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
);
19 #define lenof(x) ( (sizeof((x))) / (sizeof(*(x))))
22 #define SSH_CIPHER_IDEA 1
23 #define SSH_CIPHER_DES 2
24 #define SSH_CIPHER_3DES 3
25 #define SSH_CIPHER_BLOWFISH 6
33 #ifndef BIGNUM_INTERNAL
41 unsigned long exponent
;
42 unsigned char *modulus
;
46 Bignum private_exponent
;
58 int makekey(unsigned char *data
, struct RSAKey
*result
,
59 unsigned char **keystr
, int order
);
60 int makeprivate(unsigned char *data
, struct RSAKey
*result
);
61 void rsaencrypt(unsigned char *data
, int length
, struct RSAKey
*key
);
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
);
65 int rsastr_len(struct RSAKey
*key
);
66 void rsastr_fmt(char *str
, struct RSAKey
*key
);
67 void rsa_fingerprint(char *str
, int len
, struct RSAKey
*key
);
68 int rsa_verify(struct RSAKey
*key
);
69 unsigned char *rsa_public_blob(struct RSAKey
*key
, int *len
);
70 int rsa_public_blob_len(void *data
);
71 void freersakey(struct RSAKey
*key
);
73 typedef unsigned int word32
;
74 typedef unsigned int uint32
;
76 unsigned long crc32(const void *s
, size_t len
);
77 unsigned long crc32_update(unsigned long crc_input
, const void *s
, size_t len
);
79 /* SSH CRC compensation attack detector */
80 void *crcda_make_context(void);
81 void crcda_free_context(void *handle
);
82 int detect_attack(void *handle
, unsigned char *buf
, uint32 len
,
94 unsigned char block
[64];
100 void MD5Init(struct MD5Context
*context
);
101 void MD5Update(struct MD5Context
*context
, unsigned char const *buf
,
103 void MD5Final(unsigned char digest
[16], struct MD5Context
*context
);
107 unsigned char block
[64];
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
);
114 void SHA_Simple(void *p
, int len
, unsigned char *output
);
116 void hmac_sha1_simple(void *key
, int keylen
, void *data
, int datalen
,
117 unsigned char *output
);
121 unsigned char block
[128];
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
);
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
);
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
);
153 struct ssh2_ciphers
{
155 const struct ssh2_cipher
*const *list
;
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
);
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
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
,
195 char *keytype
; /* for host key cache */
198 struct ssh_compress
{
200 void *(*compress_init
) (void);
201 void (*compress_cleanup
) (void *);
202 int (*compress
) (void *, unsigned char *block
, int len
,
203 unsigned char **outblock
, int *outlen
);
204 void *(*decompress_init
) (void);
205 void (*decompress_cleanup
) (void *);
206 int (*decompress
) (void *, unsigned char *block
, int len
,
207 unsigned char **outblock
, int *outlen
);
208 int (*disable_compression
) (void *);
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 */
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
;
222 extern const struct ssh2_ciphers ssh2_des
;
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
;
234 * PuTTY version number formatted as an SSH version string.
236 extern char sshver
[];
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.
243 extern int ssh_fallback_cmd(void *handle
);
246 void SHATransform(word32
* digest
, word32
* data
);
249 int random_byte(void);
250 void random_add_noise(void *noise
, int length
);
251 void random_add_heavynoise(void *noise
, int length
);
253 void logevent(void *, const char *);
255 /* Allocate and register a new channel for port forwarding */
256 void *new_sock_channel(void *handle
, Socket s
);
257 void ssh_send_port_open(void *channel
, char *hostname
, int port
, char *org
);
259 /* Exports from portfwd.c */
260 extern const char *pfd_newconnect(Socket
* s
, char *hostname
, int port
,
261 void *c
, const Config
*cfg
);
262 /* desthost == NULL indicates dynamic (SOCKS) port forwarding */
263 extern const char *pfd_addforward(char *desthost
, int destport
, char *srcaddr
,
264 int port
, void *backhandle
,
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
);
272 /* Exports from x11fwd.c */
273 extern const char *x11_init(Socket
*, char *, void *, void *, const char *,
274 int, const Config
*);
275 extern void x11_close(Socket
);
276 extern int x11_send(Socket
, char *, int);
277 extern void *x11_invent_auth(char *, int, char *, int, int);
278 extern void x11_free_auth(void *);
