From patchwork Fri Feb 19 18:57:58 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Saulo Alessandre de Lima X-Patchwork-Id: 12096059 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=-10.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,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 D6001C43331 for ; Fri, 19 Feb 2021 18:59:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A10F464EB4 for ; Fri, 19 Feb 2021 18:59:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229889AbhBSS7B (ORCPT ); Fri, 19 Feb 2021 13:59:01 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44620 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229515AbhBSS67 (ORCPT ); Fri, 19 Feb 2021 13:58:59 -0500 Received: from mail-qk1-x735.google.com (mail-qk1-x735.google.com [IPv6:2607:f8b0:4864:20::735]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AAE7FC061786; Fri, 19 Feb 2021 10:58:19 -0800 (PST) Received: by mail-qk1-x735.google.com with SMTP id h8so6548083qkk.6; Fri, 19 Feb 2021 10:58:19 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=YXi545b3BQ0nvr+y48ksj2B/7TI2XjDM1gWbtRnw+yk=; b=pOOLgT5D8cPK6NThZ25rq6+ONmojrG2Co8Asva+abThvFXuqyIkTUwuoMJ/7w/Nn2O arqEkvRG5U61aOrcgfsi5i9RYGxYC+Hy5o6FtYD8ZLerEEBd2XRmMHyVJr0itQvPAFXZ QVo7T3wqGxWw8r86KvTyQaa7Iy0I3Tmv9XUhOcJczGZO8XpTIBp1ifgUOAp5iGhmnXiz BYBANZqcDTbQZVlgpQ5lBjdVSPRoHWnOG9gB8xZ5TYBCSEjQ1W0XW1Wd4h4lL2vntt0F F1sWrOkp5LjCFnZ6XuJjTxXejWNP8k6zCwRXRvIgKmcGX7k4gAjN1FBqKQTmfSqDk1Wf 5nWw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=YXi545b3BQ0nvr+y48ksj2B/7TI2XjDM1gWbtRnw+yk=; b=pGrjtnjXP3ZKpdxB1jDG8GPXm/kOdOBl6kNmj7Wyl2naosAfSOdmoenWhfMDPNXzvt 9J0yzKb5MR7zNEi2RGrg4aStpD1BXJBxqylVjlqbi2K8PErVpSJoznpZ1PF4Ga+Fl7+k 2a8c0gKAiP0SSduE6ktvJdBirqnA4Xph/rhM1UelGQDSlzxxHMZnJqeAK8OE884Ognci vYJvn7EaUvqtn6biOjtJbIKpeEVaKibpWXbKBrHyCyRj8fyJNZrVnyJobiOAJDt7Jy9k LVYFlGvLmZmo5zIfDsGVpt6+o2jLfDSZiAp9fhJsZ4lyTQsw+MaVldPDp5QkHMK4EDkB irUQ== X-Gm-Message-State: AOAM532oT4JFKA3h1ZklkATGzoKBfZZUVMzSt9A0bA4rElNMxWU72YSG Bwny/ZWoY5tcExeJ8pJemi8= X-Google-Smtp-Source: ABdhPJxEk03sRGZKDG205N+pyvaf77MNe4q2IAuefWEHpD+tLtsVyid30PzluLq/s2EwYrCU2FUGgg== X-Received: by 2002:a05:620a:22ed:: with SMTP id p13mr8494458qki.249.1613761098819; Fri, 19 Feb 2021 10:58:18 -0800 (PST) Received: from localhost.localdomain ([189.61.66.20]) by smtp.gmail.com with ESMTPSA id t54sm6109523qte.8.2021.02.19.10.58.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 19 Feb 2021 10:58:18 -0800 (PST) From: Saulo Alessandre To: stefanb@linux.ibm.com Cc: davem@davemloft.net, dhowells@redhat.com, herbert@gondor.apana.org.au, keyrings@vger.kernel.org, linux-crypto@vger.kernel.org, linux-integrity@vger.kernel.org, linux-kernel@vger.kernel.org, patrick@puiterwijk.org, zohar@linux.ibm.com, Saulo Alessandre Subject: [PATCH 2/3] add mathematic to support fast nist_p384 and change routines to pass forward ecc_curve Date: Fri, 19 Feb 2021 15:57:58 -0300 Message-Id: <20210219185759.1033764-2-saulo.alessandre@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210219185759.1033764-1-saulo.alessandre@gmail.com> References: <20210215162532.1077098-1-stefanb@linux.ibm.com> <20210219185759.1033764-1-saulo.alessandre@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: keyrings@vger.kernel.org From: Saulo Alessandre * crypto/ecc.c - change ecc_get_curve to accept nist_p384 - 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 --- crypto/ecc.c | 282 ++++++++++++++++++++++++++++++++++++--------------- crypto/ecc.h | 3 +- 2 files changed, 203 insertions(+), 82 deletions(-) diff --git a/crypto/ecc.c b/crypto/ecc.c index 25e79fd70566..aab57dcf26c6 100644 --- a/crypto/ecc.c +++ b/crypto/ecc.c @@ -50,6 +50,8 @@ const struct ecc_curve *ecc_get_curve(unsigned int curve_id) return fips_enabled ? NULL : &nist_p192; case ECC_CURVE_NIST_P256: return &nist_p256; + case ECC_CURVE_NIST_P384: + return &nist_p384; default: return NULL; } @@ -776,18 +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) { + /* Currently, all NIST have name 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, @@ -810,6 +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; @@ -833,22 +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)) @@ -946,25 +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); @@ -973,7 +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); @@ -990,7 +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 */ @@ -998,7 +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); @@ -1008,23 +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); @@ -1035,35 +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); @@ -1072,11 +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); @@ -1087,22 +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 */ @@ -1111,29 +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); @@ -1163,41 +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); @@ -1218,9 +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. @@ -1249,8 +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]; @@ -1261,7 +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) { @@ -1271,19 +1391,19 @@ 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); static int __ecc_is_key_valid(const struct ecc_curve *curve, - const u64 *private_key, unsigned int ndigits) + const u64 *private_key, unsigned int ndigits) { u64 one[ECC_MAX_DIGITS] = { 1, }; u64 res[ECC_MAX_DIGITS]; @@ -1306,7 +1426,7 @@ static int __ecc_is_key_valid(const struct ecc_curve *curve, } int ecc_is_key_valid(unsigned int curve_id, unsigned int ndigits, - const u64 *private_key, unsigned int private_key_len) + const u64 *private_key, unsigned int private_key_len) { int nbytes; const struct ecc_curve *curve = ecc_get_curve(curve_id); @@ -1374,7 +1494,7 @@ int ecc_gen_privkey(unsigned int curve_id, unsigned int ndigits, u64 *privkey) EXPORT_SYMBOL(ecc_gen_privkey); int ecc_make_pub_key(unsigned int curve_id, unsigned int ndigits, - const u64 *private_key, u64 *public_key) + const u64 *private_key, u64 *public_key) { int ret = 0; struct ecc_point *pk; @@ -1432,10 +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 */ @@ -1447,7 +1567,7 @@ EXPORT_SYMBOL(ecc_is_pubkey_valid_partial); /* SP800-56A section 5.6.2.3.3 full verification */ int ecc_is_pubkey_valid_full(const struct ecc_curve *curve, - struct ecc_point *pk) + struct ecc_point *pk) { struct ecc_point *nQ; @@ -1473,8 +1593,8 @@ int ecc_is_pubkey_valid_full(const struct ecc_curve *curve, EXPORT_SYMBOL(ecc_is_pubkey_valid_full); int crypto_ecdh_shared_secret(unsigned int curve_id, unsigned int ndigits, - const u64 *private_key, const u64 *public_key, - u64 *secret) + const u64 *private_key, const u64 *public_key, + u64 *secret) { int ret = 0; struct ecc_point *product, *pk; @@ -1484,7 +1604,7 @@ int crypto_ecdh_shared_secret(unsigned int curve_id, unsigned int ndigits, const struct ecc_curve *curve = ecc_get_curve(curve_id); if (!private_key || !public_key || !curve || - ndigits > ARRAY_SIZE(priv) || ndigits > ARRAY_SIZE(rand_z)) { + ndigits > ARRAY_SIZE(priv) || ndigits > ARRAY_SIZE(rand_z)) { ret = -EINVAL; goto out; } diff --git a/crypto/ecc.h b/crypto/ecc.h index 2ea86dfb5cf7..861de67b538f 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 (ECC_CURVE_NIST_P384_DIGITS) #define ECC_DIGITS_TO_BYTES_SHIFT 3