12 extern int sshfwd_write(struct ssh_channel
*c
, char *, int);
13 extern void sshfwd_write_eof(struct ssh_channel
*c
);
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 #ifndef PUTTY_UINT32_DEFINED
75 /* This makes assumptions about the int type. */
76 typedef unsigned int uint32
;
77 #define PUTTY_UINT32_DEFINED
79 typedef uint32 word32
;
81 unsigned long crc32_compute(const void *s
, size_t len
);
82 unsigned long crc32_update(unsigned long crc_input
, const void *s
, size_t len
);
84 /* SSH CRC compensation attack detector */
85 void *crcda_make_context(void);
86 void crcda_free_context(void *handle
);
87 int detect_attack(void *handle
, unsigned char *buf
, uint32 len
,
91 * SSH2 RSA key exchange functions
94 void *ssh_rsakex_newkey(char *data
, int len
);
95 void ssh_rsakex_freekey(void *key
);
96 int ssh_rsakex_klen(void *key
);
97 void ssh_rsakex_encrypt(const struct ssh_hash
*h
, unsigned char *in
, int inlen
,
98 unsigned char *out
, int outlen
,
110 unsigned char block
[64];
116 void MD5Init(struct MD5Context
*context
);
117 void MD5Update(struct MD5Context
*context
, unsigned char const *buf
,
119 void MD5Final(unsigned char digest
[16], struct MD5Context
*context
);
120 void MD5Simple(void const *p
, unsigned len
, unsigned char output
[16]);
122 void *hmacmd5_make_context(void);
123 void hmacmd5_free_context(void *handle
);
124 void hmacmd5_key(void *handle
, void const *key
, int len
);
125 void hmacmd5_do_hmac(void *handle
, unsigned char const *blk
, int len
,
126 unsigned char *hmac
);
130 unsigned char block
[64];
134 void SHA_Init(SHA_State
* s
);
135 void SHA_Bytes(SHA_State
* s
, void *p
, int len
);
136 void SHA_Final(SHA_State
* s
, unsigned char *output
);
137 void SHA_Simple(void *p
, int len
, unsigned char *output
);
139 void hmac_sha1_simple(void *key
, int keylen
, void *data
, int datalen
,
140 unsigned char *output
);
143 unsigned char block
[64];
147 void SHA256_Init(SHA256_State
* s
);
148 void SHA256_Bytes(SHA256_State
* s
, const void *p
, int len
);
149 void SHA256_Final(SHA256_State
* s
, unsigned char *output
);
150 void SHA256_Simple(const void *p
, int len
, unsigned char *output
);
154 unsigned char block
[128];
158 void SHA512_Init(SHA512_State
* s
);
159 void SHA512_Bytes(SHA512_State
* s
, const void *p
, int len
);
160 void SHA512_Final(SHA512_State
* s
, unsigned char *output
);
161 void SHA512_Simple(const void *p
, int len
, unsigned char *output
);
164 void *(*make_context
)(void);
165 void (*free_context
)(void *);
166 void (*sesskey
) (void *, unsigned char *key
); /* for SSH-1 */
167 void (*encrypt
) (void *, unsigned char *blk
, int len
);
168 void (*decrypt
) (void *, unsigned char *blk
, int len
);
174 void *(*make_context
)(void);
175 void (*free_context
)(void *);
176 void (*setiv
) (void *, unsigned char *key
); /* for SSH-2 */
177 void (*setkey
) (void *, unsigned char *key
);/* for SSH-2 */
178 void (*encrypt
) (void *, unsigned char *blk
, int len
);
179 void (*decrypt
) (void *, unsigned char *blk
, int len
);
184 #define SSH_CIPHER_IS_CBC 1
188 struct ssh2_ciphers
{
190 const struct ssh2_cipher
*const *list
;
194 void *(*make_context
)(void);
195 void (*free_context
)(void *);
196 void (*setkey
) (void *, unsigned char *key
);
197 /* whole-packet operations */
198 void (*generate
) (void *, unsigned char *blk
, int len
, unsigned long seq
);
199 int (*verify
) (void *, unsigned char *blk
, int len
, unsigned long seq
);
200 /* partial-packet operations */
201 void (*start
) (void *);
202 void (*bytes
) (void *, unsigned char const *, int);
203 void (*genresult
) (void *, unsigned char *);
204 int (*verresult
) (void *, unsigned char const *);
