vim: src/crypt.c annotate

author	Christian Brabandt <cb@256bit.org>
date	Mon, 26 Jun 2023 09:54:34 +0200
parents	5d07e7e9580f
children	695b50472e85

rev	line source
32669 448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	1 /* vi:set ts=8 sts=4 sw=4 noet:
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	2 *
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	3 * VIM - Vi IMproved by Bram Moolenaar
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	4 *
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	5 * Do ":help uganda" in Vim to read copying and usage conditions.
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	6 * Do ":help credits" in Vim to see a list of people who contributed.
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	7 * See README.txt for an overview of the Vim source code.
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	8 */
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	9
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	10 /*
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	11 * crypt.c: Generic encryption support.
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	12 */
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	13 #include "vim.h"
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	14
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	15 #if defined(FEAT_CRYPT) \|\| defined(PROTO)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	16 /*
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	17 * Optional encryption support.
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	18 * Mohsin Ahmed, mosh@sasi.com, 1998-09-24
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	19 * Based on zip/crypt sources.
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	20 * Refactored by David Leadbeater, 2014.
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	21 *
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	22 * NOTE FOR USA: Since 2000 exporting this code from the USA is allowed to
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	23 * most countries. There are a few exceptions, but that still should not be a
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	24 * problem since this code was originally created in Europe and India.
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	25 *
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	26 * Blowfish addition originally made by Mohsin Ahmed,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	27 * http://www.cs.albany.edu/~mosh 2010-03-14
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	28 * Based on blowfish by Bruce Schneier (http://www.schneier.com/blowfish.html)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	29 * and sha256 by Christophe Devine.
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	30 */
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	31
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	32 typedef struct {
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	33 char *name; // encryption name as used in 'cryptmethod'
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	34 char *magic; // magic bytes stored in file header
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	35 int salt_len; // length of salt, or 0 when not using salt
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	36 int seed_len; // length of seed, or 0 when not using seed
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	37 int add_len; // additional length in the header needed for storing
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	38 // custom data
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	39 #ifdef CRYPT_NOT_INPLACE
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	40 int works_inplace; // encryption/decryption can be done in-place
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	41 #endif
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	42 int whole_undofile; // whole undo file is encrypted
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	43
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	44 // Optional function pointer for a self-test.
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	45 int (*self_test_fn)(void);
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	46
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	47 // Function pointer for initializing encryption/decryption.
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	48 int (* init_fn)(cryptstate_T state, char_u key, crypt_arg_T *arg);
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	49
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	50 // Function pointers for encoding/decoding from one buffer into another.
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	51 // Optional, however, these or the _buffer ones should be configured.
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	52 void (encode_fn)(cryptstate_T state, char_u *from, size_t len,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	53 char_u *to, int last);
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	54 void (decode_fn)(cryptstate_T state, char_u *from, size_t len,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	55 char_u *to, int last);
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	56
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	57 // Function pointers for encoding and decoding, can buffer data if needed.
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	58 // Optional (however, these or the above should be configured).
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	59 long (encode_buffer_fn)(cryptstate_T state, char_u *from, size_t len,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	60 char_u **newptr, int last);
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	61 long (decode_buffer_fn)(cryptstate_T state, char_u *from, size_t len,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	62 char_u **newptr, int last);
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	63
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	64 // Function pointers for in-place encoding and decoding, used for
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	65 // crypt_*_inplace(). "from" and "to" arguments will be equal.
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	66 // These may be the same as decode_fn and encode_fn above, however an
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	67 // algorithm may implement them in a way that is not interchangeable with
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	68 // the crypt_(en\|de)code() interface (for example because it wishes to add
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	69 // padding to files).
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	70 // This method is used for swap and undo files which have a rigid format.
