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
, int len
, struct RSAKey
*result
,
59 unsigned char **keystr
, int order
);
60 int makeprivate(unsigned char *data
, int len
, struct RSAKey
*result
);
61 int 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
, int maxlen
);
71 void freersakey(struct RSAKey
*key
);
73 typedef unsigned int word32
;
74 typedef unsigned int uint32
;
76 unsigned long crc32_compute(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
);
104 void MD5Simple(void const *p
, unsigned len
, unsigned char output
[16]);
106 void *hmacmd5_make_context(void);
107 void hmacmd5_free_context(void *handle
);
108 void hmacmd5_key(void *handle
, unsigned char const *key
, int len
);
109 void hmacmd5_do_hmac(void *handle
, unsigned char const *blk
, int len
,
110 unsigned char *hmac
);
114 unsigned char block
[64];
118 void SHA_Init(SHA_State
* s
);
119 void SHA_Bytes(SHA_State
* s
, void *p
, int len
);
120 void SHA_Final(SHA_State
* s
, unsigned char *output
);
121 void SHA_Simple(void *p
, int len
, unsigned char *output
);
123 void hmac_sha1_simple(void *key
, int keylen
, void *data
, int datalen
,
124 unsigned char *output
);
128 unsigned char block
[128];
132 void SHA512_Init(SHA512_State
* s
);
133 void SHA512_Bytes(SHA512_State
* s
, const void *p
, int len
);
134 void SHA512_Final(SHA512_State
* s
, unsigned char *output
);
135 void SHA512_Simple(const void *p
, int len
, unsigned char *output
);
138 void *(*make_context
)(void);
139 void (*free_context
)(void *);
140 void (*sesskey
) (void *, unsigned char *key
); /* for ssh 1 */
141 void (*encrypt
) (void *, unsigned char *blk
, int len
);
142 void (*decrypt
) (void *, unsigned char *blk
, int len
);
148 void *(*make_context
)(void);
149 void (*free_context
)(void *);
150 void (*setiv
) (void *, unsigned char *key
); /* for ssh 2 */
151 void (*setkey
) (void *, unsigned char *key
);/* for ssh 2 */
152 void (*encrypt
) (void *, unsigned char *blk
, int len
);
153 void (*decrypt
) (void *, unsigned char *blk
, int len
);
160 struct ssh2_ciphers
{
162 const struct ssh2_cipher
*const *list
;
166 void *(*make_context
)(void);
167 void (*free_context
)(void *);
168 void (*setkey
) (void *, unsigned char *key
);
169 void (*generate
) (void *, unsigned char *blk
, int len
, unsigned long seq
);
170 int (*verify
) (void *, unsigned char *blk
, int len
, unsigned long seq
);
178 * Plugging in another KEX algorithm requires structural chaos,
179 * so it's hard to abstract them into nice little structures
180 * like this. Fortunately, all our KEXes are basically
181 * Diffie-Hellman at the moment, so in this structure I simply
182 * parametrise the DH exchange a bit.
