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[71.163.245.5]) by smtp.googlemail.com with ESMTPSA id o25sm1988327qtl.37.2021.04.17.06.25.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 17 Apr 2021 06:25:07 -0700 (PDT) From: Thara Gopinath To: herbert@gondor.apana.org.au, davem@davemloft.net, bjorn.andersson@linaro.org Cc: ebiggers@google.com, ardb@kernel.org, sivaprak@codeaurora.org, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org Subject: [Patch v2 4/7] crypto: qce: Add support for AEAD algorithms Date: Sat, 17 Apr 2021 09:25:00 -0400 Message-Id: <20210417132503.1401128-5-thara.gopinath@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210417132503.1401128-1-thara.gopinath@linaro.org> References: <20210417132503.1401128-1-thara.gopinath@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Introduce support to enable following algorithms in Qualcomm Crypto Engine. - authenc(hmac(sha1),cbc(des)) - authenc(hmac(sha1),cbc(des3_ede)) - authenc(hmac(sha256),cbc(des)) - authenc(hmac(sha256),cbc(des3_ede)) - authenc(hmac(sha256),cbc(aes)) - ccm(aes) - rfc4309(ccm(aes)) Signed-off-by: Thara Gopinath --- v1->v2: - Removed spurious totallen from qce_aead_async_req_handle since it was unused as pointed out by Hubert. - Updated qce_dma_prep_sgs to use #nents returned by dma_map_sg rather than using precomputed #nents. drivers/crypto/Kconfig | 15 + drivers/crypto/qce/Makefile | 1 + drivers/crypto/qce/aead.c | 799 ++++++++++++++++++++++++++++++++++++ drivers/crypto/qce/aead.h | 53 +++ drivers/crypto/qce/common.h | 2 + drivers/crypto/qce/core.c | 4 + 6 files changed, 874 insertions(+) create mode 100644 drivers/crypto/qce/aead.c create mode 100644 drivers/crypto/qce/aead.h -- 2.25.1 diff --git a/drivers/crypto/Kconfig b/drivers/crypto/Kconfig index 9a4c275a1335..1fe5b7eafc02 100644 --- a/drivers/crypto/Kconfig +++ b/drivers/crypto/Kconfig @@ -627,6 +627,12 @@ config CRYPTO_DEV_QCE_SHA select CRYPTO_SHA1 select CRYPTO_SHA256 +config CRYPTO_DEV_QCE_AEAD + bool + depends on CRYPTO_DEV_QCE + select CRYPTO_AUTHENC + select CRYPTO_LIB_DES + choice prompt "Algorithms enabled for QCE acceleration" default CRYPTO_DEV_QCE_ENABLE_ALL @@ -647,6 +653,7 @@ choice bool "All supported algorithms" select CRYPTO_DEV_QCE_SKCIPHER select CRYPTO_DEV_QCE_SHA + select CRYPTO_DEV_QCE_AEAD help Enable all supported algorithms: - AES (CBC, CTR, ECB, XTS) @@ -672,6 +679,14 @@ choice - SHA1, HMAC-SHA1 - SHA256, HMAC-SHA256 + config CRYPTO_DEV_QCE_ENABLE_AEAD + bool "AEAD algorithms only" + select CRYPTO_DEV_QCE_AEAD + help + Enable AEAD algorithms only: + - authenc() + - ccm(aes) + - rfc4309(ccm(aes)) endchoice config CRYPTO_DEV_QCE_SW_MAX_LEN diff --git a/drivers/crypto/qce/Makefile b/drivers/crypto/qce/Makefile index 14ade8a7d664..2cf8984e1b85 100644 --- a/drivers/crypto/qce/Makefile +++ b/drivers/crypto/qce/Makefile @@ -6,3 +6,4 @@ qcrypto-objs := core.o \ qcrypto-$(CONFIG_CRYPTO_DEV_QCE_SHA) += sha.o qcrypto-$(CONFIG_CRYPTO_DEV_QCE_SKCIPHER) += skcipher.o +qcrypto-$(CONFIG_CRYPTO_DEV_QCE_AEAD) += aead.o diff --git a/drivers/crypto/qce/aead.c b/drivers/crypto/qce/aead.c new file mode 100644 index 000000000000..ef66ae21eae3 --- /dev/null +++ b/drivers/crypto/qce/aead.c @@ -0,0 +1,799 @@ +// SPDX-License-Identifier: GPL-2.0-only + +/* + * Copyright (C) 2021, Linaro Limited. All rights reserved. + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "aead.h" + +#define CCM_NONCE_ADATA_SHIFT 6 +#define CCM_NONCE_AUTHSIZE_SHIFT 