annotate src/crypt_zip.c @ 30436:93abb8acf842

Added tag v9.0.0553 for changeset c2ef8f0f8ba1a3242753085b661fa3f76e0b03b0
author Bram Moolenaar <Bram@vim.org>
date Thu, 22 Sep 2022 23:15:04 +0200
parents 7e9e53a0368f
children 50555279168b
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
10042
4aead6a9b7a9 commit https://github.com/vim/vim/commit/edf3f97ae2af024708ebb4ac614227327033ca47
Christian Brabandt <cb@256bit.org>
parents: 7817
diff changeset
1 /* vi:set ts=8 sts=4 sw=4 noet:
6122
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
2 *
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
3 * VIM - Vi IMproved by Bram Moolenaar
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
4 *
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
5 * Do ":help uganda" in Vim to read copying and usage conditions.
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
6 * Do ":help credits" in Vim to see a list of people who contributed.
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
7 * See README.txt for an overview of the Vim source code.
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
8 */
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
9
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
10 /*
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
11 * crypt_zip.c: Zip encryption support.
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
12 */
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
13 #include "vim.h"
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
14
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
15 #if defined(FEAT_CRYPT) || defined(PROTO)
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
16 /*
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
17 * Optional encryption support.
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
18 * Mohsin Ahmed, mosh@sasi.com, 98-09-24
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
19 * Based on zip/crypt sources.
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
20 *
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
21 * NOTE FOR USA: Since 2000 exporting this code from the USA is allowed to
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
22 * most countries. There are a few exceptions, but that still should not be a
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
23 * problem since this code was originally created in Europe and India.
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
24 */
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
25
18757
c469e1930456 patch 8.1.2368: using old C style comments
Bram Moolenaar <Bram@vim.org>
parents: 16825
diff changeset
26 // Need a type that should be 32 bits. 64 also works but wastes space.
c469e1930456 patch 8.1.2368: using old C style comments
Bram Moolenaar <Bram@vim.org>
parents: 16825
diff changeset
27 typedef unsigned int u32_T; // int is at least 32 bits
6122
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
28
18757
c469e1930456 patch 8.1.2368: using old C style comments
Bram Moolenaar <Bram@vim.org>
parents: 16825
diff changeset
29 // The state of encryption, referenced by cryptstate_T.
6122
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
30 typedef struct {
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
31 u32_T keys[3];
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
32 } zip_state_T;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
33
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
34
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
35 static u32_T crc_32_table[256];
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
36
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
37 /*
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
38 * Fill the CRC table, if not done already.
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
39 */
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
40 static void
7817
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 7799
diff changeset
41 make_crc_tab(void)
6122
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
42 {
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
43 u32_T s, t, v;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
44 static int done = FALSE;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
45
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
46 if (done)
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
47 return;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
48 for (t = 0; t < 256; t++)
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
49 {
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
50 v = t;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
51 for (s = 0; s < 8; s++)
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
52 v = (v >> 1) ^ ((v & 1) * (u32_T)0xedb88320L);
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
53 crc_32_table[t] = v;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
54 }
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
55 done = TRUE;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
56 }
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
57
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
58 #define CRC32(c, b) (crc_32_table[((int)(c) ^ (b)) & 0xff] ^ ((c) >> 8))
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
59
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
60 /*
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
61 * Return the next byte in the pseudo-random sequence.
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
62 */
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
63 #define DECRYPT_BYTE_ZIP(keys, t) { \
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
64 short_u temp = (short_u)keys[2] | 2; \
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
65 t = (int)(((unsigned)(temp * (temp ^ 1U)) >> 8) & 0xff); \
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
66 }
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
67
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
68 /*
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
69 * Update the encryption keys with the next byte of plain text.
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
70 */
16162
cd5c83115ec6 patch 8.1.1086: too many curly braces
Bram Moolenaar <Bram@vim.org>
parents: 15607
diff changeset
71 #define UPDATE_KEYS_ZIP(keys, c) do { \
6122
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
72 keys[0] = CRC32(keys[0], (c)); \
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
73 keys[1] += keys[0] & 0xff; \
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
74 keys[1] = keys[1] * 134775813L + 1; \
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
75 keys[2] = CRC32(keys[2], (int)(keys[1] >> 24)); \
16162
cd5c83115ec6 patch 8.1.1086: too many curly braces
Bram Moolenaar <Bram@vim.org>
parents: 15607
diff changeset
76 } while (0)
6122
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
77
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
78 /*
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
79 * Initialize for encryption/decryption.
