37508af4 |
1 | #include <string.h> |
2 | |
dcbde236 |
3 | #include "puttymem.h" |
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4 | #include "network.h" |
5c72ca61 |
5 | #include "int64.h" |
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6 | |
2871113a |
7 | struct ssh_channel; |
8 | |
5471d09a |
9 | extern void sshfwd_close(struct ssh_channel *c); |
10 | extern int sshfwd_write(struct ssh_channel *c, char *, int); |
11 | extern void sshfwd_unthrottle(struct ssh_channel *c, int bufsize); |
12 | |
e5574168 |
13 | /* |
14 | * Useful thing. |
15 | */ |
16 | #ifndef lenof |
17 | #define lenof(x) ( (sizeof((x))) / (sizeof(*(x)))) |
18 | #endif |
19 | |
bea1ef5f |
20 | #define SSH_CIPHER_IDEA 1 |
9697bfd2 |
21 | #define SSH_CIPHER_DES 2 |
bea1ef5f |
22 | #define SSH_CIPHER_3DES 3 |
23 | #define SSH_CIPHER_BLOWFISH 6 |
24 | |
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25 | #ifdef MSCRYPTOAPI |
26 | #define APIEXTRA 8 |
27 | #else |
28 | #define APIEXTRA 0 |
29 | #endif |
30 | |
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31 | #ifndef BIGNUM_INTERNAL |
32 | typedef void *Bignum; |
33 | #endif |
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34 | |
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35 | struct RSAKey { |
36 | int bits; |
37 | int bytes; |
8f203108 |
38 | #ifdef MSCRYPTOAPI |
39 | unsigned long exponent; |
40 | unsigned char *modulus; |
41 | #else |
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42 | Bignum modulus; |
43 | Bignum exponent; |
44 | Bignum private_exponent; |
9400cf6f |
45 | Bignum p; |
46 | Bignum q; |
47 | Bignum iqmp; |
65a22376 |
48 | #endif |
49 | char *comment; |
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50 | }; |
51 | |
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52 | struct dss_key { |
53 | Bignum p, q, g, y, x; |
54 | }; |
55 | |
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56 | int makekey(unsigned char *data, struct RSAKey *result, |
7cca0d81 |
57 | unsigned char **keystr, int order); |
58 | int makeprivate(unsigned char *data, struct RSAKey *result); |
374330e2 |
59 | void rsaencrypt(unsigned char *data, int length, struct RSAKey *key); |
7cca0d81 |
60 | Bignum rsadecrypt(Bignum input, struct RSAKey *key); |
61 | void rsasign(unsigned char *data, int length, struct RSAKey *key); |
62 | void rsasanitise(struct RSAKey *key); |
374330e2 |
63 | int rsastr_len(struct RSAKey *key); |
64 | void rsastr_fmt(char *str, struct RSAKey *key); |
1c2a93c4 |
65 | void rsa_fingerprint(char *str, int len, struct RSAKey *key); |
014970c8 |
66 | int rsa_verify(struct RSAKey *key); |
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67 | unsigned char *rsa_public_blob(struct RSAKey *key, int *len); |
68 | int rsa_public_blob_len(void *data); |
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69 | void freersakey(struct RSAKey *key); |
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70 | |
71 | typedef unsigned int word32; |
72 | typedef unsigned int uint32; |
73 | |
8160fbfc |
74 | unsigned long crc32(const void *s, size_t len); |
9a3a93a5 |
75 | unsigned long crc32_update(unsigned long crc_input, const void *s, size_t len); |
76 | |
77 | /* SSH CRC compensation attack detector */ |
0183b242 |
78 | void *crcda_make_context(void); |
79 | void crcda_free_context(void *handle); |
80 | int detect_attack(void *handle, unsigned char *buf, uint32 len, |
81 | unsigned char *IV); |
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82 | |
48672163 |
83 | typedef struct { |
84 | uint32 h[4]; |
85 | } MD5_Core_State; |
86 | |
374330e2 |
87 | struct MD5Context { |
8f203108 |
88 | #ifdef MSCRYPTOAPI |
89 | unsigned long hHash; |
90 | #else |
48672163 |
91 | MD5_Core_State core; |
bb093ca7 |
92 | unsigned char block[64]; |
48672163 |
93 | int blkused; |
