From patchwork Thu Dec 22 16:15:14 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cyrille Pitchen X-Patchwork-Id: 9485273 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 48C9D600BA for ; Thu, 22 Dec 2016 16:18:42 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 36BAF27F89 for ; Thu, 22 Dec 2016 16:18:42 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 295012808C; Thu, 22 Dec 2016 16:18:42 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 1BC0A27F89 for ; Thu, 22 Dec 2016 16:18:41 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1cK63F-00066g-KX; Thu, 22 Dec 2016 16:17:05 +0000 Received: from smtpout.microchip.com ([198.175.253.82] helo=email.microchip.com) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1cK62E-0005OV-27 for linux-arm-kernel@lists.infradead.org; Thu, 22 Dec 2016 16:16:10 +0000 Received: from tenerife.corp.atmel.com (10.10.76.4) by chn-sv-exch07.mchp-main.com (10.10.76.108) with Microsoft SMTP Server id 14.3.181.6; Thu, 22 Dec 2016 09:15:56 -0700 From: Cyrille Pitchen To: , , Subject: [PATCH 09/12] crypto: atmel-sha: add support to hmac(shaX) Date: Thu, 22 Dec 2016 17:15:14 +0100 Message-ID: X-Mailer: git-send-email 2.7.4 In-Reply-To: References: MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAC+NgFupmVWLjYuHi8mHRtf0THWFwY/P8N7wWhxdOYbR48L6TxWLa9HfMFvc+bWO06JiyismBNYAhijUzLym/IoE14/U0i4JZSxkr7i55y9TAuLadsYuRi0NIYD2jxJepC9i6GDk52AQMJd4+OMoKYosIBEosbHkFVsQsMJ1R4sHqd+wgCWEBZ4nLp+4C2RwcLAKqEudfS4OEeQXiJQ7saAYrkRCQk7h5rpMZxOYUsJV4fPce2EwhARuJ/yvvskLUC0qcnPmEBcRmFpCQOPjiBTNEjRrQ3hXMEHMCJTa//MECYTtJPF93kw3CtpM4PP0i1C4Hia4Fv5lhap4+vghla0tsf7WPFcLWkdh2sB9qjq3EnhkTmSBsd4kHj5ZD2b4Ssx42QNVESbQt2cw2gVFiFpJTZyE5dQEj0ypGaWcPP93gMF3XCGcPA3O93OSMAt3cxMw8veT83E2MkIjK2cE4eZL/IUZJDiYlUd6tk86HC/El5adUZiQWZ8QXleakFh9ilODgURLh5V8GlOMtLkjMLc5Mh0nJcHAoSfA+XgqUEixKTU+tSMvMKUktgkifYpSUEuf9CJIUAOnLKM2Dy11iFJUS5o0CyfEUpBblZpZAxG8xCnM8ZBJiycvPS5UCOpEBCDQYXzGKczAqCfNKg9zAk5lXAnfCK6DrmICuW7f7NMh1JYkIKakGRl6eQ3ZOk1iS/uapiAsZSn049DlyP69cvYflpi9vnbINOXfes9nyyXrt/HwJoZIHCnmBC9eGRDQ+82mpEdDlPlT8q4LF8hOzqZBf/+TwmVtzVttzJ034Ufrxfuvm9fOmvOqy4lPaobajyO+61Yr9cnKHmf8t8X3+23RdmOmnPXeiODcW/2a9psRSnJFoqMVcVJwIAIReqZ8eAwAA X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20161222_081602_441311_CD3F0B2F X-CRM114-Status: GOOD ( 17.74 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Cyrille Pitchen , linux-crypto@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP This patch adds support to the hmac(shaX) algorithms. Signed-off-by: Cyrille Pitchen --- drivers/crypto/atmel-sha-regs.h | 4 + drivers/crypto/atmel-sha.c | 598 +++++++++++++++++++++++++++++++++++++++- 2 files changed, 601 insertions(+), 1 deletion(-) diff --git a/drivers/crypto/atmel-sha-regs.h b/drivers/crypto/atmel-sha-regs.h index 8d62d31eda08..1b9f3d33079e 100644 --- a/drivers/crypto/atmel-sha-regs.h +++ b/drivers/crypto/atmel-sha-regs.h @@ -26,6 +26,7 @@ #define SHA_MR_ALGO_SHA384 (2 << 8) #define SHA_MR_ALGO_SHA512 (3 << 8) #define SHA_MR_ALGO_SHA224 (4 << 8) +#define SHA_MR_HMAC (1 << 11) #define SHA_MR_DUALBUFF (1 << 16) #define SHA_IER 0x10 @@ -42,6 +43,9 @@ #define SHA_ISR_URAT_MR (0x2 << 12) #define SHA_ISR_URAT_WO (0x5 << 12) +#define SHA_MSR 0x20 +#define SHA_BCR 0x30 + #define SHA_HW_VERSION 0xFC #define SHA_TPR 0x108 diff --git a/drivers/crypto/atmel-sha.c b/drivers/crypto/atmel-sha.c index a4fc60b67099..78c3c02e4483 100644 --- a/drivers/crypto/atmel-sha.c +++ b/drivers/crypto/atmel-sha.c @@ -51,13 +51,20 @@ #define SHA_FLAGS_CPU BIT(5) #define SHA_FLAGS_DMA_READY BIT(6) -/* bits[10:8] are reserved. */ +/* bits[11:8] are reserved. */ #define SHA_FLAGS_ALGO_MASK SHA_MR_ALGO_MASK #define SHA_FLAGS_SHA1 SHA_MR_ALGO_SHA1 #define SHA_FLAGS_SHA256 SHA_MR_ALGO_SHA256 #define SHA_FLAGS_SHA384 SHA_MR_ALGO_SHA384 #define SHA_FLAGS_SHA512 SHA_MR_ALGO_SHA512 #define SHA_FLAGS_SHA224 SHA_MR_ALGO_SHA224 +#define SHA_FLAGS_HMAC SHA_MR_HMAC +#define SHA_FLAGS_HMAC_SHA1 (SHA_FLAGS_HMAC | SHA_FLAGS_SHA1) +#define SHA_FLAGS_HMAC_SHA256 (SHA_FLAGS_HMAC | SHA_FLAGS_SHA256) +#define SHA_FLAGS_HMAC_SHA384 (SHA_FLAGS_HMAC | SHA_FLAGS_SHA384) +#define SHA_FLAGS_HMAC_SHA512 (SHA_FLAGS_HMAC | SHA_FLAGS_SHA512) +#define SHA_FLAGS_HMAC_SHA224 (SHA_FLAGS_HMAC | SHA_FLAGS_SHA224) +#define SHA_FLAGS_MODE_MASK (SHA_FLAGS_HMAC | SHA_FLAGS_ALGO_MASK) #define SHA_FLAGS_FINUP BIT(16) #define SHA_FLAGS_SG BIT(17) @@ -67,8 +74,10 @@ #define SHA_FLAGS_IDATAR0 BIT(26) #define SHA_FLAGS_WAIT_DATARDY BIT(27) +#define SHA_OP_INIT 0 #define SHA_OP_UPDATE 1 #define SHA_OP_FINAL 2 +#define SHA_OP_DIGEST 3 #define SHA_BUFFER_LEN (PAGE_SIZE / 16) @@ -80,6 +89,7 @@ struct atmel_sha_caps { bool has_sha224; bool has_sha_384_512; bool has_uihv; + bool has_hmac; }; struct atmel_sha_dev; @@ -105,6 +115,7 @@ struct atmel_sha_reqctx { unsigned int total; /* total request */ size_t block_size; + size_t hash_size; u8 buffer[SHA_BUFFER_LEN + SHA512_BLOCK_SIZE] __aligned(sizeof(u32)); }; @@ -152,6 +163,8 @@ struct atmel_sha_dev { struct atmel_sha_caps caps; + struct scatterlist tmp; + u32 hw_version; }; @@ -1522,11 +1535,579 @@ static int atmel_sha_cpu_start(struct atmel_sha_dev *dd, return atmel_sha_cpu_transfer(dd); } +static int atmel_sha_cpu_hash(struct atmel_sha_dev *dd, + const void *data, unsigned int datalen, + bool auto_padding, + atmel_sha_fn_t resume) +{ + struct ahash_request *req = dd->req; + struct atmel_sha_reqctx *ctx = ahash_request_ctx(req); + u32 msglen = (auto_padding) ? datalen : 0; + u32 mr = SHA_MR_MODE_AUTO; + + if (!