211 void *(*init
)(void); /* also allocates context */
212 void (*bytes
)(void *, void *, int);
213 void (*final
)(void *, unsigned char *); /* also frees context */
214 int hlen
; /* output length in bytes */
219 char *name
, *groupname
;
220 enum { KEXTYPE_DH
, KEXTYPE_RSA
} main_type
;
222 const unsigned char *pdata
, *gdata
; /* NULL means group exchange */
224 const struct ssh_hash
*hash
;
229 const struct ssh_kex
*const *list
;
233 void *(*newkey
) (char *data
, int len
);
234 void (*freekey
) (void *key
);
235 char *(*fmtkey
) (void *key
);
236 unsigned char *(*public_blob
) (void *key
, int *len
);
237 unsigned char *(*private_blob
) (void *key
, int *len
);
238 void *(*createkey
) (unsigned char *pub_blob
, int pub_len
,
239 unsigned char *priv_blob
, int priv_len
);
240 void *(*openssh_createkey
) (unsigned char **blob
, int *len
);
241 int (*openssh_fmtkey
) (void *key
, unsigned char *blob
, int len
);
242 int (*pubkey_bits
) (void *blob
, int len
);
243 char *(*fingerprint
) (void *key
);
244 int (*verifysig
) (void *key
, char *sig
, int siglen
,
245 char *data
, int datalen
);
246 unsigned char *(*sign
) (void *key
, char *data
, int datalen
,
249 char *keytype
; /* for host key cache */
252 struct ssh_compress
{
254 /* For zlib@openssh.com: if non-NULL, this name will be considered once
255 * userauth has completed successfully. */
257 void *(*compress_init
) (void);
258 void (*compress_cleanup
) (void *);
259 int (*compress
) (void *, unsigned char *block
, int len
,
260 unsigned char **outblock
, int *outlen
);
261 void *(*decompress_init
) (void);
262 void (*decompress_cleanup
) (void *);
263 int (*decompress
) (void *, unsigned char *block
, int len
,
264 unsigned char **outblock
, int *outlen
);
265 int (*disable_compression
) (void *);
269 struct ssh2_userkey
{
270 const struct ssh_signkey
*alg
; /* the key algorithm */
271 void *data
; /* the key data */
272 char *comment
; /* the key comment */
275 /* The maximum length of any hash algorithm used in kex. (bytes) */
276 #define SSH2_KEX_MAX_HASH_LEN (32) /* SHA-256 */
278 extern const struct ssh_cipher ssh_3des
;
279 extern const struct ssh_cipher ssh_des
;
280 extern const struct ssh_cipher ssh_blowfish_ssh1
;
281 extern const struct ssh2_ciphers ssh2_3des
;
282 extern const struct ssh2_ciphers ssh2_des
;
283 extern const struct ssh2_ciphers ssh2_aes
;
284 extern const struct ssh2_ciphers ssh2_blowfish
;
285 extern const struct ssh2_ciphers ssh2_arcfour
;
286 extern const struct ssh_hash ssh_sha1
;
287 extern const struct ssh_hash ssh_sha256
;
288 extern const struct ssh_kexes ssh_diffiehellman_group1
;
289 extern const struct ssh_kexes ssh_diffiehellman_group14
;
290 extern const struct ssh_kexes ssh_diffiehellman_gex
;
291 extern const struct ssh_kexes ssh_rsa_kex
;
292 extern const struct ssh_signkey ssh_dss
;
293 extern const struct ssh_signkey ssh_rsa
;
294 extern const struct ssh_mac ssh_hmac_md5
;
295 extern const struct ssh_mac ssh_hmac_sha1
;
296 extern const struct ssh_mac ssh_hmac_sha1_buggy
;
297 extern const struct ssh_mac ssh_hmac_sha1_96
;
298 extern const struct ssh_mac ssh_hmac_sha1_96_buggy
;
300 void *aes_make_context(void);
301 void aes_free_context(void *handle
);
302 void aes128_key(void *handle
, unsigned char *key
);
303 void aes192_key(void *handle
, unsigned char *key
);
304 void aes256_key(void *handle
, unsigned char *key
);
305 void aes_iv(void *handle
, unsigned char *iv
);
306 void aes_ssh2_encrypt_blk(void *handle
, unsigned char *blk
, int len
);
307 void aes_ssh2_decrypt_blk(void *handle
, unsigned char *blk
, int len
);
310 * PuTTY version number formatted as an SSH version string.
