[mirror_ubuntu-hirsute-kernel.git] / drivers / crypto / ccp / ccp-crypto-des3.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * AMD Cryptographic Coprocessor (CCP) DES3 crypto API support
 *
 * Copyright (C) 2016,2017 Advanced Micro Devices, Inc.
 *
 * Author: Gary R Hook <ghook@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/scatterwalk.h>
#include <crypto/des.h>

#include "ccp-crypto.h"

static int ccp_des3_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_des3_req_ctx *rctx = ablkcipher_request_ctx(req);

	if (ret)
		return ret;

	if (ctx->u.des3.mode != CCP_DES3_MODE_ECB)
		memcpy(req->info, rctx->iv, DES3_EDE_BLOCK_SIZE);

	return 0;
}

static int ccp_des3_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));
	u32 *flags = &tfm->base.crt_flags;
	int err;

	err = __des3_verify_key(flags, key);
	if (unlikely(err))
		return err;

	/* It's not clear that there is any support for a keysize of 112.
	 * If needed, the caller should make K1 == K3
	 */
	ctx->u.des3.type = CCP_DES3_TYPE_168;
	ctx->u.des3.mode = alg->mode;
	ctx->u.des3.key_len = key_len;

	memcpy(ctx->u.des3.key, key, key_len);
	sg_init_one(&ctx->u.des3.key_sg, ctx->u.des3.key, key_len);

	return 0;
}

static int ccp_des3_crypt(struct ablkcipher_request *req, bool encrypt)
{
	struct ccp_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
	struct ccp_des3_req_ctx *rctx = ablkcipher_request_ctx(req);
	struct scatterlist *iv_sg = NULL;
	unsigned int iv_len = 0;
	int ret;

	if (!ctx->u.des3.key_len)
		return -EINVAL;

	if (((ctx->u.des3.mode == CCP_DES3_MODE_ECB) ||
	     (ctx->u.des3.mode == CCP_DES3_MODE_CBC)) &&
	    (req->nbytes & (DES3_EDE_BLOCK_SIZE - 1)))
		return -EINVAL;

	if (ctx->u.des3.mode != CCP_DES3_MODE_ECB) {
		if (!req->info)
			return -EINVAL;

		memcpy(rctx->iv, req->info, DES3_EDE_BLOCK_SIZE);
		iv_sg = &rctx->iv_sg;
		iv_len = DES3_EDE_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_DES3;
	rctx->cmd.u.des3.type = ctx->u.des3.type;
	rctx->cmd.u.des3.mode = ctx->u.des3.mode;
	rctx->cmd.u.des3.action = (encrypt)
				  ? CCP_DES3_ACTION_ENCRYPT
				  : CCP_DES3_ACTION_DECRYPT;
	rctx->cmd.u.des3.key = &ctx->u.des3.key_sg;
	rctx->cmd.u.des3.key_len = ctx->u.des3.key_len;
	rctx->cmd.u.des3.iv = iv_sg;
	rctx->cmd.u.des3.iv_len = iv_len;
	rctx->cmd.u.des3.src = req->src;
	rctx->cmd.u.des3.src_len = req->nbytes;
	rctx->cmd.u.des3.dst = req->dst;

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

	return ret;
}

static int ccp_des3_encrypt(struct ablkcipher_request *req)
{
	return ccp_des3_crypt(req, true);
}

static int ccp_des3_decrypt(struct ablkcipher_request *req)
{
	return ccp_des3_crypt(req, false);
}

static int ccp_des3_cra_init(struct crypto_tfm *tfm)
{
	struct ccp_ctx *ctx = crypto_tfm_ctx(tfm);

	ctx->complete = ccp_des3_complete;
	ctx->u.des3.key_len = 0;

	tfm->crt_ablkcipher.reqsize = sizeof(struct ccp_des3_req_ctx);

	return 0;
}

static void ccp_des3_cra_exit(struct crypto_tfm *tfm)
{
}

static struct crypto_alg ccp_des3_defaults = {
	.cra_flags	= CRYPTO_ALG_TYPE_ABLKCIPHER |
		CRYPTO_ALG_ASYNC |
		CRYPTO_ALG_KERN_DRIVER_ONLY |
		CRYPTO_ALG_NEED_FALLBACK,
	.cra_blocksize	= DES3_EDE_BLOCK_SIZE,
	.cra_ctxsize	= sizeof(struct ccp_ctx),
	.cra_priority	= CCP_CRA_PRIORITY,
	.cra_type	= &crypto_ablkcipher_type,
	.cra_init	= ccp_des3_cra_init,
	.cra_exit	= ccp_des3_cra_exit,
	.cra_module	= THIS_MODULE,
	.cra_ablkcipher	= {
		.setkey		= ccp_des3_setkey,
		.encrypt	= ccp_des3_encrypt,
		.decrypt	= ccp_des3_decrypt,
		.min_keysize	= DES3_EDE_KEY_SIZE,
		.max_keysize	= DES3_EDE_KEY_SIZE,
	},
};

