| /* 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 i2a_ASN1_INTEGER(BIO *bp, ASN1_INTEGER *a) |
| { |
| int i, n = 0; |
| static const char *h = "0123456789ABCDEF"; |
| char buf[2]; |
| |
| if (a == NULL) |
| return (0); |
| |
| if (a->type & V_ASN1_NEG) { |
| if (BIO_write(bp, "-", 1) != 1) |
| goto err; |
| n = 1; |
| } |
| |
| if (a->length == 0) { |
| if (BIO_write(bp, "00", 2) != 2) |
| goto err; |
| n += 2; |
| } 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_INTEGER(BIO *bp, ASN1_INTEGER *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; |
| |
| bs->type = V_ASN1_INTEGER; |
| |
| bufsize = BIO_gets(bp, buf, size); |
| for (;;) { |
| if (bufsize < 1) |
| goto err_sl; |
| 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 = 0; j < i; j++) { |
| if (!(((buf[j] >= '0') && (buf[j] <= '9')) || |
| ((buf[j] >= 'a') && (buf[j] <= 'f')) || |
| ((buf[j] >= 'A') && (buf[j] <= 'F')))) { |
| 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; |
| if (first) { |
| first = 0; |
| if ((bufp[0] == '0') && (buf[1] == '0')) { |
| bufp += 2; |
| i -= 2; |
| } |
| } |
| k = 0; |
| i -= again; |
| if (i % 2 != 0) { |
| OPENSSL_PUT_ERROR(ASN1, 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 = OPENSSL_realloc_clean(s, slen, num + i * 2); |
| if (sp == NULL) { |
| OPENSSL_PUT_ERROR(ASN1, 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 { |
| OPENSSL_PUT_ERROR(ASN1, 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: |
| OPENSSL_PUT_ERROR(ASN1, ASN1_R_SHORT_LINE); |
| } |
| if (s != NULL) |
| OPENSSL_free(s); |
| return (ret); |
| } |