94 | uint32 lenhi, lenlo; |
8f203108 |
95 | #endif |
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96 | }; |
97 | |
98 | void MD5Init(struct MD5Context *context); |
99 | void MD5Update(struct MD5Context *context, unsigned char const *buf, |
32874aea |
100 | unsigned len); |
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101 | void MD5Final(unsigned char digest[16], struct MD5Context *context); |
102 | |
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103 | typedef struct { |
104 | uint32 h[5]; |
105 | unsigned char block[64]; |
106 | int blkused; |
107 | uint32 lenhi, lenlo; |
108 | } SHA_State; |
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109 | void SHA_Init(SHA_State * s); |
110 | void SHA_Bytes(SHA_State * s, void *p, int len); |
111 | void SHA_Final(SHA_State * s, unsigned char *output); |
7cca0d81 |
112 | void SHA_Simple(void *p, int len, unsigned char *output); |
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113 | |
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114 | void hmac_sha1_simple(void *key, int keylen, void *data, int datalen, |
115 | unsigned char *output); |
116 | |
117 | typedef struct { |
118 | uint64 h[8]; |
119 | unsigned char block[128]; |
120 | int blkused; |
121 | uint32 len[4]; |
122 | } SHA512_State; |
123 | void SHA512_Init(SHA512_State * s); |
124 | void SHA512_Bytes(SHA512_State * s, const void *p, int len); |
125 | void SHA512_Final(SHA512_State * s, unsigned char *output); |
126 | void SHA512_Simple(const void *p, int len, unsigned char *output); |
127 | |
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128 | struct ssh_cipher { |
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129 | void *(*make_context)(void); |
130 | void (*free_context)(void *); |
131 | void (*sesskey) (void *, unsigned char *key); /* for ssh 1 */ |
132 | void (*encrypt) (void *, unsigned char *blk, int len); |
133 | void (*decrypt) (void *, unsigned char *blk, int len); |
0a3f1d48 |
134 | int blksize; |
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135 | char *text_name; |
0a3f1d48 |
136 | }; |
137 | |
138 | struct ssh2_cipher { |
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139 | void *(*make_context)(void); |
140 | void (*free_context)(void *); |
141 | void (*setiv) (void *, unsigned char *key); /* for ssh 2 */ |
142 | void (*setkey) (void *, unsigned char *key);/* for ssh 2 */ |
143 | void (*encrypt) (void *, unsigned char *blk, int len); |
144 | void (*decrypt) (void *, unsigned char *blk, int len); |
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145 | char *name; |
146 | int blksize; |
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147 | int keylen; |
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148 | char *text_name; |
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149 | }; |
150 | |
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151 | struct ssh2_ciphers { |
152 | int nciphers; |
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153 | const struct ssh2_cipher *const *list; |
0a3f1d48 |
154 | }; |
155 | |
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156 | struct ssh_mac { |
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157 | void *(*make_context)(void); |
158 | void (*free_context)(void *); |
159 | void (*setkey) (void *, unsigned char *key); |
160 | void (*generate) (void *, unsigned char *blk, int len, unsigned long seq); |
161 | int (*verify) (void *, unsigned char *blk, int len, unsigned long seq); |
e5574168 |
162 | char *name; |
163 | int len; |
164 | }; |
165 | |
166 | struct ssh_kex { |
7cca0d81 |
167 | /* |
168 | * Plugging in another KEX algorithm requires structural chaos, |
169 | * so it's hard to abstract them into nice little structures |
170 | * like this. Hence, for the moment, this is just a |
