1d2912cb1SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 2990672d4SGary R Hook /* 3990672d4SGary R Hook * AMD Cryptographic Coprocessor (CCP) DES3 crypto API support 4990672d4SGary R Hook * 568cc652fSGary R Hook * Copyright (C) 2016,2017 Advanced Micro Devices, Inc. 6990672d4SGary R Hook * 7990672d4SGary R Hook * Author: Gary R Hook <ghook@amd.com> 8990672d4SGary R Hook */ 9990672d4SGary R Hook 10990672d4SGary R Hook #include <linux/module.h> 11990672d4SGary R Hook #include <linux/sched.h> 12990672d4SGary R Hook #include <linux/delay.h> 13990672d4SGary R Hook #include <linux/scatterlist.h> 14990672d4SGary R Hook #include <linux/crypto.h> 15990672d4SGary R Hook #include <crypto/algapi.h> 16990672d4SGary R Hook #include <crypto/scatterwalk.h> 17b5250416SArd Biesheuvel #include <crypto/internal/des.h> 18990672d4SGary R Hook 19990672d4SGary R Hook #include "ccp-crypto.h" 20990672d4SGary R Hook 21990672d4SGary R Hook static int ccp_des3_complete(struct crypto_async_request *async_req, int ret) 22990672d4SGary R Hook { 23be9fe620SArd Biesheuvel struct skcipher_request *req = skcipher_request_cast(async_req); 24990672d4SGary R Hook struct ccp_ctx *ctx = crypto_tfm_ctx(req->base.tfm); 25be9fe620SArd Biesheuvel struct ccp_des3_req_ctx *rctx = skcipher_request_ctx(req); 26990672d4SGary R Hook 27990672d4SGary R Hook if (ret) 28990672d4SGary R Hook return ret; 29990672d4SGary R Hook 30990672d4SGary R Hook if (ctx->u.des3.mode != CCP_DES3_MODE_ECB) 31be9fe620SArd Biesheuvel memcpy(req->iv, rctx->iv, DES3_EDE_BLOCK_SIZE); 32990672d4SGary R Hook 33990672d4SGary R Hook return 0; 34990672d4SGary R Hook } 35990672d4SGary R Hook 36be9fe620SArd Biesheuvel static int ccp_des3_setkey(struct crypto_skcipher *tfm, const u8 *key, 37990672d4SGary R Hook unsigned int key_len) 38990672d4SGary R Hook { 39be9fe620SArd Biesheuvel struct ccp_crypto_skcipher_alg *alg = ccp_crypto_skcipher_alg(tfm); 40be9fe620SArd Biesheuvel struct ccp_ctx *ctx = crypto_skcipher_ctx(tfm); 4176a329cdSHerbert Xu int err; 42990672d4SGary R Hook 43be9fe620SArd Biesheuvel err = verify_skcipher_des3_key(tfm, key); 44b5250416SArd Biesheuvel if (err) 4576a329cdSHerbert Xu return err; 46990672d4SGary R Hook 47990672d4SGary R Hook /* It's not clear that there is any support for a keysize of 112. 48990672d4SGary R Hook * If needed, the caller should make K1 == K3 49990672d4SGary R Hook */ 50990672d4SGary R Hook ctx->u.des3.type = CCP_DES3_TYPE_168; 51990672d4SGary R Hook ctx->u.des3.mode = alg->mode; 52990672d4SGary R Hook ctx->u.des3.key_len = key_len; 53990672d4SGary R Hook 54990672d4SGary R Hook memcpy(ctx->u.des3.key, key, key_len); 55990672d4SGary R Hook sg_init_one(&ctx->u.des3.key_sg, ctx->u.des3.key, key_len); 56990672d4SGary R Hook 57990672d4SGary R Hook