crypto/asn1/a_print.c

   1 /*
   2  * Copyright 1995-2017 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 #include <stdio.h>
  11 #include "crypto/ctype.h"
  12 #include "internal/cryptlib.h"
  13 #include <openssl/asn1.h>
  14
  15 int ASN1_PRINTABLE_type(const unsigned char *s, int len)
  16 {
  17     int c;
  18     int ia5 = 0;
  19     int t61 = 0;
  20
  21     if (len <= 0)
  22         len = -1;
  23     if (s == NULL)
  24         return V_ASN1_PRINTABLESTRING;
  25
  26     while ((*s) && (len-- != 0)) {
  27         c = *(s++);
  28         if (!ossl_isasn1print(c))
  29             ia5 = 1;
  30         if (!ossl_isascii(c))
  31             t61 = 1;
  32     }
  33     if (t61)
  34         return V_ASN1_T61STRING;
  35     if (ia5)
  36         return V_ASN1_IA5STRING;
  37     return V_ASN1_PRINTABLESTRING;
  38 }
  39
  40 int ASN1_UNIVERSALSTRING_to_string(ASN1_UNIVERSALSTRING *s)
  41 {
  42     int i;
  43     unsigned char *p;
  44
  45     if (s->type != V_ASN1_UNIVERSALSTRING)
  46         return 0;
  47     if ((s->length % 4) != 0)
  48         return 0;
  49     p = s->data;
  50     for (i = 0; i < s->length; i += 4) {
  51         if ((p[0] != '\0') || (p[1] != '\0') || (p[2] != '\0'))
  52             break;
  53         else
  54             p += 4;
  55     }
  56     if (i < s->length)
  57         return 0;
  58     p = s->data;
  59     for (i = 3; i < s->length; i += 4) {
  60         *(p++) = s->data[i];
  61     }
  62     *(p) = '\0';
  63     s->length /= 4;
  64     s->type = ASN1_PRINTABLE_type(s->data, s->length);
  65     return 1;
  66 }
  67
  68 int ASN1_STRING_print(BIO *bp, const ASN1_STRING *v)
  69 {
  70     int i, n;
  71     char buf[80];
  72     const char *p;
  73
  74     if (v == NULL)
  75         return 0;
  76     n = 0;
  77     p = (const char *)v->data;
  78     for (i = 0; i < v->length; i++) {
  79         if ((p[i] > '~') || ((p[i] < ' ') &&
  80                              (p[i] != '\n') && (p[i] != '\r')))
  81             buf[n] = '.';
  82         else
  83             buf[n] = p[i];
  84         n++;
  85         if (n >= 80) {
  86             if (BIO_write(bp, buf, n) <= 0)
  87                 return 0;
  88             n = 0;
  89         }
  90     }
  91     if (n > 0)
  92         if (BIO_write(bp, buf, n) <= 0)
  93             return 0;
  94     return 1;
  95 }