(IS_ALIGNED(datalen, ctx->block_size) || auto_padding)) + return atmel_sha_complete(dd, -EINVAL); + + mr |= (ctx->flags & SHA_FLAGS_ALGO_MASK); + atmel_sha_write(dd, SHA_MR, mr); + atmel_sha_write(dd, SHA_MSR, msglen); + atmel_sha_write(dd, SHA_BCR, msglen); + atmel_sha_write(dd, SHA_CR, SHA_CR_FIRST); + + sg_init_one(&dd->tmp, data, datalen); + return atmel_sha_cpu_start(dd, &dd->tmp, datalen, false, true, resume); +} + + +/* hmac functions */ + +struct atmel_sha_hmac_key { + bool valid; + unsigned int keylen; + u8 buffer[SHA512_BLOCK_SIZE]; + u8 *keydup; +}; + +static inline void atmel_sha_hmac_key_init(struct atmel_sha_hmac_key *hkey) +{ + memset(hkey, 0, sizeof(*hkey)); +} + +static inline void atmel_sha_hmac_key_release(struct atmel_sha_hmac_key *hkey) +{ + kfree(hkey->keydup); + memset(hkey, 0, sizeof(*hkey)); +} + +static inline int atmel_sha_hmac_key_set(struct atmel_sha_hmac_key *hkey, + const u8 *key, + unsigned int keylen) +{ + atmel_sha_hmac_key_release(hkey); + + if (keylen > sizeof(hkey->buffer)) { + hkey->keydup = kmemdup(key, keylen, GFP_KERNEL); + if (!hkey->keydup) + return -ENOMEM; + + } else { + memcpy(hkey->buffer, key, keylen); + } + + hkey->valid = true; + hkey->keylen = keylen; + return 0; +} + +static inline bool atmel_sha_hmac_key_get(const struct atmel_sha_hmac_key *hkey, + const u8 **key, + unsigned int *keylen) +{ + if (!hkey->valid) + return false; + + *keylen = hkey->keylen; + *key = (hkey->keydup) ? hkey->keydup : hkey->buffer; + return true; +} + + +struct atmel_sha_hmac_ctx { + struct atmel_sha_ctx base; + + struct atmel_sha_hmac_key hkey; + u32 ipad[SHA512_BLOCK_SIZE / sizeof(u32)]; + u32 opad[SHA512_BLOCK_SIZE / sizeof(u32)]; + atmel_sha_fn_t resume; +}; + +static int atmel_sha_hmac_setup(struct atmel_sha_dev *dd, + atmel_sha_fn_t resume); +static int atmel_sha_hmac_prehash_key(struct atmel_sha_dev *dd, + const u8 *key, unsigned int keylen); +static int atmel_sha_hmac_prehash_key_done(struct atmel_sha_dev *dd); +static int atmel_sha_hmac_compute_ipad_hash(struct atmel_sha_dev *dd); +static int atmel_sha_hmac_compute_opad_hash(struct atmel_sha_dev *dd); +static int atmel_sha_hmac_setup_done(struct atmel_sha_dev *dd); + +static int atmel_sha_hmac_init_done(struct atmel_sha_dev *dd); +static int atmel_sha_hmac_final(struct atmel_sha_dev *dd); +static int atmel_sha_hmac_final_done(struct atmel_sha_dev *dd); +static int atmel_sha_hmac_digest2(struct atmel_sha_dev *dd); + +static int atmel_sha_hmac_setup(struct atmel_sha_dev *dd, + atmel_sha_fn_t resume) +{ + struct ahash_request *req = dd->req; + struct atmel_sha_reqctx *ctx = ahash_request_ctx(req); + struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); + struct atmel_sha_hmac_ctx *hmac = crypto_ahash_ctx(tfm); + unsigned int keylen; + const u8 *key; + size_t bs; + + hmac->resume = resume; + switch (ctx->flags & SHA_FLAGS_ALGO_MASK) { + case SHA_FLAGS_SHA1: + ctx->block_size = SHA1_BLOCK_SIZE; + ctx->hash_size = SHA1_DIGEST_SIZE; + break; + + case SHA_FLAGS_SHA224: + ctx->block_size = SHA224_BLOCK_SIZE; + ctx->hash_size = SHA256_DIGEST_SIZE; + break; + + case SHA_FLAGS_SHA256: + ctx->block_size = SHA256_BLOCK_SIZE; + ctx->hash_size = SHA256_DIGEST_SIZE; + break; + + case SHA_FLAGS_SHA384: + ctx->block_size = SHA384_BLOCK_SIZE; + ctx->hash_size = SHA512_DIGEST_SIZE; + break; + + case SHA_FLAGS_SHA512: + ctx->block_size = SHA512_BLOCK_SIZE; + ctx->hash_size = SHA512_DIGEST_SIZE; + break; + + default: + return atmel_sha_complete(dd, -EINVAL); + } + bs = ctx->block_size; + + if (likely(!atmel_sha_hmac_key_get(&hmac->hkey, &key, &keylen))) + return resume(dd); + + /* Compute K' from K. */ + if (unlikely(keylen > bs)) + return atmel_sha_hmac_prehash_key(dd, key, keylen); + + /* Prepare ipad. */ + memcpy((u8 *)hmac->ipad, key, keylen); + memset((u8 *)hmac->ipad + keylen, 0, bs - keylen); + return atmel_sha_hmac_compute_ipad_hash(dd); +} + +static int atmel_sha_hmac_prehash_key(struct atmel_sha_dev *dd, + const u8 *key, unsigned int keylen) +{ + return atmel_sha_cpu_hash(dd, key, keylen, true, + atmel_sha_hmac_prehash_key_done); +} + +static int atmel_sha_hmac_prehash_key_done(struct atmel_sha_dev *dd) +{ + struct ahash_request *req = dd->req; + struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); + struct atmel_sha_hmac_ctx *hmac = crypto_ahash_ctx(tfm); + struct atmel_sha_reqctx *ctx = ahash_request_ctx(req); + size_t ds = crypto_ahash_digestsize(tfm); + size_t bs = ctx->block_size; + size_t i, num_words = ds / sizeof(u32); + + /* Prepare ipad. */ + for (i = 0; i < num_words; ++i) + hmac->ipad[i] = atmel_sha_read(dd, SHA_REG_DIGEST(i)); + memset((u8 *)hmac->ipad + ds, 0, bs - ds); + return atmel_sha_hmac_compute_ipad_hash(dd); +} + +static int atmel_sha_hmac_compute_ipad_hash(struct atmel_sha_dev *dd) +{ + struct ahash_request *req = dd->req; + struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); + struct atmel_sha_hmac_ctx *hmac = crypto_ahash_ctx(tfm); + struct atmel_sha_reqctx *ctx = ahash_request_ctx(req); + size_t bs = ctx->block_size; + size_t i, num_words = bs / sizeof(u32); + + memcpy(hmac->opad, hmac->ipad, bs); + for (i = 0; i < num_words; ++i) { + hmac->ipad[i] ^= 0x36363636; + hmac->opad[i] ^= 0x5c5c5c5c; + } + + return atmel_sha_cpu_hash(dd, hmac->ipad, bs, false, + atmel_sha_hmac_compute_opad_hash); +} + +static int atmel_sha_hmac_compute_opad_hash(struct atmel_sha_dev *dd) +{ + struct ahash_request *req = dd->req; + struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); + struct atmel_sha_hmac_ctx *hmac = crypto_ahash_ctx(tfm); + struct atmel_sha_reqctx *ctx = ahash_request_ctx(req); + size_t bs = ctx->block_size; + size_t hs = ctx->hash_size; + size_t i, num_words = hs / sizeof(u32); + + for (i = 0; i < num_words; ++i) + hmac->ipad[i] = atmel_sha_read(dd, SHA_REG_DIGEST(i)); + return atmel_sha_cpu_hash(dd, hmac->opad, bs, false, + atmel_sha_hmac_setup_done); +} + +static int atmel_sha_hmac_setup_done(struct atmel_sha_dev *dd) +{ + struct ahash_request *req = dd->req; + struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); + struct atmel_sha_hmac_ctx *hmac = crypto_ahash_ctx(tfm); + struct atmel_sha_reqctx *ctx = ahash_request_ctx(req); + size_t hs = ctx->hash_size; + size_t i, num_words = hs / sizeof(u32); + + for (i = 0; i < num_words; ++i) + hmac->opad[i] = atmel_sha_read(dd, SHA_REG_DIGEST(i)); + atmel_sha_hmac_key_release(&hmac->hkey); + return hmac->resume(dd); +} + +static int atmel_sha_hmac_start(struct atmel_sha_dev *dd) +{ + struct ahash_request *req = dd->req; + struct atmel_sha_reqctx *ctx = ahash_request_ctx(req); + int err; + + err = atmel_sha_hw_init(dd); + if (err) + return atmel_sha_complete(dd, err); + + switch (ctx->op) { + case SHA_OP_INIT: + err = atmel_sha_hmac_setup(dd, atmel_sha_hmac_init_done); + break; + + case SHA_OP_UPDATE: + dd->resume = atmel_sha_done; + err = atmel_sha_update_req(dd); + break; + + case SHA_OP_FINAL: + dd->resume = atmel_sha_hmac_final; + err = atmel_sha_final_req(dd); + break; + + case SHA_OP_DIGEST: + err = atmel_sha_hmac_setup(dd, atmel_sha_hmac_digest2); + break; + + default: + return atmel_sha_complete(dd, -EINVAL); + } + + return err; +} + +static int atmel_sha_hmac_setkey(struct crypto_ahash *tfm, const u8 *key, + unsigned int keylen) +{ + struct atmel_sha_hmac_ctx *hmac = crypto_ahash_ctx(tfm); + + if (atmel_sha_hmac_key_set(&hmac->hkey, key, keylen)) { + crypto_ahash_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN); + return -EINVAL; + } + + return 0; +} + +static int atmel_sha_hmac_init(struct ahash_request *req) +{ + int err; + + err = atmel_sha_init(req); + if (err) + return err; + + return atmel_sha_enqueue(req, SHA_OP_INIT); +} + +static int atmel_sha_hmac_init_done(struct atmel_sha_dev *dd) +{ + struct ahash_request *req = dd->req; + struct atmel_sha_reqctx *ctx = ahash_request_ctx(req); + struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); + struct atmel_sha_hmac_ctx *hmac = crypto_ahash_ctx(tfm); + size_t bs = ctx->block_size; + size_t hs = ctx->hash_size; + + ctx->bufcnt = 0; + ctx->digcnt[0] = bs; + ctx->digcnt[1] = 0; + ctx->flags |= SHA_FLAGS_RESTORE; + memcpy(ctx->digest, hmac->ipad, hs); + return atmel_sha_complete(dd, 0); +} + +static int atmel_sha_hmac_final(struct atmel_sha_dev *dd) +{ + struct ahash_request *req = dd->req; + struct atmel_sha_reqctx *ctx = ahash_request_ctx(req); + struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); + struct atmel_sha_hmac_ctx *hmac = crypto_ahash_ctx(tfm); + u32 *digest = (u32 *)ctx->digest; + size_t