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	71 void (encode_inplace_fn)(cryptstate_T state, char_u *p1, size_t len,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	72 char_u *p2, int last);
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	73 void (decode_inplace_fn)(cryptstate_T state, char_u *p1, size_t len,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	74 char_u *p2, int last);
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	75 } cryptmethod_T;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	76
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	77 static int crypt_sodium_init_(cryptstate_T state, char_u key, crypt_arg_T *arg);
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	78 static long crypt_sodium_buffer_decode(cryptstate_T state, char_u from, size_t len, char_u **buf_out, int last);
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	79 static long crypt_sodium_buffer_encode(cryptstate_T state, char_u from, size_t len, char_u **buf_out, int last);
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	80 #if defined(FEAT_EVAL) && defined(FEAT_SODIUM)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	81 static void crypt_sodium_report_hash_params(unsigned long long opslimit, unsigned long long ops_def, size_t memlimit, size_t mem_def, int alg, int alg_def);
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	82 #endif
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	83
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	84 // index is method_nr of cryptstate_T, CRYPT_M_*
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	85 static cryptmethod_T cryptmethods[CRYPT_M_COUNT] = {
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	86 // PK_Zip; very weak
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	87 {
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	88 "zip",
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	89 "VimCrypt~01!",
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	90 0,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	91 0,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	92 0,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	93 #ifdef CRYPT_NOT_INPLACE
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	94 TRUE,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	95 #endif
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	96 FALSE,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	97 NULL,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	98 crypt_zip_init,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	99 crypt_zip_encode, crypt_zip_decode,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	100 NULL, NULL,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	101 crypt_zip_encode, crypt_zip_decode,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	102 },
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	103
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	104 // Blowfish/CFB + SHA-256 custom key derivation; implementation issues.
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	105 {
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	106 "blowfish",
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	107 "VimCrypt~02!",
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	108 8,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	109 8,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	110 0,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	111 #ifdef CRYPT_NOT_INPLACE
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	112 TRUE,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	113 #endif
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	114 FALSE,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	115 blowfish_self_test,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	116 crypt_blowfish_init,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	117 crypt_blowfish_encode, crypt_blowfish_decode,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	118 NULL, NULL,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	119 crypt_blowfish_encode, crypt_blowfish_decode,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	120 },
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	121
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	122 // Blowfish/CFB + SHA-256 custom key derivation; fixed.
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	123 {
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	124 "blowfish2",
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	125 "VimCrypt~03!",
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	126 8,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	127 8,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	128 0,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	129 #ifdef CRYPT_NOT_INPLACE
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	130 TRUE,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	131 #endif
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	132 TRUE,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	133 blowfish_self_test,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	134 crypt_blowfish_init,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	135 crypt_blowfish_encode, crypt_blowfish_decode,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	136 NULL, NULL,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	137 crypt_blowfish_encode, crypt_blowfish_decode,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	138 },
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	139
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	140 // XChaCha20 using libsodium; implementation issues
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	141 {
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	142 "xchacha20",
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	143 "VimCrypt~04!",
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	144 #ifdef FEAT_SODIUM
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	145 crypto_pwhash_argon2id_SALTBYTES, // 16
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	146 #else
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	147 16,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	148 #endif
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	149 8,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	150 0,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	151 #ifdef CRYPT_NOT_INPLACE
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	152 FALSE,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	153 #endif
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	154 FALSE,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	155 NULL,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	156 crypt_sodium_init_,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	157 NULL, NULL,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	158 crypt_sodium_buffer_encode, crypt_sodium_buffer_decode,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	159 NULL, NULL,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	160 },
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	161 // XChaCha20 using libsodium; stores parameters in header
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	162 {
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	163 "xchacha20v2",
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	164 "VimCrypt~05!",
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	165 #ifdef FEAT_SODIUM
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	166 crypto_pwhash_argon2id_SALTBYTES, // 16
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	167 #else
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	168 16,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	169 #endif
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	170 8,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	171 // sizeof(crypto_pwhash_OPSLIMIT_INTERACTIVE + crypto_pwhash_MEMLIMIT_INTERACTIVE + crypto_pwhash_ALG_DEFAULT)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	172 20,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	173 #ifdef CRYPT_NOT_INPLACE
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	174 FALSE,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	175 #endif
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	176 FALSE,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	177 NULL,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	178 crypt_sodium_init_,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	179 NULL, NULL,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	180 crypt_sodium_buffer_encode, crypt_sodium_buffer_decode,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	181 NULL, NULL,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	182 },
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	183
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	184 // NOTE: when adding a new method, use some random bytes for the magic key,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	185 // to avoid that a text file is recognized as encrypted.