3 +#define MAX_CCM_ADATA_HEADER_LEN 6 + +static LIST_HEAD(aead_algs); + +static void qce_aead_done(void *data) +{ + struct crypto_async_request *async_req = data; + struct aead_request *req = aead_request_cast(async_req); + struct qce_aead_reqctx *rctx = aead_request_ctx(req); + struct qce_aead_ctx *ctx = crypto_tfm_ctx(async_req->tfm); + struct qce_alg_template *tmpl = to_aead_tmpl(crypto_aead_reqtfm(req)); + struct qce_device *qce = tmpl->qce; + struct qce_result_dump *result_buf = qce->dma.result_buf; + enum dma_data_direction dir_src, dir_dst; + bool diff_dst; + int error; + u32 status; + unsigned int totallen; + unsigned char tag[SHA256_DIGEST_SIZE] = {0}; + int ret = 0; + + diff_dst = (req->src != req->dst) ? true : false; + dir_src = diff_dst ? DMA_TO_DEVICE : DMA_BIDIRECTIONAL; + dir_dst = diff_dst ? DMA_FROM_DEVICE : DMA_BIDIRECTIONAL; + + error = qce_dma_terminate_all(&qce->dma); + if (error) + dev_dbg(qce->dev, "aead dma termination error (%d)\n", + error); + if (diff_dst) + dma_unmap_sg(qce->dev, rctx->src_sg, rctx->src_nents, dir_src); + + dma_unmap_sg(qce->dev, rctx->dst_sg, rctx->dst_nents, dir_dst); + + if (IS_CCM(rctx->flags)) { + if (req->assoclen) { + sg_free_table(&rctx->src_tbl); + if (diff_dst) + sg_free_table(&rctx->dst_tbl); + } else { + if (!(IS_DECRYPT(rctx->flags) && !diff_dst)) + sg_free_table(&rctx->dst_tbl); + } + } else { + sg_free_table(&rctx->dst_tbl); + } + + error = qce_check_status(qce, &status); + if (error < 0 && (error != -EBADMSG)) + dev_err(qce->dev, "aead operation error (%x)\n", status); + + if (IS_ENCRYPT(rctx->flags)) { + totallen = req->cryptlen + req->assoclen; + if (IS_CCM(rctx->flags)) + scatterwalk_map_and_copy(rctx->ccmresult_buf, req->dst, + totallen, ctx->authsize, 1); + else + scatterwalk_map_and_copy(result_buf->auth_iv, req->dst, + totallen, ctx->authsize, 1); + + } else if (!IS_CCM(rctx->flags)) { + totallen = req->cryptlen + req->assoclen - ctx->authsize; + scatterwalk_map_and_copy(tag, req->src, totallen, ctx->authsize, 0); + ret = memcmp(result_buf->auth_iv, tag, ctx->authsize); + if (ret) { + pr_err("Bad message error\n"); + error = -EBADMSG; + } + } + + qce->async_req_done(qce, error); +} + +static struct scatterlist * +qce_aead_prepare_result_buf(struct sg_table *tbl, struct aead_request *req) +{ + struct qce_aead_reqctx *rctx = aead_request_ctx(req); + struct qce_alg_template *tmpl = to_aead_tmpl(crypto_aead_reqtfm(req)); + struct qce_device *qce = tmpl->qce; + + sg_init_one(&rctx->result_sg, qce->dma.result_buf, QCE_RESULT_BUF_SZ); + return qce_sgtable_add(tbl, &rctx->result_sg, QCE_RESULT_BUF_SZ); +} + +static struct scatterlist * +qce_aead_prepare_ccm_result_buf(struct sg_table *tbl, struct aead_request *req) +{ + struct qce_aead_reqctx *rctx = aead_request_ctx(req); + + sg_init_one(&rctx->result_sg, rctx->ccmresult_buf, QCE_BAM_BURST_SIZE); + return qce_sgtable_add(tbl, &rctx->result_sg, QCE_BAM_BURST_SIZE); +} + +static struct scatterlist * +qce_aead_prepare_dst_buf(struct aead_request *req) +{ + struct qce_aead_reqctx *rctx = aead_request_ctx(req); + struct qce_alg_template *tmpl = to_aead_tmpl(crypto_aead_reqtfm(req)); + struct qce_device *qce = tmpl->qce; + struct scatterlist *sg, *msg_sg, __sg[2]; + gfp_t gfp; + unsigned int assoclen = req->assoclen; + unsigned int totallen; + int ret; + + totallen = rctx->cryptlen + assoclen; + rctx->dst_nents = sg_nents_for_len(req->dst, totallen); + if (rctx->dst_nents < 0) { + dev_err(qce->dev, "Invalid numbers of dst SG.