2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
12 #include "internal/cryptlib.h"
13 #include <openssl/buffer.h>
14 #include <openssl/asn1.h>
16 int i2a_ASN1_STRING(BIO *bp, const ASN1_STRING *a, int type)
19 static const char *h = "0123456789ABCDEF";
26 if (BIO_write(bp, "0", 1) != 1)
30 for (i = 0; i < a->length; i++) {
31 if ((i != 0) && (i % 35 == 0)) {
32 if (BIO_write(bp, "\\\n", 2) != 2)
36 buf[0] = h[((unsigned char)a->data[i] >> 4) & 0x0f];
37 buf[1] = h[((unsigned char)a->data[i]) & 0x0f];
38 if (BIO_write(bp, buf, 2) != 2)
48 int a2i_ASN1_STRING(BIO *bp, ASN1_STRING *bs, char *buf, int size)
50 int i, j, k, m, n, again, bufsize, spec_char;
51 unsigned char *s = NULL, *sp;
53 int num = 0, slen = 0, first = 1;
55 bufsize = BIO_gets(bp, buf, size);
66 if (buf[i - 1] == '\n')
70 if (buf[i - 1] == '\r')
74 again = (buf[i - 1] == '\\');
76 for (j = i - 1; j > 0; j--) {
77 #ifndef CHARSET_EBCDIC
78 spec_char = (!(((buf[j] >= '0') && (buf[j] <= '9')) ||
79 ((buf[j] >= 'a') && (buf[j] <= 'f')) ||
80 ((buf[j] >= 'A') && (buf[j] <= 'F'))));
83 * This #ifdef is not strictly necessary, since the characters
84 * A...F a...f 0...9 are contiguous (yes, even in EBCDIC - but
85 * not the whole alphabet). Nevertheless, isxdigit() is faster.
87 spec_char = (!isxdigit(buf[j]));
96 * We have now cleared all the crap off the end of the line
101 bufp = (unsigned char *)buf;
106 ASN1err(ASN1_F_A2I_ASN1_STRING, ASN1_R_ODD_NUMBER_OF_CHARS);
111 if (num + i > slen) {
112 sp = OPENSSL_realloc(s, (unsigned int)num + i * 2);
114 ASN1err(ASN1_F_A2I_ASN1_STRING, ERR_R_MALLOC_FAILURE);
121 for (j = 0; j < i; j++, k += 2) {
122 for (n = 0; n < 2; n++) {
123 m = OPENSSL_hexchar2int(bufp[k + n]);
125 ASN1err(ASN1_F_A2I_ASN1_STRING,
126 ASN1_R_NON_HEX_CHARACTERS);
136 bufsize = BIO_gets(bp, buf, size);
145 ASN1err(ASN1_F_A2I_ASN1_STRING, ASN1_R_SHORT_LINE);