From da3cf67f1bcf25b069a54ff70fd108860242c8f7 Mon Sep 17 00:00:00 2001 From: Gilad Ben-Yossef Date: Thu, 18 Apr 2019 16:38:59 +0300 Subject: [PATCH] crypto: ccree - don't mangle the request assoclen We were mangling the request struct assoclen field. Fix it by keeping an internal version and working on it. Signed-off-by: Gilad Ben-Yossef Signed-off-by: Herbert Xu --- drivers/crypto/ccree/cc_aead.c | 40 +++++++++++++++++----------- drivers/crypto/ccree/cc_aead.h | 1 + drivers/crypto/ccree/cc_buffer_mgr.c | 22 +++++++-------- 3 files changed, 37 insertions(+), 26 deletions(-) diff --git a/drivers/crypto/ccree/cc_aead.c b/drivers/crypto/ccree/cc_aead.c index 0141c6780810..a49814d29714 100644 --- a/drivers/crypto/ccree/cc_aead.c +++ b/drivers/crypto/ccree/cc_aead.c @@ -764,7 +764,7 @@ static void cc_set_assoc_desc(struct aead_request *areq, unsigned int flow_mode, dev_dbg(dev, "ASSOC buffer type DLLI\n"); hw_desc_init(&desc[idx]); set_din_type(&desc[idx], DMA_DLLI, sg_dma_address(areq->src), - areq->assoclen, NS_BIT); + areq_ctx->assoclen, NS_BIT); set_flow_mode(&desc[idx], flow_mode); if (ctx->auth_mode == DRV_HASH_XCBC_MAC && areq_ctx->cryptlen > 0) @@ -1113,9 +1113,11 @@ static void cc_proc_header_desc(struct aead_request *req, struct cc_hw_desc desc[], unsigned int *seq_size) { + struct aead_req_ctx *areq_ctx = aead_request_ctx(req); unsigned int idx = *seq_size; + /* Hash associated data */ - if (req->assoclen > 0) + if (areq_ctx->assoclen > 0) cc_set_assoc_desc(req, DIN_HASH, desc, &idx); /* Hash IV */ @@ -1343,7 +1345,7 @@ static int validate_data_size(struct cc_aead_ctx *ctx, { struct aead_req_ctx *areq_ctx = aead_request_ctx(req); struct device *dev = drvdata_to_dev(ctx->drvdata); - unsigned int assoclen = req->assoclen; + unsigned int assoclen = areq_ctx->assoclen; unsigned int cipherlen = (direct == DRV_CRYPTO_DIRECTION_DECRYPT) ? (req->cryptlen - ctx->authsize) : req->cryptlen; @@ -1502,7 +1504,7 @@ static int cc_ccm(struct aead_request *req, struct cc_hw_desc desc[], idx++; /* process assoc data */ - if (req->assoclen > 0) { + if (req_ctx->assoclen > 0) { cc_set_assoc_desc(req, DIN_HASH, desc, &idx); } else { hw_desc_init(&desc[idx]); @@ -1594,7 +1596,7 @@ static int config_ccm_adata(struct aead_request *req) * NIST Special Publication 800-38C */ *b0 |= (8 * ((m - 2) / 2)); - if (req->assoclen > 0) + if (req_ctx->assoclen > 0) *b0 |= 64; /* Enable bit 6 if Adata exists. */ rc = set_msg_len(b0 + 16 - l, cryptlen, l); /* Write L'. */ @@ -1605,7 +1607,7 @@ static int config_ccm_adata(struct aead_request *req) /* END of "taken from crypto/ccm.c" */ /* l(a) - size of associated data. */ - req_ctx->ccm_hdr_size = format_ccm_a0(a0, req->assoclen); + req_ctx->ccm_hdr_size = format_ccm_a0(a0, req_ctx->assoclen); memset(req->iv + 15 - req->iv[0], 0, req->iv[0] + 1); req->iv[15] = 1; @@ -1637,7 +1639,7 @@ static void