ds = crypto_ahash_digestsize(tfm); + size_t bs = ctx->block_size; + size_t hs = ctx->hash_size; + size_t i, num_words; + u32 mr; + + /* Save d = SHA((K' + ipad) | msg). */ + num_words = ds / sizeof(u32); + for (i = 0; i < num_words; ++i) + digest[i] = atmel_sha_read(dd, SHA_REG_DIGEST(i)); + + /* Restore context to finish computing SHA((K' + opad) | d). */ + atmel_sha_write(dd, SHA_CR, SHA_CR_WUIHV); + num_words = hs / sizeof(u32); + for (i = 0; i < num_words; ++i) + atmel_sha_write(dd, SHA_REG_DIN(i), hmac->opad[i]); + + mr = SHA_MR_MODE_AUTO | SHA_MR_UIHV; + mr |= (ctx->flags & SHA_FLAGS_ALGO_MASK); + atmel_sha_write(dd, SHA_MR, mr); + atmel_sha_write(dd, SHA_MSR, bs + ds); + atmel_sha_write(dd, SHA_BCR, ds); + atmel_sha_write(dd, SHA_CR, SHA_CR_FIRST); + + sg_init_one(&dd->tmp, digest, ds); + return atmel_sha_cpu_start(dd, &dd->tmp, ds, false, true, + atmel_sha_hmac_final_done); +} + +static int atmel_sha_hmac_final_done(struct atmel_sha_dev *dd) +{ + /* + * req->result might not be sizeof(u32) aligned, so copy the + * digest into ctx->digest[] before memcpy() the data into + * req->result. + */ + atmel_sha_copy_hash(dd->req); + atmel_sha_copy_ready_hash(dd->req); + return atmel_sha_complete(dd, 0); +} + +static int atmel_sha_hmac_digest(struct ahash_request *req) +{ + int err; + + err = atmel_sha_init(req); + if (err) + return err; + + return atmel_sha_enqueue(req, SHA_OP_DIGEST); +} + +static int atmel_sha_hmac_digest2(struct atmel_sha_dev *dd) +{ + struct ahash_request *req = dd->req; + struct atmel_sha_reqctx *ctx = ahash_request_ctx(req); + struct crypto_ahash *tfm = crypto_ahash_reqtfm(req); + struct atmel_sha_hmac_ctx *hmac = crypto_ahash_ctx(tfm); + size_t hs = ctx->hash_size; + size_t i, num_words = hs / sizeof(u32); + bool use_dma = false; + u32 mr; + + /* Special case for empty message. */ + if (!req->nbytes) + return atmel_sha_complete(dd, -EINVAL); // TODO: + + /* Check DMA threshold and alignment. */ + if (req->nbytes > ATMEL_SHA_DMA_THRESHOLD && + atmel_sha_dma_check_aligned(dd, req->src, req->nbytes)) + use_dma = true; + + /* Write both initial hash values to compute a HMAC. */ + atmel_sha_write(dd, SHA_CR, SHA_CR_WUIHV); + for (i = 0; i < num_words; ++i) + atmel_sha_write(dd, SHA_REG_DIN(i), hmac->ipad[i]); + + atmel_sha_write(dd, SHA_CR, SHA_CR_WUIEHV); + for (i = 0; i < num_words; ++i) + atmel_sha_write(dd, SHA_REG_DIN(i), hmac->opad[i]); + + /* Write the Mode, Message Size, Bytes Count then Control Registers. */ + mr = (SHA_MR_HMAC | SHA_MR_DUALBUFF); + mr |= ctx->flags & SHA_FLAGS_ALGO_MASK; + if (use_dma) + mr |= SHA_MR_MODE_IDATAR0; + else + mr |= SHA_MR_MODE_AUTO; + atmel_sha_write(dd, SHA_MR, mr); + + atmel_sha_write(dd, SHA_MSR, req->nbytes); + atmel_sha_write(dd, SHA_BCR, req->nbytes); + + atmel_sha_write(dd, SHA_CR, SHA_CR_FIRST); + + /* Process