1 /*
2 * Copyright 2016-2021 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10 #ifdef OPENSSL_NO_CT
11 # error "CT is disabled"
12 #endif
13
14 #include "ct_local.h"
15
i2s_poison(const X509V3_EXT_METHOD * method,void * val)16 static char *i2s_poison(const X509V3_EXT_METHOD *method, void *val)
17 {
18 return OPENSSL_strdup("NULL");
19 }
20
s2i_poison(const X509V3_EXT_METHOD * method,X509V3_CTX * ctx,const char * str)21 static void *s2i_poison(const X509V3_EXT_METHOD *method, X509V3_CTX *ctx, const char *str)
22 {
23 return ASN1_NULL_new();
24 }
25
i2r_SCT_LIST(X509V3_EXT_METHOD * method,STACK_OF (SCT)* sct_list,BIO * out,int indent)26 static int i2r_SCT_LIST(X509V3_EXT_METHOD *method, STACK_OF(SCT) *sct_list,
27 BIO *out, int indent)
28 {
29 SCT_LIST_print(sct_list, out, indent, "\n", NULL);
30 return 1;
31 }
32
set_sct_list_source(STACK_OF (SCT)* s,sct_source_t source)33 static int set_sct_list_source(STACK_OF(SCT) *s, sct_source_t source)
34 {
35 if (s != NULL) {
36 int i;
37
38 for (i = 0; i < sk_SCT_num(s); i++) {
39 int res = SCT_set_source(sk_SCT_value(s, i), source);
40
41 if (res != 1) {
42 return 0;
43 }
44 }
45 }
46 return 1;
47 }
48
STACK_OF(SCT)49 static STACK_OF(SCT) *x509_ext_d2i_SCT_LIST(STACK_OF(SCT) **a,
50 const unsigned char **pp,
51 long len)
52 {
53 STACK_OF(SCT) *s = d2i_SCT_LIST(a, pp, len);
54
55 if (set_sct_list_source(s, SCT_SOURCE_X509V3_EXTENSION) != 1) {
56 SCT_LIST_free(s);
57 *a = NULL;
58 return NULL;
59 }
60 return s;
61 }
62
STACK_OF(SCT)63 static STACK_OF(SCT) *ocsp_ext_d2i_SCT_LIST(STACK_OF(SCT) **a,
64 const unsigned char **pp,
65 long len)
66 {
67 STACK_OF(SCT) *s = d2i_SCT_LIST(a, pp, len);
68
69 if (set_sct_list_source(s, SCT_SOURCE_OCSP_STAPLED_RESPONSE) != 1) {
70 SCT_LIST_free(s);
71 *a = NULL;
72 return NULL;
73 }
74 return s;
75 }
76
77 /* Handlers for X509v3/OCSP Certificate Transparency extensions */
78 const X509V3_EXT_METHOD ossl_v3_ct_scts[3] = {
79 /* X509v3 extension in certificates that contains SCTs */
80 { NID_ct_precert_scts, 0, NULL,
81 NULL, (X509V3_EXT_FREE)SCT_LIST_free,
82 (X509V3_EXT_D2I)x509_ext_d2i_SCT_LIST, (X509V3_EXT_I2D)i2d_SCT_LIST,
83 NULL, NULL,
84 NULL, NULL,
85 (X509V3_EXT_I2R)i2r_SCT_LIST, NULL,
86 NULL },
87
88 /* X509v3 extension to mark a certificate as a pre-certificate */
89 { NID_ct_precert_poison, 0, ASN1_ITEM_ref(ASN1_NULL),
90 NULL, NULL, NULL, NULL,
91 i2s_poison, s2i_poison,
92 NULL, NULL,
93 NULL, NULL,
94 NULL },
95
96 /* OCSP extension that contains SCTs */
97 { NID_ct_cert_scts, 0, NULL,
98 0, (X509V3_EXT_FREE)SCT_LIST_free,
99 (X509V3_EXT_D2I)ocsp_ext_d2i_SCT_LIST, (X509V3_EXT_I2D)i2d_SCT_LIST,
100 NULL, NULL,
101 NULL, NULL,
102 (X509V3_EXT_I2R)i2r_SCT_LIST, NULL,
103 NULL },
104 };
105