cc_proc_rfc4309_ccm(struct aead_request *req) memcpy(areq_ctx->ctr_iv + CCM_BLOCK_IV_OFFSET, req->iv, CCM_BLOCK_IV_SIZE); req->iv = areq_ctx->ctr_iv; - req->assoclen -= CCM_BLOCK_IV_SIZE; + areq_ctx->assoclen -= CCM_BLOCK_IV_SIZE; } static void cc_set_ghash_desc(struct aead_request *req, @@ -1845,7 +1847,7 @@ static int cc_gcm(struct aead_request *req, struct cc_hw_desc desc[], // for gcm and rfc4106. cc_set_ghash_desc(req, desc, seq_size); /* process(ghash) assoc data */ - if (req->assoclen > 0) + if (req_ctx->assoclen > 0) cc_set_assoc_desc(req, DIN_HASH, desc, seq_size); cc_set_gctr_desc(req, desc, seq_size); /* process(gctr+ghash) */ @@ -1869,8 +1871,8 @@ static int config_gcm_context(struct aead_request *req) (req->cryptlen - ctx->authsize); __be32 counter = cpu_to_be32(2); - dev_dbg(dev, "%s() cryptlen = %d, req->assoclen = %d ctx->authsize = %d\n", - __func__, cryptlen, req->assoclen, ctx->authsize); + dev_dbg(dev, "%s() cryptlen = %d, req_ctx->assoclen = %d ctx->authsize = %d\n", + __func__, cryptlen, req_ctx->assoclen, ctx->authsize); memset(req_ctx->hkey, 0, AES_BLOCK_SIZE); @@ -1886,7 +1888,7 @@ static int config_gcm_context(struct aead_request *req) if (!req_ctx->plaintext_authenticate_only) { __be64 temp64; - temp64 = cpu_to_be64(req->assoclen * 8); + temp64 = cpu_to_be64(req_ctx->assoclen * 8); memcpy(&req_ctx->gcm_len_block.len_a, &temp64, sizeof(temp64)); temp64 = cpu_to_be64(cryptlen * 8); memcpy(&req_ctx->gcm_len_block.len_c, &temp64, 8); @@ -1896,8 +1898,8 @@ static int config_gcm_context(struct aead_request *req) */ __be64 temp64; - temp64 = cpu_to_be64((req->assoclen + GCM_BLOCK_RFC4_IV_SIZE + - cryptlen) * 8); + temp64 = cpu_to_be64((req_ctx->assoclen + + GCM_BLOCK_RFC4_IV_SIZE + cryptlen) * 8); memcpy(&req_ctx->gcm_len_block.len_a, &temp64, sizeof(temp64)); temp64 = 0; memcpy(&req_ctx->gcm_len_block.len_c, &temp64, 8); @@ -1917,7 +1919,7 @@ static void cc_proc_rfc4_gcm(struct aead_request *req) memcpy(areq_ctx->ctr_iv + GCM_BLOCK_RFC4_IV_OFFSET, req->iv, GCM_BLOCK_RFC4_IV_SIZE); req->iv = areq_ctx->ctr_iv; - req->assoclen -= GCM_BLOCK_RFC4_IV_SIZE; + areq_ctx->assoclen -= GCM_BLOCK_RFC4_IV_SIZE; } static int cc_proc_aead(struct aead_request *req, @@ -1942,7 +1944,7 @@ static int cc_proc_aead(struct aead_request *req, /* Check data length according to mode */ if (validate_data_size(ctx, direct, req)) { dev_err(dev, "Unsupported crypt/assoc len %d/%d.\n", - req->cryptlen, req->assoclen); + req->cryptlen, areq_ctx->assoclen); crypto_aead_set_flags(tfm, CRYPTO_TFM_RES_BAD_BLOCK_LEN); return -EINVAL; } @@ -2095,6 +2097,7 @@ static int cc_aead_encrypt(struct aead_request *req) /* No generated IV required */ areq_ctx->backup_iv = req->iv; + areq_ctx->assoclen = req->assoclen; areq_ctx->backup_giv = NULL; areq_ctx->is_gcm4543 = false; @@ -2126,6 +2129,7 @@ static int cc_rfc4309_ccm_encrypt(struct aead_request *req) /* No