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
);
127 unsigned char block
[64];
131 void SHA256_Init(SHA256_State
* s
);
132 void SHA256_Bytes(SHA256_State
* s
, const void *p
, int len
);
133 void SHA256_Final(SHA256_State
* s
, unsigned char *output
);
134 void SHA256_Simple(const void *p
, int len
, unsigned char *output
);
138 unsigned char block
[128];
142 void SHA512_Init(SHA512_State
* s
);
143 void SHA512_Bytes(SHA512_State
* s
, const void *p
, int len
);
144 void SHA512_Final(SHA512_State
* s
, unsigned char *output
);
145 void SHA512_Simple(const void *p
, int len
, unsigned char *output
);
148 void *(*make_context
)(void);
149 void (*free_context
)(void *);
150 void (*sesskey
) (void *, unsigned char *key
); /* for SSH-1 */
151 void (*encrypt
) (void *, unsigned char *blk
, int len
);
152 void (*decrypt
) (void *, unsigned char *blk
, int len
);
158 void *(*make_context
)(void);
159 void (*free_context
)(void *);
160 void (*setiv
) (void *, unsigned char *key
); /* for SSH-2 */
161 void (*setkey
) (void *, unsigned char *key
);/* for SSH-2 */
162 void (*encrypt
) (void *, unsigned char *blk
, int len
);
163 void (*decrypt
) (void *, unsigned char *blk
, int len
);
168 #define SSH_CIPHER_IS_CBC 1
172 struct ssh2_ciphers
{
174 const struct ssh2_cipher
*const *list
;
178 void *(*make_context
)(void);
179 void (*free_context
)(void *);
180 void (*setkey
) (void *, unsigned char *key
);
181 void (*generate
) (void *, unsigned char *blk
, int len
, unsigned long seq
);
182 int (*verify
) (void *, unsigned char *blk
, int len
, unsigned long seq
);
189 void *(*init
)(void); /* also allocates context */
190 void (*bytes
)(void *, void *, int);
191 void (*final
)(void *, unsigned char *); /* also frees context */
192 int hlen
; /* output length in bytes */
198 * Plugging in another KEX algorithm requires structural chaos,
199 * so it's hard to abstract them into nice little structures
200 * like this. Fortunately, all our KEXes are basically
201 * Diffie-Hellman at the moment, so in this structure I simply
202 * parametrise the DH exchange a bit.
204 char *name
, *groupname
;
205 const unsigned char *pdata
, *gdata
;/* NULL means use group exchange */
207 const struct ssh_hash
*hash
;
212 const struct ssh_kex
*const *list
;
216 void *(*newkey
) (char *data
, int len
);
217 void (*freekey
) (void *key
);
218 char *(*fmtkey
) (void *key
);
219 unsigned char *(*public_blob
) (void *key
, int *len
);
220 unsigned char *(*private_blob
) (void *key
, int *len
);
221 void *(*createkey
) (unsigned char *pub_blob
, int pub_len
,
222 unsigned char *priv_blob
, int priv_len
);
223 void *(*openssh_createkey
) (unsigned char **blob
, int *len
);
224 int (*openssh_fmtkey
) (void *key
, unsigned char *blob
, int len
);
225 int (*pubkey_bits
) (void *blob
, int len
);
226 char *(*fingerprint
) (void *key
);
227 int (*verifysig
) (void *key
, char *sig
, int siglen
,
228 char *data
, int datalen
);
229 unsigned char *(*sign
) (void *key
, char *data
, int datalen
,
232 char *keytype
; /* for host key cache */
235 struct ssh_compress
{
237 void *(*compress_init
) (void);
238 void (*compress_cleanup
) (void *);
239 int (*compress
) (void *, unsigned char *block
, int len
,
240 unsigned char **outblock
, int *outlen
);
241 void *(*decompress_init
) (void);
242 void (*decompress_cleanup
) (void *);
243 int (*decompress
) (void *, unsigned char *block
, int len
,
244 unsigned char **outblock
