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
);
177 * Plugging in another KEX algorithm requires structural chaos,
178 * so it's hard to abstract them into nice little structures
179 * like this. Hence, for the moment, this is just a
180 * placeholder. I claim justification in the fact that OpenSSH
187 void *(*newkey
) (char *data
, int len
);
188 void (*freekey
) (void *key
);
189 char *(*fmtkey
) (void *key
);
190 unsigned char *(*public_blob
) (void *key
, int *len
);
191 unsigned char *(*private_blob
) (void *key
, int *len
);
192 void *(*createkey
) (unsigned char *pub_blob
, int pub_len
,
193 unsigned char *priv_blob
, int priv_len
);
194 void *(*openssh_createkey
) (unsigned char **blob
, int *len
);
195 int (*openssh_fmtkey
) (void *key
, unsigned char *blob
, int len
);
196 int (*pubkey_bits
) (void *blob
, int len
);
197 char *(*fingerprint
) (void *key
);
198 int (*verifysig
) (void *key
, char *sig
, int siglen
,
199 char *data
, int datalen
);
200 unsigned char *(*sign
) (void *key
, char *data
, int datalen
,
203 char *keytype
; /* for host key cache */
206 struct ssh_compress
{
208 void *(*compress_init
) (void);
209 void (*compress_cleanup
) (void *);
210 int (*compress
) (void *, unsigned char *block
, int len
,
211 unsigned char **outblock
, int *outlen
);
212 void *(*decompress_init
) (void);
213 void (*decompress_cleanup
) (void *);
214 int (*decompress
) (void *, unsigned char *block
, int len
,
215 unsigned char **outblock
, int *outlen
);
216 int (*disable_compression
) (void *);
220 struct ssh2_userkey
{
221 const struct ssh_signkey
*alg
; /* the key algorithm */
222 void *data
; /* the key data */
223 char *comment
; /* the key comment */
226 extern const struct ssh_cipher ssh_3des
;
227 extern const struct ssh_cipher ssh_des
;
228 extern const struct ssh_cipher ssh_blowfish_ssh1
;
229 extern const struct ssh2_ciphers ssh2_3des
;
230 extern const struct ssh2_ciphers ssh2_des
;
231 extern const struct ssh2_ciphers ssh2_aes
;
232 extern const struct ssh2_ciphers ssh2_blowfish
;
233 extern const struct ssh_kex ssh_diffiehellman
;
234 extern const struct ssh_kex ssh_diffiehellman_gex
;
235 extern const struct ssh_signkey ssh_dss
;
236 extern const struct ssh_signkey ssh_rsa
;
237 extern const struct ssh_mac ssh_md5
;
238 extern const struct ssh_mac ssh_sha1
;
239 extern const struct ssh_mac ssh_sha1_buggy
;
242 * PuTTY version number formatted as an SSH version string.
244 extern char sshver
[];
247 * Gross hack: pscp will try to start SFTP but fall back to scp1 if
248 * that fails. This variable is the means by which scp.c can reach
249 * into the SSH code and find out which one it got.
251 extern int ssh_fallback_cmd(void *handle
);
254 void SHATransform(word32
* digest
, word32
* data
);
257 int random_byte(void);
258 void random_add_noise(void *noise
, int length
);
259 void random_add_heavynoise(void *noise
, int length
);
261 void logevent(void *, const char *);
263 /* Allocate and register a new channel for port forwarding */
264 void *new_sock_channel(void *handle
, Socket s
);
265 void ssh_send_port_open(void *channel
, char *hostname
, int port
, char *org
);
267 /* Exports from portfwd.c */
268 extern const char *pfd_newconnect(Socket
* s
, char *hostname
, int port
,
269 void *c
, const Config
*cfg
);
270 /* desthost == NULL indicates dynamic (SOCKS) port forwarding */
271 extern const char *pfd_addforward(char *desthost
, int destport
, char *srcaddr
,
272 int port
, void *backhandle
,
274 extern void pfd_close(Socket s
);
275 extern int pfd_send(Socket s
, char *data
, int len
);
276 extern void pfd_confirm(Socket s
);
277 extern void pfd_unthrottle(Socket s
);
