10 extern void sshfwd_close(struct ssh_channel
*c
);
11 extern int sshfwd_write(struct ssh_channel
*c
, char *, int);
12 extern void sshfwd_unthrottle(struct ssh_channel
*c
, int bufsize
);
18 #define lenof(x) ( (sizeof((x))) / (sizeof(*(x))))
21 #define SSH_CIPHER_IDEA 1
22 #define SSH_CIPHER_DES 2
23 #define SSH_CIPHER_3DES 3
24 #define SSH_CIPHER_BLOWFISH 6
32 #ifndef BIGNUM_INTERNAL
40 unsigned long exponent
;
41 unsigned char *modulus
;
45 Bignum private_exponent
;
57 int makekey(unsigned char *data
, struct RSAKey
*result
,
58 unsigned char **keystr
, int order
);
59 int makeprivate(unsigned char *data
, struct RSAKey
*result
);
60 void rsaencrypt(unsigned char *data
, int length
, struct RSAKey
*key
);
61 Bignum
rsadecrypt(Bignum input
, struct RSAKey
*key
);
62 void rsasign(unsigned char *data
, int length
, struct RSAKey
*key
);
63 void rsasanitise(struct RSAKey
*key
);
64 int rsastr_len(struct RSAKey
*key
);
65 void rsastr_fmt(char *str
, struct RSAKey
*key
);
66 void rsa_fingerprint(char *str
, int len
, struct RSAKey
*key
);
67 int rsa_verify(struct RSAKey
*key
);
68 unsigned char *rsa_public_blob(struct RSAKey
*key
, int *len
);
69 int rsa_public_blob_len(void *data
);
70 void freersakey(struct RSAKey
*key
);
72 typedef unsigned int word32
;
73 typedef unsigned int uint32
;
75 unsigned long crc32(const void *s
, size_t len
);
76 unsigned long crc32_update(unsigned long crc_input
, const void *s
, size_t len
);
78 /* SSH CRC compensation attack detector */
79 void *crcda_make_context(void);
80 void crcda_free_context(void *handle
);
81 int detect_attack(void *handle
, unsigned char *buf
, uint32 len
,
93 unsigned char block
[64];
99 void MD5Init(struct MD5Context
*context
);
100 void MD5Update(struct MD5Context
*context
, unsigned char const *buf
,
102 void MD5Final(unsigned char digest
[16], struct MD5Context
*context
);
106 unsigned char block
[64];
110 void SHA_Init(SHA_State
* s
);
111 void SHA_Bytes(SHA_State
* s
, void *p
, int len
);
112 void SHA_Final(SHA_State
* s
, unsigned char *output
);
113 void SHA_Simple(void *p
, int len
, unsigned char *output
);
115 void hmac_sha1_simple(void *key
, int keylen
, void *data
, int datalen
,
116 unsigned char *output
);
120 unsigned char block
[128];
124 void SHA512_Init(SHA512_State
* s
);
125 void SHA512_Bytes(SHA512_State
* s
, const void *p
, int len
);
126 void SHA512_Final(SHA512_State
* s
, unsigned char *output
);
127 void SHA512_Simple(const void *p
, int len
, unsigned char *output
);
130 void *(*make_context
)(void);
131 void (*free_context
)(void *);
132 void (*sesskey
) (void *, unsigned char *key
); /* for ssh 1 */
133 void (*encrypt
) (void *, unsigned char *blk
, int len
);
134 void (*decrypt
) (void *, unsigned char *blk
, int len
);
140 void *(*make_context
)(void);
141 void (*free_context
)(void *);
142 void (*setiv
) (void *, unsigned char *key
); /* for ssh 2 */
143 void (*setkey
) (void *, unsigned char *key
);/* for ssh 2 */
144 void (*encrypt
) (void *, unsigned char *blk