, int *outlen
);
245 int (*disable_compression
) (void *);
249 struct ssh2_userkey
{
250 const struct ssh_signkey
*alg
; /* the key algorithm */
251 void *data
; /* the key data */
252 char *comment
; /* the key comment */
255 /* The maximum length of any hash algorithm used in kex. (bytes) */
256 #define SSH2_KEX_MAX_HASH_LEN (32) /* SHA-256 */
258 extern const struct ssh_cipher ssh_3des
;
259 extern const struct ssh_cipher ssh_des
;
260 extern const struct ssh_cipher ssh_blowfish_ssh1
;
261 extern const struct ssh2_ciphers ssh2_3des
;
262 extern const struct ssh2_ciphers ssh2_des
;
263 extern const struct ssh2_ciphers ssh2_aes
;
264 extern const struct ssh2_ciphers ssh2_blowfish
;
265 extern const struct ssh2_ciphers ssh2_arcfour
;
266 extern const struct ssh_hash ssh_sha1
;
267 extern const struct ssh_hash ssh_sha256
;
268 extern const struct ssh_kexes ssh_diffiehellman_group1
;
269 extern const struct ssh_kexes ssh_diffiehellman_group14
;
270 extern const struct ssh_kexes ssh_diffiehellman_gex
;
271 extern const struct ssh_signkey ssh_dss
;
272 extern const struct ssh_signkey ssh_rsa
;
273 extern const struct ssh_mac ssh_hmac_md5
;
274 extern const struct ssh_mac ssh_hmac_sha1
;
275 extern const struct ssh_mac ssh_hmac_sha1_buggy
;
276 extern const struct ssh_mac ssh_hmac_sha1_96
;
277 extern const struct ssh_mac ssh_hmac_sha1_96_buggy
;
281 * PuTTY version number formatted as an SSH version string.
283 extern char sshver
[];
286 * Gross hack: pscp will try to start SFTP but fall back to scp1 if
287 * that fails. This variable is the means by which scp.c can reach
288 * into the SSH code and find out which one it got.
290 extern int ssh_fallback_cmd(void *handle
);
293 void SHATransform(word32
* digest
, word32
* data
);
296 int random_byte(void);
297 void random_add_noise(void *noise
, int length
);
298 void random_add_heavynoise(void *noise
, int length
);
300 void logevent(void *, const char *);
302 /* Allocate and register a new channel for port forwarding */
303 void *new_sock_channel(void *handle
, Socket s
);
304 void ssh_send_port_open(void *channel
, char *hostname
, int port
, char *org
);
306 /* Exports from portfwd.c */
307 extern const char *pfd_newconnect(Socket
* s
, char *hostname
, int port
,
308 void *c
, const Config
*cfg
,
310 /* desthost == NULL indicates dynamic (SOCKS) port forwarding */
311 extern const char *pfd_addforward(char *desthost
, int destport
, char *srcaddr
,
312 int port
, void *backhandle
,
313 const Config
*cfg
, void **sockdata
,
315 extern void pfd_close(Socket s
);
316 extern void pfd_terminate(void *sockdata
);
317 extern int pfd_send(Socket s
, char *data
, int len
);
318 extern void pfd_confirm(Socket s
);
319 extern void pfd_unthrottle(Socket s
);
320 extern void pfd_override_throttle(Socket s
, int enable
);
322 /* Exports from x11fwd.c */
323 extern const char *x11_init(Socket
*, char *, void *, void *, const char *,
324 int, const Config
*);
325 extern void x11_close(Socket
);
326 extern int x11_send(Socket
, char *, int);
327 extern void *x11_invent_auth(char *, int, char *, int, int);
328 extern void x11_free_auth(void *);
329 extern void x11_unthrottle(Socket s
);
330 extern void x11_override_throttle(Socket s
, int enable
);
331 extern int x11_get_screen_number(char *display
);
332 void x11_get_real_auth(void *authv
, char *display
);
333 char *x11_display(const char *display
);
335 /* Platform-dependent X11 functions */
