From patchwork Tue Jun 7 14:24:43 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tudor Ambarus X-Patchwork-Id: 9161543 X-Patchwork-Delegate: herbert@gondor.apana.org.au 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 2B3D960467 for ; Tue, 7 Jun 2016 14:25:03 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 19CD025404 for ; Tue, 7 Jun 2016 14:25:03 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0E5092793B; Tue, 7 Jun 2016 14:25:03 +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=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6CDA025D91 for ; Tue, 7 Jun 2016 14:25:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755158AbcFGOZA (ORCPT ); Tue, 7 Jun 2016 10:25:00 -0400 Received: from mail-bn1bon0060.outbound.protection.outlook.com ([157.56.111.60]:52076 "EHLO na01-bn1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1755211AbcFGOY7 (ORCPT ); Tue, 7 Jun 2016 10:24:59 -0400 Received: from BN3PR0301CA0075.namprd03.prod.outlook.com (10.160.152.171) by SN1PR0301MB1632.namprd03.prod.outlook.com (10.162.130.30) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.511.8; Tue, 7 Jun 2016 14:24:55 +0000 Received: from BL2FFO11OLC011.protection.gbl (2a01:111:f400:7c09::178) by BN3PR0301CA0075.outlook.office365.com (2a01:111:e400:401e::43) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.511.8 via Frontend Transport; Tue, 7 Jun 2016 14:24:56 +0000 Authentication-Results: spf=fail (sender IP is 192.88.158.2) smtp.mailfrom=nxp.com; nxp.com; dkim=none (message not signed) header.d=none; nxp.com; dmarc=none action=none header.from=nxp.com; nxp.com; dkim=none (message not signed) header.d=none; Received-SPF: Fail (protection.outlook.com: domain of nxp.com does not designate 192.88.158.2 as permitted sender) receiver=protection.outlook.com; client-ip=192.88.158.2; helo=az84smr01.freescale.net; Received: from az84smr01.freescale.net (192.88.158.2) by BL2FFO11OLC011.mail.protection.outlook.com (10.173.160.157) with Microsoft SMTP Server (TLS) id 15.1.497.8 via Frontend Transport; Tue, 7 Jun 2016 14:24:55 +0000 Received: from enigma.ea.freescale.net (enigma.ea.freescale.net [10.171.77.120]) by az84smr01.freescale.net (8.14.3/8.14.0) with ESMTP id u57EOmen003691; Tue, 7 Jun 2016 07:24:53 -0700 From: Tudor Ambarus To: CC: , , Tudor Ambarus Subject: [PATCH 3/3] crypto: caam - add support for RSA algorithm Date: Tue, 7 Jun 2016 17:24:43 +0300 Message-ID: <1465309483-2703-4-git-send-email-tudor-dan.ambarus@nxp.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1465309483-2703-1-git-send-email-tudor-dan.ambarus@nxp.com> References: <1465309483-2703-1-git-send-email-tudor-dan.ambarus@nxp.com> X-EOPAttributedMessage: 0 X-Matching-Connectors: 131097830961265072; (91ab9b29-cfa4-454e-5278-08d120cd25b8); () X-Forefront-Antispam-Report: CIP:192.88.158.2; IPV:NLI; CTRY:US; EFV:NLI; SFV:NSPM; SFS:(10009020)(6009001)(2980300002)(1110001)(1109001)(339900001)(199003)(189002)(2950100001)(87936001)(81156014)(5008740100001)(81166006)(47776003)(6806005)(104016004)(8936002)(86362001)(105606002)(575784001)(8666004)(50986999)(77096005)(106466001)(8676002)(2351001)(48376002)(19580405001)(50226002)(33646002)(229853001)(19580395003)(36756003)(85426001)(4326007)(92566002)(5003940100001)(68736007)(69596002)(50466002)(97736004)(2906002)(110136002)(586003)(189998001)(76176999)(7059030)(4720700001); DIR:OUT; SFP:1101; SCL:1; SRVR:SN1PR0301MB1632; H:az84smr01.freescale.net; FPR:; SPF:Fail; PTR:InfoDomainNonexistent; A:1; MX:1; LANG:en; X-Microsoft-Exchange-Diagnostics: 1; BL2FFO11OLC011; 1: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 MIME-Version: 1.0 X-MS-Office365-Filtering-Correlation-Id: 4bbc1252-64ee-4480-d852-08d38edf7fb9 X-Microsoft-Exchange-Diagnostics: 1; SN1PR0301MB1632; 2:La2w5wphd5cXLnyhIJeMNTOD4sgpR8nanRIZ0g4cjerV+qK8RAH3XxUpYcEFnR6MtPxgu0T1KUEmroc2w4l5xtGGFvoiy0x+VRLrzklcrgj7VS9L3jCGiKioL7NgsR1UtK0TLcuef/a1VDw2KRe8tQUpMiauDzh/7ssjYHqOqlYxbBbUhWhsAO19/cvXOovJ; 3:ofLLHh7AAlDCkpMqSbfRnh45NunEQaGe+0bbN4664uzrWZe/A6x/pLoI0/q5F1gynoEyXy83qbYdqLKe6bMkWgeTJmiF0rhTMpxEc19glm8Q8qxu6ydepy75wN/nP1je7wnMABPemkPfscTix+OPScN/mrSW/ngdrJ1BsXLnFtGU/F8Uc9/Hq0IDyW0fC5koV5s+G+oh7+vGUuVXWWnZ9nFQsK1Os/gr0uySLW+MEVw=; 