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Commit | Line | Data |
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2039c421 | 1 | /* |
605856d7 | 2 | * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved. |
d02b48c6 | 3 | * |
365a2d99 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
2039c421 RS |
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 | |
d02b48c6 RE |
8 | */ |
9 | ||
10 | #include <stdio.h> | |
25f2138b | 11 | #include "crypto/ctype.h" |
b39fc560 | 12 | #include "internal/cryptlib.h" |
ec577822 | 13 | #include <openssl/buffer.h> |
f66c3032 | 14 | #include <openssl/asn1.h> |
d02b48c6 | 15 | |
095d2f0f | 16 | int i2a_ASN1_STRING(BIO *bp, const ASN1_STRING *a, int type) |
0f113f3e MC |
17 | { |
18 | int i, n = 0; | |
19 | static const char *h = "0123456789ABCDEF"; | |
20 | char buf[2]; | |
d02b48c6 | 21 | |
0f113f3e | 22 | if (a == NULL) |
26a7d938 | 23 | return 0; |
d02b48c6 | 24 | |
0f113f3e MC |
25 | if (a->length == 0) { |
26 | if (BIO_write(bp, "0", 1) != 1) | |
27 | goto err; | |
28 | n = 1; | |
29 | } else { | |
30 | for (i = 0; i < a->length; i++) { | |
31 | if ((i != 0) && (i % 35 == 0)) { | |
32 | if (BIO_write(bp, "\\\n", 2) != 2) | |
33 | goto err; | |
34 | n += 2; | |
35 | } | |
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) | |
39 | goto err; | |
40 | n += 2; | |
41 | } | |
42 | } | |
26a7d938 | 43 | return n; |
0f113f3e | 44 | err: |
26a7d938 | 45 | return -1; |
0f113f3e | 46 | } |
d02b48c6 | 47 | |
6b691a5c | 48 | int a2i_ASN1_STRING(BIO *bp, ASN1_STRING *bs, char *buf, int size) |
0f113f3e | 49 | { |
a1df06b3 | 50 | int i, j, k, m, n, again, bufsize; |
0f113f3e MC |
51 | unsigned char *s = NULL, *sp; |
52 | unsigned char *bufp; | |
53 | int num = 0, slen = 0, first = 1; | |
d02b48c6 | 54 | |
0f113f3e MC |
55 | bufsize = BIO_gets(bp, buf, size); |
56 | for (;;) { | |
57 | if (bufsize < 1) { | |
58 | if (first) | |
59 | break; | |
60 | else | |
66696478 | 61 | goto err; |
0f113f3e MC |
62 | } |
63 | first = 0; | |
d02b48c6 | 64 | |
0f113f3e MC |
65 | i = bufsize; |
66 | if (buf[i - 1] == '\n') | |
67 | buf[--i] = '\0'; | |
68 | if (i == 0) | |
66696478 | 69 | goto err; |
0f113f3e MC |
70 | if (buf[i - 1] == '\r') |
71 | buf[--i] = '\0'; | |
72 | if (i == 0) | |
66696478 | 73 | goto err; |
0f113f3e | 74 | again = (buf[i - 1] == '\\'); |
d02b48c6 | 75 | |
0f113f3e | 76 | for (j = i - 1; j > 0; j--) { |
a1df06b3 | 77 | if (!ossl_isxdigit(buf[j])) { |
0f113f3e MC |
78 | i = j; |
79 | break; | |
80 | } | |
81 | } | |
82 | buf[i] = '\0'; | |
83 | /* | |
84 | * We have now cleared all the crap off the end of the line | |
85 | */ | |
86 | if (i < 2) | |
66696478 | 87 | goto err; |
d02b48c6 | 88 | |
0f113f3e | 89 | bufp = (unsigned char *)buf; |
d02b48c6 | 90 | |
0f113f3e MC |
91 | k = 0; |
92 | i -= again; | |
93 | if (i % 2 != 0) { | |
9311d0c4 | 94 | ERR_raise(ERR_LIB_ASN1, ASN1_R_ODD_NUMBER_OF_CHARS); |
036e61b1 | 95 | OPENSSL_free(s); |
66696478 | 96 | return 0; |
0f113f3e MC |
97 | } |
98 | i /= 2; | |
99 | if (num + i > slen) { | |
2d29e2df | 100 | sp = OPENSSL_realloc(s, (unsigned int)num + i * 2); |
0f113f3e | 101 | if (sp == NULL) { |
b548a1f1 | 102 | OPENSSL_free(s); |
66696478 | 103 | return 0; |
0f113f3e MC |
104 | } |
105 | s = sp; | |
106 | slen = num + i * 2; | |
107 | } | |
108 | for (j = 0; j < i; j++, k += 2) { | |
109 | for (n = 0; n < 2; n++) { | |
49445f21 RS |
110 | m = OPENSSL_hexchar2int(bufp[k + n]); |
111 | if (m < 0) { | |
9311d0c4 | 112 | ERR_raise(ERR_LIB_ASN1, ASN1_R_NON_HEX_CHARACTERS); |
036e61b1 | 113 | OPENSSL_free(s); |
66696478 | 114 | return 0; |
0f113f3e MC |
115 | } |
116 | s[num + j] <<= 4; | |
117 | s[num + j] |= m; | |
118 | } | |
119 | } | |
120 | num += i; | |
121 | if (again) | |
122 | bufsize = BIO_gets(bp, buf, size); | |
123 | else | |
124 | break; | |
125 | } | |
126 | bs->length = num; | |
127 | bs->data = s; | |
66696478 RS |
128 | return 1; |
129 | ||
0f113f3e | 130 | err: |
9311d0c4 | 131 | ERR_raise(ERR_LIB_ASN1, ASN1_R_SHORT_LINE); |
036e61b1 | 132 | OPENSSL_free(s); |
66696478 | 133 | return 0; |
0f113f3e | 134 | } |