dc3c8261 |
1 | #error "This file is no longer part of PuTTY, it will not compile." |
8f203108 |
2 | #define _WIN32_WINNT 0x0400 |
3 | #include <windows.h> |
4 | #include <stdio.h> |
5 | #include <stdlib.h> |
6 | #include <wincrypt.h> |
7 | #include "ssh.h" |
8 | |
9 | void fatalbox(char *fmt, ...); |
10 | |
11 | static HCRYPTKEY create_des_key(unsigned char *key); |
12 | |
13 | |
14 | HCRYPTPROV hCryptProv; |
32874aea |
15 | HCRYPTKEY hDESKey[2][3] = { {0, 0, 0}, {0, 0, 0} }; /* global for now */ |
8f203108 |
16 | |
17 | |
18 | /* use Microsoft Enhanced Cryptographic Service Provider */ |
19 | #define CSP MS_ENHANCED_PROV |
20 | |
21 | |
32874aea |
22 | static BYTE PrivateKeyWithExponentOfOne[] = { |
8f203108 |
23 | 0x07, 0x02, 0x00, 0x00, 0x00, 0xA4, 0x00, 0x00, |
24 | 0x52, 0x53, 0x41, 0x32, 0x00, 0x02, 0x00, 0x00, |
25 | 0x01, 0x00, 0x00, 0x00, 0xAB, 0xEF, 0xFA, 0xC6, |
26 | 0x7D, 0xE8, 0xDE, 0xFB, 0x68, 0x38, 0x09, 0x92, |
27 | 0xD9, 0x42, 0x7E, 0x6B, 0x89, 0x9E, 0x21, 0xD7, |
28 | 0x52, 0x1C, 0x99, 0x3C, 0x17, 0x48, 0x4E, 0x3A, |
29 | 0x44, 0x02, 0xF2, 0xFA, 0x74, 0x57, 0xDA, 0xE4, |
30 | 0xD3, 0xC0, 0x35, 0x67, 0xFA, 0x6E, 0xDF, 0x78, |
31 | 0x4C, 0x75, 0x35, 0x1C, 0xA0, 0x74, 0x49, 0xE3, |
32 | 0x20, 0x13, 0x71, 0x35, 0x65, 0xDF, 0x12, 0x20, |
33 | 0xF5, 0xF5, 0xF5, 0xC1, 0xED, 0x5C, 0x91, 0x36, |
34 | 0x75, 0xB0, 0xA9, 0x9C, 0x04, 0xDB, 0x0C, 0x8C, |
35 | 0xBF, 0x99, 0x75, 0x13, 0x7E, 0x87, 0x80, 0x4B, |
36 | 0x71, 0x94, 0xB8, 0x00, 0xA0, 0x7D, 0xB7, 0x53, |
37 | 0xDD, 0x20, 0x63, 0xEE, 0xF7, 0x83, 0x41, 0xFE, |
38 | 0x16, 0xA7, 0x6E, 0xDF, 0x21, 0x7D, 0x76, 0xC0, |
39 | 0x85, 0xD5, 0x65, 0x7F, 0x00, 0x23, 0x57, 0x45, |
40 | 0x52, 0x02, 0x9D, 0xEA, 0x69, 0xAC, 0x1F, 0xFD, |
41 | 0x3F, 0x8C, 0x4A, 0xD0, |
42 | |
43 | 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
44 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
45 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
46 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
47 | |
48 | 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
49 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
50 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
51 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
52 | |
53 | 0x64, 0xD5, 0xAA, 0xB1, |
54 | 0xA6, 0x03, 0x18, 0x92, 0x03, 0xAA, 0x31, 0x2E, |
55 | 0x48, 0x4B, 0x65, 0x20, 0x99, 0xCD, 0xC6, 0x0C, |
56 | 0x15, 0x0C, 0xBF, 0x3E, 0xFF, 0x78, 0x95, 0x67, |
57 | 0xB1, 0x74, 0x5B, 0x60, |
58 | |
59 | 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
60 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
61 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
62 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
63 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
64 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
65 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
66 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
67 | }; |
68 | |
69 | |
70 | |
71 | /* ---------------------------------------------------------* |
72 | * Utility functions * |
73 | * ---------------------------------------------------------*/ |
74 | |
75 | |
32874aea |
