1 /* $OpenBSD: ct_policy.c,v 1.5 2021/12/18 16:34:52 tb 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 */ 71 static const time_t SCT_CLOCK_DRIFT_TOLERANCE = 300; 72 73 CT_POLICY_EVAL_CTX * 74 CT_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 } 89 90 void 91 CT_POLICY_EVAL_CTX_free(CT_POLICY_EVAL_CTX *ctx) 92 { 93 if (ctx == NULL) 94 return; 95 X509_free(ctx->cert); 96 X509_free(ctx->issuer); 97 free(ctx); 98 } 99 100 int 101 CT_POLICY_EVAL_CTX_set1_cert(CT_POLICY_EVAL_CTX *ctx, X509 *cert) 102 { 103 if (!X509_up_ref(cert)) 104 return 0; 105 ctx->cert = cert; 106 return 1; 107 } 108 109 int 110 CT_POLICY_EVAL_CTX_set1_issuer(CT_POLICY_EVAL_CTX *ctx, X509 *issuer) 111 { 112 if (!X509_up_ref(issuer)) 113 return 0; 114 ctx->issuer = issuer; 115 return 1; 116 } 117 118 void 119 CT_POLICY_EVAL_CTX_set_shared_CTLOG_STORE(CT_POLICY_EVAL_CTX *ctx, 120 CTLOG_STORE *log_store) 121 { 122 ctx->log_store = log_store; 123 } 124 125 void 126 CT_POLICY_EVAL_CTX_set_time(CT_POLICY_EVAL_CTX *ctx, uint64_t time_in_ms) 127 { 128 ctx->epoch_time_in_ms = time_in_ms; 129 } 130 131 X509 * 132 CT_POLICY_EVAL_CTX_get0_cert(const CT_POLICY_EVAL_CTX *ctx) 133 { 134 return ctx->cert; 135 } 136 137 X509 * 138 CT_POLICY_EVAL_CTX_get0_issuer(const CT_POLICY_EVAL_CTX *ctx) 139 { 140 return ctx->issuer; 141 } 142 143 const CTLOG_STORE * 144 CT_POLICY_EVAL_CTX_get0_log_store(const CT_POLICY_EVAL_CTX *ctx) 145 { 146 return ctx->log_store; 147 } 148 149 uint64_t 150 CT_POLICY_EVAL_CTX_get_time(const CT_POLICY_EVAL_CTX *ctx) 151 { 152 return ctx->epoch_time_in_ms; 153 } 154