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1 | /* |
2 | * Written by Rob Stradling (rob@comodo.com) for the OpenSSL project 2015. | |
3 | */ | |
4 | /* ==================================================================== | |
5 | * Copyright (c) 2015 The OpenSSL Project. All rights reserved. | |
6 | * | |
7 | * Redistribution and use in source and binary forms, with or without | |
8 | * modification, are permitted provided that the following conditions | |
9 | * are met: | |
10 | * | |
11 | * 1. Redistributions of source code must retain the above copyright | |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in | |
16 | * the documentation and/or other materials provided with the | |
17 | * distribution. | |
18 | * | |
19 | * 3. All advertising materials mentioning features or use of this | |
20 | * software must display the following acknowledgment: | |
21 | * "This product includes software developed by the OpenSSL Project | |
22 | * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" | |
23 | * | |
24 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
25 | * endorse or promote products derived from this software without | |
26 | * prior written permission. For written permission, please contact | |
27 | * licensing@OpenSSL.org. | |
28 | * | |
29 | * 5. Products derived from this software may not be called "OpenSSL" | |
30 | * nor may "OpenSSL" appear in their names without prior written | |
31 | * permission of the OpenSSL Project. | |
32 | * | |
33 | * 6. Redistributions of any form whatsoever must retain the following | |
34 | * acknowledgment: | |
35 | * "This product includes software developed by the OpenSSL Project | |
36 | * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" | |
37 | * | |
38 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
39 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
40 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
41 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
42 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
43 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
44 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
45 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
46 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
47 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
48 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
49 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
50 | * ==================================================================== | |
51 | * | |
52 | * This product includes cryptographic software written by Eric Young | |
53 | * (eay@cryptsoft.com). This product includes software written by Tim | |
54 | * Hudson (tjh@cryptsoft.com). | |
55 | * | |
56 | */ | |
57 | ||
58 | #include <stdio.h> | |
59 | #include "internal/cryptlib.h" | |
60 | #include "internal/o_str.h" | |
61 | #include <openssl/asn1t.h> | |
62 | #include <openssl/conf.h> | |
63 | #include <openssl/x509v3.h> | |
64 | #include "ext_dat.h" | |
65 | ||
66 | static STACK_OF(CONF_VALUE) *i2v_TLS_FEATURE(const X509V3_EXT_METHOD *method, | |
67 | TLS_FEATURE *tls_feature, | |
68 | STACK_OF(CONF_VALUE) *ext_list); | |
69 | static TLS_FEATURE *v2i_TLS_FEATURE(const X509V3_EXT_METHOD *method, | |
70 | X509V3_CTX *ctx, | |
71 | STACK_OF(CONF_VALUE) *nval); | |
72 | ||
73 | ASN1_ITEM_TEMPLATE(TLS_FEATURE) = | |
74 | ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, TLS_FEATURE, ASN1_INTEGER) | |
75 | static_ASN1_ITEM_TEMPLATE_END(TLS_FEATURE) | |
76 | ||
77 | IMPLEMENT_ASN1_ALLOC_FUNCTIONS(TLS_FEATURE) | |
78 | ||
