AppFS
Check-in [5ffd966f05]
Login
HomeTimelineFilesBranchesTagsTicketsWiki
Overview
Comment:Merged in internal_sha1 branch since we should use that as the basis going forward
Downloads: Tarball | ZIP archive | SQL archive
Timelines: family | ancestors | descendants | both | tcl-ops
Files: files | file ages | folders
SHA1: 5ffd966f0575277610544b9a7c5d9b603f2c12df
User & Date: rkeene on 2014-11-06 16:20:39
Other Links: branch diff | manifest | tags
Context
2014-11-06
17:11
Work towards gutting AppFSd to rewrite check-in: aca3a93d56 user: rkeene tags: tcl-ops
16:20
Merged in internal_sha1 branch since we should use that as the basis going forward check-in: 5ffd966f05 user: rkeene tags: tcl-ops
16:19
Create new branch named "tcl-ops" check-in: a80b5fa283 user: rkeene tags: tcl-ops
02:29
Updated to use C-based implementation of SHA1 Closed-Leaf check-in: 853a9068a7 user: rkeene tags: internal_sha1
Changes
Hide Diffs Side-by-Side Diffs Ignore Whitespace Patch

Modified .fossil-settings/ignore-glob from [5155de6731] to [6f815d9a84]. 

1
2
3



1
2
3
4
5




+
+

appfsd
appfsd.o
appfsd.tcl.h
sha1.o
sha1.tcl.h

Modified Makefile from [bee1193267] to [a8fe70a2c7].

︙
20
21
22
23
24
25
26
27
28


29
30
31
32



33
34
35



36
37
38
39
40
41
42
43

44
45
46
47

20
21
22
23
24
25
26


27
28
29
30
31
32
33
34
35



36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51








-
-
+
+




+
+
+
-
-
-
+
+
+








+





TCLCONFIG_SH_PATH = $(shell echo 'puts [::tcl::pkgconfig get libdir,install]' | tclsh)/tclConfig.sh
endif
TCL_CFLAGS = $(shell . $(TCLCONFIG_SH_PATH); echo "$${TCL_INCLUDE_SPEC}")
TCL_LIBS = $(shell . $(TCLCONFIG_SH_PATH); echo "$${TCL_LIB_SPEC}")

all: appfsd

appfsd: appfsd.o
	$(CC) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) -o appfsd appfsd.o $(LIBS)
appfsd: appfsd.o sha1.o
	$(CC) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) -o appfsd appfsd.o sha1.o $(LIBS)

appfsd.o: appfsd.c appfsd.tcl.h
	$(CC) $(CPPFLAGS) $(CFLAGS) -o appfsd.o -c appfsd.c

sha1.o: sha1.c sha1.tcl.h
	$(CC) $(CPPFLAGS) $(CFLAGS) -o sha1.o -c sha1.c

appfsd.tcl.h: appfsd.tcl sha1.tcl
	sed '/@@SHA1\.TCL@@/ r sha1.tcl' appfsd.tcl | sed '/@@SHA1\.TCL@@/ d' | sed 's@[\\"]@\\&@g;s@^@   "@;s@$$@\\n"@' > appfsd.tcl.h.new
	mv appfsd.tcl.h.new appfsd.tcl.h
%.tcl.h: %.tcl
	sed 's@[\\"]@\\&@g;s@^@   "@;s@$$@\\n"@' $^ > $@.new
	mv $@.new $@

install: appfsd
	if [ ! -d '$(DESTDIR)$(sbindir)' ]; then mkdir -p '$(DESTDIR)$(sbindir)'; chmod 755 '$(DESTDIR)$(sbindir)'; fi
	cp appfsd '$(DESTDIR)$(sbindir)/'

clean:
	rm -f appfsd appfsd.o
	rm -f appfsd.tcl.h
	rm -f sha1.o sha1.tcl.h

distclean: clean

.PHONY: all test clean distclean install

Modified appfsd.c from [251c8531b4] to [a8794a7145].

︙
10
11
12
13
14
15
16



17
18
19
20
21
22
23

10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26








+
+
+








#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <fuse.h>
#include <pwd.h>
#include <tcl.h>

/* From sha1.c */
int Sha1_Init(Tcl_Interp *interp);

#ifndef APPFS_CACHEDIR
#define APPFS_CACHEDIR "/var/cache/appfs"
#endif

#ifdef DEBUG
#define APPFS_DEBUG(x...) { fprintf(stderr, "[debug] %s:%i:%s: ", __FILE__, __LINE__, __func__); fprintf(stderr, x); fprintf(stderr, "\n"); }
#else
︙
92
93
94
95
96
97
98











99
100
101
102
103
104
105

95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119








+
+
+
+
+
+
+
+
+
+
+









		return(NULL);
	}

	tcl_ret = Tcl_Init(interp);
	if (tcl_ret != TCL_OK) {
		fprintf(stderr, "Unable to initialize Tcl.  Aborting.\n");
		fprintf(stderr, "Tcl Error is: %s\n", Tcl_GetStringResult(interp));

		Tcl_DeleteInterp(interp);

		return(NULL);
	}

	tcl_ret = Tcl_Eval(interp, "package ifneeded sha1 1.0 [list load {} sha1]");
	if (tcl_ret != TCL_OK) {
		fprintf(stderr, "Unable to initialize Tcl SHA1.  Aborting.\n");
		fprintf(stderr, "Tcl Error is: %s\n", Tcl_GetStringResult(interp));

		Tcl_DeleteInterp(interp);

		return(NULL);
	}

	tcl_ret = Tcl_Eval(interp, ""
︙
1152
1153
1154
1155
1156
1157
1158


1159
1160
1161
1162
1163
1164
1165

1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181








+
+








	char dbfilename[1024];
	int pthread_ret, snprintf_ret, sqlite_ret;

	globalThread.cachedir = cachedir;
	globalThread.boottime = time(NULL);
	globalThread.platform = "linux-x86_64";
	globalThread.options.writable = 1;

	Tcl_StaticPackage(NULL, "sha1", Sha1_Init, NULL);

	pthread_ret = pthread_key_create(&interpKey, NULL);
	if (pthread_ret != 0) {
		fprintf(stderr, "Unable to create TSD key for Tcl.  Aborting.\n");

		return(1);
	}
︙

Modified appfsd.tcl from [86cb2b92c8] to [1a0526f9cf]. 

