df3c4460 |
1 | #include <stdio.h> |
37508af4 |
2 | #include <string.h> |
3 | |
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4 | #include "puttymem.h" |
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5 | #include "network.h" |
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6 | #include "int64.h" |
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7 | #include "misc.h" |
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8 | |
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9 | struct ssh_channel; |
10 | |
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11 | extern void sshfwd_close(struct ssh_channel *c); |
12 | extern int sshfwd_write(struct ssh_channel *c, char *, int); |
13 | extern void sshfwd_unthrottle(struct ssh_channel *c, int bufsize); |
14 | |
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15 | /* |
16 | * Useful thing. |
17 | */ |
18 | #ifndef lenof |
19 | #define lenof(x) ( (sizeof((x))) / (sizeof(*(x)))) |
20 | #endif |
21 | |
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22 | #define SSH_CIPHER_IDEA 1 |
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23 | #define SSH_CIPHER_DES 2 |
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24 | #define SSH_CIPHER_3DES 3 |
25 | #define SSH_CIPHER_BLOWFISH 6 |
26 | |
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27 | #ifdef MSCRYPTOAPI |
28 | #define APIEXTRA 8 |
29 | #else |
30 | #define APIEXTRA 0 |
31 | #endif |
32 | |
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33 | #ifndef BIGNUM_INTERNAL |
34 | typedef void *Bignum; |
35 | #endif |
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36 | |
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37 | struct RSAKey { |
38 | int bits; |
39 | int bytes; |
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40 | #ifdef MSCRYPTOAPI |
41 | unsigned long exponent; |
42 | unsigned char *modulus; |
43 | #else |
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44 | Bignum modulus; |
45 | Bignum exponent; |
46 | Bignum private_exponent; |
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47 | Bignum p; |
48 | Bignum q; |
49 | Bignum iqmp; |
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50 | #endif |
51 | char *comment; |
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52 | }; |
53 | |
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54 | struct dss_key { |
55 | Bignum p, q, g, y, x; |
56 | }; |
57 | |
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58 | int makekey(unsigned char *data, struct RSAKey *result, |
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59 | unsigned char **keystr, int order); |
60 | int makeprivate(unsigned char *data, struct RSAKey *result); |
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61 | void rsaencrypt(unsigned char *data, int length, struct RSAKey *key); |
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62 | Bignum rsadecrypt(Bignum input, struct RSAKey *key); |
63 | void rsasign(unsigned char *data, int length, struct RSAKey *key); |
64 | void rsasanitise(struct RSAKey *key); |
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65 | int rsastr_len(struct RSAKey *key); |
66 | void rsastr_fmt(char *str, struct RSAKey *key); |
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67 | void rsa_fingerprint(char *str, int len, struct RSAKey *key); |
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68 | int rsa_verify(struct RSAKey *key); |
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69 | unsigned char *rsa_public_blob(struct RSAKey *key, int *len); |
70 | int rsa_public_blob_len(void *data); |
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71 | void freersakey(struct RSAKey *key); |
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72 | |
73 | typedef unsigned int word32; |
74 | typedef unsigned int uint32; |
75 | |
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76 | unsigned long crc32(const void *s, size_t len); |
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77 | unsigned long crc32_update(unsigned long crc_input, const void *s, size_t len); |
