9 extern void sshfwd_close(struct ssh_channel
*c
);
10 extern int sshfwd_write(struct ssh_channel
*c
, char *, int);
11 extern void sshfwd_unthrottle(struct ssh_channel
*c
, int bufsize
);
17 #define lenof(x) ( (sizeof((x))) / (sizeof(*(x))))
20 #define SSH_CIPHER_IDEA 1
21 #define SSH_CIPHER_DES 2
22 #define SSH_CIPHER_3DES 3
23 #define SSH_CIPHER_BLOWFISH 6
31 #ifndef BIGNUM_INTERNAL
39 unsigned long exponent
;
40 unsigned char *modulus
;
44 Bignum private_exponent
;
56 int makekey(unsigned char *data
, struct RSAKey
*result
,
57 unsigned char **keystr
, int order
);
58 int makeprivate(unsigned char *data
, struct RSAKey
*result
);
59 void rsaencrypt(unsigned char *data
, int length
, struct RSAKey
*key
);
60 Bignum
rsadecrypt(Bignum input
, struct RSAKey
*key
);
61 void rsasign(unsigned char *data
, int length
, struct RSAKey
*key
);
62 void rsasanitise(struct RSAKey
*key
);
63 int rsastr_len(struct RSAKey
*key
);
64 void rsastr_fmt(char *str
, struct RSAKey
*key
);
65 void rsa_fingerprint(char *str
, int len
, struct RSAKey
*key
);
66 int rsa_verify(struct RSAKey
*key
);
67 unsigned char *rsa_public_blob(struct RSAKey
*key
, int *len
);
68 int rsa_public_blob_len(void *data
);
69 void freersakey(struct RSAKey
*key
);
71 typedef unsigned int word32
;
72 typedef unsigned int uint32
;
74 unsigned long crc32(const void *s
, size_t len
);
75 unsigned long crc32_update(unsigned long crc_input
, const void *s
, size_t len
);
77 /* SSH CRC compensation attack detector */
78 void *crcda_make_context(void);
79 void crcda_free_context(void *handle
);
80 int detect_attack(void *handle
, unsigned char *buf
, uint32 len
,
92 unsigned char block
[64];
98 void MD5Init(struct MD5Context
*context
);
99 void MD5Update(struct MD5Context
*context
, unsigned char const *buf
,
101 void MD5Final(unsigned char digest
[16], struct MD5Context
*context
);
105 unsigned char block
[64];
109 void SHA_Init(SHA_State
* s
);
110 void SHA_Bytes(SHA_State
* s
, void *p
, int len
);
111 void SHA_Final(SHA_State
* s
, unsigned char *output
);
112 void SHA_Simple(void *p
, int len
, unsigned char *output
);
114 void hmac_sha1_simple(void *key
, int keylen
, void *data
, int datalen
,
115 unsigned char *output
);
119 unsigned char block
[128];
123 void SHA512_Init(SHA512_State
* s
);
124 void SHA512_Bytes(SHA512_State
* s
, const void *p
, int len
);
125 void SHA512_Final(SHA512_State
* s
, unsigned char *output
);
126 void SHA512_Simple(const void *p
, int len
, unsigned char *output
);
129 void *(*make_context
)(void);
130 void (*free_context
)(void *);
131 void (*sesskey
) (void *, unsigned char *key
); /* for ssh 1 */
132 void (*encrypt
) (void *, unsigned char *blk
, int len
);
133 void (*decrypt
) (void *, unsigned char *blk
, int len
);
139 void *(*make_context
)(void);
140 void (*free_context
)(void *);
141 void (*setiv
) (void *, unsigned char *key
); /* for ssh 2 */
142 void (*setkey
) (void *, unsigned char *key
);/* for ssh 2 */
143 void (*encrypt
) (void *, unsigned char *blk
