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

/*
 * AMD Cryptographic Coprocessor (CCP) AES crypto API support
 *
 * Copyright (C) 2013 Advanced Micro Devices, Inc.
 *
 * Author: Tom Lendacky <thomas.lendacky@amd.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#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 ablkcipher_request *req = ablkcipher_request_cast(async_req);
	struct ccp_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
	struct ccp_aes_req_ctx *rctx = ablkcipher_request_ctx(req);

	if (ret)
		return ret;

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

	return 0;
}

static int ccp_aes_setkey(struct crypto_ablkcipher *tfm, const u8 *key,
			  unsigned int key_len)
{
	struct ccp_ctx *ctx = crypto_tfm_ctx(crypto_ablkcipher_tfm(tfm));
	struct ccp_crypto_ablkcipher_alg *alg =
		ccp_crypto_ablkcipher_alg(crypto_ablkcipher_tfm(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:
		crypto_ablkcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
		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 ablkcipher_request *req, bool encrypt)
{
	struct ccp_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
	struct ccp_aes_req_ctx *rctx = ablkcipher_request_ctx(req);
	struct scatterlist *iv_sg = NULL;
	unsigned int iv_len = 0;
	int ret;

	if (!ctx->u.aes.key_len) {
		pr_err("AES key not set\n");
		return -EINVAL;
	}

	if (((ctx->u.aes.mode == CCP_AES_MODE_ECB) ||
	     (ctx->u.aes.mode == CCP_AES_MODE_CBC) ||
	     (ctx->u.aes.mode == CCP_AES_MODE_CFB)) &&
	    (req->nbytes & (AES_BLOCK_SIZE - 1))) {
		pr_err("AES request size is not a multiple of the block size\n");
		return -EINVAL;
	}

	if (ctx->u.aes.mode != CCP_AES_MODE_ECB) {
		if (!req->info) {
			pr_err("AES IV not supplied");
			return -EINVAL;
		}

		memcpy(rctx->iv, req->info, 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->nbytes;
	rctx->cmd.u.aes.dst = req->dst;

	ret = ccp_crypto_enqueue_request(&req->base, &rctx->cmd);

	return ret;
}

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

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

static int ccp_aes_cra_init(struct crypto_tfm *tfm)
{
	struct ccp_ctx *ctx = crypto_tfm_ctx(tfm);

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

	tfm->crt_ablkcipher.reqsize = sizeof(struct ccp_aes_req_ctx);

	return 0;
}

static void ccp_aes_cra_exit(struct crypto_tfm *tfm)
{
}

static int ccp_aes_rfc3686_complete(struct crypto_async_request *async_req,
				    int ret)
{
	struct ablkcipher_request *req = ablkcipher_request_cast(async_req);
	struct ccp_aes_req_ctx *rctx = ablkcipher_request_ctx(req);

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

	return ccp_aes_complete(async_req, ret);
}

static int ccp_aes_rfc3686_setkey(struct crypto_ablkcipher *tfm, const u8 *key,
				  unsigned int key_len)
{
	struct ccp_ctx *ctx = crypto_tfm_ctx(crypto_ablkcipher_tfm(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 ablkcipher_request *req, bool encrypt)
{
	struct ccp_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
	struct ccp_aes_req_ctx *rctx = ablkcipher_request_ctx(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->info, CTR_RFC3686_IV_SIZE);

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

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

	return ccp_aes_crypt(req, encrypt);
}

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

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

static int ccp_aes_rfc3686_cra_init(struct crypto_tfm *tfm)
{
	struct ccp_ctx *ctx = crypto_tfm_ctx(tfm);

