Commit 990672d4 authored by Gary R Hook's avatar Gary R Hook Committed by Herbert Xu
Browse files

crypto: ccp - Enable 3DES function on v5 CCPs



Wire up support for Triple DES in ECB mode.
Signed-off-by: default avatarGary R Hook <gary.hook@amd.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent ccebcf3f
......@@ -12,4 +12,5 @@ ccp-crypto-objs := ccp-crypto-main.o \
ccp-crypto-aes.o \
ccp-crypto-aes-cmac.o \
ccp-crypto-aes-xts.o \
ccp-crypto-des3.o \
ccp-crypto-sha.o
/*
* AMD Cryptographic Coprocessor (CCP) DES3 crypto API support
*
* Copyright (C) 2016 Advanced Micro Devices, Inc.
*
* Author: Gary R Hook <ghook@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/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;
/* From des_generic.c:
*
* RFC2451:
* If the first two or last two independent 64-bit keys are
* equal (k1 == k2 or k2 == k3), then the DES3 operation is simply the
* same as DES. Implementers MUST reject keys that exhibit this
* property.
*/
const u32 *K = (const u32 *)key;
if (unlikely(!((K[0] ^ K[2]) | (K[1] ^ K[3])) ||
!((K[2] ^ K[4]) | (K[3] ^ K[5]))) &&
(*flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
*flags |= CRYPTO_TFM_RES_WEAK_KEY;
return -EINVAL;
}
/* 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;
}
......@@ -33,6 +33,10 @@ static unsigned int sha_disable;
module_param(sha_disable, uint, 0444);
MODULE_PARM_DESC(sha_disable, "Disable use of SHA - any non-zero value");
static unsigned int des3_disable;
module_param(des3_disable, uint, 0444);
MODULE_PARM_DESC(des3_disable, "Disable use of 3DES - any non-zero value");
/* List heads for the supported algorithms */
static LIST_HEAD(hash_algs);
static LIST_HEAD(cipher_algs);
......@@ -337,6 +341,12 @@ static int ccp_register_algs(void)
return ret;
}
if (!des3_disable) {
ret = ccp_register_des3_algs(&cipher_algs);
if (ret)
return ret;
}
if (!sha_disable) {
ret = ccp_register_sha_algs(&hash_algs);
if (ret)
......
......@@ -23,6 +23,8 @@
#include <crypto/hash.h>
#include <crypto/sha.h>
#define CCP_LOG_LEVEL KERN_INFO
#define CCP_CRA_PRIORITY 300
struct ccp_crypto_ablkcipher_alg {
......@@ -137,6 +139,24 @@ struct ccp_aes_cmac_exp_ctx {
u8 buf[AES_BLOCK_SIZE];
};
/***** 3DES related defines *****/
struct ccp_des3_ctx {
enum ccp_engine engine;
enum ccp_des3_type type;
enum ccp_des3_mode mode;
struct scatterlist key_sg;
unsigned int key_len;
u8 key[AES_MAX_KEY_SIZE];
};
struct ccp_des3_req_ctx {
struct scatterlist iv_sg;
u8 iv[AES_BLOCK_SIZE];
struct ccp_cmd cmd;
};
/* SHA-related defines
* These values must be large enough to accommodate any variant
*/
......@@ -201,6 +221,7 @@ struct ccp_ctx {
union {
struct ccp_aes_ctx aes;
struct ccp_sha_ctx sha;
struct ccp_des3_ctx des3;
} u;
};
......@@ -213,5 +234,6 @@ int ccp_register_aes_algs(struct list_head *head);
int ccp_register_aes_cmac_algs(struct list_head *head);
int ccp_register_aes_xts_algs(struct list_head *head);
int ccp_register_sha_algs(struct list_head *head);
int ccp_register_des3_algs(struct list_head *head);
#endif
......@@ -553,6 +553,7 @@ static irqreturn_t ccp_irq_handler(int irq, void *data)
static const struct ccp_actions ccp3_actions = {
.aes = ccp_perform_aes,
.xts_aes = ccp_perform_xts_aes,
.des3 = NULL,
.sha = ccp_perform_sha,
.rsa = ccp_perform_rsa,
.passthru = ccp_perform_passthru,
......