return 0; 58990672d4SGary R Hook } 59990672d4SGary R Hook 60be9fe620SArd Biesheuvel static int ccp_des3_crypt(struct skcipher_request *req, bool encrypt) 61990672d4SGary R Hook { 62be9fe620SArd Biesheuvel struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); 63be9fe620SArd Biesheuvel struct ccp_ctx *ctx = crypto_skcipher_ctx(tfm); 64be9fe620SArd Biesheuvel struct ccp_des3_req_ctx *rctx = skcipher_request_ctx(req); 65990672d4SGary R Hook struct scatterlist *iv_sg = NULL; 66990672d4SGary R Hook unsigned int iv_len = 0; 67990672d4SGary R Hook int ret; 68990672d4SGary R Hook 69990672d4SGary R Hook if (!ctx->u.des3.key_len) 70990672d4SGary R Hook return -EINVAL; 71990672d4SGary R Hook 72990672d4SGary R Hook if (((ctx->u.des3.mode == CCP_DES3_MODE_ECB) || 73990672d4SGary R Hook (ctx->u.des3.mode == CCP_DES3_MODE_CBC)) && 74be9fe620SArd Biesheuvel (req->cryptlen & (DES3_EDE_BLOCK_SIZE - 1))) 75990672d4SGary R Hook return -EINVAL; 76990672d4SGary R Hook 77990672d4SGary R Hook if (ctx->u.des3.mode != CCP_DES3_MODE_ECB) { 78be9fe620SArd Biesheuvel if (!req->iv) 79990672d4SGary R Hook return -EINVAL; 80990672d4SGary R Hook 81be9fe620SArd Biesheuvel memcpy(rctx->iv, req->iv, DES3_EDE_BLOCK_SIZE); 82990672d4SGary R Hook iv_sg = &rctx->iv_sg; 83990672d4SGary R Hook iv_len = DES3_EDE_BLOCK_SIZE; 84990672d4SGary R Hook sg_init_one(iv_sg, rctx->iv, iv_len); 85990672d4SGary R Hook } 86990672d4SGary R Hook 87990672d4SGary R Hook memset(&rctx->cmd, 0, sizeof(rctx->cmd)); 88990672d4SGary R Hook INIT_LIST_HEAD(&rctx->cmd.entry); 89990672d4SGary R Hook rctx->cmd.engine = CCP_ENGINE_DES3; 90990672d4SGary R Hook rctx->cmd.u.des3.type = ctx->u.des3.type; 91990672d4SGary R Hook rctx->cmd.u.des3.mode = ctx->u.des3.mode; 92990672d4SGary R Hook rctx->cmd.u.des3.action = (encrypt) 93990672d4SGary R Hook ? CCP_DES3_ACTION_ENCRYPT 94990672d4SGary R Hook : CCP_DES3_ACTION_DECRYPT; 95990672d4SGary R Hook rctx->cmd.u.des3.key = &ctx->u.des3.key_sg; 96990672d4SGary R Hook rctx->cmd.u.des3.key_len = ctx->u.des3.key_len; 97990672d4SGary R Hook rctx->cmd.u.des3.iv = iv_sg; 98990672d4SGary R Hook rctx->cmd.u.des3.iv_len = iv_len; 99990672d4SGary R Hook rctx->cmd.u.des3.src = req->src; 100be9fe620SArd Biesheuvel rctx->cmd.u.des3.src_len = req->cryptlen; 101990672d4SGary R Hook rctx->cmd.u.des3.dst = req->dst; 102990672d4SGary R Hook 103990672d4SGary R Hook ret = ccp_crypto_enqueue_request(&req->base, &rctx->cmd); 104990672d4SGary R Hook 105990672d4SGary R Hook return ret; 106990672d4SGary R Hook } 107990672d4SGary R Hook 108be9fe620SArd Biesheuvel static int ccp_des3_encrypt(struct skcipher_request *req) 109990672d4SGary R Hook { 110990672d4SGary R Hook return ccp_des3_crypt(req, true); 111990672d4SGary R Hook } 112990672d4SGary R Hook 