1
2
3
4
5
6
7

8
9
10
11
12
13
14
15
16
17
18

1
2
3
4



5




6
7
8
9
10
11
12





-
-
-
+
-
-
-
-








#! /usr/bin/env tclsh

package require http 2.7
package require sqlite3

if {[catch {
	package require sha1
package require sha1
}]} {
	@@SHA1.TCL@@
	package require sha1
}

namespace eval ::appfs {
	variable cachedir "/tmp/appfs-cache"
	variable ttl 3600
	variable nttl 60

	proc _hash_sep {hash {seps 4}} {
︙

Added sha1.c version [a59d293e66]. 




































































































































































































































































































































1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322

+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+

/*
	SHA-1 in C
	By Steve Reid <steve@edmweb.com>
	100% Public Domain

Test Vectors (from FIPS PUB 180-1)
"abc"
  A9993E36 4706816A BA3E2571 7850C26C 9CD0D89D
"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"
  84983E44 1C3BD26E BAAE4AA1 F95129E5 E54670F1
A million repetitions of "a"
  34AA973C D4C4DAA4 F61EEB2B DBAD2731 6534016F
*/

/* #define LITTLE_ENDIAN * This should be #define'd if true. */
/* #define SHA1HANDSOFF * Copies data before messing with it. */
#include <tcl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdint.h>
#include <string.h>
#include <fcntl.h>
#include <stdio.h>

#define SHA1HANDSOFF 1

typedef struct {
	uint32_t state[5];
	uint32_t count[2];
	uint8_t  buffer[64];
} SHA1_CTX;

#ifndef __BIG_ENDIAN
#define __BIG_ENDIAN 4321
#endif
#ifndef __LITTLE_ENDIAN
#define __LITTLE_ENDIAN 1234
#endif

#ifndef __BYTE_ORDER
#ifdef WORDS_BIGENDIAN
#define __BYTE_ORDER __BIG_ENDIAN
#else
#define __BYTE_ORDER __LITTLE_ENDIAN
#endif
#endif

#if __BYTE_ORDER == __BIG_ENDIAN
#ifndef BIG_ENDIAN
#define BIG_ENDIAN 1
#endif
#undef LITTLE_ENDIAN
#else
#ifndef LITTLE_ENDIAN
#define LITTLE_ENDIAN 1
#endif
#undef BIG_ENDIAN
#endif

#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))

/* blk0() and blk() perform the initial expand. */
/* I got the idea of expanding during the round function from SSLeay */
#ifdef LITTLE_ENDIAN
#define blk0(i) (block->l[i] = (rol(block->l[i],24)&0xFF00FF00) \
    |(rol(block->l[i],8)&0x00FF00FF))
#else
#define blk0(i) block->l[i]
#endif
#define blk(i) (block->l[i&15] = rol(block->l[(i+13)&15]^block->l[(i+8)&15] \
    ^block->l[(i+2)&15]^block->l[i&15],1))

/* (R0+R1), R2, R3, R4 are the different operations used in SHA1 */
#define R0(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk0(i)+0x5A827999+rol(v,5);w=rol(w,30);
#define R1(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk(i)+0x5A827999+rol(v,5);w=rol(w,30);
#define R2(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0x6ED9EBA1+rol(v,5);w=rol(w,30);
#define R3(v,w,x,y,z,i) z+=(((w|x)&y)|(w&x))+blk(i)+0x8F1BBCDC+rol(v,5);w=rol(w,30);
#define R4(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0xCA62C1D6+rol(v,5);w=rol(w,30);


/* Hash a single 512-bit block. This is the core of the algorithm. */

static void SHA1Transform(uint32_t state[5], uint8_t buffer[64]) {
	uint32_t a, b, c, d, e;
	typedef union {
		uint8_t  c[64];
		uint32_t l[16];
	} CHAR64LONG16;
	CHAR64LONG16* block;
#ifdef SHA1HANDSOFF
	uint8_t workspace[sizeof(*block)];

	block = (CHAR64LONG16*)workspace;
	memcpy(block, buffer, sizeof(*block));
#else
	block = (CHAR64LONG16*)buffer;
#endif

	/* Copy context->state[] to working vars */
	a = state[0];
	b = state[1];
	c = state[2];
	d = state[3];
	e = state[4];