336 extern void platform_get_x11_auth(char *display
, int *proto
,
337 unsigned char *data
, int *datalen
);
338 extern const char platform_x11_best_transport
[];
339 /* best X11 hostname for this platform if none specified */
340 SockAddr
platform_get_x11_unix_address(int displaynum
, char **canonicalname
);
341 /* make up a SockAddr naming the address for displaynum */
342 char *platform_get_x_display(void);
343 /* allocated local X display string, if any */
345 Bignum
copybn(Bignum b
);
346 Bignum
bn_power_2(int n
);
347 void bn_restore_invariant(Bignum b
);
348 Bignum
bignum_from_long(unsigned long n
);
349 void freebn(Bignum b
);
350 Bignum
modpow(Bignum base
, Bignum exp
, Bignum mod
);
351 Bignum
modmul(Bignum a
, Bignum b
, Bignum mod
);
352 void decbn(Bignum n
);
353 extern Bignum Zero
, One
;
354 Bignum
bignum_from_bytes(const unsigned char *data
, int nbytes
);
355 int ssh1_read_bignum(const unsigned char *data
, int len
, Bignum
* result
);
356 int bignum_bitcount(Bignum bn
);
357 int ssh1_bignum_length(Bignum bn
);
358 int ssh2_bignum_length(Bignum bn
);
359 int bignum_byte(Bignum bn
, int i
);
360 int bignum_bit(Bignum bn
, int i
);
361 void bignum_set_bit(Bignum bn
, int i
, int value
);
362 int ssh1_write_bignum(void *data
, Bignum bn
);
363 Bignum
biggcd(Bignum a
, Bignum b
);
364 unsigned short bignum_mod_short(Bignum number
, unsigned short modulus
);
365 Bignum
bignum_add_long(Bignum number
, unsigned long addend
);
366 Bignum
bigmul(Bignum a
, Bignum b
);
367 Bignum
bigmuladd(Bignum a
, Bignum b
, Bignum addend
);
368 Bignum
bigdiv(Bignum a
, Bignum b
);
369 Bignum
bigmod(Bignum a
, Bignum b
);
370 Bignum
modinv(Bignum number
, Bignum modulus
);
371 Bignum
bignum_bitmask(Bignum number
);
372 Bignum
bignum_rshift(Bignum number
, int shift
);
373 int bignum_cmp(Bignum a
, Bignum b
);
374 char *bignum_decimal(Bignum x
);
377 void diagbn(char *prefix
, Bignum md
);
380 void *dh_setup_group(const struct ssh_kex
*kex
);
381 void *dh_setup_gex(Bignum pval
, Bignum gval
);
382 void dh_cleanup(void *);
383 Bignum
dh_create_e(void *, int nbits
);
384 Bignum
dh_find_K(void *, Bignum f
);
386 int loadrsakey(const Filename
*filename
, struct RSAKey
*key
,
387 char *passphrase
, const char **errorstr
);
388 int rsakey_encrypted(const Filename
*filename
, char **comment
);
389 int rsakey_pubblob(const Filename
*filename
, void **blob
, int *bloblen
,
390 char **commentptr
, const char **errorstr
);
392 int saversakey(const Filename
*filename
, struct RSAKey
*key
, char *passphrase
);
394 extern int base64_decode_atom(char *atom
, unsigned char *out
);
395 extern int base64_lines(int datalen
);
396 extern void base64_encode_atom(unsigned char *data
, int n
, char *out
);
397 extern void base64_encode(FILE *fp
, unsigned char *data
, int datalen
, int cpl
);
399 /* ssh2_load_userkey can return this as an error */
400 extern struct ssh2_userkey ssh2_wrong_passphrase
;
401 #define SSH2_WRONG_PASSPHRASE (&ssh2_wrong_passphrase)
403 int ssh2_userkey_encrypted(const Filename
*filename
, char **comment
);
404 struct ssh2_userkey
*ssh2_load_userkey(const Filename
*filename
,
405 char *passphrase
, const char **errorstr
);
406 char *ssh2_userkey_loadpub(const Filename
*filename
, char **algorithm
,
407 int *pub_blob_len
, char **commentptr
,
408 const char **errorstr
);
409 int ssh2_save_userkey(const Filename
*filename
, struct ssh2_userkey
*key
,
411 const struct ssh_signkey
