12 extern void sshfwd_close(struct ssh_channel
*c
);
13 extern int sshfwd_write(struct ssh_channel
*c
, char *, int);
14 extern void sshfwd_unthrottle(struct ssh_channel
*c
, int bufsize
);
20 #define lenof(x) ( (sizeof((x))) / (sizeof(*(x))))
23 #define SSH_CIPHER_IDEA 1
24 #define SSH_CIPHER_DES 2
25 #define SSH_CIPHER_3DES 3
26 #define SSH_CIPHER_BLOWFISH 6
34 #ifndef BIGNUM_INTERNAL
42 unsigned long exponent
;
43 unsigned char *modulus
;
47 Bignum private_exponent
;
59 int makekey(unsigned char *data
, int len
, struct RSAKey
*result
,
60 unsigned char **keystr
, int order
);
61 int makeprivate(unsigned char *data
, int len
, struct RSAKey
*result
);
62 int rsaencrypt(unsigned char *data
, int length
, struct RSAKey
*key
);
63 Bignum
rsadecrypt(Bignum input
, struct RSAKey
*key
);
64 void rsasign(unsigned char *data
, int length
, struct RSAKey
*key
);
65 void rsasanitise(struct RSAKey
*key
);
66 int rsastr_len(struct RSAKey
*key
);
67 void rsastr_fmt(char *str
, struct RSAKey
*key
);
68 void rsa_fingerprint(char *str
, int len
, struct RSAKey
*key
);
69 int rsa_verify(struct RSAKey
*key
);
70 unsigned char *rsa_public_blob(struct RSAKey
*key
, int *len
);
71 int rsa_public_blob_len(void *data
, int maxlen
);
72 void freersakey(struct RSAKey
*key
);
74 typedef unsigned int word32
;
75 typedef unsigned int uint32
;
77 unsigned long crc32_compute(const void *s
, size_t len
);
78 unsigned long crc32_update(unsigned long crc_input
, const void *s
, size_t len
);
80 /* SSH CRC compensation attack detector */
81 void *crcda_make_context(void);
82 void crcda_free_context(void *handle
);
83 int detect_attack(void *handle
, unsigned char *buf
, uint32 len
,
87 * SSH2 RSA key exchange functions
90 void *ssh_rsakex_newkey(char *data
, int len
);
91 void ssh_rsakex_freekey(void *key
);
92 int ssh_rsakex_klen(void *key
);
93 void ssh_rsakex_encrypt(const struct ssh_hash
*h
, unsigned char *in
, int inlen
,
94 unsigned char *out
, int outlen
,
106 unsigned char block
[64];
112 void MD5Init(struct MD5Context
*context
);
113 void MD5Update(struct MD5Context
*context
, unsigned char const *buf
,
115 void MD5Final(unsigned char digest
[16], struct MD5Context
*context
);
116 void MD5Simple(void const *p
, unsigned len
, unsigned char output
[16]);
118 void *hmacmd5_make_context(void);
119 void hmacmd5_free_context(void *handle
);
120 void hmacmd5_key(void *handle
, void const *key
, int len
);
121 void hmacmd5_do_hmac(void *handle
, unsigned char const *blk
, int len
,
122 unsigned char *hmac
);
126 unsigned char block
[64];
130 void SHA_Init(SHA_State
* s
);
131 void SHA_Bytes(SHA_State
* s
, void *p
, int len
);
132 void SHA_Final(SHA_State
* s
, unsigned char *output
);
133 void SHA_Simple(void *p
, int len
, unsigned char *output
);
135 void hmac_sha1_simple(void *key
, int keylen
, void *data
, int datalen
,
136 unsigned char *output
);
139 unsigned char block
[64];
143 void SHA256_Init(SHA256_State
* s
);
144 void SHA256_Bytes(SHA256_State
* s
, const void *p
, int len
);
145 void SHA256_Final(SHA256_State
* s
, unsigned char *output
);
146 void SHA256_Simple(const void *p
, int len
, unsigned char *output
);
150 unsigned char block
[128];
154 void SHA512_Init(SHA512_State
* s
);
155 void SHA512_Bytes(SHA512_State
* s
, const void *p
, int len
);
156 void SHA512_Final(SHA512_State
* s
, unsigned char *output
);
157 void SHA512_Simple(const void *p
, int len
, unsigned char *output
);
160 void *(*make_context
)(void);
161 void (*free_context
)(void *);
162 void (*sesskey
) (void *, unsigned char *key
); /* for SSH-1 */
163 void (*encrypt
) (void *, unsigned char *blk
, int len
);
164 void (*decrypt
) (void *, unsigned char *blk
, int len
);
170 void *(*make_context
)(void);
171 void (*free_context
