[331] | 1 | /*
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| 2 | * Copyright 1999-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | /* X509 v3 extension utilities */
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| 11 |
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| 12 | #include <stdio.h>
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| 13 | #include "internal/cryptlib.h"
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| 14 | #include <openssl/conf.h>
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| 15 | #include <openssl/x509v3.h>
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| 16 |
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| 17 | /* Extension printing routines */
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| 18 |
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| 19 | static int unknown_ext_print(BIO *out, const unsigned char *ext, int extlen,
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| 20 | unsigned long flag, int indent, int supported);
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| 21 |
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| 22 | /* Print out a name+value stack */
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| 23 |
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| 24 | void X509V3_EXT_val_prn(BIO *out, STACK_OF(CONF_VALUE) *val, int indent,
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| 25 | int ml)
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| 26 | {
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| 27 | int i;
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| 28 | CONF_VALUE *nval;
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| 29 | if (!val)
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| 30 | return;
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| 31 | if (!ml || !sk_CONF_VALUE_num(val)) {
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| 32 | BIO_printf(out, "%*s", indent, "");
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| 33 | if (!sk_CONF_VALUE_num(val))
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| 34 | BIO_puts(out, "<EMPTY>\n");
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| 35 | }
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| 36 | for (i = 0; i < sk_CONF_VALUE_num(val); i++) {
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| 37 | if (ml)
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| 38 | BIO_printf(out, "%*s", indent, "");
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| 39 | else if (i > 0)
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| 40 | BIO_printf(out, ", ");
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| 41 | nval = sk_CONF_VALUE_value(val, i);
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| 42 | if (!nval->name)
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| 43 | BIO_puts(out, nval->value);
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| 44 | else if (!nval->value)
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| 45 | BIO_puts(out, nval->name);
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| 46 | #ifndef CHARSET_EBCDIC
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| 47 | else
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| 48 | BIO_printf(out, "%s:%s", nval->name, nval->value);
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| 49 | #else
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| 50 | else {
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| 51 | int len;
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| 52 | char *tmp;
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| 53 | len = strlen(nval->value) + 1;
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| 54 | tmp = OPENSSL_malloc(len);
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| 55 | if (tmp != NULL) {
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| 56 | ascii2ebcdic(tmp, nval->value, len);
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| 57 | BIO_printf(out, "%s:%s", nval->name, tmp);
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| 58 | OPENSSL_free(tmp);
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| 59 | }
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| 60 | }
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| 61 | #endif
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| 62 | if (ml)
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| 63 | BIO_puts(out, "\n");
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| 64 | }
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| 65 | }
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| 66 |
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| 67 | /* Main routine: print out a general extension */
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| 68 |
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| 69 | int X509V3_EXT_print(BIO *out, X509_EXTENSION *ext, unsigned long flag,
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| 70 | int indent)
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| 71 | {
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| 72 | void *ext_str = NULL;
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| 73 | char *value = NULL;
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| 74 | ASN1_OCTET_STRING *extoct;
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| 75 | const unsigned char *p;
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| 76 | int extlen;
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| 77 | const X509V3_EXT_METHOD *method;
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| 78 | STACK_OF(CONF_VALUE) *nval = NULL;
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| 79 | int ok = 1;
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| 80 |
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| 81 | extoct = X509_EXTENSION_get_data(ext);
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| 82 | p = ASN1_STRING_get0_data(extoct);
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| 83 | extlen = ASN1_STRING_length(extoct);
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| 84 |
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| 85 | if ((method = X509V3_EXT_get(ext)) == NULL)
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| 86 | return unknown_ext_print(out, p, extlen, flag, indent, 0);
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| 87 | if (method->it)
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| 88 | ext_str = ASN1_item_d2i(NULL, &p, extlen, ASN1_ITEM_ptr(method->it));
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| 89 | else
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| 90 | ext_str = method->d2i(NULL, &p, extlen);
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| 91 |
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| 92 | if (!ext_str)
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| 93 | return unknown_ext_print(out, p, extlen, flag, indent, 1);
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| 94 |
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| 95 | if (method->i2s) {
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| 96 | if ((value = method->i2s(method, ext_str)) == NULL) {
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| 97 | ok = 0;
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| 98 | goto err;
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| 99 | }
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| 100 | #ifndef CHARSET_EBCDIC
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| 101 | BIO_printf(out, "%*s%s", indent, "", value);
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| 102 | #else
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| 103 | {
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| 104 | int len;
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| 105 | char *tmp;
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| 106 | len = strlen(value) + 1;
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| 107 | tmp = OPENSSL_malloc(len);
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| 108 | if (tmp != NULL) {
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| 109 | ascii2ebcdic(tmp, value, len);
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| 110 | BIO_printf(out, "%*s%s", indent, "", tmp);