, int len
);
145 void (*decrypt
) (void *, unsigned char *blk
, int len
);
152 struct ssh2_ciphers
{
154 const struct ssh2_cipher
*const *list
;
158 void *(*make_context
)(void);
159 void (*free_context
)(void *);
160 void (*setkey
) (void *, unsigned char *key
);
161 void (*generate
) (void *, unsigned char *blk
, int len
, unsigned long seq
);
162 int (*verify
) (void *, unsigned char *blk
, int len
, unsigned long seq
);
169 * Plugging in another KEX algorithm requires structural chaos,
170 * so it's hard to abstract them into nice little structures
171 * like this. Hence, for the moment, this is just a
172 * placeholder. I claim justification in the fact that OpenSSH
179 void *(*newkey
) (char *data
, int len
);
180 void (*freekey
) (void *key
);
181 char *(*fmtkey
) (void *key
);
182 unsigned char *(*public_blob
) (void *key
, int *len
);
183 unsigned char *(*private_blob
) (void *key
, int *len
);
184 void *(*createkey
) (unsigned char *pub_blob
, int pub_len
,
185 unsigned char *priv_blob
, int priv_len
);
186 void *(*openssh_createkey
) (unsigned char **blob
, int *len
);
187 int (*openssh_fmtkey
) (void *key
, unsigned char *blob
, int len
);
188 char *(*fingerprint
) (void *key
);
189 int (*verifysig
) (void *key
, char *sig
, int siglen
,
190 char *data
, int datalen
);
191 unsigned char *(*sign
) (void *key
, char *data
, int datalen
,
194 char *keytype
; /* for host key cache */
197 struct ssh_compress
{
199 void *(*compress_init
) (void);
200 void (*compress_cleanup
) (void *);
201 int (*compress
) (void *, unsigned char *block
, int len
,
202 unsigned char **outblock
, int *outlen
);
203 void *(*decompress_init
) (void);
204 void (*decompress_cleanup
) (void *);
205 int (*decompress
) (void *, unsigned char *block
, int len
,
206 unsigned char **outblock
, int *outlen
);
207 int (*disable_compression
) (void *);
211 struct ssh2_userkey
{
212 const struct ssh_signkey
*alg
; /* the key algorithm */
213 void *data
; /* the key data */
214 char *comment
; /* the key comment */
217 extern const struct ssh_cipher ssh_3des
;
218 extern const struct ssh_cipher ssh_des
;
219 extern const struct ssh_cipher ssh_blowfish_ssh1
;
220 extern const struct ssh2_ciphers ssh2_3des
;
221 extern const struct ssh2_ciphers ssh2_des
;
222 extern const struct ssh2_ciphers ssh2_aes
;
223 extern const struct ssh2_ciphers ssh2_blowfish
;
224 extern const struct ssh_kex ssh_diffiehellman
;
225 extern const struct ssh_kex ssh_diffiehellman_gex
;
226 extern const struct ssh_signkey ssh_dss
;
227 extern const struct ssh_signkey ssh_rsa
;
228 extern const struct ssh_mac ssh_md5
;
229 extern const struct ssh_mac ssh_sha1
;
230 extern const struct ssh_mac ssh_sha1_buggy
;
233 * PuTTY version number formatted as an SSH version string.
235 extern char sshver
[];
238 * Gross hack: pscp will try to start SFTP but fall back to scp1 if
239 * that fails. This variable is the means by which scp.c can reach
240 * into the SSH code and find out which one it got.