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;
	struct crypto_alg *alg_defaults;
};

static 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_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_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;
}
Commit	Line	Data
d2912cb1	1	// SPDX-License-Identifier: GPL-2.0-only
990672d4 GH	2	/*
	3	* AMD Cryptographic Coprocessor (CCP) DES3 crypto API support
	4	*
68cc652f	5	* Copyright (C) 2016,2017 Advanced Micro Devices, Inc.
990672d4 GH	6	*
990672d4 GH	7	* Author: Gary R Hook <ghook@amd.com>
990672d4 GH	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/scatterwalk.h>
	17	#include <crypto/des.h>
	18
	19	#include "ccp-crypto.h"
	20
	21	static int ccp_des3_complete(struct crypto_async_request *async_req, int ret)
	22	{
	23	struct ablkcipher_request *req = ablkcipher_request_cast(async_req);
	24	struct ccp_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
	25	struct ccp_des3_req_ctx *rctx = ablkcipher_request_ctx(req);
	26
	27	if (ret)
	28	return ret;
	29
	30	if (ctx->u.des3.mode != CCP_DES3_MODE_ECB)
	31	memcpy(req->info, rctx->iv, DES3_EDE_BLOCK_SIZE);
	32
	33	return 0;
	34	}
	35
	36	static int ccp_des3_setkey(struct crypto_ablkcipher tfm, const u8 key,
	37	unsigned int key_len)
	38	{
	39	struct ccp_ctx *ctx = crypto_tfm_ctx(crypto_ablkcipher_tfm(tfm));
	40	struct ccp_crypto_ablkcipher_alg *alg =
	41	ccp_crypto_ablkcipher_alg(crypto_ablkcipher_tfm(tfm));
	42	u32 *flags = &tfm->base.crt_flags;
76a329cd	43	int err;
990672d4	44
76a329cd HX	45	err = __des3_verify_key(flags, key);
	46	if (unlikely(err))
	47	return err;
990672d4 GH	48
	49	/* It's not clear that there is any support for a keysize of 112.
	50	* If needed, the caller should make K1 == K3
	51	*/
	52	ctx->u.des3.type = CCP_DES3_TYPE_168;
	53	ctx->u.des3.mode = alg->mode;
	54	ctx->u.des3.key_len = key_len;
	55
	56	memcpy(ctx->u.des3.key, key, key_len);
	57	sg_init_one(&ctx->u.des3.key_sg, ctx->u.des3.key, key_len);
	58
	59	return 0;
	60	}
	61
	62	static int ccp_des3_crypt(struct ablkcipher_request *req, bool encrypt)
	63	{
	64	struct ccp_ctx *ctx = crypto_tfm_ctx(req->base.tfm);
	65	struct ccp_des3_req_ctx *rctx = ablkcipher_request_ctx(req);
	66	struct scatterlist *iv_sg = NULL;
	67	unsigned int iv_len = 0;
	68	int ret;
	69
	70	if (!ctx->u.des3.key_len)
	71	return -EINVAL;
	72
	73	if (((ctx->u.des3.mode == CCP_DES3_MODE_ECB) \|\|
	74	(ctx->u.des3.mode == CCP_DES3_MODE_CBC)) &&
	75	(req->nbytes & (DES3_EDE_BLOCK_SIZE - 1)))
	76	return -EINVAL;
	77
	78	if (ctx->u.des3.mode != CCP_DES3_MODE_ECB) {
	79	if (!req->info)
	80	return -EINVAL;
	81
	82	memcpy(rctx->iv, req->info, DES3_EDE_BLOCK_SIZE);
	83	iv_sg = &rctx->iv_sg;
	84	iv_len = DES3_EDE_BLOCK_SIZE;
	85	sg_init_one(iv_sg, rctx->iv, iv_len);
	86	}
	87
	88	memset(&rctx->cmd, 0, sizeof(rctx->cmd));
	89	INIT_LIST_HEAD(&rctx->cmd.entry);
	90	rctx->cmd.engine = CCP_ENGINE_DES3;
	91	rctx->cmd.u.des3.type = ctx->u.des3.type;
	92	rctx->cmd.u.des3.mode = ctx->u.des3.mode;
	93	rctx->cmd.u.des3.action = (encrypt)
	94	? CCP_DES3_ACTION_ENCRYPT
	95	: CCP_DES3_ACTION_DECRYPT;
	96	rctx->cmd.u.des3.key = &ctx->u.des3.key_sg;
	97	rctx->cmd.u.des3.key_len = ctx->u.des3.key_len;
	98	rctx->cmd.u.des3.iv = iv_sg;
	99	rctx->cmd.u.des3.iv_len = iv_len;
	100	rctx->cmd.u.des3.src = req->src;
	101	rctx->cmd.u.des3.src_len = req->nbytes;
	102	rctx->cmd.u.des3.dst = req->dst;
	103
	104	ret = ccp_crypto_enqueue_request(&req->base, &rctx->cmd);