76 | int crypto_startup() |
77 | { |
78 | if (CryptAcquireContext(&hCryptProv, "Putty", CSP, PROV_RSA_FULL, |
79 | CRYPT_NEWKEYSET) == 0) { |
80 | if (GetLastError() == NTE_EXISTS) { |
81 | if (CryptAcquireContext(&hCryptProv, "Putty", CSP, |
82 | PROV_RSA_FULL, 0) == 0) { |
83 | return FALSE; /* failed to acquire context - probably |
84 | * don't have high encryption installed! */ |
8f203108 |
85 | } |
86 | } else |
32874aea |
87 | return FALSE; /* failed to acquire context - probably |
88 | * don't have high encryption installed! */ |
8f203108 |
89 | } |
90 | return TRUE; |
91 | } |
92 | |
93 | |
32874aea |
94 | void crypto_wrapup() |
95 | { |
8f203108 |
96 | int i, j; |
32874aea |
97 | for (i = 0; i < 2; i++) { |
98 | for (j = 0; j < 3; j++) { |
99 | if (hDESKey[i][j]) |
8f203108 |
100 | CryptDestroyKey(hDESKey[i][j]); |
101 | hDESKey[i][j] = 0; |
102 | } |
103 | } |
32874aea |
104 | if (hCryptProv) |
8f203108 |
105 | CryptReleaseContext(hCryptProv, 0); |
106 | hCryptProv = 0; |
107 | } |
108 | |
109 | |
110 | /* ---------------------------------------------------------* |
111 | * Random number functions * |
112 | * ---------------------------------------------------------*/ |
113 | |
32874aea |
114 | int random_byte(void) |
115 | { |
8f203108 |
116 | unsigned char b; |
32874aea |
117 | if (!CryptGenRandom(hCryptProv, 1, &b)) |
8f203108 |
118 | fatalbox("random number generator failure!"); |
119 | return b; |
120 | } |
121 | |
32874aea |
122 | void random_add_noise(void *noise, int length) |
123 | { |
8f203108 |
124 | /* do nothing */ |
125 | } |
32874aea |
126 | void random_init(void) |
127 | { |
8f203108 |
128 | /* do nothing */ |
129 | } |
32874aea |
130 | void random_get_savedata(void **data, int *len) |
131 | { |
8f203108 |
132 | /* do nothing */ |
133 | } |
32874aea |
134 | void noise_get_heavy(void (*func) (void *, int)) |
135 | { |
8f203108 |
136 | /* do nothing */ |
137 | } |
32874aea |
138 | void noise_get_light(void (*func) (void *, int)) |
139 | { |
8f203108 |
140 | /* do nothing */ |
141 | } |
32874aea |
142 | void noise_ultralight(DWORD data) |
143 | { |
8f203108 |
144 | /* do nothing */ |
145 | } |
32874aea |
146 | void random_save_seed(void) |
147 | { |
8f203108 |
148 | /* do nothing */ |
149 | } |
150 | |
151 | |
152 | /* ---------------------------------------------------------* |
153 | * MD5 hash functions * |
154 | * ---------------------------------------------------------*/ |
155 | |
156 | |
32874aea |
157 | void MD5Init(struct MD5Context *ctx) |
158 | { |
159 | if (!CryptCreateHash(hCryptProv, CALG_MD5, 0, 0, &ctx->hHash)) |
8f203108 |
160 | fatalbox("Error during CryptBeginHash!\n"); |
161 | } |
162 | |
163 | |
164 | void MD5Update(struct MD5Context *ctx, |
32874aea |
165 | unsigned char const *buf, unsigned len) |
166 | { |
167 | if (CryptHashData(ctx->hHash, buf, len, 0) == 0) |
8f203108 |
168 | fatalbox("Error during CryptHashSessionKey!\n"); |
169 | } |
170 | |
171 | |
32874aea |
172 | void MD5Final(unsigned char digest[16], struct MD5Context *ctx) |
173 | { |
8f203108 |
174 | DWORD cb = 16; |
32874aea |
175 | if (CryptGetHashParam(ctx->hHash, HP_HASHVAL, digest, &cb, 0) == 0) |