	/* 4 rounds of 20 operations each. Loop unrolled. */
	R0(a,b,c,d,e, 0); R0(e,a,b,c,d, 1); R0(d,e,a,b,c, 2); R0(c,d,e,a,b, 3);
	R0(b,c,d,e,a, 4); R0(a,b,c,d,e, 5); R0(e,a,b,c,d, 6); R0(d,e,a,b,c, 7);
	R0(c,d,e,a,b, 8); R0(b,c,d,e,a, 9); R0(a,b,c,d,e,10); R0(e,a,b,c,d,11);
	R0(d,e,a,b,c,12); R0(c,d,e,a,b,13); R0(b,c,d,e,a,14); R0(a,b,c,d,e,15);
	R1(e,a,b,c,d,16); R1(d,e,a,b,c,17); R1(c,d,e,a,b,18); R1(b,c,d,e,a,19);
	R2(a,b,c,d,e,20); R2(e,a,b,c,d,21); R2(d,e,a,b,c,22); R2(c,d,e,a,b,23);
	R2(b,c,d,e,a,24); R2(a,b,c,d,e,25); R2(e,a,b,c,d,26); R2(d,e,a,b,c,27);
	R2(c,d,e,a,b,28); R2(b,c,d,e,a,29); R2(a,b,c,d,e,30); R2(e,a,b,c,d,31);
	R2(d,e,a,b,c,32); R2(c,d,e,a,b,33); R2(b,c,d,e,a,34); R2(a,b,c,d,e,35);
	R2(e,a,b,c,d,36); R2(d,e,a,b,c,37); R2(c,d,e,a,b,38); R2(b,c,d,e,a,39);
	R3(a,b,c,d,e,40); R3(e,a,b,c,d,41); R3(d,e,a,b,c,42); R3(c,d,e,a,b,43);
	R3(b,c,d,e,a,44); R3(a,b,c,d,e,45); R3(e,a,b,c,d,46); R3(d,e,a,b,c,47);
	R3(c,d,e,a,b,48); R3(b,c,d,e,a,49); R3(a,b,c,d,e,50); R3(e,a,b,c,d,51);
	R3(d,e,a,b,c,52); R3(c,d,e,a,b,53); R3(b,c,d,e,a,54); R3(a,b,c,d,e,55);
	R3(e,a,b,c,d,56); R3(d,e,a,b,c,57); R3(c,d,e,a,b,58); R3(b,c,d,e,a,59);
	R4(a,b,c,d,e,60); R4(e,a,b,c,d,61); R4(d,e,a,b,c,62); R4(c,d,e,a,b,63);
	R4(b,c,d,e,a,64); R4(a,b,c,d,e,65); R4(e,a,b,c,d,66); R4(d,e,a,b,c,67);
	R4(c,d,e,a,b,68); R4(b,c,d,e,a,69); R4(a,b,c,d,e,70); R4(e,a,b,c,d,71);
	R4(d,e,a,b,c,72); R4(c,d,e,a,b,73); R4(b,c,d,e,a,74); R4(a,b,c,d,e,75);
	R4(e,a,b,c,d,76); R4(d,e,a,b,c,77); R4(c,d,e,a,b,78); R4(b,c,d,e,a,79);

	/* Add the working vars back into context.state[] */
	state[0] += a;
	state[1] += b;
	state[2] += c;
	state[3] += d;
	state[4] += e;

	/* Wipe variables */
	a = b = c = d = e = 0;
}


/* SHA1Init - Initialize new context */
static void SHA1Init(SHA1_CTX* context) {
	/* SHA1 initialization constants */
	context->state[0] = 0x67452301;
	context->state[1] = 0xEFCDAB89;
	context->state[2] = 0x98BADCFE;
	context->state[3] = 0x10325476;
	context->state[4] = 0xC3D2E1F0;
	context->count[0] = 0;
	context->count[1] = 0;
}


/* Run your data through this. */
static void SHA1Update(SHA1_CTX* context, unsigned char* data, unsigned int len) {
	unsigned int i, j;

	j = (context->count[0] >> 3) & 63;
	if ((context->count[0] += len << 3) < (len << 3)) {
		context->count[1]++;
	}

	context->count[1] += (len >> 29);

	if ((j + len) > 63) {
		memcpy(&context->buffer[j], data, (i = 64-j));
		SHA1Transform(context->state, context->buffer);
		for ( ; i + 63 < len; i += 64) {
			SHA1Transform(context->state, &data[i]);
		}
		j = 0;
	} else {
		i = 0;
	}

	memcpy(&context->buffer[j], &data[i], len - i);
}


/* Add padding and return the message digest. */
static void SHA1Final(unsigned char digest[20], SHA1_CTX* context) {
	unsigned long i;
	unsigned char finalcount[8];

	for (i = 0; i < 8; i++) {
		finalcount[i] = (unsigned char)((context->count[(i >= 4 ? 0 : 1)] >> ((3-(i & 3)) * 8) ) & 255);  /* Endian independent */
	}

	SHA1Update(context, (unsigned char *) "\200", 1);

	while ((context->count[0] & 504) != 448) {
		SHA1Update(context, (unsigned char *)"\0", 1);
	}

	SHA1Update(context, finalcount, 8);  /* Should cause a SHA1Transform() */
	for (i = 0; i < 20; i++) {
		digest[i] = (unsigned char) ((context->state[i>>2] >> ((3-(i & 3)) * 8) ) & 255);
	}

	/* Wipe variables */
	i = 0;

	memset(context->buffer, 0, 64);
	memset(context->state, 0, 20);
	memset(context->count, 0, 8);
	memset(&finalcount, 0, 8);
#ifdef SHA1HANDSOFF  /* make SHA1Transform overwrite it's own static vars */
	SHA1Transform(context->state, context->buffer);
#endif
}

static Tcl_Obj* c_sha1__sha1_file(char* file) {
	SHA1_CTX ctx;
	unsigned char digest[20];
	unsigned char buf[4096];
	int fd;
	ssize_t read_ret;
	Tcl_Obj *ret;

	fd = open(file, O_RDONLY);
	if (fd < 0) {
		return(NULL);
	}

	SHA1Init(&ctx);

	while (1) {
		read_ret = read(fd, buf, sizeof(buf));

		if (read_ret == 0) {
			break;
		}

		if (read_ret < 0) {
			close(fd);

			return(NULL);
		}

		SHA1Update(&ctx, buf, read_ret);
	}

	close(fd);