	105
	106	return ret;
	107	}
	108
	109	static int ccp_des3_encrypt(struct ablkcipher_request *req)
	110	{
	111	return ccp_des3_crypt(req, true);
112	}
113
114	static int ccp_des3_decrypt(struct ablkcipher_request *req)
115	{
116	return ccp_des3_crypt(req, false);
117	}
118
119	static int ccp_des3_cra_init(struct crypto_tfm *tfm)
120	{
121	struct ccp_ctx *ctx = crypto_tfm_ctx(tfm);
122
123	ctx->complete = ccp_des3_complete;
124	ctx->u.des3.key_len = 0;
125
126	tfm->crt_ablkcipher.reqsize = sizeof(struct ccp_des3_req_ctx);
127
128	return 0;
129	}
130
131	static void ccp_des3_cra_exit(struct crypto_tfm *tfm)
132	{
133	}
134
135	static struct crypto_alg ccp_des3_defaults = {
136	.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER \|
137	CRYPTO_ALG_ASYNC \|
138	CRYPTO_ALG_KERN_DRIVER_ONLY \|
139	CRYPTO_ALG_NEED_FALLBACK,
140	.cra_blocksize = DES3_EDE_BLOCK_SIZE,
141	.cra_ctxsize = sizeof(struct ccp_ctx),
142	.cra_priority = CCP_CRA_PRIORITY,
143	.cra_type = &crypto_ablkcipher_type,
144	.cra_init = ccp_des3_cra_init,
145	.cra_exit = ccp_des3_cra_exit,
146	.cra_module = THIS_MODULE,
147	.cra_ablkcipher = {
148	.setkey = ccp_des3_setkey,
149	.encrypt = ccp_des3_encrypt,
150	.decrypt = ccp_des3_decrypt,
151	.min_keysize = DES3_EDE_KEY_SIZE,
152	.max_keysize = DES3_EDE_KEY_SIZE,
153	},
154	};
155
156	struct ccp_des3_def {
157	enum ccp_des3_mode mode;
158	unsigned int version;
159	const char *name;
160	const char *driver_name;
161	unsigned int blocksize;
162	unsigned int ivsize;
163	struct crypto_alg *alg_defaults;
164	};
165
166	static struct ccp_des3_def des3_algs[] = {
167	{
168	.mode = CCP_DES3_MODE_ECB,
169	.version = CCP_VERSION(5, 0),
170	.name = "ecb(des3_ede)",
171	.driver_name = "ecb-des3-ccp",
172	.blocksize = DES3_EDE_BLOCK_SIZE,
173	.ivsize = 0,
174	.alg_defaults = &ccp_des3_defaults,
175	},
176	{
177	.mode = CCP_DES3_MODE_CBC,
178	.version = CCP_VERSION(5, 0),
179	.name = "cbc(des3_ede)",
180	.driver_name = "cbc-des3-ccp",
181	.blocksize = DES3_EDE_BLOCK_SIZE,
182	.ivsize = DES3_EDE_BLOCK_SIZE,
183	.alg_defaults = &ccp_des3_defaults,
184	},
185	};
186
187	static int ccp_register_des3_alg(struct list_head *head,
188	const struct ccp_des3_def *def)
189	{
190	struct ccp_crypto_ablkcipher_alg *ccp_alg;
191	struct crypto_alg *alg;
192	int ret;
193
194	ccp_alg = kzalloc(sizeof(*ccp_alg), GFP_KERNEL);
195	if (!ccp_alg)
196	return -ENOMEM;
197
198	INIT_LIST_HEAD(&ccp_alg->entry);
199
200	ccp_alg->mode = def->mode;
201
202	/* Copy the defaults and override as necessary */
203	alg = &ccp_alg->alg;
204	alg = def->alg_defaults;
205	snprintf(alg->cra_name, CRYPTO_MAX_ALG_NAME, "%s", def->name);
206	snprintf(alg->cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s",
207	def->driver_name);
208	alg->cra_blocksize = def->blocksize;
209	alg->cra_ablkcipher.ivsize = def->ivsize;
210
211	ret = crypto_register_alg(alg);
212	if (ret) {
213	pr_err("%s ablkcipher algorithm registration error (%d)\n",
214	alg->cra_name, ret);
215	kfree(ccp_alg);
216	return ret;
217	}
218
219	list_add(&ccp_alg->entry, head);
220
221	return 0;
222	}
223
224	int ccp_register_des3_algs(struct list_head *head)
225	{
226	int i, ret;
227	unsigned int ccpversion = ccp_version();
228
229	for (i = 0; i < ARRAY_SIZE(des3_algs); i++) {
230	if (des3_algs[i].version > ccpversion)
231	continue;
232	ret = ccp_register_des3_alg(head, &des3_algs[i]);
233	if (ret)
234	return ret;
235	}
236
237	return 0;
238	}