)(void *);
172 void (*setiv
) (void *, unsigned char *key
); /* for SSH-2 */
173 void (*setkey
) (void *, unsigned char *key
);/* for SSH-2 */
174 void (*encrypt
) (void *, unsigned char *blk
, int len
);
175 void (*decrypt
) (void *, unsigned char *blk
, int len
);
180 #define SSH_CIPHER_IS_CBC 1
184 struct ssh2_ciphers
{
186 const struct ssh2_cipher
*const *list
;
190 void *(*make_context
)(void);
191 void (*free_context
)(void *);
192 void (*setkey
) (void *, unsigned char *key
);
193 void (*generate
) (void *, unsigned char *blk
, int len
, unsigned long seq
);
194 int (*verify
) (void *, unsigned char *blk
, int len
, unsigned long seq
);
201 void *(*init
)(void); /* also allocates context */
202 void (*bytes
)(void *, void *, int);
203 void (*final
)(void *, unsigned char *); /* also frees context */
204 int hlen
; /* output length in bytes */
209 char *name
, *groupname
;
210 enum { KEXTYPE_DH
, KEXTYPE_RSA
} main_type
;
212 const unsigned char *pdata
, *gdata
; /* NULL means group exchange */
214 const struct ssh_hash
*hash
;
219 const struct ssh_kex
*const *list
;
223 void *(*newkey
) (char *data
, int len
);
224 void (*freekey
) (void *key
);
225 char *(*fmtkey
) (void *key
);
226 unsigned char *(*public_blob
) (void *key
, int *len
);
227 unsigned char *(*private_blob
) (void *key
, int *len
);
228 void *(*createkey
) (unsigned char *pub_blob
, int pub_len
,
229 unsigned char *priv_blob
, int priv_len
);
230 void *(*openssh_createkey
) (unsigned char **blob
, int *len
);
231 int (*openssh_fmtkey
) (void *key
, unsigned char *blob
, int len
);
232 int (*pubkey_bits
) (void *blob
, int len
);
233 char *(*fingerprint
) (void *key
);
234 int (*verifysig
) (void *key
, char *sig
, int siglen
,
235 char *data
, int datalen
);
236 unsigned char *(*sign
) (void *key
, char *data
, int datalen
,
239 char *keytype
; /* for host key cache */
242 struct ssh_compress
{
244 void *(*compress_init
) (void);
245 void (*compress_cleanup
) (void *);
246 int (*compress
) (void *, unsigned char *block
, int len
,
247 unsigned char **outblock
, int *outlen
);
248 void *(*decompress_init
) (void);
249 void (*decompress_cleanup
) (void *);
250 int (*decompress
) (void *, unsigned char *block
, int len
,
251 unsigned char **outblock
, int *outlen
);
252 int (*disable_compression
) (void *);
256 struct ssh2_userkey
{
257 const struct ssh_signkey
*alg
; /* the key algorithm */
258 void *data
; /* the key data */
259 char *comment
; /* the key comment */
262 /* The maximum length of any hash algorithm used in kex. (bytes) */
263 #define SSH2_KEX_MAX_HASH_LEN (32) /* SHA-256 */
265 extern const struct ssh_cipher ssh_3des
;
266 extern const struct ssh_cipher ssh_des
;
267 extern const struct ssh_cipher ssh_blowfish_ssh1
;
268 extern const struct ssh2_ciphers ssh2_3des
;
269 extern const struct ssh2_ciphers ssh2_des
;
270 extern const struct ssh2_ciphers ssh2_aes
;
271 extern const struct ssh2_ciphers ssh2_blowfish
;
272 extern const struct ssh2_ciphers ssh2_arcfour
;
273 extern const struct ssh_hash ssh_sha1
;
274 extern const struct ssh_hash ssh_sha256
;
275 extern const struct ssh_kexes ssh_diffiehellman_group1
;
276 extern const struct ssh_kexes ssh_diffiehellman_group14
;
277 extern const struct ssh_kexes ssh_diffiehellman_gex
;
278 extern const struct ssh_kexes ssh_rsa_kex
;
279 extern const struct ssh_signkey ssh_dss
;
280 extern const struct ssh_signkey ssh_rsa
;
281 extern const struct ssh_mac ssh_hmac_md5
;
282 extern const struct ssh_mac ssh_hmac_sha1
;
283 extern const struct ssh_mac ssh_hmac_sha1_buggy
;
284 extern const struct ssh_mac ssh_hmac_sha1_96
;
285 extern const struct ssh_mac ssh_hmac_sha1_96_buggy
;
289 * PuTTY version number formatted as an SSH version string.