113be9fe620SArd Biesheuvel static int ccp_des3_decrypt(struct skcipher_request *req) 114990672d4SGary R Hook { 115990672d4SGary R Hook return ccp_des3_crypt(req, false); 116990672d4SGary R Hook } 117990672d4SGary R Hook 118be9fe620SArd Biesheuvel static int ccp_des3_init_tfm(struct crypto_skcipher *tfm) 119990672d4SGary R Hook { 120be9fe620SArd Biesheuvel struct ccp_ctx *ctx = crypto_skcipher_ctx(tfm); 121990672d4SGary R Hook 122990672d4SGary R Hook ctx->complete = ccp_des3_complete; 123990672d4SGary R Hook ctx->u.des3.key_len = 0; 124990672d4SGary R Hook 125be9fe620SArd Biesheuvel crypto_skcipher_set_reqsize(tfm, sizeof(struct ccp_des3_req_ctx)); 126990672d4SGary R Hook 127990672d4SGary R Hook return 0; 128990672d4SGary R Hook } 129990672d4SGary R Hook 130be9fe620SArd Biesheuvel static const struct skcipher_alg ccp_des3_defaults = { 131990672d4SGary R Hook .setkey = ccp_des3_setkey, 132990672d4SGary R Hook .encrypt = ccp_des3_encrypt, 133990672d4SGary R Hook .decrypt = ccp_des3_decrypt, 134990672d4SGary R Hook .min_keysize = DES3_EDE_KEY_SIZE, 135990672d4SGary R Hook .max_keysize = DES3_EDE_KEY_SIZE, 136be9fe620SArd Biesheuvel .init = ccp_des3_init_tfm, 137be9fe620SArd Biesheuvel 138be9fe620SArd Biesheuvel .base.cra_flags = CRYPTO_ALG_ASYNC | 139be9fe620SArd Biesheuvel CRYPTO_ALG_KERN_DRIVER_ONLY | 140be9fe620SArd Biesheuvel CRYPTO_ALG_NEED_FALLBACK, 141be9fe620SArd Biesheuvel .base.cra_blocksize = DES3_EDE_BLOCK_SIZE, 142be9fe620SArd Biesheuvel .base.cra_ctxsize = sizeof(struct ccp_ctx), 143be9fe620SArd Biesheuvel .base.cra_priority = CCP_CRA_PRIORITY, 144be9fe620SArd Biesheuvel .base.cra_module = THIS_MODULE, 145990672d4SGary R Hook }; 146990672d4SGary R Hook 147990672d4SGary R Hook struct ccp_des3_def { 148990672d4SGary R Hook enum ccp_des3_mode mode; 149990672d4SGary R Hook unsigned int version; 150990672d4SGary R Hook const char *name; 151990672d4SGary R Hook const char *driver_name; 152990672d4SGary R Hook unsigned int blocksize; 153990672d4SGary R Hook unsigned int ivsize; 154be9fe620SArd Biesheuvel const struct skcipher_alg *alg_defaults; 155990672d4SGary R Hook }; 156990672d4SGary R Hook 157be9fe620SArd Biesheuvel static const struct ccp_des3_def des3_algs[] = { 158990672d4SGary R Hook { 159990672d4SGary R Hook .mode = CCP_DES3_MODE_ECB, 160990672d4SGary R Hook .version = CCP_VERSION(5, 0), 161990672d4SGary R Hook .name = "ecb(des3_ede)", 162990672d4SGary R Hook .driver_name = "ecb-des3-ccp", 163990672d4SGary R Hook .blocksize = DES3_EDE_BLOCK_SIZE, 164990672d4SGary R Hook .ivsize = 0, 165990672d4SGary R Hook .alg_defaults = &ccp_des3_defaults, 166990672d4SGary R Hook }, 167990672d4SGary R Hook { 168990672d4SGary R Hook .mode = CCP_DES3_MODE_CBC, 169990672d4SGary R Hook .version = CCP_VERSION(5, 0), 