8f203108 |
176 | fatalbox("Error during CryptGetHashParam!\n"); |
32874aea |
177 | if (ctx->hHash) |
8f203108 |
178 | CryptDestroyHash(ctx->hHash); |
179 | ctx->hHash = 0; |
180 | } |
181 | |
182 | |
183 | /* ---------------------------------------------------------* |
184 | * RSA public key functions * |
185 | * ---------------------------------------------------------*/ |
186 | |
187 | int makekey(unsigned char *data, struct RSAKey *result, |
32874aea |
188 | unsigned char **keystr) |
189 | { |
8f203108 |
190 | |
191 | unsigned char *p = data; |
192 | int i; |
193 | int w, b; |
194 | |
195 | /* get size (bits) of modulus */ |
196 | result->bits = 0; |
32874aea |
197 | for (i = 0; i < 4; i++) |
8f203108 |
198 | result->bits = (result->bits << 8) + *p++; |
199 | |
200 | /* get size (bits) of public exponent */ |
201 | w = 0; |
32874aea |
202 | for (i = 0; i < 2; i++) |
8f203108 |
203 | w = (w << 8) + *p++; |
32874aea |
204 | b = (w + 7) / 8; /* bits -> bytes */ |
8f203108 |
205 | |
206 | /* convert exponent to DWORD */ |
207 | result->exponent = 0; |
32874aea |
208 | for (i = 0; i < b; i++) |
8f203108 |
209 | result->exponent = (result->exponent << 8) + *p++; |
210 | |
211 | /* get size (bits) of modulus */ |
212 | w = 0; |
32874aea |
213 | for (i = 0; i < 2; i++) |
8f203108 |
214 | w = (w << 8) + *p++; |
32874aea |
215 | result->bytes = b = (w + 7) / 8; /* bits -> bytes */ |
8f203108 |
216 | |
217 | /* allocate buffer for modulus & copy it */ |
218 | result->modulus = malloc(b); |
219 | memcpy(result->modulus, p, b); |
220 | |
221 | /* update callers pointer */ |
32874aea |
222 | if (keystr) |
223 | *keystr = p; /* point at key string, second time */ |
8f203108 |
224 | |
225 | return (p - data) + b; |
226 | } |
227 | |
228 | |
32874aea |
229 | void rsaencrypt(unsigned char *data, int length, struct RSAKey *rsakey) |
230 | { |
8f203108 |
231 | |
232 | int i; |
233 | unsigned char *pKeybuf, *pKeyin; |
234 | HCRYPTKEY hRsaKey; |
235 | PUBLICKEYSTRUC *pBlob; |
236 | RSAPUBKEY *pRPK; |
237 | unsigned char *buf; |
238 | DWORD dlen; |
239 | DWORD bufsize; |
240 | |
241 | /* allocate buffer for public key blob */ |
32874aea |
242 | if ((pBlob = malloc(sizeof(PUBLICKEYSTRUC) + sizeof(RSAPUBKEY) + |
243 | rsakey->bytes)) == NULL) |
8f203108 |
244 | fatalbox("Out of memory"); |
245 | |
246 | /* allocate buffer for message encryption block */ |
247 | bufsize = (length + rsakey->bytes) << 1; |
32874aea |
248 | if ((buf = malloc(bufsize)) == NULL) |
8f203108 |
249 | fatalbox("Out of memory"); |
250 | |
251 | /* construct public key blob from host public key */ |
32874aea |
252 | pKeybuf = ((unsigned char *) pBlob) + sizeof(PUBLICKEYSTRUC) + |
8f203108 |
253 | sizeof(RSAPUBKEY); |
32874aea |
254 | pKeyin = ((unsigned char *) rsakey->modulus); |
8f203108 |
255 | /* change big endian to little endian */ |
32874aea |
256 | for (i = 0; i < rsakey->bytes; i++) |
257 | pKeybuf[i] = pKeyin[rsakey->bytes - i - 1]; |
8f203108 |
258 | pBlob->bType = PUBLICKEYBLOB; |
259 | pBlob->bVersion = 0x02; |
260 | pBlob->reserved = 0; |
261 | pBlob->aiKeyAlg = CALG_RSA_KEYX; |
32874aea |
262 | pRPK = |