291 extern char sshver
[];
294 * Gross hack: pscp will try to start SFTP but fall back to scp1 if
295 * that fails. This variable is the means by which scp.c can reach
296 * into the SSH code and find out which one it got.
298 extern int ssh_fallback_cmd(void *handle
);
301 void SHATransform(word32
* digest
, word32
* data
);
304 int random_byte(void);
305 void random_add_noise(void *noise
, int length
);
306 void random_add_heavynoise(void *noise
, int length
);
308 void logevent(void *, const char *);
310 /* Allocate and register a new channel for port forwarding */
311 void *new_sock_channel(void *handle
, Socket s
);
312 void ssh_send_port_open(void *channel
, char *hostname
, int port
, char *org
);
314 /* Exports from portfwd.c */
315 extern const char *pfd_newconnect(Socket
* s
, char *hostname
, int port
,
316 void *c
, const Config
*cfg
,
318 /* desthost == NULL indicates dynamic (SOCKS) port forwarding */
319 extern const char *pfd_addforward(char *desthost
, int destport
, char *srcaddr
,
320 int port
, void *backhandle
,
321 const Config
*cfg
, void **sockdata
,
323 extern void pfd_close(Socket s
);
324 extern void pfd_terminate(void *sockdata
);
325 extern int pfd_send(Socket s
, char *data
, int len
);
326 extern void pfd_confirm(Socket s
);
327 extern void pfd_unthrottle(Socket s
);
328 extern void pfd_override_throttle(Socket s
, int enable
);
330 /* Exports from x11fwd.c */
332 X11_TRANS_IPV4
= 0, X11_TRANS_IPV6
= 6, X11_TRANS_UNIX
= 256
335 /* Broken-down components of the display name itself */
340 /* OSX sometimes replaces all the above with a full Unix-socket pathname */
341 char *unixsocketpath
;
343 /* PuTTY networking SockAddr to connect to the display, and associated
349 /* Auth details we invented for the virtual display on the SSH server. */
351 unsigned char *remoteauthdata
;
352 int remoteauthdatalen
;
353 char *remoteauthprotoname
;
354 char *remoteauthdatastring
;
356 /* Our local auth details for talking to the real X display. */
358 unsigned char *localauthdata
;
359 int localauthdatalen
;
362 * Used inside x11fwd.c to remember recently seen
363 * XDM-AUTHORIZATION-1 strings, to avoid replay attacks.
368 * x11_setup_display() parses the display variable and fills in an
369 * X11Display structure. Some remote auth details are invented;
370 * the supplied authtype parameter configures the preferred
371 * authorisation protocol to use at the remote end. The local auth
372 * details are looked up by calling platform_get_x11_auth.
374 extern struct X11Display
*x11_setup_display(char *display
, int authtype
,
376 void x11_free_display(struct X11Display
*disp
);
377 extern const char *x11_init(Socket
*, struct X11Display
*, void *,
378 const char *, int, const Config
*);
379 extern void x11_close(Socket
);
380 extern int x11_send(Socket
, char *, int);
381 extern void x11_unthrottle(Socket s
);
382 extern void x11_override_throttle(Socket s
, int enable
);
383 char *x11_display(const char *display
);
384 /* Platform-dependent X11 functions */
385 extern void platform_get_x11_auth(struct X11Display
*display
,
387 /* examine a mostly-filled-in X11Display and fill in localauth* */
388 extern const int platform_uses_x11_unix_by_default
;
389 /* choose default X transport in the absence of a specified one */
390 SockAddr
platform_get_x11_unix_address(const char *path
, int displaynum
);
391 /* make up a SockAddr naming the address for displaynum */
392 char *platform_get_x_display(void);
393 /* allocated local X display string, if any */
394 /* Callbacks in x11.c usable _by_ platform X11 functions */
396 * This function does the job of platform_get_x11_auth, provided
397 * it is told where to find a normally formatted .Xauthority file:
398 * it opens that file, parses it to find an auth record which
399 * matches the display details in "display", and fills in the
402 * It is expected that most implementations of
403 * platform_get_x11_auth() will work by finding their system's
404 * .Xauthority file, adjusting the display details if necessary
405 * for local oddities like Unix-domain socket transport, and
406 * calling this function to do the rest of the work.
