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

// SPDX-License-Identifier: GPL-2.0-only
/*
 * AMD Cryptographic Coprocessor (CCP) SHA crypto API support
 *
 * Copyright (C) 2013,2018 Advanced Micro Devices, Inc.
 *
 * Author: Tom Lendacky <thomas.lendacky@amd.com>
 * Author: Gary R Hook <gary.hook@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/hash.h>
#include <crypto/hmac.h>
#include <crypto/internal/hash.h>
#include <crypto/sha.h>
#include <crypto/scatterwalk.h>

#include "ccp-crypto.h"

static int ccp_sha_complete(struct crypto_async_request *async_req, int ret)
{
	struct ahash_request *req = ahash_request_cast(async_req);
	struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
	struct ccp_sha_req_ctx *rctx = ahash_request_ctx(req);
	unsigned int digest_size = crypto_ahash_digestsize(tfm);

	if (ret)
		goto e_free;

	if (rctx->hash_rem) {
		/* Save remaining data to buffer */
		unsigned int offset = rctx->nbytes - rctx->hash_rem;

		scatterwalk_map_and_copy(rctx->buf, rctx->src,
					 offset, rctx->hash_rem, 0);
		rctx->buf_count = rctx->hash_rem;
	} else {
		rctx->buf_count = 0;
	}

	/* Update result area if supplied */
	if (req->result && rctx->final)
		memcpy(req->result, rctx->ctx, digest_size);

e_free:
	sg_free_table(&rctx->data_sg);

	return ret;
}

static int ccp_do_sha_update(struct ahash_request *req, unsigned int nbytes,
			     unsigned int final)
{
	struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
	struct ccp_ctx *ctx = crypto_ahash_ctx(tfm);
	struct ccp_sha_req_ctx *rctx = ahash_request_ctx(req);
	struct scatterlist *sg;
	unsigned int block_size =
		crypto_tfm_alg_blocksize(crypto_ahash_tfm(tfm));
	unsigned int sg_count;
	gfp_t gfp;
	u64 len;
	int ret;

	len = (u64)rctx->buf_count + (u64)nbytes;

	if (!final && (len <= block_size)) {
		scatterwalk_map_and_copy(rctx->buf + rctx->buf_count, req->src,
					 0, nbytes, 0);
		rctx->buf_count += nbytes;

		return 0;
	}

	rctx->src = req->src;
	rctx->nbytes = nbytes;

	rctx->final = final;
	rctx->hash_rem = final ? 0 : len & (block_size - 1);
	rctx->hash_cnt = len - rctx->hash_rem;
	if (!final && !rctx->hash_rem) {
		/* CCP can't do zero length final, so keep some data around */
		rctx->hash_cnt -= block_size;
		rctx->hash_rem = block_size;
	}

	/* Initialize the context scatterlist */
	sg_init_one(&rctx->ctx_sg, rctx->ctx, sizeof(rctx->ctx));

	sg = NULL;
	if (rctx->buf_count && nbytes) {
		/* Build the data scatterlist table - allocate enough entries
		 * for both data pieces (buffer and input data)
		 */
		gfp = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ?
			GFP_KERNEL : GFP_ATOMIC;
		sg_count = sg_nents(req->src) + 1;
		ret = sg_alloc_table(&rctx->data_sg, sg_count, gfp);
		if (ret)
			return ret;

		sg_init_one(&rctx->buf_sg, rctx->buf, rctx->buf_count);
		sg = ccp_crypto_sg_table_add(&rctx->data_sg, &rctx->buf_sg);
		if (!sg) {
			ret = -EINVAL;
			goto e_free;
		}
		sg = ccp_crypto_sg_table_add(&rctx->data_sg, req->src);
		if (!sg) {
			ret = -EINVAL;
			goto e_free;
		}
		sg_mark_end(sg);

		sg = rctx->data_sg.sgl;
	} else if (rctx->buf_count) {
		sg_init_one(&rctx->buf_sg, rctx->buf, rctx->buf_count);

		sg = &rctx->buf_sg;
	} else if (nbytes) {
		sg = req->src;
	}

	rctx->msg_bits += (rctx->hash_cnt << 3);	/* Total in bits */

	memset(&rctx->cmd, 0, sizeof(rctx->cmd));
	INIT_LIST_HEAD(&rctx->cmd.entry);
	rctx->cmd.engine = CCP_ENGINE_SHA;
	rctx->cmd.u.sha.type = rctx->type;
	rctx->cmd.u.sha.ctx = &rctx->ctx_sg;

	switch (rctx->type) {
	case CCP_SHA_TYPE_1:
		rctx->cmd.u.sha.ctx_len = SHA1_DIGEST_SIZE;
		break;
	case CCP_SHA_TYPE_224:
		rctx->cmd.u.sha.ctx_len = SHA224_DIGEST_SIZE;
		break;
	case CCP_SHA_TYPE_256:
		rctx->cmd.u.sha.ctx_len = SHA256_DIGEST_SIZE;
		break;
	case CCP_SHA_TYPE_384:
		rctx->cmd.u.sha.ctx_len = SHA384_DIGEST_SIZE;
		break;
	case CCP_SHA_TYPE_512:
		rctx->cmd.u.sha.ctx_len = SHA512_DIGEST_SIZE;
		break;
	default:
		/* Should never get here */
		break;
	}

	rctx->cmd.u.sha.src = sg;
	rctx->cmd.u.sha.src_len = rctx->hash_cnt;
	rctx->cmd.u.sha.opad = ctx->u.sha.key_len ?
		&ctx->u.sha.opad_sg : NULL;
	rctx->cmd.u.sha.opad_len = ctx->u.sha.key_len ?
		ctx->u.sha.opad_count : 0;
	rctx->cmd.u.sha.first = rctx->first;
	rctx->cmd.u.sha.final = rctx->final;
	rctx->cmd.u.sha.msg_bits = rctx->msg_bits;

	rctx->first = 0;