	SHA1Final(digest, &ctx);

	ret = Tcl_NewByteArrayObj(digest, sizeof(digest));

	return(ret);
}

static int tcl_sha1__sha1_file(ClientData dummy, Tcl_Interp *ip, int objc, Tcl_Obj *CONST objv[]) {
	char* _file;
	Tcl_Obj* rv;
	if (objc != 2) {
		Tcl_WrongNumArgs(ip, 1, objv, "file");
		return TCL_ERROR;
	}
	_file = Tcl_GetString(objv[1]);

	rv = c_sha1__sha1_file(_file);
	if (rv == NULL) {
		return(TCL_ERROR);
	}
	Tcl_SetObjResult(ip, rv);
	return TCL_OK;
}

static Tcl_Obj* c_sha1__sha1_string(Tcl_Obj* str) {
	SHA1_CTX ctx;
	unsigned char digest[20];
	unsigned char *buf;
	int buf_len;
	Tcl_Obj *ret;

	SHA1Init(&ctx);

	buf = Tcl_GetByteArrayFromObj(str, &buf_len);
	if (buf == NULL) {
		return(NULL);
	}

	SHA1Update(&ctx, buf, buf_len);

	SHA1Final(digest, &ctx);

	ret = Tcl_NewByteArrayObj(digest, sizeof(digest));

	return(ret);
}

static int tcl_sha1__sha1_string(ClientData dummy, Tcl_Interp *ip, int objc, Tcl_Obj *CONST objv[]) {
	Tcl_Obj* _str;
	Tcl_Obj* rv;
	if (objc != 2) {
		Tcl_WrongNumArgs(ip, 1, objv, "str");
		return TCL_ERROR;
	}
	_str = objv[1];

	rv = c_sha1__sha1_string(_str);
	if (rv == NULL) {
		return(TCL_ERROR);
	}
	Tcl_SetObjResult(ip, rv);
	return TCL_OK;
}

int Sha1_Init(Tcl_Interp *interp) {
#ifdef USE_TCL_STUBS
	if (Tcl_InitStubs(interp, TCL_VERSION, 0) == 0L) {
		return TCL_ERROR;
	}
#endif
	Tcl_CreateObjCommand(interp, "sha1::_sha1_file", tcl_sha1__sha1_file, NULL, NULL);
	Tcl_CreateObjCommand(interp, "sha1::_sha1_string", tcl_sha1__sha1_string, NULL, NULL);
	Tcl_Eval(interp,
#include "sha1.tcl.h"
	);
	Tcl_PkgProvide(interp, "sha1", "1.0");
	return(TCL_OK);
}








Modified sha1.tcl
from [a8b3b2afbe]
to [235aac1913].



1
2

3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34

35
36

37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81

82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126

127
128
129
130
131


132
133
134
135
136
137

138
139
140
141
142
143
144

145
146
147
148
149
150
151
152
153

154
155
156

157
158
159
160
161
162
163
164

165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237

238
239
240
241
242
243
244
245
246
247

248
249
250
251
252
253
254
255
256
257

258
259
260
261
262
263
264
265
266
267

268
269
270
271
272
273
274
275
276
277

278
279
280
281
282
283
284
285
286
287

288
289

290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305


306
307
308
309
310

311
312
313
314
315
316
317

318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380

381
382
383
384
385
386

387
388
389
390
391
392

393
394
395
396
397
398

399
400
401
402
403
404

405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441

442
443
444
445
446
447
448
449
450
451
452
453
454
455
456

457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475

476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495

496
497

498
499
500
501

502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545

546
547
548
549
550

551
552
553
554

555
556
557
558

559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596

597
598
599
600
601
602
603
604
605
606
607



1







2
























3


4








































5




6













































7





8
9






10







11









12



13








14



































































15





16










17










18










19










20










21


22
















23
24





25







26































































27






28






29






30






31





































32















33



















34




















35


36




37












































38





39




40




41
42





































43
44











-
-
+
-
-
-
-
-
-
-

-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
+
-
-
+
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-

-
-
-
-
+
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
+
-
-
-
-
-
+
+
-
-
-
-
-
-
+
-
-
-
-
-
-
-
+
-
-
-
-
-
-
-
-
-
+
-
-
-
+
-
-
-
-
-
-
-
-
+
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-

-
-
-
-
-
+
-
-
-
-
-
-
-
-
-
-
+
-
-
-
-
-
-
-
-
-
-
+
-
-
-
-
-
-
-
-
-
-
+
-
-
-
-
-
-
-
-
-
-
+
-
-
-
-
-
-
-
-
-
-
+
-
-
+
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
+
+
-
-
-
-
-
+
-
-
-
-
-
-
-
+
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
+
-
-
-
-
-
-
+
-
-
-
-
-
-
+
-
-
-
-
-
-
+
-
-
-
-
-
-
+
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
+
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
+
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
+
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
+
-
-
+
-
-
-
-
+
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
+
-
-
-
-
-
+
-
-
-
-
+
-
-
-
-
+

-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
+

-
-
-
-
-
-
-
-
-
-

# sha1.tcl - 

#! /usr/bin/env tclsh
# @@ Meta Begin
# Package sha1 2.0.3
# Meta platform           tcl
# Meta rsk::build::date   2011-03-30
# Meta description        Part of the Tclib sha1 module
# Meta require            {Tcl 8.2}
# @@ Meta End

