crypto/x509/x509_obj.c

   1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   2  * All rights reserved.
   3  *
   4  * This package is an SSL implementation written
   5  * by Eric Young (eay@cryptsoft.com).
   6  * The implementation was written so as to conform with Netscapes SSL.
   7  *
   8  * This library is free for commercial and non-commercial use as long as
   9  * the following conditions are aheared to.  The following conditions
  10  * apply to all code found in this distribution, be it the RC4, RSA,
  11  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  12  * included with this distribution is covered by the same copyright terms
  13  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  14  *
  15  * Copyright remains Eric Young's, and as such any Copyright notices in
  16  * the code are not to be removed.
  17  * If this package is used in a product, Eric Young should be given attribution
  18  * as the author of the parts of the library used.
  19  * This can be in the form of a textual message at program startup or
  20  * in documentation (online or textual) provided with the package.
  21  *
  22  * Redistribution and use in source and binary forms, with or without
  23  * modification, are permitted provided that the following conditions
  24  * are met:
  25  * 1. Redistributions of source code must retain the copyright
  26  *    notice, this list of conditions and the following disclaimer.
  27  * 2. Redistributions in binary form must reproduce the above copyright
  28  *    notice, this list of conditions and the following disclaimer in the
  29  *    documentation and/or other materials provided with the distribution.
  30  * 3. All advertising materials mentioning features or use of this software
  31  *    must display the following acknowledgement:
  32  *    "This product includes cryptographic software written by
  33  *     Eric Young (eay@cryptsoft.com)"
  34  *    The word 'cryptographic' can be left out if the rouines from the library
  35  *    being used are not cryptographic related :-).
  36  * 4. If you include any Windows specific code (or a derivative thereof) from
  37  *    the apps directory (application code) you must include an acknowledgement:
  38  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  41  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  43  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  44  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  45  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  46  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  48  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  49  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  50  * SUCH DAMAGE.
  51  *
  52  * The licence and distribution terms for any publically available version or
  53  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  54  * copied and put under another distribution licence
  55  * [including the GNU Public Licence.]
  56  */
  57
  58 #include <stdio.h>
  59 #include "internal/cryptlib.h"
  60 #include <openssl/lhash.h>
  61 #include <openssl/objects.h>
  62 #include <openssl/x509.h>
  63 #include <openssl/buffer.h>
  64 #include "internal/x509_int.h"
  65
  66 /*
  67  * Limit to ensure we don't overflow: much greater than
  68  * anything enountered in practice.
  69  */
  70
  71 #define NAME_ONELINE_MAX    (1024 * 1024)
  72
  73 char *X509_NAME_oneline(X509_NAME *a, char *buf, int len)
  74 {
  75     X509_NAME_ENTRY *ne;
  76     int i;
  77     int n, lold, l, l1, l2, num, j, type;
  78     const char *s;
  79     char *p;
  80     unsigned char *q;
  81     BUF_MEM *b = NULL;
  82     static const char hex[17] = "0123456789ABCDEF";
  83     int gs_doit[4];
  84     char tmp_buf[80];
  85 #ifdef CHARSET_EBCDIC
  86     unsigned char ebcdic_buf[1024];
  87 #endif
  88
  89     if (buf == NULL) {
  90         if ((b = BUF_MEM_new()) == NULL)
  91             goto err;
  92         if (!BUF_MEM_grow(b, 200))
  93             goto err;
  94         b->data[0] = '\0';
  95         len = 200;
  96     } else if (len == 0) {
  97         return NULL;
  98     }
  99     if (a == NULL) {
 100         if (b) {
 101             buf = b->data;
 102             OPENSSL_free(b);
 103         }
 104         strncpy(buf, "NO X509_NAME", len);