78 | |
79 | /* SSH CRC compensation attack detector */ |
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80 | void *crcda_make_context(void); |
81 | void crcda_free_context(void *handle); |
82 | int detect_attack(void *handle, unsigned char *buf, uint32 len, |
83 | unsigned char *IV); |
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84 | |
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85 | typedef struct { |
86 | uint32 h[4]; |
87 | } MD5_Core_State; |
88 | |
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89 | struct MD5Context { |
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90 | #ifdef MSCRYPTOAPI |
91 | unsigned long hHash; |
92 | #else |
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93 | MD5_Core_State core; |
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94 | unsigned char block[64]; |
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95 | int blkused; |
96 | uint32 lenhi, lenlo; |
8f203108 |
97 | #endif |
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98 | }; |
99 | |
100 | void MD5Init(struct MD5Context *context); |
101 | void MD5Update(struct MD5Context *context, unsigned char const *buf, |
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102 | unsigned len); |
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103 | void MD5Final(unsigned char digest[16], struct MD5Context *context); |
104 | |
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105 | typedef struct { |
106 | uint32 h[5]; |
107 | unsigned char block[64]; |
108 | int blkused; |
109 | uint32 lenhi, lenlo; |
110 | } SHA_State; |
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111 | void SHA_Init(SHA_State * s); |
112 | void SHA_Bytes(SHA_State * s, void *p, int len); |
113 | void SHA_Final(SHA_State * s, unsigned char *output); |
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114 | void SHA_Simple(void *p, int len, unsigned char *output); |
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115 | |
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116 | void hmac_sha1_simple(void *key, int keylen, void *data, int datalen, |
117 | unsigned char *output); |
118 | |
119 | typedef struct { |
120 | uint64 h[8]; |
121 | unsigned char block[128]; |
122 | int blkused; |
123 | uint32 len[4]; |
124 | } SHA512_State; |
125 | void SHA512_Init(SHA512_State * s); |
126 | void SHA512_Bytes(SHA512_State * s, const void *p, int len); |
127 | void SHA512_Final(SHA512_State * s, unsigned char *output); |
128 | void SHA512_Simple(const void *p, int len, unsigned char *output); |
129 | |
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130 | struct ssh_cipher { |
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131 | void *(*make_context)(void); |
132 | void (*free_context)(void *); |
133 | void (*sesskey) (void *, unsigned char *key); /* for ssh 1 */ |
134 | void (*encrypt) (void *, unsigned char *blk, int len); |
135 | void (*decrypt) (void *, unsigned char *blk, int len); |
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136 | int blksize; |
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137 | char *text_name; |
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138 | }; |
139 | |
140 | struct ssh2_cipher { |
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141 | void *(*make_context)(void); |
142 | void (*free_context)(void *); |
143 | void (*setiv) (void *, unsigned char *key); /* for ssh 2 */ |
144 | void (*setkey) (void *, unsigned char *key);/* for ssh 2 */ |
145 | void (*encrypt) (void *, unsigned char *blk, int len); |
146 | void (*decrypt) (void *, unsigned char *blk, int len); |
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147 | char *name; |
148 | int blksize; |
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149 | int keylen; |
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150 | char *text_name; |
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151 | }; |
152 | |
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153 | struct ssh2_ciphers { |
