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 */
197 * Plugging in another KEX algorithm requires structural chaos,
198 * so it's hard to abstract them into nice little structures
199 * like this. Fortunately, all our KEXes are basically
200 * Diffie-Hellman at the moment, so in this structure I simply
201 * parametrise the DH exchange a bit.
203 char *name, *groupname;
204 const unsigned char *pdata, *gdata;/* NULL means use group exchange */
206 const struct ssh_hash *hash;
211 const struct ssh_kex *const *list;
215 void *(*newkey) (char *data, int len);
216 void (*freekey) (void *key);
217 char *(*fmtkey) (void *key);
218 unsigned char *(*public_blob) (void *key, int *len);
219 unsigned char *(*private_blob) (void *key, int *len);
220 void *(*createkey) (unsigned char *pub_blob, int pub_len,
221 unsigned char *priv_blob, int priv_len);
222 void *(*openssh_createkey) (unsigned char **blob, int *len);
223 int (*openssh_fmtkey) (void *key, unsigned char *blob, int len);
224 int (*pubkey_bits) (void *blob, int len);
225 char *(*fingerprint) (void *key);
226 int (*verifysig) (void *key, char *sig, int siglen,
227 char *data, int datalen);
228 unsigned char *(*sign) (void *key, char *data, int datalen,
231 char *keytype; /* for host key cache */
234 struct ssh_compress {
236 void *(*compress_init) (void);
237 void (*compress_cleanup) (void *);
238 int (*compress) (void *, unsigned char *block, int len,
239 unsigned char **outblock, int *outlen);
240 void *(*decompress_init) (void);
241 void (*decompress_cleanup) (void *);
242 int (*decompress) (void *, unsigned char *block, int len,
243 unsigned char **outblock, int *outlen);
244 int (*disable_compression) (void *);
248 struct ssh2_userkey {
249 const struct ssh_signkey *alg; /* the key algorithm */
250 void *data; /* the key data */
251 char *comment; /* the key comment */
254 extern const struct ssh_cipher ssh_3des;
255 extern const struct ssh_cipher ssh_des;
256 extern const struct ssh_cipher ssh_blowfish_ssh1;
257 extern const struct ssh2_ciphers ssh2_3des;
258 extern const struct ssh2_ciphers ssh2_des;
259 extern const struct ssh2_ciphers ssh2_aes;
260 extern const struct ssh2_ciphers ssh2_blowfish;
261 extern const struct ssh2_ciphers ssh2_arcfour;
262 extern const struct ssh_hash ssh_sha1;
263 extern const struct ssh_hash ssh_sha256;
264 extern const struct ssh_kexes ssh_diffiehellman_group1;
265 extern const struct ssh_kexes ssh_diffiehellman_group14;
266 extern const struct ssh_kexes ssh_diffiehellman_gex;
267 extern const struct ssh_signkey ssh_dss;
268 extern const struct ssh_signkey ssh_rsa;
269 extern const struct ssh_mac ssh_hmac_md5;
270 extern const struct ssh_mac ssh_hmac_sha1;
271 extern const struct ssh_mac ssh_hmac_sha1_buggy;
275 * PuTTY version number formatted as an SSH version string.
277 extern char sshver[];
280 * Gross hack: pscp will try to start SFTP but fall back to scp1 if
281 * that fails. This variable is the means by which scp.c can reach
282 * into the SSH code and find out which one it got.
