]>
Commit | Line | Data |
---|---|---|
b1322259 RS |
1 | /* |
2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. | |
d02b48c6 | 3 | * |
b1322259 RS |
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 | |
d02b48c6 RE |
8 | */ |
9 | ||
10 | #include <stdio.h> | |
5fd1478d | 11 | #include <ctype.h> |
b39fc560 | 12 | #include "internal/cryptlib.h" |
ec577822 | 13 | #include <openssl/buffer.h> |
f66c3032 | 14 | #include <openssl/asn1.h> |
d02b48c6 | 15 | |
604f6eff | 16 | int i2a_ASN1_INTEGER(BIO *bp, const ASN1_INTEGER *a) |
0f113f3e MC |
17 | { |
18 | int i, n = 0; | |
19 | static const char *h = "0123456789ABCDEF"; | |
20 | char buf[2]; | |
d02b48c6 | 21 | |
0f113f3e MC |
22 | if (a == NULL) |
23 | return (0); | |
d02b48c6 | 24 | |
0f113f3e MC |
25 | if (a->type & V_ASN1_NEG) { |
26 | if (BIO_write(bp, "-", 1) != 1) | |
27 | goto err; | |
28 | n = 1; | |
29 | } | |
8e8972bb | 30 | |
0f113f3e MC |
31 | if (a->length == 0) { |
32 | if (BIO_write(bp, "00", 2) != 2) | |
33 | goto err; | |
34 | n += 2; | |
35 | } else { | |
36 | for (i = 0; i < a->length; i++) { | |
37 | if ((i != 0) && (i % 35 == 0)) { | |
38 | if (BIO_write(bp, "\\\n", 2) != 2) | |
39 | goto err; | |
40 | n += 2; | |
41 | } | |
42 | buf[0] = h[((unsigned char)a->data[i] >> 4) & 0x0f]; | |
43 | buf[1] = h[((unsigned char)a->data[i]) & 0x0f]; | |
44 | if (BIO_write(bp, buf, 2) != 2) | |
45 | goto err; | |
46 | n += 2; | |
47 | } | |
48 | } | |
49 | return (n); | |
50 | err: | |
51 | return (-1); | |
52 | } | |
d02b48c6 | 53 | |
6b691a5c | 54 | int a2i_ASN1_INTEGER(BIO *bp, ASN1_INTEGER *bs, char *buf, int size) |
0f113f3e | 55 | { |
0f113f3e MC |
56 | int i, j, k, m, n, again, bufsize; |
57 | unsigned char *s = NULL, *sp; | |
58 | unsigned char *bufp; | |
59 | int num = 0, slen = 0, first = 1; | |
d02b48c6 | 60 | |
0f113f3e | 61 | bs->type = V_ASN1_INTEGER; |
d02b48c6 | 62 | |
0f113f3e MC |
63 | bufsize = BIO_gets(bp, buf, size); |
64 | for (;;) { | |
65 | if (bufsize < 1) | |
66696478 | 66 | goto err; |
0f113f3e MC |
67 | i = bufsize; |
68 | if (buf[i - 1] == '\n') | |
69 | buf[--i] = '\0'; | |
70 | if (i == 0) | |
66696478 | 71 | goto err; |
0f113f3e MC |
72 | if (buf[i - 1] == '\r') |
73 | buf[--i] = '\0'; | |
74 | if (i == 0) | |
66696478 | 75 | goto err; |
0f113f3e | 76 | again = (buf[i - 1] == '\\'); |
d02b48c6 | 77 | |
0f113f3e | 78 | for (j = 0; j < i; j++) { |
a53955d8 | 79 | #ifndef CHARSET_EBCDIC |
0f113f3e MC |
80 | if (!(((buf[j] >= '0') && (buf[j] <= '9')) || |
81 | ((buf[j] >= 'a') && (buf[j] <= 'f')) || | |
82 | ((buf[j] >= 'A') && (buf[j] <= 'F')))) | |
a53955d8 | 83 | #else |