#
# Copyright (C) 2001 Don Libes <libes@nist.gov>
# Copyright (C) 2003 Pat Thoyts <patthoyts@users.sourceforge.net>
#
# SHA1 defined by FIPS 180-1, "The SHA1 Message-Digest Algorithm"
# HMAC defined by RFC 2104, "Keyed-Hashing for Message Authentication"
#
# This is an implementation of SHA1 based upon the example code given in
# FIPS 180-1 and upon the tcllib MD4 implementation and taking some ideas
# and methods from the earlier tcllib sha1 version by Don Libes.
#
# This implementation permits incremental updating of the hash and 
# provides support for external compiled implementations either using
# critcl (sha1c) or Trf.
#
# ref: http://www.itl.nist.gov/fipspubs/fip180-1.htm
#
# -------------------------------------------------------------------------
# See the file "license.terms" for information on usage and redistribution
# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
# -------------------------------------------------------------------------
#
# $Id: sha1.tcl,v 1.22 2009/05/07 00:35:10 patthoyts Exp $

proc sha1::sha1 args {
# @mdgen EXCLUDE: sha1c.tcl

	set outputmode "hex"
package require Tcl 8.2;                # tcl minimum version

namespace eval ::sha1 {
    variable  version 2.0.3
    namespace export sha1 hmac SHA1Init SHA1Update SHA1Final
    variable uid
    if {![info exists uid]} {
        set uid 0
    }
}

proc ::sha1::SHA1Init {} {
    variable uid
    set token [namespace current]::[incr uid]
    upvar #0 $token state

    # FIPS 180-1: 7 - Initialize the hash state
    array set state \
        [list \
             A [expr {int(0x67452301)}] \
             B [expr {int(0xEFCDAB89)}] \
             C [expr {int(0x98BADCFE)}] \
             D [expr {int(0x10325476)}] \
             E [expr {int(0xC3D2E1F0)}] \
             n 0 i "" ]
    return $token
}

# SHA1Update --
#
#   This is called to add more data into the hash. You may call this
#   as many times as you require. Note that passing in "ABC" is equivalent
#   to passing these letters in as separate calls -- hence this proc 
#   permits hashing of chunked data
#
#   If we have a C-based implementation available, then we will use
#   it here in preference to the pure-Tcl implementation.
#
proc ::sha1::SHA1Update {token data} {
    upvar #0 $token state

    # Update the state values
    incr state(n) [string length $data]
    append state(i) $data

	if {[lindex $args 0] == "-hex"} {
    # Calculate the hash for any complete blocks
    set len [string length $state(i)]
    for {set n 0} {($n + 64) <= $len} {} {
        SHA1Transform $token [string range $state(i) $n [incr n 64]]
    }

    # Adjust the state for the blocks completed.
    set state(i) [string range $state(i) $n end]
    return
}

# SHA1Final --
#
#    This procedure is used to close the current hash and returns the
#    hash data. Once this procedure has been called the hash context
#    is freed and cannot be used again.
#
#    Note that the output is 160 bits represented as binary data.
#
proc ::sha1::SHA1Final {token} {
    upvar #0 $token state

    # Padding
    #
    set len [string length $state(i)]
    set pad [expr {56 - ($len % 64)}]
    if {$len % 64 > 56} {
        incr pad 64
    }
    if {$pad == 0} {
        incr pad 64
    }
    append state(i) [binary format a$pad \x80]

    # Append length in bits as big-endian wide int.
    set dlen [expr {8 * $state(n)}]
    append state(i) [binary format II 0 $dlen]

    # Calculate the hash for the remaining block.
    set len [string length $state(i)]
    for {set n 0} {($n + 64) <= $len} {} {
        SHA1Transform $token [string range $state(i) $n [incr n 64]]
    }

    # Output
		set outputmode "hex"
    set r [bytes $state(A)][bytes $state(B)][bytes $state(C)][bytes $state(D)][bytes $state(E)]
    unset state
    return $r
}


		set args [lrange $args 1 end]
# -------------------------------------------------------------------------
# HMAC Hashed Message Authentication (RFC 2104)
#
# hmac = H(K xor opad, H(K xor ipad, text))
#

	} elseif {[lindex $args 0] == "-bin"} {
# HMACInit --
#
#    This is equivalent to the SHA1Init procedure except that a key is
#    added into the algorithm
#
proc ::sha1::HMACInit {K} {

		set outputmode "binary"
    # Key K is adjusted to be 64 bytes long. If K is larger, then use
    # the SHA1 digest of K and pad this instead.
    set len [string length $K]
    if {$len > 64} {
        set tok [SHA1Init]
        SHA1Update $tok $K
        set K [SHA1Final $tok]
        set len [string length $K]
    }

    set pad [expr {64 - $len}]
    append K [string repeat \0 $pad]

		set args [lrange $args 1 end]
    # Cacluate the padding buffers.
    set Ki {}
    set Ko {}
    binary scan $K i16 Ks
    foreach k $Ks {
        append Ki [binary format i [expr {$k ^ 0x36363636}]]
        append Ko [binary format i [expr {$k ^ 0x5c5c5c5c}]]
    }
	}

    set tok [SHA1Init]
    SHA1Update $tok $Ki;                 # initialize with the inner pad
    
    # preserve the Ko value for the final stage.
    # FRINK: nocheck
    set [subst $tok](Ko) $Ko

    return $tok
}

# HMACUpdate --
#
#    Identical to calling SHA1Update
#
proc ::sha1::HMACUpdate {token data} {
    SHA1Update $token $data
    return
}