184 char *name
, *groupname
;
185 const unsigned char *pdata
, *gdata
;/* NULL means use group exchange */
190 void *(*newkey
) (char *data
, int len
);
191 void (*freekey
) (void *key
);
192 char *(*fmtkey
) (void *key
);
193 unsigned char *(*public_blob
) (void *key
, int *len
);
194 unsigned char *(*private_blob
) (void *key
, int *len
);
195 void *(*createkey
) (unsigned char *pub_blob
, int pub_len
,
196 unsigned char *priv_blob
, int priv_len
);
197 void *(*openssh_createkey
) (unsigned char **blob
, int *len
);
198 int (*openssh_fmtkey
) (void *key
, unsigned char *blob
, int len
);
199 int (*pubkey_bits
) (void *blob
, int len
);
200 char *(*fingerprint
) (void *key
);
201 int (*verifysig
) (void *key
, char *sig
, int siglen
,
202 char *data
, int datalen
);
203 unsigned char *(*sign
) (void *key
, char *data
, int datalen
,
206 char *keytype
; /* for host key cache */
209 struct ssh_compress
{
211 void *(*compress_init
) (void);
212 void (*compress_cleanup
) (void *);
213 int (*compress
) (void *, unsigned char *block
, int len
,
214 unsigned char **outblock
, int *outlen
);
215 void *(*decompress_init
) (void);
216 void (*decompress_cleanup
) (void *);
217 int (*decompress
) (void *, unsigned char *block
, int len
,
218 unsigned char **outblock
, int *outlen
);
219 int (*disable_compression
) (void *);
223 struct ssh2_userkey
{
224 const struct ssh_signkey
*alg
; /* the key algorithm */
225 void *data
; /* the key data */
226 char *comment
; /* the key comment */
229 extern const struct ssh_cipher ssh_3des
;
230 extern const struct ssh_cipher ssh_des
;
231 extern const struct ssh_cipher ssh_blowfish_ssh1
;
232 extern const struct ssh2_ciphers ssh2_3des
;
233 extern const struct ssh2_ciphers ssh2_des
;
234 extern const struct ssh2_ciphers ssh2_aes
;
235 extern const struct ssh2_ciphers ssh2_blowfish
;
236 extern const struct ssh_kex ssh_diffiehellman_group1
;
237 extern const struct ssh_kex ssh_diffiehellman_group14
;
238 extern const struct ssh_kex ssh_diffiehellman_gex
;
239 extern const struct ssh_signkey ssh_dss
;
240 extern const struct ssh_signkey ssh_rsa
;
241 extern const struct ssh_mac ssh_md5
;
242 extern const struct ssh_mac ssh_sha1
;
243 extern const struct ssh_mac ssh_sha1_buggy
;
246 * PuTTY version number formatted as an SSH version string.
248 extern char sshver
[];
251 * Gross hack: pscp will try to start SFTP but fall back to scp1 if
252 * that fails. This variable is the means by which scp.c can reach
253 * into the SSH code and find out which one it got.
255 extern int ssh_fallback_cmd(void *handle
);
258 void SHATransform(word32
* digest
, word32
* data
);
261 int random_byte(void);
262 void random_add_noise(void *noise
, int length
);
263 void random_add_heavynoise(void *noise
, int length
);
265 void logevent(void *, const char *);
267 /* Allocate and register a new channel for port forwarding */
268 void *new_sock_channel(void *handle
, Socket s
);
269 void ssh_send_port_open(void *channel
, char *hostname
, int port
, char *org
);
271 /* Exports from portfwd.c */
272 extern const char *pfd_newconnect(Socket
* s
, char *hostname
, int port
,
273 void *c
, const Config
*cfg
);
274 /* desthost == NULL indicates dynamic (SOCKS) port forwarding */
275 extern const char *pfd_addforward(char *desthost
, int destport
, char *srcaddr
,
276 int port
, void *backhandle
,
278 extern void pfd_close(Socket s
);
279 extern int pfd_send(Socket s
, char *data
, int len
);
280 extern void pfd_confirm(Socket s
);
281 extern void pfd_unthrottle(Socket s
);
282 extern void pfd_override_throttle(Socket s
, int enable
);
284 /* Exports from x11fwd.c */
285 extern const char *x11_init(Socket