25:wzMyNHRVpUVrK+bveP4p6NpBBrCEJ7e/j1bbnsScM/AY9jMOW5X/ym4rPr5ULPahTOONoxqzbAIxlZtWqdvsfrpBojSHqlxUuZ1YVl82YGcxclSOYmzpBRYmQJGwlOO2wCrnVR62wmG+J6DmVqRTOmXE+zyfnTb9SmcnGoPUHOdEMCkiuk5jib330uUM7h7syeuSnSKbBfOPF+qu6i0vY7k78kV23VLUHRHwKmZv7Bd/T5RnZVe0W7jXIpkaDQW3F8n7omRdP7U6fNOKH6FdCGkKywQKFY/kxeZV58cRH9laeLJixsG0gE4ATUJq8jQedH4icWlWvDK7b+1XhNEs8yckR5gQjw4t0YbH8+TStiPnPQUndT6n/mysWrKM145mkT2lsJiv4GYIUzwMm7TcXHikBxuTmZ7FxGbD47Kkx9M= X-Microsoft-Antispam: UriScan:;BCL:0;PCL:0;RULEID:;SRVR:SN1PR0301MB1632; X-Microsoft-Antispam-PRVS: X-Exchange-Antispam-Report-Test: UriScan:(185117386973197)(101931422205132); X-Exchange-Antispam-Report-CFA-Test: BCL:0; PCL:0; RULEID:(601004)(2401047)(13015025)(8121501046)(13024025)(5005006)(13023025)(13018025)(13017025)(10201501046)(3002001)(6055026); SRVR:SN1PR0301MB1632; BCL:0; PCL:0; RULEID:(400006); SRVR:SN1PR0301MB1632; X-Microsoft-Exchange-Diagnostics: 1; SN1PR0301MB1632; 4: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 X-Forefront-PRVS: 09669DB681 X-Microsoft-Exchange-Diagnostics: =?us-ascii?Q?1; SN1PR0301MB1632; 23:6N2aXy796DiE2jpkoYBvFp9HwrN12/6SmfYTEIz?= =?us-ascii?Q?t24/JNZV7/FXMMZrNYbA3QtHNQfgTqqWFq82XxG5R/DkE55Lug1x9kXe+hk4?= =?us-ascii?Q?4ed9EDDjgiSy24ygK0rU01qA7JdArPA0J5qjdzabdWcbukf226Lr9X7vkoCC?= =?us-ascii?Q?36ZZwnz52dDLhKznFUF2aoqCpkEGIilhIIxxfTGUesay4+fa0aFvNbSeC+OE?= =?us-ascii?Q?MEQqfmZfvBHSND7RIB8yN3gfNkKWAYL8O4VG4M56w67wad7wxwBhfkKvZkKc?= =?us-ascii?Q?FmXLyCNbP5/Hs1IsxPdMt8FxLin+30hpMSEpvK6oWkTsaPkmCVn+XCFizbl9?= =?us-ascii?Q?H9PpPMqBQdKdN5LlbzA0QB0NuvnQsDuD+/HuohKgsOnIJ4HkrVRov42IG4hw?= =?us-ascii?Q?TbBqUDhmIvWEpghFh9SzBJGApFo3RKbYbqt8IfJXtl+WTQRK98DzFLsCWXfw?= =?us-ascii?Q?YA07gtIz7cqptpubA2FfrAzDnN+IZseglcIurpaVH1A+1dBM4WdMYktsWfJN?= =?us-ascii?Q?j5SynIZ57as7+UnaC/xaar/StYNOKuVdukoK5wsoVap8GNq5agYZk+U3vD65?= =?us-ascii?Q?jOpk3DDRG+zQLJly3XLfGz6CgK6i0QjmIJ9urzsFWBmfh3j6uyrp6NCc6rKM?= =?us-ascii?Q?7TTsgkrVRVsCoQt23WagpBpTmhkHKTx0DSh5BVVW7UY+himIl1bqiuQP+3Y2?= =?us-ascii?Q?tj/tFI0Dz/KPN9oTafRRokLnExB/5salQul5I9ua5dlpGtRQnyHf3PNfMkwp?= =?us-ascii?Q?ck6l362FWSe6V4ZwyBvPaV4vptlnG7DkHxH6I0uGyP4Yo4u10WasjIJNJB2d?= =?us-ascii?Q?y0SeEImnyap48i0+yP6e0j+VP4lsj6876Aik5Yk1gUSoGf015yhDOKfIno8t?= =?us-ascii?Q?Uf1369aknbL0nF2zixRSq+NY9fvd1+6sw7UR3Ju1YmxuAz4E83H9N3vPfYtY?= =?us-ascii?Q?2nhVPgAGNWJS938zidLm3FsgxquzLTPIbffxCJHZg9sdj+SNofRlwsSS2oNN?= =?us-ascii?Q?rARKOaXrHGd5fjnqTSiGL/mNJ1UB18vYih07bPEY2QIStk+Rh60xJyRbJhB9?= =?us-ascii?Q?DbtUXhQD1k4Pxr80NwG1YeVju7C56KNHe5MrysRxJZn9dlolBEJbyusZ5Ez8?= =?us-ascii?Q?dyh8HzD6sXLw+rR0pNo0WxnahOPSHy6jPPKnoW7PIiDu3w2TzEKtn0l1Atdb?= =?us-ascii?Q?3morKfKYJNzK1YKQ=3D?= X-Microsoft-Exchange-Diagnostics: 1; SN1PR0301MB1632; 5:M7WlKqMV4tI1Gskrpb7VzhSGNpMPQHCcv9lql1NbGVFu7egs0hAqFO6xguQCUUlJHs5J41YZiFWjSjzVE1fjwZ6Yy2NA+vysu30g2GlquKF1Um3WHgjMecu6b+jsaw1PgyPFnTyYRZ8W2KPGFaS0ps9cz5O1PUVv4GeMCMg4zAc=; 24:I+mhr9fb2MYRZLHuEUCs2RA5OZPv1igmvC0Hyo3oNC6mq5wNlRVhwfbXujccYL9UgFA0GDX6FkmslwcEZOZwbcTlh0taIv0BZQ6qw61oDJA=; 7:gWxXsrfqET0OV2cl6gSAESeM8MI6YX0OAh4gB4M97mmLYgRXyd/64zySvRuSaOIRfq5Zxa0yk+C7ZeODbJu7z3VM9GG0oemXPRXRb5ezMF/tWBXNnVvwZ9M9r7YnPAg4CTjfGSYU/sOdstj1ch7OO/AcTwJAfe5pjEEPeGUFAfZLWB/lZptTIps0wXtnHDiZKXXFGrI8n6DvH6ukpbUjEy4oVFX0lSusqj2v/0SUklQ= SpamDiagnosticOutput: 1:99 SpamDiagnosticMetadata: NSPM X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 Jun 2016 14:24:55.9081 (UTC) X-MS-Exchange-CrossTenant-Id: 5afe0b00-7697-4969-b663-5eab37d5f47e X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=5afe0b00-7697-4969-b663-5eab37d5f47e; Ip=[192.88.158.2]; Helo=[az84smr01.freescale.net] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN1PR0301MB1632 Sender: linux-crypto-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add RSA support to caam driver. Coauthored-by: Yashpal Dutta Signed-off-by: Tudor Ambarus --- drivers/crypto/caam/Kconfig | 12 + drivers/crypto/caam/Makefile | 4 + drivers/crypto/caam/caampkc.c | 637 ++++++++++++++++++++++++++++++++++++++ drivers/crypto/caam/caampkc.h | 72 +++++ drivers/crypto/caam/compat.h | 3 + drivers/crypto/caam/desc.h | 2 + drivers/crypto/caam/desc_constr.h | 7 + drivers/crypto/caam/pdb.h | 51 ++- drivers/crypto/caam/pkc_desc.c | 36 +++ 9 files changed, 823 insertions(+), 1 deletion(-) create mode 100644 drivers/crypto/caam/caampkc.c create mode 100644 drivers/crypto/caam/caampkc.h create mode 100644 drivers/crypto/caam/pkc_desc.c diff --git a/drivers/crypto/caam/Kconfig