312 extern char sshver
[];
315 * Gross hack: pscp will try to start SFTP but fall back to scp1 if
316 * that fails. This variable is the means by which scp.c can reach
317 * into the SSH code and find out which one it got.
319 extern int ssh_fallback_cmd(void *handle
);
322 void SHATransform(word32
* digest
, word32
* data
);
325 int random_byte(void);
326 void random_add_noise(void *noise
, int length
);
327 void random_add_heavynoise(void *noise
, int length
);
329 void logevent(void *, const char *);
331 /* Allocate and register a new channel for port forwarding */
332 void *new_sock_channel(void *handle
, Socket s
);
333 void ssh_send_port_open(void *channel
, char *hostname
, int port
, char *org
);
335 /* Exports from portfwd.c */
336 extern const char *pfd_newconnect(Socket
* s
, char *hostname
, int port
,
337 void *c
, Conf
*conf
, int addressfamily
);
338 /* desthost == NULL indicates dynamic (SOCKS) port forwarding */
339 extern const char *pfd_addforward(char *desthost
, int destport
, char *srcaddr
,
340 int port
, void *backhandle
, Conf
*conf
,
341 void **sockdata
, int address_family
);
342 extern void pfd_close(Socket s
);
343 extern void pfd_terminate(void *sockdata
);
344 extern int pfd_send(Socket s
, char *data
, int len
);
345 extern void pfd_send_eof(Socket s
);
346 extern void pfd_confirm(Socket s
);
347 extern void pfd_unthrottle(Socket s
);
348 extern void pfd_override_throttle(Socket s
, int enable
);
350 /* Exports from x11fwd.c */
352 X11_TRANS_IPV4
= 0, X11_TRANS_IPV6
= 6, X11_TRANS_UNIX
= 256
355 /* Broken-down components of the display name itself */
360 /* OSX sometimes replaces all the above with a full Unix-socket pathname */
361 char *unixsocketpath
;
363 /* PuTTY networking SockAddr to connect to the display, and associated
369 /* Auth details we invented for the virtual display on the SSH server. */
371 unsigned char *remoteauthdata
;
372 int remoteauthdatalen
;
373 char *remoteauthprotoname
;
374 char *remoteauthdatastring
;
376 /* Our local auth details for talking to the real X display. */
378 unsigned char *localauthdata
;
379 int localauthdatalen
;
382 * Used inside x11fwd.c to remember recently seen
383 * XDM-AUTHORIZATION-1 strings, to avoid replay attacks.
388 * x11_setup_display() parses the display variable and fills in an
389 * X11Display structure. Some remote auth details are invented;
390 * the supplied authtype parameter configures the preferred
391 * authorisation protocol to use at the remote end. The local auth
392 * details are looked up by calling platform_get_x11_auth.
394 extern struct X11Display
*x11_setup_display(char *display
, int authtype
,
396 void x11_free_display(struct X11Display
*disp
);
397 extern const char *x11_init(Socket
*, struct X11Display
*, void *,
398 const char *, int, Conf
*);
399 extern void x11_close(Socket
);
400 extern int x11_send(Socket
, char *, int);
401 extern void x11_send_eof(Socket s
);
402 extern void x11_unthrottle(Socket s
);
403 extern void x11_override_throttle(Socket s
, int enable
);
404 char *x11_display(const char *display
);
405 /* Platform-dependent X11 functions */
406 extern void platform_get_x11_auth(struct X11Display
*display
, Conf
*);
407 /* examine a mostly-filled-in X11Display and fill in localauth* */
408 extern const int platform_uses_x11_unix_by_default
;
409 /* choose default X transport in the absence of a specified one */
410 SockAddr
platform_get_x11_unix_address(const char *path
, int displaynum
);
411 /* make up a SockAddr naming the address for displaynum */
412 char *platform_get_x_display(void);
413 /* allocated local X display string, if any */
414 /* Callbacks in x11.c usable _by_ platform X11 functions */
416 * This function does the job of platform_get_x11_auth, provided
417 * it is told where to find a normally formatted .Xauthority file:
418 * it opens that file, parses it to find an auth record which
419 * matches the display details in "display", and fills in the
422 * It is expected that most implementations of
423 * platform_get_x11_auth() will work by finding their system's
424 * .Xauthority file, adjusting the display details if necessary
425 * for local oddities like Unix-domain socket transport, and
426 * calling this function to do the rest of the work.