, int len
);
144 void (*decrypt
) (void *, unsigned char *blk
, int len
);
151 struct ssh2_ciphers
{
153 const struct ssh2_cipher
*const *list
;
157 void *(*make_context
)(void);
158 void (*free_context
)(void *);
159 void (*setkey
) (void *, unsigned char *key
);
160 void (*generate
) (void *, unsigned char *blk
, int len
, unsigned long seq
);
161 int (*verify
) (void *, unsigned char *blk
, int len
, unsigned long seq
);
168 * Plugging in another KEX algorithm requires structural chaos,
169 * so it's hard to abstract them into nice little structures
170 * like this. Hence, for the moment, this is just a
171 * placeholder. I claim justification in the fact that OpenSSH
178 void *(*newkey
) (char *data
, int len
);
179 void (*freekey
) (void *key
);
180 char *(*fmtkey
) (void *key
);
181 unsigned char *(*public_blob
) (void *key
, int *len
);
182 unsigned char *(*private_blob
) (void *key
, int *len
);
183 void *(*createkey
) (unsigned char *pub_blob
, int pub_len
,
184 unsigned char *priv_blob
, int priv_len
);
185 void *(*openssh_createkey
) (unsigned char **blob
, int *len
);
186 int (*openssh_fmtkey
) (void *key
, unsigned char *blob
, int len
);
187 char *(*fingerprint
) (void *key
);
188 int (*verifysig
) (void *key
, char *sig
, int siglen
,
189 char *data
, int datalen
);
190 unsigned char *(*sign
) (void *key
, char *data
, int datalen
,
193 char *keytype
; /* for host key cache */
196 struct ssh_compress
{
198 void *(*compress_init
) (void);
199 void (*compress_cleanup
) (void *);
200 int (*compress
) (void *, unsigned char *block
, int len
,
201 unsigned char **outblock
, int *outlen
);
202 void *(*decompress_init
) (void);
203 void (*decompress_cleanup
) (void *);
204 int (*decompress
) (void *, unsigned char *block
, int len
,
205 unsigned char **outblock
, int *outlen
);
206 int (*disable_compression
) (void *);
210 struct ssh2_userkey
{
211 const struct ssh_signkey
*alg
; /* the key algorithm */
212 void *data
; /* the key data */
213 char *comment
; /* the key comment */
216 extern const struct ssh_cipher ssh_3des
;
217 extern const struct ssh_cipher ssh_des
;
218 extern const struct ssh_cipher ssh_blowfish_ssh1
;
219 extern const struct ssh2_ciphers ssh2_3des
;
220 extern const struct ssh2_ciphers ssh2_des
;
221 extern const struct ssh2_ciphers ssh2_aes
;
222 extern const struct ssh2_ciphers ssh2_blowfish
;
223 extern const struct ssh_kex ssh_diffiehellman
;
224 extern const struct ssh_kex ssh_diffiehellman_gex
;
225 extern const struct ssh_signkey ssh_dss
;
226 extern const struct ssh_signkey ssh_rsa
;
227 extern const struct ssh_mac ssh_md5
;
228 extern const struct ssh_mac ssh_sha1
;
229 extern const struct ssh_mac ssh_sha1_buggy
;
232 * PuTTY version number formatted as an SSH version string.
234 extern char sshver
[];
237 * Gross hack: pscp will try to start SFTP but fall back to scp1 if
238 * that fails. This variable is the means by which scp.c can reach
239 * into the SSH code and find out which one it got.