\n"); + return ERR_PTR(-EINVAL); + } + if (IS_CCM(rctx->flags)) + rctx->dst_nents += 2; + else + rctx->dst_nents += 1; + + gfp = (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ? + GFP_KERNEL : GFP_ATOMIC; + ret = sg_alloc_table(&rctx->dst_tbl, rctx->dst_nents, gfp); + if (ret) + return ERR_PTR(ret); + + if (IS_CCM(rctx->flags) && assoclen) { + /* Get the dst buffer */ + msg_sg = scatterwalk_ffwd(__sg, req->dst, assoclen); + + sg = qce_sgtable_add(&rctx->dst_tbl, &rctx->adata_sg, + rctx->assoclen); + if (IS_ERR(sg)) { + ret = PTR_ERR(sg); + goto dst_tbl_free; + } + /* dst buffer */ + sg = qce_sgtable_add(&rctx->dst_tbl, msg_sg, rctx->cryptlen); + if (IS_ERR(sg)) { + ret = PTR_ERR(sg); + goto dst_tbl_free; + } + totallen = rctx->cryptlen + rctx->assoclen; + } else { + if (totallen) { + sg = qce_sgtable_add(&rctx->dst_tbl, req->dst, totallen); + if (IS_ERR(sg)) + goto dst_tbl_free; + } + } + if (IS_CCM(rctx->flags)) + sg = qce_aead_prepare_ccm_result_buf(&rctx->dst_tbl, req); + else + sg = qce_aead_prepare_result_buf(&rctx->dst_tbl, req); + + if (IS_ERR(sg)) + goto dst_tbl_free; + + sg_mark_end(sg); + rctx->dst_sg = rctx->dst_tbl.sgl; + rctx->dst_nents = sg_nents_for_len(rctx->dst_sg, totallen) + 1; + + return sg; + +dst_tbl_free: + sg_free_table(&rctx->dst_tbl); + return sg; +} + +static int +qce_aead_ccm_prepare_buf_assoclen(struct aead_request *req) +{ + struct scatterlist *sg, *msg_sg, __sg[2]; + struct crypto_aead *tfm = crypto_aead_reqtfm(req); + struct qce_aead_reqctx *rctx = aead_request_ctx(req); + struct qce_aead_ctx *ctx = crypto_aead_ctx(tfm); + unsigned int assoclen = rctx->assoclen; + unsigned int adata_header_len, cryptlen, totallen; + gfp_t gfp; + bool diff_dst; + int ret; + + if (IS_DECRYPT(rctx->flags)) + cryptlen = rctx->cryptlen + ctx->authsize; + else + cryptlen = rctx->cryptlen; + totallen = cryptlen + req->assoclen; + + /* Get the msg */ + msg_sg = scatterwalk_ffwd(__sg, req->src, req->assoclen); + + rctx->adata = kzalloc((ALIGN(assoclen, 16) + MAX_CCM_ADATA_HEADER_LEN) * + sizeof(unsigned char), GFP_ATOMIC); + if (!rctx->adata) + return -ENOMEM; + + /* + * Format associated data (RFC3610 and NIST 800-38C) + * Even though specification allows for AAD to be up to 2^64 - 1 bytes, + * the assoclen field in aead_request is unsigned int and thus limits + * the AAD to be up to 2^32 - 1 bytes. So we handle only two scenarios + * while forming the header for AAD. + */ + if (assoclen < 0xff00) { + adata_header_len = 2; + *(__be16 *)rctx->adata = cpu_to_be16(assoclen); + } else { + adata_header_len = 6; + *(__be16 *)rctx->adata = cpu_to_be16(0xfffe); + *(__be32 *)(rctx->adata + 2) = cpu_to_be32(assoclen); + } + + /* Copy the associated data */ + if (sg_copy_to_buffer(req->src, sg_nents_for_len(req->src, assoclen), + rctx->adata + adata_header_len, + assoclen) != assoclen) + return -EINVAL; + + /* Pad associated data to block size */ + rctx->assoclen = ALIGN(assoclen + adata_header_len, 16); + + diff_dst = (req->src != req->dst) ? true : false; + + if (diff_dst) + rctx->src_nents = sg_nents_for_len(req->src, totallen) + 1; + else + rctx->src_nents = sg_nents_for_len(req->src, totallen) + 2; + + gfp = (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ? GFP_KERNEL : GFP_ATOMIC; + ret = sg_alloc_table(&rctx->src_tbl, rctx->src_nents, gfp); + if (ret) + return ret; + + /* Associated Data */ + sg_init_one(&rctx->adata_sg, rctx->adata, rctx->assoclen); + sg = qce_sgtable_add(&rctx->src_tbl, &rctx->adata_sg, + rctx->assoclen); + if (IS_ERR(sg)) { + ret = PTR_ERR(sg); + goto err_free; + } + /* src msg */ + sg = qce_sgtable_add(&rctx->src_tbl, msg_sg, cryptlen); + if (IS_ERR(sg)) { + ret = PTR_ERR(sg); + goto err_free; + } + if (!diff_dst) { + /* + * For decrypt, when src and dst buffers are same, there is already space + * in the buffer for padded 0's which is output in lieu of + * the MAC that is input. So skip the below. + */ + if (!IS_DECRYPT(rctx->flags)) { + sg = qce_aead_prepare_ccm_result_buf(&rctx->src_tbl, req); + if (IS_ERR(sg)) { + ret = PTR_ERR(sg); + goto err_free; + } + } + } + sg_mark_end(sg); + rctx->src_sg = rctx->src_tbl.sgl; + totallen = cryptlen + rctx->assoclen; + rctx->src_nents = sg_nents_for_len(rctx->src_sg, totallen); + + if (diff_dst) { + sg = qce_aead_prepare_dst_buf(req); + if (IS_ERR(sg)) + goto err_free; + } else { + if (IS_ENCRYPT(rctx->flags)) + rctx->dst_nents = rctx->src_nents + 1; + else + rctx->dst_nents = rctx->src_nents; + rctx->dst_sg = rctx->src_sg; + } + + return 0; +err_free: + sg_free_table(&rctx->src_tbl); + return ret; +} + +static int qce_aead_prepare_buf(struct aead_request *req) +{ + struct qce_aead_reqctx *rctx = aead_request_ctx(req); + struct qce_alg_template *tmpl = to_aead_tmpl(crypto_aead_reqtfm(req)); + struct qce_device *qce = tmpl->qce; + struct scatterlist *sg; + bool diff_dst = (req->src != req->dst) ? true : false; + unsigned int totallen; + + totallen = rctx->cryptlen + rctx->assoclen; + + sg = qce_aead_prepare_dst_buf(req); + if (IS_ERR(sg)) + return PTR_ERR(sg); + if (diff_dst) { + rctx->src_nents = sg_nents_for_len(req->src, totallen); + if (rctx->src_nents < 0) { + dev_err(qce->dev, "Invalid numbers of src SG.\n"); + return -EINVAL; + } + rctx->src_sg = req->src; + } else { + rctx->src_nents = rctx->dst_nents - 1; + rctx->src_sg = rctx->dst_sg; + } + return 0; +} + +static int qce_aead_ccm_prepare_buf(struct aead_request *req) +{ + struct qce_aead_reqctx *rctx = aead_request_ctx(req); + struct crypto_aead *tfm = crypto_aead_reqtfm(req); + struct qce_aead_ctx *ctx = crypto_aead_ctx(tfm); + struct scatterlist *sg; + bool diff_dst = (req->src != req->dst) ? true : false; + unsigned int cryptlen; + + if (rctx->assoclen) + return qce_aead_ccm_prepare_buf_assoclen(req); + + if (IS_ENCRYPT(rctx->flags)) + return qce_aead_prepare_buf(req); + + cryptlen = rctx->cryptlen + ctx->authsize; + if (diff_dst) { + rctx->src_nents = sg_nents_for_len(req->src, cryptlen); + rctx->src_sg = req->src; + sg = qce_aead_prepare_dst_buf(req); + if (IS_ERR(sg)) + return PTR_ERR(sg); + } else { + rctx->src_nents = sg_nents_for_len(req->src, cryptlen); + rctx->src_sg = req->src; + rctx->dst_nents = rctx->src_nents; + rctx->dst_sg = rctx->src_sg; + } + + return 0; +} + +static int qce_aead_create_ccm_nonce(struct qce_aead_reqctx *rctx, struct qce_aead_ctx *ctx) +{ + unsigned int msglen_size, ivsize; + u8 msg_len[4]; + int i; + + if (!rctx || !rctx->iv) + return -EINVAL; + + msglen_size = rctx->iv[0] + 1; + + /* Verify that msg len size is valid */ + if (msglen_size < 2 || msglen_size > 8) + return -EINVAL; + + ivsize = rctx->ivsize; + + /* + * Clear the msglen bytes in IV. + * Else the h/w engine and nonce will use any stray value pending there. + */ + if (!IS_CCM_RFC4309(rctx->flags)) { + for (i = 0; i < msglen_size; i++) + rctx->iv[ivsize - i - 1] = 0; + } + + /* + * The crypto framework encodes cryptlen as unsigned int. Thus, even