boringssl/crypto/asn1/a_print.c

/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 *
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 *
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 *
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.] */

#include <openssl/asn1.h>

#include <openssl/err.h>
#include <openssl/mem.h>

int ASN1_PRINTABLE_type(const unsigned char *s, int len)
{
    int c;
    int ia5 = 0;
    int t61 = 0;

    if (len <= 0)
        len = -1;
    if (s == NULL)
        return (V_ASN1_PRINTABLESTRING);

    while ((*s) && (len-- != 0)) {
        c = *(s++);
        if (!(((c >= 'a') && (c <= 'z')) ||
              ((c >= 'A') && (c <= 'Z')) ||
              (c == ' ') ||
              ((c >= '0') && (c <= '9')) ||
              (c == ' ') || (c == '\'') ||
              (c == '(') || (c == ')') ||
              (c == '+') || (c == ',') ||
              (c == '-') || (c == '.') ||
              (c == '/') || (c == ':') || (c == '=') || (c == '?')))
            ia5 = 1;
        if (c & 0x80)
            t61 = 1;
    }
    if (t61)
        return (V_ASN1_T61STRING);
    if (ia5)
        return (V_ASN1_IA5STRING);
    return (V_ASN1_PRINTABLESTRING);
}

int ASN1_UNIVERSALSTRING_to_string(ASN1_UNIVERSALSTRING *s)
{
    int i;
    unsigned char *p;

    if (s->type != V_ASN1_UNIVERSALSTRING)
        return (0);
    if ((s->length % 4) != 0)
        return (0);
    p = s->data;
    for (i = 0; i < s->length; i += 4) {
        if ((p[0] != '\0') || (p[1] != '\0') || (p[2] != '\0'))
            break;
        else
            p += 4;
    }
    if (i < s->length)
        return (0);
    p = s->data;
    for (i = 3; i < s->length; i += 4) {
        *(p++) = s->data[i];
    }
    *(p) = '\0';
    s->length /= 4;
    s->type = ASN1_PRINTABLE_type(s->data, s->length);
    return (1);
}