forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
230 lines
5.7 KiB
230 lines
5.7 KiB
// 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 <[email protected]> |
|
*/ |
|
|
|
#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/internal/des.h> |
|
|
|
#include "ccp-crypto.h" |
|
|
|
static int ccp_des3_complete(struct crypto_async_request *async_req, int ret) |
|
{ |
|
struct skcipher_request *req = skcipher_request_cast(async_req); |
|
struct ccp_ctx *ctx = crypto_tfm_ctx(req->base.tfm); |
|
struct ccp_des3_req_ctx *rctx = skcipher_request_ctx(req); |
|
|
|
if (ret) |
|
return ret; |
|
|
|
if (ctx->u.des3.mode != CCP_DES3_MODE_ECB) |
|
memcpy(req->iv, rctx->iv, DES3_EDE_BLOCK_SIZE); |
|
|
|
return 0; |
|
} |
|
|
|
static int ccp_des3_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(tfm); |
|
int err; |
|
|
|
err = verify_skcipher_des3_key(tfm, key); |
|
if (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 skcipher_request *req, bool encrypt) |
|
{ |
|
struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); |
|
struct ccp_ctx *ctx = crypto_skcipher_ctx(tfm); |
|
struct ccp_des3_req_ctx *rctx = skcipher_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->cryptlen & (DES3_EDE_BLOCK_SIZE - 1))) |
|
return -EINVAL; |
|
|
|
if (ctx->u.des3.mode != CCP_DES3_MODE_ECB) { |
|
if (!req->iv) |
|
return -EINVAL; |
|
|
|
memcpy(rctx->iv, req->iv, 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->cryptlen; |
|
rctx->cmd.u.des3.dst = req->dst; |
|
|
|
ret = ccp_crypto_enqueue_request(&req->base, &rctx->cmd); |
|
|
|
return ret; |
|
} |
|
|
|
static int ccp_des3_encrypt(struct skcipher_request *req) |
|
{ |
|
return ccp_des3_crypt(req, true); |
|
} |
|
|
|
static int ccp_des3_decrypt(struct skcipher_request *req) |
|
{ |
|
return ccp_des3_crypt(req, false); |
|
} |
|
|
|
static int ccp_des3_init_tfm(struct crypto_skcipher *tfm) |
|
{ |
|
struct ccp_ctx *ctx = crypto_skcipher_ctx(tfm); |
|
|
|
ctx->complete = ccp_des3_complete; |
|
ctx->u.des3.key_len = 0; |
|
|
|
crypto_skcipher_set_reqsize(tfm, sizeof(struct ccp_des3_req_ctx)); |
|
|
|
return 0; |
|
} |
|
|
|
static const struct skcipher_alg ccp_des3_defaults = { |
|
.setkey = ccp_des3_setkey, |
|
.encrypt = ccp_des3_encrypt, |
|
.decrypt = ccp_des3_decrypt, |
|
.min_keysize = DES3_EDE_KEY_SIZE, |
|
.max_keysize = DES3_EDE_KEY_SIZE, |
|
.init = ccp_des3_init_tfm, |
|
|
|
.base.cra_flags = CRYPTO_ALG_ASYNC | |
|
CRYPTO_ALG_ALLOCATES_MEMORY | |
|
CRYPTO_ALG_KERN_DRIVER_ONLY | |
|
CRYPTO_ALG_NEED_FALLBACK, |
|
.base.cra_blocksize = DES3_EDE_BLOCK_SIZE, |
|
.base.cra_ctxsize = sizeof(struct ccp_ctx), |
|
.base.cra_priority = CCP_CRA_PRIORITY, |
|
.base.cra_module = THIS_MODULE, |
|
}; |
|
|
|
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(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_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; |
|
}
|
|
|