242 extern int ssh_fallback_cmd(void *handle
);
245 void SHATransform(word32
* digest
, word32
* data
);
248 int random_byte(void);
249 void random_add_noise(void *noise
, int length
);
250 void random_add_heavynoise(void *noise
, int length
);
252 void logevent(void *, char *);
254 /* Allocate and register a new channel for port forwarding */
255 void *new_sock_channel(void *handle
, Socket s
);
256 void ssh_send_port_open(void *channel
, char *hostname
, int port
, char *org
);
258 /* Exports from portfwd.c */
259 extern char *pfd_newconnect(Socket
* s
, char *hostname
, int port
, void *c
);
260 extern char *pfd_addforward(char *desthost
, int destport
, char *srcaddr
,
261 int port
, void *backhandle
);
262 extern void pfd_close(Socket s
);
263 extern int pfd_send(Socket s
, char *data
, int len
);
264 extern void pfd_confirm(Socket s
);
265 extern void pfd_unthrottle(Socket s
);
266 extern void pfd_override_throttle(Socket s
, int enable
);
268 /* Exports from x11fwd.c */
269 extern char *x11_init(Socket
*, char *, void *, void *);
270 extern void x11_close(Socket
);
271 extern int x11_send(Socket
, char *, int);
272 extern void *x11_invent_auth(char *, int, char *, int);
273 extern void x11_unthrottle(Socket s
);
274 extern void x11_override_throttle(Socket s
, int enable
);
275 extern int x11_get_screen_number(char *display
);
277 Bignum
copybn(Bignum b
);
278 Bignum
bn_power_2(int n
);
279 void bn_restore_invariant(Bignum b
);
280 Bignum
bignum_from_long(unsigned long n
);
281 void freebn(Bignum b
);
282 Bignum
modpow(Bignum base
, Bignum exp
, Bignum mod
);
283 Bignum
modmul(Bignum a
, Bignum b
, Bignum mod
);
284 void decbn(Bignum n
);
285 extern Bignum Zero
, One
;
286 Bignum
bignum_from_bytes(const unsigned char *data
, int nbytes
);
287 int ssh1_read_bignum(const unsigned char *data
, Bignum
* result
);
288 int bignum_bitcount(Bignum bn
);
289 int ssh1_bignum_length(Bignum bn
);
290 int ssh2_bignum_length(Bignum bn
);
291 int bignum_byte(Bignum bn
, int i
);
292 int bignum_bit(Bignum bn
, int i
);
293 void bignum_set_bit(Bignum bn
, int i
, int value
);
294 int ssh1_write_bignum(void *data
, Bignum bn
);
295 Bignum
biggcd(Bignum a
, Bignum b
);
296 unsigned short bignum_mod_short(Bignum number
, unsigned short modulus
);
297 Bignum
bignum_add_long(Bignum number
, unsigned long addend
);
298 Bignum
bigmul(Bignum a
, Bignum b
);
299 Bignum
bigmuladd(Bignum a
, Bignum b
, Bignum addend
);
300 Bignum
bigdiv(Bignum a
, Bignum b
);
301 Bignum
bigmod(Bignum a
, Bignum b
);
302 Bignum
modinv(Bignum number
, Bignum modulus
);
303 Bignum
bignum_bitmask(Bignum number
);
304 Bignum
bignum_rshift(Bignum number
, int shift
);
305 int bignum_cmp(Bignum a
, Bignum b
);
306 char *bignum_decimal(Bignum x
);
308 void *dh_setup_group1(void);
309 void *dh_setup_group(Bignum pval
, Bignum gval
);
310 void dh_cleanup(void *);
311 Bignum
dh_create_e(void *, int nbits
);
312 Bignum
dh_find_K(void *, Bignum f
);
314 int loadrsakey(char *filename
, struct RSAKey
*key
, char *passphrase
);
315 int rsakey_encrypted(char *filename
, char **comment
);
316 int rsakey_pubblob(char *filename
, void **blob
, int *bloblen
);
318 int saversakey(char *filename
, struct RSAKey
*key
, char *passphrase
);
320 extern int base64_decode_atom(char *atom
, unsigned char *out
);
321 extern int base64_lines(int datalen
);
322 extern void base64_encode_atom(unsigned char *data
, int n
, char *out
);
323 extern void base64_encode(FILE *fp
, unsigned char *data
, int datalen
, int cpl
);
325 /* ssh2_load_userkey can return this as an error */