# HMACFinal --
#
#    This is equivalent to the SHA1Final procedure. The hash context is
#    closed and the binary representation of the hash result is returned.
#
proc ::sha1::HMACFinal {token} {
    upvar #0 $token state

    set tok [SHA1Init];                 # init the outer hashing function
    SHA1Update $tok $state(Ko);         # prepare with the outer pad.
    SHA1Update $tok [SHA1Final $token]; # hash the inner result
    return [SHA1Final $tok]
}

# -------------------------------------------------------------------------
# Description:
#  This is the core SHA1 algorithm. It is a lot like the MD4 algorithm but
#  includes an extra round and a set of constant modifiers throughout.
#
set ::sha1::SHA1Transform_body {
    upvar #0 $token state

    # FIPS 180-1: 7a: Process Message in 16-Word Blocks
    binary scan $msg I* blocks
    set blockLen [llength $blocks]
    for {set i 0} {$i < $blockLen} {incr i 16} {
        set W [lrange $blocks $i [expr {$i+15}]]
        
        # FIPS 180-1: 7b: Expand the input into 80 words
        # For t = 16 to 79 
        #   let Wt = (Wt-3 ^ Wt-8 ^ Wt-14 ^ Wt-16) <<< 1
        set t3  12
        set t8   7
        set t14  1
        set t16 -1
        for {set t 16} {$t < 80} {incr t} {
            set x [expr {[lindex $W [incr t3]] ^ [lindex $W [incr t8]] ^ \
                             [lindex $W [incr t14]] ^ [lindex $W [incr t16]]}]
            lappend W [expr {int(($x << 1) | (($x >> 31) & 1))}]
        }
        
        # FIPS 180-1: 7c: Copy hash state.
        set A $state(A)
        set B $state(B)
        set C $state(C)
        set D $state(D)
        set E $state(E)

        # FIPS 180-1: 7d: Do permutation rounds
        # For t = 0 to 79 do
        #   TEMP = (A<<<5) + ft(B,C,D) + E + Wt + Kt;
        #   E = D; D = C; C = S30(B); B = A; A = TEMP;

	if {[llength $args] == 2} {
        # Round 1: ft(B,C,D) = (B & C) | (~B & D) ( 0 <= t <= 19)
        for {set t 0} {$t < 20} {incr t} {
            set TEMP [F1 $A $B $C $D $E [lindex $W $t]]
            set E $D
            set D $C
            set C [rotl32 $B 30]
            set B $A
            set A $TEMP
        }

		set mode [lindex $args 0]
        # Round 2: ft(B,C,D) = (B ^ C ^ D) ( 20 <= t <= 39)
        for {} {$t < 40} {incr t} {
            set TEMP [F2 $A $B $C $D $E [lindex $W $t]]
            set E $D
            set D $C
            set C [rotl32 $B 30]
            set B $A
            set A $TEMP
        }

	} elseif {[llength $args] == 1} {
        # Round 3: ft(B,C,D) = ((B & C) | (B & D) | (C & D)) ( 40 <= t <= 59)
        for {} {$t < 60} {incr t} {
            set TEMP [F3 $A $B $C $D $E [lindex $W $t]]
            set E $D
            set D $C
            set C [rotl32 $B 30]
            set B $A
            set A $TEMP
         }

		set mode "-string"
        # Round 4: ft(B,C,D) = (B ^ C ^ D) ( 60 <= t <= 79)
        for {} {$t < 80} {incr t} {
            set TEMP [F4 $A $B $C $D $E [lindex $W $t]]
            set E $D
            set D $C
            set C [rotl32 $B 30]
            set B $A
            set A $TEMP
        }

	} else {
        # Then perform the following additions. (That is, increment each
        # of the four registers by the value it had before this block
        # was started.)
        incr state(A) $A
        incr state(B) $B
        incr state(C) $C
        incr state(D) $D
        incr state(E) $E
    }

		return -code error "wrong # args: sha1::sha1 ?-bin|-hex? ?-channel channel|-file file|string?"
    return
}
	}

proc ::sha1::F1 {A B C D E W} {
    expr {(((($A << 5) & 0xffffffff) | (($A >> 27) & 0x1f)) \
               + ($D ^ ($B & ($C ^ $D))) + $E + $W + 0x5a827999) & 0xffffffff}
}

proc ::sha1::F2 {A B C D E W} {
    expr {(((($A << 5) & 0xffffffff) | (($A >> 27) & 0x1f)) \
               + ($B ^ $C ^ $D) + $E + $W + 0x6ed9eba1) & 0xffffffff}
}

proc ::sha1::F3 {A B C D E W} {
    expr {(((($A << 5) & 0xffffffff)| (($A >> 27) & 0x1f)) \
               + (($B & $C) | ($D & ($B | $C))) + $E + $W + 0x8f1bbcdc) & 0xffffffff}
}


	switch -- $mode {
proc ::sha1::F4 {A B C D E W} {
    expr {(((($A << 5) & 0xffffffff)| (($A >> 27) & 0x1f)) \
               + ($B ^ $C ^ $D) + $E + $W + 0xca62c1d6) & 0xffffffff}
}

		"-channel" {
proc ::sha1::rotl32 {v n} {
    return [expr {((($v << $n) \
                        | (($v >> (32 - $n)) \
                               & (0x7FFFFFFF >> (31 - $n))))) \
                      & 0xFFFFFFFF}]
}

			return -code error "Not implemented"

