216 lines
7.3 KiB
C
216 lines
7.3 KiB
C
/* crypto/asn1/f_int.c */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#include <stdio.h>
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#include "cryptlib.h"
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#include <openssl/buffer.h>
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#include <openssl/asn1.h>
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int i2a_ASN1_INTEGER(BIO *bp, ASN1_INTEGER *a)
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{
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int i, n = 0;
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static const char *h = "0123456789ABCDEF";
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char buf[2];
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if (a == NULL)
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return (0);
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if (a->type & V_ASN1_NEG) {
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if (BIO_write(bp, "-", 1) != 1)
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goto err;
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n = 1;
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}
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if (a->length == 0) {
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if (BIO_write(bp, "00", 2) != 2)
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goto err;
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n += 2;
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} else {
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for (i = 0; i < a->length; i++) {
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if ((i != 0) && (i % 35 == 0)) {
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if (BIO_write(bp, "\\\n", 2) != 2)
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goto err;
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n += 2;
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}
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buf[0] = h[((unsigned char)a->data[i] >> 4) & 0x0f];
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buf[1] = h[((unsigned char)a->data[i]) & 0x0f];
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if (BIO_write(bp, buf, 2) != 2)
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goto err;
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n += 2;
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}
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}
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return (n);
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err:
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return (-1);
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}
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int a2i_ASN1_INTEGER(BIO *bp, ASN1_INTEGER *bs, char *buf, int size)
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{
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int ret = 0;
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int i, j, k, m, n, again, bufsize;
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unsigned char *s = NULL, *sp;
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unsigned char *bufp;
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int num = 0, slen = 0, first = 1;
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bs->type = V_ASN1_INTEGER;
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bufsize = BIO_gets(bp, buf, size);
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for (;;) {
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if (bufsize < 1)
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goto err_sl;
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i = bufsize;
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if (buf[i - 1] == '\n')
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buf[--i] = '\0';
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if (i == 0)
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goto err_sl;
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if (buf[i - 1] == '\r')
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buf[--i] = '\0';
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if (i == 0)
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goto err_sl;
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again = (buf[i - 1] == '\\');
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for (j = 0; j < i; j++) {
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#ifndef CHARSET_EBCDIC
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if (!(((buf[j] >= '0') && (buf[j] <= '9')) ||
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((buf[j] >= 'a') && (buf[j] <= 'f')) ||
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((buf[j] >= 'A') && (buf[j] <= 'F'))))
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#else
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/*
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* This #ifdef is not strictly necessary, since the characters
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* A...F a...f 0...9 are contiguous (yes, even in EBCDIC - but
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* not the whole alphabet). Nevertheless, isxdigit() is faster.
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*/
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if (!isxdigit(buf[j]))
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#endif
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{
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i = j;
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break;
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}
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}
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buf[i] = '\0';
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/*
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* We have now cleared all the crap off the end of the line
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*/
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if (i < 2)
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goto err_sl;
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bufp = (unsigned char *)buf;
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if (first) {
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first = 0;
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if ((bufp[0] == '0') && (buf[1] == '0')) {
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bufp += 2;
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i -= 2;
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}
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}
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k = 0;
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i -= again;
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if (i % 2 != 0) {
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ASN1err(ASN1_F_A2I_ASN1_INTEGER, ASN1_R_ODD_NUMBER_OF_CHARS);
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goto err;
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}
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i /= 2;
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if (num + i > slen) {
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if (s == NULL)
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sp = (unsigned char *)OPENSSL_malloc((unsigned int)num +
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i * 2);
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else
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sp = OPENSSL_realloc_clean(s, slen, num + i * 2);
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if (sp == NULL) {
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ASN1err(ASN1_F_A2I_ASN1_INTEGER, ERR_R_MALLOC_FAILURE);
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if (s != NULL)
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OPENSSL_free(s);
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goto err;
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}
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s = sp;
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slen = num + i * 2;
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}
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for (j = 0; j < i; j++, k += 2) {
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for (n = 0; n < 2; n++) {
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m = bufp[k + n];
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if ((m >= '0') && (m <= '9'))
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m -= '0';
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else if ((m >= 'a') && (m <= 'f'))
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m = m - 'a' + 10;
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else if ((m >= 'A') && (m <= 'F'))
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m = m - 'A' + 10;
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else {
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ASN1err(ASN1_F_A2I_ASN1_INTEGER,
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ASN1_R_NON_HEX_CHARACTERS);
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goto err;
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}
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s[num + j] <<= 4;
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s[num + j] |= m;
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}
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}
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num += i;
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if (again)
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bufsize = BIO_gets(bp, buf, size);
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else
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break;
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}
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bs->length = num;
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bs->data = s;
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ret = 1;
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err:
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if (0) {
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err_sl:
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ASN1err(ASN1_F_A2I_ASN1_INTEGER, ASN1_R_SHORT_LINE);
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}
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return (ret);
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}
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