1 /* $OpenBSD: ct_x509v3.c,v 1.4 2021/12/05 09:37:46 tb Exp $ */ 2 /* 3 * Copyright 2016 The OpenSSL Project Authors. All Rights Reserved. 4 * 5 * Licensed under the OpenSSL license (the "License"). You may not use 6 * this file except in compliance with the License. You can obtain a copy 7 * in the file LICENSE in the source distribution or at 8 * https://www.openssl.org/source/license.html 9 */ 10 11 #ifdef OPENSSL_NO_CT 12 # error "CT is disabled" 13 #endif 14 15 #include <string.h> 16 17 #include "ct_local.h" 18 19 static char * 20 i2s_poison(const X509V3_EXT_METHOD *method, void *val) 21 { 22 return strdup("NULL"); 23 } 24 25 static void * 26 s2i_poison(const X509V3_EXT_METHOD *method, X509V3_CTX *ctx, const char *str) 27 { 28 return ASN1_NULL_new(); 29 } 30 31 static int 32 i2r_SCT_LIST(X509V3_EXT_METHOD *method, STACK_OF(SCT) *sct_list, BIO *out, 33 int indent) 34 { 35 SCT_LIST_print(sct_list, out, indent, "\n", NULL); 36 return 1; 37 } 38 39 static int 40 set_sct_list_source(STACK_OF(SCT) *s, sct_source_t source) 41 { 42 if (s != NULL) { 43 int i; 44 45 for (i = 0; i < sk_SCT_num(s); i++) { 46 int res = SCT_set_source(sk_SCT_value(s, i), source); 47 48 if (res != 1) { 49 return 0; 50 } 51 } 52 } 53 return 1; 54 } 55 56 static STACK_OF(SCT) * 57 x509_ext_d2i_SCT_LIST(STACK_OF(SCT) **a, const unsigned char **pp, long len) 58 { 59 STACK_OF(SCT) *s = d2i_SCT_LIST(a, pp, len); 60 61 if (set_sct_list_source(s, SCT_SOURCE_X509V3_EXTENSION) != 1) { 62 SCT_LIST_free(s); 63 *a = NULL; 64 return NULL; 65 } 66 return s; 67 } 68 69 static STACK_OF(SCT) * 70 ocsp_ext_d2i_SCT_LIST(STACK_OF(SCT) **a, const unsigned char **pp, long len) 71 { 72 STACK_OF(SCT) *s = d2i_SCT_LIST(a, pp, len); 73 74 if (set_sct_list_source(s, SCT_SOURCE_OCSP_STAPLED_RESPONSE) != 1) { 75 SCT_LIST_free(s); 76 *a = NULL; 77 return NULL; 78 } 79 return s; 80 } 81 82 /* Handlers for X509v3/OCSP Certificate Transparency extensions */ 83 const X509V3_EXT_METHOD v3_ct_scts[3] = { 84 /* X509v3 extension in certificates that contains SCTs */ 85 { NID_ct_precert_scts, 0, NULL, 86 NULL, (X509V3_EXT_FREE)SCT_LIST_free, 87 (X509V3_EXT_D2I)x509_ext_d2i_SCT_LIST, (X509V3_EXT_I2D)i2d_SCT_LIST, 88 NULL, NULL, 89 NULL, NULL, 90 (X509V3_EXT_I2R)i2r_SCT_LIST, NULL, 91 NULL }, 92 93 /* X509v3 extension to mark a certificate as a pre-certificate */ 94 { NID_ct_precert_poison, 0, &ASN1_NULL_it, 95 NULL, NULL, NULL, NULL, 96 i2s_poison, s2i_poison, 97 NULL, NULL, 98 NULL, NULL, 99 NULL }, 100 101 /* OCSP extension that contains SCTs */ 102 { NID_ct_cert_scts, 0, NULL, 103 0, (X509V3_EXT_FREE)SCT_LIST_free, 104 (X509V3_EXT_D2I)ocsp_ext_d2i_SCT_LIST, (X509V3_EXT_I2D)i2d_SCT_LIST, 105 NULL, NULL, 106 NULL, NULL, 107 (X509V3_EXT_I2R)i2r_SCT_LIST, NULL, 108 NULL }, 109 }; 110