1/* $OpenBSD: ct_policy.c,v 1.6 2023/07/08 07:22:58 beck Exp $ */ 2/* 3 * Implementations of Certificate Transparency SCT policies. 4 * Written by Rob Percival (robpercival@google.com) for the OpenSSL project. 5 */ 6/* ==================================================================== 7 * Copyright (c) 2016 The OpenSSL Project. All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in 18 * the documentation and/or other materials provided with the 19 * distribution. 20 * 21 * 3. All advertising materials mentioning features or use of this 22 * software must display the following acknowledgment: 23 * "This product includes software developed by the OpenSSL Project 24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 25 * 26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 27 * endorse or promote products derived from this software without 28 * prior written permission. For written permission, please contact 29 * licensing@OpenSSL.org. 30 * 31 * 5. Products derived from this software may not be called "OpenSSL" 32 * nor may "OpenSSL" appear in their names without prior written 33 * permission of the OpenSSL Project. 34 * 35 * 6. Redistributions of any form whatsoever must retain the following 36 * acknowledgment: 37 * "This product includes software developed by the OpenSSL Project 38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 39 * 40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 51 * OF THE POSSIBILITY OF SUCH DAMAGE. 52 * ==================================================================== 53 */ 54 55#ifdef OPENSSL_NO_CT 56# error "CT is disabled" 57#endif 58 59#include <openssl/ct.h> 60#include <openssl/err.h> 61#include <time.h> 62 63#include "ct_local.h" 64 65/* 66 * Number of seconds in the future that an SCT timestamp can be, by default, 67 * without being considered invalid. This is added to time() when setting a 68 * default value for CT_POLICY_EVAL_CTX.epoch_time_in_ms. 69 * It can be overridden by calling CT_POLICY_EVAL_CTX_set_time(). 70 */ 71static const time_t SCT_CLOCK_DRIFT_TOLERANCE = 300; 72 73CT_POLICY_EVAL_CTX * 74CT_POLICY_EVAL_CTX_new(void) 75{ 76 CT_POLICY_EVAL_CTX *ctx = calloc(1, sizeof(CT_POLICY_EVAL_CTX)); 77 78 if (ctx == NULL) { 79 CTerror(ERR_R_MALLOC_FAILURE); 80 return NULL; 81 } 82 83 /* time(NULL) shouldn't ever fail, so don't bother checking for -1. */ 84 ctx->epoch_time_in_ms = (uint64_t)(time(NULL) + SCT_CLOCK_DRIFT_TOLERANCE) * 85 1000; 86 87 return ctx; 88} 89LCRYPTO_ALIAS(CT_POLICY_EVAL_CTX_new); 90 91void 92CT_POLICY_EVAL_CTX_free(CT_POLICY_EVAL_CTX *ctx) 93{ 94 if (ctx == NULL) 95 return; 96 X509_free(ctx->cert); 97 X509_free(ctx->issuer); 98 free(ctx); 99} 100LCRYPTO_ALIAS(CT_POLICY_EVAL_CTX_free); 101 102int 103CT_POLICY_EVAL_CTX_set1_cert(CT_POLICY_EVAL_CTX *ctx, X509 *cert) 104{ 105 if (!X509_up_ref(cert)) 106 return 0; 107 ctx->cert = cert; 108 return 1; 109} 110LCRYPTO_ALIAS(CT_POLICY_EVAL_CTX_set1_cert); 111 112int 113CT_POLICY_EVAL_CTX_set1_issuer(CT_POLICY_EVAL_CTX *ctx, X509 *issuer) 114{ 115 if (!X509_up_ref(issuer)) 116 return 0; 117 ctx->issuer = issuer; 118 return 1; 119} 120LCRYPTO_ALIAS(CT_POLICY_EVAL_CTX_set1_issuer); 121 122void 123CT_POLICY_EVAL_CTX_set_shared_CTLOG_STORE(CT_POLICY_EVAL_CTX *ctx, 124 CTLOG_STORE *log_store) 125{ 126 ctx->log_store = log_store; 127} 128LCRYPTO_ALIAS(CT_POLICY_EVAL_CTX_set_shared_CTLOG_STORE); 129 130void 131CT_POLICY_EVAL_CTX_set_time(CT_POLICY_EVAL_CTX *ctx, uint64_t time_in_ms) 132{ 133 ctx->epoch_time_in_ms = time_in_ms; 134} 135LCRYPTO_ALIAS(CT_POLICY_EVAL_CTX_set_time); 136 137X509 * 138CT_POLICY_EVAL_CTX_get0_cert(const CT_POLICY_EVAL_CTX *ctx) 139{ 140 return ctx->cert; 141} 142LCRYPTO_ALIAS(CT_POLICY_EVAL_CTX_get0_cert); 143 144X509 * 145CT_POLICY_EVAL_CTX_get0_issuer(const CT_POLICY_EVAL_CTX *ctx) 146{ 147 return ctx->issuer; 148} 149LCRYPTO_ALIAS(CT_POLICY_EVAL_CTX_get0_issuer); 150 151const CTLOG_STORE * 152CT_POLICY_EVAL_CTX_get0_log_store(const CT_POLICY_EVAL_CTX *ctx) 153{ 154 return ctx->log_store; 155} 156LCRYPTO_ALIAS(CT_POLICY_EVAL_CTX_get0_log_store); 157 158uint64_t 159CT_POLICY_EVAL_CTX_get_time(const CT_POLICY_EVAL_CTX *ctx) 160{ 161 return ctx->epoch_time_in_ms; 162} 163LCRYPTO_ALIAS(CT_POLICY_EVAL_CTX_get_time); 164