278 extern void pfd_override_throttle(Socket s
, int enable
);
280 /* Exports from x11fwd.c */
281 extern const char *x11_init(Socket
*, char *, void *, void *, const char *,
282 int, const Config
*);
283 extern void x11_close(Socket
);
284 extern int x11_send(Socket
, char *, int);
285 extern void *x11_invent_auth(char *, int, char *, int, int);
286 extern void x11_free_auth(void *);
287 extern void x11_unthrottle(Socket s
);
288 extern void x11_override_throttle(Socket s
, int enable
);
289 extern int x11_get_screen_number(char *display
);
290 void x11_get_real_auth(void *authv
, char *display
);
291 char *x11_display(const char *display
);
293 /* Platform-dependent X11 functions */
294 extern void platform_get_x11_auth(char *display
, int *proto
,
295 unsigned char *data
, int *datalen
);
296 extern const char platform_x11_best_transport
[];
297 /* best X11 hostname for this platform if none specified */
298 SockAddr
platform_get_x11_unix_address(int displaynum
, char **canonicalname
);
299 /* make up a SockAddr naming the address for displaynum */
301 Bignum
copybn(Bignum b
);
302 Bignum
bn_power_2(int n
);
303 void bn_restore_invariant(Bignum b
);
304 Bignum
bignum_from_long(unsigned long n
);
305 void freebn(Bignum b
);
306 Bignum
modpow(Bignum base
, Bignum exp
, Bignum mod
);
307 Bignum
modmul(Bignum a
, Bignum b
, Bignum mod
);
308 void decbn(Bignum n
);
309 extern Bignum Zero
, One
;
310 Bignum
bignum_from_bytes(const unsigned char *data
, int nbytes
);
311 int ssh1_read_bignum(const unsigned char *data
, int len
, Bignum
* result
);
312 int bignum_bitcount(Bignum bn
);
313 int ssh1_bignum_length(Bignum bn
);
314 int ssh2_bignum_length(Bignum bn
);
315 int bignum_byte(Bignum bn
, int i
);
316 int bignum_bit(Bignum bn
, int i
);
317 void bignum_set_bit(Bignum bn
, int i
, int value
);
318 int ssh1_write_bignum(void *data
, Bignum bn
);
319 Bignum
biggcd(Bignum a
, Bignum b
);
320 unsigned short bignum_mod_short(Bignum number
, unsigned short modulus
);
321 Bignum
bignum_add_long(Bignum number
, unsigned long addend
);
322 Bignum
bigmul(Bignum a
, Bignum b
);
323 Bignum
bigmuladd(Bignum a
, Bignum b
, Bignum addend
);
324 Bignum
bigdiv(Bignum a
, Bignum b
);
325 Bignum
bigmod(Bignum a
, Bignum b
);
326 Bignum
modinv(Bignum number
, Bignum modulus
);
327 Bignum
bignum_bitmask(Bignum number
);
328 Bignum
bignum_rshift(Bignum number
, int shift
);
329 int bignum_cmp(Bignum a
, Bignum b
);
330 char *bignum_decimal(Bignum x
);
333 void diagbn(char *prefix
, Bignum md
);
336 void *dh_setup_group1(void);
337 void *dh_setup_group(Bignum pval
, Bignum gval
);
338 void dh_cleanup(void *);
339 Bignum
dh_create_e(void *, int nbits
);
340 Bignum
dh_find_K(void *, Bignum f
);
342 int loadrsakey(const Filename
*filename
, struct RSAKey
*key
,
343 char *passphrase
, const char **errorstr
);
344 int rsakey_encrypted(const Filename
*filename
, char **comment
);
345 int rsakey_pubblob(const Filename
*filename
, void **blob
, int *bloblen
,
346 const char **errorstr
);
348 int saversakey(const Filename
*filename
, struct RSAKey
*key
, char *passphrase
);
350 extern int base64_decode_atom(char *atom
, unsigned char *out
);
351 extern int base64_lines(int datalen
);
352 extern void base64_encode_atom(unsigned char *data
, int n
, char *out
);
353 extern void base64_encode(FILE *fp
, unsigned char *data
, int datalen
, int cpl
);
355 /* ssh2_load_userkey can return this as an error */
356 extern struct ssh2_userkey ssh2_wrong_passphrase
;
357 #define SSH2_WRONG_PASSPHRASE (&ssh2_wrong_passphrase)
359 int ssh2_userkey_encrypted(const Filename
*filename
, char **comment
);
360 struct ssh2_userkey
*ssh2_load_userkey(const Filename