......@@ -107,6 +107,12 @@ union ccp_function {
u16 rsvd:5;
u16 type:2;
} aes_xts;
struct {
u16 size:7;
u16 encrypt:1;
u16 mode:5;
u16 type:2;
} des3;
struct {
u16 rsvd1:10;
u16 type:4;
......@@ -139,6 +145,10 @@ union ccp_function {
#define CCP_AES_TYPE(p) ((p)->aes.type)
#define CCP_XTS_SIZE(p) ((p)->aes_xts.size)
#define CCP_XTS_ENCRYPT(p) ((p)->aes_xts.encrypt)
#define CCP_DES3_SIZE(p) ((p)->des3.size)
#define CCP_DES3_ENCRYPT(p) ((p)->des3.encrypt)
#define CCP_DES3_MODE(p) ((p)->des3.mode)
#define CCP_DES3_TYPE(p) ((p)->des3.type)
#define CCP_SHA_TYPE(p) ((p)->sha.type)
#define CCP_RSA_SIZE(p) ((p)->rsa.size)
#define CCP_PT_BYTESWAP(p) ((p)->pt.byteswap)
......@@ -388,6 +398,47 @@ static int ccp5_perform_sha(struct ccp_op *op)
return ccp5_do_cmd(&desc, op->cmd_q);
}
static int ccp5_perform_des3(struct ccp_op *op)
{
struct ccp5_desc desc;
union ccp_function function;
u32 key_addr = op->sb_key * LSB_ITEM_SIZE;
/* Zero out all the fields of the command desc */
memset(&desc, 0, sizeof(struct ccp5_desc));
CCP5_CMD_ENGINE(&desc) = CCP_ENGINE_DES3;
CCP5_CMD_SOC(&desc) = op->soc;
CCP5_CMD_IOC(&desc) = 1;
CCP5_CMD_INIT(&desc) = op->init;
CCP5_CMD_EOM(&desc) = op->eom;
CCP5_CMD_PROT(&desc) = 0;
function.raw = 0;
CCP_DES3_ENCRYPT(&function) = op->u.des3.action;
CCP_DES3_MODE(&function) = op->u.des3.mode;
CCP_DES3_TYPE(&function) = op->u.des3.type;
CCP5_CMD_FUNCTION(&desc) = cpu_to_le32(function.raw);
CCP5_CMD_LEN(&desc) = cpu_to_le32(op->src.u.dma.length);
CCP5_CMD_SRC_LO(&desc) = cpu_to_le32(ccp_addr_lo(&op->src.u.dma));
CCP5_CMD_SRC_HI(&desc) = cpu_to_le32(ccp_addr_hi(&op->src.u.dma));
CCP5_CMD_SRC_MEM(&desc) = cpu_to_le32(CCP_MEMTYPE_SYSTEM);
CCP5_CMD_DST_LO(&desc) = cpu_to_le32(ccp_addr_lo(&op->dst.u.dma));
CCP5_CMD_DST_HI(&desc) = cpu_to_le32(ccp_addr_hi(&op->dst.u.dma));
CCP5_CMD_DST_MEM(&desc) = cpu_to_le32(CCP_MEMTYPE_SYSTEM);
CCP5_CMD_KEY_LO(&desc) = cpu_to_le32(lower_32_bits(key_addr));
CCP5_CMD_KEY_HI(&desc) = 0;
CCP5_CMD_KEY_MEM(&desc) = cpu_to_le32(CCP_MEMTYPE_SB);
CCP5_CMD_LSB_ID(&desc) = cpu_to_le32(op->sb_ctx);
return ccp5_do_cmd(&desc, op->cmd_q);
}