*find_pubkey_alg(const char *name
);
414 SSH_KEYTYPE_UNOPENABLE
,
416 SSH_KEYTYPE_SSH1
, SSH_KEYTYPE_SSH2
,
417 SSH_KEYTYPE_OPENSSH
, SSH_KEYTYPE_SSHCOM
419 int key_type(const Filename
*filename
);
420 char *key_type_to_str(int type
);
422 int import_possible(int type
);
423 int import_target_type(int type
);
424 int import_encrypted(const Filename
*filename
, int type
, char **comment
);
425 int import_ssh1(const Filename
*filename
, int type
,
426 struct RSAKey
*key
, char *passphrase
, const char **errmsg_p
);
427 struct ssh2_userkey
*import_ssh2(const Filename
*filename
, int type
,
428 char *passphrase
, const char **errmsg_p
);
429 int export_ssh1(const Filename
*filename
, int type
,
430 struct RSAKey
*key
, char *passphrase
);
431 int export_ssh2(const Filename
*filename
, int type
,
432 struct ssh2_userkey
*key
, char *passphrase
);
434 void des3_decrypt_pubkey(unsigned char *key
, unsigned char *blk
, int len
);
435 void des3_encrypt_pubkey(unsigned char *key
, unsigned char *blk
, int len
);
436 void des3_decrypt_pubkey_ossh(unsigned char *key
, unsigned char *iv
,
437 unsigned char *blk
, int len
);
438 void des3_encrypt_pubkey_ossh(unsigned char *key
, unsigned char *iv
,
439 unsigned char *blk
, int len
);
440 void aes256_encrypt_pubkey(unsigned char *key
, unsigned char *blk
,
442 void aes256_decrypt_pubkey(unsigned char *key
, unsigned char *blk
,
445 void des_encrypt_xdmauth(unsigned char *key
, unsigned char *blk
, int len
);
446 void des_decrypt_xdmauth(unsigned char *key
, unsigned char *blk
, int len
);
449 * For progress updates in the key generation utility.
451 #define PROGFN_INITIALISE 1
452 #define PROGFN_LIN_PHASE 2
453 #define PROGFN_EXP_PHASE 3
454 #define PROGFN_PHASE_EXTENT 4
455 #define PROGFN_READY 5
456 #define PROGFN_PROGRESS 6
457 typedef void (*progfn_t
) (void *param
, int action
, int phase
, int progress
);
459 int rsa_generate(struct RSAKey
*key
, int bits
, progfn_t pfn
,
461 int dsa_generate(struct dss_key
*key
, int bits
, progfn_t pfn
,
463 Bignum
primegen(int bits
, int modulus
, int residue
, Bignum factor
,
464 int phase
, progfn_t pfn
, void *pfnparam
);
470 void *zlib_compress_init(void);
471 void zlib_compress_cleanup(void *);
472 void *zlib_decompress_init(void);
473 void zlib_decompress_cleanup(void *);
474 int zlib_compress_block(void *, unsigned char *block
, int len
,
475 unsigned char **outblock
, int *outlen
);
476 int zlib_decompress_block(void *, unsigned char *block
, int len
,
477 unsigned char **outblock
, int *outlen
);
480 * SSH-1 agent messages.
482 #define SSH1_AGENTC_REQUEST_RSA_IDENTITIES 1
483 #define SSH1_AGENT_RSA_IDENTITIES_ANSWER 2
484 #define SSH1_AGENTC_RSA_CHALLENGE 3
485 #define SSH1_AGENT_RSA_RESPONSE 4
486 #define SSH1_AGENTC_ADD_RSA_IDENTITY 7
487 #define SSH1_AGENTC_REMOVE_RSA_IDENTITY 8
488 #define SSH1_AGENTC_REMOVE_ALL_RSA_IDENTITIES 9 /* openssh private? */
491 * Messages common to SSH-1 and OpenSSH's SSH-2.
493 #define SSH_AGENT_FAILURE 5
494 #define SSH_AGENT_SUCCESS 6
497 * OpenSSH's SSH-2 agent messages.
499 #define SSH2_AGENTC_REQUEST_IDENTITIES 11
500 #define SSH2_AGENT_IDENTITIES_ANSWER 12
501 #define SSH2_AGENTC_SIGN_REQUEST 13
502 #define SSH2_AGENT_SIGN_RESPONSE 14
503 #define SSH2_AGENTC_ADD_IDENTITY 17
504 #define SSH2_AGENTC_REMOVE_IDENTITY 18
505 #define SSH2_AGENTC_REMOVE_ALL_IDENTITIES 19
508 * Need this to warn about support for the original SSH-2 keyfile
511 void old_keyfile_warning(void);