*filename
,
361 char *passphrase
, const char **errorstr
);
362 char *ssh2_userkey_loadpub(const Filename
*filename
, char **algorithm
,
363 int *pub_blob_len
, const char **errorstr
);
364 int ssh2_save_userkey(const Filename
*filename
, struct ssh2_userkey
*key
,
366 const struct ssh_signkey
*find_pubkey_alg(const char *name
);
369 SSH_KEYTYPE_UNOPENABLE
,
371 SSH_KEYTYPE_SSH1
, SSH_KEYTYPE_SSH2
,
372 SSH_KEYTYPE_OPENSSH
, SSH_KEYTYPE_SSHCOM
374 int key_type(const Filename
*filename
);
375 char *key_type_to_str(int type
);
377 int import_possible(int type
);
378 int import_target_type(int type
);
379 int import_encrypted(const Filename
*filename
, int type
, char **comment
);
380 int import_ssh1(const Filename
*filename
, int type
,
381 struct RSAKey
*key
, char *passphrase
);
382 struct ssh2_userkey
*import_ssh2(const Filename
*filename
, int type
,
384 int export_ssh1(const Filename
*filename
, int type
,
385 struct RSAKey
*key
, char *passphrase
);
386 int export_ssh2(const Filename
*filename
, int type
,
387 struct ssh2_userkey
*key
, char *passphrase
);
389 void des3_decrypt_pubkey(unsigned char *key
, unsigned char *blk
, int len
);
390 void des3_encrypt_pubkey(unsigned char *key
, unsigned char *blk
, int len
);
391 void des3_decrypt_pubkey_ossh(unsigned char *key
, unsigned char *iv
,
392 unsigned char *blk
, int len
);
393 void des3_encrypt_pubkey_ossh(unsigned char *key
, unsigned char *iv
,
394 unsigned char *blk
, int len
);
395 void aes256_encrypt_pubkey(unsigned char *key
, unsigned char *blk
,
397 void aes256_decrypt_pubkey(unsigned char *key
, unsigned char *blk
,
400 void des_encrypt_xdmauth(unsigned char *key
, unsigned char *blk
, int len
);
401 void des_decrypt_xdmauth(unsigned char *key
, unsigned char *blk
, int len
);
404 * For progress updates in the key generation utility.
406 #define PROGFN_INITIALISE 1
407 #define PROGFN_LIN_PHASE 2
408 #define PROGFN_EXP_PHASE 3
409 #define PROGFN_PHASE_EXTENT 4
410 #define PROGFN_READY 5
411 #define PROGFN_PROGRESS 6
412 typedef void (*progfn_t
) (void *param
, int action
, int phase
, int progress
);
414 int rsa_generate(struct RSAKey
*key
, int bits
, progfn_t pfn
,
416 int dsa_generate(struct dss_key
*key
, int bits
, progfn_t pfn
,
418 Bignum
primegen(int bits
, int modulus
, int residue
, Bignum factor
,
419 int phase
, progfn_t pfn
, void *pfnparam
);
425 void *zlib_compress_init(void);
426 void zlib_compress_cleanup(void *);
427 void *zlib_decompress_init(void);
428 void zlib_decompress_cleanup(void *);
429 int zlib_compress_block(void *, unsigned char *block
, int len
,
430 unsigned char **outblock
, int *outlen
);
431 int zlib_decompress_block(void *, unsigned char *block
, int len
,
432 unsigned char **outblock
, int *outlen
);
435 * SSH1 agent messages.
437 #define SSH1_AGENTC_REQUEST_RSA_IDENTITIES 1
438 #define SSH1_AGENT_RSA_IDENTITIES_ANSWER 2
439 #define SSH1_AGENTC_RSA_CHALLENGE 3
440 #define SSH1_AGENT_RSA_RESPONSE 4
441 #define SSH1_AGENTC_ADD_RSA_IDENTITY 7
442 #define SSH1_AGENTC_REMOVE_RSA_IDENTITY 8
443 #define SSH1_AGENTC_REMOVE_ALL_RSA_IDENTITIES 9 /* openssh private? */
446 * Messages common to SSH1 and OpenSSH's SSH2.
448 #define SSH_AGENT_FAILURE 5
449 #define SSH_AGENT_SUCCESS 6
452 * OpenSSH's SSH2 agent messages.
454 #define SSH2_AGENTC_REQUEST_IDENTITIES 11
455 #define SSH2_AGENT_IDENTITIES_ANSWER 12
456 #define SSH2_AGENTC_SIGN_REQUEST 13
457 #define SSH2_AGENT_SIGN_RESPONSE 14
458 #define SSH2_AGENTC_ADD_IDENTITY 17
459 #define SSH2_AGENTC_REMOVE_IDENTITY 18
460 #define SSH2_AGENTC_REMOVE_ALL_IDENTITIES 19
463 * Need this to warn about support for the original SSH2 keyfile
466 void old_keyfile_warning(void);