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

	return ret;

e_free:
	sg_free_table(&rctx->data_sg);

	return ret;
}

static int ccp_sha_init(struct ahash_request *req)
{
	struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
	struct ccp_ctx *ctx = crypto_ahash_ctx(tfm);
	struct ccp_sha_req_ctx *rctx = ahash_request_ctx(req);
	struct ccp_crypto_ahash_alg *alg =
		ccp_crypto_ahash_alg(crypto_ahash_tfm(tfm));
	unsigned int block_size =
		crypto_tfm_alg_blocksize(crypto_ahash_tfm(tfm));

	memset(rctx, 0, sizeof(*rctx));

	rctx->type = alg->type;
	rctx->first = 1;

	if (ctx->u.sha.key_len) {
		/* Buffer the HMAC key for first update */
		memcpy(rctx->buf, ctx->u.sha.ipad, block_size);
		rctx->buf_count = block_size;
	}

	return 0;
}

static int ccp_sha_update(struct ahash_request *req)
{
	return ccp_do_sha_update(req, req->nbytes, 0);
}

static int ccp_sha_final(struct ahash_request *req)
{
	return ccp_do_sha_update(req, 0, 1);
}

static int ccp_sha_finup(struct ahash_request *req)
{
	return ccp_do_sha_update(req, req->nbytes, 1);
}

static int ccp_sha_digest(struct ahash_request *req)
{
	int ret;

	ret = ccp_sha_init(req);
	if (ret)
		return ret;

	return ccp_sha_finup(req);
}

static int ccp_sha_export(struct ahash_request *req, void *out)
{
	struct ccp_sha_req_ctx *rctx = ahash_request_ctx(req);
	struct ccp_sha_exp_ctx state;

	/* Don't let anything leak to 'out' */
	memset(&state, 0, sizeof(state));

	state.type = rctx->type;
	state.msg_bits = rctx->msg_bits;
	state.first = rctx->first;
	memcpy(state.ctx, rctx->ctx, sizeof(state.ctx));
	state.buf_count = rctx->buf_count;
	memcpy(state.buf, rctx->buf, sizeof(state.buf));

	/* 'out' may not be aligned so memcpy from local variable */
	memcpy(out, &state, sizeof(state));

	return 0;
}

static int ccp_sha_import(struct ahash_request *req, const void *in)
{
	struct ccp_sha_req_ctx *rctx = ahash_request_ctx(req);
	struct ccp_sha_exp_ctx state;

	/* 'in' may not be aligned so memcpy to local variable */
	memcpy(&state, in, sizeof(state));

	memset(rctx, 0, sizeof(*rctx));
	rctx->type = state.type;
	rctx->msg_bits = state.msg_bits;
	rctx->first = state.first;
	memcpy(rctx->ctx, state.ctx, sizeof(rctx->ctx));
	rctx->buf_count = state.buf_count;
	memcpy(rctx->buf, state.buf, sizeof(rctx->buf));

	return 0;
}

static int ccp_sha_setkey(struct crypto_ahash *tfm, const u8 *key,
			  unsigned int key_len)
{
	struct ccp_ctx *ctx = crypto_tfm_ctx(crypto_ahash_tfm(tfm));
	struct crypto_shash *shash = ctx->u.sha.hmac_tfm;

	SHASH_DESC_ON_STACK(sdesc, shash);

	unsigned int block_size = crypto_shash_blocksize(shash);
	unsigned int digest_size = crypto_shash_digestsize(shash);
	int i, ret;

	/* Set to zero until complete */
	ctx->u.sha.key_len = 0;

	/* Clear key area to provide zero padding for keys smaller
	 * than the block size
	 */
	memset(ctx->u.sha.key, 0, sizeof(ctx->u.sha.key));

	if (key_len > block_size) {
		/* Must hash the input key */
		sdesc->tfm = shash;

		ret = crypto_shash_digest(sdesc, key, key_len,
					  ctx->u.sha.key);
		if (ret) {
			crypto_ahash_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
			return -EINVAL;
		}

		key_len = digest_size;
	} else {
		memcpy(ctx->u.sha.key, key, key_len);
	}

	for (i = 0; i < block_size; i++) {
		ctx->u.sha.ipad[i] = ctx->u.sha.key[i] ^ HMAC_IPAD_VALUE;
		ctx->u.sha.opad[i] = ctx->u.sha.key[i] ^ HMAC_OPAD_VALUE;
	}

	sg_init_one(&ctx->u.sha.opad_sg, ctx->u.sha.opad, block_size);
	ctx->u.sha.opad_count = block_size;

