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
, void 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
);
158 #define SSH_CIPHER_IS_CBC 1
162 struct ssh2_ciphers
{
164 const struct ssh2_cipher
*const *list
;
168 void *(*make_context
)(void);
169 void (*free_context
)(void *);
170 void (*setkey
) (void *, unsigned char *key
);
171 void (*generate
) (void *, unsigned char *blk
, int len
, unsigned long seq
);
172 int (*verify
) (void *, unsigned char *blk
, int len
, unsigned long seq
);
179 void *(*init
)(void); /* also allocates context */
180 void (*bytes
)(void *, void *, int);
181 void (*final
)(void *, unsigned char *); /* also frees context */
182 int hlen
; /* output length in bytes */
187 * Plugging in another KEX algorithm requires structural chaos,
188 * so it's hard to abstract them into nice little structures
189 * like this. Fortunately, all our KEXes are basically
190 * Diffie-Hellman at the moment, so in this structure I simply
191 * parametrise the DH exchange a bit.
193 char *name
, *groupname
;
194 const unsigned char *pdata
, *gdata
;/* NULL means use group exchange */
196 const struct ssh_hash
*hash
;
200 void *(*newkey
) (char *data
, int len
);
201 void (*freekey
) (void *key
);
202 char *(*fmtkey
) (void *key
);
203 unsigned char *(*public_blob
) (void *key
, int *len
);
204 unsigned char *(*private_blob
) (void *key
, int *len
);
205 void *(*createkey
) (unsigned char *pub_blob
, int pub_len
,
206 unsigned char *priv_blob
, int priv_len
);
207 void *(*openssh_createkey
) (unsigned char **blob
, int *len
);
208 int (*openssh_fmtkey
) (void *key
, unsigned char *blob
, int len
);
209 int (*pubkey_bits
) (void *blob
, int len
);
210 char *(*fingerprint
) (void *key
);
211 int (*verifysig
) (void *key
, char *sig
, int siglen
,
212 char *data
, int datalen
);
213 unsigned char *(*sign
) (void *key
, char *data
, int datalen
,
216 char *keytype
; /* for host key cache */
219 struct ssh_compress
{
221 void *(*compress_init
) (void);
222 void (*compress_cleanup
) (void *);
223 int (*compress
) (void *, unsigned char *block
, int len
,
224 unsigned char **outblock
, int *outlen
);
225 void *(*decompress_init
) (void);
226 void (*decompress_cleanup
) (void *);
227 int (*decompress
) (void *, unsigned char *block
, int len
,
228 unsigned char **outblock
, int *outlen
);
229 int (*disable_compression
) (void *);
233 struct ssh2_userkey
{
234 const struct ssh_signkey
*alg
; /* the key algorithm */
235 void *data
; /* the key data */
236 char *comment
; /* the key comment */
239 extern const struct ssh_cipher ssh_3des
;
240 extern const struct ssh_cipher ssh_des
;
241 extern const struct ssh_cipher ssh_blowfish_ssh1
;
242 extern const struct ssh2_ciphers ssh2_3des
;
243 extern const struct ssh2_ciphers ssh2_des
;
244 extern const struct ssh2_ciphers ssh2_aes
;
245 extern const struct ssh2_ciphers ssh2_blowfish
;
246 extern const struct ssh2_ciphers ssh2_arcfour
;
247 extern const struct ssh_hash ssh_sha1
;
248 extern const struct ssh_kex ssh_diffiehellman_group1
;
249 extern const struct ssh_kex ssh_diffiehellman_group14
;
250 extern const struct ssh_kex ssh_diffiehellman_gex
;
251 extern const struct ssh_signkey ssh_dss
;
252 extern const struct ssh_signkey ssh_rsa
;
253 extern const struct ssh_mac ssh_hmac_md5
;
254 extern const struct ssh_mac ssh_hmac_sha1
;
255 extern const struct ssh_mac ssh_hmac_sha1_buggy
;
259 * PuTTY version number formatted as an SSH version string.
261 extern char sshver
[];
264 * Gross hack: pscp will try to start SFTP but fall back to scp1 if
265 * that fails. This variable is the means by which scp.c can reach
266 * into the SSH code and find out which one it got.
