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1 | 1 | /* |
2 | | - * Copyright (c) 2018 Thomas Pornin <pornin@bolet.org> |
3 | | - * |
4 | | - * Permission is hereby granted, free of charge, to any person obtaining |
5 | | - * a copy of this software and associated documentation files (the |
6 | | - * "Software"), to deal in the Software without restriction, including |
7 | | - * without limitation the rights to use, copy, modify, merge, publish, |
8 | | - * distribute, sublicense, and/or sell copies of the Software, and to |
9 | | - * permit persons to whom the Software is furnished to do so, subject to |
10 | | - * the following conditions: |
11 | | - * |
12 | | - * The above copyright notice and this permission notice shall be |
13 | | - * included in all copies or substantial portions of the Software. |
14 | | - * |
15 | | - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
16 | | - * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
17 | | - * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
18 | | - * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
19 | | - * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
20 | | - * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
21 | | - * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
22 | | - * SOFTWARE. |
23 | | - */ |
| 2 | + Copyright (c) 2018 Thomas Pornin <pornin@bolet.org> |
| 3 | +
|
| 4 | + Permission is hereby granted, free of charge, to any person obtaining |
| 5 | + a copy of this software and associated documentation files (the |
| 6 | + "Software"), to deal in the Software without restriction, including |
| 7 | + without limitation the rights to use, copy, modify, merge, publish, |
| 8 | + distribute, sublicense, and/or sell copies of the Software, and to |
| 9 | + permit persons to whom the Software is furnished to do so, subject to |
| 10 | + the following conditions: |
| 11 | +
|
| 12 | + The above copyright notice and this permission notice shall be |
| 13 | + included in all copies or substantial portions of the Software. |
| 14 | +
|
| 15 | + THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 16 | + EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 17 | + MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 18 | + NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 19 | + BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 20 | + ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 21 | + CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 22 | + SOFTWARE. |
| 23 | +*/ |
24 | 24 |
|
25 | 25 | #include "inner.h" |
26 | 26 |
|
27 | 27 | /* see inner.h */ |
28 | 28 | br_asn1_uint |
29 | 29 | br_asn1_uint_prepare(const void *xdata, size_t xlen) |
30 | 30 | { |
31 | | - const unsigned char *x; |
32 | | - br_asn1_uint t; |
33 | | - |
34 | | - x = xdata; |
35 | | - while (xlen > 0 && *x == 0) { |
36 | | - x ++; |
37 | | - xlen --; |
38 | | - } |
39 | | - t.data = x; |
40 | | - t.len = xlen; |
41 | | - t.asn1len = xlen; |
42 | | - if (xlen == 0 || x[0] >= 0x80) { |
43 | | - t.asn1len ++; |
44 | | - } |
45 | | - return t; |
| 31 | + const unsigned char *x; |
| 32 | + br_asn1_uint t; |
| 33 | + |
| 34 | + x = xdata; |
| 35 | + |
| 36 | + while (xlen > 0 && *x == 0) |
| 37 | + { |
| 38 | + x ++; |
| 39 | + xlen --; |
| 40 | + } |
| 41 | + |
| 42 | + t.data = x; |
| 43 | + t.len = xlen; |
| 44 | + t.asn1len = xlen; |
| 45 | + |
| 46 | + if (xlen == 0 || x[0] >= 0x80) |
| 47 | + { |
| 48 | + t.asn1len ++; |
| 49 | + } |
| 50 | + |
| 51 | + return t; |
46 | 52 | } |
47 | 53 |
|
48 | 54 | /* see inner.h */ |
49 | 55 | size_t |
50 | 56 | br_asn1_encode_length(void *dest, size_t len) |
51 | 57 | { |
52 | | - unsigned char *buf; |
53 | | - size_t z; |
54 | | - int i, j; |
55 | | - |
56 | | - buf = dest; |
57 | | - if (len < 0x80) { |
58 | | - if (buf != NULL) { |
59 | | - *buf = len; |
60 | | - } |
61 | | - return 1; |
62 | | - } |
63 | | - i = 0; |
64 | | - for (z = len; z != 0; z >>= 8) { |
65 | | - i ++; |
66 | | - } |
67 | | - if (buf != NULL) { |
68 | | - *buf ++ = 0x80 + i; |
69 | | - for (j = i - 1; j >= 0; j --) { |
70 | | - *buf ++ = len >> (j << 3); |
71 | | - } |
72 | | - } |
73 | | - return i + 1; |
| 58 | + unsigned char *buf; |
| 59 | + size_t z; |
| 60 | + int i, j; |
| 61 | + |
| 62 | + buf = dest; |
| 63 | + |
| 64 | + if (len < 0x80) |
| 65 | + { |
| 66 | + if (buf != NULL) |
| 67 | + { |
| 68 | + *buf = len; |
| 69 | + } |
| 70 | + |
| 71 | + return 1; |
| 72 | + } |
| 73 | + |
| 74 | + i = 0; |
| 75 | + |
| 76 | + for (z = len; z != 0; z >>= 8) |
| 77 | + { |
| 78 | + i ++; |
| 79 | + } |
| 80 | + |
| 81 | + if (buf != NULL) |
| 82 | + { |
| 83 | + *buf ++ = 0x80 + i; |
| 84 | + |
| 85 | + for (j = i - 1; j >= 0; j --) |
| 86 | + { |
| 87 | + *buf ++ = len >> (j << 3); |
| 88 | + } |
| 89 | + } |
| 90 | + |
| 91 | + return i + 1; |
74 | 92 | } |
75 | 93 |
|
76 | 94 | /* see inner.h */ |
77 | 95 | size_t |
78 | 96 | br_asn1_encode_uint(void *dest, br_asn1_uint pp) |
79 | 97 | { |
80 | | - unsigned char *buf; |
81 | | - size_t lenlen; |
82 | | - |
83 | | - if (dest == NULL) { |
84 | | - return 1 + br_asn1_encode_length(NULL, pp.asn1len) + pp.asn1len; |
85 | | - } |
86 | | - buf = dest; |
87 | | - *buf ++ = 0x02; |
88 | | - lenlen = br_asn1_encode_length(buf, pp.asn1len); |
89 | | - buf += lenlen; |
90 | | - *buf = 0x00; |
91 | | - memcpy(buf + pp.asn1len - pp.len, pp.data, pp.len); |
92 | | - return 1 + lenlen + pp.asn1len; |
| 98 | + unsigned char *buf; |
| 99 | + size_t lenlen; |
| 100 | + |
| 101 | + if (dest == NULL) |
| 102 | + { |
| 103 | + return 1 + br_asn1_encode_length(NULL, pp.asn1len) + pp.asn1len; |
| 104 | + } |
| 105 | + |
| 106 | + buf = dest; |
| 107 | + *buf ++ = 0x02; |
| 108 | + lenlen = br_asn1_encode_length(buf, pp.asn1len); |
| 109 | + buf += lenlen; |
| 110 | + *buf = 0x00; |
| 111 | + memcpy(buf + pp.asn1len - pp.len, pp.data, pp.len); |
| 112 | + return 1 + lenlen + pp.asn1len; |
93 | 113 | } |
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