b/drivers/crypto/caam/Kconfig index 5652a53..44449ba 100644 --- a/drivers/crypto/caam/Kconfig +++ b/drivers/crypto/caam/Kconfig @@ -99,6 +99,18 @@ config CRYPTO_DEV_FSL_CAAM_AHASH_API To compile this as a module, choose M here: the module will be called caamhash. +config CRYPTO_DEV_FSL_CAAM_PKC_API + tristate "Register public key cryptography implementations with Crypto API" + depends on CRYPTO_DEV_FSL_CAAM && CRYPTO_DEV_FSL_CAAM_JR + default y + select CRYPTO_RSA + help + Selecting this will allow SEC Public key support for RSA. + Supported cryptographic primitives: encryption, decryption, + signature and verification. + To compile this as a module, choose M here: the module + will be called caam_pkc. + config CRYPTO_DEV_FSL_CAAM_RNG_API tristate "Register caam device for hwrng API" depends on CRYPTO_DEV_FSL_CAAM && CRYPTO_DEV_FSL_CAAM_JR diff --git a/drivers/crypto/caam/Makefile b/drivers/crypto/caam/Makefile index 550758a..399ad55 100644 --- a/drivers/crypto/caam/Makefile +++ b/drivers/crypto/caam/Makefile @@ -5,11 +5,15 @@ ifeq ($(CONFIG_CRYPTO_DEV_FSL_CAAM_DEBUG), y) EXTRA_CFLAGS := -DDEBUG endif +ccflags-y += -I$(srctree)/crypto + obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM) += caam.o obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM_JR) += caam_jr.o obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM_CRYPTO_API) += caamalg.o obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM_AHASH_API) += caamhash.o obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM_RNG_API) += caamrng.o +obj-$(CONFIG_CRYPTO_DEV_FSL_CAAM_PKC_API) += caam_pkc.o caam-objs := ctrl.o caam_jr-objs := jr.o key_gen.o error.o +caam_pkc-y := caampkc.o pkc_desc.o diff --git a/drivers/crypto/caam/caampkc.c b/drivers/crypto/caam/caampkc.c new file mode 100644 index 0000000..38a004d --- /dev/null +++ b/drivers/crypto/caam/caampkc.c @@ -0,0 +1,637 @@ +/* + * caam - Freescale FSL CAAM support for Public Key Cryptography + * + * Copyright 2016 Freescale Semiconductor, Inc. + * + * There is no Shared Descriptor for PKC so that the Job Descriptor must carry + * all the desired key parameters, input and output pointers. + */ +#include "compat.h" +#include "regs.h" +#include "intern.h" +#include "jr.h" +#include "error.h" +#include "desc_constr.h" +#include "sg_sw_sec4.h" +#include "caampkc.h" +#include "rsapubkey-asn1.h" +#include "rsaprivkey-asn1.h" + +#define DESC_RSA_PUB_LEN (2 * CAAM_CMD_SZ + sizeof(struct rsa_pub_pdb)) +#define DESC_RSA_PRIV_F1_LEN (2 * CAAM_CMD_SZ + \ + sizeof(struct rsa_priv_f1_pdb)) + +static void rsa_io_unmap(struct device *dev, struct rsa_edesc *edesc, + struct akcipher_request *req) +{ + dma_unmap_sg(dev, req->dst, edesc->dst_nents, DMA_FROM_DEVICE); + dma_unmap_sg(dev, req->src, edesc->src_nents, DMA_TO_DEVICE); + + if (edesc->sec4_sg_bytes) + dma_unmap_single(dev, edesc->sec4_sg_dma, edesc->sec4_sg_bytes, + DMA_TO_DEVICE); +} + +static void rsa_pub_unmap(struct device *dev, struct rsa_edesc *edesc, + struct akcipher_request *req) +{ + struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); + struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); + struct caam_rsa_key *key = &ctx->key; + struct rsa_pub_pdb *pdb = &edesc->pdb.pub; + + dma_unmap_single(dev, pdb->n_dma, key->n_sz, DMA_TO_DEVICE); + dma_unmap_single(dev, pdb->e_dma, key->e_sz, DMA_TO_DEVICE); +} + +static void rsa_priv_f1_unmap(struct device *dev, struct rsa_edesc *edesc, + struct akcipher_request *req) +{ + struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); + struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); + struct caam_rsa_key *key = &ctx->key; + struct rsa_priv_f1_pdb *pdb = &edesc->pdb.priv_f1; + + dma_unmap_single(dev, pdb->n_dma, key->n_sz, DMA_TO_DEVICE); + dma_unmap_single(dev, pdb->d_dma, key->n_sz, DMA_TO_DEVICE); +} + +static size_t skip_to_nonzero(u8 *ptr, size_t nbytes) +{ + size_t nr_zeros = 0; + + while (!