	ctx->u.sha.key_len = key_len;

	return 0;
}

static int ccp_sha_cra_init(struct crypto_tfm *tfm)
{
	struct ccp_ctx *ctx = crypto_tfm_ctx(tfm);
	struct crypto_ahash *ahash = __crypto_ahash_cast(tfm);

	ctx->complete = ccp_sha_complete;
	ctx->u.sha.key_len = 0;

	crypto_ahash_set_reqsize(ahash, sizeof(struct ccp_sha_req_ctx));

	return 0;
}

static void ccp_sha_cra_exit(struct crypto_tfm *tfm)
{
}

static int ccp_hmac_sha_cra_init(struct crypto_tfm *tfm)
{
	struct ccp_ctx *ctx = crypto_tfm_ctx(tfm);
	struct ccp_crypto_ahash_alg *alg = ccp_crypto_ahash_alg(tfm);
	struct crypto_shash *hmac_tfm;

	hmac_tfm = crypto_alloc_shash(alg->child_alg, 0, 0);
	if (IS_ERR(hmac_tfm)) {
		pr_warn("could not load driver %s need for HMAC support\n",
			alg->child_alg);
		return PTR_ERR(hmac_tfm);
	}

	ctx->u.sha.hmac_tfm = hmac_tfm;

	return ccp_sha_cra_init(tfm);
}

static void ccp_hmac_sha_cra_exit(struct crypto_tfm *tfm)
{
	struct ccp_ctx *ctx = crypto_tfm_ctx(tfm);

	if (ctx->u.sha.hmac_tfm)
		crypto_free_shash(ctx->u.sha.hmac_tfm);

	ccp_sha_cra_exit(tfm);
}

struct ccp_sha_def {
	unsigned int version;
	const char *name;
	const char *drv_name;
	enum ccp_sha_type type;
	u32 digest_size;
	u32 block_size;
};

static struct ccp_sha_def sha_algs[] = {
	{
		.version	= CCP_VERSION(3, 0),
		.name		= "sha1",
		.drv_name	= "sha1-ccp",
		.type		= CCP_SHA_TYPE_1,
		.digest_size	= SHA1_DIGEST_SIZE,
		.block_size	= SHA1_BLOCK_SIZE,
	},
	{
		.version	= CCP_VERSION(3, 0),
		.name		= "sha224",
		.drv_name	= "sha224-ccp",
		.type		= CCP_SHA_TYPE_224,
		.digest_size	= SHA224_DIGEST_SIZE,
		.block_size	= SHA224_BLOCK_SIZE,
	},
	{
		.version	= CCP_VERSION(3, 0),
		.name		= "sha256",
		.drv_name	= "sha256-ccp",
		.type		= CCP_SHA_TYPE_256,
		.digest_size	= SHA256_DIGEST_SIZE,
		.block_size	= SHA256_BLOCK_SIZE,
	},
	{
		.version	= CCP_VERSION(5, 0),
		.name		= "sha384",
		.drv_name	= "sha384-ccp",
		.type		= CCP_SHA_TYPE_384,
		.digest_size	= SHA384_DIGEST_SIZE,
		.block_size	= SHA384_BLOCK_SIZE,
	},
	{
		.version	= CCP_VERSION(5, 0),
		.name		= "sha512",
		.drv_name	= "sha512-ccp",
		.type		= CCP_SHA_TYPE_512,
		.digest_size	= SHA512_DIGEST_SIZE,
		.block_size	= SHA512_BLOCK_SIZE,
	},
};

static int ccp_register_hmac_alg(struct list_head *head,
				 const struct ccp_sha_def *def,
				 const struct ccp_crypto_ahash_alg *base_alg)
{
	struct ccp_crypto_ahash_alg *ccp_alg;
	struct ahash_alg *alg;
	struct hash_alg_common *halg;
	struct crypto_alg *base;
	int ret;

	ccp_alg = kzalloc(sizeof(*ccp_alg), GFP_KERNEL);
	if (!ccp_alg)
		return -ENOMEM;

	/* Copy the base algorithm and only change what's necessary */
	*ccp_alg = *base_alg;
	INIT_LIST_HEAD(&ccp_alg->entry);

	strncpy(ccp_alg->child_alg, def->name, CRYPTO_MAX_ALG_NAME);

	alg = &ccp_alg->alg;
	alg->setkey = ccp_sha_setkey;

	halg = &alg->halg;

	base = &halg->base;
	snprintf(base->cra_name, CRYPTO_MAX_ALG_NAME, "hmac(%s)", def->name);
	snprintf(base->cra_driver_name, CRYPTO_MAX_ALG_NAME, "hmac-%s",
		 def->drv_name);
	base->cra_init = ccp_hmac_sha_cra_init;
	base->cra_exit = ccp_hmac_sha_cra_exit;

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

	list_add(&ccp_alg->entry, head);

	return ret;
}

static int ccp_register_sha_alg(struct list_head *head,
				const struct ccp_sha_def *def)
{
	struct ccp_crypto_ahash_alg *ccp_alg;
	struct ahash_alg *alg;
	struct hash_alg_common *halg;
	struct crypto_alg *base;
	int ret;

	ccp_alg = kzalloc(sizeof(*ccp_alg), GFP_KERNEL);
	if (!ccp_alg)
		return -ENOMEM;