171 | * placeholder. I claim justification in the fact that OpenSSH |
172 | * does this too :-) |
173 | */ |
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174 | char *name; |
175 | }; |
176 | |
e055a386 |
177 | struct ssh_signkey { |
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178 | void *(*newkey) (char *data, int len); |
179 | void (*freekey) (void *key); |
180 | char *(*fmtkey) (void *key); |
181 | unsigned char *(*public_blob) (void *key, int *len); |
182 | unsigned char *(*private_blob) (void *key, int *len); |
183 | void *(*createkey) (unsigned char *pub_blob, int pub_len, |
184 | unsigned char *priv_blob, int priv_len); |
185 | void *(*openssh_createkey) (unsigned char **blob, int *len); |
186 | int (*openssh_fmtkey) (void *key, unsigned char *blob, int len); |
187 | char *(*fingerprint) (void *key); |
188 | int (*verifysig) (void *key, char *sig, int siglen, |
189 | char *data, int datalen); |
190 | unsigned char *(*sign) (void *key, char *data, int datalen, |
191 | int *siglen); |
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192 | char *name; |
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193 | char *keytype; /* for host key cache */ |
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194 | }; |
195 | |
196 | struct ssh_compress { |
197 | char *name; |
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198 | void *(*compress_init) (void); |
199 | void (*compress_cleanup) (void *); |
200 | int (*compress) (void *, unsigned char *block, int len, |
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201 | unsigned char **outblock, int *outlen); |
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202 | void *(*decompress_init) (void); |
203 | void (*decompress_cleanup) (void *); |
204 | int (*decompress) (void *, unsigned char *block, int len, |
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205 | unsigned char **outblock, int *outlen); |
5366aed8 |
206 | int (*disable_compression) (void *); |
207 | char *text_name; |
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208 | }; |
209 | |
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210 | struct ssh2_userkey { |
211 | const struct ssh_signkey *alg; /* the key algorithm */ |
212 | void *data; /* the key data */ |
213 | char *comment; /* the key comment */ |
214 | }; |
215 | |
216 | extern const struct ssh_cipher ssh_3des; |
217 | extern const struct ssh_cipher ssh_des; |
218 | extern const struct ssh_cipher ssh_blowfish_ssh1; |
219 | extern const struct ssh2_ciphers ssh2_3des; |
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220 | extern const struct ssh2_ciphers ssh2_des; |
65a22376 |
221 | extern const struct ssh2_ciphers ssh2_aes; |
222 | extern const struct ssh2_ciphers ssh2_blowfish; |
223 | extern const struct ssh_kex ssh_diffiehellman; |
224 | extern const struct ssh_kex ssh_diffiehellman_gex; |
225 | extern const struct ssh_signkey ssh_dss; |
226 | extern const struct ssh_signkey ssh_rsa; |
227 | extern const struct ssh_mac ssh_md5; |
228 | extern const struct ssh_mac ssh_sha1; |
229 | extern const struct ssh_mac ssh_sha1_buggy; |
230 | |
900a4ee6 |
231 | /* |
232 | * PuTTY version number formatted as an SSH version string. |
233 | */ |
234 | extern char sshver[]; |
235 | |
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236 | /* |
237 | * Gross hack: pscp will try to start SFTP but fall back to scp1 if |
238 | * that fails. This variable is the means by which scp.c can reach |
239 | * into the SSH code and find out which one it got. |
240 | */ |
51470298 |
241 | extern int ssh_fallback_cmd(void *handle); |
fd5e5847 |
242 | |
8f203108 |
243 | #ifndef MSCRYPTOAPI |
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244 | void SHATransform(word32 * digest, word32 * data); |
8f203108 |
245 | #endif |