268 extern int ssh_fallback_cmd(void *handle
);
271 void SHATransform(word32
* digest
, word32
* data
);
274 int random_byte(void);
275 void random_add_noise(void *noise
, int length
);
276 void random_add_heavynoise(void *noise
, int length
);
278 void logevent(void *, const char *);
280 /* Allocate and register a new channel for port forwarding */
281 void *new_sock_channel(void *handle
, Socket s
);
282 void ssh_send_port_open(void *channel
, char *hostname
, int port
, char *org
);
284 /* Exports from portfwd.c */
285 extern const char *pfd_newconnect(Socket
* s
, char *hostname
, int port
,
286 void *c
, const Config
*cfg
,
288 /* desthost == NULL indicates dynamic (SOCKS) port forwarding */
289 extern const char *pfd_addforward(char *desthost
, int destport
, char *srcaddr
,
290 int port
, void *backhandle
,
291 const Config
*cfg
, void **sockdata
,
293 extern void pfd_close(Socket s
);
294 extern void pfd_terminate(void *sockdata
);
295 extern int pfd_send(Socket s
, char *data
, int len
);
296 extern void pfd_confirm(Socket s
);
297 extern void pfd_unthrottle(Socket s
);
298 extern void pfd_override_throttle(Socket s
, int enable
);
300 /* Exports from x11fwd.c */
301 extern const char *x11_init(Socket
*, char *, void *, void *, const char *,
302 int, const Config
*);
303 extern void x11_close(Socket
);
304 extern int x11_send(Socket
, char *, int);
305 extern void *x11_invent_auth(char *, int, char *, int, int);
306 extern void x11_free_auth(void *);
307 extern void x11_unthrottle(Socket s
);
308 extern void x11_override_throttle(Socket s
, int enable
);
309 extern int x11_get_screen_number(char *display
);
310 void x11_get_real_auth(void *authv
, char *display
);
311 char *x11_display(const char *display
);
313 /* Platform-dependent X11 functions */
314 extern void platform_get_x11_auth(char *display
, int *proto
,
315 unsigned char *data
, int *datalen
);
316 extern const char platform_x11_best_transport
[];
317 /* best X11 hostname for this platform if none specified */
318 SockAddr
platform_get_x11_unix_address(int displaynum
, char **canonicalname
);
319 /* make up a SockAddr naming the address for displaynum */
320 char *platform_get_x_display(void);
321 /* allocated local X display string, if any */
323 Bignum
copybn(Bignum b
);
324 Bignum
bn_power_2(int n
);
325 void bn_restore_invariant(Bignum b
);
326 Bignum
bignum_from_long(unsigned long n
);
327 void freebn(Bignum b
);
328 Bignum
modpow(Bignum base
, Bignum exp
, Bignum mod
);
329 Bignum
modmul(Bignum a
, Bignum b
, Bignum mod
);
330 void decbn(Bignum n
);
331 extern Bignum Zero
, One
;
332 Bignum
bignum_from_bytes(const unsigned char *data
, int nbytes
);
333 int ssh1_read_bignum(const unsigned char *data
, int len
, Bignum
* result
);
334 int bignum_bitcount(Bignum bn
);
335 int ssh1_bignum_length(Bignum bn
);
336 int ssh2_bignum_length(Bignum bn
);
337 int bignum_byte(Bignum bn
, int i
);
338 int bignum_bit(Bignum bn
, int i
);
339 void bignum_set_bit(Bignum bn
, int i
, int value
);
340 int ssh1_write_bignum(void *data
, Bignum bn
);
341 Bignum
biggcd(Bignum a
, Bignum b
);
342 unsigned short bignum_mod_short(Bignum number
, unsigned short modulus
);
343 Bignum
bignum_add_long(Bignum number
, unsigned long addend
);
344 Bignum
bigmul(Bignum a
, Bignum b
);
345 Bignum
bigmuladd(Bignum a
, Bignum b
, Bignum addend
);
346 Bignum
bigdiv(Bignum a
, Bignum b
);
347 Bignum
bigmod(Bignum a
, Bignum b
);
348 Bignum
modinv(Bignum number
, Bignum modulus
);
349 Bignum
bignum_bitmask(Bignum number
);
350 Bignum
bignum_rshift(Bignum number
, int shift
);
351 int bignum_cmp(Bignum a
, Bignum b
);
352 char *bignum_decimal(Bignum x
);
355 void diagbn(char *prefix
, Bignum md
);
358 void *dh_setup_group(const struct ssh_kex
*kex
);
359 void *dh_setup_gex(Bignum pval
, Bignum gval
);
360 void dh_cleanup(void *);
361 Bignum
dh_create_e(void *, int nbits
);
362 Bignum
dh_find_K(void *, Bignum f
);
364 int loadrsakey(const Filename
*filename
, struct RSAKey
*key
,
365 char *passphrase
, const char **errorstr
);
366 int rsakey_encrypted(const Filename
*filename
, char **comment
);
367 int rsakey_pubblob(const Filename
*filename
, void **blob
, int *bloblen
,
368 const char **errorstr
);
370 int saversakey(const Filename
*filename
, struct RSAKey
*key
, char *passphrase
);