326 extern struct ssh2_userkey ssh2_wrong_passphrase
;
327 #define SSH2_WRONG_PASSPHRASE (&ssh2_wrong_passphrase)
329 int ssh2_userkey_encrypted(char *filename
, char **comment
);
330 struct ssh2_userkey
*ssh2_load_userkey(char *filename
, char *passphrase
);
331 char *ssh2_userkey_loadpub(char *filename
, char **algorithm
,
333 int ssh2_save_userkey(char *filename
, struct ssh2_userkey
*key
,
337 SSH_KEYTYPE_UNOPENABLE
,
339 SSH_KEYTYPE_SSH1
, SSH_KEYTYPE_SSH2
,
340 SSH_KEYTYPE_OPENSSH
, SSH_KEYTYPE_SSHCOM
342 int key_type(char *filename
);
343 char *key_type_to_str(int type
);
345 int import_possible(int type
);
346 int import_target_type(int type
);
347 int import_encrypted(char *filename
, int type
, char **comment
);
348 int import_ssh1(char *filename
, int type
, struct RSAKey
*key
,char *passphrase
);
349 struct ssh2_userkey
*import_ssh2(char *filename
, int type
, char *passphrase
);
350 int export_ssh1(char *filename
, int type
, struct RSAKey
*key
,char *passphrase
);
351 int export_ssh2(char *filename
, int type
,
352 struct ssh2_userkey
*key
, char *passphrase
);
354 void des3_decrypt_pubkey(unsigned char *key
, unsigned char *blk
, int len
);
355 void des3_encrypt_pubkey(unsigned char *key
, unsigned char *blk
, int len
);
356 void des3_decrypt_pubkey_ossh(unsigned char *key
, unsigned char *iv
,
357 unsigned char *blk
, int len
);
358 void des3_encrypt_pubkey_ossh(unsigned char *key
, unsigned char *iv
,
359 unsigned char *blk
, int len
);
360 void aes256_encrypt_pubkey(unsigned char *key
, unsigned char *blk
,
362 void aes256_decrypt_pubkey(unsigned char *key
, unsigned char *blk
,
366 * For progress updates in the key generation utility.
368 #define PROGFN_INITIALISE 1
369 #define PROGFN_LIN_PHASE 2
370 #define PROGFN_EXP_PHASE 3
371 #define PROGFN_PHASE_EXTENT 4
372 #define PROGFN_READY 5
373 #define PROGFN_PROGRESS 6
374 typedef void (*progfn_t
) (void *param
, int action
, int phase
, int progress
);
376 int rsa_generate(struct RSAKey
*key
, int bits
, progfn_t pfn
,
378 int dsa_generate(struct dss_key
*key
, int bits
, progfn_t pfn
,
380 Bignum
primegen(int bits
, int modulus
, int residue
, Bignum factor
,
381 int phase
, progfn_t pfn
, void *pfnparam
);
387 void *zlib_compress_init(void);
388 void zlib_compress_cleanup(void *);
389 void *zlib_decompress_init(void);
390 void zlib_decompress_cleanup(void *);
391 int zlib_compress_block(void *, unsigned char *block
, int len
,
392 unsigned char **outblock
, int *outlen
);
393 int zlib_decompress_block(void *, unsigned char *block
, int len
,
394 unsigned char **outblock
, int *outlen
);
397 * SSH1 agent messages.
399 #define SSH1_AGENTC_REQUEST_RSA_IDENTITIES 1
400 #define SSH1_AGENT_RSA_IDENTITIES_ANSWER 2
401 #define SSH1_AGENTC_RSA_CHALLENGE 3
402 #define SSH1_AGENT_RSA_RESPONSE 4
403 #define SSH1_AGENTC_ADD_RSA_IDENTITY 7
404 #define SSH1_AGENTC_REMOVE_RSA_IDENTITY 8
405 #define SSH1_AGENTC_REMOVE_ALL_RSA_IDENTITIES 9 /* openssh private? */
408 * Messages common to SSH1 and OpenSSH's SSH2.
410 #define SSH_AGENT_FAILURE 5
411 #define SSH_AGENT_SUCCESS 6
414 * OpenSSH's SSH2 agent messages.
416 #define SSH2_AGENTC_REQUEST_IDENTITIES 11
417 #define SSH2_AGENT_IDENTITIES_ANSWER 12
418 #define SSH2_AGENTC_SIGN_REQUEST 13
419 #define SSH2_AGENT_SIGN_RESPONSE 14
420 #define SSH2_AGENTC_ADD_IDENTITY 17
421 #define SSH2_AGENTC_REMOVE_IDENTITY 18
422 #define SSH2_AGENTC_REMOVE_ALL_IDENTITIES 19
425 * Need this to warn about support for the original SSH2 keyfile
428 void old_keyfile_warning(void);