data. */ + if (use_dma) + return atmel_sha_dma_start(dd, req->src, req->nbytes, + atmel_sha_hmac_final_done); + + return atmel_sha_cpu_start(dd, req->src, req->nbytes, false, true, + atmel_sha_hmac_final_done); +} + +static int atmel_sha_hmac_cra_init(struct crypto_tfm *tfm) +{ + struct atmel_sha_hmac_ctx *hmac = crypto_tfm_ctx(tfm); + + crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm), + sizeof(struct atmel_sha_reqctx)); + hmac->base.start = atmel_sha_hmac_start; + atmel_sha_hmac_key_init(&hmac->hkey); + + return 0; +} + +static void atmel_sha_hmac_cra_exit(struct crypto_tfm *tfm) +{ + struct atmel_sha_hmac_ctx *hmac = crypto_tfm_ctx(tfm); + + atmel_sha_hmac_key_release(&hmac->hkey); +} + +static struct ahash_alg sha_hmac_algs[] = { +{ + .init = atmel_sha_hmac_init, + .update = atmel_sha_update, + .final = atmel_sha_final, + .digest = atmel_sha_hmac_digest, + .setkey = atmel_sha_hmac_setkey, + .export = atmel_sha_export, + .import = atmel_sha_import, + .halg = { + .digestsize = SHA1_DIGEST_SIZE, + .statesize = sizeof(struct atmel_sha_reqctx), + .base = { + .cra_name = "hmac(sha1)", + .cra_driver_name = "atmel-hmac-sha1", + .cra_priority = 100, + .cra_flags = CRYPTO_ALG_ASYNC, + .cra_blocksize = SHA1_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct atmel_sha_hmac_ctx), + .cra_alignmask = 0, + .cra_module = THIS_MODULE, + .cra_init = atmel_sha_hmac_cra_init, + .cra_exit = atmel_sha_hmac_cra_exit, + } + } +}, +{ + .init = atmel_sha_hmac_init, + .update = atmel_sha_update, + .final = atmel_sha_final, + .digest = atmel_sha_hmac_digest, + .setkey = atmel_sha_hmac_setkey, + .export = atmel_sha_export, + .import = atmel_sha_import, + .halg = { + .digestsize = SHA224_DIGEST_SIZE, + .statesize = sizeof(struct atmel_sha_reqctx), + .base = { + .cra_name = "hmac(sha224)", + .cra_driver_name = "atmel-hmac-sha224", + .cra_priority = 100, + .cra_flags = CRYPTO_ALG_ASYNC, + .cra_blocksize = SHA224_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct atmel_sha_hmac_ctx), + .cra_alignmask = 0, + .cra_module = THIS_MODULE, + .cra_init = atmel_sha_hmac_cra_init, + .cra_exit = atmel_sha_hmac_cra_exit, + } + } +}, +{ + .init = atmel_sha_hmac_init, + .update = atmel_sha_update, + .final = atmel_sha_final, + .digest = atmel_sha_hmac_digest, + .setkey = atmel_sha_hmac_setkey, + .export = atmel_sha_export, + .import = atmel_sha_import, + .halg = { + .digestsize = SHA256_DIGEST_SIZE, + .statesize = sizeof(struct atmel_sha_reqctx), + .base = { + .cra_name = "hmac(sha256)", + .cra_driver_name = "atmel-hmac-sha256", + .cra_priority = 100, + .cra_flags = CRYPTO_ALG_ASYNC, + .cra_blocksize = SHA256_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct atmel_sha_hmac_ctx), + .cra_alignmask = 0, + .cra_module = THIS_MODULE, + .cra_init = atmel_sha_hmac_cra_init, + .cra_exit = atmel_sha_hmac_cra_exit, + } + } +}, +{ + .init = atmel_sha_hmac_init, + .update = atmel_sha_update, + .final = atmel_sha_final, + .digest = atmel_sha_hmac_digest, + .setkey = atmel_sha_hmac_setkey, + .export = atmel_sha_export, + .import = atmel_sha_import, + .halg = { + .digestsize = SHA384_DIGEST_SIZE, + .statesize = sizeof(struct atmel_sha_reqctx), + .base = { + .cra_name = "hmac(sha384)", + .cra_driver_name = "atmel-hmac-sha384", + .cra_priority = 100, + .cra_flags = CRYPTO_ALG_ASYNC, + .cra_blocksize = SHA384_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct atmel_sha_hmac_ctx), + .cra_alignmask = 0, + .cra_module = THIS_MODULE, + .cra_init = atmel_sha_hmac_cra_init, + .cra_exit = atmel_sha_hmac_cra_exit, + } + } +}, +{ + .init = atmel_sha_hmac_init, + .update = atmel_sha_update, + .final = atmel_sha_final, + .digest = atmel_sha_hmac_digest, + .setkey = atmel_sha_hmac_setkey, + .export = atmel_sha_export, + .import = atmel_sha_import, + .halg = { + .digestsize = SHA512_DIGEST_SIZE, + .statesize = sizeof(struct atmel_sha_reqctx), + .base = { + .cra_name = "hmac(sha512)", + .cra_driver_name = "atmel-hmac-sha512", + .cra_priority = 100, + .cra_flags = CRYPTO_ALG_ASYNC, + .cra_blocksize = SHA512_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct atmel_sha_hmac_ctx), + .cra_alignmask = 0, + .cra_module = THIS_MODULE, + .cra_init = atmel_sha_hmac_cra_init, + .cra_exit = atmel_sha_hmac_cra_exit, + } + } +}, +}; static void atmel_sha_unregister_algs(struct atmel_sha_dev *dd) { int i; + if (dd->caps.has_hmac) + for (i = 0; i < ARRAY_SIZE(sha_hmac_algs); i++) + crypto_unregister_ahash(&sha_hmac_algs[i]); + for (i = 0; i < ARRAY_SIZE(sha_1_256_algs); i++) crypto_unregister_ahash(&sha_1_256_algs[i]); @@ -1563,8 +2144,21 @@ static int atmel_sha_register_algs(struct atmel_sha_dev *dd) } } + if (dd->caps.has_hmac) { + for (i = 0; i < ARRAY_SIZE(sha_hmac_algs); i++) { + err = crypto_register_ahash(&sha_hmac_algs[i]); + if (err) + goto err_sha_hmac_algs; + } + } + return 0; + /*i = ARRAY_SIZE(sha_hmac_algs);*/ +err_sha_hmac_algs: + for (j = 0; j < i; j++) + crypto_unregister_ahash(&sha_hmac_algs[j]); + i = ARRAY_SIZE(sha_384_512_algs); err_sha_384_512_algs: for (j = 0; j < i; j++) crypto_unregister_ahash(&sha_384_512_algs[j]); @@ -1634,6 +2228,7 @@ static void atmel_sha_get_cap(struct atmel_sha_dev *dd) dd->caps.has_sha224 = 0; dd->caps.has_sha_384_512 = 0; dd->caps.has_uihv = 0; + dd->caps.has_hmac = 0; /* keep only major version number */ switch (dd->hw_version & 0xff0) { @@ -1643,6 +2238,7 @@ static void atmel_sha_get_cap(struct atmel_sha_dev *dd) dd->caps.has_sha224 = 1; dd->caps.has_sha_384_512 = 1; dd->caps.has_uihv = 1; + dd->caps.has_hmac = 1; break; case 0x420: dd->caps.has_dma = 1;