1 /*
2 * Copyright 1999-2020 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 /* X509 v3 extension utilities */
11
12 #include <stdio.h>
13 #include "internal/cryptlib.h"
14 #include <openssl/conf.h>
15 #include <openssl/x509v3.h>
16
17 /* Extension printing routines */
18
19 static int unknown_ext_print(BIO *out, const unsigned char *ext, int extlen,
20 unsigned long flag, int indent, int supported);
21
22 /* Print out a name+value stack */
23
X509V3_EXT_val_prn(BIO * out,STACK_OF (CONF_VALUE)* val,int indent,int ml)24 void X509V3_EXT_val_prn(BIO *out, STACK_OF(CONF_VALUE) *val, int indent,
25 int ml)
26 {
27 int i;
28 CONF_VALUE *nval;
29 if (!val)
30 return;
31 if (!ml || !sk_CONF_VALUE_num(val)) {
32 BIO_printf(out, "%*s", indent, "");
33 if (!sk_CONF_VALUE_num(val))
34 BIO_puts(out, "<EMPTY>\n");
35 }
36 for (i = 0; i < sk_CONF_VALUE_num(val); i++) {
37 if (ml) {
38 if (i > 0)
39 BIO_printf(out, "\n");
40 BIO_printf(out, "%*s", indent, "");
41 } else if (i > 0)
42 BIO_printf(out, ", ");
43 nval = sk_CONF_VALUE_value(val, i);
44 if (!nval->name)
45 BIO_puts(out, nval->value);
46 else if (!nval->value)
47 BIO_puts(out, nval->name);
48 #ifndef CHARSET_EBCDIC
49 else
50 BIO_printf(out, "%s:%s", nval->name, nval->value);
51 #else
52 else {
53 int len;
54 char *tmp;
55 len = strlen(nval->value) + 1;
56 tmp = OPENSSL_malloc(len);
57 if (tmp != NULL) {
58 ascii2ebcdic(tmp, nval->value, len);
59 BIO_printf(out, "%s:%s", nval->name, tmp);
60 OPENSSL_free(tmp);
61 }
62 }
63 #endif
64 }
65 }
66
67 /* Main routine: print out a general extension */
68
X509V3_EXT_print(BIO * out,X509_EXTENSION * ext,unsigned long flag,int indent)69 int X509V3_EXT_print(BIO *out, X509_EXTENSION *ext, unsigned long flag,
70 int indent)
71 {
72 void *ext_str = NULL;
73 char *value = NULL;
74 ASN1_OCTET_STRING *extoct;
75 const unsigned char *p;
76 int extlen;
77 const X509V3_EXT_METHOD *method;
78 STACK_OF(CONF_VALUE) *nval = NULL;
79 int ok = 1;
80
81 extoct = X509_EXTENSION_get_data(ext);
82 p = ASN1_STRING_get0_data(extoct);
83 extlen = ASN1_STRING_length(extoct);
84
85 if ((method = X509V3_EXT_get(ext)) == NULL)
86 return unknown_ext_print(out, p, extlen, flag, indent, 0);
87 if (method->it)
88 ext_str = ASN1_item_d2i(NULL, &p, extlen, ASN1_ITEM_ptr(method->it));
89 else
90 ext_str = method->d2i(NULL, &p, extlen);
91
92 if (!ext_str)
93 return unknown_ext_print(out, p, extlen, flag, indent, 1);
94
95 if (method->i2s) {
96 if ((value = method->i2s(method, ext_str)) == NULL) {
97 ok = 0;
98 goto err;
99 }
100 #ifndef CHARSET_EBCDIC
101 BIO_printf(out, "%*s%s", indent, "", value);
102 #else
103 {
104 int len;
105 char *tmp;
106 len = strlen(value) + 1;
107 tmp = OPENSSL_malloc(len);
108 if (tmp != NULL) {
109 ascii2ebcdic(tmp, value, len);
110 BIO_printf(out, "%*s%s", indent, "", tmp);
111 OPENSSL_free(tmp);
112 }
113 }
114 #endif
115 } else if (method->i2v) {
116 if ((nval = method->i2v(method, ext_str, NULL)) == NULL) {