241 extern int ssh_fallback_cmd(void *handle
);
244 void SHATransform(word32
* digest
, word32
* data
);
247 int random_byte(void);
248 void random_add_noise(void *noise
, int length
);
249 void random_add_heavynoise(void *noise
, int length
);
251 void logevent(void *, char *);
253 /* Allocate and register a new channel for port forwarding */
254 void *new_sock_channel(void *handle
, Socket s
);
255 void ssh_send_port_open(void *channel
, char *hostname
, int port
, char *org
);
257 /* Exports from portfwd.c */
258 extern char *pfd_newconnect(Socket
* s
, char *hostname
, int port
, void *c
);
259 extern char *pfd_addforward(char *desthost
, int destport
, char *srcaddr
,
260 int port
, void *backhandle
);
261 extern void pfd_close(Socket s
);
262 extern int pfd_send(Socket s
, char *data
, int len
);
263 extern void pfd_confirm(Socket s
);
264 extern void pfd_unthrottle(Socket s
);
265 extern void pfd_override_throttle(Socket s
, int enable
);
267 /* Exports from x11fwd.c */
268 extern char *x11_init(Socket
*, char *, void *, void *);
269 extern void x11_close(Socket
);
270 extern int x11_send(Socket
, char *, int);
271 extern void *x11_invent_auth(char *, int, char *, int);
272 extern void x11_unthrottle(Socket s
);
273 extern void x11_override_throttle(Socket s
, int enable
);
274 extern int x11_get_screen_number(char *display
);
276 Bignum
copybn(Bignum b
);
277 Bignum
bn_power_2(int n
);
278 void bn_restore_invariant(Bignum b
);
279 Bignum
bignum_from_long(unsigned long n
);
280 void freebn(Bignum b
);
281 Bignum
modpow(Bignum base
, Bignum exp
, Bignum mod
);
282 Bignum
modmul(Bignum a
, Bignum b
, Bignum mod
);
283 void decbn(Bignum n
);
284 extern Bignum Zero
, One
;
285 Bignum
bignum_from_bytes(const unsigned char *data
, int nbytes
);
286 int ssh1_read_bignum(const unsigned char *data
, Bignum
* result
);
287 int bignum_bitcount(Bignum bn
);
288 int ssh1_bignum_length(Bignum bn
);
289 int ssh2_bignum_length(Bignum bn
);
290 int bignum_byte(Bignum bn
, int i
);
291 int bignum_bit(Bignum bn
, int i
);
292 void bignum_set_bit(Bignum bn
, int i
, int value
);
293 int ssh1_write_bignum(void *data
, Bignum bn
);
294 Bignum
biggcd(Bignum a
, Bignum b
);
295 unsigned short bignum_mod_short(Bignum number
, unsigned short modulus
);
296 Bignum
bignum_add_long(Bignum number
, unsigned long addend
);
297 Bignum
bigmul(Bignum a
, Bignum b
);
298 Bignum
bigmuladd(Bignum a
, Bignum b
, Bignum addend
);
299 Bignum
bigdiv(Bignum a
, Bignum b
);
300 Bignum
bigmod(Bignum a
, Bignum b
);
301 Bignum
modinv(Bignum number
, Bignum modulus
);
302 Bignum
bignum_bitmask(Bignum number
);
303 Bignum
bignum_rshift(Bignum number
, int shift
);
304 int bignum_cmp(Bignum a
, Bignum b
);
305 char *bignum_decimal(Bignum x
);
307 void *dh_setup_group1(void);
308 void *dh_setup_group(Bignum pval
, Bignum gval
);
309 void dh_cleanup(void *);
310 Bignum
dh_create_e(void *, int nbits
);
311 Bignum
dh_find_K(void *, Bignum f
);
313 int loadrsakey(char *filename
, struct RSAKey
*key
, char *passphrase
);
314 int rsakey_encrypted(char *filename
, char **comment
);
315 int rsakey_pubblob(char *filename
, void **blob
, int *bloblen
);
317 int saversakey(char *filename
, struct RSAKey
*key
, char *passphrase
);
319 void base64_encode_atom(unsigned char *data
, int n
, char *out
);
321 /* ssh2_load_userkey can return this as an error */
322 extern struct ssh2_userkey ssh2_wrong_passphrase
;
