crypto/x509/v3_prn.c

   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
  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
  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
 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
 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
 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