154 | int nciphers; |
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155 | const struct ssh2_cipher *const *list; |
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156 | }; |
157 | |
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158 | struct ssh_mac { |
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159 | void *(*make_context)(void); |
160 | void (*free_context)(void *); |
161 | void (*setkey) (void *, unsigned char *key); |
162 | void (*generate) (void *, unsigned char *blk, int len, unsigned long seq); |
163 | int (*verify) (void *, unsigned char *blk, int len, unsigned long seq); |
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164 | char *name; |
165 | int len; |
166 | }; |
167 | |
168 | struct ssh_kex { |
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169 | /* |
170 | * Plugging in another KEX algorithm requires structural chaos, |
171 | * so it's hard to abstract them into nice little structures |
172 | * like this. Hence, for the moment, this is just a |
173 | * placeholder. I claim justification in the fact that OpenSSH |
174 | * does this too :-) |
175 | */ |
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176 | char *name; |
177 | }; |
178 | |
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179 | struct ssh_signkey { |
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180 | void *(*newkey) (char *data, int len); |
181 | void (*freekey) (void *key); |
182 | char *(*fmtkey) (void *key); |
183 | unsigned char *(*public_blob) (void *key, int *len); |
184 | unsigned char *(*private_blob) (void *key, int *len); |
185 | void *(*createkey) (unsigned char *pub_blob, int pub_len, |
186 | unsigned char *priv_blob, int priv_len); |
187 | void *(*openssh_createkey) (unsigned char **blob, int *len); |
188 | int (*openssh_fmtkey) (void *key, unsigned char *blob, int len); |
189 | char *(*fingerprint) (void *key); |
190 | int (*verifysig) (void *key, char *sig, int siglen, |
191 | char *data, int datalen); |
192 | unsigned char *(*sign) (void *key, char *data, int datalen, |
193 | int *siglen); |
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194 | char *name; |
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195 | char *keytype; /* for host key cache */ |
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196 | }; |
197 | |
198 | struct ssh_compress { |
199 | char *name; |
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200 | void *(*compress_init) (void); |
201 | void (*compress_cleanup) (void *); |
202 | int (*compress) (void *, unsigned char *block, int len, |
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203 | unsigned char **outblock, int *outlen); |
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204 | void *(*decompress_init) (void); |
205 | void (*decompress_cleanup) (void *); |
206 | int (*decompress) (void *, unsigned char *block, int len, |
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207 | unsigned char **outblock, int *outlen); |
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208 | int (*disable_compression) (void *); |
209 | char *text_name; |
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210 | }; |
211 | |
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212 | struct ssh2_userkey { |
213 | const struct ssh_signkey *alg; /* the key algorithm */ |
214 | void *data; /* the key data */ |
215 | char *comment; /* the key comment */ |
216 | }; |
217 | |
218 | extern const struct ssh_cipher ssh_3des; |
219 | extern const struct ssh_cipher ssh_des; |
220 | extern const struct ssh_cipher ssh_blowfish_ssh1; |
221 | extern const struct ssh2_ciphers ssh2_3des; |
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222 | extern const struct ssh2_ciphers ssh2_des; |
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223 | extern const struct ssh2_ciphers ssh2_aes; |
224 | extern const struct ssh2_ciphers ssh2_blowfish; |
225 | extern const struct ssh_kex ssh_diffiehellman; |
226 | extern const struct ssh_kex ssh_diffiehellman_gex; |