static int ccp5_perform_rsa(struct ccp_op *op)
{
struct ccp5_desc desc;
......@@ -435,6 +486,7 @@ static int ccp5_perform_passthru(struct ccp_op *op)
struct ccp_dma_info *saddr = &op->src.u.dma;
struct ccp_dma_info *daddr = &op->dst.u.dma;
memset(&desc, 0, Q_DESC_SIZE);
CCP5_CMD_ENGINE(&desc) = CCP_ENGINE_PASSTHRU;
......@@ -729,6 +781,7 @@ static int ccp5_init(struct ccp_device *ccp)
dev_dbg(dev, "queue #%u available\n", i);
}
if (ccp->cmd_q_count == 0) {
dev_notice(dev, "no command queues available\n");
ret = -EIO;
......@@ -994,6 +1047,7 @@ static const struct ccp_actions ccp5_actions = {
.aes = ccp5_perform_aes,
.xts_aes = ccp5_perform_xts_aes,
.sha = ccp5_perform_sha,
.des3 = ccp5_perform_des3,
.rsa = ccp5_perform_rsa,
.passthru = ccp5_perform_passthru,
.ecc = ccp5_perform_ecc,
......
......@@ -190,6 +190,9 @@
#define CCP_XTS_AES_KEY_SB_COUNT 1
#define CCP_XTS_AES_CTX_SB_COUNT 1
#define CCP_DES3_KEY_SB_COUNT 1
#define CCP_DES3_CTX_SB_COUNT 1
#define CCP_SHA_SB_COUNT 1
#define CCP_RSA_MAX_WIDTH 4096
......@@ -475,6 +478,12 @@ struct ccp_xts_aes_op {
enum ccp_xts_aes_unit_size unit_size;
};
struct ccp_des3_op {
enum ccp_des3_type type;
enum ccp_des3_mode mode;
enum ccp_des3_action action;
};
struct ccp_sha_op {
enum ccp_sha_type type;
u64 msg_bits;
......@@ -512,6 +521,7 @@ struct ccp_op {
union {
struct ccp_aes_op aes;
struct ccp_xts_aes_op xts;
struct ccp_des3_op des3;
struct ccp_sha_op sha;
struct ccp_rsa_op rsa;
struct ccp_passthru_op passthru;
......@@ -620,13 +630,13 @@ void ccp_dmaengine_unregister(struct ccp_device *ccp);
struct ccp_actions {
int (*aes)(struct ccp_op *);
int (*xts_aes)(struct ccp_op *);
int (*des3)(struct ccp_op *);
int (*sha)(struct ccp_op *);
int (*rsa)(struct ccp_op *);
int (*passthru)(struct ccp_op *);
int (*ecc)(struct ccp_op *);
u32 (*sballoc)(struct ccp_cmd_queue *, unsigned int);
void (*sbfree)(struct ccp_cmd_queue *, unsigned int,
unsigned int);
void (*sbfree)(struct ccp_cmd_queue *, unsigned int, unsigned int);
unsigned int (*get_free_slots)(struct ccp_cmd_queue *);
int (*init)(struct ccp_device *);
void (*destroy)(struct ccp_device *);
......
