X-Git-Url: https://git.openssl.org/gitweb/?a=blobdiff_plain;f=crypto%2Fdh%2Fdh_pmeth.c;h=f630fd3eea3e54c2a3385180afeda6f6d98a5288;hb=70b0b977f73cd70e17538af3095d18e0cf59132e;hp=b98907972d00620300bac821192e3de815b75e8b;hpb=edeb3fd2955c42c3e249a0539ef75c21db8c5ca1;p=openssl.git diff --git a/crypto/dh/dh_pmeth.c b/crypto/dh/dh_pmeth.c index b98907972d..f630fd3eea 100644 --- a/crypto/dh/dh_pmeth.c +++ b/crypto/dh/dh_pmeth.c @@ -1,59 +1,10 @@ /* - * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project - * 2006. - */ -/* ==================================================================== - * Copyright (c) 2006 The OpenSSL Project. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * - * 3. All advertising materials mentioning features or use of this - * software must display the following acknowledgment: - * "This product includes software developed by the OpenSSL Project - * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" - * - * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to - * endorse or promote products derived from this software without - * prior written permission. For written permission, please contact - * licensing@OpenSSL.org. - * - * 5. Products derived from this software may not be called "OpenSSL" - * nor may "OpenSSL" appear in their names without prior written - * permission of the OpenSSL Project. - * - * 6. Redistributions of any form whatsoever must retain the following - * acknowledgment: - * "This product includes software developed by the OpenSSL Project - * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" - * - * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY - * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR - * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR - * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; - * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, - * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED - * OF THE POSSIBILITY OF SUCH DAMAGE. - * ==================================================================== - * - * This product includes cryptographic software written by Eric Young - * (eay@cryptsoft.com). This product includes software written by Tim - * Hudson (tjh@cryptsoft.com). + * Copyright 2006-2018 The OpenSSL Project Authors. All Rights Reserved. * + * Licensed under the Apache License 2.0 (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html */ #include @@ -75,9 +26,11 @@ typedef struct { int generator; int use_dsa; int subprime_len; + int pad; /* message digest used for parameter generation */ const EVP_MD *md; int rfc5114_param; + int param_nid; /* Keygen callback info */ int gentmp[2]; /* KDF (if any) to use for DH */ @@ -97,10 +50,11 @@ static int pkey_dh_init(EVP_PKEY_CTX *ctx) { DH_PKEY_CTX *dctx; - dctx = OPENSSL_zalloc(sizeof(*dctx)); - if (dctx == NULL) + if ((dctx = OPENSSL_zalloc(sizeof(*dctx))) == NULL) { + DHerr(DH_F_PKEY_DH_INIT, ERR_R_MALLOC_FAILURE); return 0; - dctx->prime_len = 1024; + } + dctx->prime_len = 2048; dctx->subprime_len = -1; dctx->generator = 2; dctx->kdf_type = EVP_PKEY_DH_KDF_NONE; @@ -123,7 +77,7 @@ static void pkey_dh_cleanup(EVP_PKEY_CTX *ctx) } -static int pkey_dh_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src) +static int pkey_dh_copy(EVP_PKEY_CTX *dst, const EVP_PKEY_CTX *src) { DH_PKEY_CTX *dctx, *sctx; if (!pkey_dh_init(dst)) @@ -134,8 +88,10 @@ static int pkey_dh_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src) dctx->subprime_len = sctx->subprime_len; dctx->generator = sctx->generator; dctx->use_dsa = sctx->use_dsa; + dctx->pad = sctx->pad; dctx->md = sctx->md; dctx->rfc5114_param = sctx->rfc5114_param; + dctx->param_nid = sctx->param_nid; dctx->kdf_type = sctx->kdf_type; dctx->kdf_oid = OBJ_dup(sctx->kdf_oid); @@ -168,6 +124,10 @@ static int pkey_dh_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2) dctx->subprime_len = p1; return 1; + case EVP_PKEY_CTRL_DH_PAD: + dctx->pad = p1; + return 1; + case EVP_PKEY_CTRL_DH_PARAMGEN_GENERATOR: if (dctx->use_dsa) return -2; @@ -186,11 +146,17 @@ static int pkey_dh_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2) return 1; case EVP_PKEY_CTRL_DH_RFC5114: - if (p1 < 1 || p1 > 3) + if (p1 < 1 || p1 > 3 || dctx->param_nid != NID_undef) return -2; dctx->rfc5114_param = p1; return 1; + case EVP_PKEY_CTRL_DH_NID: + if (p1 <= 0 || dctx->rfc5114_param != 0) + return -2; + dctx->param_nid = p1; + return 1; + case EVP_PKEY_CTRL_PEER_KEY: /* Default behaviour is OK */ return 1; @@ -270,6 +236,17 @@ static int pkey_dh_ctrl_str(EVP_PKEY_CTX *ctx, dctx->rfc5114_param = len; return 1; } + if (strcmp(type, "dh_param") == 0) { + DH_PKEY_CTX *dctx = ctx->data; + int nid = OBJ_sn2nid(value); + + if (nid == NID_undef) { + DHerr(DH_F_PKEY_DH_CTRL_STR, DH_R_INVALID_PARAMETER_NAME); + return -2; + } + dctx->param_nid = nid; + return 1; + } if (strcmp(type, "dh_paramgen_generator") == 0) { int len; len = atoi(value); @@ -285,6 +262,11 @@ static int pkey_dh_ctrl_str(EVP_PKEY_CTX *ctx, typ = atoi(value); return EVP_PKEY_CTX_set_dh_paramgen_type(ctx, typ); } + if (strcmp(type, "dh_pad") == 0) { + int pad; + pad = atoi(value); + return EVP_PKEY_CTX_set_dh_pad(ctx, pad); + } return -2; } @@ -369,6 +351,13 @@ static int pkey_dh_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey) return 1; } + if (dctx->param_nid != 0) { + if ((dh = DH_new_by_nid(dctx->param_nid)) == NULL) + return 0; + EVP_PKEY_assign(pkey, EVP_PKEY_DH, dh); + return 1; + } + if (ctx->pkey_gencb) { pcb = BN_GENCB_new(); if (pcb == NULL) @@ -408,17 +397,22 @@ static int pkey_dh_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey) static int pkey_dh_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey) { + DH_PKEY_CTX *dctx = ctx->data; DH *dh = NULL; - if (ctx->pkey == NULL) { + + if (ctx->pkey == NULL && dctx->param_nid == 0) { DHerr(DH_F_PKEY_DH_KEYGEN, DH_R_NO_PARAMETERS_SET); return 0; } - dh = DH_new(); + if (dctx->param_nid != 0) + dh = DH_new_by_nid(dctx->param_nid); + else + dh = DH_new(); if (dh == NULL) return 0; EVP_PKEY_assign(pkey, ctx->pmeth->pkey_id, dh); /* Note: if error return, pkey is freed by parent routine */ - if (!EVP_PKEY_copy_parameters(pkey, ctx->pkey)) + if (ctx->pkey != NULL && !EVP_PKEY_copy_parameters(pkey, ctx->pkey)) return 0; return DH_generate_key(pkey->pkey.dh); } @@ -441,7 +435,10 @@ static int pkey_dh_derive(EVP_PKEY_CTX *ctx, unsigned char *key, *keylen = DH_size(dh); return 1; } - ret = DH_compute_key(key, dhpub, dh); + if (dctx->pad) + ret = DH_compute_key_padded(key, dhpub, dh); + else + ret = DH_compute_key(key, dhpub, dh); if (ret < 0) return ret; *keylen = ret;