	INIT_LIST_HEAD(&ccp_alg->entry);

	ccp_alg->type = def->type;

	alg = &ccp_alg->alg;
	alg->init = ccp_sha_init;
	alg->update = ccp_sha_update;
	alg->final = ccp_sha_final;
	alg->finup = ccp_sha_finup;
	alg->digest = ccp_sha_digest;
	alg->export = ccp_sha_export;
	alg->import = ccp_sha_import;

	halg = &alg->halg;
	halg->digestsize = def->digest_size;
	halg->statesize = sizeof(struct ccp_sha_exp_ctx);

	base = &halg->base;
	snprintf(base->cra_name, CRYPTO_MAX_ALG_NAME, "%s", def->name);
	snprintf(base->cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s",
		 def->drv_name);
	base->cra_flags = CRYPTO_ALG_ASYNC |
			  CRYPTO_ALG_KERN_DRIVER_ONLY |
			  CRYPTO_ALG_NEED_FALLBACK;
	base->cra_blocksize = def->block_size;
	base->cra_ctxsize = sizeof(struct ccp_ctx);
	base->cra_priority = CCP_CRA_PRIORITY;
	base->cra_init = ccp_sha_cra_init;
	base->cra_exit = ccp_sha_cra_exit;
	base->cra_module = THIS_MODULE;

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

	list_add(&ccp_alg->entry, head);

	ret = ccp_register_hmac_alg(head, def, ccp_alg);