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

	tfm->crt_ablkcipher.reqsize = sizeof(struct ccp_aes_req_ctx);

	return 0;
}

static void ccp_aes_rfc3686_cra_exit(struct crypto_tfm *tfm)
{
}

static struct crypto_alg ccp_aes_defaults = {
	.cra_flags	= CRYPTO_ALG_TYPE_ABLKCIPHER |
			  CRYPTO_ALG_ASYNC |
			  CRYPTO_ALG_KERN_DRIVER_ONLY |
			  CRYPTO_ALG_NEED_FALLBACK,
	.cra_blocksize	= AES_BLOCK_SIZE,
	.cra_ctxsize	= sizeof(struct ccp_ctx),
	.cra_priority	= CCP_CRA_PRIORITY,
	.cra_type	= &crypto_ablkcipher_type,
	.cra_init	= ccp_aes_cra_init,
	.cra_exit	= ccp_aes_cra_exit,
	.cra_module	= THIS_MODULE,
	.cra_ablkcipher	= {
		.setkey		= ccp_aes_setkey,
		.encrypt	= ccp_aes_encrypt,
		.decrypt	= ccp_aes_decrypt,
		.min_keysize	= AES_MIN_KEY_SIZE,
		.max_keysize	= AES_MAX_KEY_SIZE,
	},
};

static struct crypto_alg ccp_aes_rfc3686_defaults = {
	.cra_flags	= CRYPTO_ALG_TYPE_ABLKCIPHER |
			   CRYPTO_ALG_ASYNC |
			   CRYPTO_ALG_KERN_DRIVER_ONLY |
			   CRYPTO_ALG_NEED_FALLBACK,
	.cra_blocksize	= CTR_RFC3686_BLOCK_SIZE,
	.cra_ctxsize	= sizeof(struct ccp_ctx),
	.cra_priority	= CCP_CRA_PRIORITY,
	.cra_type	= &crypto_ablkcipher_type,
	.cra_init	= ccp_aes_rfc3686_cra_init,
	.cra_exit	= ccp_aes_rfc3686_cra_exit,
	.cra_module	= THIS_MODULE,
	.cra_ablkcipher	= {
		.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,
	},
};

struct ccp_aes_def {
	enum ccp_aes_mode mode;
	const char *name;
	const char *driver_name;
	unsigned int blocksize;
	unsigned int ivsize;
	struct crypto_alg *alg_defaults;
};

static struct ccp_aes_def aes_algs[] = {
	{
		.mode		= CCP_AES_MODE_ECB,
		.name		= "ecb(aes)",
		.driver_name	= "ecb-aes-ccp",
		.blocksize	= AES_BLOCK_SIZE,
		.ivsize		= 0,
		.alg_defaults	= &ccp_aes_defaults,
	},
	{
		.mode		= CCP_AES_MODE_CBC,
		.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_CFB,
		.name		= "cfb(aes)",
		.driver_name	= "cfb-aes-ccp",
		.blocksize	= AES_BLOCK_SIZE,
		.ivsize		= AES_BLOCK_SIZE,
		.alg_defaults	= &ccp_aes_defaults,
	},
	{
		.mode		= CCP_AES_MODE_OFB,
		.name		= "ofb(aes)",
		.driver_name	= "ofb-aes-ccp",
		.blocksize	= 1,
		.ivsize		= AES_BLOCK_SIZE,
		.alg_defaults	= &ccp_aes_defaults,
	},
	{
		.mode		= CCP_AES_MODE_CTR,
		.name		= "ctr(aes)",
		.driver_name	= "ctr-aes-ccp",
		.blocksize	= 1,
		.ivsize		= AES_BLOCK_SIZE,
		.alg_defaults	= &ccp_aes_defaults,
	},
	{
		.mode		= CCP_AES_MODE_CTR,
		.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_ablkcipher_alg *ccp_alg;
	struct crypto_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->cra_name, CRYPTO_MAX_ALG_NAME, "%s", def->name);
	snprintf(alg->cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s",
		 def->driver_name);
	alg->cra_blocksize = def->blocksize;
	alg->cra_ablkcipher.ivsize = def->ivsize;

	ret = crypto_register_alg(alg);
	if (ret) {
		pr_err("%s ablkcipher algorithm registration error (%d)\n",
			alg->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;