*, char *, void *, void *, const char *,
286 int, const Config
*);
287 extern void x11_close(Socket
);
288 extern int x11_send(Socket
, char *, int);
289 extern void *x11_invent_auth(char *, int, char *, int, int);
290 extern void x11_free_auth(void *);
291 extern void x11_unthrottle(Socket s
);
292 extern void x11_override_throttle(Socket s
, int enable
);
293 extern int x11_get_screen_number(char *display
);
294 void x11_get_real_auth(void *authv
, char *display
);
295 char *x11_display(const char *display
);
297 /* Platform-dependent X11 functions */
298 extern void platform_get_x11_auth(char *display
, int *proto
,
299 unsigned char *data
, int *datalen
);
300 extern const char platform_x11_best_transport
[];
301 /* best X11 hostname for this platform if none specified */
302 SockAddr
platform_get_x11_unix_address(int displaynum
, char **canonicalname
);
303 /* make up a SockAddr naming the address for displaynum */
304 char *platform_get_x_display(void);
305 /* allocated local X display string, if any */
307 Bignum
copybn(Bignum b
);
308 Bignum
bn_power_2(int n
);
309 void bn_restore_invariant(Bignum b
);
310 Bignum
bignum_from_long(unsigned long n
);
311 void freebn(Bignum b
);
312 Bignum
modpow(Bignum base
, Bignum exp
, Bignum mod
);
313 Bignum
modmul(Bignum a
, Bignum b
, Bignum mod
);
314 void decbn(Bignum n
);
315 extern Bignum Zero
, One
;
316 Bignum
bignum_from_bytes(const unsigned char *data
, int nbytes
);
317 int ssh1_read_bignum(const unsigned char *data
, int len
, Bignum
* result
);
318 int bignum_bitcount(Bignum bn
);
319 int ssh1_bignum_length(Bignum bn
);
320 int ssh2_bignum_length(Bignum bn
);
321 int bignum_byte(Bignum bn
, int i
);
322 int bignum_bit(Bignum bn
, int i
);
323 void bignum_set_bit(Bignum bn
, int i
, int value
);
324 int ssh1_write_bignum(void *data
, Bignum bn
);
325 Bignum
biggcd(Bignum a
, Bignum b
);
326 unsigned short bignum_mod_short(Bignum number
, unsigned short modulus
);
327 Bignum
bignum_add_long(Bignum number
, unsigned long addend
);
328 Bignum
bigmul(Bignum a
, Bignum b
);
329 Bignum
bigmuladd(Bignum a
, Bignum b
, Bignum addend
);
330 Bignum
bigdiv(Bignum a
, Bignum b
);
331 Bignum
bigmod(Bignum a
, Bignum b
);
332 Bignum
modinv(Bignum number
, Bignum modulus
);
333 Bignum
bignum_bitmask(Bignum number
);
334 Bignum
bignum_rshift(Bignum number
, int shift
);
335 int bignum_cmp(Bignum a
, Bignum b
);
336 char *bignum_decimal(Bignum x
);
339 void diagbn(char *prefix
, Bignum md
);
342 void *dh_setup_group(const struct ssh_kex
*kex
);
343 void *dh_setup_gex(Bignum pval
, Bignum gval
);
344 void dh_cleanup(void *);
345 Bignum
dh_create_e(void *, int nbits
);
346 Bignum
dh_find_K(void *, Bignum f
);
348 int loadrsakey(const Filename
*filename
, struct RSAKey
*key
,
349 char *passphrase
, const char **errorstr
);
350 int rsakey_encrypted(const Filename
*filename
, char **comment
);
351 int rsakey_pubblob(const Filename
*filename
, void **blob
, int *bloblen
,
352 const char **errorstr
);
354 int saversakey(const Filename
*filename
, struct RSAKey
*key
, char *passphrase
);
356 extern int base64_decode_atom(char *atom
, unsigned char *out
);
357 extern int base64_lines(int datalen
);
358 extern void base64_encode_atom(unsigned char *data
, int n
, char *out
);
359 extern void base64_encode(FILE *fp
, unsigned char *data
, int datalen
, int cpl
);
361 /* ssh2_load_userkey can return this as an error */
362 extern struct ssh2_userkey ssh2_wrong_passphrase
;
363 #define SSH2_WRONG_PASSPHRASE (&ssh2_wrong_passphrase)
365 int ssh2_userkey_encrypted(const Filename
*filename
, char **comment
);
366 struct ssh2_userkey
*ssh2_load_userkey(const Filename
*filename