0f113f3e MC |
84 | /* |
85 | * This #ifdef is not strictly necessary, since the characters | |
86 | * A...F a...f 0...9 are contiguous (yes, even in EBCDIC - but | |
87 | * not the whole alphabet). Nevertheless, isxdigit() is faster. | |
88 | */ | |
89 | if (!isxdigit(buf[j])) | |
a53955d8 | 90 | #endif |
0f113f3e MC |
91 | { |
92 | i = j; | |
93 | break; | |
94 | } | |
95 | } | |
96 | buf[i] = '\0'; | |
97 | /* | |
98 | * We have now cleared all the crap off the end of the line | |
99 | */ | |
100 | if (i < 2) | |
66696478 | 101 | goto err; |
d02b48c6 | 102 | |
0f113f3e MC |
103 | bufp = (unsigned char *)buf; |
104 | if (first) { | |
105 | first = 0; | |
106 | if ((bufp[0] == '0') && (buf[1] == '0')) { | |
107 | bufp += 2; | |
108 | i -= 2; | |
109 | } | |
110 | } | |
111 | k = 0; | |
112 | i -= again; | |
113 | if (i % 2 != 0) { | |
114 | ASN1err(ASN1_F_A2I_ASN1_INTEGER, ASN1_R_ODD_NUMBER_OF_CHARS); | |
3dc87806 | 115 | OPENSSL_free(s); |
66696478 | 116 | return 0; |
0f113f3e MC |
117 | } |
118 | i /= 2; | |
119 | if (num + i > slen) { | |
c99de053 | 120 | sp = OPENSSL_clear_realloc(s, slen, num + i * 2); |
0f113f3e MC |
121 | if (sp == NULL) { |
122 | ASN1err(ASN1_F_A2I_ASN1_INTEGER, ERR_R_MALLOC_FAILURE); | |
b548a1f1 | 123 | OPENSSL_free(s); |
66696478 | 124 | return 0; |
0f113f3e MC |
125 | } |
126 | s = sp; | |
127 | slen = num + i * 2; | |
128 | } | |
129 | for (j = 0; j < i; j++, k += 2) { | |
130 | for (n = 0; n < 2; n++) { | |
49445f21 RS |
131 | m = OPENSSL_hexchar2int(bufp[k + n]); |
132 | if (m < 0) { | |
0f113f3e MC |
133 | ASN1err(ASN1_F_A2I_ASN1_INTEGER, |
134 | ASN1_R_NON_HEX_CHARACTERS); | |
135 | goto err; | |
136 | } | |
137 | s[num + j] <<= 4; | |
138 | s[num + j] |= m; | |
139 | } | |
140 | } | |
141 | num += i; | |
142 | if (again) | |
143 | bufsize = BIO_gets(bp, buf, size); | |
144 | else | |
145 | break; | |
146 | } | |
147 | bs->length = num; | |
148 | bs->data = s; | |
66696478 | 149 | return 1; |
0f113f3e | 150 | err: |
66696478 | 151 | ASN1err(ASN1_F_A2I_ASN1_INTEGER, ASN1_R_SHORT_LINE); |
b0cb22b0 | 152 | OPENSSL_free(s); |
66696478 | 153 | return 0; |
0f113f3e | 154 | } |
6c5b6cb0 | 155 | |
095d2f0f | 156 | int i2a_ASN1_ENUMERATED(BIO *bp, const ASN1_ENUMERATED *a) |
6c5b6cb0 DSH |
157 | { |
158 | return i2a_ASN1_INTEGER(bp, a); | |
159 | } | |
160 | ||
161 | int a2i_ASN1_ENUMERATED(BIO *bp, ASN1_ENUMERATED *bs, char *buf, int size) | |
162 | { | |
163 | int rv = a2i_ASN1_INTEGER(bp, bs, buf, size); | |
164 | if (rv == 1) | |
165 | bs->type = V_ASN1_INTEGER | (bs->type & V_ASN1_NEG); | |
166 | return rv; | |
167 | } |