	return ret;
}

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

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

	return 0;
}
Commit	Line	Data
d2912cb1	1	// SPDX-License-Identifier: GPL-2.0-only
0ab0a1d5 TL	2	/*
	3	* AMD Cryptographic Coprocessor (CCP) SHA crypto API support
	4	*
fa5cd1c7	5	* Copyright (C) 2013,2018 Advanced Micro Devices, Inc.
0ab0a1d5 TL	6	*
0ab0a1d5 TL	7	* Author: Tom Lendacky <thomas.lendacky@amd.com>
4b394a23	8	* Author: Gary R Hook <gary.hook@amd.com>
0ab0a1d5 TL	9	*/
	10
	11	#include <linux/module.h>
	12	#include <linux/sched.h>
	13	#include <linux/delay.h>
	14	#include <linux/scatterlist.h>
	15	#include <linux/crypto.h>
	16	#include <crypto/algapi.h>
	17	#include <crypto/hash.h>
6507c57b	18	#include <crypto/hmac.h>
0ab0a1d5 TL	19	#include <crypto/internal/hash.h>
	20	#include <crypto/sha.h>
	21	#include <crypto/scatterwalk.h>
	22
	23	#include "ccp-crypto.h"
	24
0ab0a1d5 TL	25	static int ccp_sha_complete(struct crypto_async_request *async_req, int ret)
	26	{
	27	struct ahash_request *req = ahash_request_cast(async_req);
	28	struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
0ab0a1d5 TL	29	struct ccp_sha_req_ctx *rctx = ahash_request_ctx(req);
	30	unsigned int digest_size = crypto_ahash_digestsize(tfm);
	31
	32	if (ret)
	33	goto e_free;
	34
	35	if (rctx->hash_rem) {
	36	/* Save remaining data to buffer */
81a59f00	37	unsigned int offset = rctx->nbytes - rctx->hash_rem;
8db88467	38
81a59f00 TL	39	scatterwalk_map_and_copy(rctx->buf, rctx->src,
81a59f00 TL	40	offset, rctx->hash_rem, 0);
0ab0a1d5	41	rctx->buf_count = rctx->hash_rem;
8db88467	42	} else {
0ab0a1d5	43	rctx->buf_count = 0;
8db88467	44	}
0ab0a1d5	45
393897c5	46	/* Update result area if supplied */
0ee991be	47	if (req->result && rctx->final)
393897c5	48	memcpy(req->result, rctx->ctx, digest_size);
0ab0a1d5	49
0ab0a1d5 TL	50	e_free:
	51	sg_free_table(&rctx->data_sg);
	52
	53	return ret;
	54	}
	55
	56	static int ccp_do_sha_update(struct ahash_request *req, unsigned int nbytes,
	57	unsigned int final)
	58	{
	59	struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
c11baa02	60	struct ccp_ctx *ctx = crypto_ahash_ctx(tfm);
0ab0a1d5 TL	61	struct ccp_sha_req_ctx *rctx = ahash_request_ctx(req);
	62	struct scatterlist *sg;
	63	unsigned int block_size =
	64	crypto_tfm_alg_blocksize(crypto_ahash_tfm(tfm));
81a59f00	65	unsigned int sg_count;
5258de8a	66	gfp_t gfp;
81a59f00	67	u64 len;
0ab0a1d5 TL	68	int ret;
0ab0a1d5 TL	69
81a59f00 TL	70	len = (u64)rctx->buf_count + (u64)nbytes;
	71
	72	if (!final && (len <= block_size)) {
0ab0a1d5 TL	73	scatterwalk_map_and_copy(rctx->buf + rctx->buf_count, req->src,
	74	0, nbytes, 0);
	75	rctx->buf_count += nbytes;
	76
	77	return 0;
	78	}
	79
81a59f00 TL	80	rctx->src = req->src;
81a59f00 TL	81	rctx->nbytes = nbytes;
0ab0a1d5 TL	82
0ab0a1d5 TL	83	rctx->final = final;
81a59f00 TL	84	rctx->hash_rem = final ? 0 : len & (block_size - 1);
	85	rctx->hash_cnt = len - rctx->hash_rem;
	86	if (!final && !rctx->hash_rem) {
0ab0a1d5 TL	87	/* CCP can't do zero length final, so keep some data around */
	88	rctx->hash_cnt -= block_size;
	89	rctx->hash_rem = block_size;
	90	}
	91
	92	/* Initialize the context scatterlist */
	93	sg_init_one(&rctx->ctx_sg, rctx->ctx, sizeof(rctx->ctx));
	94
0ab0a1d5	95	sg = NULL;
77dc4a51 TL	96	if (rctx->buf_count && nbytes) {
	97	/* Build the data scatterlist table - allocate enough entries
	98	* for both data pieces (buffer and input data)
	99	*/
	100	gfp = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ?
	101	GFP_KERNEL : GFP_ATOMIC;
	102	sg_count = sg_nents(req->src) + 1;
	103	ret = sg_alloc_table(&rctx->data_sg, sg_count, gfp);
	104	if (ret)
	105	return ret;
0ab0a1d5	106
0ab0a1d5 TL	107	sg_init_one(&rctx->buf_sg, rctx->buf, rctx->buf_count);
0ab0a1d5 TL	108	sg = ccp_crypto_sg_table_add(&rctx->data_sg, &rctx->buf_sg);
355eba5d TL	109	if (!sg) {
	110	ret = -EINVAL;
	111	goto e_free;
	112	}
0ab0a1d5	113	sg = ccp_crypto_sg_table_add(&rctx->data_sg, req->src);
355eba5d TL	114	if (!sg) {
	115	ret = -EINVAL;
	116	goto e_free;
	117	}
0ab0a1d5 TL	118	sg_mark_end(sg);
0ab0a1d5 TL	119
77dc4a51 TL	120	sg = rctx->data_sg.sgl;