117 ok = 0;
118 goto err;
119 }
120 X509V3_EXT_val_prn(out, nval, indent,
121 method->ext_flags & X509V3_EXT_MULTILINE);
122 } else if (method->i2r) {
123 if (!method->i2r(method, ext_str, out, indent))
124 ok = 0;
125 } else
126 ok = 0;
127
128 err:
129 sk_CONF_VALUE_pop_free(nval, X509V3_conf_free);
130 OPENSSL_free(value);
131 if (method->it)
132 ASN1_item_free(ext_str, ASN1_ITEM_ptr(method->it));
133 else
134 method->ext_free(ext_str);
135 return ok;
136 }
137
X509V3_extensions_print(BIO * bp,const char * title,const STACK_OF (X509_EXTENSION)* exts,unsigned long flag,int indent)138 int X509V3_extensions_print(BIO *bp, const char *title,
139 const STACK_OF(X509_EXTENSION) *exts,
140 unsigned long flag, int indent)
141 {
142 int i, j;
143
144 if (sk_X509_EXTENSION_num(exts) <= 0)
145 return 1;
146
147 if (title) {
148 BIO_printf(bp, "%*s%s:\n", indent, "", title);
149 indent += 4;
150 }
151
152 for (i = 0; i < sk_X509_EXTENSION_num(exts); i++) {
153 ASN1_OBJECT *obj;
154 X509_EXTENSION *ex;
155
156 ex = sk_X509_EXTENSION_value(exts, i);
157 obj = X509_EXTENSION_get_object(ex);
158 if ((flag & X509_FLAG_EXTENSIONS_ONLY_KID) != 0
159 && OBJ_obj2nid(obj) != NID_subject_key_identifier
160 && OBJ_obj2nid(obj) != NID_authority_key_identifier)
161 continue;
162 if (indent && BIO_printf(bp, "%*s", indent, "") <= 0)
163 return 0;
164 i2a_ASN1_OBJECT(bp, obj);
165 j = X509_EXTENSION_get_critical(ex);
166 if (BIO_printf(bp, ": %s\n", j ? "critical" : "") <= 0)
167 return 0;
168 if (!X509V3_EXT_print(bp, ex, flag, indent + 4)) {
169 BIO_printf(bp, "%*s", indent + 4, "");
170 ASN1_STRING_print(bp, X509_EXTENSION_get_data(ex));
171 }
172 if (BIO_write(bp, "\n", 1) <= 0)
173 return 0;
174 }
175 return 1;
176 }
177
unknown_ext_print(BIO * out,const unsigned char * ext,int extlen,unsigned long flag,int indent,int supported)178 static int unknown_ext_print(BIO *out, const unsigned char *ext, int extlen,
179 unsigned long flag, int indent, int supported)
180 {
181 switch (flag & X509V3_EXT_UNKNOWN_MASK) {
182
183 case X509V3_EXT_DEFAULT:
184 return 0;
185
186 case X509V3_EXT_ERROR_UNKNOWN:
187 if (supported)
188 BIO_printf(out, "%*s<Parse Error>", indent, "");
189 else
190 BIO_printf(out, "%*s<Not Supported>", indent, "");
191 return 1;
192
193 case X509V3_EXT_PARSE_UNKNOWN:
194 return ASN1_parse_dump(out, ext, extlen, indent, -1);
195 case X509V3_EXT_DUMP_UNKNOWN:
196 return BIO_dump_indent(out, (const char *)ext, extlen, indent);
197
198 default:
199 return 1;
200 }
201 }
202
203 #ifndef OPENSSL_NO_STDIO
X509V3_EXT_print_fp(FILE * fp,X509_EXTENSION * ext,int flag,int indent)204 int X509V3_EXT_print_fp(FILE *fp, X509_EXTENSION *ext, int flag, int indent)
205 {
206 BIO *bio_tmp;
207 int ret;
208
209 if ((bio_tmp = BIO_new_fp(fp, BIO_NOCLOSE)) == NULL)
210 return 0;
211 ret = X509V3_EXT_print(bio_tmp, ext, flag, indent);
212 BIO_free(bio_tmp);
213 return ret;
214 }
215 #endif
216