though + * spec allows for upto 8 bytes to encode msg_len only 4 bytes are needed. + */ + if (msglen_size > 4) + msglen_size = 4; + + memcpy(&msg_len[0], &rctx->cryptlen, 4); + + memcpy(&rctx->ccm_nonce[0], rctx->iv, rctx->ivsize); + if (rctx->assoclen) + rctx->ccm_nonce[0] |= 1 << CCM_NONCE_ADATA_SHIFT; + rctx->ccm_nonce[0] |= ((ctx->authsize - 2) / 2) << + CCM_NONCE_AUTHSIZE_SHIFT; + for (i = 0; i < msglen_size; i++) + rctx->ccm_nonce[QCE_MAX_NONCE - i - 1] = msg_len[i]; + + return 0; +} + +static int +qce_aead_async_req_handle(struct crypto_async_request *async_req) +{ + struct aead_request *req = aead_request_cast(async_req); + struct qce_aead_reqctx *rctx = aead_request_ctx(req); + struct crypto_aead *tfm = crypto_aead_reqtfm(req); + struct qce_aead_ctx *ctx = crypto_tfm_ctx(async_req->tfm); + struct qce_alg_template *tmpl = to_aead_tmpl(crypto_aead_reqtfm(req)); + struct qce_device *qce = tmpl->qce; + enum dma_data_direction dir_src, dir_dst; + bool diff_dst; + int dst_nents, src_nents, ret; + + if (IS_CCM_RFC4309(rctx->flags)) { + memset(rctx->ccm_rfc4309_iv, 0, QCE_MAX_IV_SIZE); + rctx->ccm_rfc4309_iv[0] = 3; + memcpy(&rctx->ccm_rfc4309_iv[1], ctx->ccm4309_salt, QCE_CCM4309_SALT_SIZE); + memcpy(&rctx->ccm_rfc4309_iv[4], req->iv, 8); + rctx->iv = rctx->ccm_rfc4309_iv; + rctx->ivsize = AES_BLOCK_SIZE; + } else { + rctx->iv = req->iv; + rctx->ivsize = crypto_aead_ivsize(tfm); + } + if (IS_CCM_RFC4309(rctx->flags)) + rctx->assoclen = req->assoclen - 8; + else + rctx->assoclen = req->assoclen; + + diff_dst = (req->src != req->dst) ? true : false; + dir_src = diff_dst ? DMA_TO_DEVICE : DMA_BIDIRECTIONAL; + dir_dst = diff_dst ? DMA_FROM_DEVICE : DMA_BIDIRECTIONAL; + + if (IS_CCM(rctx->flags)) { + ret = qce_aead_create_ccm_nonce(rctx, ctx); + if (ret) + return ret; + } + if (IS_CCM(rctx->flags)) + ret = qce_aead_ccm_prepare_buf(req); + else + ret = qce_aead_prepare_buf(req); + + if (ret) + return ret; + dst_nents = dma_map_sg(qce->dev, rctx->dst_sg, rctx->dst_nents, dir_dst); + if (dst_nents < 0) + goto error_free; + + if (diff_dst) { + src_nents = dma_map_sg(qce->dev, rctx->src_sg, rctx->src_nents, dir_src); + if (src_nents < 0) + goto error_unmap_dst; + } else { + if (IS_CCM(rctx->flags) && IS_DECRYPT(rctx->flags)) + src_nents = dst_nents; + else + src_nents = dst_nents - 1; + } + + ret = qce_dma_prep_sgs(&qce->dma, rctx->src_sg, src_nents, rctx->dst_sg, dst_nents, + qce_aead_done, async_req); + if (ret) + goto error_unmap_src; + + qce_dma_issue_pending(&qce->dma); + + ret = qce_start(async_req, tmpl->crypto_alg_type); + if (ret) + goto error_terminate; + + return 0; + +error_terminate: + qce_dma_terminate_all(&qce->dma); +error_unmap_src: + if (diff_dst) + dma_unmap_sg(qce->dev, req->src, rctx->src_nents, dir_src); +error_unmap_dst: + dma_unmap_sg(qce->dev, rctx->dst_sg, rctx->dst_nents, dir_dst); +error_free: + if (IS_CCM(rctx->flags) && rctx->assoclen) { + sg_free_table(&rctx->src_tbl); + if (diff_dst) + sg_free_table(&rctx->dst_tbl); + } else { + sg_free_table(&rctx->dst_tbl); + } + return ret; +} + +static int qce_aead_crypt(struct aead_request *req, int encrypt) +{ + struct crypto_aead *tfm = crypto_aead_reqtfm(req); + struct qce_aead_reqctx *rctx = aead_request_ctx(req); + struct qce_aead_ctx *ctx = crypto_aead_ctx(tfm); + struct qce_alg_template *tmpl = to_aead_tmpl(tfm); + unsigned int blocksize = crypto_aead_blocksize(tfm); + + rctx->flags = tmpl->alg_flags; + rctx->flags |= encrypt ? QCE_ENCRYPT : QCE_DECRYPT; + + if (encrypt) + rctx->cryptlen = req->cryptlen; + else + rctx->cryptlen = req->cryptlen - ctx->authsize; + + /* CE does not handle 0 length messages */ + if (!rctx->cryptlen) { + if (!