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246 | |
247 | int random_byte(void); |
248 | void random_add_noise(void *noise, int length); |
6e522441 |
249 | void random_add_heavynoise(void *noise, int length); |
c5e9c988 |
250 | |
a8327734 |
251 | void logevent(void *, char *); |
51470298 |
252 | |
253 | /* Allocate and register a new channel for port forwarding */ |
254 | void *new_sock_channel(void *handle, Socket s); |
6b78788a |
255 | void ssh_send_port_open(void *channel, char *hostname, int port, char *org); |
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256 | |
7cca0d81 |
257 | Bignum copybn(Bignum b); |
3709bfe9 |
258 | Bignum bn_power_2(int n); |
259 | void bn_restore_invariant(Bignum b); |
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260 | Bignum bignum_from_long(unsigned long n); |
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261 | void freebn(Bignum b); |
59600f67 |
262 | Bignum modpow(Bignum base, Bignum exp, Bignum mod); |
263 | Bignum modmul(Bignum a, Bignum b, Bignum mod); |
7cca0d81 |
264 | void decbn(Bignum n); |
265 | extern Bignum Zero, One; |
27cd7fc2 |
266 | Bignum bignum_from_bytes(const unsigned char *data, int nbytes); |
267 | int ssh1_read_bignum(const unsigned char *data, Bignum * result); |
ddecd643 |
268 | int bignum_bitcount(Bignum bn); |
5c58ad2d |
269 | int ssh1_bignum_length(Bignum bn); |
260f3dec |
270 | int ssh2_bignum_length(Bignum bn); |
5c58ad2d |
271 | int bignum_byte(Bignum bn, int i); |
9400cf6f |
272 | int bignum_bit(Bignum bn, int i); |
273 | void bignum_set_bit(Bignum bn, int i, int value); |
5c58ad2d |
274 | int ssh1_write_bignum(void *data, Bignum bn); |
9400cf6f |
275 | Bignum biggcd(Bignum a, Bignum b); |
276 | unsigned short bignum_mod_short(Bignum number, unsigned short modulus); |
277 | Bignum bignum_add_long(Bignum number, unsigned long addend); |
278 | Bignum bigmul(Bignum a, Bignum b); |
5c72ca61 |
279 | Bignum bigmuladd(Bignum a, Bignum b, Bignum addend); |
280 | Bignum bigdiv(Bignum a, Bignum b); |
281 | Bignum bigmod(Bignum a, Bignum b); |
9400cf6f |
282 | Bignum modinv(Bignum number, Bignum modulus); |
3709bfe9 |
283 | Bignum bignum_bitmask(Bignum number); |
9400cf6f |
284 | Bignum bignum_rshift(Bignum number, int shift); |
8c3cd914 |
285 | int bignum_cmp(Bignum a, Bignum b); |
6e522441 |
286 | char *bignum_decimal(Bignum x); |
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287 | |
27cd7fc2 |
288 | void *dh_setup_group1(void); |
289 | void *dh_setup_group(Bignum pval, Bignum gval); |
290 | void dh_cleanup(void *); |
291 | Bignum dh_create_e(void *, int nbits); |
292 | Bignum dh_find_K(void *, Bignum f); |
7cca0d81 |
293 | |
65a22376 |
294 | int loadrsakey(char *filename, struct RSAKey *key, char *passphrase); |
a52f067e |
295 | int rsakey_encrypted(char *filename, char **comment); |
3f2d010c |
296 | int rsakey_pubblob(char *filename, void **blob, int *bloblen); |
7cca0d81 |
297 | |
65a22376 |
298 | int saversakey(char *filename, struct RSAKey *key, char *passphrase); |
299 | |
300 | void base64_encode_atom(unsigned char *data, int n, char *out); |
301 | |
302 | /* ssh2_load_userkey can return this as an error */ |
303 | extern struct ssh2_userkey ssh2_wrong_passphrase; |
304 | #define SSH2_WRONG_PASSPHRASE (&ssh2_wrong_passphrase) |
305 | |
306 | int ssh2_userkey_encrypted(char *filename, char **comment); |
307 | struct ssh2_userkey *ssh2_load_userkey(char *filename, char *passphrase); |
32874aea |
308 | char *ssh2_userkey_loadpub(char *filename, char **algorithm, |
309 | int *pub_blob_len); |
310 | int ssh2_save_userkey(char *filename, struct ssh2_userkey *key, |
311 | char *passphrase); |
65a22376 |
312 | |
231ee168 |
313 | enum { |
314 | SSH_KEYTYPE_UNOPENABLE, |
315 | SSH_KEYTYPE_UNKNOWN, |
316 | SSH_KEYTYPE_SSH1, SSH_KEYTYPE_SSH2, |
317 | SSH_KEYTYPE_OPENSSH, SSH_KEYTYPE_SSHCOM |