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
);
282 void x11_get_real_auth(void *authv
, char *display
);
284 /* Platfdorm-dependent X11 function */
285 extern void platform_get_x11_auth(char *display
, int *proto
,
286 unsigned char *data
, int *datalen
);
288 Bignum
copybn(Bignum b
);
289 Bignum
bn_power_2(int n
);
290 void bn_restore_invariant(Bignum b
);
291 Bignum
bignum_from_long(unsigned long n
);
292 void freebn(Bignum b
);
293 Bignum
modpow(Bignum base
, Bignum exp
, Bignum mod
);
294 Bignum
modmul(Bignum a
, Bignum b
, Bignum mod
);
295 void decbn(Bignum n
);
296 extern Bignum Zero
, One
;
297 Bignum
bignum_from_bytes(const unsigned char *data
, int nbytes
);
298 int ssh1_read_bignum(const unsigned char *data
, Bignum
* result
);
299 int bignum_bitcount(Bignum bn
);
300 int ssh1_bignum_length(Bignum bn
);
301 int ssh2_bignum_length(Bignum bn
);
302 int bignum_byte(Bignum bn
, int i
);
303 int bignum_bit(Bignum bn
, int i
);
304 void bignum_set_bit(Bignum bn
, int i
, int value
);
305 int ssh1_write_bignum(void *data
, Bignum bn
);
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
);
310 Bignum
bigmuladd(Bignum a
, Bignum b
, Bignum addend
);
311 Bignum
bigdiv(Bignum a
, Bignum b
);
312 Bignum
bigmod(Bignum a
, Bignum b
);
313 Bignum
modinv(Bignum number
, Bignum modulus
);
314 Bignum
bignum_bitmask(Bignum number
);
315 Bignum
bignum_rshift(Bignum number
, int shift
);
316 int bignum_cmp(Bignum a
, Bignum b
);
317 char *bignum_decimal(Bignum x
);
320 void diagbn(char *prefix
, Bignum md
);
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
);
329 int loadrsakey(const Filename
*filename
, struct RSAKey
*key
,
331 int rsakey_encrypted(const Filename
*filename
, char **comment
);
332 int rsakey_pubblob(const Filename
*filename
, void **blob
, int *bloblen
);
334 int saversakey(const Filename
*filename
, struct RSAKey
*key
, char *passphrase
);
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
);
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)
345 int ssh2_userkey_encrypted(const Filename
*filename
, char **comment
);
346 struct ssh2_userkey
*ssh2_load_userkey(const Filename
*filename
,
348 char *ssh2_userkey_loadpub(const Filename
*filename
, char **algorithm
,
350 int ssh2_save_userkey(const Filename
*filename
, struct ssh2_userkey
*key
,
354 SSH_KEYTYPE_UNOPENABLE
,
356 SSH_KEYTYPE_SSH1
, SSH_KEYTYPE_SSH2
,
357 SSH_KEYTYPE_OPENSSH
, SSH_KEYTYPE_SSHCOM
359 int key_type(const Filename
*filename
);
360 char *key_type_to_str(int type
);
362 int import_possible(int type
);
363 int import_target_type(int type
);
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
,
369 int export_ssh1(const Filename
*filename
, int type
,
370 struct RSAKey
*key
, char *passphrase
);
371 int export_ssh2(const Filename
*filename
, int type
,
372 struct ssh2_userkey
*key
, char *passphrase
);
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
);
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
);
380 void aes256_encrypt_pubkey(unsigned char *key
, unsigned char *blk
,
382 void aes256_decrypt_pubkey(unsigned char *key
, unsigned char *blk
,
385 void des_encrypt_xdmauth(unsigned char *key
, unsigned char *blk
, int len
);
386 void des_decrypt_xdmauth(unsigned char *key
, unsigned char *blk
, int len
);
389 * For progress updates in the key generation utility.
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
397 typedef void (*progfn_t
) (void *param
, int action
, int phase
, int progress
);
399 int rsa_generate(struct RSAKey
*key
, int bits
, progfn_t pfn
,
401 int dsa_generate(struct dss_key
*key
, int bits
, progfn_t pfn
,
403 Bignum
primegen(int bits
, int modulus
, int residue
, Bignum factor
,
404 int phase
, progfn_t pfn
, void *pfnparam
);
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
,
415 unsigned char **outblock
, int *outlen
);
416 int zlib_decompress_block(void *, unsigned char *block
, int len
,
417 unsigned char **outblock
, int *outlen
);
420 * SSH1 agent messages.
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
428 #define SSH1_AGENTC_REMOVE_ALL_RSA_IDENTITIES 9 /* openssh private? */
431 * Messages common to SSH1 and OpenSSH's SSH2.
433 #define SSH_AGENT_FAILURE 5
434 #define SSH_AGENT_SUCCESS 6
437 * OpenSSH's SSH2 agent messages.
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
448 * Need this to warn about support for the original SSH2 keyfile
451 void old_keyfile_warning(void);