428 void x11_get_auth_from_authfile(struct X11Display
*display
,
429 const char *authfilename
);
431 Bignum
copybn(Bignum b
);
432 Bignum
bn_power_2(int n
);
433 void bn_restore_invariant(Bignum b
);
434 Bignum
bignum_from_long(unsigned long n
);
435 void freebn(Bignum b
);
436 Bignum
modpow(Bignum base
, Bignum exp
, Bignum mod
);
437 Bignum
modmul(Bignum a
, Bignum b
, Bignum mod
);
438 void decbn(Bignum n
);
439 extern Bignum Zero
, One
;
440 Bignum
bignum_from_bytes(const unsigned char *data
, int nbytes
);
441 int ssh1_read_bignum(const unsigned char *data
, int len
, Bignum
* result
);
442 int bignum_bitcount(Bignum bn
);
443 int ssh1_bignum_length(Bignum bn
);
444 int ssh2_bignum_length(Bignum bn
);
445 int bignum_byte(Bignum bn
, int i
);
446 int bignum_bit(Bignum bn
, int i
);
447 void bignum_set_bit(Bignum bn
, int i
, int value
);
448 int ssh1_write_bignum(void *data
, Bignum bn
);
449 Bignum
biggcd(Bignum a
, Bignum b
);
450 unsigned short bignum_mod_short(Bignum number
, unsigned short modulus
);
451 Bignum
bignum_add_long(Bignum number
, unsigned long addend
);
452 Bignum
bigadd(Bignum a
, Bignum b
);
453 Bignum
bigsub(Bignum a
, Bignum b
);
454 Bignum
bigmul(Bignum a
, Bignum b
);
455 Bignum
bigmuladd(Bignum a
, Bignum b
, Bignum addend
);
456 Bignum
bigdiv(Bignum a
, Bignum b
);
457 Bignum
bigmod(Bignum a
, Bignum b
);
458 Bignum
modinv(Bignum number
, Bignum modulus
);
459 Bignum
bignum_bitmask(Bignum number
);
460 Bignum
bignum_rshift(Bignum number
, int shift
);
461 int bignum_cmp(Bignum a
, Bignum b
);
462 char *bignum_decimal(Bignum x
);
465 void diagbn(char *prefix
, Bignum md
);
468 void *dh_setup_group(const struct ssh_kex
*kex
);
469 void *dh_setup_gex(Bignum pval
, Bignum gval
);
470 void dh_cleanup(void *);
471 Bignum
dh_create_e(void *, int nbits
);
472 Bignum
dh_find_K(void *, Bignum f
);
474 int loadrsakey(const Filename
*filename
, struct RSAKey
*key
,
475 char *passphrase
, const char **errorstr
);
476 int rsakey_encrypted(const Filename
*filename
, char **comment
);
477 int rsakey_pubblob(const Filename
*filename
, void **blob
, int *bloblen
,
478 char **commentptr
, const char **errorstr
);
480 int saversakey(const Filename
*filename
, struct RSAKey
*key
, char *passphrase
);
482 extern int base64_decode_atom(char *atom
, unsigned char *out
);
483 extern int base64_lines(int datalen
);
484 extern void base64_encode_atom(unsigned char *data
, int n
, char *out
);
485 extern void base64_encode(FILE *fp
, unsigned char *data
, int datalen
, int cpl
);
487 /* ssh2_load_userkey can return this as an error */
488 extern struct ssh2_userkey ssh2_wrong_passphrase
;
489 #define SSH2_WRONG_PASSPHRASE (&ssh2_wrong_passphrase)
491 int ssh2_userkey_encrypted(const Filename
*filename
, char **comment
);
492 struct ssh2_userkey
*ssh2_load_userkey(const Filename
*filename
,
493 char *passphrase
, const char **errorstr
);
494 unsigned char *ssh2_userkey_loadpub(const Filename
*filename
, char **algorithm
,
495 int *pub_blob_len
, char **commentptr
,
496 const char **errorstr
);
497 int ssh2_save_userkey(const Filename
*filename
, struct ssh2_userkey
*key
,
499 const struct ssh_signkey
*find_pubkey_alg(const char *name
);
502 SSH_KEYTYPE_UNOPENABLE
,
504 SSH_KEYTYPE_SSH1
, SSH_KEYTYPE_SSH2
,
505 SSH_KEYTYPE_OPENSSH
, SSH_KEYTYPE_SSHCOM