(*ptr) && nbytes) { + nbytes--; + ptr++; + nr_zeros++; + } + + return nr_zeros; +} + +static size_t scatterwalk_skip_zeros(struct scatter_walk *walk, size_t nbytes) +{ + size_t len_this_page, nr_zeros, cnt = 0; + u8 *vaddr, *ptr; + + for (;;) { + nr_zeros = 0; + len_this_page = scatterwalk_pagelen(walk); + + if (len_this_page > nbytes) + len_this_page = nbytes; + + vaddr = scatterwalk_map(walk); + ptr = vaddr; + nr_zeros = skip_to_nonzero(ptr, len_this_page); + scatterwalk_unmap(vaddr); + + /* count total number of zeros */ + cnt += nr_zeros; + + /* advance scatterwalk to the nonzero data */ + scatterwalk_advance(walk, nr_zeros); + + if (nr_zeros < len_this_page || nbytes == len_this_page) + break; + + nbytes -= len_this_page; + + scatterwalk_pagedone(walk, 0, 1); + } + + return cnt; +} + +/* + * This function drops the leading zeros and copies the data to the initial + * pointer so that it can be freed later on. Returns the updated data length. + */ +static size_t drop_leading_zeros(struct scatterlist *sg, size_t nbytes) +{ + struct scatter_walk walk_src, walk_dst; + size_t nr_zeros = 0; + + scatterwalk_start(&walk_src, sg); + nr_zeros = scatterwalk_skip_zeros(&walk_src, nbytes); + + if (nr_zeros) { + nbytes = nbytes - nr_zeros; + + scatterwalk_start(&walk_dst, sg); + scatterwalk_sg_copychunks(&walk_dst, &walk_src, nbytes); + scatterwalk_done(&walk_dst, 0, 0); + } + + scatterwalk_done(&walk_src, 0, 0); + + return nbytes; +} + +/* RSA Job Completion handler */ +static void rsa_pub_done(struct device *dev, u32 *desc, u32 err, void *context) +{ + struct akcipher_request *req = context; + struct rsa_edesc *edesc; + + if (err) + caam_jr_strstatus(dev, err); + + /* + * RSA's output is expected to be a big integer. Drop the leading + * zeros since they are not meaningful in the world of numbers. + */ + req->dst_len = drop_leading_zeros(req->dst, req->dst_len); + + edesc = container_of(desc, struct rsa_edesc, hw_desc[0]); + + rsa_pub_unmap(dev, edesc, req); + rsa_io_unmap(dev, edesc, req); + kfree(edesc); + + akcipher_request_complete(req, err); +} + +static void rsa_priv_f1_done(struct device *dev, u32 *desc, u32 err, + void *context) +{ + struct akcipher_request *req = context; + struct rsa_edesc *edesc; + + if (err) + caam_jr_strstatus(dev, err); + + /* + * RSA's output is expected to be a big integer. Drop the leading + * zeros since they are not meaningful in the world of numbers. + */ + req->dst_len = drop_leading_zeros(req->dst, req->dst_len); + + edesc = container_of(desc, struct rsa_edesc, hw_desc[0]); + + rsa_priv_f1_unmap(dev, edesc, req); + rsa_io_unmap(dev, edesc, req); + kfree(edesc); + + akcipher_request_complete(req, err); +} + +static struct rsa_edesc *rsa_edesc_alloc(struct akcipher_request *req, + size_t desclen) +{ + struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); + struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); + struct device *dev = ctx->dev; + struct rsa_edesc *edesc; + gfp_t flags = (req->base.flags & (CRYPTO_TFM_REQ_MAY_BACKLOG | + CRYPTO_TFM_REQ_MAY_SLEEP)) ? GFP_KERNEL : GFP_ATOMIC; + int sgc; + int sec4_sg_index, sec4_sg_len = 0, sec4_sg_bytes; + int src_nents, dst_nents; + + src_nents = sg_nents_for_len(req->src, req->src_len); + dst_nents = sg_nents_for_len(req->dst, req->dst_len); + + if (src_nents > 1) + sec4_sg_len = src_nents; + if (dst_nents > 1) + sec4_sg_len += dst_nents; + + sec4_sg_bytes = sec4_sg_len * sizeof(struct sec4_sg_entry); + + /* allocate space for base edesc, hw desc commands and link tables */ + edesc = kzalloc(sizeof(*edesc) + desclen + sec4_sg_bytes, + GFP_DMA | flags); + if (!edesc) + return ERR_PTR(-ENOMEM); + + sgc = dma_map_sg(dev, req->src, src_nents, DMA_TO_DEVICE); + if (unlikely(!sgc)) { + dev_err(dev, "unable to map source\n"); + goto src_fail; + } + + sgc = dma_map_sg(dev, req->dst, dst_nents, DMA_FROM_DEVICE); + if (unlikely(!sgc)) { + dev_err(dev, "unable to map destination\n"); + goto dst_fail; + } + + edesc->sec4_sg = (void *)edesc + sizeof(*edesc) + desclen; + + sec4_sg_index = 0; + if (src_nents > 1) { + sg_to_sec4_sg_last(req->src, src_nents, edesc->sec4_sg, 0); + sec4_sg_index += src_nents; + } + if (dst_nents > 1) + sg_to_sec4_sg_last(req->dst, dst_nents, + edesc->sec4_sg + sec4_sg_index, 0); + + /* Save nents for later use in Job Descriptor */ + edesc->src_nents = src_nents; + edesc->dst_nents = dst_nents; + + if (!sec4_sg_bytes) + return edesc; + + edesc->sec4_sg_dma = dma_map_single(dev, edesc->sec4_sg, + sec4_sg_bytes, DMA_TO_DEVICE); + if (dma_mapping_error(dev, edesc->sec4_sg_dma)) { + dev_err(dev, "unable to map S/G table\n"); + goto