(IS_CCM(rctx->flags) && IS_DECRYPT(rctx->flags))) + return -EINVAL; + } + + /* + * CBC algorithms require message lengths to be + * multiples of block size. + */ + if (IS_CBC(rctx->flags) && !IS_ALIGNED(rctx->cryptlen, blocksize)) + return -EINVAL; + + /* RFC4309 supported AAD size 16 bytes/20 bytes */ + if (IS_CCM_RFC4309(rctx->flags)) + if (crypto_ipsec_check_assoclen(req->assoclen)) + return -EINVAL; + + return tmpl->qce->async_req_enqueue(tmpl->qce, &req->base); +} + +static int qce_aead_encrypt(struct aead_request *req) +{ + return qce_aead_crypt(req, 1); +} + +static int qce_aead_decrypt(struct aead_request *req) +{ + return qce_aead_crypt(req, 0); +} + +static int qce_aead_ccm_setkey(struct crypto_aead *tfm, const u8 *key, + unsigned int keylen) +{ + struct qce_aead_ctx *ctx = crypto_aead_ctx(tfm); + unsigned long flags = to_aead_tmpl(tfm)->alg_flags; + + if (IS_CCM_RFC4309(flags)) { + if (keylen < QCE_CCM4309_SALT_SIZE) + return -EINVAL; + keylen -= QCE_CCM4309_SALT_SIZE; + memcpy(ctx->ccm4309_salt, key + keylen, QCE_CCM4309_SALT_SIZE); + } + + if (keylen != AES_KEYSIZE_128 && keylen != AES_KEYSIZE_256) + return -EINVAL; + + ctx->enc_keylen = keylen; + ctx->auth_keylen = keylen; + + memcpy(ctx->enc_key, key, keylen); + memcpy(ctx->auth_key, key, keylen); + + return 0; +} + +static int qce_aead_setkey(struct crypto_aead *tfm, const u8 *key, unsigned int keylen) +{ + struct qce_aead_ctx *ctx = crypto_aead_ctx(tfm); + struct crypto_authenc_keys authenc_keys; + unsigned long flags = to_aead_tmpl(tfm)->alg_flags; + u32 _key[6]; + int err; + + err = crypto_authenc_extractkeys(&authenc_keys, key, keylen); + if (err) + return err; + + if (authenc_keys.enckeylen > QCE_MAX_KEY_SIZE || + authenc_keys.authkeylen > QCE_MAX_KEY_SIZE) + return -EINVAL; + + if (IS_DES(flags)) { + err = verify_aead_des_key(tfm, authenc_keys.enckey, authenc_keys.enckeylen); + if (err) + return err; + } else if (IS_3DES(flags)) { + err = verify_aead_des3_key(tfm, authenc_keys.enckey, authenc_keys.enckeylen); + if (err) + return err; + /* + * The crypto engine does not support any two keys + * being the same for triple des algorithms. The + * verify_skcipher_des3_key does not check for all the + * below conditions. Return -EINVAL in case any two keys + * are the same. Revisit to see if a fallback cipher + * is needed to handle this condition. + */ + memcpy(_key, authenc_keys.enckey, DES3_EDE_KEY_SIZE); + if (!((_key[0] ^ _key[2]) | (_key[1] ^ _key[3])) || + !((_key[2] ^ _key[4]) | (_key[3] ^ _key[5])) || + !((_key[0] ^ _key[4]) | (_key[1] ^ _key[5]))) + return -EINVAL; + } else if (IS_AES(flags)) { + /* No random key sizes */ + if (authenc_keys.enckeylen != AES_KEYSIZE_128 && + authenc_keys.enckeylen != AES_KEYSIZE_256) + return -EINVAL; + } + + ctx->enc_keylen = authenc_keys.enckeylen; + ctx->auth_keylen = authenc_keys.authkeylen; + + memcpy(ctx->enc_key, authenc_keys.enckey, authenc_keys.enckeylen); + + memset(ctx->auth_key, 0, sizeof(ctx->auth_key)); + memcpy(ctx->auth_key, authenc_keys.authkey, authenc_keys.authkeylen); + + return 0; +} + +static int qce_aead_setauthsize(struct crypto_aead *tfm, unsigned int authsize) +{ + struct qce_aead_ctx *ctx = crypto_aead_ctx(tfm); + unsigned long flags = to_aead_tmpl(tfm)->alg_flags; + + if (IS_CCM(flags)) { + if (authsize < 4 || authsize > 16 || authsize % 2) + return -EINVAL; + if (IS_CCM_RFC4309(flags) && (authsize < 8 || authsize % 4)) + return -EINVAL; + } + ctx->authsize = authsize; + return 0; +} + +static int qce_aead_init(struct crypto_aead *tfm) +{ + crypto_aead_set_reqsize(tfm, sizeof(struct qce_aead_reqctx)); + return 0; +} + +struct qce_aead_def { + unsigned long flags; + const char *name; + const char *drv_name; + unsigned int blocksize; + unsigned int chunksize; + unsigned int ivsize; + unsigned int maxauthsize; +}; + +static const struct qce_aead_def aead_def[] = { + { + .flags = QCE_ALG_DES | QCE_MODE_CBC | QCE_HASH_SHA1_HMAC, + .name = "authenc(hmac(sha1),cbc(des))", + .drv_name = "authenc-hmac-sha1-cbc-des-qce", + .blocksize = DES_BLOCK_SIZE, + .ivsize = DES_BLOCK_SIZE, + .maxauthsize = SHA1_DIGEST_SIZE, + }, + { + .flags = QCE_ALG_3DES | QCE_MODE_CBC | QCE_HASH_SHA1_HMAC, + .name = "authenc(hmac(sha1),cbc(des3_ede))", + .drv_name = "authenc-hmac-sha1-cbc-3des-qce", + .blocksize = DES3_EDE_BLOCK_SIZE, + .ivsize = DES3_EDE_BLOCK_SIZE, + .maxauthsize = SHA1_DIGEST_SIZE, + }, + { + .flags = QCE_ALG_DES | QCE_MODE_CBC | QCE_HASH_SHA256_HMAC, + .name = "authenc(hmac(sha256),cbc(des))", + .drv_name = "authenc-hmac-sha256-cbc-des-qce", + .blocksize = DES_BLOCK_SIZE, + .ivsize = DES_BLOCK_SIZE, + .maxauthsize = SHA256_DIGEST_SIZE, + }, + { + .flags = QCE_ALG_3DES | QCE_MODE_CBC | QCE_HASH_SHA256_HMAC, + .name = "authenc(hmac(sha256),cbc(des3_ede))", + .drv_name = "authenc-hmac-sha256-cbc-3des-qce", + .blocksize = DES3_EDE_BLOCK_SIZE, + .ivsize = DES3_EDE_BLOCK_SIZE, + .maxauthsize = SHA256_DIGEST_SIZE, + }, + { + .flags = QCE_ALG_AES | QCE_MODE_CBC | QCE_HASH_SHA256_HMAC, + .name = "authenc(hmac(sha256),cbc(aes))", + .drv_name = "authenc-hmac-sha256-cbc-aes-qce", + .blocksize = AES_BLOCK_SIZE, + .ivsize = AES_BLOCK_SIZE, + .maxauthsize = SHA256_DIGEST_SIZE, + }, + { + .flags = QCE_ALG_AES | QCE_MODE_CCM, + .name = "ccm(aes)", + .drv_name = "ccm-aes-qce", + .blocksize = 1, + .ivsize = AES_BLOCK_SIZE, + .maxauthsize = AES_BLOCK_SIZE, + }, + { + .flags = QCE_ALG_AES | QCE_MODE_CCM | QCE_MODE_CCM_RFC4309, + .name = "rfc4309(ccm(aes))", + .drv_name = "rfc4309-ccm-aes-qce", + .blocksize = 1, + .ivsize = 8, + .maxauthsize = AES_BLOCK_SIZE, + }, +}; + +static int qce_aead_register_one(const struct qce_aead_def *def, struct qce_device *qce) +{ + struct qce_alg_template *tmpl; + struct aead_alg *alg; + int ret; + + tmpl = kzalloc(sizeof(*tmpl), GFP_KERNEL); + if (!tmpl) + return -ENOMEM; + + alg = &tmpl->alg.aead; + + snprintf(alg->base.cra_name, CRYPTO_MAX_ALG_NAME, "%s", def->name); + snprintf(alg->base.cra_driver_name, CRYPTO_MAX_ALG_NAME, "%s", + def->drv_name); + + alg->base.cra_blocksize = def->blocksize; + alg->chunksize = def->chunksize; + alg->ivsize = def->ivsize; + alg->maxauthsize = def->maxauthsize; + if (IS_CCM(def->flags)) + alg->setkey = qce_aead_ccm_setkey; + else + alg->setkey = qce_aead_setkey; + alg->setauthsize = qce_aead_setauthsize; + alg->encrypt = qce_aead_encrypt; + alg->decrypt = qce_aead_decrypt; + alg->init = qce_aead_init; + + alg->base.cra_priority = 300; + alg->base.cra_flags = CRYPTO_ALG_ASYNC | + CRYPTO_ALG_ALLOCATES_MEMORY | + CRYPTO_ALG_KERN_DRIVER_ONLY; + alg->base.cra_ctxsize = sizeof(struct qce_aead_ctx); + alg->base.cra_alignmask = 0; + alg->base.cra_module = THIS_MODULE; + + INIT_LIST_HEAD(&tmpl->entry); + tmpl->crypto_alg_type = CRYPTO_ALG_TYPE_AEAD; + tmpl->alg_flags = def->flags; + tmpl->qce = qce; + + ret = crypto_register_aead(alg); + if (ret) { + kfree(tmpl); + dev_err(qce->dev, "%s registration failed\n", alg->base.cra_name); + return ret; + } + + list_add_tail(&tmpl->entry, &aead_algs); + dev_dbg(qce->dev, "%s is registered\n", alg->base.cra_name); + return 0; +} + +static void qce_aead_unregister(struct qce_device *qce) +{ + struct qce_alg_template *tmpl, *n; + + list_for_each_entry_safe(tmpl, n, &aead_algs, entry) { + crypto_unregister_aead(&tmpl->alg.aead); + list_del(&tmpl->entry); + kfree(tmpl); + } +} + +static int qce_aead_register(struct qce_device *qce) +{ + int ret, i; + + for (i = 0; i < ARRAY_SIZE(aead_def); i++) { + ret = qce_aead_register_one(&aead_def[i], qce); + if (ret) + goto err; + } + + return 0; +err: + qce_aead_unregister(qce); + return ret; +} + +const struct qce_algo_ops aead_ops = { + .type = CRYPTO_ALG_TYPE_AEAD, + .register_algs = qce_aead_register, + .unregister_algs = qce_aead_unregister, + .async_req_handle = qce_aead_async_req_handle, +}; diff --git a/drivers/crypto/qce/aead.h b/drivers/crypto/qce/aead.h new file mode 100644 index 000000000000..3d1f2039930b --- /dev/null +++ b/drivers/crypto/qce/aead.h @@ -0,0 +1,53 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2021, Linaro Limited. All rights reserved. + */ + +#ifndef _AEAD_H_ +#define _AEAD_H_ + +#include "common.h" +#include "core.h" + +#define QCE_MAX_KEY_SIZE 64 +#define QCE_CCM4309_SALT_SIZE 3 + +struct qce_aead_ctx { + u8 enc_key[QCE_MAX_KEY_SIZE]; + u8 auth_key[QCE_MAX_KEY_SIZE]; + u8 ccm4309_salt[QCE_CCM4309_SALT_SIZE]; + unsigned int enc_keylen; + unsigned int auth_keylen; + unsigned int authsize; +}; + +struct qce_aead_reqctx { + unsigned long flags; + u8 *iv; + unsigned int ivsize; + int src_nents; + int dst_nents; + struct scatterlist result_sg; + struct scatterlist adata_sg; + struct sg_table dst_tbl; + struct sg_table src_tbl; + struct scatterlist *dst_sg; + struct scatterlist *src_sg; + unsigned int cryptlen; + unsigned int assoclen; + unsigned char *adata; + u8 ccm_nonce[QCE_MAX_NONCE]; + u8 ccmresult_buf[QCE_BAM_BURST_SIZE]; + u8 ccm_rfc4309_iv[QCE_MAX_IV_SIZE]; +}; + +static inline struct qce_alg_template *to_aead_tmpl(struct crypto_aead *tfm) +{ + struct aead_alg *alg = crypto_aead_alg(tfm); + + return container_of(alg, struct qce_alg_template, alg.aead); +} + +extern const struct qce_algo_ops aead_ops; + +#endif /* _AEAD_H_ */ diff --git a/drivers/crypto/qce/common.h b/drivers/crypto/qce/common.h index b135440bf72b..02e63ad9f245 100644 --- a/drivers/crypto/qce/common.h +++ b/drivers/crypto/qce/common.h @@ -11,6 +11,7 @@ #include #include #include +#include /* xts du size */ #define QCE_SECTOR_SIZE 512 @@ -88,6 +89,7 @@ struct qce_alg_template { union { struct skcipher_alg skcipher; struct ahash_alg ahash; + struct aead_alg aead; } alg; struct qce_device *qce; const u8 *hash_zero; diff --git a/drivers/crypto/qce/core.c b/drivers/crypto/qce/core.c index 80b75085c265..d3780be44a76 100644 --- a/drivers/crypto/qce/core.c +++ b/drivers/crypto/qce/core.c @@ -17,6 +17,7 @@ #include "core.h" #include "cipher.h" #include "sha.h" +#include "aead.h" #define QCE_MAJOR_VERSION5 0x05 #define QCE_QUEUE_LENGTH 1 @@ -28,6 +29,9 @@ static const struct qce_algo_ops *qce_ops[] = { #ifdef CONFIG_CRYPTO_DEV_QCE_SHA &ahash_ops, #endif +#ifdef CONFIG_CRYPTO_DEV_QCE_AEAD + &aead_ops, +#endif }; static void qce_unregister_algs(struct qce_device *qce)