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 int detect_attack(unsigned char *buf
, uint32 len
, unsigned char *IV
);
89 unsigned char block
[64];
95 void MD5Init(struct MD5Context
*context
);
96 void MD5Update(struct MD5Context
*context
, unsigned char const *buf
,
98 void MD5Final(unsigned char digest
[16], struct MD5Context
*context
);
102 unsigned char block
[64];
106 void SHA_Init(SHA_State
* s
);
107 void SHA_Bytes(SHA_State
* s
, void *p
, int len
);
108 void SHA_Final(SHA_State
* s
, unsigned char *output
);
109 void SHA_Simple(void *p
, int len
, unsigned char *output
);
111 void hmac_sha1_simple(void *key
, int keylen
, void *data
, int datalen
,
112 unsigned char *output
);
116 unsigned char block
[128];
120 void SHA512_Init(SHA512_State
* s
);
121 void SHA512_Bytes(SHA512_State
* s
, const void *p
, int len
);
122 void SHA512_Final(SHA512_State
* s
, unsigned char *output
);
123 void SHA512_Simple(const void *p
, int len
, unsigned char *output
);
126 void (*sesskey
) (unsigned char *key
); /* for ssh 1 */
127 void (*encrypt
) (unsigned char *blk
, int len
);
128 void (*decrypt
) (unsigned char *blk
, int len
);
133 void (*setcsiv
) (unsigned char *key
); /* for ssh 2 */
134 void (*setcskey
) (unsigned char *key
); /* for ssh 2 */
135 void (*setsciv
) (unsigned char *key
); /* for ssh 2 */
136 void (*setsckey
) (unsigned char *key
); /* for ssh 2 */
137 void (*encrypt
) (unsigned char *blk
, int len
);
138 void (*decrypt
) (unsigned char *blk
, int len
);
144 struct ssh2_ciphers
{
146 const struct ssh2_cipher
*const *list
;
150 void (*setcskey
) (unsigned char *key
);
151 void (*setsckey
) (unsigned char *key
);
152 void (*generate
) (unsigned char *blk
, int len
, unsigned long seq
);
153 int (*verify
) (unsigned char *blk
, int len
, unsigned long seq
);
160 * Plugging in another KEX algorithm requires structural chaos,
161 * so it's hard to abstract them into nice little structures
162 * like this. Hence, for the moment, this is just a
163 * placeholder. I claim justification in the fact that OpenSSH
170 void *(*newkey
) (char *data
, int len
);
171 void (*freekey
) (void *key
);
172 char *(*fmtkey
) (void *key
);
173 unsigned char *(*public_blob
) (void *key
, int *len
);
174 unsigned char *(*private_blob
) (void *key
, int *len
);
175 void *(*createkey
) (unsigned char *pub_blob
, int pub_len
,
176 unsigned char *priv_blob
, int priv_len
);
177 void *(*openssh_createkey
) (unsigned char **blob
, int *len
);
178 int (*openssh_fmtkey
) (void *key
, unsigned char *blob
, int len
);
179 char *(*fingerprint
) (void *key
);
180 int (*verifysig
) (void *key
, char *sig
, int siglen
,
181 char *data
, int datalen
);
182 unsigned char *(*sign
) (void *key
, char *data
, int datalen
,
185 char *keytype
; /* for host key cache */
188 struct ssh_compress
{
190 void (*compress_init
) (void);
191 int (*compress
) (unsigned char *block
, int len
,
192 unsigned char **outblock
, int *outlen
);
193 void (*decompress_init
) (void);
194 int (*decompress
) (unsigned char *block
, int len
,
195 unsigned char **outblock
, int *outlen
);
196 int (*disable_compression
) (void);
199 struct ssh2_userkey
{
200 const struct ssh_signkey
*alg
; /* the key algorithm */
201 void *data
; /* the key data */
202 char *comment
; /* the key comment */
205 extern const struct ssh_cipher ssh_3des
;
206 extern const struct ssh_cipher ssh_des
;
207 extern const struct ssh_cipher ssh_blowfish_ssh1
;
208 extern const struct ssh2_ciphers ssh2_3des
;
209 extern const struct ssh2_ciphers ssh2_des
;
210 extern const struct ssh2_ciphers ssh2_aes
;
211 extern const struct ssh2_ciphers ssh2_blowfish
;
212 extern const struct ssh_kex ssh_diffiehellman
;
213 extern const struct ssh_kex ssh_diffiehellman_gex
;
214 extern const struct ssh_signkey ssh_dss
;
215 extern const struct ssh_signkey ssh_rsa
;
216 extern const struct ssh_mac ssh_md5
;
217 extern const struct ssh_mac ssh_sha1
;
218 extern const struct ssh_mac ssh_sha1_buggy
;
221 * PuTTY version number formatted as an SSH version string.