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	186 };
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	187
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	188 #if defined(FEAT_SODIUM) \|\| defined(PROTO)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	189 typedef struct {
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	190 size_t count;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	191 unsigned char key[crypto_box_SEEDBYTES];
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	192 // 32, same as crypto_secretstream_xchacha20poly1305_KEYBYTES
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	193 crypto_secretstream_xchacha20poly1305_state
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	194 state;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	195 } sodium_state_T;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	196
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	197
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	198 # ifdef DYNAMIC_SODIUM
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	199 # ifdef MSWIN
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	200 # define SODIUM_PROC FARPROC
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	201 # define load_dll vimLoadLib
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	202 # define symbol_from_dll GetProcAddress
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	203 # define close_dll FreeLibrary
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	204 # define load_dll_error GetWin32Error
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	205 # else
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	206 # error Dynamic loading of libsodium is not supported for now.
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	207 //# define HINSTANCE void*
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	208 //# define SODIUM_PROC void*
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	209 //# define load_dll(n) dlopen((n), RTLD_LAZY\|RTLD_GLOBAL)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	210 //# define symbol_from_dll dlsym
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	211 //# define close_dll dlclose
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	212 //# define load_dll_error dlerror
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	213 # endif
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	214
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	215 # define sodium_init load_sodium
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	216 # define sodium_free dll_sodium_free
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	217 # define sodium_malloc dll_sodium_malloc
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	218 # define sodium_memzero dll_sodium_memzero
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	219 # define sodium_mlock dll_sodium_mlock
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	220 # define sodium_munlock dll_sodium_munlock
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	221 # define crypto_secretstream_xchacha20poly1305_init_push \
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	222 dll_crypto_secretstream_xchacha20poly1305_init_push
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	223 # define crypto_secretstream_xchacha20poly1305_push \
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	224 dll_crypto_secretstream_xchacha20poly1305_push
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	225 # define crypto_secretstream_xchacha20poly1305_init_pull \
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	226 dll_crypto_secretstream_xchacha20poly1305_init_pull
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	227 # define crypto_secretstream_xchacha20poly1305_pull \
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	228 dll_crypto_secretstream_xchacha20poly1305_pull
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	229 # define crypto_pwhash dll_crypto_pwhash
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	230 # define randombytes_buf dll_randombytes_buf
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	231 # define randombytes_random dll_randombytes_random
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	232
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	233 static int (*dll_sodium_init)(void) = NULL;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	234 static void (dll_sodium_free)(void ) = NULL;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	235 static void (dll_sodium_malloc)(const size_t) = NULL;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	236 static void (dll_sodium_memzero)(void const, const size_t) = NULL;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	237 static int (dll_sodium_mlock)(void const, const size_t) = NULL;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	238 static int (dll_sodium_munlock)(void const, const size_t) = NULL;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	239 static int (*dll_crypto_secretstream_xchacha20poly1305_init_push)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	240 (crypto_secretstream_xchacha20poly1305_state *state,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	241 unsigned char [],
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	242 const unsigned char []) = NULL;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	243 static int (*dll_crypto_secretstream_xchacha20poly1305_push)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	244 (crypto_secretstream_xchacha20poly1305_state *state,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	245 unsigned char c, unsigned long long clen_p,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	246 const unsigned char *m, unsigned long long mlen,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	247 const unsigned char *ad, unsigned long long adlen, unsigned char tag)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	248 = NULL;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	249 static int (*dll_crypto_secretstream_xchacha20poly1305_init_pull)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	250 (crypto_secretstream_xchacha20poly1305_state *state,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	251 const unsigned char [],
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	252 const unsigned char []) = NULL;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	253 static int (*dll_crypto_secretstream_xchacha20poly1305_pull)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	254 (crypto_secretstream_xchacha20poly1305_state *state,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	255 unsigned char m, unsigned long long mlen_p, unsigned char *tag_p,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	256 const unsigned char *c, unsigned long long clen,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	257 const unsigned char *ad, unsigned long long adlen) = NULL;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	258 static int (dll_crypto_pwhash)(unsigned char const out,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	259 unsigned long long outlen,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	260 const char * const passwd, unsigned long long passwdlen,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	261 const unsigned char * const salt,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	262 unsigned long long opslimit, size_t memlimit, int alg)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	263 = NULL;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	264 static void (dll_randombytes_buf)(void const buf, const size_t size);
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	265 static uint32_t (*dll_randombytes_random)(void);
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	266
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	267 static struct {