170990672d4SGary R Hook .name = "cbc(des3_ede)", 171990672d4SGary R Hook .driver_name = "cbc-des3-ccp", 172990672d4SGary R Hook .blocksize = DES3_EDE_BLOCK_SIZE, 173990672d4SGary R Hook .ivsize = DES3_EDE_BLOCK_SIZE, 174990672d4SGary R Hook .alg_defaults = &ccp_des3_defaults, 175990672d4SGary R Hook }, 176990672d4SGary R Hook }; 177990672d4SGary R Hook 178990672d4SGary R Hook static int ccp_register_des3_alg(struct list_head *head, 179990672d4SGary R Hook const struct ccp_des3_def *def) 180990672d4SGary R Hook { 181be9fe620SArd Biesheuvel struct ccp_crypto_skcipher_alg *ccp_alg; 182be9fe620SArd Biesheuvel struct skcipher_alg *alg; 183990672d4SGary R Hook int ret; 184990672d4SGary R Hook 185990672d4SGary R Hook ccp_alg = kzalloc(sizeof(*ccp_alg), GFP_KERNEL); 186990672d4SGary R Hook if (!ccp_alg) 187990672d4SGary R Hook return -ENOMEM; 188990672d4SGary R Hook 189990672d4SGary R Hook INIT_LIST_HEAD(&ccp_alg->entry); 190990672d4SGary R Hook 191990672d4SGary R Hook ccp_alg->mode = def->mode; 192990672d4SGary R Hook 193990672d4SGary R Hook /* Copy the defaults and override as necessary */ 194990672d4SGary R Hook alg = &ccp_alg->alg; 195990672d4SGary R Hook *alg = *def->alg_defaults; 196be9fe620SArd Biesheuvel snprintf(alg->base.cra_name, CRYPTO_MAX_ALG_NAME, "%s", def->name); 197be9fe620SArd Biesheuvel snprintf(alg->base.cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s", 198990672d4SGary R Hook def->driver_name); 199be9fe620SArd Biesheuvel alg->base.cra_blocksize = def->blocksize; 200be9fe620SArd Biesheuvel alg->ivsize = def->ivsize; 201990672d4SGary R Hook 202be9fe620SArd Biesheuvel ret = crypto_register_skcipher(alg); 203990672d4SGary R Hook if (ret) { 204be9fe620SArd Biesheuvel pr_err("%s skcipher algorithm registration error (%d)\n", 205be9fe620SArd Biesheuvel alg->base.cra_name, ret); 206990672d4SGary R Hook kfree(ccp_alg); 207990672d4SGary R Hook return ret; 208990672d4SGary R Hook } 209990672d4SGary R Hook 210990672d4SGary R Hook list_add(&ccp_alg->entry, head); 211990672d4SGary R Hook 212990672d4SGary R Hook return 0; 213990672d4SGary R Hook } 214990672d4SGary R Hook 215990672d4SGary R Hook int ccp_register_des3_algs(struct list_head *head) 216990672d4SGary R Hook { 217990672d4SGary R Hook int i, ret; 218990672d4SGary R Hook unsigned int ccpversion = ccp_version(); 219990672d4SGary R Hook 220990672d4SGary R Hook for (i = 0; i < ARRAY_SIZE(des3_algs); i++) { 221990672d4SGary R Hook if (des3_algs[i].version > ccpversion) 222990672d4SGary R Hook continue; 223990672d4SGary R Hook ret = ccp_register_des3_alg(head, &des3_algs[i]); 224990672d4SGary R Hook if (ret) 225990672d4SGary R Hook return ret; 226990672d4SGary R Hook } 227990672d4SGary R Hook 228990672d4SGary R Hook return 0; 229990672d4SGary R Hook } 230