sec4_sg_fail; + } + + edesc->sec4_sg_bytes = sec4_sg_bytes; + + return edesc; + +sec4_sg_fail: + dma_unmap_sg(dev, req->dst, dst_nents, DMA_FROM_DEVICE); +dst_fail: + dma_unmap_sg(dev, req->src, src_nents, DMA_TO_DEVICE); +src_fail: + kfree(edesc); + return ERR_PTR(-ENOMEM); +} + +static int set_rsa_pub_pdb(struct akcipher_request *req, + struct rsa_edesc *edesc) +{ + struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); + struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); + struct caam_rsa_key *key = &ctx->key; + struct device *dev = ctx->dev; + struct rsa_pub_pdb *pdb = &edesc->pdb.pub; + int sec4_sg_index = 0; + + pdb->n_dma = dma_map_single(dev, key->n, key->n_sz, DMA_TO_DEVICE); + if (dma_mapping_error(dev, pdb->n_dma)) { + dev_err(dev, "Unable to map RSA modulus memory\n"); + return -ENOMEM; + } + + pdb->e_dma = dma_map_single(dev, key->e, key->e_sz, DMA_TO_DEVICE); + if (dma_mapping_error(dev, pdb->e_dma)) { + dev_err(dev, "Unable to map RSA public exponent memory\n"); + dma_unmap_single(dev, pdb->n_dma, key->n_sz, DMA_TO_DEVICE); + return -ENOMEM; + } + + if (edesc->src_nents > 1) { + pdb->sgf |= RSA_PDB_SGF_F; + pdb->f_dma = edesc->sec4_sg_dma; + sec4_sg_index += edesc->src_nents; + } else { + pdb->f_dma = sg_dma_address(req->src); + } + + if (edesc->dst_nents > 1) { + pdb->sgf |= RSA_PDB_SGF_G; + pdb->g_dma = edesc->sec4_sg_dma + + sec4_sg_index * sizeof(struct sec4_sg_entry); + } else { + pdb->g_dma = sg_dma_address(req->dst); + } + + pdb->sgf |= (key->e_sz << RSA_PDB_E_SHIFT) | key->n_sz; + pdb->f_len = req->src_len; + + return 0; +} + +static int set_rsa_priv_f1_pdb(struct akcipher_request *req, + struct rsa_edesc *edesc) +{ + struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); + struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); + struct caam_rsa_key *key = &ctx->key; + struct device *dev = ctx->dev; + struct rsa_priv_f1_pdb *pdb = &edesc->pdb.priv_f1; + int sec4_sg_index = 0; + + pdb->n_dma = dma_map_single(dev, key->n, key->n_sz, DMA_TO_DEVICE); + if (dma_mapping_error(dev, pdb->n_dma)) { + dev_err(dev, "Unable to map modulus memory\n"); + return -ENOMEM; + } + + pdb->d_dma = dma_map_single(dev, key->d, key->n_sz, DMA_TO_DEVICE); + if (dma_mapping_error(dev, pdb->d_dma)) { + dev_err(dev, "Unable to map RSA private exponent memory\n"); + dma_unmap_single(dev, pdb->n_dma, key->n_sz, DMA_TO_DEVICE); + return -ENOMEM; + } + + if (edesc->src_nents > 1) { + pdb->sgf |= RSA_PRIV_PDB_SGF_G; + pdb->g_dma = edesc->sec4_sg_dma; + sec4_sg_index += edesc->src_nents; + } else { + pdb->g_dma = sg_dma_address(req->src); + } + + if (edesc->dst_nents > 1) { + pdb->sgf |= RSA_PRIV_PDB_SGF_F; + pdb->f_dma = edesc->sec4_sg_dma + + sec4_sg_index * sizeof(struct sec4_sg_entry); + } else { + pdb->f_dma = sg_dma_address(req->dst); + } + + pdb->sgf |= (key->n_sz << RSA_PDB_D_SHIFT) | key->n_sz; + + return 0; +} + +static int caam_rsa_enc(struct akcipher_request *req) +{ + struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); + struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); + struct caam_rsa_key *key = &ctx->key; + struct device *jrdev = ctx->dev; + struct rsa_edesc *edesc; + int ret; + + if (unlikely(!key->n || !key->e)) + return -EINVAL; + + if (req->dst_len < key->n_sz) { + req->dst_len = key->n_sz; + dev_err(jrdev, "Output buffer length less than parameter n\n"); + return -EOVERFLOW; + } + + /* Allocate extended descriptor */ + edesc = rsa_edesc_alloc(req, DESC_RSA_PUB_LEN); + if (IS_ERR(edesc)) + return PTR_ERR(edesc); + + /* Set RSA Encrypt Protocol Data Block */ + ret = set_rsa_pub_pdb(req, edesc); + if (ret) + goto init_fail; + + /* Initialize Job Descriptor */ + init_rsa_pub_desc(edesc->hw_desc, &edesc->pdb.pub); + + ret = caam_jr_enqueue(jrdev, edesc->hw_desc, rsa_pub_done, req); + if (!ret) + return -EINPROGRESS; + + rsa_pub_unmap(jrdev, edesc, req); + +init_fail: + rsa_io_unmap(jrdev, edesc, req); + kfree(edesc); + return ret; +} + +static int caam_rsa_dec(struct akcipher_request *req) +{ + struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); + struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); + struct caam_rsa_key *key = &ctx->key; + struct device *jrdev = ctx->dev; + struct rsa_edesc *edesc; + int ret; + + if (unlikely(!key->n || !key->d)) + return -EINVAL; + + if (req->dst_len < key->n_sz) { + req->dst_len = key->n_sz; + dev_err(jrdev, "Output buffer length less than parameter n\n"); + return -EOVERFLOW; + } + + /* Allocate extended descriptor */ + edesc = rsa_edesc_alloc(req, DESC_RSA_PRIV_F1_LEN); + if (IS_ERR(edesc)) + return PTR_ERR(edesc); + + /* Set RSA Decrypt Protocol Data Block - Private Key Form #1 */ + ret = set_rsa_priv_f1_pdb(req, edesc); + if (ret) + goto init_fail; + + /* Initialize Job Descriptor */ + init_rsa_priv_f1_desc(edesc->hw_desc, &edesc->pdb.priv_f1); + + ret = caam_jr_enqueue(jrdev, edesc->hw_desc, rsa_priv_f1_done, req); + if (!ret) + return -EINPROGRESS; + + rsa_priv_f1_unmap(jrdev, edesc, req); + +init_fail: + rsa_io_unmap(jrdev, edesc, req); + kfree(edesc); + return ret; +} + +static void caam_rsa_free_key(struct caam_rsa_key *key) +{ + kzfree(key->d); + kfree(key->e); + kfree(key->n); + key->d = NULL; + key->e = NULL; + key->n = NULL; + key->d_sz = 0; + key->e_sz = 0; + key->n_sz = 0; +} + +static int caam_rsa_set_pub_key(struct crypto_akcipher *tfm, const void *key, + unsigned int keylen) +{ + struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); + struct rsa_key *raw_key = &ctx->raw_key; + struct caam_rsa_key *rsa_key = &ctx->key; + int ret; + + /* Free the old RSA key if any */ + caam_rsa_free_key(rsa_key); + + ret = rsa_parse_pub_key(raw_key, key, keylen); + if (ret) + return ret; + + /* Copy key in DMA zone */ + rsa_key->e = kzalloc(raw_key->e_sz, GFP_DMA | GFP_KERNEL); + if (!rsa_key->e) + goto err; + + rsa_key->n = kzalloc(raw_key->n_sz, GFP_DMA | GFP_KERNEL); + if (!rsa_key->n) + goto err; + + rsa_key->e_sz = raw_key->e_sz; + rsa_key->n_sz = raw_key->n_sz; + memcpy(rsa_key->e, raw_key->e, raw_key->e_sz); + memcpy(rsa_key->n, raw_key->n, raw_key->n_sz); + + return 0; +err: + caam_rsa_free_key(rsa_key); + return -ENOMEM; +} + +static int caam_rsa_set_priv_key(struct crypto_akcipher *tfm, const void *key, + unsigned int keylen) +{ + struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); + struct rsa_key *raw_key = &ctx->raw_key; + struct caam_rsa_key *rsa_key = &ctx->key; + int ret; + + /* Free the old RSA key if any */ + caam_rsa_free_key(rsa_key); + + ret = rsa_parse_priv_key(raw_key, key, keylen); + if (ret) + return ret; + + /* Copy key in DMA zone */ + rsa_key->d = kzalloc(raw_key->d_sz, GFP_DMA | GFP_KERNEL); + if (!rsa_key->d) + goto err; + + rsa_key->e = kzalloc(raw_key->e_sz, GFP_DMA | GFP_KERNEL); + if (!rsa_key->e) + goto err; + + rsa_key->n = kzalloc(raw_key->n_sz, GFP_DMA | GFP_KERNEL); + if (!rsa_key->n) + goto err; + + rsa_key->d_sz = raw_key->d_sz; + rsa_key->e_sz = raw_key->e_sz; + rsa_key->n_sz = raw_key->n_sz; + memcpy(rsa_key->d, raw_key->d, raw_key->d_sz); + memcpy(rsa_key->e, raw_key->e, raw_key->e_sz); + memcpy(rsa_key->n, raw_key->n, raw_key->n_sz); + + return 0; + +err: + caam_rsa_free_key(rsa_key); + return -ENOMEM; +} + +static int caam_rsa_max_size(struct crypto_akcipher *tfm) +{ + struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); + struct caam_rsa_key *key = &ctx->key; + + return (key->n) ? key->n_sz : -EINVAL; +} + +/* Per session pkc's driver context creation function */ +static int caam_rsa_init_tfm(struct crypto_akcipher *tfm) +{ + struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); + + ctx->dev = caam_jr_alloc(); + + if (IS_ERR(ctx->dev)) { + dev_err(ctx->dev, "Job Ring Device allocation for transform failed\n"); + return PTR_ERR(ctx->dev); + } + + return 0; +} + +/* Per session pkc's driver context cleanup function */ +static void caam_rsa_exit_tfm(struct crypto_akcipher *tfm) +{ + struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); + struct caam_rsa_key *key = &ctx->key; + + caam_rsa_free_key(key); + caam_jr_free(ctx->dev); +} + +static struct akcipher_alg caam_rsa = { + .encrypt = caam_rsa_enc, + .decrypt = caam_rsa_dec, + .sign = caam_rsa_dec, + .verify = caam_rsa_enc, + .set_pub_key = caam_rsa_set_pub_key, + .set_priv_key = caam_rsa_set_priv_key, + .max_size = caam_rsa_max_size, + .init = caam_rsa_init_tfm, + .exit = caam_rsa_exit_tfm, + .base = { + .cra_name = "rsa", + .cra_driver_name = "rsa-caam", + .cra_priority = 3000, + .cra_module = THIS_MODULE, + .cra_ctxsize = sizeof(struct caam_rsa_ctx), + }, +}; + +/* Public