223 extern char sshver
[];
226 * Gross hack: pscp will try to start SFTP but fall back to scp1 if
227 * that fails. This variable is the means by which scp.c can reach
228 * into the SSH code and find out which one it got.
230 extern int ssh_fallback_cmd
;
233 void SHATransform(word32
* digest
, word32
* data
);
236 int random_byte(void);
237 void random_add_noise(void *noise
, int length
);
238 void random_add_heavynoise(void *noise
, int length
);
240 void logevent(char *);
241 void *new_sock_channel(Socket s
); // allocates and register a new channel for port forwarding
242 void ssh_send_port_open(void *channel
, char *hostname
, int port
, char *org
);
244 Bignum
copybn(Bignum b
);
245 Bignum
bn_power_2(int n
);
246 void bn_restore_invariant(Bignum b
);
247 Bignum
bignum_from_long(unsigned long n
);
248 void freebn(Bignum b
);
249 Bignum
modpow(Bignum base
, Bignum exp
, Bignum mod
);
250 Bignum
modmul(Bignum a
, Bignum b
, Bignum mod
);
251 void decbn(Bignum n
);
252 extern Bignum Zero
, One
;
253 Bignum
bignum_from_bytes(unsigned char *data
, int nbytes
);
254 int ssh1_read_bignum(unsigned char *data
, Bignum
* result
);
255 int bignum_bitcount(Bignum bn
);
256 int ssh1_bignum_length(Bignum bn
);
257 int ssh2_bignum_length(Bignum bn
);
258 int bignum_byte(Bignum bn
, int i
);
259 int bignum_bit(Bignum bn
, int i
);
260 void bignum_set_bit(Bignum bn
, int i
, int value
);
261 int ssh1_write_bignum(void *data
, Bignum bn
);
262 Bignum
biggcd(Bignum a
, Bignum b
);
263 unsigned short bignum_mod_short(Bignum number
, unsigned short modulus
);
264 Bignum
bignum_add_long(Bignum number
, unsigned long addend
);
265 Bignum
bigmul(Bignum a
, Bignum b
);
266 Bignum
bigmuladd(Bignum a
, Bignum b
, Bignum addend
);
267 Bignum
bigdiv(Bignum a
, Bignum b
);
268 Bignum
bigmod(Bignum a
, Bignum b
);
269 Bignum
modinv(Bignum number
, Bignum modulus
);
270 Bignum
bignum_bitmask(Bignum number
);
271 Bignum
bignum_rshift(Bignum number
, int shift
);
272 int bignum_cmp(Bignum a
, Bignum b
);
273 char *bignum_decimal(Bignum x
);
275 void dh_setup_group1(void);
276 void dh_setup_group(Bignum pval
, Bignum gval
);
277 void dh_cleanup(void);
278 Bignum
dh_create_e(int nbits
);
279 Bignum
dh_find_K(Bignum f
);
281 int loadrsakey(char *filename
, struct RSAKey
*key
, char *passphrase
);
282 int rsakey_encrypted(char *filename
, char **comment
);
283 int rsakey_pubblob(char *filename
, void **blob
, int *bloblen
);
285 int saversakey(char *filename
, struct RSAKey
*key
, char *passphrase
);
287 void base64_encode_atom(unsigned char *data
, int n
, char *out
);
289 /* ssh2_load_userkey can return this as an error */
290 extern struct ssh2_userkey ssh2_wrong_passphrase
;
291 #define SSH2_WRONG_PASSPHRASE (&ssh2_wrong_passphrase)
293 int ssh2_userkey_encrypted(char *filename
, char **comment
);
294 struct ssh2_userkey
*ssh2_load_userkey(char *filename
, char *passphrase
);
295 char *ssh2_userkey_loadpub(char *filename
, char **algorithm
,
297 int ssh2_save_userkey(char *filename
, struct ssh2_userkey