	121	} else if (rctx->buf_count) {
	122	sg_init_one(&rctx->buf_sg, rctx->buf, rctx->buf_count);
	123
	124	sg = &rctx->buf_sg;
	125	} else if (nbytes) {
	126	sg = req->src;
	127	}
	128
0ab0a1d5 TL	129	rctx->msg_bits += (rctx->hash_cnt << 3); /* Total in bits */
	130
	131	memset(&rctx->cmd, 0, sizeof(rctx->cmd));
	132	INIT_LIST_HEAD(&rctx->cmd.entry);
	133	rctx->cmd.engine = CCP_ENGINE_SHA;
	134	rctx->cmd.u.sha.type = rctx->type;
	135	rctx->cmd.u.sha.ctx = &rctx->ctx_sg;
4b394a23 GH	136
	137	switch (rctx->type) {
	138	case CCP_SHA_TYPE_1:
	139	rctx->cmd.u.sha.ctx_len = SHA1_DIGEST_SIZE;
	140	break;
	141	case CCP_SHA_TYPE_224:
	142	rctx->cmd.u.sha.ctx_len = SHA224_DIGEST_SIZE;
	143	break;
	144	case CCP_SHA_TYPE_256:
	145	rctx->cmd.u.sha.ctx_len = SHA256_DIGEST_SIZE;
	146	break;
ccebcf3f GH	147	case CCP_SHA_TYPE_384:
	148	rctx->cmd.u.sha.ctx_len = SHA384_DIGEST_SIZE;
	149	break;
	150	case CCP_SHA_TYPE_512:
	151	rctx->cmd.u.sha.ctx_len = SHA512_DIGEST_SIZE;
	152	break;
4b394a23 GH	153	default:
	154	/* Should never get here */
	155	break;
	156	}
	157
77dc4a51	158	rctx->cmd.u.sha.src = sg;
0ab0a1d5	159	rctx->cmd.u.sha.src_len = rctx->hash_cnt;
c11baa02 TL	160	rctx->cmd.u.sha.opad = ctx->u.sha.key_len ?
	161	&ctx->u.sha.opad_sg : NULL;
	162	rctx->cmd.u.sha.opad_len = ctx->u.sha.key_len ?
	163	ctx->u.sha.opad_count : 0;
	164	rctx->cmd.u.sha.first = rctx->first;
0ab0a1d5 TL	165	rctx->cmd.u.sha.final = rctx->final;
	166	rctx->cmd.u.sha.msg_bits = rctx->msg_bits;
	167
	168	rctx->first = 0;
	169
	170	ret = ccp_crypto_enqueue_request(&req->base, &rctx->cmd);
	171
355eba5d TL	172	return ret;
	173
	174	e_free:
	175	sg_free_table(&rctx->data_sg);
	176
0ab0a1d5 TL	177	return ret;
	178	}
	179
	180	static int ccp_sha_init(struct ahash_request *req)
	181	{
	182	struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
77dc4a51	183	struct ccp_ctx *ctx = crypto_ahash_ctx(tfm);
0ab0a1d5 TL	184	struct ccp_sha_req_ctx *rctx = ahash_request_ctx(req);
	185	struct ccp_crypto_ahash_alg *alg =
	186	ccp_crypto_ahash_alg(crypto_ahash_tfm(tfm));
77dc4a51 TL	187	unsigned int block_size =
77dc4a51 TL	188	crypto_tfm_alg_blocksize(crypto_ahash_tfm(tfm));
0ab0a1d5 TL	189
	190	memset(rctx, 0, sizeof(*rctx));
	191
0ab0a1d5 TL	192	rctx->type = alg->type;
	193	rctx->first = 1;
	194
77dc4a51 TL	195	if (ctx->u.sha.key_len) {
	196	/* Buffer the HMAC key for first update */
	197	memcpy(rctx->buf, ctx->u.sha.ipad, block_size);
	198	rctx->buf_count = block_size;
	199	}
	200
0ab0a1d5 TL	201	return 0;
	202	}
	203
	204	static int ccp_sha_update(struct ahash_request *req)
	205	{
	206	return ccp_do_sha_update(req, req->nbytes, 0);
	207	}
	208
	209	static int ccp_sha_final(struct ahash_request *req)
	210	{
	211	return ccp_do_sha_update(req, 0, 1);
	212	}
	213
	214	static int ccp_sha_finup(struct ahash_request *req)
	215	{
	216	return ccp_do_sha_update(req, req->nbytes, 1);
	217	}
	218
	219	static int ccp_sha_digest(struct ahash_request *req)
	220	{
82d1585b	221	int ret;
0ab0a1d5	222
82d1585b TL	223	ret = ccp_sha_init(req);
	224	if (ret)
	225	return ret;
	226
	227	return ccp_sha_finup(req);
0ab0a1d5 TL	228	}
0ab0a1d5 TL	229
952bce97 TL	230	static int ccp_sha_export(struct ahash_request req, void out)
	231	{
	232	struct ccp_sha_req_ctx *rctx = ahash_request_ctx(req);
b31dde2a	233	struct ccp_sha_exp_ctx state;
952bce97	234
f709b45e TL	235	/* Don't let anything leak to 'out' */
	236	memset(&state, 0, sizeof(state));
	237
b31dde2a TL	238	state.type = rctx->type;
	239	state.msg_bits = rctx->msg_bits;
	240	state.first = rctx->first;
	241	memcpy(state.ctx, rctx->ctx, sizeof(state.ctx));
	242	state.buf_count = rctx->buf_count;
	243	memcpy(state.buf, rctx->buf, sizeof(state.buf));
	244
	245	/* 'out' may not be aligned so memcpy from local variable */
	246	memcpy(out, &state, sizeof(state));
952bce97 TL	247
	248	return 0;
	249	}
	250
	251	static int ccp_sha_import(struct ahash_request req, const void in)
	252	{
	253	struct ccp_sha_req_ctx *rctx = ahash_request_ctx(req);
b31dde2a TL	254	struct ccp_sha_exp_ctx state;
	255
	256	/* 'in' may not be aligned so memcpy to local variable */
	257	memcpy(&state, in, sizeof(state));