79 | const X509V3_EXT_METHOD v3_tls_feature = { | |
80 | NID_tlsfeature, 0, | |
81 | ASN1_ITEM_ref(TLS_FEATURE), | |
82 | 0, 0, 0, 0, | |
83 | 0, 0, | |
84 | (X509V3_EXT_I2V)i2v_TLS_FEATURE, | |
85 | (X509V3_EXT_V2I)v2i_TLS_FEATURE, | |
86 | 0, 0, | |
87 | NULL | |
88 | }; | |
89 | ||
90 | ||
91 | typedef struct { | |
92 | long num; | |
93 | const char *name; | |
94 | } TLS_FEATURE_NAME; | |
95 | ||
96 | static TLS_FEATURE_NAME tls_feature_tbl[] = { | |
97 | { 5, "status_request" }, | |
98 | { 17, "status_request_v2" } | |
99 | }; | |
100 | ||
101 | /* | |
102 | * i2v_TLS_FEATURE converts the TLS_FEATURE structure tls_feature into the | |
103 | * STACK_OF(CONF_VALUE) structure ext_list. STACK_OF(CONF_VALUE) is the format | |
104 | * used by the CONF library to represent a multi-valued extension. ext_list is | |
105 | * returned. | |
106 | */ | |
107 | static STACK_OF(CONF_VALUE) *i2v_TLS_FEATURE(const X509V3_EXT_METHOD *method, | |
108 | TLS_FEATURE *tls_feature, | |
109 | STACK_OF(CONF_VALUE) *ext_list) | |
110 | { | |
111 | int i; | |
112 | size_t j; | |
113 | ASN1_INTEGER *ai; | |
114 | long tlsextid; | |
115 | for (i = 0; i < sk_ASN1_INTEGER_num(tls_feature); i++) { | |
116 | ai = sk_ASN1_INTEGER_value(tls_feature, i); | |
117 | tlsextid = ASN1_INTEGER_get(ai); | |
118 | for (j = 0; j < OSSL_NELEM(tls_feature_tbl); j++) | |
119 | if (tlsextid == tls_feature_tbl[j].num) | |
120 | break; | |
121 | if (j < OSSL_NELEM(tls_feature_tbl)) | |
122 | X509V3_add_value(NULL, tls_feature_tbl[j].name, &ext_list); | |
123 | else | |
124 | X509V3_add_value_int(NULL, ai, &ext_list); | |
125 | } | |
126 | return ext_list; | |
127 | } | |
128 | ||
129 | /* | |
130 | * v2i_TLS_FEATURE converts the multi-valued extension nval into a TLS_FEATURE | |
131 | * structure, which is returned if the conversion is successful. In case of | |
132 | * error, NULL is returned. | |
133 | */ | |
134 | static TLS_FEATURE *v2i_TLS_FEATURE(const X509V3_EXT_METHOD *method, | |
135 | X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *nval) | |
136 | { | |
137 | TLS_FEATURE *tlsf; | |
138 | char *extval, *endptr; | |
139 | ASN1_INTEGER *ai; | |
140 | CONF_VALUE *val; | |
141 | int i; | |
142 | size_t j; | |
143 | long tlsextid; | |
144 | ||
145 | if ((tlsf = sk_ASN1_INTEGER_new_null()) == NULL) { | |
146 | X509V3err(X509V3_F_V2I_TLS_FEATURE, ERR_R_MALLOC_FAILURE); | |
147 | return NULL; | |
148 | } | |
149 | ||
150 | for (i = 0; i < sk_CONF_VALUE_num(nval); i++) { | |
151 | val = sk_CONF_VALUE_value(nval, i); | |
152 | if (val->value) | |
153 | extval = val->value; | |
154 | else | |
155 | extval = val->name; | |
156 | ||
157 | for (j = 0; j < OSSL_NELEM(tls_feature_tbl); j++) | |
158 | if (OPENSSL_strcasecmp(extval, tls_feature_tbl[j].name) == 0) | |
159 | break; | |
160 | if (j < OSSL_NELEM(tls_feature_tbl)) | |
161 | tlsextid = tls_feature_tbl[j].num; | |
162 | else { | |
163 | tlsextid = strtol(extval, &endptr, 10); | |
164 | if (((*endptr) != '\0') || (extval == endptr) || (tlsextid < 0) || | |
165 | (tlsextid > 65535)) { | |
166 | X509V3err(X509V3_F_V2I_TLS_FEATURE, X509V3_R_INVALID_SYNTAX); | |
167 | X509V3_conf_err(val); | |
168 | goto err; | |
169 | } | |
170 | } | |
171 | ||
172 | ai = ASN1_INTEGER_new(); | |
173 | if (ai == NULL) { | |
174 | X509V3err(X509V3_F_V2I_TLS_FEATURE, ERR_R_MALLOC_FAILURE); | |
175 | goto err; | |
176 | } | |
177 | ASN1_INTEGER_set(ai, tlsextid); | |
178 | sk_ASN1_INTEGER_push(tlsf, ai); | |
179 | } | |
180 | return tlsf; | |
181 | ||
182 | err: | |
183 | sk_ASN1_INTEGER_pop_free(tlsf, ASN1_INTEGER_free); | |
184 | return NULL; | |
185 | } |