*key
,
301 SSH_KEYTYPE_UNOPENABLE
,
303 SSH_KEYTYPE_SSH1
, SSH_KEYTYPE_SSH2
,
304 SSH_KEYTYPE_OPENSSH
, SSH_KEYTYPE_SSHCOM
306 int key_type(char *filename
);
307 char *key_type_to_str(int type
);
309 int import_possible(int type
);
310 int import_target_type(int type
);
311 int import_encrypted(char *filename
, int type
, char **comment
);
312 int import_ssh1(char *filename
, int type
, struct RSAKey
*key
,char *passphrase
);
313 struct ssh2_userkey
*import_ssh2(char *filename
, int type
, char *passphrase
);
314 int export_ssh1(char *filename
, int type
, struct RSAKey
*key
,char *passphrase
);
315 int export_ssh2(char *filename
, int type
,
316 struct ssh2_userkey
*key
, char *passphrase
);
318 void des3_decrypt_pubkey(unsigned char *key
, unsigned char *blk
, int len
);
319 void des3_encrypt_pubkey(unsigned char *key
, unsigned char *blk
, int len
);
320 void des3_decrypt_pubkey_ossh(unsigned char *key
, unsigned char *iv
,
321 unsigned char *blk
, int len
);
322 void des3_encrypt_pubkey_ossh(unsigned char *key
, unsigned char *iv
,
323 unsigned char *blk
, int len
);
324 void aes256_encrypt_pubkey(unsigned char *key
, unsigned char *blk
,
326 void aes256_decrypt_pubkey(unsigned char *key
, unsigned char *blk
,
330 * For progress updates in the key generation utility.
332 #define PROGFN_INITIALISE 1
333 #define PROGFN_LIN_PHASE 2
334 #define PROGFN_EXP_PHASE 3
335 #define PROGFN_PHASE_EXTENT 4
336 #define PROGFN_READY 5
337 #define PROGFN_PROGRESS 6
338 typedef void (*progfn_t
) (void *param
, int action
, int phase
, int progress
);
340 int rsa_generate(struct RSAKey
*key
, int bits
, progfn_t pfn
,
342 int dsa_generate(struct dss_key
*key
, int bits
, progfn_t pfn
,
344 Bignum
primegen(int bits
, int modulus
, int residue
, Bignum factor
,
345 int phase
, progfn_t pfn
, void *pfnparam
);
351 void zlib_compress_init(void);
352 void zlib_decompress_init(void);
353 int zlib_compress_block(unsigned char *block
, int len
,
354 unsigned char **outblock
, int *outlen
);
355 int zlib_decompress_block(unsigned char *block
, int len
,
356 unsigned char **outblock
, int *outlen
);
359 * SSH1 agent messages.
361 #define SSH1_AGENTC_REQUEST_RSA_IDENTITIES 1
362 #define SSH1_AGENT_RSA_IDENTITIES_ANSWER 2
363 #define SSH1_AGENTC_RSA_CHALLENGE 3
364 #define SSH1_AGENT_RSA_RESPONSE 4
365 #define SSH1_AGENTC_ADD_RSA_IDENTITY 7
366 #define SSH1_AGENTC_REMOVE_RSA_IDENTITY 8
367 #define SSH1_AGENTC_REMOVE_ALL_RSA_IDENTITIES 9 /* openssh private? */
370 * Messages common to SSH1 and OpenSSH's SSH2.
372 #define SSH_AGENT_FAILURE 5
373 #define SSH_AGENT_SUCCESS 6
376 * OpenSSH's SSH2 agent messages.
378 #define SSH2_AGENTC_REQUEST_IDENTITIES 11
379 #define SSH2_AGENT_IDENTITIES_ANSWER 12
380 #define SSH2_AGENTC_SIGN_REQUEST 13
381 #define SSH2_AGENT_SIGN_RESPONSE 14
382 #define SSH2_AGENTC_ADD_IDENTITY 17
383 #define SSH2_AGENTC_REMOVE_IDENTITY 18
384 #define SSH2_AGENTC_REMOVE_ALL_IDENTITIES 19
387 * Need this to warn about support for the original SSH2 keyfile
390 void old_keyfile_warning(void);