/* crypto/asn1/f_string.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/buffer.h>
#include <openssl/asn1.h>
int i2a_ASN1_STRING(BIO *bp, ASN1_STRING *a, int type)
{
int i, n = 0;
static const char *h = "0123456789ABCDEF";
char buf[2];
if (a == NULL)
return (0);
if (a->length == 0) {
if (BIO_write(bp, "0", 1) != 1)
goto err;
n = 1;
} else {
for (i = 0; i < a->length; i++) {
if ((i != 0) && (i % 35 == 0)) {
if (BIO_write(bp, "\\\n", 2) != 2)
goto err;
n += 2;
}
buf[0] = h[((unsigned char)a->data[i] >> 4) & 0x0f];
buf[1] = h[((unsigned char)a->data[i]) & 0x0f];
if (BIO_write(bp, buf, 2) != 2)
goto err;
n += 2;
}
}
return (n);
err:
return (-1);
}
int a2i_ASN1_STRING(BIO *bp, ASN1_STRING *bs, char *buf, int size)
{
int ret = 0;
int i, j, k, m, n, again, bufsize;
unsigned char *s = NULL, *sp;
unsigned char *bufp;
int num = 0, slen = 0, first = 1;
bufsize = BIO_gets(bp, buf, size);
for (;;) {
if (bufsize < 1) {
if (first)
break;
else
goto err_sl;
}
first = 0;
i = bufsize;
if (buf[i - 1] == '\n')
buf[--i] = '\0';
if (i == 0)
goto err_sl;
if (buf[i - 1] == '\r')
buf[--i] = '\0';
if (i == 0)
goto err_sl;
again = (buf[i - 1] == '\\');
for (j = i - 1; j > 0; j--) {
#ifndef CHARSET_EBCDIC
if (!(((buf[j] >= '0') && (buf[j] <= '9')) ||
((buf[j] >= 'a') && (buf[j] <= 'f')) ||
((buf[j] >= 'A') && (buf[j] <= 'F'))))
#else
/*
* This #ifdef is not strictly necessary, since the characters
* A...F a...f 0...9 are contiguous (yes, even in EBCDIC - but
* not the whole alphabet). Nevertheless, isxdigit() is faster.
*/
if (!isxdigit(buf[j]))
#endif
{
i = j;
break;
}
}
buf[i] = '\0';
/*
* We have now cleared all the crap off the end of the line
*/
if (i < 2)
goto err_sl;
bufp = (unsigned char *)buf;
k = 0;
i -= again;
if (i % 2 != 0) {
ASN1err(ASN1_F_A2I_ASN1_STRING, ASN1_R_ODD_NUMBER_OF_CHARS);
goto err;
}
i /= 2;
if (num + i > slen) {
if (s == NULL)
sp = (unsigned char *)OPENSSL_malloc((unsigned int)num +
i * 2);
else
sp = (unsigned char *)OPENSSL_realloc(s,
(unsigned int)num +
i * 2);
if (sp == NULL) {
ASN1err(ASN1_F_A2I_ASN1_STRING, ERR_R_MALLOC_FAILURE);
goto err;
}
s = sp;
slen = num + i * 2;
}
for (j = 0; j < i; j++, k += 2) {
for (n = 0; n < 2; n++) {
m = bufp[k + n];
if ((m >= '0') && (m <= '9'))
m -= '0';
else if ((m >= 'a') && (m <= 'f'))
m = m - 'a' + 10;
else if ((m >= 'A') && (m <= 'F'))
m = m - 'A' + 10;
else {
ASN1err(ASN1_F_A2I_ASN1_STRING,
ASN1_R_NON_HEX_CHARACTERS);
goto err;
}
s[num + j] <<= 4;
s[num + j] |= m;
}
}
num += i;
if (again)
bufsize = BIO_gets(bp, buf, size);
else
break;
}
bs->length = num;
bs->data = s;
ret = 1;
err:
if (0) {
err_sl:
ASN1err(ASN1_F_A2I_ASN1_STRING, ASN1_R_SHORT_LINE);
}
if (ret != 1)
OPENSSL_free(s);
return (ret);
}
