From patchwork Tue Mar 16 21:07:31 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Berger X-Patchwork-Id: 401846 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7649EC432C3 for ; Tue, 16 Mar 2021 21:08:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 62CB464FB1 for ; Tue, 16 Mar 2021 21:08:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232329AbhCPVIR (ORCPT ); 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Tue, 16 Mar 2021 21:07:51 GMT Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 3C12A136059; Tue, 16 Mar 2021 21:07:51 +0000 (GMT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 649BD136055; Tue, 16 Mar 2021 21:07:50 +0000 (GMT) Received: from localhost.localdomain (unknown [9.47.158.152]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTP; Tue, 16 Mar 2021 21:07:50 +0000 (GMT) From: Stefan Berger To: keyrings@vger.kernel.org, linux-crypto@vger.kernel.org, davem@davemloft.net, herbert@gondor.apana.org.au, dhowells@redhat.com, zohar@linux.ibm.com, jarkko@kernel.org Cc: linux-integrity@vger.kernel.org, linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org, patrick@puiterwijk.org, Stefan Berger Subject: [PATCH v12 01/10] oid_registry: Add OIDs for ECDSA with SHA224/256/384/512 Date: Tue, 16 Mar 2021 17:07:31 -0400 Message-Id: <20210316210740.1592994-2-stefanb@linux.ibm.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210316210740.1592994-1-stefanb@linux.ibm.com> References: <20210316210740.1592994-1-stefanb@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.369, 18.0.761 definitions=2021-03-16_08:2021-03-16,2021-03-16 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 impostorscore=0 mlxlogscore=903 mlxscore=0 bulkscore=0 priorityscore=1501 adultscore=0 lowpriorityscore=0 phishscore=0 clxscore=1015 malwarescore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2103160130 Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org Add OIDs for ECDSA with SHA224/256/384/512. Signed-off-by: Stefan Berger Acked-by: Jarkko Sakkinen --- include/linux/oid_registry.h | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/include/linux/oid_registry.h b/include/linux/oid_registry.h index 4462ed2c18cd..b504e2f36b25 100644 --- a/include/linux/oid_registry.h +++ b/include/linux/oid_registry.h @@ -19,8 +19,12 @@ enum OID { OID_id_dsa_with_sha1, /* 1.2.840.10030.4.3 */ OID_id_dsa, /* 1.2.840.10040.4.1 */ - OID_id_ecdsa_with_sha1, /* 1.2.840.10045.4.1 */ OID_id_ecPublicKey, /* 1.2.840.10045.2.1 */ + OID_id_ecdsa_with_sha1, /* 1.2.840.10045.4.1 */ + OID_id_ecdsa_with_sha224, /* 1.2.840.10045.4.3.1 */ + OID_id_ecdsa_with_sha256, /* 1.2.840.10045.4.3.2 */ + OID_id_ecdsa_with_sha384, /* 1.2.840.10045.4.3.3 */ + OID_id_ecdsa_with_sha512, /* 1.2.840.10045.4.3.4 */ /* PKCS#1 {iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs-1(1)} */ OID_rsaEncryption, /* 1.2.840.113549.1.1.1 */ From patchwork Tue Mar 16 21:07:32 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Berger X-Patchwork-Id: 401842 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AC470C2BB9A for ; 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Tue, 16 Mar 2021 21:07:52 GMT Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 42B3C136051; Tue, 16 Mar 2021 21:07:52 +0000 (GMT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 58050136055; Tue, 16 Mar 2021 21:07:51 +0000 (GMT) Received: from localhost.localdomain (unknown [9.47.158.152]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTP; Tue, 16 Mar 2021 21:07:51 +0000 (GMT) From: Stefan Berger To: keyrings@vger.kernel.org, linux-crypto@vger.kernel.org, davem@davemloft.net, herbert@gondor.apana.org.au, dhowells@redhat.com, zohar@linux.ibm.com, jarkko@kernel.org Cc: linux-integrity@vger.kernel.org, linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org, patrick@puiterwijk.org, Stefan Berger Subject: [PATCH v12 02/10] crypto: Add support for ECDSA signature verification Date: Tue, 16 Mar 2021 17:07:32 -0400 Message-Id: <20210316210740.1592994-3-stefanb@linux.ibm.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210316210740.1592994-1-stefanb@linux.ibm.com> References: <20210316210740.1592994-1-stefanb@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.369, 18.0.761 definitions=2021-03-16_08:2021-03-16,2021-03-16 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=999 clxscore=1015 bulkscore=0 impostorscore=0 phishscore=0 adultscore=0 suspectscore=0 priorityscore=1501 lowpriorityscore=0 spamscore=0 mlxscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2103160135 Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org Add support for parsing the parameters of a NIST P256 or NIST P192 key. Enable signature verification using these keys. The new module is enabled with CONFIG_ECDSA: Elliptic Curve Digital Signature Algorithm (NIST P192, P256 etc.) is A NIST cryptographic standard algorithm. Only signature verification is implemented. Cc: Herbert Xu Cc: "David S. Miller" Cc: linux-crypto@vger.kernel.org Signed-off-by: Stefan Berger Signed-off-by: Lukas Wunner --- v10->v11: - Split off OID definitions for ECDSA with sha224/256/384/512 - Addressed Jarkko's comments v8->v9: - unregister nist_p192 curve if nist_p256 cannot be registered --- crypto/Kconfig | 10 ++ crypto/Makefile | 6 + crypto/ecc.c | 13 +- crypto/ecc.h | 25 +++ crypto/ecdsa.c | 345 +++++++++++++++++++++++++++++++++++++ crypto/ecdsasignature.asn1 | 4 + crypto/testmgr.c | 12 ++ crypto/testmgr.h | 267 ++++++++++++++++++++++++++++ 8 files changed, 671 insertions(+), 11 deletions(-) create mode 100644 crypto/ecdsa.c create mode 100644 crypto/ecdsasignature.asn1 diff --git a/crypto/Kconfig b/crypto/Kconfig index a367fcfeb5d4..a31df40591f5 100644 --- a/crypto/Kconfig +++ b/crypto/Kconfig @@ -247,6 +247,16 @@ config CRYPTO_ECDH help Generic implementation of the ECDH algorithm +config CRYPTO_ECDSA + tristate "ECDSA (NIST P192, P256 etc.) algorithm" + select CRYPTO_ECC + select CRYPTO_AKCIPHER + select ASN1 + help + Elliptic Curve Digital Signature Algorithm (NIST P192, P256 etc.) + is A NIST cryptographic standard algorithm. Only signature verification + is implemented. + config CRYPTO_ECRDSA tristate "EC-RDSA (GOST 34.10) algorithm" select CRYPTO_ECC diff --git a/crypto/Makefile b/crypto/Makefile index b279483fba50..982066c6bdfb 100644 --- a/crypto/Makefile +++ b/crypto/Makefile @@ -50,6 +50,12 @@ sm2_generic-y += sm2.o obj-$(CONFIG_CRYPTO_SM2) += sm2_generic.o +$(obj)/ecdsasignature.asn1.o: $(obj)/ecdsasignature.asn1.c $(obj)/ecdsasignature.asn1.h +$(obj)/ecdsa.o: $(obj)/ecdsasignature.asn1.h +ecdsa_generic-y += ecdsa.o +ecdsa_generic-y += ecdsasignature.asn1.o +obj-$(CONFIG_CRYPTO_ECDSA) += ecdsa_generic.o + crypto_acompress-y := acompress.o crypto_acompress-y += scompress.o obj-$(CONFIG_CRYPTO_ACOMP2) += crypto_acompress.o diff --git a/crypto/ecc.c b/crypto/ecc.c