# -------------------------------------------------------------------------
# 
# In order to get this code to go as fast as possible while leaving
# the main code readable we can substitute the above function bodies
# into the transform procedure. This inlines the code for us an avoids
# a procedure call overhead within the loops.
#
# We can do some minor tweaking to improve speed on Tcl < 8.5 where we
# know our arithmetic is limited to 64 bits. On > 8.5 we may have 
# unconstrained integer arithmetic and must avoid letting it run away.
#

regsub -all -line \
    {\[F1 \$A \$B \$C \$D \$E (\[.*?\])\]} \
    $::sha1::SHA1Transform_body \
    {[expr {(rotl32($A,5) + ($D ^ ($B \& ($C ^ $D))) + $E + \1 + 0x5a827999) \& 0xffffffff}]} \
    ::sha1::SHA1Transform_body_tmp

regsub -all -line \
    {\[F2 \$A \$B \$C \$D \$E (\[.*?\])\]} \
    $::sha1::SHA1Transform_body_tmp \
    {[expr {(rotl32($A,5) + ($B ^ $C ^ $D) + $E + \1 + 0x6ed9eba1) \& 0xffffffff}]} \
    ::sha1::SHA1Transform_body_tmp

regsub -all -line \
    {\[F3 \$A \$B \$C \$D \$E (\[.*?\])\]} \
    $::sha1::SHA1Transform_body_tmp \
    {[expr {(rotl32($A,5) + (($B \& $C) | ($D \& ($B | $C))) + $E + \1 + 0x8f1bbcdc) \& 0xffffffff}]} \
    ::sha1::SHA1Transform_body_tmp

regsub -all -line \
    {\[F4 \$A \$B \$C \$D \$E (\[.*?\])\]} \
    $::sha1::SHA1Transform_body_tmp \
    {[expr {(rotl32($A,5) + ($B ^ $C ^ $D) + $E + \1 + 0xca62c1d6) \& 0xffffffff}]} \
    ::sha1::SHA1Transform_body_tmp

regsub -all -line \
    {rotl32\(\$A,5\)} \
    $::sha1::SHA1Transform_body_tmp \
    {((($A << 5) \& 0xffffffff) | (($A >> 27) \& 0x1f))} \
    ::sha1::SHA1Transform_body_tmp

regsub -all -line \
    {\[rotl32 \$B 30\]} \
    $::sha1::SHA1Transform_body_tmp \
    {[expr {int(($B << 30) | (($B >> 2) \& 0x3fffffff))}]} \
    ::sha1::SHA1Transform_body_tmp
#
# Version 2 avoids a few truncations to 32 bits in non-essential places.
#
regsub -all -line \
    {\[F1 \$A \$B \$C \$D \$E (\[.*?\])\]} \
    $::sha1::SHA1Transform_body \
    {[expr {rotl32($A,5) + ($D ^ ($B \& ($C ^ $D))) + $E + \1 + 0x5a827999}]} \
    ::sha1::SHA1Transform_body_tmp2

regsub -all -line \
    {\[F2 \$A \$B \$C \$D \$E (\[.*?\])\]} \
    $::sha1::SHA1Transform_body_tmp2 \
    {[expr {rotl32($A,5) + ($B ^ $C ^ $D) + $E + \1 + 0x6ed9eba1}]} \
    ::sha1::SHA1Transform_body_tmp2

		}
regsub -all -line \
    {\[F3 \$A \$B \$C \$D \$E (\[.*?\])\]} \
    $::sha1::SHA1Transform_body_tmp2 \
    {[expr {rotl32($A,5) + (($B \& $C) | ($D \& ($B | $C))) + $E + \1 + 0x8f1bbcdc}]} \
    ::sha1::SHA1Transform_body_tmp2

		"-file" {
regsub -all -line \
    {\[F4 \$A \$B \$C \$D \$E (\[.*?\])\]} \
    $::sha1::SHA1Transform_body_tmp2 \
    {[expr {rotl32($A,5) + ($B ^ $C ^ $D) + $E + \1 + 0xca62c1d6}]} \
    ::sha1::SHA1Transform_body_tmp2

			set output [_sha1_file [lindex $args end]]
regsub -all -line \
    {rotl32\(\$A,5\)} \
    $::sha1::SHA1Transform_body_tmp2 \
    {(($A << 5) | (($A >> 27) \& 0x1f))} \
    ::sha1::SHA1Transform_body_tmp2

		}
regsub -all -line \
    {\[rotl32 \$B 30\]} \
    $::sha1::SHA1Transform_body_tmp2 \
    {[expr {($B << 30) | (($B >> 2) \& 0x3fffffff)}]} \
    ::sha1::SHA1Transform_body_tmp2

		"-string" {
if {[package vsatisfies [package provide Tcl] 8.5]} {
    proc ::sha1::SHA1Transform {token msg} $::sha1::SHA1Transform_body_tmp
} else {
    proc ::sha1::SHA1Transform {token msg} $::sha1::SHA1Transform_body_tmp2
}

unset ::sha1::SHA1Transform_body
unset ::sha1::SHA1Transform_body_tmp
unset ::sha1::SHA1Transform_body_tmp2

# -------------------------------------------------------------------------

proc ::sha1::byte {n v} {expr {((0xFF << (8 * $n)) & $v) >> (8 * $n)}}
proc ::sha1::bytes {v} { 
    #format %c%c%c%c [byte 0 $v] [byte 1 $v] [byte 2 $v] [byte 3 $v]
    format %c%c%c%c \
        [expr {((0xFF000000 & $v) >> 24) & 0xFF}] \
        [expr {(0xFF0000 & $v) >> 16}] \
        [expr {(0xFF00 & $v) >> 8}] \
        [expr {0xFF & $v}]
}