408 void x11_get_auth_from_authfile(struct X11Display
*display
,
409 const char *authfilename
);
411 Bignum
copybn(Bignum b
);
412 Bignum
bn_power_2(int n
);
413 void bn_restore_invariant(Bignum b
);
414 Bignum
bignum_from_long(unsigned long n
);
415 void freebn(Bignum b
);
416 Bignum
modpow(Bignum base
, Bignum exp
, Bignum mod
);
417 Bignum
modmul(Bignum a
, Bignum b
, Bignum mod
);
418 void decbn(Bignum n
);
419 extern Bignum Zero
, One
;
420 Bignum
bignum_from_bytes(const unsigned char *data
, int nbytes
);
421 int ssh1_read_bignum(const unsigned char *data
, int len
, Bignum
* result
);
422 int bignum_bitcount(Bignum bn
);
423 int ssh1_bignum_length(Bignum bn
);
424 int ssh2_bignum_length(Bignum bn
);
425 int bignum_byte(Bignum bn
, int i
);
426 int bignum_bit(Bignum bn
, int i
);
427 void bignum_set_bit(Bignum bn
, int i
, int value
);
428 int ssh1_write_bignum(void *data
, Bignum bn
);
429 Bignum
biggcd(Bignum a
, Bignum b
);
430 unsigned short bignum_mod_short(Bignum number
, unsigned short modulus
);
431 Bignum
bignum_add_long(Bignum number
, unsigned long addend
);
432 Bignum
bigmul(Bignum a
, Bignum b
);
433 Bignum
bigmuladd(Bignum a
, Bignum b
, Bignum addend
);
434 Bignum
bigdiv(Bignum a
, Bignum b
);
435 Bignum
bigmod(Bignum a
, Bignum b
);
436 Bignum
modinv(Bignum number
, Bignum modulus
);
437 Bignum
bignum_bitmask(Bignum number
);
438 Bignum
bignum_rshift(Bignum number
, int shift
);
439 int bignum_cmp(Bignum a
, Bignum b
);
440 char *bignum_decimal(Bignum x
);
443 void diagbn(char *prefix
, Bignum md
);
446 void *dh_setup_group(const struct ssh_kex
*kex
);
447 void *dh_setup_gex(Bignum pval
, Bignum gval
);
448 void dh_cleanup(void *);
449 Bignum
dh_create_e(void *, int nbits
);
450 Bignum
dh_find_K(void *, Bignum f
);
452 int loadrsakey(const Filename
*filename
, struct RSAKey
*key
,
453 char *passphrase
, const char **errorstr
);
454 int rsakey_encrypted(const Filename
*filename
, char **comment
);
455 int rsakey_pubblob(const Filename
*filename
, void **blob
, int *bloblen
,
456 char **commentptr
, const char **errorstr
);
458 int saversakey(const Filename
*filename
, struct RSAKey
*key
, char *passphrase
);
460 extern int base64_decode_atom(char *atom
, unsigned char *out
);
461 extern int base64_lines(int datalen
);
462 extern void base64_encode_atom(unsigned char *data
, int n
, char *out
);
463 extern void base64_encode(FILE *fp
, unsigned char *data
, int datalen
, int cpl
);
465 /* ssh2_load_userkey can return this as an error */
466 extern struct ssh2_userkey ssh2_wrong_passphrase
;
467 #define SSH2_WRONG_PASSPHRASE (&ssh2_wrong_passphrase)
469 int ssh2_userkey_encrypted(const Filename
*filename
, char **comment
);
470 struct ssh2_userkey
*ssh2_load_userkey(const Filename
*filename
,
471 char *passphrase
, const char **errorstr
);
472 unsigned char *ssh2_userkey_loadpub(const Filename
*filename
, char **algorithm
,
473 int *pub_blob_len
, char **commentptr
,
474 const char **errorstr
);
475 int ssh2_save_userkey(const Filename
*filename
, struct ssh2_userkey
*key
,
477 const struct ssh_signkey
*find_pubkey_alg(const char *name
);
480 SSH_KEYTYPE_UNOPENABLE
,
482 SSH_KEYTYPE_SSH1
, SSH_KEYTYPE_SSH2
,
483 SSH_KEYTYPE_OPENSSH
, SSH_KEYTYPE_SSHCOM
485 int key_type(const Filename
