146 lines
2.9 KiB
C
146 lines
2.9 KiB
C
// Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) All rights reserved.
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// SPDX-License-Identifier: Apache-2.0
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#include <openssl/asn1.h>
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#include <openssl/bio.h>
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#include <openssl/err.h>
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int a2i_ASN1_INTEGER(BIO *bp, ASN1_INTEGER *bs, char *buf, int size) {
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int i = 0, j = 0, k = 0, n = 0, again = 0, bufsize = 0;
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unsigned char *s = NULL, *sp = NULL;
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char *bufp = NULL;
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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;
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}
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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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}
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if (i == 0) {
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goto err;
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}
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if (buf[i - 1] == '\r') {
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buf[--i] = '\0';
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}
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if (i == 0) {
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goto err;
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}
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again = (buf[i - 1] == '\\');
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for (j = 0; j < i; j++) {
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if (!OPENSSL_isxdigit(buf[j])) {
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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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if (i < 2) {
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goto err;
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}
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bufp = buf;
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if (first) {
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first = 0;
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if ((bufp[0] == '0') && (bufp[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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if (i % 2 != 0) {
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OPENSSL_PUT_ERROR(ASN1, ASN1_R_ODD_NUMBER_OF_CHARS);
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OPENSSL_free(s);
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return 0;
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}
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i /= 2;
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if (num + i > slen) {
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sp = OPENSSL_realloc(s, num + i);
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if (sp == NULL) {
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OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
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OPENSSL_free(s);
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return 0;
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}
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s = sp;
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slen = num + i;
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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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uint8_t hex = 0;
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if (!OPENSSL_fromxdigit(&hex, bufp[k + n])) {
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OPENSSL_PUT_ERROR(ASN1, 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] |= hex;
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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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}
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bs->length = num;
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bs->data = s;
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return 1;
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err:
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OPENSSL_PUT_ERROR(ASN1, ASN1_R_SHORT_LINE);
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OPENSSL_free(s);
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return 0;
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}
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int i2a_ASN1_INTEGER(BIO *bp, const ASN1_INTEGER *a) {
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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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}
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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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}
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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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}
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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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}
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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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}
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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 i2a_ASN1_ENUMERATED(BIO *bp, const ASN1_ENUMERATED *a) {
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return i2a_ASN1_INTEGER(bp, a);
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}
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