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
80 */
16429
a1229400434a patch 8.1.1219: not checking for NULL return from alloc()
Bram Moolenaar <Bram@vim.org>
parents: 16162
diff changeset
81 int
7817
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 7799
diff changeset
82 crypt_zip_init(
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 7799
diff changeset
83 cryptstate_T *state,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 7799
diff changeset
84 char_u *key,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 7799
diff changeset
85 char_u *salt UNUSED,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 7799
diff changeset
86 int salt_len UNUSED,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 7799
diff changeset
87 char_u *seed UNUSED,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 7799
diff changeset
88 int seed_len UNUSED)
6122
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
89 {
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
90 char_u *p;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
91 zip_state_T *zs;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
92
16825
ce04ebdf26b8 patch 8.1.1414: alloc() returning "char_u *" causes a lot of type casts
Bram Moolenaar <Bram@vim.org>
parents: 16429
diff changeset
93 zs = ALLOC_ONE(zip_state_T);
16429
a1229400434a patch 8.1.1219: not checking for NULL return from alloc()
Bram Moolenaar <Bram@vim.org>
parents: 16162
diff changeset
94 if (zs == NULL)
a1229400434a patch 8.1.1219: not checking for NULL return from alloc()
Bram Moolenaar <Bram@vim.org>
parents: 16162
diff changeset
95 return FAIL;
6122
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
96 state->method_state = zs;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
97
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
98 make_crc_tab();
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
99 zs->keys[0] = 305419896L;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
100 zs->keys[1] = 591751049L;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
101 zs->keys[2] = 878082192L;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
102 for (p = key; *p != NUL; ++p)
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
103 UPDATE_KEYS_ZIP(zs->keys, (int)*p);
16429
a1229400434a patch 8.1.1219: not checking for NULL return from alloc()
Bram Moolenaar <Bram@vim.org>
parents: 16162
diff changeset
104
a1229400434a patch 8.1.1219: not checking for NULL return from alloc()
Bram Moolenaar <Bram@vim.org>
parents: 16162
diff changeset
105 return OK;
6122
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
106 }
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
107
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
108 /*
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
109 * Encrypt "from[len]" into "to[len]".
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
110 * "from" and "to" can be equal to encrypt in place.
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
111 */
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
112 void
7817
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 7799
diff changeset
113 crypt_zip_encode(
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 7799
diff changeset
114 cryptstate_T *state,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 7799
diff changeset
115 char_u *from,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 7799
diff changeset
116 size_t len,
24970
7e9e53a0368f patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents: 18757
diff changeset
117 char_u *to,
7e9e53a0368f patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents: 18757
diff changeset
118 int last UNUSED)
6122
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
119 {
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
120 zip_state_T *zs = state->method_state;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
121 size_t i;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
122 int ztemp, t;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
123
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
124 for (i = 0; i < len; ++i)
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
125 {
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
126 ztemp = from[i];
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
127 DECRYPT_BYTE_ZIP(zs->keys, t);
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
128 UPDATE_KEYS_ZIP(zs->keys, ztemp);
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
129 to[i] = t ^ ztemp;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
130 }
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
131 }
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
132
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
133 /*
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
134 * Decrypt "from[len]" into "to[len]".
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
135 */
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
136 void
7817
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 7799
diff changeset
137 crypt_zip_decode(
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 7799
diff changeset
138 cryptstate_T *state,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 7799
diff changeset
139 char_u *from,
83861277e6a3 commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents: 7799
diff changeset
140 size_t len,
24970
7e9e53a0368f patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents: 18757
diff changeset
141 char_u *to,
7e9e53a0368f patch 8.2.3022: available encryption methods are not strong enough
Bram Moolenaar <Bram@vim.org>
parents: 18757
diff changeset
142 int last UNUSED)
6122
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
143 {
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
144 zip_state_T *zs = state->method_state;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
145 size_t i;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
146 short_u temp;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
147
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
148 for (i = 0; i < len; ++i)
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
149 {
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
150 temp = (short_u)zs->keys[2] | 2;
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
151 temp = (int)(((unsigned)(temp * (temp ^ 1U)) >> 8) & 0xff);
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
152 UPDATE_KEYS_ZIP(zs->keys, to[i] = from[i] ^ temp);
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
153 }
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
154 }
18ac55444b37 updated for version 7.4.399
Bram Moolenaar <bram@vim.org>
parents:
diff changeset
155
18757
c469e1930456 patch 8.1.2368: using old C style comments
Bram Moolenaar <Bram@vim.org>
parents: 16825
diff changeset
156 #endif // FEAT_CRYPT