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| 111 | OPENSSL_free(tmp);
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| 112 | }
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| 113 | }
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| 114 | #endif
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| 115 | } else if (method->i2v) {
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| 116 | if ((nval = method->i2v(method, ext_str, NULL)) == NULL) {
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| 117 | ok = 0;
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| 118 | goto err;
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| 119 | }
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| 120 | X509V3_EXT_val_prn(out, nval, indent,
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| 121 | method->ext_flags & X509V3_EXT_MULTILINE);
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| 122 | } else if (method->i2r) {
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| 123 | if (!method->i2r(method, ext_str, out, indent))
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| 124 | ok = 0;
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| 125 | } else
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| 126 | ok = 0;
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| 127 |
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| 128 | err:
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| 129 | sk_CONF_VALUE_pop_free(nval, X509V3_conf_free);
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| 130 | OPENSSL_free(value);
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| 131 | if (method->it)
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| 132 | ASN1_item_free(ext_str, ASN1_ITEM_ptr(method->it));
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| 133 | else
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| 134 | method->ext_free(ext_str);
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| 135 | return ok;
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| 136 | }
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| 137 |
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| 138 | int X509V3_extensions_print(BIO *bp, const char *title,
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| 139 | const STACK_OF(X509_EXTENSION) *exts,
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| 140 | unsigned long flag, int indent)
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| 141 | {
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| 142 | int i, j;
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| 143 |
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| 144 | if (sk_X509_EXTENSION_num(exts) <= 0)
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| 145 | return 1;
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| 146 |
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| 147 | if (title) {
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| 148 | BIO_printf(bp, "%*s%s:\n", indent, "", title);
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| 149 | indent += 4;
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| 150 | }
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| 151 |
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| 152 | for (i = 0; i < sk_X509_EXTENSION_num(exts); i++) {
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| 153 | ASN1_OBJECT *obj;
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| 154 | X509_EXTENSION *ex;
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| 155 | ex = sk_X509_EXTENSION_value(exts, i);
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| 156 | if (indent && BIO_printf(bp, "%*s", indent, "") <= 0)
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| 157 | return 0;
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| 158 | obj = X509_EXTENSION_get_object(ex);
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| 159 | i2a_ASN1_OBJECT(bp, obj);
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| 160 | j = X509_EXTENSION_get_critical(ex);
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| 161 | if (BIO_printf(bp, ": %s\n", j ? "critical" : "") <= 0)
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| 162 | return 0;
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| 163 | if (!X509V3_EXT_print(bp, ex, flag, indent + 4)) {
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| 164 | BIO_printf(bp, "%*s", indent + 4, "");
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| 165 | ASN1_STRING_print(bp, X509_EXTENSION_get_data(ex));
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| 166 | }
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| 167 | if (BIO_write(bp, "\n", 1) <= 0)
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| 168 | return 0;
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| 169 | }
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| 170 | return 1;
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| 171 | }
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| 172 |
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| 173 | static int unknown_ext_print(BIO *out, const unsigned char *ext, int extlen,
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| 174 | unsigned long flag, int indent, int supported)
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| 175 | {
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| 176 | switch (flag & X509V3_EXT_UNKNOWN_MASK) {
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| 177 |
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| 178 | case X509V3_EXT_DEFAULT:
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| 179 | return 0;
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| 180 |
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| 181 | case X509V3_EXT_ERROR_UNKNOWN:
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| 182 | if (supported)
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| 183 | BIO_printf(out, "%*s<Parse Error>", indent, "");
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| 184 | else
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| 185 | BIO_printf(out, "%*s<Not Supported>", indent, "");
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| 186 | return 1;
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| 187 |
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| 188 | case X509V3_EXT_PARSE_UNKNOWN:
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| 189 | return ASN1_parse_dump(out, ext, extlen, indent, -1);
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| 190 | case X509V3_EXT_DUMP_UNKNOWN:
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| 191 | return BIO_dump_indent(out, (const char *)ext, extlen, indent);
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| 192 |
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| 193 | default:
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| 194 | return 1;
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| 195 | }
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| 196 | }
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| 197 |
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| 198 | #ifndef OPENSSL_NO_STDIO
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| 199 | int X509V3_EXT_print_fp(FILE *fp, X509_EXTENSION *ext, int flag, int indent)
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| 200 | {
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| 201 | BIO *bio_tmp;
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| 202 | int ret;
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| 203 |
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| 204 | if ((bio_tmp = BIO_new_fp(fp, BIO_NOCLOSE)) == NULL)
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| 205 | return 0;
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| 206 | ret = X509V3_EXT_print(bio_tmp, ext, flag, indent);
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| 207 | BIO_free(bio_tmp);
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| 208 | return ret;
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| 209 | }
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| 210 | #endif
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