372 extern int base64_decode_atom(char *atom
, unsigned char *out
);
373 extern int base64_lines(int datalen
);
374 extern void base64_encode_atom(unsigned char *data
, int n
, char *out
);
375 extern void base64_encode(FILE *fp
, unsigned char *data
, int datalen
, int cpl
);
377 /* ssh2_load_userkey can return this as an error */
378 extern struct ssh2_userkey ssh2_wrong_passphrase
;
379 #define SSH2_WRONG_PASSPHRASE (&ssh2_wrong_passphrase)
381 int ssh2_userkey_encrypted(const Filename
*filename
, char **comment
);
382 struct ssh2_userkey
*ssh2_load_userkey(const Filename
*filename
,
383 char *passphrase
, const char **errorstr
);
384 char *ssh2_userkey_loadpub(const Filename
*filename
, char **algorithm
,
385 int *pub_blob_len
, const char **errorstr
);
386 int ssh2_save_userkey(const Filename
*filename
, struct ssh2_userkey
*key
,
388 const struct ssh_signkey
*find_pubkey_alg(const char *name
);
391 SSH_KEYTYPE_UNOPENABLE
,
393 SSH_KEYTYPE_SSH1
, SSH_KEYTYPE_SSH2
,
394 SSH_KEYTYPE_OPENSSH
, SSH_KEYTYPE_SSHCOM
396 int key_type(const Filename
*filename
);
397 char *key_type_to_str(int type
);
399 int import_possible(int type
);
400 int import_target_type(int type
);
401 int import_encrypted(const Filename
*filename
, int type
, char **comment
);
402 int import_ssh1(const Filename
*filename
, int type
,
403 struct RSAKey
*key
, char *passphrase
, const char **errmsg_p
);
404 struct ssh2_userkey
*import_ssh2(const Filename
*filename
, int type
,
405 char *passphrase
, const char **errmsg_p
);
406 int export_ssh1(const Filename
*filename
, int type
,
407 struct RSAKey
*key
, char *passphrase
);
408 int export_ssh2(const Filename
*filename
, int type
,
409 struct ssh2_userkey
*key
, char *passphrase
);
411 void des3_decrypt_pubkey(unsigned char *key
, unsigned char *blk
, int len
);
412 void des3_encrypt_pubkey(unsigned char *key
, unsigned char *blk
, int len
);
413 void des3_decrypt_pubkey_ossh(unsigned char *key
, unsigned char *iv
,
414 unsigned char *blk
, int len
);
415 void des3_encrypt_pubkey_ossh(unsigned char *key
, unsigned char *iv
,
416 unsigned char *blk
, int len
);
417 void aes256_encrypt_pubkey(unsigned char *key
, unsigned char *blk
,
419 void aes256_decrypt_pubkey(unsigned char *key
, unsigned char *blk
,
422 void des_encrypt_xdmauth(unsigned char *key
, unsigned char *blk
, int len
);
423 void des_decrypt_xdmauth(unsigned char *key
, unsigned char *blk
, int len
);
426 * For progress updates in the key generation utility.
428 #define PROGFN_INITIALISE 1
429 #define PROGFN_LIN_PHASE 2
430 #define PROGFN_EXP_PHASE 3
431 #define PROGFN_PHASE_EXTENT 4
432 #define PROGFN_READY 5
433 #define PROGFN_PROGRESS 6
434 typedef void (*progfn_t
) (void *param
, int action
, int phase
, int progress
);
436 int rsa_generate(struct RSAKey
*key
, int bits
, progfn_t pfn
,
438 int dsa_generate(struct dss_key
*key
, int bits
, progfn_t pfn
,
440 Bignum
primegen(int bits
, int modulus
, int residue
, Bignum factor
,
441 int phase
, progfn_t pfn
, void *pfnparam
);
447 void *zlib_compress_init(void);
448 void zlib_compress_cleanup(void *);
449 void *zlib_decompress_init(void);
450 void zlib_decompress_cleanup(void *);
451 int zlib_compress_block(void *, unsigned char *block
, int len
,
452 unsigned char **outblock
, int *outlen
);
453 int zlib_decompress_block(void *, unsigned char *block
, int len
,
454 unsigned char **outblock
, int *outlen
);
457 * SSH-1 agent messages.
459 #define SSH1_AGENTC_REQUEST_RSA_IDENTITIES 1
460 #define SSH1_AGENT_RSA_IDENTITIES_ANSWER 2
461 #define SSH1_AGENTC_RSA_CHALLENGE 3
462 #define SSH1_AGENT_RSA_RESPONSE 4
463 #define SSH1_AGENTC_ADD_RSA_IDENTITY 7
464 #define SSH1_AGENTC_REMOVE_RSA_IDENTITY 8
465 #define SSH1_AGENTC_REMOVE_ALL_RSA_IDENTITIES 9 /* openssh private? */
468 * Messages common to SSH-1 and OpenSSH's SSH-2.
470 #define SSH_AGENT_FAILURE 5
471 #define SSH_AGENT_SUCCESS 6
474 * OpenSSH's SSH-2 agent messages.
476 #define SSH2_AGENTC_REQUEST_IDENTITIES 11
477 #define SSH2_AGENT_IDENTITIES_ANSWER 12
478 #define SSH2_AGENTC_SIGN_REQUEST 13
479 #define SSH2_AGENT_SIGN_RESPONSE 14
480 #define SSH2_AGENTC_ADD_IDENTITY 17
481 #define SSH2_AGENTC_REMOVE_IDENTITY 18
482 #define SSH2_AGENTC_REMOVE_ALL_IDENTITIES 19
485 * Need this to warn about support for the original SSH-2 keyfile
488 void old_keyfile_warning(void);