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

	return 0;
}
Commit	Line	Data
2b789435 TL	1	/*
	2	* AMD Cryptographic Coprocessor (CCP) AES crypto API support
	3	*
	4	* Copyright (C) 2013 Advanced Micro Devices, Inc.
	5	*
	6	* Author: Tom Lendacky <thomas.lendacky@amd.com>
	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation.
	11	*/
	12
	13	#include <linux/module.h>
	14	#include <linux/sched.h>
	15	#include <linux/delay.h>
	16	#include <linux/scatterlist.h>
	17	#include <linux/crypto.h>
	18	#include <crypto/algapi.h>
	19	#include <crypto/aes.h>
	20	#include <crypto/ctr.h>
	21	#include <crypto/scatterwalk.h>
	22
	23	#include "ccp-crypto.h"
	24
	25
	26	static int ccp_aes_complete(struct crypto_async_request *async_req, int ret)
	27	{
	28	struct ablkcipher_request *req = ablkcipher_request_cast(async_req);
	29	struct ccp_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
	30	struct ccp_aes_req_ctx *rctx = ablkcipher_request_ctx(req);
	31
	32	if (ret)
	33	return ret;
	34
	35	if (ctx->u.aes.mode != CCP_AES_MODE_ECB)
	36	memcpy(req->info, rctx->iv, AES_BLOCK_SIZE);
	37
	38	return 0;
	39	}
	40
	41	static int ccp_aes_setkey(struct crypto_ablkcipher tfm, const u8 key,
	42	unsigned int key_len)
	43	{
	44	struct ccp_ctx *ctx = crypto_tfm_ctx(crypto_ablkcipher_tfm(tfm));
	45	struct ccp_crypto_ablkcipher_alg *alg =
	46	ccp_crypto_ablkcipher_alg(crypto_ablkcipher_tfm(tfm));
	47
	48	switch (key_len) {
	49	case AES_KEYSIZE_128:
	50	ctx->u.aes.type = CCP_AES_TYPE_128;
	51	break;
	52	case AES_KEYSIZE_192:
	53	ctx->u.aes.type = CCP_AES_TYPE_192;
	54	break;
	55	case AES_KEYSIZE_256:
	56	ctx->u.aes.type = CCP_AES_TYPE_256;
	57	break;
	58	default:
	59	crypto_ablkcipher_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
	60	return -EINVAL;
	61	}
	62	ctx->u.aes.mode = alg->mode;
	63	ctx->u.aes.key_len = key_len;
	64
65	memcpy(ctx->u.aes.key, key, key_len);
66	sg_init_one(&ctx->u.aes.key_sg, ctx->u.aes.key, key_len);
67
68	return 0;
69	}
70
71	static int ccp_aes_crypt(struct ablkcipher_request *req, bool encrypt)
72	{
73	struct ccp_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
74	struct ccp_aes_req_ctx *rctx = ablkcipher_request_ctx(req);
75	struct scatterlist *iv_sg = NULL;
76	unsigned int iv_len = 0;
77	int ret;
78
79	if (!ctx->u.aes.key_len) {
80	pr_err("AES key not set\n");
81	return -EINVAL;
82	}
83
84	if (((ctx->u.aes.mode == CCP_AES_MODE_ECB) \|\|
85	(ctx->u.aes.mode == CCP_AES_MODE_CBC) \|\|
86	(ctx->u.aes.mode == CCP_AES_MODE_CFB)) &&
87	(req->nbytes & (AES_BLOCK_SIZE - 1))) {
88	pr_err("AES request size is not a multiple of the block size\n");
89	return -EINVAL;