Key Cryptography module initialization handler */ +static int __init caam_pkc_init(void) +{ + struct device_node *dev_node; + struct platform_device *pdev; + struct device *ctrldev; + struct caam_drv_private *priv; + u32 cha_inst, pk_inst; + int err; + + dev_node = of_find_compatible_node(NULL, NULL, "fsl,sec-v4.0"); + if (!dev_node) { + dev_node = of_find_compatible_node(NULL, NULL, "fsl,sec4.0"); + if (!dev_node) + return -ENODEV; + } + + pdev = of_find_device_by_node(dev_node); + if (!pdev) { + of_node_put(dev_node); + return -ENODEV; + } + + ctrldev = &pdev->dev; + priv = dev_get_drvdata(ctrldev); + of_node_put(dev_node); + + /* + * If priv is NULL, it's probably because the caam driver wasn't + * properly initialized (e.g. RNG4 init failed). Thus, bail out here. + */ + if (!priv) + return -ENODEV; + + /* Determine public key hardware accelerator presence. */ + cha_inst = rd_reg32(&priv->ctrl->perfmon.cha_num_ls); + pk_inst = (cha_inst & CHA_ID_LS_PK_MASK) >> CHA_ID_LS_PK_SHIFT; + + /* Do not register algorithms if PKHA is not present. */ + if (!pk_inst) + return -ENODEV; + + err = crypto_register_akcipher(&caam_rsa); + if (err) + dev_warn(ctrldev, "%s alg registration failed\n", + caam_rsa.base.cra_driver_name); + else + dev_info(ctrldev, "caam pkc algorithms registered in /proc/crypto\n"); + + return err; +} + +static void __exit caam_pkc_exit(void) +{ + crypto_unregister_akcipher(&caam_rsa); +} + +module_init(caam_pkc_init); +module_exit(caam_pkc_exit); + +MODULE_LICENSE("Dual BSD/GPL"); +MODULE_DESCRIPTION("FSL CAAM support for PKC functions of crypto API"); +MODULE_AUTHOR("Freescale Semiconductor"); diff --git a/drivers/crypto/caam/caampkc.h b/drivers/crypto/caam/caampkc.h new file mode 100644 index 0000000..a9bed48 --- /dev/null +++ b/drivers/crypto/caam/caampkc.h @@ -0,0 +1,72 @@ +/* + * caam - Freescale FSL CAAM support for Public Key Cryptography descriptors + * + * Copyright 2016 Freescale Semiconductor, Inc. + * + * There is no Shared Descriptor for PKC so that the Job Descriptor must carry + * all the desired key parameters, input and output pointers. + */ + +#ifndef _PKC_DESC_H_ +#define _PKC_DESC_H_ +#include "compat.h" +#include "pdb.h" + +/** + * caam_rsa_key - CAAM RSA key structure. Keys are allocated in DMA zone. + * @n : RSA modulus raw byte stream + * @e : RSA public exponent raw byte stream + * @d : RSA private exponent raw byte stream + * @n_sz : length in bytes of RSA modulus n + * @e_sz : length in bytes of RSA public exponent + * @d_sz : length in bytes of RSA private exponent + */ +struct caam_rsa_key { + u8 *n; + u8 *e; + u8 *d; + size_t n_sz; + size_t e_sz; + size_t d_sz; +}; + +/** + * caam_rsa_ctx - per session context. + * @raw_key : raw RSA key parsed by the ASN.1 decoder + * @key : CAAM RSA key in DMA zone + * @dev : device structure + */ +struct caam_rsa_ctx { + struct rsa_key raw_key; + struct caam_rsa_key key; + struct device *dev; +}; + +/** + * rsa_edesc - s/w-extended rsa descriptor + * @src_nents : number of segments in input scatterlist + * @dst_nents : number of segments in output scatterlist + * @sec4_sg_bytes : length of h/w link table + * @sec4_sg_dma : dma address of h/w link table + * @sec4_sg : pointer to h/w link table + * @pdb : specific RSA Protocol Data Block (PDB) + * @hw_desc : descriptor followed by link tables if any + */ +struct rsa_edesc { + int src_nents; + int dst_nents; + int sec4_sg_bytes; + dma_addr_t sec4_sg_dma; + struct sec4_sg_entry *sec4_sg; + union { + struct rsa_pub_pdb pub; + struct rsa_priv_f1_pdb priv_f1; + } pdb; + u32 hw_desc[]; +}; + +/* Descriptor construction primitives. */ +void init_rsa_pub_desc(u32 *desc, struct rsa_pub_pdb *pdb); +void init_rsa_priv_f1_desc(u32 *desc, struct rsa_priv_f1_pdb *pdb); + +#endif diff --git a/drivers/crypto/caam/compat.h b/drivers/crypto/caam/compat.h index b6955ec..7149cd2 100644 --- a/drivers/crypto/caam/compat.h +++ b/drivers/crypto/caam/compat.h @@ -35,8 +35,11 @@ #include #include #include +#include #include #include #include +#include +#include #endif /* !defined(CAAM_COMPAT_H) */ diff --git a/drivers/crypto/caam/desc.h b/drivers/crypto/caam/desc.h index 1e93c6a..7e5c027 100644 --- a/drivers/crypto/caam/desc.h +++ b/drivers/crypto/caam/desc.h @@ -454,6 +454,8 @@ struct sec4_sg_entry { #define OP_PCLID_PUBLICKEYPAIR (0x14 << OP_PCLID_SHIFT) #define OP_PCLID_DSASIGN (0x15 << OP_PCLID_SHIFT) #define OP_PCLID_DSAVERIFY (0x16 << OP_PCLID_SHIFT) +#define OP_PCLID_RSAENC_PUBKEY (0x18 << OP_PCLID_SHIFT) +#define OP_PCLID_RSADEC_PRVKEY (0x19 << OP_PCLID_SHIFT) /* Assuming OP_TYPE = OP_TYPE_DECAP_PROTOCOL/ENCAP_PROTOCOL */ #define OP_PCLID_IPSEC (0x01 << OP_PCLID_SHIFT) diff --git a/drivers/crypto/caam/desc_constr.h b/drivers/crypto/caam/desc_constr.h index 98d07de..3ff47b9 100644 --- a/drivers/crypto/caam/desc_constr.h +++ b/drivers/crypto/caam/desc_constr.h @@ -74,6 +74,13 @@ static inline void init_job_desc(u32 *desc, u32 options) init_desc(desc, CMD_DESC_HDR | options); } +static inline void init_job_desc_pdb(u32 *desc, u32 options, size_t pdb_bytes) +{ + u32 pdb_len = (pdb_bytes + CAAM_CMD_SZ - 1) / CAAM_CMD_SZ; + + init_job_desc(desc, (((pdb_len + 1) << HDR_START_IDX_SHIFT)) | options); +} + static inline void append_ptr(u32 *desc, dma_addr_t ptr) { dma_addr_t *offset = (dma_addr_t *)desc_end(desc); diff --git a/drivers/crypto/caam/pdb.h b/drivers/crypto/caam/pdb.h index 3a87c0c..d0a5db2 100644 --- a/drivers/crypto/caam/pdb.h +++ b/drivers/crypto/caam/pdb.h @@ -1,12 +1,13 @@ /* * CAAM Protocol Data Block (PDB) definition header file * - * Copyright 2008-2012 Freescale Semiconductor, Inc. + * Copyright 2008-2016 Freescale Semiconductor, Inc. * */ #ifndef CAAM_PDB_H #define CAAM_PDB_H +#include "compat.h" /* * PDB- IPSec ESP Header Modification Options @@ -399,4 +400,52 @@ struct dsa_verify_pdb { u8 *ab; /* only used if ECC processing */ }; +/* RSA Protocol Data Block */ +#define RSA_PDB_SGF_SHIFT 28 +#define RSA_PDB_E_SHIFT 12 +#define RSA_PDB_E_MASK (0xFFF << RSA_PDB_E_SHIFT) +#define RSA_PDB_D_SHIFT 12 +#define RSA_PDB_D_MASK (0xFFF << RSA_PDB_D_SHIFT) + +#define RSA_PDB_SGF_F (0x8 << RSA_PDB_SGF_SHIFT) +#define RSA_PDB_SGF_G (0x4 << RSA_PDB_SGF_SHIFT) +#define RSA_PRIV_PDB_SGF_F (0x4 << RSA_PDB_SGF_SHIFT) +#define RSA_PRIV_PDB_SGF_G (0x8 << RSA_PDB_SGF_SHIFT) + +#define RSA_PRIV_KEY_FRM_1 0 + +/** + * RSA Encrypt Protocol Data Block + * @sgf: scatter-gather field + * @f_dma: dma address of input data + * @g_dma: dma address of encrypted output data + * @n_dma: dma address of RSA modulus + * @e_dma: dma address of RSA public exponent + * @f_len: length in octets of the input data + */ +struct rsa_pub_pdb { + u32 sgf; + dma_addr_t f_dma; + dma_addr_t g_dma; + dma_addr_t n_dma; + dma_addr_t e_dma; + u32 f_len; +} __packed; + +/** + * RSA Decrypt PDB - Private Key Form #1 + * @sgf: scatter-gather field + * @g_dma: dma address of encrypted input data + * @f_dma: dma address of output data + * @n_dma: dma address of RSA modulus + * @d_dma: dma address of RSA private exponent + */ +struct rsa_priv_f1_pdb { + u32 sgf; + dma_addr_t g_dma; + dma_addr_t f_dma; + dma_addr_t n_dma; + dma_addr_t d_dma; +} __packed; + #endif diff --git a/drivers/crypto/caam/pkc_desc.c b/drivers/crypto/caam/pkc_desc.c new file mode 100644 index 0000000..4e4183e --- /dev/null +++ b/drivers/crypto/caam/pkc_desc.c @@ -0,0 +1,36 @@ +/* + * caam - Freescale FSL CAAM support for Public Key Cryptography descriptors + * + * Copyright 2016 Freescale Semiconductor, Inc. + * + * There is no Shared Descriptor for PKC so that the Job Descriptor must carry + * all the desired key parameters, input and output pointers. + */ +#include "caampkc.h" +#include "desc_constr.h" + +/* Descriptor for RSA Public operation */ +void init_rsa_pub_desc(u32 *desc, struct rsa_pub_pdb *pdb) +{ + init_job_desc_pdb(desc, 0, sizeof(*pdb)); + append_cmd(desc, pdb->sgf); + append_ptr(desc, pdb->f_dma); + append_ptr(desc, pdb->g_dma); + append_ptr(desc, pdb->n_dma); + append_ptr(desc, pdb->e_dma); + append_cmd(desc, pdb->f_len); + append_operation(desc, OP_TYPE_UNI_PROTOCOL | OP_PCLID_RSAENC_PUBKEY); +} + +/* Descriptor for RSA Private operation - Private Key Form #1 */ +void init_rsa_priv_f1_desc(u32 *desc, struct rsa_priv_f1_pdb *pdb) +{ + init_job_desc_pdb(desc, 0, sizeof(*pdb)); + append_cmd(desc, pdb->sgf); + append_ptr(desc, pdb->g_dma); + append_ptr(desc, pdb->f_dma); + append_ptr(desc, pdb->n_dma); + append_ptr(desc, pdb->d_dma); + append_operation(desc, OP_TYPE_UNI_PROTOCOL | OP_PCLID_RSADEC_PRVKEY | + RSA_PRIV_KEY_FRM_1); +}