	258
ce0ae266	259	memset(rctx, 0, sizeof(*rctx));
b31dde2a TL	260	rctx->type = state.type;
	261	rctx->msg_bits = state.msg_bits;
	262	rctx->first = state.first;
	263	memcpy(rctx->ctx, state.ctx, sizeof(rctx->ctx));
	264	rctx->buf_count = state.buf_count;
	265	memcpy(rctx->buf, state.buf, sizeof(rctx->buf));
952bce97 TL	266
	267	return 0;
	268	}
	269
0ab0a1d5 TL	270	static int ccp_sha_setkey(struct crypto_ahash tfm, const u8 key,
	271	unsigned int key_len)
	272	{
	273	struct ccp_ctx *ctx = crypto_tfm_ctx(crypto_ahash_tfm(tfm));
c11baa02	274	struct crypto_shash *shash = ctx->u.sha.hmac_tfm;
61ded524 JSM	275
	276	SHASH_DESC_ON_STACK(sdesc, shash);
	277
c11baa02 TL	278	unsigned int block_size = crypto_shash_blocksize(shash);
c11baa02 TL	279	unsigned int digest_size = crypto_shash_digestsize(shash);
0ab0a1d5 TL	280	int i, ret;
	281
	282	/* Set to zero until complete */
	283	ctx->u.sha.key_len = 0;
	284
	285	/* Clear key area to provide zero padding for keys smaller
	286	* than the block size
	287	*/
	288	memset(ctx->u.sha.key, 0, sizeof(ctx->u.sha.key));
	289
	290	if (key_len > block_size) {
	291	/* Must hash the input key */
61ded524	292	sdesc->tfm = shash;
c11baa02	293
61ded524	294	ret = crypto_shash_digest(sdesc, key, key_len,
c11baa02	295	ctx->u.sha.key);
0ab0a1d5 TL	296	if (ret) {
	297	crypto_ahash_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
	298	return -EINVAL;
	299	}
	300
	301	key_len = digest_size;
8db88467	302	} else {
0ab0a1d5	303	memcpy(ctx->u.sha.key, key, key_len);
8db88467	304	}
0ab0a1d5 TL	305
0ab0a1d5 TL	306	for (i = 0; i < block_size; i++) {
6507c57b CL	307	ctx->u.sha.ipad[i] = ctx->u.sha.key[i] ^ HMAC_IPAD_VALUE;
6507c57b CL	308	ctx->u.sha.opad[i] = ctx->u.sha.key[i] ^ HMAC_OPAD_VALUE;
0ab0a1d5 TL	309	}
0ab0a1d5 TL	310
c11baa02 TL	311	sg_init_one(&ctx->u.sha.opad_sg, ctx->u.sha.opad, block_size);
	312	ctx->u.sha.opad_count = block_size;
	313
0ab0a1d5 TL	314	ctx->u.sha.key_len = key_len;
	315
	316	return 0;
	317	}
	318
	319	static int ccp_sha_cra_init(struct crypto_tfm *tfm)
	320	{
	321	struct ccp_ctx *ctx = crypto_tfm_ctx(tfm);
	322	struct crypto_ahash *ahash = __crypto_ahash_cast(tfm);
	323
	324	ctx->complete = ccp_sha_complete;
	325	ctx->u.sha.key_len = 0;
	326
	327	crypto_ahash_set_reqsize(ahash, sizeof(struct ccp_sha_req_ctx));
	328
	329	return 0;
	330	}
	331
	332	static void ccp_sha_cra_exit(struct crypto_tfm *tfm)
	333	{
	334	}
	335
	336	static int ccp_hmac_sha_cra_init(struct crypto_tfm *tfm)
	337	{
	338	struct ccp_ctx *ctx = crypto_tfm_ctx(tfm);
	339	struct ccp_crypto_ahash_alg *alg = ccp_crypto_ahash_alg(tfm);
c11baa02	340	struct crypto_shash *hmac_tfm;
0ab0a1d5	341
c11baa02	342	hmac_tfm = crypto_alloc_shash(alg->child_alg, 0, 0);
0ab0a1d5 TL	343	if (IS_ERR(hmac_tfm)) {
	344	pr_warn("could not load driver %s need for HMAC support\n",
	345	alg->child_alg);
	346	return PTR_ERR(hmac_tfm);
	347	}
	348
	349	ctx->u.sha.hmac_tfm = hmac_tfm;
	350
	351	return ccp_sha_cra_init(tfm);
	352	}
	353
	354	static void ccp_hmac_sha_cra_exit(struct crypto_tfm *tfm)
	355	{
	356	struct ccp_ctx *ctx = crypto_tfm_ctx(tfm);
	357
	358	if (ctx->u.sha.hmac_tfm)
c11baa02	359	crypto_free_shash(ctx->u.sha.hmac_tfm);
0ab0a1d5 TL	360
	361	ccp_sha_cra_exit(tfm);
	362	}
	363
0ab0a1d5	364	struct ccp_sha_def {
c7019c4d	365	unsigned int version;
0ab0a1d5 TL	366	const char *name;
0ab0a1d5 TL	367	const char *drv_name;
0ab0a1d5 TL	368	enum ccp_sha_type type;
	369	u32 digest_size;
	370	u32 block_size;
	371	};
	372
	373	static struct ccp_sha_def sha_algs[] = {
	374	{
c7019c4d	375	.version = CCP_VERSION(3, 0),
0ab0a1d5 TL	376	.name = "sha1",
0ab0a1d5 TL	377	.drv_name = "sha1-ccp",
0ab0a1d5 TL	378	.type = CCP_SHA_TYPE_1,
	379	.digest_size = SHA1_DIGEST_SIZE,
	380	.block_size = SHA1_BLOCK_SIZE,
	381	},
	382	{
c7019c4d	383	.version = CCP_VERSION(3, 0),
0ab0a1d5 TL	384	.name = "sha224",
0ab0a1d5 TL	385	.drv_name = "sha224-ccp",
0ab0a1d5 TL	386	.type = CCP_SHA_TYPE_224,
	387	.digest_size = SHA224_DIGEST_SIZE,
	388	.block_size = SHA224_BLOCK_SIZE,
	389	},
	390	{
c7019c4d	391	.version = CCP_VERSION(3, 0),
0ab0a1d5 TL	392	.name = "sha256",
0ab0a1d5 TL	393	.drv_name = "sha256-ccp",