 105         buf[len - 1] = '\0';
 106         return buf;
 107     }
 108
 109     len--;                      /* space for '\0' */
 110     l = 0;
 111     for (i = 0; i < sk_X509_NAME_ENTRY_num(a->entries); i++) {
 112         ne = sk_X509_NAME_ENTRY_value(a->entries, i);
 113         n = OBJ_obj2nid(ne->object);
 114         if ((n == NID_undef) || ((s = OBJ_nid2sn(n)) == NULL)) {
 115             i2t_ASN1_OBJECT(tmp_buf, sizeof(tmp_buf), ne->object);
 116             s = tmp_buf;
 117         }
 118         l1 = strlen(s);
 119
 120         type = ne->value->type;
 121         num = ne->value->length;
 122         if (num > NAME_ONELINE_MAX) {
 123             X509err(X509_F_X509_NAME_ONELINE, X509_R_NAME_TOO_LONG);
 124             goto end;
 125         }
 126         q = ne->value->data;
 127 #ifdef CHARSET_EBCDIC
 128         if (type == V_ASN1_GENERALSTRING ||
 129             type == V_ASN1_VISIBLESTRING ||
 130             type == V_ASN1_PRINTABLESTRING ||
 131             type == V_ASN1_TELETEXSTRING ||
 132             type == V_ASN1_VISIBLESTRING || type == V_ASN1_IA5STRING) {
 133             ascii2ebcdic(ebcdic_buf, q, (num > (int)sizeof(ebcdic_buf))
 134                          ? (int)sizeof(ebcdic_buf) : num);
 135             q = ebcdic_buf;
 136         }
 137 #endif
 138
 139         if ((type == V_ASN1_GENERALSTRING) && ((num % 4) == 0)) {
 140             gs_doit[0] = gs_doit[1] = gs_doit[2] = gs_doit[3] = 0;
 141             for (j = 0; j < num; j++)
 142                 if (q[j] != 0)
 143                     gs_doit[j & 3] = 1;
 144
 145             if (gs_doit[0] | gs_doit[1] | gs_doit[2])
 146                 gs_doit[0] = gs_doit[1] = gs_doit[2] = gs_doit[3] = 1;
 147             else {
 148                 gs_doit[0] = gs_doit[1] = gs_doit[2] = 0;
 149                 gs_doit[3] = 1;
 150             }
 151         } else
 152             gs_doit[0] = gs_doit[1] = gs_doit[2] = gs_doit[3] = 1;
 153
 154         for (l2 = j = 0; j < num; j++) {
 155             if (!gs_doit[j & 3])
 156                 continue;
 157             l2++;
 158 #ifndef CHARSET_EBCDIC
 159             if ((q[j] < ' ') || (q[j] > '~'))
 160                 l2 += 3;
 161 #else
 162             if ((os_toascii[q[j]] < os_toascii[' ']) ||
 163                 (os_toascii[q[j]] > os_toascii['~']))
 164                 l2 += 3;
 165 #endif
 166         }
 167
 168         lold = l;
 169         l += 1 + l1 + 1 + l2;
 170         if (l > NAME_ONELINE_MAX) {
 171             X509err(X509_F_X509_NAME_ONELINE, X509_R_NAME_TOO_LONG);
 172             goto end;
 173         }
 174         if (b != NULL) {
 175             if (!BUF_MEM_grow(b, l + 1))
 176                 goto err;
 177             p = &(b->data[lold]);
 178         } else if (l > len) {
 179             break;
 180         } else
 181             p = &(buf[lold]);
 182         *(p++) = '/';
 183         memcpy(p, s, (unsigned int)l1);
 184         p += l1;
 185         *(p++) = '=';
 186
 187 #ifndef CHARSET_EBCDIC          /* q was assigned above already. */
 188         q = ne->value->data;
 189 #endif
 190
 191         for (j = 0; j < num; j++) {
 192             if (!gs_doit[j & 3])
 193                 continue;
 194 #ifndef CHARSET_EBCDIC
 195             n = q[j];
 196             if ((n < ' ') || (n > '~')) {
 197                 *(p++) = '\\';
 198                 *(p++) = 'x';
 199                 *(p++) = hex[(n >> 4) & 0x0f];
 200                 *(p++) = hex[n & 0x0f];
 201             } else
 202                 *(p++) = n;
 203 #else
 204             n = os_toascii[q[j]];
 205             if ((n < os_toascii[' ']) || (n > os_toascii['~'])) {
 206                 *(p++) = '\\';
 207                 *(p++) = 'x';
 208                 *(p++) = hex[(n >> 4) & 0x0f];
 209                 *(p++) = hex[n & 0x0f];
 210             } else
 211                 *(p++) = q[j];
 212 #endif
 213         }
 214         *p = '\0';
 215     }
 216     if (b != NULL) {
 217         p = b->data;
 218         OPENSSL_free(b);
 219     } else
 220         p = buf;
 221     if (i == 0)
 222         *p = '\0';
 223     return (p);
 224  err:
 225     X509err(X509_F_X509_NAME_ONELINE, ERR_R_MALLOC_FAILURE);
 226  end:
 227     BUF_MEM_free(b);
 228     return (NULL);
 229 }