/* crypto/x509/x509_obj.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 <stdio.h>

#include "cryptlib.h"

#include <openssl/lhash.h>

#include <openssl/objects.h>

#include <openssl/x509.h>

#include <openssl/buffer.h>

/*

 * Limit to ensure we don't overflow: much greater than

 * anything enountered in practice.

 */

#define NAME_ONELINE_MAX    (1024 * 1024)

char *X509_NAME_oneline(X509_NAME *a, char *buf, int len)

{

    X509_NAME_ENTRY *ne;

    int i;

    int n, lold, l, l1, l2, num, j, type;

    const char *s;

    char *p;

    unsigned char *q;

    BUF_MEM *b = NULL;

    static const char hex[17] = "0123456789ABCDEF";

    int gs_doit[4];

    char tmp_buf[80];

#ifdef CHARSET_EBCDIC

    char ebcdic_buf[1024];

#endif

    if (buf == NULL) {

        if ((b = BUF_MEM_new()) == NULL)

            goto err;

        if (!BUF_MEM_grow(b, 200))

            goto err;

        b->data[0] = '\0';

        len = 200;

    } else if (len == 0) {

        return NULL;

    }

    if (a == NULL) {

        if (b) {

            buf = b->data;

            OPENSSL_free(b);

        }

        strncpy(buf, "NO X509_NAME", len);

        buf[len - 1] = '\0';

        return buf;

    }

    len--;                      /* space for '\0' */

    l = 0;

    for (i = 0; i < sk_X509_NAME_ENTRY_num(a->entries); i++) {

        ne = sk_X509_NAME_ENTRY_value(a->entries, i);

        n = OBJ_obj2nid(ne->object);

        if ((n == NID_undef) || ((s = OBJ_nid2sn(n)) == NULL)) {

            i2t_ASN1_OBJECT(tmp_buf, sizeof(tmp_buf), ne->object);

            s = tmp_buf;

        }

        l1 = strlen(s);

        type = ne->value->type;

        num = ne->value->length;

        if (num > NAME_ONELINE_MAX) {

            X509err(X509_F_X509_NAME_ONELINE, X509_R_NAME_TOO_LONG);

            goto end;

        }

        q = ne->value->data;

#ifdef CHARSET_EBCDIC

        if (type == V_ASN1_GENERALSTRING ||

            type == V_ASN1_VISIBLESTRING ||

            type == V_ASN1_PRINTABLESTRING ||

            type == V_ASN1_TELETEXSTRING ||

            type == V_ASN1_IA5STRING) {

            if (num > (int)sizeof(ebcdic_buf))

                num = sizeof(ebcdic_buf);

            ascii2ebcdic(ebcdic_buf, q, num);

            q = ebcdic_buf;

        }

#endif

        if ((type == V_ASN1_GENERALSTRING) && ((num % 4) == 0)) {

            gs_doit[0] = gs_doit[1] = gs_doit[2] = gs_doit[3] = 0;

            for (j = 0; j < num; j++)

                if (q[j] != 0)

                    gs_doit[j & 3] = 1;

            if (gs_doit[0] | gs_doit[1] | gs_doit[2])

                gs_doit[0] = gs_doit[1] = gs_doit[2] = gs_doit[3] = 1;

            else {

                gs_doit[0] = gs_doit[1] = gs_doit[2] = 0;

                gs_doit[3] = 1;

            }

        } else

            gs_doit[0] = gs_doit[1] = gs_doit[2] = gs_doit[3] = 1;

        for (l2 = j = 0; j < num; j++) {

            if (!gs_doit[j & 3])

                continue;

            l2++;

#ifndef CHARSET_EBCDIC

            if ((q[j] < ' ') || (q[j] > '~'))

                l2 += 3;

#else

            if ((os_toascii[q[j]] < os_toascii[' ']) ||

                (os_toascii[q[j]] > os_toascii['~']))

                l2 += 3;

#endif

        }

        lold = l;

        l += 1 + l1 + 1 + l2;

        if (l > NAME_ONELINE_MAX) {

            X509err(X509_F_X509_NAME_ONELINE, X509_R_NAME_TOO_LONG);

            goto end;

        }

        if (b != NULL) {

            if (!BUF_MEM_grow(b, l + 1))

                goto err;

            p = &(b->data[lold]);

        } else if (l > len) {

            break;

        } else

            p = &(buf[lold]);

        *(p++) = '/';

        memcpy(p, s, (unsigned int)l1);

        p += l1;

        *(p++) = '=';

#ifndef CHARSET_EBCDIC          /* q was assigned above already. */

        q = ne->value->data;

#endif

        for (j = 0; j < num; j++) {

            if (!gs_doit[j & 3])

                continue;

#ifndef CHARSET_EBCDIC

            n = q[j];

            if ((n < ' ') || (n > '~')) {

                *(p++) = '\\';

                *(p++) = 'x';

                *(p++) = hex[(n >> 4) & 0x0f];

                *(p++) = hex[n & 0x0f];

            } else

                *(p++) = n;

#else

            n = os_toascii[q[j]];

            if ((n < os_toascii[' ']) || (n > os_toascii['~'])) {

                *(p++) = '\\';

                *(p++) = 'x';

                *(p++) = hex[(n >> 4) & 0x0f];

                *(p++) = hex[n & 0x0f];

            } else

                *(p++) = q[j];

#endif

        }

        *p = '\0';

    }

    if (b != NULL) {

        p = b->data;

        OPENSSL_free(b);

    } else

        p = buf;

    if (i == 0)

        *p = '\0';

    return (p);

 err:

    X509err(X509_F_X509_NAME_ONELINE, ERR_R_MALLOC_FAILURE);

 end:

    BUF_MEM_free(b);

    return (NULL);

}