......@@ -16,6 +16,7 @@
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <crypto/scatterwalk.h>
#include <crypto/des.h>
#include <linux/ccp.h>
#include "ccp-dev.h"
......@@ -939,6 +940,200 @@ static int ccp_run_xts_aes_cmd(struct ccp_cmd_queue *cmd_q,
return ret;
}
static int ccp_run_des3_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd)
{
struct ccp_des3_engine *des3 = &cmd->u.des3;
struct ccp_dm_workarea key, ctx;
struct ccp_data src, dst;
struct ccp_op op;
unsigned int dm_offset;
unsigned int len_singlekey;
bool in_place = false;
int ret;
/* Error checks */
if (!cmd_q->ccp->vdata->perform->des3)
return -EINVAL;
if (des3->key_len != DES3_EDE_KEY_SIZE)
return -EINVAL;
if (((des3->mode == CCP_DES3_MODE_ECB) ||
(des3->mode == CCP_DES3_MODE_CBC)) &&
(des3->src_len & (DES3_EDE_BLOCK_SIZE - 1)))
return -EINVAL;
if (!des3->key || !des3->src || !des3->dst)
return -EINVAL;
if (des3->mode != CCP_DES3_MODE_ECB) {
if (des3->iv_len != DES3_EDE_BLOCK_SIZE)
return -EINVAL;
if (!des3->iv)
return -EINVAL;
}
ret = -EIO;
/* Zero out all the fields of the command desc */
memset(&op, 0, sizeof(op));
/* Set up the Function field */
op.cmd_q = cmd_q;
op.jobid = CCP_NEW_JOBID(cmd_q->ccp);
op.sb_key = cmd_q->sb_key;
op.init = (des3->mode == CCP_DES3_MODE_ECB) ? 0 : 1;
op.u.des3.type = des3->type;
op.u.des3.mode = des3->mode;
op.u.des3.action = des3->action;
/*
* All supported key sizes fit in a single (32-byte) KSB entry and
* (like AES) must be in little endian format. Use the 256-bit byte
* swap passthru option to convert from big endian to little endian.
*/
ret = ccp_init_dm_workarea(&key, cmd_q,
CCP_DES3_KEY_SB_COUNT * CCP_SB_BYTES,
DMA_TO_DEVICE);
if (ret)
return ret;
/*
* The contents of the key triplet are in the reverse order of what
* is required by the engine. Copy the 3 pieces individually to put
* them where they belong.
*/
dm_offset = CCP_SB_BYTES - des3->key_len; /* Basic offset */
len_singlekey = des3->key_len / 3;
ccp_set_dm_area(&key, dm_offset + 2 * len_singlekey,
des3->key, 0, len_singlekey);
ccp_set_dm_area(&key, dm_offset + len_singlekey,
des3->key, len_singlekey, len_singlekey);
ccp_set_dm_area(&key, dm_offset,
des3->key, 2 * len_singlekey, len_singlekey);
/* Copy the key to the SB */
ret = ccp_copy_to_sb(cmd_q, &key, op.jobid, op.sb_key,
CCP_PASSTHRU_BYTESWAP_256BIT);
if (ret) {
cmd->engine_error = cmd_q->cmd_error;
goto e_key;
}
/*
* The DES3 context fits in a single (32-byte) KSB entry and
* must be in little endian format. Use the 256-bit byte swap
* passthru option to convert from big endian to little endian.
*/
if (des3->mode != CCP_DES3_MODE_ECB) {
u32 load_mode;
op.sb_ctx = cmd_q->sb_ctx;
ret = ccp_init_dm_workarea(&ctx, cmd_q,
CCP_DES3_CTX_SB_COUNT * CCP_SB_BYTES,
DMA_BIDIRECTIONAL);
if (ret)
goto e_key;
/* Load the context into the LSB */
dm_offset = CCP_SB_BYTES - des3->iv_len;
ccp_set_dm_area(&ctx, dm_offset, des3->iv, 0, des3->iv_len);
if (cmd_q->ccp->vdata->version == CCP_VERSION(3, 0))
load_mode = CCP_PASSTHRU_BYTESWAP_NOOP;
else
load_mode = CCP_PASSTHRU_BYTESWAP_256BIT;
ret = ccp_copy_to_sb(cmd_q, &ctx, op.jobid, op.sb_ctx,
load_mode);
if (ret) {
cmd->engine_error = cmd_q->cmd_error;
goto e_ctx;
}
}
/*
* Prepare the input and output data workareas. For in-place