284 extern int ssh_fallback_cmd(void *handle);
287 void SHATransform(word32 * digest, word32 * data);
290 int random_byte(void);
291 void random_add_noise(void *noise, int length);
292 void random_add_heavynoise(void *noise, int length);
294 void logevent(void *, const char *);
296 /* Allocate and register a new channel for port forwarding */
297 void *new_sock_channel(void *handle, Socket s);
298 void ssh_send_port_open(void *channel, char *hostname, int port, char *org);
300 /* Exports from portfwd.c */
301 extern const char *pfd_newconnect(Socket * s, char *hostname, int port,
302 void *c, const Config *cfg,
304 /* desthost == NULL indicates dynamic (SOCKS) port forwarding */
305 extern const char *pfd_addforward(char *desthost, int destport, char *srcaddr,
306 int port, void *backhandle,
307 const Config *cfg, void **sockdata,
309 extern void pfd_close(Socket s);
310 extern void pfd_terminate(void *sockdata);
311 extern int pfd_send(Socket s, char *data, int len);
312 extern void pfd_confirm(Socket s);
313 extern void pfd_unthrottle(Socket s);
314 extern void pfd_override_throttle(Socket s, int enable);
316 /* Exports from x11fwd.c */
317 extern const char *x11_init(Socket *, char *, void *, void *, const char *,
318 int, const Config *);
319 extern void x11_close(Socket);
320 extern int x11_send(Socket, char *, int);
321 extern void *x11_invent_auth(char *, int, char *, int, int);
322 extern void x11_free_auth(void *);
323 extern void x11_unthrottle(Socket s);
324 extern void x11_override_throttle(Socket s, int enable);
325 extern int x11_get_screen_number(char *display);
326 void x11_get_real_auth(void *authv, char *display);
327 char *x11_display(const char *display);
329 /* Platform-dependent X11 functions */
330 extern void platform_get_x11_auth(char *display, int *proto,
331 unsigned char *data, int *datalen);
332 extern const char platform_x11_best_transport[];
333 /* best X11 hostname for this platform if none specified */
334 SockAddr platform_get_x11_unix_address(int displaynum, char **canonicalname);
335 /* make up a SockAddr naming the address for displaynum */
336 char *platform_get_x_display(void);
337 /* allocated local X display string, if any */
339 Bignum copybn(Bignum b);
340 Bignum bn_power_2(int n);
341 void bn_restore_invariant(Bignum b);
342 Bignum bignum_from_long(unsigned long n);
343 void freebn(Bignum b);
344 Bignum modpow(Bignum base, Bignum exp, Bignum mod);
345 Bignum modmul(Bignum a, Bignum b, Bignum mod);
346 void decbn(Bignum n);
347 extern Bignum Zero, One;
348 Bignum bignum_from_bytes(const unsigned char *data, int nbytes);
349 int ssh1_read_bignum(const unsigned char *data, int len, Bignum * result);
350 int bignum_bitcount(Bignum bn);
351 int ssh1_bignum_length(Bignum bn);
352 int ssh2_bignum_length(Bignum bn);
353 int bignum_byte(Bignum bn, int i);
354 int bignum_bit(Bignum bn, int i);
355 void bignum_set_bit(Bignum bn, int i, int value);
356 int ssh1_write_bignum(void *data, Bignum bn);
357 Bignum biggcd(Bignum a, Bignum b);
358 unsigned short bignum_mod_short(Bignum number, unsigned short modulus);
359 Bignum bignum_add_long(Bignum number, unsigned long addend);
360 Bignum bigmul(Bignum a, Bignum b);
361 Bignum bigmuladd(Bignum a, Bignum b, Bignum addend);
362 Bignum bigdiv(Bignum a, Bignum b);
363 Bignum bigmod(Bignum a, Bignum b);
364 Bignum modinv(Bignum number, Bignum modulus);
365 Bignum bignum_bitmask(Bignum number);
366 Bignum bignum_rshift(Bignum number, int shift);
367 int bignum_cmp(Bignum a, Bignum b);
368 char *bignum_decimal(Bignum x);
371 void diagbn(char *prefix, Bignum md);
374 void *dh_setup_group(const struct ssh_kex *kex);
375 void *dh_setup_gex(Bignum pval, Bignum gval);
376 void dh_cleanup(void *);
377 Bignum dh_create_e(void *, int nbits);
378 Bignum dh_find_K(void *, Bignum f);
380 int loadrsakey(const Filename *filename, struct RSAKey *key,
381 char *passphrase, const char **errorstr);
382 int rsakey_encrypted(const Filename *filename, char **comment);
383 int rsakey_pubblob(const Filename *filename, void **blob, int *bloblen,
384 const char **errorstr);
386 int saversakey(const Filename *filename, struct RSAKey *key, char *passphrase);