507 int key_type(const Filename
*filename
);
508 char *key_type_to_str(int type
);
510 int import_possible(int type
);
511 int import_target_type(int type
);
512 int import_encrypted(const Filename
*filename
, int type
, char **comment
);
513 int import_ssh1(const Filename
*filename
, int type
,
514 struct RSAKey
*key
, char *passphrase
, const char **errmsg_p
);
515 struct ssh2_userkey
*import_ssh2(const Filename
*filename
, int type
,
516 char *passphrase
, const char **errmsg_p
);
517 int export_ssh1(const Filename
*filename
, int type
,
518 struct RSAKey
*key
, char *passphrase
);
519 int export_ssh2(const Filename
*filename
, int type
,
520 struct ssh2_userkey
*key
, char *passphrase
);
522 void des3_decrypt_pubkey(unsigned char *key
, unsigned char *blk
, int len
);
523 void des3_encrypt_pubkey(unsigned char *key
, unsigned char *blk
, int len
);
524 void des3_decrypt_pubkey_ossh(unsigned char *key
, unsigned char *iv
,
525 unsigned char *blk
, int len
);
526 void des3_encrypt_pubkey_ossh(unsigned char *key
, unsigned char *iv
,
527 unsigned char *blk
, int len
);
528 void aes256_encrypt_pubkey(unsigned char *key
, unsigned char *blk
,
530 void aes256_decrypt_pubkey(unsigned char *key
, unsigned char *blk
,
533 void des_encrypt_xdmauth(unsigned char *key
, unsigned char *blk
, int len
);
534 void des_decrypt_xdmauth(unsigned char *key
, unsigned char *blk
, int len
);
537 * For progress updates in the key generation utility.
539 #define PROGFN_INITIALISE 1
540 #define PROGFN_LIN_PHASE 2
541 #define PROGFN_EXP_PHASE 3
542 #define PROGFN_PHASE_EXTENT 4
543 #define PROGFN_READY 5
544 #define PROGFN_PROGRESS 6
545 typedef void (*progfn_t
) (void *param
, int action
, int phase
, int progress
);
547 int rsa_generate(struct RSAKey
*key
, int bits
, progfn_t pfn
,
549 int dsa_generate(struct dss_key
*key
, int bits
, progfn_t pfn
,
551 Bignum
primegen(int bits
, int modulus
, int residue
, Bignum factor
,
552 int phase
, progfn_t pfn
, void *pfnparam
);
558 void *zlib_compress_init(void);
559 void zlib_compress_cleanup(void *);
560 void *zlib_decompress_init(void);
561 void zlib_decompress_cleanup(void *);
562 int zlib_compress_block(void *, unsigned char *block
, int len
,
563 unsigned char **outblock
, int *outlen
);
564 int zlib_decompress_block(void *, unsigned char *block
, int len
,
565 unsigned char **outblock
, int *outlen
);
568 * SSH-1 agent messages.
570 #define SSH1_AGENTC_REQUEST_RSA_IDENTITIES 1
571 #define SSH1_AGENT_RSA_IDENTITIES_ANSWER 2
572 #define SSH1_AGENTC_RSA_CHALLENGE 3
573 #define SSH1_AGENT_RSA_RESPONSE 4
574 #define SSH1_AGENTC_ADD_RSA_IDENTITY 7
575 #define SSH1_AGENTC_REMOVE_RSA_IDENTITY 8
576 #define SSH1_AGENTC_REMOVE_ALL_RSA_IDENTITIES 9 /* openssh private? */
579 * Messages common to SSH-1 and OpenSSH's SSH-2.
581 #define SSH_AGENT_FAILURE 5
582 #define SSH_AGENT_SUCCESS 6
585 * OpenSSH's SSH-2 agent messages.
587 #define SSH2_AGENTC_REQUEST_IDENTITIES 11
588 #define SSH2_AGENT_IDENTITIES_ANSWER 12
589 #define SSH2_AGENTC_SIGN_REQUEST 13
590 #define SSH2_AGENT_SIGN_RESPONSE 14
591 #define SSH2_AGENTC_ADD_IDENTITY 17
592 #define SSH2_AGENTC_REMOVE_IDENTITY 18
593 #define SSH2_AGENTC_REMOVE_ALL_IDENTITIES 19
596 * Need this to warn about support for the original SSH-2 keyfile
599 void old_keyfile_warning(void);