0ab0a1d5 TL	394	.type = CCP_SHA_TYPE_256,
	395	.digest_size = SHA256_DIGEST_SIZE,
	396	.block_size = SHA256_BLOCK_SIZE,
	397	},
ccebcf3f GH	398	{
	399	.version = CCP_VERSION(5, 0),
	400	.name = "sha384",
	401	.drv_name = "sha384-ccp",
	402	.type = CCP_SHA_TYPE_384,
	403	.digest_size = SHA384_DIGEST_SIZE,
	404	.block_size = SHA384_BLOCK_SIZE,
	405	},
	406	{
	407	.version = CCP_VERSION(5, 0),
	408	.name = "sha512",
	409	.drv_name = "sha512-ccp",
	410	.type = CCP_SHA_TYPE_512,
	411	.digest_size = SHA512_DIGEST_SIZE,
	412	.block_size = SHA512_BLOCK_SIZE,
	413	},
0ab0a1d5 TL	414	};
	415
	416	static int ccp_register_hmac_alg(struct list_head *head,
	417	const struct ccp_sha_def *def,
	418	const struct ccp_crypto_ahash_alg *base_alg)
	419	{
	420	struct ccp_crypto_ahash_alg *ccp_alg;
	421	struct ahash_alg *alg;
	422	struct hash_alg_common *halg;
	423	struct crypto_alg *base;
	424	int ret;
	425
	426	ccp_alg = kzalloc(sizeof(*ccp_alg), GFP_KERNEL);
	427	if (!ccp_alg)
	428	return -ENOMEM;
	429
	430	/* Copy the base algorithm and only change what's necessary */
d1dd206c	431	ccp_alg = base_alg;
0ab0a1d5 TL	432	INIT_LIST_HEAD(&ccp_alg->entry);
	433
	434	strncpy(ccp_alg->child_alg, def->name, CRYPTO_MAX_ALG_NAME);
	435
	436	alg = &ccp_alg->alg;
	437	alg->setkey = ccp_sha_setkey;
	438
	439	halg = &alg->halg;
	440
	441	base = &halg->base;
	442	snprintf(base->cra_name, CRYPTO_MAX_ALG_NAME, "hmac(%s)", def->name);
	443	snprintf(base->cra_driver_name, CRYPTO_MAX_ALG_NAME, "hmac-%s",
	444	def->drv_name);
	445	base->cra_init = ccp_hmac_sha_cra_init;
	446	base->cra_exit = ccp_hmac_sha_cra_exit;
	447
	448	ret = crypto_register_ahash(alg);
	449	if (ret) {
	450	pr_err("%s ahash algorithm registration error (%d)\n",
8db88467	451	base->cra_name, ret);
0ab0a1d5 TL	452	kfree(ccp_alg);
	453	return ret;
	454	}
	455
	456	list_add(&ccp_alg->entry, head);
	457
	458	return ret;
	459	}
	460
	461	static int ccp_register_sha_alg(struct list_head *head,
	462	const struct ccp_sha_def *def)
	463	{
	464	struct ccp_crypto_ahash_alg *ccp_alg;
	465	struct ahash_alg *alg;
	466	struct hash_alg_common *halg;
	467	struct crypto_alg *base;
	468	int ret;
	469
	470	ccp_alg = kzalloc(sizeof(*ccp_alg), GFP_KERNEL);
	471	if (!ccp_alg)
	472	return -ENOMEM;
	473
	474	INIT_LIST_HEAD(&ccp_alg->entry);
	475
0ab0a1d5 TL	476	ccp_alg->type = def->type;
	477
	478	alg = &ccp_alg->alg;
	479	alg->init = ccp_sha_init;
	480	alg->update = ccp_sha_update;
	481	alg->final = ccp_sha_final;
	482	alg->finup = ccp_sha_finup;
	483	alg->digest = ccp_sha_digest;
952bce97 TL	484	alg->export = ccp_sha_export;
952bce97 TL	485	alg->import = ccp_sha_import;
0ab0a1d5 TL	486
	487	halg = &alg->halg;
	488	halg->digestsize = def->digest_size;
d1662165	489	halg->statesize = sizeof(struct ccp_sha_exp_ctx);
0ab0a1d5 TL	490
	491	base = &halg->base;
	492	snprintf(base->cra_name, CRYPTO_MAX_ALG_NAME, "%s", def->name);
	493	snprintf(base->cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s",
	494	def->drv_name);
6a38f622	495	base->cra_flags = CRYPTO_ALG_ASYNC \|
0ab0a1d5 TL	496	CRYPTO_ALG_KERN_DRIVER_ONLY \|
	497	CRYPTO_ALG_NEED_FALLBACK;
	498	base->cra_blocksize = def->block_size;
	499	base->cra_ctxsize = sizeof(struct ccp_ctx);
	500	base->cra_priority = CCP_CRA_PRIORITY;
0ab0a1d5 TL	501	base->cra_init = ccp_sha_cra_init;
	502	base->cra_exit = ccp_sha_cra_exit;
	503	base->cra_module = THIS_MODULE;
	504
	505	ret = crypto_register_ahash(alg);
	506	if (ret) {
	507	pr_err("%s ahash algorithm registration error (%d)\n",
8db88467	508	base->cra_name, ret);
0ab0a1d5 TL	509	kfree(ccp_alg);
	510	return ret;
	511	}
	512
	513	list_add(&ccp_alg->entry, head);
	514
	515	ret = ccp_register_hmac_alg(head, def, ccp_alg);
	516
	517	return ret;
	518	}
	519
	520	int ccp_register_sha_algs(struct list_head *head)
	521	{
	522	int i, ret;
c7019c4d	523	unsigned int ccpversion = ccp_version();
0ab0a1d5 TL	524
0ab0a1d5 TL	525	for (i = 0; i < ARRAY_SIZE(sha_algs); i++) {
c7019c4d GH	526	if (sha_algs[i].version > ccpversion)
c7019c4d GH	527	continue;
0ab0a1d5 TL	528	ret = ccp_register_sha_alg(head, &sha_algs[i]);
	529	if (ret)
	530	return ret;
	531	}
	532
	533	return 0;
	534	}