90	}
91
92	if (ctx->u.aes.mode != CCP_AES_MODE_ECB) {
93	if (!req->info) {
94	pr_err("AES IV not supplied");
95	return -EINVAL;
96	}
97
98	memcpy(rctx->iv, req->info, AES_BLOCK_SIZE);
99	iv_sg = &rctx->iv_sg;
100	iv_len = AES_BLOCK_SIZE;
101	sg_init_one(iv_sg, rctx->iv, iv_len);
102	}
103
104	memset(&rctx->cmd, 0, sizeof(rctx->cmd));
105	INIT_LIST_HEAD(&rctx->cmd.entry);
106	rctx->cmd.engine = CCP_ENGINE_AES;
107	rctx->cmd.u.aes.type = ctx->u.aes.type;
108	rctx->cmd.u.aes.mode = ctx->u.aes.mode;
109	rctx->cmd.u.aes.action =
110	(encrypt) ? CCP_AES_ACTION_ENCRYPT : CCP_AES_ACTION_DECRYPT;
111	rctx->cmd.u.aes.key = &ctx->u.aes.key_sg;
112	rctx->cmd.u.aes.key_len = ctx->u.aes.key_len;
113	rctx->cmd.u.aes.iv = iv_sg;
114	rctx->cmd.u.aes.iv_len = iv_len;
115	rctx->cmd.u.aes.src = req->src;
116	rctx->cmd.u.aes.src_len = req->nbytes;
117	rctx->cmd.u.aes.dst = req->dst;
118
119	ret = ccp_crypto_enqueue_request(&req->base, &rctx->cmd);
120
121	return ret;
122	}
123
124	static int ccp_aes_encrypt(struct ablkcipher_request *req)
125	{
126	return ccp_aes_crypt(req, true);
127	}
128
129	static int ccp_aes_decrypt(struct ablkcipher_request *req)
130	{
131	return ccp_aes_crypt(req, false);
132	}
133
134	static int ccp_aes_cra_init(struct crypto_tfm *tfm)
135	{
136	struct ccp_ctx *ctx = crypto_tfm_ctx(tfm);
137
138	ctx->complete = ccp_aes_complete;
139	ctx->u.aes.key_len = 0;
140
141	tfm->crt_ablkcipher.reqsize = sizeof(struct ccp_aes_req_ctx);
142
143	return 0;
144	}
145
146	static void ccp_aes_cra_exit(struct crypto_tfm *tfm)
147	{
148	}
149
150	static int ccp_aes_rfc3686_complete(struct crypto_async_request *async_req,
151	int ret)
152	{
153	struct ablkcipher_request *req = ablkcipher_request_cast(async_req);
154	struct ccp_aes_req_ctx *rctx = ablkcipher_request_ctx(req);
155
156	/* Restore the original pointer */
157	req->info = rctx->rfc3686_info;
158
159	return ccp_aes_complete(async_req, ret);
160	}
161
162	static int ccp_aes_rfc3686_setkey(struct crypto_ablkcipher tfm, const u8 key,
163	unsigned int key_len)
164	{
165	struct ccp_ctx *ctx = crypto_tfm_ctx(crypto_ablkcipher_tfm(tfm));
166
167	if (key_len < CTR_RFC3686_NONCE_SIZE)
168	return -EINVAL;
169
170	key_len -= CTR_RFC3686_NONCE_SIZE;
171	memcpy(ctx->u.aes.nonce, key + key_len, CTR_RFC3686_NONCE_SIZE);
172
173	return ccp_aes_setkey(tfm, key, key_len);
174	}
175
176	static int ccp_aes_rfc3686_crypt(struct ablkcipher_request *req, bool encrypt)
177	{
178	struct ccp_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
179	struct ccp_aes_req_ctx *rctx = ablkcipher_request_ctx(req);
180	u8 *iv;
181
182	/* Initialize the CTR block */