generated IV required */ areq_ctx->backup_iv = req->iv; + areq_ctx->assoclen = req->assoclen; areq_ctx->backup_giv = NULL; areq_ctx->is_gcm4543 = true; @@ -2147,6 +2151,7 @@ static int cc_aead_decrypt(struct aead_request *req) /* No generated IV required */ areq_ctx->backup_iv = req->iv; + areq_ctx->assoclen = req->assoclen; areq_ctx->backup_giv = NULL; areq_ctx->is_gcm4543 = false; @@ -2176,6 +2181,7 @@ static int cc_rfc4309_ccm_decrypt(struct aead_request *req) /* No generated IV required */ areq_ctx->backup_iv = req->iv; + areq_ctx->assoclen = req->assoclen; areq_ctx->backup_giv = NULL; areq_ctx->is_gcm4543 = true; @@ -2295,6 +2301,7 @@ static int cc_rfc4106_gcm_encrypt(struct aead_request *req) /* No generated IV required */ areq_ctx->backup_iv = req->iv; + areq_ctx->assoclen = req->assoclen; areq_ctx->backup_giv = NULL; areq_ctx->plaintext_authenticate_only = false; @@ -2323,6 +2330,7 @@ static int cc_rfc4543_gcm_encrypt(struct aead_request *req) /* No generated IV required */ areq_ctx->backup_iv = req->iv; + areq_ctx->assoclen = req->assoclen; areq_ctx->backup_giv = NULL; cc_proc_rfc4_gcm(req); @@ -2354,6 +2362,7 @@ static int cc_rfc4106_gcm_decrypt(struct aead_request *req) /* No generated IV required */ areq_ctx->backup_iv = req->iv; + areq_ctx->assoclen = req->assoclen; areq_ctx->backup_giv = NULL; areq_ctx->plaintext_authenticate_only = false; @@ -2382,6 +2391,7 @@ static int cc_rfc4543_gcm_decrypt(struct aead_request *req) /* No generated IV required */ areq_ctx->backup_iv = req->iv; + areq_ctx->assoclen = req->assoclen; areq_ctx->backup_giv = NULL; cc_proc_rfc4_gcm(req); diff --git a/drivers/crypto/ccree/cc_aead.h b/drivers/crypto/ccree/cc_aead.h index 6cfae15f85e5..e51724b96c56 100644 --- a/drivers/crypto/ccree/cc_aead.h +++ b/drivers/crypto/ccree/cc_aead.h @@ -67,6 +67,7 @@ struct aead_req_ctx { u8 backup_mac[MAX_MAC_SIZE]; u8 *backup_iv; /*store iv for generated IV flow*/ u8 *backup_giv; /*store iv for rfc3686(ctr) flow*/ + u32 assoclen; /* internal assoclen */ dma_addr_t mac_buf_dma_addr; /* internal ICV DMA buffer */ /* buffer for internal ccm configurations */ dma_addr_t ccm_iv0_dma_addr; diff --git a/drivers/crypto/ccree/cc_buffer_mgr.c b/drivers/crypto/ccree/cc_buffer_mgr.c index 8554cfb2963a..86e498bee0bb 100644 --- a/drivers/crypto/ccree/cc_buffer_mgr.c +++ b/drivers/crypto/ccree/cc_buffer_mgr.c @@ -65,7 +65,7 @@ static void cc_copy_mac(struct device *dev, struct aead_request *req, { struct aead_req_ctx *areq_ctx = aead_request_ctx(req); struct crypto_aead *tfm = crypto_aead_reqtfm(req); - u32 skip = req->assoclen + req->cryptlen; + u32 skip = areq_ctx->assoclen + req->cryptlen; if (areq_ctx->is_gcm4543) skip += crypto_aead_ivsize(tfm); @@ -575,8 +575,8 @@ void cc_unmap_aead_request(struct device *dev, struct aead_request *req) dev_dbg(dev, "Unmapping src sgl: req->src=%pK areq_ctx->src.nents=%u