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 }
42 else if (i > 0)
43 BIO_printf(out, ", ");
44 nval = sk_CONF_VALUE_value(val, i);
45 if (!nval->name)
46 BIO_puts(out, nval->value);
47 else if (!nval->value)
48 BIO_puts(out, nval->name);
49 #ifndef CHARSET_EBCDIC
50 else
51 BIO_printf(out, "%s:%s", nval->name, nval->value);
52 #else
53 else {
54 int len;
55 char *tmp;
56 len = strlen(nval->value) + 1;
57 tmp = OPENSSL_malloc(len);
58 if (tmp != NULL) {
59 ascii2ebcdic(tmp, nval->value, len);
60 BIO_printf(out, "%s:%s", nval->name, tmp);
61 OPENSSL_free(tmp);
62 }
63 }
64 #endif
65 }
66 }
67
68 /* Main routine: print out a general extension */
69
X509V3_EXT_print(BIO * out,X509_EXTENSION * ext,unsigned long flag,int indent)70 int X509V3_EXT_print(BIO *out, X509_EXTENSION *ext, unsigned long flag,
71 int indent)
72 {
73 void *ext_str = NULL;
74 char *value = NULL;
75 ASN1_OCTET_STRING *extoct;
76 const unsigned char *p;
77 int extlen;
78 const X509V3_EXT_METHOD *method;
79 STACK_OF(CONF_VALUE) *nval = NULL;
80 int ok = 1;
81
82 extoct = X509_EXTENSION_get_data(ext);
83 p = ASN1_STRING_get0_data(extoct);
84 extlen = ASN1_STRING_length(extoct);
85
86 if ((method = X509V3_EXT_get(ext)) == NULL)
87 return unknown_ext_print(out, p, extlen, flag, indent, 0);
88 if (method->it)
89 ext_str = ASN1_item_d2i(NULL, &p, extlen, ASN1_ITEM_ptr(method->it));
90 else
91 ext_str = method->d2i(NULL, &p, extlen);
92
93 if (!ext_str)
94 return unknown_ext_print(out, p, extlen, flag, indent, 1);
95
96 if (method->i2s) {
97 if ((value = method->i2s(method, ext_str)) == NULL) {
98 ok = 0;
99 goto err;
100 }
101 #ifndef CHARSET_EBCDIC
102 BIO_printf(out, "%*s%s", indent, "", value);
103 #else
104 {
105 int len;
106 char *tmp;
107 len = strlen(value) + 1;
108 tmp = OPENSSL_malloc(len);
109 if (tmp != NULL) {
110 ascii2ebcdic(tmp, value, len);
111 BIO_printf(out, "%*s%s", indent, "", tmp);
112 OPENSSL_free(tmp);
113 }
114 }
115 #endif
116 } else if (method->i2v) {
117 if ((nval = method->i2v(method, ext_str, NULL)) == NULL) {
118 ok = 0;
119 goto err;
120 }
121 X509V3_EXT_val_prn(out, nval, indent,
122 method->ext_flags & X509V3_EXT_MULTILINE);
123 } else if (method->i2r) {
124 if (!method->i2r(method, ext_str, out, indent))
125 ok = 0;
126 } else
127 ok = 0;
128
129 err:
130 sk_CONF_VALUE_pop_free(nval, X509V3_conf_free);
131 OPENSSL_free(value);
132 if (method->it)
133 ASN1_item_free(ext_str, ASN1_ITEM_ptr(method->it));
134 else
135 method->ext_free(ext_str);
136 return ok;
137 }
138
X509V3_extensions_print(BIO * bp,const char * title,const STACK_OF (X509_EXTENSION)* exts,unsigned long flag,int indent)139 int X509V3_extensions_print(BIO *bp, const char *title,
140 const STACK_OF(X509_EXTENSION) *exts,
141 unsigned long flag, int indent)
142 {
143 int i, j;
144
145 if (sk_X509_EXTENSION_num(exts) <= 0)
146 return 1;
147
148 if (title) {
149 BIO_printf(bp, "%*s%s:\n", indent, "", title);
150 indent += 4;
151 }
152
153 for (i = 0; i < sk_X509_EXTENSION_num(exts); i++) {
154 ASN1_OBJECT *obj;
155 X509_EXTENSION *ex;
156
157 ex = sk_X509_EXTENSION_value(exts, i);
158 obj = X509_EXTENSION_get_object(ex);
159 if ((flag & X509_FLAG_EXTENSIONS_ONLY_KID) != 0
160 && OBJ_obj2nid(obj) != NID_subject_key_identifier
161 && OBJ_obj2nid(obj) != NID_authority_key_identifier)
162 continue;
163 if (indent && BIO_printf(bp, "%*s", indent, "") <= 0)
164 return 0;
165 i2a_ASN1_OBJECT(bp, obj);
166 j = X509_EXTENSION_get_critical(ex);
167 if (BIO_printf(bp, ": %s\n", j ? "critical" : "") <= 0)
168 return 0;
169 if (!X509V3_EXT_print(bp, ex, flag, indent + 4)) {
170 BIO_printf(bp, "%*s", indent + 4, "");
171 ASN1_STRING_print(bp, X509_EXTENSION_get_data(ex));
172 }
173 if (BIO_write(bp, "\n", 1) <= 0)
174 return 0;
175 }
176 return 1;
177 }
178
unknown_ext_print(BIO * out,const unsigned char * ext,int extlen,unsigned long flag,int indent,int supported)179 static int unknown_ext_print(BIO *out, const unsigned char *ext, int extlen,
180 unsigned long flag, int indent, int supported)
181 {
182 switch (flag & X509V3_EXT_UNKNOWN_MASK) {
183
184 case X509V3_EXT_DEFAULT:
185 return 0;
186
187 case X509V3_EXT_ERROR_UNKNOWN:
188 if (supported)
189 BIO_printf(out, "%*s<Parse Error>", indent, "");
190 else
191 BIO_printf(out, "%*s<Not Supported>", indent, "");
192 return 1;
193
194 case X509V3_EXT_PARSE_UNKNOWN:
195 return ASN1_parse_dump(out, ext, extlen, indent, -1);
196 case X509V3_EXT_DUMP_UNKNOWN:
197 return BIO_dump_indent(out, (const char *)ext, extlen, indent);
198
199 default:
200 return 1;
201 }
202 }
203
204 #ifndef OPENSSL_NO_STDIO
X509V3_EXT_print_fp(FILE * fp,X509_EXTENSION * ext,int flag,int indent)205 int X509V3_EXT_print_fp(FILE *fp, X509_EXTENSION *ext, int flag, int indent)
206 {
207 BIO *bio_tmp;
208 int ret;
209
210 if ((bio_tmp = BIO_new_fp(fp, BIO_NOCLOSE)) == NULL)
211 return 0;
212 ret = X509V3_EXT_print(bio_tmp, ext, flag, indent);
213 BIO_free(bio_tmp);
214 return ret;
215 }
216 #endif
217