# -------------------------------------------------------------------------

proc ::sha1::Hex {data} {
    binary scan $data H* result
    return $result
}

# -------------------------------------------------------------------------

# Description:
#  Pop the nth element off a list. Used in options processing.
#
proc ::sha1::Pop {varname {nth 0}} {
    upvar $varname args
    set r [lindex $args $nth]
			set output [_sha1_string [lindex $args end]]
    set args [lreplace $args $nth $nth]
    return $r
}

# -------------------------------------------------------------------------

# fileevent handler for chunked file hashing.
#
proc ::sha1::Chunk {token channel {chunksize 4096}} {
    upvar #0 $token state
    
    if {[eof $channel]} {
        fileevent $channel readable {}
        set state(reading) 0
    }
		}
        
    SHA1Update $token [read $channel $chunksize]
}

# -------------------------------------------------------------------------

proc ::sha1::sha1 {args} {
    array set opts {-hex 0 -filename {} -channel {} -chunksize 4096}
    if {[llength $args] == 1} {
        set opts(-hex) 1
    } else {
        while {[string match -* [set option [lindex $args 0]]]} {
            switch -glob -- $option {
                -hex       { set opts(-hex) 1 }
                -bin       { set opts(-hex) 0 }
                -file*     { set opts(-filename) [Pop args 1] }
                -channel   { set opts(-channel) [Pop args 1] }
                -chunksize { set opts(-chunksize) [Pop args 1] }
                default {
		default {
                    if {[llength $args] == 1} { break }
                    if {[string compare $option "--"] == 0} { Pop args; break }
                    set err [join [lsort [concat -bin [array names opts]]] ", "]
                    return -code error "bad option $option:\
                    must be one of $err"
                }
            }
            Pop args
        }
    }

    if {$opts(-filename) != {}} {
        set opts(-channel) [open $opts(-filename) r]
        fconfigure $opts(-channel) -translation binary
    }

    if {$opts(-channel) == {}} {

        if {[llength $args] != 1} {
            return -code error "wrong # args:\
			return -code error "invalid mode: $mode, must be one of -channel or -file (or a plain string)"
                should be \"sha1 ?-hex? -filename file | string\""
        }
		}
        set tok [SHA1Init]
        SHA1Update $tok [lindex $args 0]
        set r [SHA1Final $tok]

	}
    } else {

        set tok [SHA1Init]
        # FRINK: nocheck
        set [subst $tok](reading) 1
        fileevent $opts(-channel) readable \
            [list [namespace origin Chunk] \
                 $tok $opts(-channel) $opts(-chunksize)]
        # FRINK: nocheck
        vwait [subst $tok](reading)
        set r [SHA1Final $tok]

        # If we opened the channel - we should close it too.
        if {$opts(-filename) != {}} {
            close $opts(-channel)
        }
    }
    
    if {$opts(-hex)} {
        set r [Hex $r]
    }
    return $r
}

# -------------------------------------------------------------------------

proc ::sha1::hmac {args} {
    array set opts {-hex 1 -filename {} -channel {} -chunksize 4096}
    if {[llength $args] != 2} {
        while {[string match -* [set option [lindex $args 0]]]} {
            switch -glob -- $option {
                -key       { set opts(-key) [Pop args 1] }
                -hex       { set opts(-hex) 1 }
                -bin       { set opts(-hex) 0 }
                -file*     { set opts(-filename) [Pop args 1] }
                -channel   { set opts(-channel) [Pop args 1] }
                -chunksize { set opts(-chunksize) [Pop args 1] }
                default {
                    if {[llength $args] == 1} { break }
                    if {[string compare $option "--"] == 0} { Pop args; break }
                    set err [join [lsort [array names opts]] ", "]
                    return -code error "bad option $option:\
                    must be one of $err"
                }

            }
            Pop args
        }
    }

	if {$outputmode == "hex"} {
    if {[llength $args] == 2} {
        set opts(-key) [Pop args]
    }

		binary scan $output H* output
    if {![info exists opts(-key)]} {
        return -code error "wrong # args:\
            should be \"hmac ?-hex? -key key -filename file | string\""
    }
	}

    if {$opts(-filename) != {}} {
        set opts(-channel) [open $opts(-filename) r]
        fconfigure $opts(-channel) -translation binary
    }

    if {$opts(-channel) == {}} {

        if {[llength $args] != 1} {
            return -code error "wrong # args:\
                should be \"hmac ?-hex? -key key -filename file | string\""
        }
        set tok [HMACInit $opts(-key)]
        HMACUpdate $tok [lindex $args 0]
        set r [HMACFinal $tok]

    } else {

        set tok [HMACInit $opts(-key)]
        # FRINK: nocheck
        set [subst $tok](reading) 1
        fileevent $opts(-channel) readable \
            [list [namespace origin Chunk] \
                 $tok $opts(-channel) $opts(-chunksize)]
        # FRINK: nocheck
        vwait [subst $tok](reading)
        set r [HMACFinal $tok]

        # If we opened the channel - we should close it too.
        if {$opts(-filename) != {}} {
            close $opts(-channel)
        }
    }
    
    if {$opts(-hex)} {
        set r [Hex $r]
    }
    return $r
	return $output
}

# -------------------------------------------------------------------------

package provide sha1 $::sha1::version

# -------------------------------------------------------------------------
# Local Variables:
#   mode: tcl
#   indent-tabs-mode: nil
# End: