Mercurial > vim
annotate src/crypt_zip.c @ 15521:6d949e552e99 v8.1.0768
patch 8.1.0768: updating completions may cause the popup menu to flicker
commit https://github.com/vim/vim/commit/ae654385dfb2ae4c1d70789d1dce3676dba4dfbc
Author: Bram Moolenaar <Bram@vim.org>
Date: Thu Jan 17 21:09:05 2019 +0100
patch 8.1.0768: updating completions may cause the popup menu to flicker
Problem: Updating completions may cause the popup menu to flicker.
Solution: Avoid updating the text below the popup menu before drawing the
popup menu.
| author | Bram Moolenaar <Bram@vim.org> |
|---|---|
| date | Thu, 17 Jan 2019 21:15:06 +0100 |
| parents | 27b9a84395b5 |
| children | 2dcaa860e3fc |
| 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 | 2 * |
| 3 * VIM - Vi IMproved by Bram Moolenaar | |
| 4 * | |
| 5 * Do ":help uganda" in Vim to read copying and usage conditions. | |
| 6 * Do ":help credits" in Vim to see a list of people who contributed. | |
| 7 * See README.txt for an overview of the Vim source code. | |
| 8 */ | |
| 9 | |
| 10 /* | |
| 11 * crypt_zip.c: Zip encryption support. | |
| 12 */ | |
| 13 #include "vim.h" | |
| 14 | |
| 15 #if defined(FEAT_CRYPT) || defined(PROTO) | |
| 16 /* | |
| 17 * Optional encryption support. | |
| 18 * Mohsin Ahmed, mosh@sasi.com, 98-09-24 | |
| 19 * Based on zip/crypt sources. | |
| 20 * | |
| 21 * NOTE FOR USA: Since 2000 exporting this code from the USA is allowed to | |
| 22 * most countries. There are a few exceptions, but that still should not be a | |
| 23 * problem since this code was originally created in Europe and India. | |
| 24 */ | |
| 25 | |
| 26 /* Need a type that should be 32 bits. 64 also works but wastes space. */ | |
| 27 # if VIM_SIZEOF_INT >= 4 | |
| 28 typedef unsigned int u32_T; /* int is at least 32 bits */ | |
| 29 # else | |
| 30 typedef unsigned long u32_T; /* long should be 32 bits or more */ | |
| 31 # endif | |
| 32 | |
| 33 /* The state of encryption, referenced by cryptstate_T. */ | |
| 34 typedef struct { | |
| 35 u32_T keys[3]; | |
| 36 } zip_state_T; | |
| 37 | |
| 38 | |
| 39 static u32_T crc_32_table[256]; | |
| 40 | |
| 41 /* | |
| 42 * Fill the CRC table, if not done already. | |
| 43 */ | |
| 44 static void | |
|
7817
83861277e6a3
commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents:
7799
diff
changeset
|
45 make_crc_tab(void) |
| 6122 | 46 { |
| 47 u32_T s, t, v; | |
| 48 static int done = FALSE; | |
| 49 | |
| 50 if (done) | |
| 51 return; | |
| 52 for (t = 0; t < 256; t++) | |
| 53 { | |
| 54 v = t; | |
| 55 for (s = 0; s < 8; s++) | |
| 56 v = (v >> 1) ^ ((v & 1) * (u32_T)0xedb88320L); | |
| 57 crc_32_table[t] = v; | |
| 58 } | |
| 59 done = TRUE; | |
| 60 } | |
| 61 | |
| 62 #define CRC32(c, b) (crc_32_table[((int)(c) ^ (b)) & 0xff] ^ ((c) >> 8)) | |
| 63 | |
| 64 /* | |
| 65 * Return the next byte in the pseudo-random sequence. | |
| 66 */ | |
| 67 #define DECRYPT_BYTE_ZIP(keys, t) { \ | |
| 68 short_u temp = (short_u)keys[2] | 2; \ | |
| 69 t = (int)(((unsigned)(temp * (temp ^ 1U)) >> 8) & 0xff); \ | |
| 70 } | |
| 71 | |
| 72 /* | |
| 73 * Update the encryption keys with the next byte of plain text. | |
| 74 */ | |
| 75 #define UPDATE_KEYS_ZIP(keys, c) { \ | |
| 76 keys[0] = CRC32(keys[0], (c)); \ | |
| 77 keys[1] += keys[0] & 0xff; \ | |
| 78 keys[1] = keys[1] * 134775813L + 1; \ | |
| 79 keys[2] = CRC32(keys[2], (int)(keys[1] >> 24)); \ | |
| 80 } | |
| 81 | |
| 82 /* | |
| 83 * Initialize for encryption/decryption. | |
| 84 */ | |
| 85 void | |
|
7817
83861277e6a3
commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents:
7799
diff
changeset
|
86 crypt_zip_init( |
|
83861277e6a3
commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents:
7799
diff
changeset
|
87 cryptstate_T *state, |
|
83861277e6a3
commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents:
7799
diff
changeset
|
88 char_u *key, |
|
83861277e6a3
commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents:
7799
diff
changeset
|
89 char_u *salt UNUSED, |
|
83861277e6a3
commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents:
7799
diff
changeset
|
90 int salt_len UNUSED, |
|
83861277e6a3
commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents:
7799
diff
changeset
|
91 char_u *seed UNUSED, |
|
83861277e6a3
commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents:
7799
diff
changeset
|
92 int seed_len UNUSED) |
| 6122 | 93 { |
| 94 char_u *p; | |
| 95 zip_state_T *zs; | |
| 96 | |
| 97 zs = (zip_state_T *)alloc(sizeof(zip_state_T)); | |
| 98 state->method_state = zs; | |
| 99 | |
| 100 make_crc_tab(); | |
| 101 zs->keys[0] = 305419896L; | |
| 102 zs->keys[1] = 591751049L; | |
| 103 zs->keys[2] = 878082192L; | |
| 104 for (p = key; *p != NUL; ++p) | |
| 105 { | |
| 106 UPDATE_KEYS_ZIP(zs->keys, (int)*p); | |
| 107 } | |
| 108 } | |
| 109 | |
| 110 /* | |
| 111 * Encrypt "from[len]" into "to[len]". | |
| 112 * "from" and "to" can be equal to encrypt in place. | |
| 113 */ | |
| 114 void | |
|
7817
83861277e6a3
commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents:
7799
diff
changeset
|
115 crypt_zip_encode( |
|
83861277e6a3
commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents:
7799
diff
changeset
|
116 cryptstate_T *state, |
|
83861277e6a3
commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents:
7799
diff
changeset
|
117 char_u *from, |
|
83861277e6a3
commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents:
7799
diff
changeset
|
118 size_t len, |
|
83861277e6a3
commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents:
7799
diff
changeset
|
119 char_u *to) |
| 6122 | 120 { |
| 121 zip_state_T *zs = state->method_state; | |
| 122 size_t i; | |
| 123 int ztemp, t; | |
| 124 | |
| 125 for (i = 0; i < len; ++i) | |
| 126 { | |
| 127 ztemp = from[i]; | |
| 128 DECRYPT_BYTE_ZIP(zs->keys, t); | |
| 129 UPDATE_KEYS_ZIP(zs->keys, ztemp); | |
| 130 to[i] = t ^ ztemp; | |
| 131 } | |
| 132 } | |
| 133 | |
| 134 /* | |
| 135 * Decrypt "from[len]" into "to[len]". | |
| 136 */ | |
| 137 void | |
|
7817
83861277e6a3
commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents:
7799
diff
changeset
|
138 crypt_zip_decode( |
|
83861277e6a3
commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents:
7799
diff
changeset
|
139 cryptstate_T *state, |
|
83861277e6a3
commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents:
7799
diff
changeset
|
140 char_u *from, |
|
83861277e6a3
commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents:
7799
diff
changeset
|
141 size_t len, |
|
83861277e6a3
commit https://github.com/vim/vim/commit/7454a06e2642d2b37afad1c5e71cec68081ca4ff
Christian Brabandt <cb@256bit.org>
parents:
7799
diff
changeset
|
142 char_u *to) |
| 6122 | 143 { |
| 144 zip_state_T *zs = state->method_state; | |
| 145 size_t i; | |
| 146 short_u temp; | |
| 147 | |
| 148 for (i = 0; i < len; ++i) | |
| 149 { | |
| 150 temp = (short_u)zs->keys[2] | 2; | |
| 151 temp = (int)(((unsigned)(temp * (temp ^ 1U)) >> 8) & 0xff); | |
| 152 UPDATE_KEYS_ZIP(zs->keys, to[i] = from[i] ^ temp); | |
| 153 } | |
| 154 } | |
| 155 | |
| 156 #endif /* FEAT_CRYPT */ |