index c80aa25994a0..25e79fd70566 100644 --- a/crypto/ecc.c +++ b/crypto/ecc.c @@ -42,7 +42,7 @@ typedef struct { u64 m_high; } uint128_t; -static inline const struct ecc_curve *ecc_get_curve(unsigned int curve_id) +const struct ecc_curve *ecc_get_curve(unsigned int curve_id) { switch (curve_id) { /* In FIPS mode only allow P256 and higher */ @@ -54,6 +54,7 @@ static inline const struct ecc_curve *ecc_get_curve(unsigned int curve_id) return NULL; } } +EXPORT_SYMBOL(ecc_get_curve); static u64 *ecc_alloc_digits_space(unsigned int ndigits) { @@ -1281,16 +1282,6 @@ void ecc_point_mult_shamir(const struct ecc_point *result, } EXPORT_SYMBOL(ecc_point_mult_shamir); -static inline void ecc_swap_digits(const u64 *in, u64 *out, - unsigned int ndigits) -{ - const __be64 *src = (__force __be64 *)in; - int i; - - for (i = 0; i < ndigits; i++) - out[i] = be64_to_cpu(src[ndigits - 1 - i]); -} - static int __ecc_is_key_valid(const struct ecc_curve *curve, const u64 *private_key, unsigned int ndigits) { diff --git a/crypto/ecc.h b/crypto/ecc.h index d4e546b9ad79..e0e2aed0557a 100644 --- a/crypto/ecc.h +++ b/crypto/ecc.h @@ -33,6 +33,8 @@ #define ECC_DIGITS_TO_BYTES_SHIFT 3 +#define ECC_MAX_BYTES (ECC_MAX_DIGITS << ECC_DIGITS_TO_BYTES_SHIFT) + /** * struct ecc_point - elliptic curve point in affine coordinates * @@ -70,6 +72,29 @@ struct ecc_curve { u64 *b; }; +/** + * ecc_swap_digits() - Copy ndigits from big endian array to native array + * @in: Input array + * @out: Output array + * @ndigits: Number of digits to copy + */ +static inline void ecc_swap_digits(const u64 *in, u64 *out, unsigned int ndigits) +{ + const __be64 *src = (__force __be64 *)in; + int i; + + for (i = 0; i < ndigits; i++) + out[i] = be64_to_cpu(src[ndigits - 1 - i]); +} + +/** + * ecc_get_curve() - Get a curve given its curve_id + * @curve_id: Id of the curve + * + * Returns pointer to the curve data, NULL if curve is not available + */ +const struct ecc_curve *ecc_get_curve(unsigned int curve_id); + /** * ecc_is_key_valid() - Validate a given ECDH private key * diff --git a/crypto/ecdsa.c b/crypto/ecdsa.c new file mode 100644 index 000000000000..c7fa2c190fdb --- /dev/null +++ b/crypto/ecdsa.c @@ -0,0 +1,345 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (c) 2021 IBM Corporation + */ + +#include +#include +#include +#include +#include +#include + +#include "ecc.h" +#include "ecdsasignature.asn1.h" + +struct ecc_ctx { + unsigned int curve_id; + const struct ecc_curve *curve; + + bool pub_key_set; + u64 x[ECC_MAX_DIGITS]; /* pub key x and y coordinates */ + u64 y[ECC_MAX_DIGITS]; + struct ecc_point pub_key; +}; + +struct ecdsa_signature_ctx { + const struct ecc_curve *curve; + u64 r[ECC_MAX_DIGITS]; + u64 s[ECC_MAX_DIGITS]; +}; + +/* + * Get the r and s components of a signature from the X509 certificate. + */ +static int ecdsa_get_signature_rs(u64 *dest, size_t hdrlen, unsigned char tag, + const void *value, size_t vlen, unsigned int ndigits) +{ + size_t keylen = ndigits * sizeof(u64); + ssize_t diff = vlen - keylen; + const char *d = value; + u8 rs[ECC_MAX_BYTES]; + + if (!value || !vlen) + return -EINVAL; + + /* diff = 0: 'value' has exacly the right size + * diff > 0: 'value' has too many bytes; one leading zero is allowed that + * makes the value a positive integer; error on more + * diff < 0: 'value' is missing leading zeros, which we add + */ + if (diff > 0) { + /* skip over leading zeros that make 'value' a positive int */ + if (*d == 0) { + vlen -= 1; + diff--; + d++; + } + if (diff) + return -EINVAL; + } + if (-diff >= keylen) + return -EINVAL; + + if (diff) { + /* leading zeros not given in 'value' */ + memset(rs, 0, -diff); + } + + memcpy(&rs[-diff], d, vlen); + + ecc_swap_digits((u64 *)rs, dest, ndigits); + + return 0; +} + +int ecdsa_get_signature_r(void *context, size_t hdrlen, unsigned char tag, + const void *value, size_t vlen) +{ + struct ecdsa_signature_ctx *sig = context; + + return ecdsa_get_signature_rs(sig->r, hdrlen, tag, value, vlen, + sig->curve->g.ndigits); +} + +int ecdsa_get_signature_s(void *context, size_t hdrlen, unsigned char tag, + const void *value, size_t vlen) +{ + struct ecdsa_signature_ctx *sig = context; + + return ecdsa_get_signature_rs(sig->s, hdrlen, tag, value, vlen, + sig->curve->g.ndigits); +} + +static int _ecdsa_verify(struct ecc_ctx *ctx, const u64 *hash, const u64 *r, const u64 *s) +{ + const struct ecc_curve *curve = ctx->curve; + unsigned int ndigits = curve->g.ndigits; + u64 s1[ECC_MAX_DIGITS]; + u64 u1[ECC_MAX_DIGITS]; + u64 u2[ECC_MAX_DIGITS]; + u64 x1[ECC_MAX_DIGITS]; + u64 y1[ECC_MAX_DIGITS]; + struct ecc_point res = ECC_POINT_INIT(x1, y1, ndigits); + + /* 0 < r < n and 0 < s < n */ + if (vli_is_zero(r, ndigits) || vli_cmp(r, curve->n, ndigits) >= 0 || + vli_is_zero(s, ndigits) || vli_cmp(s, curve->n, ndigits) >= 0) + return -EBADMSG; + + /* hash is given */ + pr_devel("hash : %016llx %016llx ... %016llx\n", + hash[ndigits - 1], hash[ndigits - 2], hash[0]); + + /* s1 = (s^-1) mod n */ + vli_mod_inv(s1, s, curve->n, ndigits); + /* u1 = (hash * s1) mod n */ + vli_mod_mult_slow(u1, hash, s1, curve->n, ndigits); + /* u2 = (r * s1) mod n */ + vli_mod_mult_slow(u2, r, s1, curve->n, ndigits); + /* res = u1*G + u2 * pub_key */ + ecc_point_mult_shamir(&res, u1, &curve->g, u2, &ctx->pub_key, curve); + + /* res.x = res.x mod n (if res.x > order) */ + if (unlikely(vli_cmp(res.x, curve->n, ndigits) == 1)) + /* faster alternative for NIST p256 & p192 */ + vli_sub(res.x, res.x, curve->n, ndigits); + + if (!vli_cmp(res.x, r, ndigits)) + return 0; + + return -EKEYREJECTED; +} + +/* + * Verify an ECDSA signature. + */ +static int ecdsa_verify(struct akcipher_request *req) +{ + struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); + struct ecc_ctx *ctx = akcipher_tfm_ctx(tfm); + size_t keylen = ctx->curve->g.ndigits * sizeof(u64); + struct ecdsa_signature_ctx sig_ctx = { + .curve = ctx->curve, + }; + u8 rawhash[ECC_MAX_BYTES]; + u64 hash[ECC_MAX_DIGITS]; + unsigned char *buffer; + ssize_t diff; + int ret; + + if (unlikely(!ctx->pub_key_set)) + return -EINVAL; + + buffer = kmalloc(req->src_len + req->dst_len, GFP_KERNEL); + if (!buffer) + return -ENOMEM; + + sg_pcopy_to_buffer(req->src, + sg_nents_for_len(req->src, req->src_len + req->dst_len), + buffer, req->src_len + req->dst_len, 0); + + ret = asn1_ber_decoder(&ecdsasignature_decoder, &sig_ctx, + buffer, req->src_len); + if (ret < 0) + goto error; + + /* if the hash is shorter then we will add leading zeros to fit to ndigits */ + diff = keylen - req->dst_len; + if (diff >= 0) { + if (diff) + memset(rawhash, 0, diff); + memcpy(&rawhash[diff], buffer + req->src_len, req->dst_len); + } else if (diff < 0) { + /* given hash is longer, we take the left-most bytes */ + memcpy(&rawhash, buffer + req->src_len, keylen); + } + + ecc_swap_digits((u64 *)rawhash, hash, ctx->curve->g.ndigits); + + ret = _ecdsa_verify(ctx, hash, sig_ctx.r, sig_ctx.s); + +error: + kfree(buffer); + + return ret; +} + +static int ecdsa_ecc_ctx_init(struct ecc_ctx *ctx, unsigned int curve_id) +{ + ctx->curve_id = curve_id; + ctx->curve = ecc_get_curve(curve_id); + if (!ctx->curve) + return -EINVAL; + + return 0; +} + + +static void ecdsa_ecc_ctx_deinit(struct ecc_ctx *ctx) +{ + ctx->pub_key_set = false; +} + +static int ecdsa_ecc_ctx_reset(struct ecc_ctx *ctx) +{ + unsigned int curve_id = ctx->curve_id; + int ret; + + ecdsa_ecc_ctx_deinit(ctx); + ret = ecdsa_ecc_ctx_init(ctx, curve_id); + if (ret == 0) + ctx->pub_key = ECC_POINT_INIT(ctx->x, ctx->y, + ctx->curve->g.ndigits); + return ret; +} + +/* + * Set the public key given the raw uncompressed key data from an X509 + * certificate. The key data contain the concatenated X and Y coordinates of + * the public key. + */ +static int ecdsa_set_pub_key(struct crypto_akcipher *tfm, const void *key, unsigned int keylen) +{ + struct ecc_ctx *ctx = akcipher_tfm_ctx(tfm); + const unsigned char *d = key; + const u64 *digits = (const u64 *)&d[1]; + unsigned int ndigits; + int ret; + + ret = ecdsa_ecc_ctx_reset(ctx); + if (ret < 0) + return ret; + + if (keylen < 1 || (((keylen - 1) >> 1) % sizeof(u64)) != 0) + return -EINVAL; + /* we only accept uncompressed format indicated by '4' */ + if (d[0] != 4) + return -EINVAL; + + keylen--; + ndigits = (keylen >> 1) / sizeof(u64); + if (ndigits != ctx->curve->g.ndigits) + return -EINVAL; + + ecc_swap_digits(digits, ctx->pub_key.x, ndigits); + ecc_swap_digits(&digits[ndigits], ctx->pub_key.y, ndigits); + ret = ecc_is_pubkey_valid_full(ctx->curve, &ctx->pub_key); + + ctx->pub_key_set = ret == 0; + + return ret; +} + +static void ecdsa_exit_tfm(struct crypto_akcipher *tfm) +{ + struct ecc_ctx *ctx = akcipher_tfm_ctx(tfm); + + ecdsa_ecc_ctx_deinit(ctx); +} + +static unsigned int ecdsa_max_size(struct crypto_akcipher *tfm) +{ + struct ecc_ctx *ctx = akcipher_tfm_ctx(tfm); + + return ctx->pub_key.ndigits << ECC_DIGITS_TO_BYTES_SHIFT; +} + +static int ecdsa_nist_p256_init_tfm(struct crypto_akcipher *tfm) +{ + struct ecc_ctx *ctx = akcipher_tfm_ctx(tfm); + + return ecdsa_ecc_ctx_init(ctx, ECC_CURVE_NIST_P256); +} + +static struct akcipher_alg ecdsa_nist_p256 = { + .verify = ecdsa_verify, + .set_pub_key = ecdsa_set_pub_key, + .max_size = ecdsa_max_size, + .init = ecdsa_nist_p256_init_tfm, + .exit = ecdsa_exit_tfm, + .base = { + .cra_name = "ecdsa-nist-p256", + .cra_driver_name = "ecdsa-nist-p256-generic", + .cra_priority = 100, + .cra_module = THIS_MODULE, + .cra_ctxsize = sizeof(struct ecc_ctx), + }, +}; + +static int ecdsa_nist_p192_init_tfm(struct crypto_akcipher *tfm) +{ + struct ecc_ctx *ctx = akcipher_tfm_ctx(tfm); + + return ecdsa_ecc_ctx_init(ctx, ECC_CURVE_NIST_P192); +} + +static struct akcipher_alg ecdsa_nist_p192 = { + .verify = ecdsa_verify, + .set_pub_key = ecdsa_set_pub_key, + .max_size = ecdsa_max_size, + .init = ecdsa_nist_p192_init_tfm, + .exit = ecdsa_exit_tfm, + .base = { + .cra_name = "ecdsa-nist-p192", + .cra_driver_name = "ecdsa-nist-p192-generic", + .cra_priority = 100, + .cra_module = THIS_MODULE, + .cra_ctxsize = sizeof(struct ecc_ctx), + }, +}; +static bool ecdsa_nist_p192_registered; + +static int ecdsa_init(void) +{ + int ret; + + /* NIST p192 may not be available in FIPS mode */ + ret = crypto_register_akcipher(&ecdsa_nist_p192); + ecdsa_nist_p192_registered = ret == 0; + + ret = crypto_register_akcipher(&ecdsa_nist_p256); + if (ret) + goto nist_p256_error; + return 0; + +nist_p256_error: + if (ecdsa_nist_p192_registered) + crypto_unregister_akcipher(&ecdsa_nist_p192); + return ret; +} + +static void ecdsa_exit(void) +{ + if (ecdsa_nist_p192_registered) + crypto_unregister_akcipher(&ecdsa_nist_p192); + crypto_unregister_akcipher(&ecdsa_nist_p256); +} + +subsys_initcall(ecdsa_init); +module_exit(ecdsa_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Stefan Berger "); +MODULE_DESCRIPTION("ECDSA generic algorithm"); +MODULE_ALIAS_CRYPTO("ecdsa-generic"); diff --git a/crypto/ecdsasignature.asn1 b/crypto/ecdsasignature.asn1 new file mode 100644 index 000000000000..621ab754fb9f --- /dev/null +++ b/crypto/ecdsasignature.asn1 @@ -0,0 +1,4 @@ +ECDSASignature ::= SEQUENCE { + r INTEGER ({ ecdsa_get_signature_r }), + s INTEGER ({ ecdsa_get_signature_s }) +} diff --git a/crypto/testmgr.c b/crypto/testmgr.c index 321e38eef51b..2607602f9de5 100644 --- a/crypto/testmgr.c +++ b/crypto/testmgr.c @@ -4913,6 +4913,18 @@ static const struct alg_test_desc alg_test_descs[] = { .suite = { .kpp = __VECS(ecdh_tv_template) } + }, { + .alg = "ecdsa-nist-p192", + .test = alg_test_akcipher, + .suite = { + .akcipher = __VECS(ecdsa_nist_p192_tv_template) + } + }, { + .alg = "ecdsa-nist-p256", + .test = alg_test_akcipher, + .suite = { + .akcipher = __VECS(ecdsa_nist_p256_tv_template) + } }, { .alg = "ecrdsa", .test = alg_test_akcipher, diff --git a/crypto/testmgr.h b/crypto/testmgr.h index 8c83811c0e35..2adcc0dc0bdd 100644 --- a/crypto/testmgr.h +++ b/crypto/testmgr.h @@ -566,6 +566,273 @@ static const struct akcipher_testvec rsa_tv_template[] = { } }; +/* + * ECDSA test vectors. + */ +static const struct akcipher_testvec ecdsa_nist_p192_tv_template[] = { + { + .key = + "\x04\xf7\x46\xf8\x2f\x15\xf6\x22\x8e\xd7\x57\x4f\xcc\xe7\xbb\xc1" + "\xd4\x09\x73\xcf\xea\xd0\x15\x07\x3d\xa5\x8a\x8a\x95\x43\xe4\x68" + "\xea\xc6\x25\xc1\xc1\x01\x25\x4c\x7e\xc3\x3c\xa6\x04\x0a\xe7\x08" + "\x98", + .key_len = 49, + .params = + "\x30\x13\x06\x07\x2a\x86\x48\xce\x3d\x02\x01\x06\x08\x2a\x86\x48" + "\xce\x3d\x03\x01\x01", + .param_len = 21, + .m = + "\xcd\xb9\xd2\x1c\xb7\x6f\xcd\x44\xb3\xfd\x63\xea\xa3\x66\x7f\xae" + "\x63\x85\xe7\x82", + .m_size = 20, + .algo = OID_id_ecdsa_with_sha1, + .c = + "\x30\x35\x02\x19\x00\xba\xe5\x93\x83\x6e\xb6\x3b\x63\xa0\x27\x91" + "\xc6\xf6\x7f\xc3\x09\xad\x59\xad\x88\x27\xd6\x92\x6b\x02\x18\x10" + "\x68\x01\x9d\xba\xce\x83\x08\xef\x95\x52\x7b\xa0\x0f\xe4\x18\x86" + "\x80\x6f\xa5\x79\x77\xda\xd0", + .c_size = 55, + .public_key_vec = true, + .siggen_sigver_test = true, + }, { + .key = + "\x04\xb6\x4b\xb1\xd1\xac\xba\x24\x8f\x65\xb2\x60\x00\x90\xbf\xbd" + "\x78\x05\x73\xe9\x79\x1d\x6f\x7c\x0b\xd2\xc3\x93\xa7\x28\xe1\x75" + "\xf7\xd5\x95\x1d\x28\x10\xc0\x75\x50\x5c\x1a\x4f\x3f\x8f\xa5\xee" + "\xa3", + .key_len = 49, + .params = + "\x30\x13\x06\x07\x2a\x86\x48\xce\x3d\x02\x01\x06\x08\x2a\x86\x48" + "\xce\x3d\x03\x01\x01", + .param_len = 21, + .m = + "\x8d\xd6\xb8\x3e\xe5\xff\x23\xf6\x25\xa2\x43\x42\x74\x45\xa7\x40" + "\x3a\xff\x2f\xe1\xd3\xf6\x9f\xe8\x33\xcb\x12\x11", + .m_size = 28, + .algo = OID_id_ecdsa_with_sha224, + .c = + "\x30\x34\x02\x18\x5a\x8b\x82\x69\x7e\x8a\x0a\x09\x14\xf8\x11\x2b" + "\x55\xdc\xae\x37\x83\x7b\x12\xe6\xb6\x5b\xcb\xd4\x02\x18\x6a\x14" + "\x4f\x53\x75\xc8\x02\x48\xeb\xc3\x92\x0f\x1e\x72\xee\xc4\xa3\xe3" + "\x5c\x99\xdb\x92\x5b\x36", + .c_size = 54, + .public_key_vec = true, + .siggen_sigver_test = true, + }, { + .key = + "\x04\xe2\x51\x24\x9b\xf7\xb6\x32\x82\x39\x66\x3d\x5b\xec\x3b\xae" + "\x0c\xd5\xf2\x67\xd1\xc7\xe1\x02\xe4\xbf\x90\x62\xb8\x55\x75\x56" + "\x69\x20\x5e\xcb\x4e\xca\x33\xd6\xcb\x62\x6b\x94\xa9\xa2\xe9\x58" + "\x91", + .key_len = 49, + .params = + "\x30\x13\x06\x07\x2a\x86\x48\xce\x3d\x02\x01\x06\x08\x2a\x86\x48" + "\xce\x3d\x03\x01\x01", + .param_len = 21, + .m = + "\x35\xec\xa1\xa0\x9e\x14\xde\x33\x03\xb6\xf6\xbd\x0c\x2f\xb2\xfd" + "\x1f\x27\x82\xa5\xd7\x70\x3f\xef\xa0\x82\x69\x8e\x73\x31\x8e\xd7", + .m_size = 32, + .algo = OID_id_ecdsa_with_sha256, + .c = + "\x30\x35\x02\x18\x3f\x72\x3f\x1f\x42\xd2\x3f\x1d\x6b\x1a\x58\x56" + "\xf1\x8f\xf7\xfd\x01\x48\xfb\x5f\x72\x2a\xd4\x8f\x02\x19\x00\xb3" + "\x69\x43\xfd\x48\x19\x86\xcf\x32\xdd\x41\x74\x6a\x51\xc7\xd9\x7d" + "\x3a\x97\xd9\xcd\x1a\x6a\x49", + .c_size = 55, + .public_key_vec = true, + .siggen_sigver_test = true, + }, { + .key = + "\x04\x5a\x13\xfe\x68\x86\x4d\xf4\x17\xc7\xa4\xe5\x8c\x65\x57\xb7" + "\x03\x73\x26\x57\xfb\xe5\x58\x40\xd8\xfd\x49\x05\xab\xf1\x66\x1f" + "\xe2\x9d\x93\x9e\xc2\x22\x5a\x8b\x4f\xf3\x77\x22\x59\x7e\xa6\x4e" + "\x8b", + .key_len = 49, + .params = + "\x30\x13\x06\x07\x2a\x86\x48\xce\x3d\x02\x01\x06\x08\x2a\x86\x48" + "\xce\x3d\x03\x01\x01", + .param_len = 21, + .m = + "\x9d\x2e\x1a\x8f\xed\x6c\x4b\x61\xae\xac\xd5\x19\x79\xce\x67\xf9" + "\xa0\x34\xeb\xb0\x81\xf9\xd9\xdc\x6e\xb3\x5c\xa8\x69\xfc\x8a\x61" + "\x39\x81\xfb\xfd\x5c\x30\x6b\xa8\xee\xed\x89\xaf\xa3\x05\xe4\x78", + .m_size = 48, + .algo = OID_id_ecdsa_with_sha384, + .c = + "\x30\x35\x02\x19\x00\xf0\xa3\x38\xce\x2b\xf8\x9d\x1a\xcf\x7f\x34" + "\xb4\xb4\xe5\xc5\x00\xdd\x15\xbb\xd6\x8c\xa7\x03\x78\x02\x18\x64" + "\xbc\x5a\x1f\x82\x96\x61\xd7\xd1\x01\x77\x44\x5d\x53\xa4\x7c\x93" + "\x12\x3b\x3b\x28\xfb\x6d\xe1", + .c_size = 55, + .public_key_vec = true, + .siggen_sigver_test = true, + }, { + .key = + "\x04\xd5\xf2\x6e\xc3\x94\x5c\x52\xbc\xdf\x86\x6c\x14\xd1\xca\xea" + "\xcc\x72\x3a\x8a\xf6\x7a\x3a\x56\x36\x3b\xca\xc6\x94\x0e\x17\x1d" + "\x9e\xa0\x58\x28\xf9\x4b\xe6\xd1\xa5\x44\x91\x35\x0d\xe7\xf5\x11" + "\x57", + .key_len = 49, + .params = + "\x30\x13\x06\x07\x2a\x86\x48\xce\x3d\x02\x01\x06\x08\x2a\x86\x48" + "\xce\x3d\x03\x01\x01", + .param_len = 21, + .m = + "\xd5\x4b\xe9\x36\xda\xd8\x6e\xc0\x50\x03\xbe\x00\x43\xff\xf0\x23" + "\xac\xa2\x42\xe7\x37\x77\x79\x52\x8f\x3e\xc0\x16\xc1\xfc\x8c\x67" + "\x16\xbc\x8a\x5d\x3b\xd3\x13\xbb\xb6\xc0\x26\x1b\xeb\x33\xcc\x70" + "\x4a\xf2\x11\x37\xe8\x1b\xba\x55\xac\x69\xe1\x74\x62\x7c\x6e\xb5", + .m_size = 64, + .algo = OID_id_ecdsa_with_sha512, + .c = + "\x30\x35\x02\x19\x00\x88\x5b\x8f\x59\x43\xbf\xcf\xc6\xdd\x3f\x07" + "\x87\x12\xa0\xd4\xac\x2b\x11\x2d\x1c\xb6\x06\xc9\x6c\x02\x18\x73" + "\xb4\x22\x9a\x98\x73\x3c\x83\xa9\x14\x2a\x5e\xf5\xe5\xfb\x72\x28" + "\x6a\xdf\x97\xfd\x82\x76\x24", + .c_size = 55, + .public_key_vec = true, + .siggen_sigver_test = true, + }, +}; + +static const struct akcipher_testvec ecdsa_nist_p256_tv_template[] = { + { + .key = + "\x04\xb9\x7b\xbb\xd7\x17\x64\xd2\x7e\xfc\x81\x5d\x87\x06\x83\x41" + "\x22\xd6\x9a\xaa\x87\x17\xec\x4f\x63\x55\x2f\x94\xba\xdd\x83\xe9" + "\x34\x4b\xf3\xe9\x91\x13\x50\xb6\xcb\xca\x62\x08\xe7\x3b\x09\xdc" + "\xc3\x63\x4b\x2d\xb9\x73\x53\xe4\x45\xe6\x7c\xad\xe7\x6b\xb0\xe8" + "\xaf", + .key_len = 65, + .params = + "\x30\x13\x06\x07\x2a\x86\x48\xce\x3d\x02\x01\x06\x08\x2a\x86\x48" + "\xce\x3d\x03\x01\x07", + .param_len = 21, + .m = + "\xc2\x2b\x5f\x91\x78\x34\x26\x09\x42\x8d\x6f\x51\xb2\xc5\xaf\x4c" + "\x0b\xde\x6a\x42", + .m_size = 20, + .algo = OID_id_ecdsa_with_sha1, + .c = + "\x30\x46\x02\x21\x00\xf9\x25\xce\x9f\x3a\xa6\x35\x81\xcf\xd4\xe7" + "\xb7\xf0\x82\x56\x41\xf7\xd4\xad\x8d\x94\x5a\x69\x89\xee\xca\x6a" + "\x52\x0e\x48\x4d\xcc\x02\x21\x00\xd7\xe4\xef\x52\x66\xd3\x5b\x9d" + "\x8a\xfa\x54\x93\x29\xa7\x70\x86\xf1\x03\x03\xf3\x3b\xe2\x73\xf7" + "\xfb\x9d\x8b\xde\xd4\x8d\x6f\xad", + .c_size = 72, + .public_key_vec = true, + .siggen_sigver_test = true, + }, { + .key = + "\x04\x8b\x6d\xc0\x33\x8e\x2d\x8b\x67\xf5\xeb\xc4\x7f\xa0\xf5\xd9" + "\x7b\x03\xa5\x78\x9a\xb5\xea\x14\xe4\x23\xd0\xaf\xd7\x0e\x2e\xa0" + "\xc9\x8b\xdb\x95\xf8\xb3\xaf\xac\x00\x2c\x2c\x1f\x7a\xfd\x95\x88" + "\x43\x13\xbf\xf3\x1c\x05\x1a\x14\x18\x09\x3f\xd6\x28\x3e\xc5\xa0" + "\xd4", + .key_len = 65, + .params = + "\x30\x13\x06\x07\x2a\x86\x48\xce\x3d\x02\x01\x06\x08\x2a\x86\x48" + "\xce\x3d\x03\x01\x07", + .param_len = 21, + .m = + "\x1a\x15\xbc\xa3\xe4\xed\x3a\xb8\x23\x67\xc6\xc4\x34\xf8\x6c\x41" + "\x04\x0b\xda\xc5\x77\xfa\x1c\x2d\xe6\x2c\x3b\xe0", + .m_size = 28, + .algo = OID_id_ecdsa_with_sha224, + .c = + "\x30\x44\x02\x20\x20\x43\xfa\xc0\x9f\x9d\x7b\xe7\xae\xce\x77\x59" + "\x1a\xdb\x59\xd5\x34\x62\x79\xcb\x6a\x91\x67\x2e\x7d\x25\xd8\x25" + "\xf5\x81\xd2\x1e\x02\x20\x5f\xf8\x74\xf8\x57\xd0\x5e\x54\x76\x20" + "\x4a\x77\x22\xec\xc8\x66\xbf\x50\x05\x58\x39\x0e\x26\x92\xce\xd5" + "\x2e\x8b\xde\x5a\x04\x0e", + .c_size = 70, + .public_key_vec = true, + .siggen_sigver_test = true, + }, { + .key = + "\x04\xf1\xea\xc4\x53\xf3\xb9\x0e\x9f\x7e\xad\xe3\xea\xd7\x0e\x0f" + "\xd6\x98\x9a\xca\x92\x4d\x0a\x80\xdb\x2d\x45\xc7\xec\x4b\x97\x00" + "\x2f\xe9\x42\x6c\x29\xdc\x55\x0e\x0b\x53\x12\x9b\x2b\xad\x2c\xe9" + "\x80\xe6\xc5\x43\xc2\x1d\x5e\xbb\x65\x21\x50\xb6\x37\xb0\x03\x8e" + "\xb8", + .key_len = 65, + .params = + "\x30\x13\x06\x07\x2a\x86\x48\xce\x3d\x02\x01\x06\x08\x2a\x86\x48" + "\xce\x3d\x03\x01\x07", + .param_len = 21, + .m = + "\x8f\x43\x43\x46\x64\x8f\x6b\x96\xdf\x89\xdd\xa9\x01\xc5\x17\x6b" + "\x10\xa6\xd8\x39\x61\xdd\x3c\x1a\xc8\x8b\x59\xb2\xdc\x32\x7a\xa4", + .m_size = 32, + .algo = OID_id_ecdsa_with_sha256, + .c = + "\x30\x45\x02\x20\x08\x31\xfa\x74\x0d\x1d\x21\x5d\x09\xdc\x29\x63" + "\xa8\x1a\xad\xfc\xac\x44\xc3\xe8\x24\x11\x2d\xa4\x91\xdc\x02\x67" + "\xdc\x0c\xd0\x82\x02\x21\x00\xbd\xff\xce\xee\x42\xc3\x97\xff\xf9" + "\xa9\x81\xac\x4a\x50\xd0\x91\x0a\x6e\x1b\xc4\xaf\xe1\x83\xc3\x4f" + "\x2a\x65\x35\x23\xe3\x1d\xfa", + .c_size = 71, + .public_key_vec = true, + .siggen_sigver_test = true, + }, { + .key = + "\x04\xc5\xc6\xea\x60\xc9\xce\xad\x02\x8d\xf5\x3e\x24\xe3\x52\x1d" + "\x28\x47\x3b\xc3\x6b\xa4\x99\x35\x99\x11\x88\x88\xc8\xf4\xee\x7e" + "\x8c\x33\x8f\x41\x03\x24\x46\x2b\x1a\x82\xf9\x9f\xe1\x97\x1b\x00" + "\xda\x3b\x24\x41\xf7\x66\x33\x58\x3d\x3a\x81\xad\xcf\x16\xe9\xe2" + "\x7c", + .key_len = 65, + .params = + "\x30\x13\x06\x07\x2a\x86\x48\xce\x3d\x02\x01\x06\x08\x2a\x86\x48" + "\xce\x3d\x03\x01\x07", + .param_len = 21, + .m = + "\x3e\x78\x70\xfb\xcd\x66\xba\x91\xa1\x79\xff\x1e\x1c\x6b\x78\xe6" + "\xc0\x81\x3a\x65\x97\x14\x84\x36\x14\x1a\x9a\xb7\xc5\xab\x84\x94" + "\x5e\xbb\x1b\x34\x71\xcb\x41\xe1\xf6\xfc\x92\x7b\x34\xbb\x86\xbb", + .m_size = 48, + .algo = OID_id_ecdsa_with_sha384, + .c = + "\x30\x46\x02\x21\x00\x8e\xf3\x6f\xdc\xf8\x69\xa6\x2e\xd0\x2e\x95" + "\x54\xd1\x95\x64\x93\x08\xb2\x6b\x24\x94\x48\x46\x5e\xf2\xe4\x6c" + "\xc7\x94\xb1\xd5\xfe\x02\x21\x00\xeb\xa7\x80\x26\xdc\xf9\x3a\x44" + "\x19\xfb\x5f\x92\xf4\xc9\x23\x37\x69\xf4\x3b\x4f\x47\xcf\x9b\x16" + "\xc0\x60\x11\x92\xdc\x17\x89\x12", + .c_size = 72, + .public_key_vec = true, + .siggen_sigver_test = true, + }, { + .key = + "\x04\xd7\x27\x46\x49\xf6\x26\x85\x12\x40\x76\x8e\xe2\xe6\x2a\x7a" + "\x83\xb1\x4e\x7a\xeb\x3b\x5c\x67\x4a\xb5\xa4\x92\x8c\x69\xff\x38" + "\xee\xd9\x4e\x13\x29\x59\xad\xde\x6b\xbb\x45\x31\xee\xfd\xd1\x1b" + "\x64\xd3\xb5\xfc\xaf\x9b\x4b\x88\x3b\x0e\xb7\xd6\xdf\xf1\xd5\x92" + "\xbf", + .key_len = 65, + .params = + "\x30\x13\x06\x07\x2a\x86\x48\xce\x3d\x02\x01\x06\x08\x2a\x86\x48" + "\xce\x3d\x03\x01\x07", + .param_len = 21, + .m = + "\x57\xb7\x9e\xe9\x05\x0a\x8c\x1b\xc9\x13\xe5\x4a\x24\xc7\xe2\xe9" + "\x43\xc3\xd1\x76\x62\xf4\x98\x1a\x9c\x13\xb0\x20\x1b\xe5\x39\xca" + "\x4f\xd9\x85\x34\x95\xa2\x31\xbc\xbb\xde\xdd\x76\xbb\x61\xe3\xcf" + "\x9d\xc0\x49\x7a\xf3\x7a\xc4\x7d\xa8\x04\x4b\x8d\xb4\x4d\x5b\xd6", + .m_size = 64, + .algo = OID_id_ecdsa_with_sha512, + .c = + "\x30\x45\x02\x21\x00\xb8\x6d\x87\x81\x43\xdf\xfb\x9f\x40\xea\x44" + "\x81\x00\x4e\x29\x08\xed\x8c\x73\x30\x6c\x22\xb3\x97\x76\xf6\x04" + "\x99\x09\x37\x4d\xfa\x02\x20\x1e\xb9\x75\x31\xf6\x04\xa5\x4d\xf8" + "\x00\xdd\xab\xd4\xc0\x2b\xe6\x5c\xad\xc3\x78\x1c\xc2\xc1\x19\x76" + "\x31\x79\x4a\xe9\x81\x6a\xee", + .c_size = 71, + .public_key_vec = true, + .siggen_sigver_test = true, + }, +}; + /* * EC-RDSA test vectors are generated by gost-engine. */ From patchwork Tue Mar 16 21:07:34 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Stefan 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linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org, patrick@puiterwijk.org, Saulo Alessandre , Stefan Berger Subject: [PATCH v12 04/10] crypto: Add math to support fast NIST P384 Date: Tue, 16 Mar 2021 17:07:34 -0400 Message-Id: <20210316210740.1592994-5-stefanb@linux.ibm.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210316210740.1592994-1-stefanb@linux.ibm.com> References: <20210316210740.1592994-1-stefanb@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.369, 18.0.761 definitions=2021-03-16_08:2021-03-16,2021-03-16 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 mlxscore=0 priorityscore=1501 malwarescore=0 mlxlogscore=999 spamscore=0 clxscore=1015 bulkscore=0 adultscore=0 impostorscore=0 lowpriorityscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2103160135 Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org From: Saulo Alessandre Add the math needed for NIST P384 and adapt certain functions' parameters so that the ecc_curve is passed to vli_mmod_fast. This allows to identify the curve by its name prefix and the appropriate function for fast mmod calculation can be used. Summary of changes: * crypto/ecc.c - add vli_mmod_fast_384 - change some routines to pass ecc_curve forward until vli_mmod_fast * crypto/ecc.h - add ECC_CURVE_NIST_P384_DIGITS - change ECC_MAX_DIGITS to P384 size Signed-off-by: Saulo Alessandre Tested-by: Stefan Berger --- crypto/ecc.c | 266 +++++++++++++++++++++++++++++++++++++-------------- crypto/ecc.h | 3 +- 2 files changed, 194 insertions(+), 75 deletions(-) diff --git a/crypto/ecc.c b/crypto/ecc.c index f6cef5a7942d..589831d82063 100644 --- a/crypto/ecc.c +++ b/crypto/ecc.c @@ -778,18 +778,133 @@ static void vli_mmod_fast_256(u64 *result, const u64 *product, } } +#define SL32OR32(x32, y32) (((u64)x32 << 32) | y32) +#define AND64H(x64) (x64 & 0xffFFffFF00000000ull) +#define AND64L(x64) (x64 & 0x00000000ffFFffFFull) + +/* Computes result = product % curve_prime + * from "Mathematical routines for the NIST prime elliptic curves" + */ +static void vli_mmod_fast_384(u64 *result, const u64 *product, + const u64 *curve_prime, u64 *tmp) +{ + int carry; + const unsigned int ndigits = 6; + + /* t */ + vli_set(result, product, ndigits); + + /* s1 */ + tmp[0] = 0; // 0 || 0 + tmp[1] = 0; // 0 || 0 + tmp[2] = SL32OR32(product[11], (product[10]>>32)); //a22||a21 + tmp[3] = product[11]>>32; // 0 ||a23 + tmp[4] = 0; // 0 || 0 + tmp[5] = 0; // 0 || 0 + carry = vli_lshift(tmp, tmp, 1, ndigits); + carry += vli_add(result, result, tmp, ndigits); + + /* s2 */ + tmp[0] = product[6]; //a13||a12 + tmp[1] = product[7]; //a15||a14 + tmp[2] = product[8]; //a17||a16 + tmp[3] = product[9]; //a19||a18 + tmp[4] = product[10]; //a21||a20 + tmp[5] = product[11]; //a23||a22 + carry += vli_add(result, result, tmp, ndigits); + + /* s3 */ + tmp[0] = SL32OR32(product[11], (product[10]>>32)); //a22||a21 + tmp[1] = SL32OR32(product[6], (product[11]>>32)); //a12||a23 + tmp[2] = SL32OR32(product[7], (product[6])>>32); //a14||a13 + tmp[3] = SL32OR32(product[8], (product[7]>>32)); //a16||a15 + tmp[4] = SL32OR32(product[9], (product[8]>>32)); //a18||a17 + tmp[5] = SL32OR32(product[10], (product[9]>>32)); //a20||a19 + carry += vli_add(result, result, tmp, ndigits); + + /* s4 */ + tmp[0] = AND64H(product[11]); //a23|| 0 + tmp[1] = (product[10]<<32); //a20|| 0 + tmp[2] = product[6]; //a13||a12 + tmp[3] = product[7]; //a15||a14 + tmp[4] = product[8]; //a17||a16 + tmp[5] = product[9]; //a19||a18 + carry += vli_add(result, result, tmp, ndigits); + + /* s5 */ + tmp[0] = 0; // 0|| 0 + tmp[1] = 0; // 0|| 0 + tmp[2] = product[10]; //a21||a20 + tmp[3] = product[11]; //a23||a22 + tmp[4] = 0; // 0|| 0 + tmp[5] = 0; // 0|| 0 + carry += vli_add(result, result, tmp, ndigits); + + /* s6 */ + tmp[0] = AND64L(product[10]); // 0 ||a20 + tmp[1] = AND64H(product[10]); //a21|| 0 + tmp[2] = product[11]; //a23||a22 + tmp[3] = 0; // 0 || 0 + tmp[4] = 0; // 0 || 0 + tmp[5] = 0; // 0 || 0 + carry += vli_add(result, result, tmp, ndigits); + + /* d1 */ + tmp[0] = SL32OR32(product[6], (product[11]>>32)); //a12||a23 + tmp[1] = SL32OR32(product[7], (product[6]>>32)); //a14||a13 + tmp[2] = SL32OR32(product[8], (product[7]>>32)); //a16||a15 + tmp[3] = SL32OR32(product[9], (product[8]>>32)); //a18||a17 + tmp[4] = SL32OR32(product[10], (product[9]>>32)); //a20||a19 + tmp[5] = SL32OR32(product[11], (product[10]>>32)); //a22||a21 + carry -= vli_sub(result, result, tmp, ndigits); + + /* d2 */ + tmp[0] = (product[10]<<32); //a20|| 0 + tmp[1] = SL32OR32(product[11], (product[10]>>32)); //a22||a21 + tmp[2] = (product[11]>>32); // 0 ||a23 + tmp[3] = 0; // 0 || 0 + tmp[4] = 0; // 0 || 0 + tmp[5] = 0; // 0 || 0 + carry -= vli_sub(result, result, tmp, ndigits); + + /* d3 */ + tmp[0] = 0; // 0 || 0 + tmp[1] = AND64H(product[11]); //a23|| 0 + tmp[2] = product[11]>>32; // 0 ||a23 + tmp[3] = 0; // 0 || 0 + tmp[4] = 0; // 0 || 0 + tmp[5] = 0; // 0 || 0 + carry -= vli_sub(result, result, tmp, ndigits); + + if (carry < 0) { + do { + carry += vli_add(result, result, curve_prime, ndigits); + } while (carry < 0); + } else { + while (carry || vli_cmp(curve_prime, result, ndigits) != 1) + carry -= vli_sub(result, result, curve_prime, ndigits); + } + +} + +#undef SL32OR32 +#undef AND64H +#undef AND64L + /* Computes result = product % curve_prime for different curve_primes. * * Note that curve_primes are distinguished just by heuristic check and * not by complete conformance check. */ static bool vli_mmod_fast(u64 *result, u64 *product, - const u64 *curve_prime, unsigned int ndigits) + const struct ecc_curve *curve) { u64 tmp[2 * ECC_MAX_DIGITS]; + const u64 *curve_prime = curve->p; + const unsigned int ndigits = curve->g.ndigits; - /* Currently, both NIST primes have -1 in lowest qword. */ - if (curve_prime[0] != -1ull) { + /* All NIST curves have name prefix 'nist_' */ + if (strncmp(curve->name, "nist_", 5) != 0) { /* Try to handle Pseudo-Marsenne primes. */ if (curve_prime[ndigits - 1] == -1ull) { vli_mmod_special(result, product, curve_prime, @@ -812,6 +927,9 @@ static bool vli_mmod_fast(u64 *result, u64 *product, case 4: vli_mmod_fast_256(result, product, curve_prime, tmp); break; + case 6: + vli_mmod_fast_384(result, product, curve_prime, tmp); + break; default: pr_err_ratelimited("ecc: unsupported digits size!\n"); return false; @@ -835,22 +953,22 @@ EXPORT_SYMBOL(vli_mod_mult_slow); /* Computes result = (left * right) % curve_prime. */ static void vli_mod_mult_fast(u64 *result, const u64 *left, const u64 *right, - const u64 *curve_prime, unsigned int ndigits) + const struct ecc_curve *curve) { u64 product[2 * ECC_MAX_DIGITS]; - vli_mult(product, left, right, ndigits); - vli_mmod_fast(result, product, curve_prime, ndigits); + vli_mult(product, left, right, curve->g.ndigits); + vli_mmod_fast(result, product, curve); } /* Computes result = left^2 % curve_prime. */ static void vli_mod_square_fast(u64 *result, const u64 *left, - const u64 *curve_prime, unsigned int ndigits) + const struct ecc_curve *curve) { u64 product[2 * ECC_MAX_DIGITS]; - vli_square(product, left, ndigits); - vli_mmod_fast(result, product, curve_prime, ndigits); + vli_square(product, left, curve->g.ndigits); + vli_mmod_fast(result, product, curve); } #define EVEN(vli) (!(vli[0] & 1)) @@ -948,25 +1066,27 @@ static bool ecc_point_is_zero(const struct ecc_point *point) /* Double in place */ static void ecc_point_double_jacobian(u64 *x1, u64 *y1, u64 *z1, - u64 *curve_prime, unsigned int ndigits) + const struct ecc_curve *curve) { /* t1 = x, t2 = y, t3 = z */ u64 t4[ECC_MAX_DIGITS]; u64 t5[ECC_MAX_DIGITS]; + const u64 *curve_prime = curve->p; + const unsigned int ndigits = curve->g.ndigits; if (vli_is_zero(z1, ndigits)) return; /* t4 = y1^2 */ - vli_mod_square_fast(t4, y1, curve_prime, ndigits); + vli_mod_square_fast(t4, y1, curve); /* t5 = x1*y1^2 = A */ - vli_mod_mult_fast(t5, x1, t4, curve_prime, ndigits); + vli_mod_mult_fast(t5, x1, t4, curve); /* t4 = y1^4 */ - vli_mod_square_fast(t4, t4, curve_prime, ndigits); + vli_mod_square_fast(t4, t4, curve); /* t2 = y1*z1 = z3 */ - vli_mod_mult_fast(y1, y1, z1, curve_prime, ndigits); + vli_mod_mult_fast(y1, y1, z1, curve); /* t3 = z1^2 */ - vli_mod_square_fast(z1, z1, curve_prime, ndigits); + vli_mod_square_fast(z1, z1, curve); /* t1 = x1 + z1^2 */ vli_mod_add(x1, x1, z1, curve_prime, ndigits); @@ -975,7 +1095,7 @@ static void ecc_point_double_jacobian(u64 *x1, u64 *y1, u64 *z1, /* t3 = x1 - z1^2 */ vli_mod_sub(z1, x1, z1, curve_prime, ndigits); /* t1 = x1^2 - z1^4 */ - vli_mod_mult_fast(x1, x1, z1, curve_prime, ndigits); + vli_mod_mult_fast(x1, x1, z1, curve); /* t3 = 2*(x1^2 - z1^4) */ vli_mod_add(z1, x1, x1, curve_prime, ndigits); @@ -992,7 +1112,7 @@ static void ecc_point_double_jacobian(u64 *x1, u64 *y1, u64 *z1, /* t1 = 3/2*(x1^2 - z1^4) = B */ /* t3 = B^2 */ - vli_mod_square_fast(z1, x1, curve_prime, ndigits); + vli_mod_square_fast(z1, x1, curve); /* t3 = B^2 - A */ vli_mod_sub(z1, z1, t5, curve_prime, ndigits); /* t3 = B^2 - 2A = x3 */ @@ -1000,7 +1120,7 @@ static void ecc_point_double_jacobian(u64 *x1, u64 *y1, u64 *z1, /* t5 = A - x3 */ vli_mod_sub(t5, t5, z1, curve_prime, ndigits); /* t1 = B * (A - x3) */ - vli_mod_mult_fast(x1, x1, t5, curve_prime, ndigits); + vli_mod_mult_fast(x1, x1, t5, curve); /* t4 = B * (A - x3) - y1^4 = y3 */ vli_mod_sub(t4, x1, t4, curve_prime, ndigits); @@ -1010,23 +1130,22 @@ static void ecc_point_double_jacobian(u64 *x1, u64 *y1, u64 *z1, } /* Modify (x1, y1) => (x1 * z^2, y1 * z^3) */ -static void apply_z(u64 *x1, u64 *y1, u64 *z, u64 *curve_prime, - unsigned int ndigits) +static void apply_z(u64 *x1, u64 *y1, u64 *z, const struct ecc_curve *curve) { u64 t1[ECC_MAX_DIGITS]; - vli_mod_square_fast(t1, z, curve_prime, ndigits); /* z^2 */ - vli_mod_mult_fast(x1, x1, t1, curve_prime, ndigits); /* x1 * z^2 */ - vli_mod_mult_fast(t1, t1, z, curve_prime, ndigits); /* z^3 */ - vli_mod_mult_fast(y1, y1, t1, curve_prime, ndigits); /* y1 * z^3 */ + vli_mod_square_fast(t1, z, curve); /* z^2 */ + vli_mod_mult_fast(x1, x1, t1, curve); /* x1 * z^2 */ + vli_mod_mult_fast(t1, t1, z, curve); /* z^3 */ + vli_mod_mult_fast(y1, y1, t1, curve); /* y1 * z^3 */ } /* P = (x1, y1) => 2P, (x2, y2) => P' */ static void xycz_initial_double(u64 *x1, u64 *y1, u64 *x2, u64 *y2, - u64 *p_initial_z, u64 *curve_prime, - unsigned int ndigits) + u64 *p_initial_z, const struct ecc_curve *curve) { u64 z[ECC_MAX_DIGITS]; + const unsigned int ndigits = curve->g.ndigits; vli_set(x2, x1, ndigits); vli_set(y2, y1, ndigits); @@ -1037,35 +1156,37 @@ static void xycz_initial_double(u64 *x1, u64 *y1, u64 *x2, u64 *y2, if (p_initial_z) vli_set(z, p_initial_z, ndigits); - apply_z(x1, y1, z, curve_prime, ndigits); + apply_z(x1, y1, z, curve); - ecc_point_double_jacobian(x1, y1, z, curve_prime, ndigits); + ecc_point_double_jacobian(x1, y1, z, curve); - apply_z(x2, y2, z, curve_prime, ndigits); + apply_z(x2, y2, z, curve); } /* Input P = (x1, y1, Z), Q = (x2, y2, Z) * Output P' = (x1', y1', Z3), P + Q = (x3, y3, Z3) * or P => P', Q => P + Q */ -static void xycz_add(u64 *x1, u64 *y1, u64 *x2, u64 *y2, u64 *curve_prime, - unsigned int ndigits) +static void xycz_add(u64 *x1, u64 *y1, u64 *x2, u64 *y2, + const struct ecc_curve *curve) { /* t1 = X1, t2 = Y1, t3 = X2, t4 = Y2 */ u64 t5[ECC_MAX_DIGITS]; + const u64 *curve_prime = curve->p; + const unsigned int ndigits = curve->g.ndigits; /* t5 = x2 - x1 */ vli_mod_sub(t5, x2, x1, curve_prime, ndigits); /* t5 = (x2 - x1)^2 = A */ - vli_mod_square_fast(t5, t5, curve_prime, ndigits); + vli_mod_square_fast(t5, t5, curve); /* t1 = x1*A = B */ - vli_mod_mult_fast(x1, x1, t5, curve_prime, ndigits); + vli_mod_mult_fast(x1, x1, t5, curve); /* t3 = x2*A = C */ - vli_mod_mult_fast(x2, x2, t5, curve_prime, ndigits); + vli_mod_mult_fast(x2, x2, t5, curve); /* t4 = y2 - y1 */ vli_mod_sub(y2, y2, y1, curve_prime, ndigits); /* t5 = (y2 - y1)^2 = D */ - vli_mod_square_fast(t5, y2, curve_prime, ndigits); + vli_mod_square_fast(t5, y2, curve); /* t5 = D - B */ vli_mod_sub(t5, t5, x1, curve_prime, ndigits); @@ -1074,11 +1195,11 @@ static void xycz_add(u64 *x1, u64 *y1, u64 *x2, u64 *y2, u64 *curve_prime, /* t3 = C - B */ vli_mod_sub(x2, x2, x1, curve_prime, ndigits); /* t2 = y1*(C - B) */ - vli_mod_mult_fast(y1, y1, x2, curve_prime, ndigits); + vli_mod_mult_fast(y1, y1, x2, curve); /* t3 = B - x3 */ vli_mod_sub(x2, x1, t5, curve_prime, ndigits); /* t4 = (y2 - y1)*(B - x3) */ - vli_mod_mult_fast(y2, y2, x2, curve_prime, ndigits); + vli_mod_mult_fast(y2, y2, x2, curve); /* t4 = y3 */ vli_mod_sub(y2, y2, y1, curve_prime, ndigits); @@ -1089,22 +1210,24 @@ static void xycz_add(u64 *x1, u64 *y1, u64 *x2, u64 *y2, u64 *curve_prime, * Output P + Q = (x3, y3, Z3), P - Q = (x3', y3', Z3) * or P => P - Q, Q => P + Q */ -static void xycz_add_c(u64 *x1, u64 *y1, u64 *x2, u64 *y2, u64 *curve_prime, - unsigned int ndigits) +static void xycz_add_c(u64 *x1, u64 *y1, u64 *x2, u64 *y2, + const struct ecc_curve *curve) { /* t1 = X1, t2 = Y1, t3 = X2, t4 = Y2 */ u64 t5[ECC_MAX_DIGITS]; u64 t6[ECC_MAX_DIGITS]; u64 t7[ECC_MAX_DIGITS]; + const u64 *curve_prime = curve->p; + const unsigned int ndigits = curve->g.ndigits; /* t5 = x2 - x1 */ vli_mod_sub(t5, x2, x1, curve_prime, ndigits); /* t5 = (x2 - x1)^2 = A */ - vli_mod_square_fast(t5, t5, curve_prime, ndigits); + vli_mod_square_fast(t5, t5, curve); /* t1 = x1*A = B */ - vli_mod_mult_fast(x1, x1, t5, curve_prime, ndigits); + vli_mod_mult_fast(x1, x1, t5, curve); /* t3 = x2*A = C */ - vli_mod_mult_fast(x2, x2, t5, curve_prime, ndigits); + vli_mod_mult_fast(x2, x2, t5, curve); /* t4 = y2 + y1 */ vli_mod_add(t5, y2, y1, curve_prime, ndigits); /* t4 = y2 - y1 */ @@ -1113,29 +1236,29 @@ static void xycz_add_c(u64 *x1, u64 *y1, u64 *x2, u64 *y2, u64 *curve_prime, /* t6 = C - B */ vli_mod_sub(t6, x2, x1, curve_prime, ndigits); /* t2 = y1 * (C - B) */ - vli_mod_mult_fast(y1, y1, t6, curve_prime, ndigits); + vli_mod_mult_fast(y1, y1, t6, curve); /* t6 = B + C */ vli_mod_add(t6, x1, x2, curve_prime, ndigits); /* t3 = (y2 - y1)^2 */ - vli_mod_square_fast(x2, y2, curve_prime, ndigits); + vli_mod_square_fast(x2, y2, curve); /* t3 = x3 */ vli_mod_sub(x2, x2, t6, curve_prime, ndigits); /* t7 = B - x3 */ vli_mod_sub(t7, x1, x2, curve_prime, ndigits); /* t4 = (y2 - y1)*(B - x3) */ - vli_mod_mult_fast(y2, y2, t7, curve_prime, ndigits); + vli_mod_mult_fast(y2, y2, t7, curve); /* t4 = y3 */ vli_mod_sub(y2, y2, y1, curve_prime, ndigits); /* t7 = (y2 + y1)^2 = F */ - vli_mod_square_fast(t7, t5, curve_prime, ndigits); + vli_mod_square_fast(t7, t5, curve); /* t7 = x3' */ vli_mod_sub(t7, t7, t6, curve_prime, ndigits); /* t6 = x3' - B */ vli_mod_sub(t6, t7, x1, curve_prime, ndigits); /* t6 = (y2 + y1)*(x3' - B) */ - vli_mod_mult_fast(t6, t6, t5, curve_prime, ndigits); + vli_mod_mult_fast(t6, t6, t5, curve); /* t2 = y3' */ vli_mod_sub(y1, t6, y1, curve_prime, ndigits); @@ -1165,41 +1288,37 @@ static void ecc_point_mult(struct ecc_point *result, vli_set(rx[1], point->x, ndigits); vli_set(ry[1], point->y, ndigits); - xycz_initial_double(rx[1], ry[1], rx[0], ry[0], initial_z, curve_prime, - ndigits); + xycz_initial_double(rx[1], ry[1], rx[0], ry[0], initial_z, curve); for (i = num_bits - 2; i > 0; i--) { nb = !vli_test_bit(scalar, i); - xycz_add_c(rx[1 - nb], ry[1 - nb], rx[nb], ry[nb], curve_prime, - ndigits); - xycz_add(rx[nb], ry[nb], rx[1 - nb], ry[1 - nb], curve_prime, - ndigits); + xycz_add_c(rx[1 - nb], ry[1 - nb], rx[nb], ry[nb], curve); + xycz_add(rx[nb], ry[nb], rx[1 - nb], ry[1 - nb], curve); } nb = !vli_test_bit(scalar, 0); - xycz_add_c(rx[1 - nb], ry[1 - nb], rx[nb], ry[nb], curve_prime, - ndigits); + xycz_add_c(rx[1 - nb], ry[1 - nb], rx[nb], ry[nb], curve); /* Find final 1/Z value. */ /* X1 - X0 */ vli_mod_sub(z, rx[1], rx[0], curve_prime, ndigits); /* Yb * (X1 - X0) */ - vli_mod_mult_fast(z, z, ry[1 - nb], curve_prime, ndigits); + vli_mod_mult_fast(z, z, ry[1 - nb], curve); /* xP * Yb * (X1 - X0) */ - vli_mod_mult_fast(z, z, point->x, curve_prime, ndigits); + vli_mod_mult_fast(z, z, point->x, curve); /* 1 / (xP * Yb * (X1 - X0)) */ vli_mod_inv(z, z, curve_prime, point->ndigits); /* yP / (xP * Yb * (X1 - X0)) */ - vli_mod_mult_fast(z, z, point->y, curve_prime, ndigits); + vli_mod_mult_fast(z, z, point->y, curve); /* Xb * yP / (xP * Yb * (X1 - X0)) */ - vli_mod_mult_fast(z, z, rx[1 - nb], curve_prime, ndigits); + vli_mod_mult_fast(z, z, rx[1 - nb], curve); /* End 1/Z calculation */ - xycz_add(rx[nb], ry[nb], rx[1 - nb], ry[1 - nb], curve_prime, ndigits); + xycz_add(rx[nb], ry[nb], rx[1 - nb], ry[1 - nb], curve); - apply_z(rx[0], ry[0], z, curve_prime, ndigits); + apply_z(rx[0], ry[0], z, curve); vli_set(result->x, rx[0], ndigits); vli_set(result->y, ry[0], ndigits); @@ -1220,9 +1339,9 @@ static void ecc_point_add(const struct ecc_point *result, vli_mod_sub(z, result->x, p->x, curve->p, ndigits); vli_set(px, p->x, ndigits); vli_set(py, p->y, ndigits); - xycz_add(px, py, result->x, result->y, curve->p, ndigits); + xycz_add(px, py, result->x, result->y, curve); vli_mod_inv(z, z, curve->p, ndigits); - apply_z(result->x, result->y, z, curve->p, ndigits); + apply_z(result->x, result->y, z, curve); } /* Computes R = u1P + u2Q mod p using Shamir's trick. @@ -1251,8 +1370,7 @@ void ecc_point_mult_shamir(const struct ecc_point *result, points[2] = q; points[3] = ∑ - num_bits = max(vli_num_bits(u1, ndigits), - vli_num_bits(u2, ndigits)); + num_bits = max(vli_num_bits(u1, ndigits), vli_num_bits(u2, ndigits)); i = num_bits - 1; idx = (!!vli_test_bit(u1, i)) | ((!!vli_test_bit(u2, i)) << 1); point = points[idx]; @@ -1263,7 +1381,7 @@ void ecc_point_mult_shamir(const struct ecc_point *result, z[0] = 1; for (--i; i >= 0; i--) { - ecc_point_double_jacobian(rx, ry, z, curve->p, ndigits); + ecc_point_double_jacobian(rx, ry, z, curve); idx = (!!vli_test_bit(u1, i)) | ((!!vli_test_bit(u2, i)) << 1); point = points[idx]; if (point) { @@ -1273,14 +1391,14 @@ void ecc_point_mult_shamir(const struct ecc_point *result, vli_set(tx, point->x, ndigits); vli_set(ty, point->y, ndigits); - apply_z(tx, ty, z, curve->p, ndigits); + apply_z(tx, ty, z, curve); vli_mod_sub(tz, rx, tx, curve->p, ndigits); - xycz_add(tx, ty, rx, ry, curve->p, ndigits); - vli_mod_mult_fast(z, z, tz, curve->p, ndigits); + xycz_add(tx, ty, rx, ry, curve); + vli_mod_mult_fast(z, z, tz, curve); } } vli_mod_inv(z, z, curve->p, ndigits); - apply_z(rx, ry, z, curve->p, ndigits); + apply_z(rx, ry, z, curve); } EXPORT_SYMBOL(ecc_point_mult_shamir); @@ -1434,10 +1552,10 @@ int ecc_is_pubkey_valid_partial(const struct ecc_curve *curve, return -EINVAL; /* Check 3: Verify that y^2 == (x^3 + a·x + b) mod p */ - vli_mod_square_fast(yy, pk->y, curve->p, pk->ndigits); /* y^2 */ - vli_mod_square_fast(xxx, pk->x, curve->p, pk->ndigits); /* x^2 */ - vli_mod_mult_fast(xxx, xxx, pk->x, curve->p, pk->ndigits); /* x^3 */ - vli_mod_mult_fast(w, curve->a, pk->x, curve->p, pk->ndigits); /* a·x */ + vli_mod_square_fast(yy, pk->y, curve); /* y^2 */ + vli_mod_square_fast(xxx, pk->x, curve); /* x^2 */ + vli_mod_mult_fast(xxx, xxx, pk->x, curve); /* x^3 */ + vli_mod_mult_fast(w, curve->a, pk->x, curve); /* a·x */ vli_mod_add(w, w, curve->b, curve->p, pk->ndigits); /* a·x + b */ vli_mod_add(w, w, xxx, curve->p, pk->ndigits); /* x^3 + a·x + b */ if (vli_cmp(yy, w, pk->ndigits) != 0) /* Equation */ diff --git a/crypto/ecc.h b/crypto/ecc.h index e0e2aed0557a..3bee655d437d 100644 --- a/crypto/ecc.h +++ b/crypto/ecc.h @@ -29,7 +29,8 @@ /* One digit is u64 qword. */ #define ECC_CURVE_NIST_P192_DIGITS 3 #define ECC_CURVE_NIST_P256_DIGITS 4 -#define ECC_MAX_DIGITS (512 / 64) +#define ECC_CURVE_NIST_P384_DIGITS 6 +#define ECC_MAX_DIGITS (512 / 64) /* due to ecrdsa */ #define ECC_DIGITS_TO_BYTES_SHIFT 3 From patchwork Tue Mar 16 21:07:38 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Berger X-Patchwork-Id: 401844 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B705DC2BB4D for ; 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Tue, 16 Mar 2021 17:08:01 -0400 Received: from m0098419.ppops.net (m0098419.ppops.net [127.0.0.1]) by pps.reinject (8.16.0.43/8.16.0.43) with SMTP id 12GL54tY020442; Tue, 16 Mar 2021 17:08:00 -0400 Received: from ppma04wdc.us.ibm.com (1a.90.2fa9.ip4.static.sl-reverse.com [169.47.144.26]) by mx0b-001b2d01.pphosted.com with ESMTP id 37b0kr6dqk-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 16 Mar 2021 17:08:00 -0400 Received: from pps.filterd (ppma04wdc.us.ibm.com [127.0.0.1]) by ppma04wdc.us.ibm.com (8.16.0.43/8.16.0.43) with SMTP id 12GL7k20016646; Tue, 16 Mar 2021 21:07:59 GMT Received: from b03cxnp07027.gho.boulder.ibm.com (b03cxnp07027.gho.boulder.ibm.com [9.17.130.14]) by ppma04wdc.us.ibm.com with ESMTP id 378n1923yu-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 16 Mar 2021 21:07:59 +0000 Received: from b03ledav002.gho.boulder.ibm.com (b03ledav002.gho.boulder.ibm.com [9.17.130.233]) by b03cxnp07027.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 12GL7wUJ32440590 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 16 Mar 2021 21:07:58 GMT Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 26FD8136060; Tue, 16 Mar 2021 21:07:58 +0000 (GMT) Received: from b03ledav002.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2FEFC136055; Tue, 16 Mar 2021 21:07:57 +0000 (GMT) Received: from localhost.localdomain (unknown [9.47.158.152]) by b03ledav002.gho.boulder.ibm.com (Postfix) with ESMTP; Tue, 16 Mar 2021 21:07:57 +0000 (GMT) From: Stefan Berger To: keyrings@vger.kernel.org, linux-crypto@vger.kernel.org, davem@davemloft.net, herbert@gondor.apana.org.au, dhowells@redhat.com, zohar@linux.ibm.com, jarkko@kernel.org Cc: linux-integrity@vger.kernel.org, linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org, patrick@puiterwijk.org, Stefan Berger , Dmitry Kasatkin , Vitaly Chikunov , Tianjia Zhang Subject: [PATCH v12 08/10] ima: Support EC keys for signature verification Date: Tue, 16 Mar 2021 17:07:38 -0400 Message-Id: <20210316210740.1592994-9-stefanb@linux.ibm.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210316210740.1592994-1-stefanb@linux.ibm.com> References: <20210316210740.1592994-1-stefanb@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.369, 18.0.761 definitions=2021-03-16_08:2021-03-16,2021-03-16 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 lowpriorityscore=0 impostorscore=0 phishscore=0 mlxscore=0 bulkscore=0 mlxlogscore=999 adultscore=0 priorityscore=1501 suspectscore=0 malwarescore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2103160135 Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org Add support for IMA signature verification for EC keys. Since SHA type of hashes can be used by RSA and ECDSA signature schemes we need to look at the key and derive from the key which signature scheme to use. Since this can be applied to all types of keys, we change the selection of the encoding type to be driven by the key's signature scheme rather than by the hash type. Cc: Dmitry Kasatkin Cc: linux-integrity@vger.kernel.org Cc: David Howells Cc: keyrings@vger.kernel.org Signed-off-by: Stefan Berger Reviewed-by: Vitaly Chikunov Reviewed-by: Tianjia Zhang Acked-by: Mimi Zohar --- v7->v8: - use strncmp to check for 'ecdsa-' to match 'ecdsa-nist-p192' and 'ecdsa-nist-p256' key types; previously they were just 'ecdsa' --- include/keys/asymmetric-type.h | 6 ++++++ security/integrity/digsig_asymmetric.c | 30 ++++++++++++-------------- 2 files changed, 20 insertions(+), 16 deletions(-) diff --git a/include/keys/asymmetric-type.h b/include/keys/asymmetric-type.h index a29d3ff2e7e8..c432fdb8547f 100644 --- a/include/keys/asymmetric-type.h +++ b/include/keys/asymmetric-type.h @@ -72,6 +72,12 @@ const struct asymmetric_key_ids *asymmetric_key_ids(const struct key *key) return key->payload.data[asym_key_ids]; } +static inline +const struct public_key *asymmetric_key_public_key(const struct key *key) +{ + return key->payload.data[asym_crypto]; +} + extern struct key *find_asymmetric_key(struct key *keyring, const struct asymmetric_key_id *id_0, const struct asymmetric_key_id *id_1, diff --git a/security/integrity/digsig_asymmetric.c b/security/integrity/digsig_asymmetric.c index a662024b4c70..23240d793b07 100644 --- a/security/integrity/digsig_asymmetric.c +++ b/security/integrity/digsig_asymmetric.c @@ -84,6 +84,7 @@ int asymmetric_verify(struct key *keyring, const char *sig, { struct public_key_signature pks; struct signature_v2_hdr *hdr = (struct signature_v2_hdr *)sig; + const struct public_key *pk; struct key *key; int ret; @@ -105,23 +106,20 @@ int asymmetric_verify(struct key *keyring, const char *sig, memset(&pks, 0, sizeof(pks)); pks.hash_algo = hash_algo_name[hdr->hash_algo]; - switch (hdr->hash_algo) { - case HASH_ALGO_STREEBOG_256: - case HASH_ALGO_STREEBOG_512: - /* EC-RDSA and Streebog should go together. */ - pks.pkey_algo = "ecrdsa"; - pks.encoding = "raw"; - break; - case HASH_ALGO_SM3_256: - /* SM2 and SM3 should go together. */ - pks.pkey_algo = "sm2"; - pks.encoding = "raw"; - break; - default: - pks.pkey_algo = "rsa"; + + pk = asymmetric_key_public_key(key); + pks.pkey_algo = pk->pkey_algo; + if (!strcmp(pk->pkey_algo, "rsa")) pks.encoding = "pkcs1"; - break; - } + else if (!strncmp(pk->pkey_algo, "ecdsa-", 6)) + /* edcsa-nist-p192 etc. */ + pks.encoding = "x962"; + else if (!strcmp(pk->pkey_algo, "ecrdsa") || + !strcmp(pk->pkey_algo, "sm2")) + pks.encoding = "raw"; + else + return -ENOPKG; + pks.digest = (u8 *)data; pks.digest_size = datalen; pks.s = hdr->sig;