227 | extern const struct ssh_signkey ssh_dss; |
228 | extern const struct ssh_signkey ssh_rsa; |
229 | extern const struct ssh_mac ssh_md5; |
230 | extern const struct ssh_mac ssh_sha1; |
231 | extern const struct ssh_mac ssh_sha1_buggy; |
232 | |
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233 | /* |
234 | * PuTTY version number formatted as an SSH version string. |
235 | */ |
236 | extern char sshver[]; |
237 | |
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238 | /* |
239 | * Gross hack: pscp will try to start SFTP but fall back to scp1 if |
240 | * that fails. This variable is the means by which scp.c can reach |
241 | * into the SSH code and find out which one it got. |
242 | */ |
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243 | extern int ssh_fallback_cmd(void *handle); |
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244 | |
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245 | #ifndef MSCRYPTOAPI |
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246 | void SHATransform(word32 * digest, word32 * data); |
8f203108 |
247 | #endif |
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248 | |
249 | int random_byte(void); |
250 | void random_add_noise(void *noise, int length); |
6e522441 |
251 | void random_add_heavynoise(void *noise, int length); |
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252 | |
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253 | void logevent(void *, const char *); |
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254 | |
255 | /* Allocate and register a new channel for port forwarding */ |
256 | void *new_sock_channel(void *handle, Socket s); |
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257 | void ssh_send_port_open(void *channel, char *hostname, int port, char *org); |
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258 | |
322d09a8 |
259 | /* Exports from portfwd.c */ |
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260 | extern const char *pfd_newconnect(Socket * s, char *hostname, int port, |
261 | void *c, const Config *cfg); |
820ebe3b |
262 | /* desthost == NULL indicates dynamic (SOCKS) port forwarding */ |
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263 | extern const char *pfd_addforward(char *desthost, int destport, char *srcaddr, |
264 | int port, void *backhandle, |
265 | const Config *cfg); |
322d09a8 |
266 | extern void pfd_close(Socket s); |
267 | extern int pfd_send(Socket s, char *data, int len); |
268 | extern void pfd_confirm(Socket s); |
269 | extern void pfd_unthrottle(Socket s); |
270 | extern void pfd_override_throttle(Socket s, int enable); |
271 | |
272 | /* Exports from x11fwd.c */ |
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273 | extern const char *x11_init(Socket *, char *, void *, void *, const char *, |
274 | int, const Config *); |
322d09a8 |
275 | extern void x11_close(Socket); |
276 | extern int x11_send(Socket, char *, int); |
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277 | extern void *x11_invent_auth(char *, int, char *, int, int); |
fabd1805 |
278 | extern void x11_free_auth(void *); |
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279 | extern void x11_unthrottle(Socket s); |
280 | extern void x11_override_throttle(Socket s, int enable); |
281 | extern int x11_get_screen_number(char *display); |
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282 | void x11_get_real_auth(void *authv, char *display); |
322d09a8 |
283 | |
9bee6826 |
284 | /* Platfdorm-dependent X11 function */ |
285 | extern void platform_get_x11_auth(char *display, int *proto, |
286 | unsigned char *data, int *datalen); |
287 | |
7cca0d81 |
288 | Bignum copybn(Bignum b); |
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289 | Bignum bn_power_2(int n); |
290 | void bn_restore_invariant(Bignum b); |
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291 | Bignum bignum_from_long(unsigned long n); |
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292 | void freebn(Bignum b); |
59600f67 |