318 | }; |
319 | int key_type(char *filename); |
320 | char *key_type_to_str(int type); |
6e522441 |
321 | |
9dda6459 |
322 | int import_possible(int type); |
323 | int import_target_type(int type); |
324 | int import_encrypted(char *filename, int type, char **comment); |
325 | int import_ssh1(char *filename, int type, struct RSAKey *key,char *passphrase); |
326 | struct ssh2_userkey *import_ssh2(char *filename, int type, char *passphrase); |
4801c01c |
327 | int export_ssh1(char *filename, int type, struct RSAKey *key,char *passphrase); |
328 | int export_ssh2(char *filename, int type, |
329 | struct ssh2_userkey *key, char *passphrase); |
9dda6459 |
330 | |
65a22376 |
331 | void des3_decrypt_pubkey(unsigned char *key, unsigned char *blk, int len); |
332 | void des3_encrypt_pubkey(unsigned char *key, unsigned char *blk, int len); |
9dda6459 |
333 | void des3_decrypt_pubkey_ossh(unsigned char *key, unsigned char *iv, |
334 | unsigned char *blk, int len); |
335 | void des3_encrypt_pubkey_ossh(unsigned char *key, unsigned char *iv, |
336 | unsigned char *blk, int len); |
32874aea |
337 | void aes256_encrypt_pubkey(unsigned char *key, unsigned char *blk, |
338 | int len); |
339 | void aes256_decrypt_pubkey(unsigned char *key, unsigned char *blk, |
340 | int len); |
9400cf6f |
341 | |
342 | /* |
343 | * For progress updates in the key generation utility. |
344 | */ |
7c7f6893 |
345 | #define PROGFN_INITIALISE 1 |
346 | #define PROGFN_LIN_PHASE 2 |
347 | #define PROGFN_EXP_PHASE 3 |
348 | #define PROGFN_PHASE_EXTENT 4 |
349 | #define PROGFN_READY 5 |
350 | #define PROGFN_PROGRESS 6 |
5c72ca61 |
351 | typedef void (*progfn_t) (void *param, int action, int phase, int progress); |
9400cf6f |
352 | |
32874aea |
353 | int rsa_generate(struct RSAKey *key, int bits, progfn_t pfn, |
354 | void *pfnparam); |
5c72ca61 |
355 | int dsa_generate(struct dss_key *key, int bits, progfn_t pfn, |
356 | void *pfnparam); |
357 | Bignum primegen(int bits, int modulus, int residue, Bignum factor, |
358 | int phase, progfn_t pfn, void *pfnparam); |
4ba9b64b |
359 | |
d74d141c |
360 | |
4ba9b64b |
361 | /* |
362 | * zlib compression. |
363 | */ |
5366aed8 |
364 | void *zlib_compress_init(void); |
365 | void zlib_compress_cleanup(void *); |
366 | void *zlib_decompress_init(void); |
367 | void zlib_decompress_cleanup(void *); |
368 | int zlib_compress_block(void *, unsigned char *block, int len, |
4ba9b64b |
369 | unsigned char **outblock, int *outlen); |
5366aed8 |
370 | int zlib_decompress_block(void *, unsigned char *block, int len, |
4ba9b64b |
371 | unsigned char **outblock, int *outlen); |
1983e559 |
372 | |
373 | /* |
374 | * SSH1 agent messages. |
375 | */ |
376 | #define SSH1_AGENTC_REQUEST_RSA_IDENTITIES 1 |
377 | #define SSH1_AGENT_RSA_IDENTITIES_ANSWER 2 |
378 | #define SSH1_AGENTC_RSA_CHALLENGE 3 |
379 | #define SSH1_AGENT_RSA_RESPONSE 4 |
380 | #define SSH1_AGENTC_ADD_RSA_IDENTITY 7 |
381 | #define SSH1_AGENTC_REMOVE_RSA_IDENTITY 8 |
32874aea |
382 | #define SSH1_AGENTC_REMOVE_ALL_RSA_IDENTITIES 9 /* openssh private? */ |
1983e559 |
383 | |
384 | /* |
385 | * Messages common to SSH1 and OpenSSH's SSH2. |
386 | */ |
387 | #define SSH_AGENT_FAILURE 5 |
388 | #define SSH_AGENT_SUCCESS 6 |
389 | |
390 | /* |
391 | * OpenSSH's SSH2 agent messages. |
392 | */ |
393 | #define SSH2_AGENTC_REQUEST_IDENTITIES 11 |
394 | #define SSH2_AGENT_IDENTITIES_ANSWER 12 |
395 | #define SSH2_AGENTC_SIGN_REQUEST 13 |
396 | #define SSH2_AGENT_SIGN_RESPONSE 14 |
397 | #define SSH2_AGENTC_ADD_IDENTITY 17 |
398 | #define SSH2_AGENTC_REMOVE_IDENTITY 18 |
399 | #define SSH2_AGENTC_REMOVE_ALL_IDENTITIES 19 |
7bedb13c |
400 | |
401 | /* |
402 | * Need this to warn about support for the original SSH2 keyfile |
403 | * format. |
404 | */ |
405 | void old_keyfile_warning(void); |