263 | (RSAPUBKEY *) (((unsigned char *) pBlob) + sizeof(PUBLICKEYSTRUC)); |
264 | pRPK->magic = 0x31415352; /* "RSA1" */ |
8f203108 |
265 | pRPK->bitlen = rsakey->bits; |
266 | pRPK->pubexp = rsakey->exponent; |
267 | |
268 | /* import public key blob into key container */ |
32874aea |
269 | if (CryptImportKey(hCryptProv, (void *) pBlob, |
270 | sizeof(PUBLICKEYSTRUC) + sizeof(RSAPUBKEY) + |
271 | rsakey->bytes, 0, 0, &hRsaKey) == 0) |
8f203108 |
272 | fatalbox("Error importing RSA key!"); |
273 | |
274 | /* copy message into buffer */ |
275 | memcpy(buf, data, length); |
276 | dlen = length; |
277 | |
278 | /* using host public key, encrypt the message */ |
32874aea |
279 | if (CryptEncrypt(hRsaKey, 0, TRUE, 0, buf, &dlen, bufsize) == 0) |
8f203108 |
280 | fatalbox("Error encrypting using RSA key!"); |
281 | |
282 | /* |
283 | * For some strange reason, Microsoft CryptEncrypt using public |
284 | * key, returns the cyphertext in backwards (little endian) |
285 | * order, so reverse it! |
286 | */ |
32874aea |
287 | for (i = 0; i < (int) dlen; i++) |
288 | data[i] = buf[dlen - i - 1]; /* make it big endian */ |
8f203108 |
289 | |
290 | CryptDestroyKey(hRsaKey); |
291 | free(buf); |
292 | free(pBlob); |
293 | |
294 | } |
295 | |
296 | |
32874aea |
297 | int rsastr_len(struct RSAKey *key) |
298 | { |
8f203108 |
299 | return 2 * (sizeof(DWORD) + key->bytes) + 10; |
300 | } |
301 | |
302 | |
32874aea |
303 | void rsastr_fmt(char *str, struct RSAKey *key) |
304 | { |
8f203108 |
305 | |
306 | int len = 0, i; |
307 | |
32874aea |
308 | sprintf(str + len, "%04x", key->exponent); |
309 | len += strlen(str + len); |
8f203108 |
310 | |
311 | str[len++] = '/'; |
32874aea |
312 | for (i = 1; i < key->bytes; i++) { |
313 | sprintf(str + len, "%02x", key->modulus[i]); |
314 | len += strlen(str + len); |
8f203108 |
315 | } |
316 | str[len] = '\0'; |
317 | } |
318 | |
319 | |
320 | |
321 | /* ---------------------------------------------------------* |
322 | * DES encryption / decryption functions * |
323 | * ---------------------------------------------------------*/ |
324 | |
325 | |
32874aea |
326 | void des3_sesskey(unsigned char *key) |
327 | { |
8f203108 |
328 | int i, j; |
32874aea |
329 | for (i = 0; i < 2; i++) { |
330 | for (j = 0; j < 3; j++) { |
8f203108 |
331 | hDESKey[i][j] = create_des_key(key + (j * 8)); |
332 | } |
333 | } |
334 | } |
335 | |
336 | |
32874aea |
337 | void des3_encrypt_blk(unsigned char *blk, int len) |
338 | { |
8f203108 |
339 | |
340 | DWORD dlen; |
341 | dlen = len; |
342 | |
32874aea |
343 | if (CryptEncrypt(hDESKey[0][0], 0, FALSE, 0, blk, &dlen, len + 8) == 0) |
8f203108 |
344 | fatalbox("Error encrypting block!\n"); |
32874aea |
345 | if (CryptDecrypt(hDESKey[0][1], 0, FALSE, 0, blk, &dlen) == 0) |
8f203108 |
346 | fatalbox("Error encrypting block!\n"); |
32874aea |
347 | if (CryptEncrypt(hDESKey[0][2], 0, FALSE, 0, blk, &dlen, len + 8) == 0) |
8f203108 |
348 | fatalbox("Error encrypting block!\n"); |
349 | } |
350 | |
351 | |
32874aea |
352 | void des3_decrypt_blk(unsigned char *blk, int len) |
353 | { |
8f203108 |
354 | DWORD dlen; |
355 | dlen = len; |
356 | |
32874aea |