293 | Bignum modpow(Bignum base, Bignum exp, Bignum mod); |
294 | Bignum modmul(Bignum a, Bignum b, Bignum mod); |
7cca0d81 |
295 | void decbn(Bignum n); |
296 | extern Bignum Zero, One; |
27cd7fc2 |
297 | Bignum bignum_from_bytes(const unsigned char *data, int nbytes); |
298 | int ssh1_read_bignum(const unsigned char *data, Bignum * result); |
ddecd643 |
299 | int bignum_bitcount(Bignum bn); |
5c58ad2d |
300 | int ssh1_bignum_length(Bignum bn); |
260f3dec |
301 | int ssh2_bignum_length(Bignum bn); |
5c58ad2d |
302 | int bignum_byte(Bignum bn, int i); |
9400cf6f |
303 | int bignum_bit(Bignum bn, int i); |
304 | void bignum_set_bit(Bignum bn, int i, int value); |
5c58ad2d |
305 | int ssh1_write_bignum(void *data, Bignum bn); |
9400cf6f |
306 | Bignum biggcd(Bignum a, Bignum b); |
307 | unsigned short bignum_mod_short(Bignum number, unsigned short modulus); |
308 | Bignum bignum_add_long(Bignum number, unsigned long addend); |
309 | Bignum bigmul(Bignum a, Bignum b); |
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310 | Bignum bigmuladd(Bignum a, Bignum b, Bignum addend); |
311 | Bignum bigdiv(Bignum a, Bignum b); |
312 | Bignum bigmod(Bignum a, Bignum b); |
9400cf6f |
313 | Bignum modinv(Bignum number, Bignum modulus); |
3709bfe9 |
314 | Bignum bignum_bitmask(Bignum number); |
9400cf6f |
315 | Bignum bignum_rshift(Bignum number, int shift); |
8c3cd914 |
316 | int bignum_cmp(Bignum a, Bignum b); |
6e522441 |
317 | char *bignum_decimal(Bignum x); |
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318 | |
a3412f52 |
319 | #ifdef DEBUG |
320 | void diagbn(char *prefix, Bignum md); |
321 | #endif |
322 | |
27cd7fc2 |
323 | void *dh_setup_group1(void); |
324 | void *dh_setup_group(Bignum pval, Bignum gval); |
325 | void dh_cleanup(void *); |
326 | Bignum dh_create_e(void *, int nbits); |
327 | Bignum dh_find_K(void *, Bignum f); |
7cca0d81 |
328 | |
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329 | int loadrsakey(const Filename *filename, struct RSAKey *key, |
330 | char *passphrase); |
331 | int rsakey_encrypted(const Filename *filename, char **comment); |
332 | int rsakey_pubblob(const Filename *filename, void **blob, int *bloblen); |
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333 | |
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334 | int saversakey(const Filename *filename, struct RSAKey *key, char *passphrase); |
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335 | |
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336 | extern int base64_decode_atom(char *atom, unsigned char *out); |
337 | extern int base64_lines(int datalen); |
338 | extern void base64_encode_atom(unsigned char *data, int n, char *out); |
339 | extern void base64_encode(FILE *fp, unsigned char *data, int datalen, int cpl); |
65a22376 |
340 | |
341 | /* ssh2_load_userkey can return this as an error */ |
342 | extern struct ssh2_userkey ssh2_wrong_passphrase; |
343 | #define SSH2_WRONG_PASSPHRASE (&ssh2_wrong_passphrase) |
344 | |
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345 | int ssh2_userkey_encrypted(const Filename *filename, char **comment); |
346 | struct ssh2_userkey *ssh2_load_userkey(const Filename *filename, |
347 | char *passphrase); |
348 | char *ssh2_userkey_loadpub(const Filename *filename, char **algorithm, |
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349 | int *pub_blob_len); |
9a30e26b |
350 | int ssh2_save_userkey(const Filename *filename, struct ssh2_userkey *key, |
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351 | char *passphrase); |
65a22376 |
352 | |
231ee168 |
353 | enum { |
354 | SSH_KEYTYPE_UNOPENABLE, |
355 | SSH_KEYTYPE_UNKNOWN, |
356 | SSH_KEYTYPE_SSH1, SSH_KEYTYPE_SSH2, |
357 | SSH_KEYTYPE_OPENSSH, SSH_KEYTYPE_SSHCOM |
358 | }; |
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359 | int key_type(const Filename *filename); |
231ee168 |
360 | char *key_type_to_str(int type); |
6e522441 |
361 | |
9dda6459 |
362 | int import_possible(int type); |
363 | int import_target_type(int type); |
