1 /*
2 * Copyright 2015-2022 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 #include "internal/e_os.h"
11 #include "internal/cryptlib.h"
12 #include <stdio.h>
13 #include <openssl/asn1t.h>
14 #include <openssl/conf.h>
15 #include <openssl/x509v3.h>
16 #include "ext_dat.h"
17 #include "x509_local.h"
18
19 static STACK_OF(CONF_VALUE) *i2v_TLS_FEATURE(const X509V3_EXT_METHOD *method,
20 TLS_FEATURE *tls_feature,
21 STACK_OF(CONF_VALUE) *ext_list);
22 static TLS_FEATURE *v2i_TLS_FEATURE(const X509V3_EXT_METHOD *method,
23 X509V3_CTX *ctx,
24 STACK_OF(CONF_VALUE) *nval);
25
26 ASN1_ITEM_TEMPLATE(TLS_FEATURE) =
27 ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, TLS_FEATURE, ASN1_INTEGER)
28 static_ASN1_ITEM_TEMPLATE_END(TLS_FEATURE)
29
30 IMPLEMENT_ASN1_ALLOC_FUNCTIONS(TLS_FEATURE)
31
32 const X509V3_EXT_METHOD ossl_v3_tls_feature = {
33 NID_tlsfeature, 0,
34 ASN1_ITEM_ref(TLS_FEATURE),
35 0, 0, 0, 0,
36 0, 0,
37 (X509V3_EXT_I2V)i2v_TLS_FEATURE,
38 (X509V3_EXT_V2I)v2i_TLS_FEATURE,
39 0, 0,
40 NULL
41 };
42
43
44 typedef struct {
45 long num;
46 const char *name;
47 } TLS_FEATURE_NAME;
48
49 static TLS_FEATURE_NAME tls_feature_tbl[] = {
50 { 5, "status_request" },
51 { 17, "status_request_v2" }
52 };
53
54 /*
55 * i2v_TLS_FEATURE converts the TLS_FEATURE structure tls_feature into the
56 * STACK_OF(CONF_VALUE) structure ext_list. STACK_OF(CONF_VALUE) is the format
57 * used by the CONF library to represent a multi-valued extension. ext_list is
58 * returned.
59 */
STACK_OF(CONF_VALUE)60 static STACK_OF(CONF_VALUE) *i2v_TLS_FEATURE(const X509V3_EXT_METHOD *method,
61 TLS_FEATURE *tls_feature,
62 STACK_OF(CONF_VALUE) *ext_list)
63 {
64 int i;
65 size_t j;
66 ASN1_INTEGER *ai;
67 long tlsextid;
68 for (i = 0; i < sk_ASN1_INTEGER_num(tls_feature); i++) {
69 ai = sk_ASN1_INTEGER_value(tls_feature, i);
70 tlsextid = ASN1_INTEGER_get(ai);
71 for (j = 0; j < OSSL_NELEM(tls_feature_tbl); j++)
72 if (tlsextid == tls_feature_tbl[j].num)
73 break;
74 if (j < OSSL_NELEM(tls_feature_tbl))
75 X509V3_add_value(NULL, tls_feature_tbl[j].name, &ext_list);
76 else
77 X509V3_add_value_int(NULL, ai, &ext_list);
78 }
79 return ext_list;
80 }
81
82 /*
83 * v2i_TLS_FEATURE converts the multi-valued extension nval into a TLS_FEATURE
84 * structure, which is returned if the conversion is successful. In case of
85 * error, NULL is returned.
86 */
v2i_TLS_FEATURE(const X509V3_EXT_METHOD * method,X509V3_CTX * ctx,STACK_OF (CONF_VALUE)* nval)87 static TLS_FEATURE *v2i_TLS_FEATURE(const X509V3_EXT_METHOD *method,
88 X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval)
89 {
90 TLS_FEATURE *tlsf;
91 char *extval, *endptr;
92 ASN1_INTEGER *ai = NULL;
93 CONF_VALUE *val;
94 int i;
95 size_t j;
96 long tlsextid;
97
98 if ((tlsf = sk_ASN1_INTEGER_new_null()) == NULL) {
99 ERR_raise(ERR_LIB_X509V3, ERR_R_CRYPTO_LIB);
100 return NULL;
101 }
102
103 for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
104 val = sk_CONF_VALUE_value(nval, i);
105 if (val->value)
106 extval = val->value;
107 else
108 extval = val->name;
109
110 for (j = 0; j < OSSL_NELEM(tls_feature_tbl); j++)
111 if (OPENSSL_strcasecmp(extval, tls_feature_tbl[j].name) == 0)
112 break;
113 if (j < OSSL_NELEM(tls_feature_tbl))
114 tlsextid = tls_feature_tbl[j].num;
115 else {
116 tlsextid = strtol(extval, &endptr, 10);
117 if (((*endptr) != '\0') || (extval == endptr) || (tlsextid < 0) ||
118 (tlsextid > 65535)) {
119 ERR_raise(ERR_LIB_X509V3, X509V3_R_INVALID_SYNTAX);
120 X509V3_conf_add_error_name_value(val);
121 goto err;
122 }
123 }
124
125 if ((ai = ASN1_INTEGER_new()) == NULL
126 || !ASN1_INTEGER_set(ai, tlsextid)
127 || sk_ASN1_INTEGER_push(tlsf, ai) <= 0) {
128 ERR_raise(ERR_LIB_X509V3, ERR_R_ASN1_LIB);
129 goto err;
130 }
131 /* So it doesn't get purged if an error occurs next time around */
132 ai = NULL;
133 }
134 return tlsf;
135
136 err:
137 sk_ASN1_INTEGER_pop_free(tlsf, ASN1_INTEGER_free);
138 ASN1_INTEGER_free(ai);
139 return NULL;
140 }
141