,
367 char *passphrase
, const char **errorstr
);
368 char *ssh2_userkey_loadpub(const Filename
*filename
, char **algorithm
,
369 int *pub_blob_len
, const char **errorstr
);
370 int ssh2_save_userkey(const Filename
*filename
, struct ssh2_userkey
*key
,
372 const struct ssh_signkey
*find_pubkey_alg(const char *name
);
375 SSH_KEYTYPE_UNOPENABLE
,
377 SSH_KEYTYPE_SSH1
, SSH_KEYTYPE_SSH2
,
378 SSH_KEYTYPE_OPENSSH
, SSH_KEYTYPE_SSHCOM
380 int key_type(const Filename
*filename
);
381 char *key_type_to_str(int type
);
383 int import_possible(int type
);
384 int import_target_type(int type
);
385 int import_encrypted(const Filename
*filename
, int type
, char **comment
);
386 int import_ssh1(const Filename
*filename
, int type
,
387 struct RSAKey
*key
, char *passphrase
);
388 struct ssh2_userkey
*import_ssh2(const Filename
*filename
, int type
,
390 int export_ssh1(const Filename
*filename
, int type
,
391 struct RSAKey
*key
, char *passphrase
);
392 int export_ssh2(const Filename
*filename
, int type
,
393 struct ssh2_userkey
*key
, char *passphrase
);
395 void des3_decrypt_pubkey(unsigned char *key
, unsigned char *blk
, int len
);
396 void des3_encrypt_pubkey(unsigned char *key
, unsigned char *blk
, int len
);
397 void des3_decrypt_pubkey_ossh(unsigned char *key
, unsigned char *iv
,
398 unsigned char *blk
, int len
);
399 void des3_encrypt_pubkey_ossh(unsigned char *key
, unsigned char *iv
,
400 unsigned char *blk
, int len
);
401 void aes256_encrypt_pubkey(unsigned char *key
, unsigned char *blk
,
403 void aes256_decrypt_pubkey(unsigned char *key
, unsigned char *blk
,
406 void des_encrypt_xdmauth(unsigned char *key
, unsigned char *blk
, int len
);
407 void des_decrypt_xdmauth(unsigned char *key
, unsigned char *blk
, int len
);
410 * For progress updates in the key generation utility.
412 #define PROGFN_INITIALISE 1
413 #define PROGFN_LIN_PHASE 2
414 #define PROGFN_EXP_PHASE 3
415 #define PROGFN_PHASE_EXTENT 4
416 #define PROGFN_READY 5
417 #define PROGFN_PROGRESS 6
418 typedef void (*progfn_t
) (void *param
, int action
, int phase
, int progress
);
420 int rsa_generate(struct RSAKey
*key
, int bits
, progfn_t pfn
,
422 int dsa_generate(struct dss_key
*key
, int bits
, progfn_t pfn
,
424 Bignum
primegen(int bits
, int modulus
, int residue
, Bignum factor
,
425 int phase
, progfn_t pfn
, void *pfnparam
);
431 void *zlib_compress_init(void);
432 void zlib_compress_cleanup(void *);
433 void *zlib_decompress_init(void);
434 void zlib_decompress_cleanup(void *);
435 int zlib_compress_block(void *, unsigned char *block
, int len
,
436 unsigned char **outblock
, int *outlen
);
437 int zlib_decompress_block(void *, unsigned char *block
, int len
,
438 unsigned char **outblock
, int *outlen
);
441 * SSH1 agent messages.
443 #define SSH1_AGENTC_REQUEST_RSA_IDENTITIES 1
444 #define SSH1_AGENT_RSA_IDENTITIES_ANSWER 2
445 #define SSH1_AGENTC_RSA_CHALLENGE 3
446 #define SSH1_AGENT_RSA_RESPONSE 4
447 #define SSH1_AGENTC_ADD_RSA_IDENTITY 7
448 #define SSH1_AGENTC_REMOVE_RSA_IDENTITY 8
449 #define SSH1_AGENTC_REMOVE_ALL_RSA_IDENTITIES 9 /* openssh private? */
452 * Messages common to SSH1 and OpenSSH's SSH2.
454 #define SSH_AGENT_FAILURE 5
455 #define SSH_AGENT_SUCCESS 6
458 * OpenSSH's SSH2 agent messages.
460 #define SSH2_AGENTC_REQUEST_IDENTITIES 11
461 #define SSH2_AGENT_IDENTITIES_ANSWER 12
462 #define SSH2_AGENTC_SIGN_REQUEST 13
463 #define SSH2_AGENT_SIGN_RESPONSE 14
464 #define SSH2_AGENTC_ADD_IDENTITY 17
465 #define SSH2_AGENTC_REMOVE_IDENTITY 18
466 #define SSH2_AGENTC_REMOVE_ALL_IDENTITIES 19
469 * Need this to warn about support for the original SSH2 keyfile
472 void old_keyfile_warning(void);