388 extern int base64_decode_atom(char *atom, unsigned char *out);
389 extern int base64_lines(int datalen);
390 extern void base64_encode_atom(unsigned char *data, int n, char *out);
391 extern void base64_encode(FILE *fp, unsigned char *data, int datalen, int cpl);
393 /* ssh2_load_userkey can return this as an error */
394 extern struct ssh2_userkey ssh2_wrong_passphrase;
395 #define SSH2_WRONG_PASSPHRASE (&ssh2_wrong_passphrase)
397 int ssh2_userkey_encrypted(const Filename *filename, char **comment);
398 struct ssh2_userkey *ssh2_load_userkey(const Filename *filename,
399 char *passphrase, const char **errorstr);
400 char *ssh2_userkey_loadpub(const Filename *filename, char **algorithm,
401 int *pub_blob_len, const char **errorstr);
402 int ssh2_save_userkey(const Filename *filename, struct ssh2_userkey *key,
404 const struct ssh_signkey *find_pubkey_alg(const char *name);
407 SSH_KEYTYPE_UNOPENABLE,
409 SSH_KEYTYPE_SSH1, SSH_KEYTYPE_SSH2,
410 SSH_KEYTYPE_OPENSSH, SSH_KEYTYPE_SSHCOM
412 int key_type(const Filename *filename);
413 char *key_type_to_str(int type);
415 int import_possible(int type);
416 int import_target_type(int type);
417 int import_encrypted(const Filename *filename, int type, char **comment);
418 int import_ssh1(const Filename *filename, int type,
419 struct RSAKey *key, char *passphrase, const char **errmsg_p);
420 struct ssh2_userkey *import_ssh2(const Filename *filename, int type,
421 char *passphrase, const char **errmsg_p);
422 int export_ssh1(const Filename *filename, int type,
423 struct RSAKey *key, char *passphrase);
424 int export_ssh2(const Filename *filename, int type,
425 struct ssh2_userkey *key, char *passphrase);
427 void des3_decrypt_pubkey(unsigned char *key, unsigned char *blk, int len);
428 void des3_encrypt_pubkey(unsigned char *key, unsigned char *blk, int len);
429 void des3_decrypt_pubkey_ossh(unsigned char *key, unsigned char *iv,
430 unsigned char *blk, int len);
431 void des3_encrypt_pubkey_ossh(unsigned char *key, unsigned char *iv,
432 unsigned char *blk, int len);
433 void aes256_encrypt_pubkey(unsigned char *key, unsigned char *blk,
435 void aes256_decrypt_pubkey(unsigned char *key, unsigned char *blk,
438 void des_encrypt_xdmauth(unsigned char *key, unsigned char *blk, int len);
439 void des_decrypt_xdmauth(unsigned char *key, unsigned char *blk, int len);
442 * For progress updates in the key generation utility.
444 #define PROGFN_INITIALISE 1
445 #define PROGFN_LIN_PHASE 2
446 #define PROGFN_EXP_PHASE 3
447 #define PROGFN_PHASE_EXTENT 4
448 #define PROGFN_READY 5
449 #define PROGFN_PROGRESS 6
450 typedef void (*progfn_t) (void *param, int action, int phase, int progress);
452 int rsa_generate(struct RSAKey *key, int bits, progfn_t pfn,
454 int dsa_generate(struct dss_key *key, int bits, progfn_t pfn,
456 Bignum primegen(int bits, int modulus, int residue, Bignum factor,
457 int phase, progfn_t pfn, void *pfnparam);
463 void *zlib_compress_init(void);
464 void zlib_compress_cleanup(void *);
465 void *zlib_decompress_init(void);
466 void zlib_decompress_cleanup(void *);
467 int zlib_compress_block(void *, unsigned char *block, int len,
468 unsigned char **outblock, int *outlen);
469 int zlib_decompress_block(void *, unsigned char *block, int len,
470 unsigned char **outblock, int *outlen);
473 * SSH-1 agent messages.
475 #define SSH1_AGENTC_REQUEST_RSA_IDENTITIES 1
476 #define SSH1_AGENT_RSA_IDENTITIES_ANSWER 2
477 #define SSH1_AGENTC_RSA_CHALLENGE 3
478 #define SSH1_AGENT_RSA_RESPONSE 4
479 #define SSH1_AGENTC_ADD_RSA_IDENTITY 7
480 #define SSH1_AGENTC_REMOVE_RSA_IDENTITY 8
481 #define SSH1_AGENTC_REMOVE_ALL_RSA_IDENTITIES 9 /* openssh private? */
484 * Messages common to SSH-1 and OpenSSH's SSH-2.
486 #define SSH_AGENT_FAILURE 5
487 #define SSH_AGENT_SUCCESS 6
490 * OpenSSH's SSH-2 agent messages.
492 #define SSH2_AGENTC_REQUEST_IDENTITIES 11
493 #define SSH2_AGENT_IDENTITIES_ANSWER 12
494 #define SSH2_AGENTC_SIGN_REQUEST 13
495 #define SSH2_AGENT_SIGN_RESPONSE 14
496 #define SSH2_AGENTC_ADD_IDENTITY 17
497 #define SSH2_AGENTC_REMOVE_IDENTITY 18
498 #define SSH2_AGENTC_REMOVE_ALL_IDENTITIES 19
501 * Need this to warn about support for the original SSH-2 keyfile
504 void old_keyfile_warning(void);