areq_ctx->assoc.nents=%u assoclen:%u cryptlen=%u\n", sg_virt(req->src), areq_ctx->src.nents, areq_ctx->assoc.nents, - req->assoclen, req->cryptlen); - size_to_unmap = req->assoclen + req->cryptlen; + areq_ctx->assoclen, req->cryptlen); + size_to_unmap = areq_ctx->assoclen + req->cryptlen; if (areq_ctx->gen_ctx.op_type == DRV_CRYPTO_DIRECTION_ENCRYPT) size_to_unmap += areq_ctx->req_authsize; if (areq_ctx->is_gcm4543) @@ -663,7 +663,7 @@ static int cc_aead_chain_assoc(struct cc_drvdata *drvdata, struct scatterlist *current_sg = req->src; struct crypto_aead *tfm = crypto_aead_reqtfm(req); unsigned int sg_index = 0; - u32 size_of_assoc = req->assoclen; + u32 size_of_assoc = areq_ctx->assoclen; struct device *dev = drvdata_to_dev(drvdata); if (areq_ctx->is_gcm4543) @@ -674,7 +674,7 @@ static int cc_aead_chain_assoc(struct cc_drvdata *drvdata, goto chain_assoc_exit; } - if (req->assoclen == 0) { + if (areq_ctx->assoclen == 0) { areq_ctx->assoc_buff_type = CC_DMA_BUF_NULL; areq_ctx->assoc.nents = 0; areq_ctx->assoc.mlli_nents = 0; @@ -734,7 +734,7 @@ static int cc_aead_chain_assoc(struct cc_drvdata *drvdata, cc_dma_buf_type(areq_ctx->assoc_buff_type), areq_ctx->assoc.nents); cc_add_sg_entry(dev, sg_data, areq_ctx->assoc.nents, req->src, - req->assoclen, 0, is_last, + areq_ctx->assoclen, 0, is_last, &areq_ctx->assoc.mlli_nents); areq_ctx->assoc_buff_type = CC_DMA_BUF_MLLI; } @@ -893,11 +893,11 @@ static int cc_aead_chain_data(struct cc_drvdata *drvdata, u32 src_mapped_nents = 0, dst_mapped_nents = 0; u32 offset = 0; /* non-inplace mode */ - unsigned int size_for_map = req->assoclen + req->cryptlen; + unsigned int size_for_map = areq_ctx->assoclen + req->cryptlen; struct crypto_aead *tfm = crypto_aead_reqtfm(req); u32 sg_index = 0; bool is_gcm4543 = areq_ctx->is_gcm4543; - u32 size_to_skip = req->assoclen; + u32 size_to_skip = areq_ctx->assoclen; if (is_gcm4543) size_to_skip += crypto_aead_ivsize(tfm); @@ -941,7 +941,7 @@ static int cc_aead_chain_data(struct cc_drvdata *drvdata, areq_ctx->src_offset = offset; if (req->src != req->dst) { - size_for_map = req->assoclen + req->cryptlen; + size_for_map = areq_ctx->assoclen + req->cryptlen; size_for_map += (direct == DRV_CRYPTO_DIRECTION_ENCRYPT) ? authsize : 0; if (is_gcm4543) @@ -1107,7 +1107,7 @@ int cc_map_aead_request(struct cc_drvdata *drvdata, struct aead_request *req) areq_ctx->ccm_iv0_dma_addr = dma_addr; rc = cc_set_aead_conf_buf(dev, areq_ctx, areq_ctx->ccm_config, - &sg_data, req->assoclen); + &sg_data, areq_ctx->assoclen); if (rc) goto aead_map_failure; } @@ -1158,7 +1158,7 @@ int cc_map_aead_request(struct cc_drvdata *drvdata, struct aead_request *req) areq_ctx->gcm_iv_inc2_dma_addr = dma_addr; } - size_to_map = req->cryptlen + req->assoclen; + size_to_map = req->cryptlen + areq_ctx->assoclen; if (areq_ctx->gen_ctx.op_type == DRV_CRYPTO_DIRECTION_ENCRYPT) size_to_map += authsize; -- 2.30.2