*filename
);
486 char *key_type_to_str(int type
);
488 int import_possible(int type
);
489 int import_target_type(int type
);
490 int import_encrypted(const Filename
*filename
, int type
, char **comment
);
491 int import_ssh1(const Filename
*filename
, int type
,
492 struct RSAKey
*key
, char *passphrase
, const char **errmsg_p
);
493 struct ssh2_userkey
*import_ssh2(const Filename
*filename
, int type
,
494 char *passphrase
, const char **errmsg_p
);
495 int export_ssh1(const Filename
*filename
, int type
,
496 struct RSAKey
*key
, char *passphrase
);
497 int export_ssh2(const Filename
*filename
, int type
,
498 struct ssh2_userkey
*key
, char *passphrase
);
500 void des3_decrypt_pubkey(unsigned char *key
, unsigned char *blk
, int len
);
501 void des3_encrypt_pubkey(unsigned char *key
, unsigned char *blk
, int len
);
502 void des3_decrypt_pubkey_ossh(unsigned char *key
, unsigned char *iv
,
503 unsigned char *blk
, int len
);
504 void des3_encrypt_pubkey_ossh(unsigned char *key
, unsigned char *iv
,
505 unsigned char *blk
, int len
);
506 void aes256_encrypt_pubkey(unsigned char *key
, unsigned char *blk
,
508 void aes256_decrypt_pubkey(unsigned char *key
, unsigned char *blk
,
511 void des_encrypt_xdmauth(unsigned char *key
, unsigned char *blk
, int len
);
512 void des_decrypt_xdmauth(unsigned char *key
, unsigned char *blk
, int len
);
515 * For progress updates in the key generation utility.
517 #define PROGFN_INITIALISE 1
518 #define PROGFN_LIN_PHASE 2
519 #define PROGFN_EXP_PHASE 3
520 #define PROGFN_PHASE_EXTENT 4
521 #define PROGFN_READY 5
522 #define PROGFN_PROGRESS 6
523 typedef void (*progfn_t
) (void *param
, int action
, int phase
, int progress
);
525 int rsa_generate(struct RSAKey
*key
, int bits
, progfn_t pfn
,
527 int dsa_generate(struct dss_key
*key
, int bits
, progfn_t pfn
,
529 Bignum
primegen(int bits
, int modulus
, int residue
, Bignum factor
,
530 int phase
, progfn_t pfn
, void *pfnparam
);
536 void *zlib_compress_init(void);
537 void zlib_compress_cleanup(void *);
538 void *zlib_decompress_init(void);
539 void zlib_decompress_cleanup(void *);
540 int zlib_compress_block(void *, unsigned char *block
, int len
,
541 unsigned char **outblock
, int *outlen
);
542 int zlib_decompress_block(void *, unsigned char *block
, int len
,
543 unsigned char **outblock
, int *outlen
);
546 * SSH-1 agent messages.
548 #define SSH1_AGENTC_REQUEST_RSA_IDENTITIES 1
549 #define SSH1_AGENT_RSA_IDENTITIES_ANSWER 2
550 #define SSH1_AGENTC_RSA_CHALLENGE 3
551 #define SSH1_AGENT_RSA_RESPONSE 4
552 #define SSH1_AGENTC_ADD_RSA_IDENTITY 7
553 #define SSH1_AGENTC_REMOVE_RSA_IDENTITY 8
554 #define SSH1_AGENTC_REMOVE_ALL_RSA_IDENTITIES 9 /* openssh private? */
557 * Messages common to SSH-1 and OpenSSH's SSH-2.
559 #define SSH_AGENT_FAILURE 5
560 #define SSH_AGENT_SUCCESS 6
563 * OpenSSH's SSH-2 agent messages.
565 #define SSH2_AGENTC_REQUEST_IDENTITIES 11
566 #define SSH2_AGENT_IDENTITIES_ANSWER 12
567 #define SSH2_AGENTC_SIGN_REQUEST 13
568 #define SSH2_AGENT_SIGN_RESPONSE 14
569 #define SSH2_AGENTC_ADD_IDENTITY 17
570 #define SSH2_AGENTC_REMOVE_IDENTITY 18
571 #define SSH2_AGENTC_REMOVE_ALL_IDENTITIES 19
574 * Need this to warn about support for the original SSH-2 keyfile
577 void old_keyfile_warning(void);