183	iv = rctx->rfc3686_iv;
184	memcpy(iv, ctx->u.aes.nonce, CTR_RFC3686_NONCE_SIZE);
185
186	iv += CTR_RFC3686_NONCE_SIZE;
187	memcpy(iv, req->info, CTR_RFC3686_IV_SIZE);
188
189	iv += CTR_RFC3686_IV_SIZE;
190	(__be32 )iv = cpu_to_be32(1);
191
192	/* Point to the new IV */
193	rctx->rfc3686_info = req->info;
194	req->info = rctx->rfc3686_iv;
195
196	return ccp_aes_crypt(req, encrypt);
197	}
198
199	static int ccp_aes_rfc3686_encrypt(struct ablkcipher_request *req)
200	{
201	return ccp_aes_rfc3686_crypt(req, true);
202	}
203
204	static int ccp_aes_rfc3686_decrypt(struct ablkcipher_request *req)
205	{
206	return ccp_aes_rfc3686_crypt(req, false);
207	}
208
209	static int ccp_aes_rfc3686_cra_init(struct crypto_tfm *tfm)
210	{
211	struct ccp_ctx *ctx = crypto_tfm_ctx(tfm);
212
213	ctx->complete = ccp_aes_rfc3686_complete;
214	ctx->u.aes.key_len = 0;
215
216	tfm->crt_ablkcipher.reqsize = sizeof(struct ccp_aes_req_ctx);
217
218	return 0;
219	}
220
221	static void ccp_aes_rfc3686_cra_exit(struct crypto_tfm *tfm)
222	{
223	}
224
225	static struct crypto_alg ccp_aes_defaults = {
226	.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER \|
227	CRYPTO_ALG_ASYNC \|
228	CRYPTO_ALG_KERN_DRIVER_ONLY \|
229	CRYPTO_ALG_NEED_FALLBACK,
230	.cra_blocksize = AES_BLOCK_SIZE,
231	.cra_ctxsize = sizeof(struct ccp_ctx),
232	.cra_priority = CCP_CRA_PRIORITY,
233	.cra_type = &crypto_ablkcipher_type,
234	.cra_init = ccp_aes_cra_init,
235	.cra_exit = ccp_aes_cra_exit,
236	.cra_module = THIS_MODULE,
237	.cra_ablkcipher = {
238	.setkey = ccp_aes_setkey,
239	.encrypt = ccp_aes_encrypt,
240	.decrypt = ccp_aes_decrypt,
241	.min_keysize = AES_MIN_KEY_SIZE,
242	.max_keysize = AES_MAX_KEY_SIZE,
243	},
244	};
245
246	static struct crypto_alg ccp_aes_rfc3686_defaults = {
247	.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER \|
248	CRYPTO_ALG_ASYNC \|
249	CRYPTO_ALG_KERN_DRIVER_ONLY \|
250	CRYPTO_ALG_NEED_FALLBACK,
251	.cra_blocksize = CTR_RFC3686_BLOCK_SIZE,
252	.cra_ctxsize = sizeof(struct ccp_ctx),
253	.cra_priority = CCP_CRA_PRIORITY,
254	.cra_type = &crypto_ablkcipher_type,
255	.cra_init = ccp_aes_rfc3686_cra_init,
256	.cra_exit = ccp_aes_rfc3686_cra_exit,
257	.cra_module = THIS_MODULE,
258	.cra_ablkcipher = {
259	.setkey = ccp_aes_rfc3686_setkey,
260	.encrypt = ccp_aes_rfc3686_encrypt,
261	.decrypt = ccp_aes_rfc3686_decrypt,
262	.min_keysize = AES_MIN_KEY_SIZE + CTR_RFC3686_NONCE_SIZE,
263	.max_keysize = AES_MAX_KEY_SIZE + CTR_RFC3686_NONCE_SIZE,
264	},
265	};
266
267	struct ccp_aes_def {
268	enum ccp_aes_mode mode;
269	const char *name;
270	const char *driver_name;