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	268 const char *name;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	269 SODIUM_PROC *ptr;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	270 } sodium_funcname_table[] = {
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	271 {"sodium_init", (SODIUM_PROC*)&dll_sodium_init},
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	272 {"sodium_free", (SODIUM_PROC*)&dll_sodium_free},
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	273 {"sodium_malloc", (SODIUM_PROC*)&dll_sodium_malloc},
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	274 {"sodium_memzero", (SODIUM_PROC*)&dll_sodium_memzero},
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	275 {"sodium_mlock", (SODIUM_PROC*)&dll_sodium_mlock},
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	276 {"sodium_munlock", (SODIUM_PROC*)&dll_sodium_munlock},
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	277 {"crypto_secretstream_xchacha20poly1305_init_push", (SODIUM_PROC*)&dll_crypto_secretstream_xchacha20poly1305_init_push},
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	278 {"crypto_secretstream_xchacha20poly1305_push", (SODIUM_PROC*)&dll_crypto_secretstream_xchacha20poly1305_push},
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	279 {"crypto_secretstream_xchacha20poly1305_init_pull", (SODIUM_PROC*)&dll_crypto_secretstream_xchacha20poly1305_init_pull},
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	280 {"crypto_secretstream_xchacha20poly1305_pull", (SODIUM_PROC*)&dll_crypto_secretstream_xchacha20poly1305_pull},
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	281 {"crypto_pwhash", (SODIUM_PROC*)&dll_crypto_pwhash},
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	282 {"randombytes_buf", (SODIUM_PROC*)&dll_randombytes_buf},
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	283 {"randombytes_random", (SODIUM_PROC*)&dll_randombytes_random},
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	284 {NULL, NULL}
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	285 };
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	286
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	287 static int
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	288 sodium_runtime_link_init(int verbose)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	289 {
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	290 static HINSTANCE hsodium = NULL;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	291 const char *libname = DYNAMIC_SODIUM_DLL;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	292 int i;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	293
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	294 if (hsodium != NULL)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	295 return OK;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	296
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	297 hsodium = load_dll(libname);
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	298 if (hsodium == NULL)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	299 {
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	300 if (verbose)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	301 semsg(_(e_could_not_load_library_str_str), libname, load_dll_error());
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	302 return FAIL;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	303 }
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	304
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	305 for (i = 0; sodium_funcname_table[i].ptr; ++i)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	306 {
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	307 if ((*sodium_funcname_table[i].ptr = symbol_from_dll(hsodium,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	308 sodium_funcname_table[i].name)) == NULL)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	309 {
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	310 close_dll(hsodium);
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	311 hsodium = NULL;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	312 if (verbose)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	313 semsg(_(e_could_not_load_library_function_str), sodium_funcname_table[i].name);
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	314 return FAIL;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	315 }
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	316 }
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	317 return OK;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	318 }
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	319
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	320 static int
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	321 load_sodium(void)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	322 {
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	323 if (sodium_runtime_link_init(TRUE) == FAIL)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	324 return -1;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	325 return dll_sodium_init();
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	326 }
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	327 # endif
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	328
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	329 # if defined(DYNAMIC_SODIUM) \|\| defined(PROTO)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	330 int
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	331 sodium_enabled(int verbose)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	332 {
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	333 return sodium_runtime_link_init(verbose) == OK;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	334 }
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	335 # endif
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	336 #endif
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	337
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	338 #define CRYPT_MAGIC_LEN 12 // cannot change
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	339 static char crypt_magic_head[] = "VimCrypt~";
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	340
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	341 /*
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	342 * Return int value for crypt method name.
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	343 * 0 for "zip", the old method. Also for any non-valid value.
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	344 * 1 for "blowfish".
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	345 * 2 for "blowfish2".
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	346 */
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	347 int
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	348 crypt_method_nr_from_name(char_u *name)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	349 {
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	350 int i;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	351
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	352 for (i = 0; i < CRYPT_M_COUNT; ++i)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	353 if (STRCMP(name, cryptmethods[i].name) == 0)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	354 return i;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	355 return 0;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	356 }
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	357
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	358 /*
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	359 * Get the crypt method used for a file from "ptr[len]", the magic text at the
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	360 * start of the file.
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	361 * Returns -1 when no encryption used.