357 | if (CryptDecrypt(hDESKey[1][2], 0, FALSE, 0, blk, &dlen) == 0) |
8f203108 |
358 | fatalbox("Error decrypting block!\n"); |
32874aea |
359 | if (CryptEncrypt(hDESKey[1][1], 0, FALSE, 0, blk, &dlen, len + 8) == 0) |
8f203108 |
360 | fatalbox("Error decrypting block!\n"); |
32874aea |
361 | if (CryptDecrypt(hDESKey[1][0], 0, FALSE, 0, blk, &dlen) == 0) |
8f203108 |
362 | fatalbox("Error decrypting block!\n"); |
363 | } |
364 | |
365 | |
366 | struct ssh_cipher ssh_3des = { |
367 | des3_sesskey, |
368 | des3_encrypt_blk, |
369 | des3_decrypt_blk |
370 | }; |
371 | |
372 | |
32874aea |
373 | void des_sesskey(unsigned char *key) |
374 | { |
8f203108 |
375 | int i; |
32874aea |
376 | for (i = 0; i < 2; i++) { |
8f203108 |
377 | hDESKey[i][0] = create_des_key(key); |
378 | } |
379 | } |
380 | |
381 | |
32874aea |
382 | void des_encrypt_blk(unsigned char *blk, int len) |
383 | { |
8f203108 |
384 | DWORD dlen; |
385 | dlen = len; |
32874aea |
386 | if (CryptEncrypt(hDESKey[0][0], 0, FALSE, 0, blk, &dlen, len + 8) == 0) |
8f203108 |
387 | fatalbox("Error encrypting block!\n"); |
388 | } |
389 | |
390 | |
32874aea |
391 | void des_decrypt_blk(unsigned char *blk, int len) |
392 | { |
8f203108 |
393 | DWORD dlen; |
394 | dlen = len; |
32874aea |
395 | if (CryptDecrypt(hDESKey[1][0], 0, FALSE, 0, blk, &dlen) == 0) |
8f203108 |
396 | fatalbox("Error decrypting block!\n"); |
397 | } |
398 | |
399 | struct ssh_cipher ssh_des = { |
400 | des_sesskey, |
401 | des_encrypt_blk, |
402 | des_decrypt_blk |
403 | }; |
404 | |
405 | |
32874aea |
406 | static HCRYPTKEY create_des_key(unsigned char *key) |
407 | { |
8f203108 |
408 | |
409 | HCRYPTKEY hSessionKey, hPrivateKey; |
410 | DWORD dlen = 8; |
411 | BLOBHEADER *pbh; |
412 | char buf[sizeof(BLOBHEADER) + sizeof(ALG_ID) + 256]; |
413 | |
414 | /* |
415 | * Need special private key to encrypt session key so we can |
416 | * import session key, since only encrypted session keys can be |
417 | * imported |
418 | */ |
32874aea |
419 | if (CryptImportKey(hCryptProv, PrivateKeyWithExponentOfOne, |
420 | sizeof(PrivateKeyWithExponentOfOne), |
421 | 0, 0, &hPrivateKey) == 0) |
8f203108 |
422 | return 0; |
423 | |
424 | /* now encrypt session key using special private key */ |
425 | memcpy(buf + sizeof(BLOBHEADER) + sizeof(ALG_ID), key, 8); |
32874aea |
426 | if (CryptEncrypt(hPrivateKey, 0, TRUE, 0, |
427 | buf + sizeof(BLOBHEADER) + sizeof(ALG_ID), |
428 | &dlen, 256) == 0) |
8f203108 |
429 | return 0; |
430 | |
431 | /* build session key blob */ |
32874aea |
432 | pbh = (BLOBHEADER *) buf; |
8f203108 |
433 | pbh->bType = SIMPLEBLOB; |
434 | pbh->bVersion = 0x02; |
435 | pbh->reserved = 0; |
436 | pbh->aiKeyAlg = CALG_DES; |
32874aea |
437 | *((ALG_ID *) (buf + sizeof(BLOBHEADER))) = CALG_RSA_KEYX; |
8f203108 |
438 | |
439 | /* import session key into key container */ |
32874aea |
440 | if (CryptImportKey(hCryptProv, buf, |
441 | dlen + sizeof(BLOBHEADER) + sizeof(ALG_ID), |
442 | hPrivateKey, 0, &hSessionKey) == 0) |
8f203108 |
443 | return 0; |
444 | |
32874aea |
445 | if (hPrivateKey) |
8f203108 |
446 | CryptDestroyKey(hPrivateKey); |
447 | |
448 | return hSessionKey; |
449 | |
450 | } |