CTR_RFC3686_NONCE_SIZE,
	227	.max_keysize = AES_MAX_KEY_SIZE + CTR_RFC3686_NONCE_SIZE,
	228	.init = ccp_aes_rfc3686_init_tfm,
	229
	230	.base.cra_flags = CRYPTO_ALG_ASYNC \|
b8aa7dc5	231	CRYPTO_ALG_ALLOCATES_MEMORY \|
be9fe620 AB	232	CRYPTO_ALG_KERN_DRIVER_ONLY \|
	233	CRYPTO_ALG_NEED_FALLBACK,
	234	.base.cra_blocksize = CTR_RFC3686_BLOCK_SIZE,
99c6b20e	235	.base.cra_ctxsize = sizeof(struct ccp_ctx) + CRYPTO_DMA_PADDING,
be9fe620 AB	236	.base.cra_priority = CCP_CRA_PRIORITY,
be9fe620 AB	237	.base.cra_module = THIS_MODULE,
2b789435 TL	238	};
	239
	240	struct ccp_aes_def {
	241	enum ccp_aes_mode mode;
c7019c4d	242	unsigned int version;
2b789435 TL	243	const char *name;
	244	const char *driver_name;
	245	unsigned int blocksize;
	246	unsigned int ivsize;
be9fe620	247	const struct skcipher_alg *alg_defaults;
2b789435 TL	248	};
	249
	250	static struct ccp_aes_def aes_algs[] = {
	251	{
	252	.mode = CCP_AES_MODE_ECB,
c7019c4d	253	.version = CCP_VERSION(3, 0),
2b789435 TL	254	.name = "ecb(aes)",
	255	.driver_name = "ecb-aes-ccp",
	256	.blocksize = AES_BLOCK_SIZE,
	257	.ivsize = 0,
	258	.alg_defaults = &ccp_aes_defaults,
	259	},
	260	{
	261	.mode = CCP_AES_MODE_CBC,
c7019c4d	262	.version = CCP_VERSION(3, 0),
2b789435 TL	263	.name = "cbc(aes)",
	264	.driver_name = "cbc-aes-ccp",
	265	.blocksize = AES_BLOCK_SIZE,
	266	.ivsize = AES_BLOCK_SIZE,
	267	.alg_defaults = &ccp_aes_defaults,
	268	},
2b789435 TL	269	{
2b789435 TL	270	.mode = CCP_AES_MODE_CTR,
c7019c4d	271	.version = CCP_VERSION(3, 0),
2b789435 TL	272	.name = "ctr(aes)",
	273	.driver_name = "ctr-aes-ccp",
	274	.blocksize = 1,
	275	.ivsize = AES_BLOCK_SIZE,
	276	.alg_defaults = &ccp_aes_defaults,
	277	},
	278	{
	279	.mode = CCP_AES_MODE_CTR,
c7019c4d	280	.version = CCP_VERSION(3, 0),
2b789435 TL	281	.name = "rfc3686(ctr(aes))",
	282	.driver_name = "rfc3686-ctr-aes-ccp",
	283	.blocksize = 1,
	284	.ivsize = CTR_RFC3686_IV_SIZE,
	285	.alg_defaults = &ccp_aes_rfc3686_defaults,
	286	},
	287	};
	288
	289	static int ccp_register_aes_alg(struct list_head *head,
	290	const struct ccp_aes_def *def)
	291	{
be9fe620 AB	292	struct ccp_crypto_skcipher_alg *ccp_alg;
be9fe620 AB	293	struct skcipher_alg *alg;
2b789435 TL	294	int ret;
	295
	296	ccp_alg = kzalloc(sizeof(*ccp_alg), GFP_KERNEL);
	297	if (!ccp_alg)
	298	return -ENOMEM;
	299
	300	INIT_LIST_HEAD(&ccp_alg->entry);
	301
	302	ccp_alg->mode = def->mode;
	303
	304	/* Copy the defaults and override as necessary */
	305	alg = &ccp_alg->alg;
d1dd206c	306	alg = def->alg_defaults;
be9fe620 AB	307	snprintf(alg->base.cra_name, CRYPTO_MAX_ALG_NAME, "%s", def->name);
be9fe620 AB	308	snprintf(alg->base.cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s",
2b789435	309	def->driver_name);
be9fe620 AB	310	alg->base.cra_blocksize = def->blocksize;
be9fe620 AB	311	alg->ivsize = def->ivsize;
2b789435	312
be9fe620	313	ret = crypto_register_skcipher(alg);
2b789435	314	if (ret) {
be9fe620 AB	315	pr_err("%s skcipher algorithm registration error (%d)\n",
be9fe620 AB	316	alg->base.cra_name, ret);
2b789435 TL	317	kfree(ccp_alg);
	318	return ret;
	319	}
	320
	321	list_add(&ccp_alg->entry, head);
	322
	323	return 0;
	324	}
	325
	326	int ccp_register_aes_algs(struct list_head *head)
	327	{
	328	int i, ret;
c7019c4d	329	unsigned int ccpversion = ccp_version();
2b789435 TL	330
2b789435 TL	331	for (i = 0; i < ARRAY_SIZE(aes_algs); i++) {
c7019c4d GH	332	if (aes_algs[i].version > ccpversion)
c7019c4d GH	333	continue;
2b789435 TL	334	ret = ccp_register_aes_alg(head, &aes_algs[i]);
	335	if (ret)
	336	return ret;
	337	}
	338
	339	return 0;
	340	}