9a30e26b |
364 | int import_encrypted(const Filename *filename, int type, char **comment); |
365 | int import_ssh1(const Filename *filename, int type, |
366 | struct RSAKey *key, char *passphrase); |
367 | struct ssh2_userkey *import_ssh2(const Filename *filename, int type, |
368 | char *passphrase); |
369 | int export_ssh1(const Filename *filename, int type, |
370 | struct RSAKey *key, char *passphrase); |
371 | int export_ssh2(const Filename *filename, int type, |
4801c01c |
372 | struct ssh2_userkey *key, char *passphrase); |
9dda6459 |
373 | |
65a22376 |
374 | void des3_decrypt_pubkey(unsigned char *key, unsigned char *blk, int len); |
375 | void des3_encrypt_pubkey(unsigned char *key, unsigned char *blk, int len); |
9dda6459 |
376 | void des3_decrypt_pubkey_ossh(unsigned char *key, unsigned char *iv, |
377 | unsigned char *blk, int len); |
378 | void des3_encrypt_pubkey_ossh(unsigned char *key, unsigned char *iv, |
379 | unsigned char *blk, int len); |
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380 | void aes256_encrypt_pubkey(unsigned char *key, unsigned char *blk, |
381 | int len); |
382 | void aes256_decrypt_pubkey(unsigned char *key, unsigned char *blk, |
383 | int len); |
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384 | |
2f92b717 |
385 | void des_encrypt_xdmauth(unsigned char *key, unsigned char *blk, int len); |
b3ebaa28 |
386 | void des_decrypt_xdmauth(unsigned char *key, unsigned char *blk, int len); |
2f92b717 |
387 | |
9400cf6f |
388 | /* |
389 | * For progress updates in the key generation utility. |
390 | */ |
7c7f6893 |
391 | #define PROGFN_INITIALISE 1 |
392 | #define PROGFN_LIN_PHASE 2 |
393 | #define PROGFN_EXP_PHASE 3 |
394 | #define PROGFN_PHASE_EXTENT 4 |
395 | #define PROGFN_READY 5 |
396 | #define PROGFN_PROGRESS 6 |
5c72ca61 |
397 | typedef void (*progfn_t) (void *param, int action, int phase, int progress); |
9400cf6f |
398 | |
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399 | int rsa_generate(struct RSAKey *key, int bits, progfn_t pfn, |
400 | void *pfnparam); |
5c72ca61 |
401 | int dsa_generate(struct dss_key *key, int bits, progfn_t pfn, |
402 | void *pfnparam); |
403 | Bignum primegen(int bits, int modulus, int residue, Bignum factor, |
404 | int phase, progfn_t pfn, void *pfnparam); |
4ba9b64b |
405 | |
d74d141c |
406 | |
4ba9b64b |
407 | /* |
408 | * zlib compression. |
409 | */ |
5366aed8 |
410 | void *zlib_compress_init(void); |
411 | void zlib_compress_cleanup(void *); |
412 | void *zlib_decompress_init(void); |
413 | void zlib_decompress_cleanup(void *); |
414 | int zlib_compress_block(void *, unsigned char *block, int len, |
4ba9b64b |
415 | unsigned char **outblock, int *outlen); |
5366aed8 |
416 | int zlib_decompress_block(void *, unsigned char *block, int len, |
4ba9b64b |
417 | unsigned char **outblock, int *outlen); |
1983e559 |
418 | |
419 | /* |
420 | * SSH1 agent messages. |
421 | */ |
422 | #define SSH1_AGENTC_REQUEST_RSA_IDENTITIES 1 |
423 | #define SSH1_AGENT_RSA_IDENTITIES_ANSWER 2 |
424 | #define SSH1_AGENTC_RSA_CHALLENGE 3 |
425 | #define SSH1_AGENT_RSA_RESPONSE 4 |
426 | #define SSH1_AGENTC_ADD_RSA_IDENTITY 7 |
427 | #define SSH1_AGENTC_REMOVE_RSA_IDENTITY 8 |
32874aea |
428 | #define SSH1_AGENTC_REMOVE_ALL_RSA_IDENTITIES 9 /* openssh private? */ |
1983e559 |
429 | |
430 | /* |
431 | * Messages common to SSH1 and OpenSSH's SSH2. |
432 | */ |
433 | #define SSH_AGENT_FAILURE 5 |
434 | #define SSH_AGENT_SUCCESS 6 |
435 | |
436 | /* |
437 | * OpenSSH's SSH2 agent messages. |
438 | */ |
439 | #define SSH2_AGENTC_REQUEST_IDENTITIES 11 |
440 | #define SSH2_AGENT_IDENTITIES_ANSWER 12 |
441 | #define SSH2_AGENTC_SIGN_REQUEST 13 |
442 | #define SSH2_AGENT_SIGN_RESPONSE 14 |
443 | #define SSH2_AGENTC_ADD_IDENTITY 17 |
444 | #define SSH2_AGENTC_REMOVE_IDENTITY 18 |
445 | #define SSH2_AGENTC_REMOVE_ALL_IDENTITIES 19 |
7bedb13c |
446 | |
447 | /* |
448 | * Need this to warn about support for the original SSH2 keyfile |
449 | * format. |
450 | */ |
451 | void old_keyfile_warning(void); |