271	unsigned int blocksize;
272	unsigned int ivsize;
273	struct crypto_alg *alg_defaults;
274	};
275
276	static struct ccp_aes_def aes_algs[] = {
277	{
278	.mode = CCP_AES_MODE_ECB,
279	.name = "ecb(aes)",
280	.driver_name = "ecb-aes-ccp",
281	.blocksize = AES_BLOCK_SIZE,
282	.ivsize = 0,
283	.alg_defaults = &ccp_aes_defaults,
284	},
285	{
286	.mode = CCP_AES_MODE_CBC,
287	.name = "cbc(aes)",
288	.driver_name = "cbc-aes-ccp",
289	.blocksize = AES_BLOCK_SIZE,
290	.ivsize = AES_BLOCK_SIZE,
291	.alg_defaults = &ccp_aes_defaults,
292	},
293	{
294	.mode = CCP_AES_MODE_CFB,
295	.name = "cfb(aes)",
296	.driver_name = "cfb-aes-ccp",
297	.blocksize = AES_BLOCK_SIZE,
298	.ivsize = AES_BLOCK_SIZE,
299	.alg_defaults = &ccp_aes_defaults,
300	},
301	{
302	.mode = CCP_AES_MODE_OFB,
303	.name = "ofb(aes)",
304	.driver_name = "ofb-aes-ccp",
305	.blocksize = 1,
306	.ivsize = AES_BLOCK_SIZE,
307	.alg_defaults = &ccp_aes_defaults,
308	},
309	{
310	.mode = CCP_AES_MODE_CTR,
311	.name = "ctr(aes)",
312	.driver_name = "ctr-aes-ccp",
313	.blocksize = 1,
314	.ivsize = AES_BLOCK_SIZE,
315	.alg_defaults = &ccp_aes_defaults,
316	},
317	{
318	.mode = CCP_AES_MODE_CTR,
319	.name = "rfc3686(ctr(aes))",
320	.driver_name = "rfc3686-ctr-aes-ccp",
321	.blocksize = 1,
322	.ivsize = CTR_RFC3686_IV_SIZE,
323	.alg_defaults = &ccp_aes_rfc3686_defaults,
324	},
325	};
326
327	static int ccp_register_aes_alg(struct list_head *head,
328	const struct ccp_aes_def *def)
329	{
330	struct ccp_crypto_ablkcipher_alg *ccp_alg;
331	struct crypto_alg *alg;
332	int ret;
333
334	ccp_alg = kzalloc(sizeof(*ccp_alg), GFP_KERNEL);
335	if (!ccp_alg)
336	return -ENOMEM;
337
338	INIT_LIST_HEAD(&ccp_alg->entry);
339
340	ccp_alg->mode = def->mode;
341
342	/* Copy the defaults and override as necessary */
343	alg = &ccp_alg->alg;
d1dd206c	344	alg = def->alg_defaults;
2b789435 TL	345	snprintf(alg->cra_name, CRYPTO_MAX_ALG_NAME, "%s", def->name);
	346	snprintf(alg->cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s",
	347	def->driver_name);
	348	alg->cra_blocksize = def->blocksize;
	349	alg->cra_ablkcipher.ivsize = def->ivsize;
	350
	351	ret = crypto_register_alg(alg);
	352	if (ret) {
	353	pr_err("%s ablkcipher algorithm registration error (%d)\n",
	354	alg->cra_name, ret);
	355	kfree(ccp_alg);
	356	return ret;
	357	}
	358
	359	list_add(&ccp_alg->entry, head);
	360
	361	return 0;
	362	}
	363
	364	int ccp_register_aes_algs(struct list_head *head)
	365	{
	366	int i, ret;
	367
	368	for (i = 0; i < ARRAY_SIZE(aes_algs); i++) {
	369	ret = ccp_register_aes_alg(head, &aes_algs[i]);
	370	if (ret)
	371	return ret;
	372	}
	373
	374	return 0;
	375	}