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	362 */
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	363 int
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	364 crypt_method_nr_from_magic(char *ptr, int len)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	365 {
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	366 int i;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	367
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	368 if (len < CRYPT_MAGIC_LEN)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	369 return -1;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	370
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	371 for (i = 0; i < CRYPT_M_COUNT; i++)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	372 if (memcmp(ptr, cryptmethods[i].magic, CRYPT_MAGIC_LEN) == 0)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	373 return i;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	374
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	375 i = (int)STRLEN(crypt_magic_head);
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	376 if (len >= i && memcmp(ptr, crypt_magic_head, i) == 0)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	377 emsg(_(e_file_is_encrypted_with_unknown_method));
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	378
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	379 return -1;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	380 }
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	381
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	382 #ifdef CRYPT_NOT_INPLACE
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	383 /*
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	384 * Return TRUE if the crypt method for "method_nr" can be done in-place.
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	385 */
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	386 int
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	387 crypt_works_inplace(cryptstate_T *state)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	388 {
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	389 return cryptmethods[state->method_nr].works_inplace;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	390 }
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	391 #endif
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	392
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	393 /*
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	394 * Get the crypt method for buffer "buf" as a number.
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	395 */
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	396 int
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	397 crypt_get_method_nr(buf_T *buf)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	398 {
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	399 return crypt_method_nr_from_name(*buf->b_p_cm == NUL ? p_cm : buf->b_p_cm);
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	400 }
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	401
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	402 /*
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	403 * Returns True for Sodium Encryption.
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	404 */
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	405 int
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	406 crypt_method_is_sodium(int method)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	407 {
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	408 return method == CRYPT_M_SOD \|\| method == CRYPT_M_SOD2;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	409 }
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	410
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	411 /*
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	412 * Return TRUE when the buffer uses an encryption method that encrypts the
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	413 * whole undo file, not only the text.
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	414 */
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	415 int
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	416 crypt_whole_undofile(int method_nr)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	417 {
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	418 return cryptmethods[method_nr].whole_undofile;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	419 }
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	420
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	421 /*
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	422 * Get crypt method specific length of the file header in bytes.
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	423 */
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	424 int
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	425 crypt_get_header_len(int method_nr)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	426 {
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	427 return CRYPT_MAGIC_LEN
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	428 + cryptmethods[method_nr].salt_len
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	429 + cryptmethods[method_nr].seed_len
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	430 + cryptmethods[method_nr].add_len;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	431 }
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	432
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	433
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	434 #if defined(FEAT_SODIUM) \|\| defined(PROTO)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	435 /*
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	436 * Get maximum crypt method specific length of the file header in bytes.
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	437 */
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	438 int
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	439 crypt_get_max_header_len(void)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	440 {
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	441 int i;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	442 int max = 0;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	443 int temp = 0;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	444
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	445 for (i = 0; i < CRYPT_M_COUNT; ++i)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	446 {
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	447 temp = crypt_get_header_len(i);
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	448 if (temp > max)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	449 max = temp;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	450 }
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	451 return max;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	452 }
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	453 #endif
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	454
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	455 /*
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	456 * Set the crypt method for buffer "buf" to "method_nr" using the int value as
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	457 * returned by crypt_method_nr_from_name().
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	458 */
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	459 void
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	460 crypt_set_cm_option(buf_T *buf, int method_nr)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	461 {
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	462 free_string_option(buf->b_p_cm);
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	463 buf->b_p_cm = vim_strsave((char_u *)cryptmethods[method_nr].name);
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	464 }
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	465
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	466 /*
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	467 * If the crypt method for the current buffer has a self-test, run it and
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	468 * return OK/FAIL.
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	469 */
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	470 int
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	471 crypt_self_test(void)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	472 {
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	473 int method_nr = crypt_get_method_nr(curbuf);
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	474
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	475 if (cryptmethods[method_nr].self_test_fn == NULL)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	476 return OK;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	477 return cryptmethods[method_nr].self_test_fn();
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	478 }
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	479
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	480 /*
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	481 * Allocate a crypt state and initialize it.
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	482 * Return NULL for failure.
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	483 */
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	484 cryptstate_T *
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	485 crypt_create(
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	486 int method_nr,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	487 char_u *key,
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	488 crypt_arg_T *crypt_arg)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	489 {
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	490 cryptstate_T *state = ALLOC_ONE(cryptstate_T);
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	491
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	492 if (state == NULL)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	493 return state;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	494
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	495 state->method_nr = method_nr;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	496 if (cryptmethods[method_nr].init_fn(state, key, crypt_arg) == FAIL)
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	497 {
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	498 vim_free(state);
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	499 return NULL;
448aef880252 normalize line endings Christian Brabandt <cb@256bit.org> parents: 32503 diff changeset	500 }

32669

448aef880252 normalize line endings