t_pkey.c revision 296341 
1/* crypto/asn1/t_pkey.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to.  The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 *    notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 *    notice, this list of conditions and the following disclaimer in the
30 *    documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 *    must display the following acknowledgement:
33 *    "This product includes cryptographic software written by
34 *     Eric Young (eay@cryptsoft.com)"
35 *    The word 'cryptographic' can be left out if the rouines from the library
36 *    being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 *    the apps directory (application code) you must include an acknowledgement:
39 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed.  i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59#include <stdio.h>
60#include "cryptlib.h"
61#include <openssl/objects.h>
62#include <openssl/buffer.h>
63#include <openssl/bn.h>
64
65int ASN1_bn_print(BIO *bp, const char *number, const BIGNUM *num,
66                  unsigned char *buf, int off)
67{
68    int n, i;
69    const char *neg;
70
71    if (num == NULL)
72        return (1);
73    neg = (BN_is_negative(num)) ? "-" : "";
74    if (!BIO_indent(bp, off, 128))
75        return 0;
76    if (BN_is_zero(num)) {
77        if (BIO_printf(bp, "%s 0\n", number) <= 0)
78            return 0;
79        return 1;
80    }
81
82    if (BN_num_bytes(num) <= BN_BYTES) {
83        if (BIO_printf(bp, "%s %s%lu (%s0x%lx)\n", number, neg,
84                       (unsigned long)num->d[0], neg,
85                       (unsigned long)num->d[0])
86            <= 0)
87            return (0);
88    } else {
89        buf[0] = 0;
90        if (BIO_printf(bp, "%s%s", number,
91                       (neg[0] == '-') ? " (Negative)" : "") <= 0)
92            return (0);
93        n = BN_bn2bin(num, &buf[1]);
94
95        if (buf[1] & 0x80)
96            n++;
97        else
98            buf++;
99
100        for (i = 0; i < n; i++) {
101            if ((i % 15) == 0) {
102                if (BIO_puts(bp, "\n") <= 0 || !BIO_indent(bp, off + 4, 128))
103                    return 0;
104            }
105            if (BIO_printf(bp, "%02x%s", buf[i], ((i + 1) == n) ? "" : ":")
106                <= 0)
107                return (0);
108        }
109        if (BIO_write(bp, "\n", 1) <= 0)
110            return (0);
111    }
112    return (1);
113}
114