323 #define SSH2_WRONG_PASSPHRASE (&ssh2_wrong_passphrase)
325 int ssh2_userkey_encrypted(char *filename
, char **comment
);
326 struct ssh2_userkey
*ssh2_load_userkey(char *filename
, char *passphrase
);
327 char *ssh2_userkey_loadpub(char *filename
, char **algorithm
,
329 int ssh2_save_userkey(char *filename
, struct ssh2_userkey
*key
,
333 SSH_KEYTYPE_UNOPENABLE
,
335 SSH_KEYTYPE_SSH1
, SSH_KEYTYPE_SSH2
,
336 SSH_KEYTYPE_OPENSSH
, SSH_KEYTYPE_SSHCOM
338 int key_type(char *filename
);
339 char *key_type_to_str(int type
);
341 int import_possible(int type
);
342 int import_target_type(int type
);
343 int import_encrypted(char *filename
, int type
, char **comment
);
344 int import_ssh1(char *filename
, int type
, struct RSAKey
*key
,char *passphrase
);
345 struct ssh2_userkey
*import_ssh2(char *filename
, int type
, char *passphrase
);
346 int export_ssh1(char *filename
, int type
, struct RSAKey
*key
,char *passphrase
);
347 int export_ssh2(char *filename
, int type
,
348 struct ssh2_userkey
*key
, char *passphrase
);
350 void des3_decrypt_pubkey(unsigned char *key
, unsigned char *blk
, int len
);
351 void des3_encrypt_pubkey(unsigned char *key
, unsigned char *blk
, int len
);
352 void des3_decrypt_pubkey_ossh(unsigned char *key
, unsigned char *iv
,
353 unsigned char *blk
, int len
);
354 void des3_encrypt_pubkey_ossh(unsigned char *key
, unsigned char *iv
,
355 unsigned char *blk
, int len
);
356 void aes256_encrypt_pubkey(unsigned char *key
, unsigned char *blk
,
358 void aes256_decrypt_pubkey(unsigned char *key
, unsigned char *blk
,
362 * For progress updates in the key generation utility.
364 #define PROGFN_INITIALISE 1
365 #define PROGFN_LIN_PHASE 2
366 #define PROGFN_EXP_PHASE 3
367 #define PROGFN_PHASE_EXTENT 4
368 #define PROGFN_READY 5
369 #define PROGFN_PROGRESS 6
370 typedef void (*progfn_t
) (void *param
, int action
, int phase
, int progress
);
372 int rsa_generate(struct RSAKey
*key
, int bits
, progfn_t pfn
,
374 int dsa_generate(struct dss_key
*key
, int bits
, progfn_t pfn
,
376 Bignum
primegen(int bits
, int modulus
, int residue
, Bignum factor
,
377 int phase
, progfn_t pfn
, void *pfnparam
);
383 void *zlib_compress_init(void);
384 void zlib_compress_cleanup(void *);
385 void *zlib_decompress_init(void);
386 void zlib_decompress_cleanup(void *);
387 int zlib_compress_block(void *, unsigned char *block
, int len
,
388 unsigned char **outblock
, int *outlen
);
389 int zlib_decompress_block(void *, unsigned char *block
, int len
,
390 unsigned char **outblock
, int *outlen
);
393 * SSH1 agent messages.
395 #define SSH1_AGENTC_REQUEST_RSA_IDENTITIES 1
396 #define SSH1_AGENT_RSA_IDENTITIES_ANSWER 2
397 #define SSH1_AGENTC_RSA_CHALLENGE 3
398 #define SSH1_AGENT_RSA_RESPONSE 4
399 #define SSH1_AGENTC_ADD_RSA_IDENTITY 7
400 #define SSH1_AGENTC_REMOVE_RSA_IDENTITY 8
401 #define SSH1_AGENTC_REMOVE_ALL_RSA_IDENTITIES 9 /* openssh private? */
404 * Messages common to SSH1 and OpenSSH's SSH2.
406 #define SSH_AGENT_FAILURE 5
407 #define SSH_AGENT_SUCCESS 6
410 * OpenSSH's SSH2 agent messages.
412 #define SSH2_AGENTC_REQUEST_IDENTITIES 11
413 #define SSH2_AGENT_IDENTITIES_ANSWER 12
414 #define SSH2_AGENTC_SIGN_REQUEST 13
415 #define SSH2_AGENT_SIGN_RESPONSE 14
416 #define SSH2_AGENTC_ADD_IDENTITY 17
417 #define SSH2_AGENTC_REMOVE_IDENTITY 18
418 #define SSH2_AGENTC_REMOVE_ALL_IDENTITIES 19
421 * Need this to warn about support for the original SSH2 keyfile
424 void old_keyfile_warning(void);