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,
261 extern char *pfd_addforward(char *desthost, int destport, char *srcaddr,
262 int port, void *backhandle, const Config *cfg);
263 extern void pfd_close(Socket s);
264 extern int pfd_send(Socket s, char *data, int len);
265 extern void pfd_confirm(Socket s);
266 extern void pfd_unthrottle(Socket s);
267 extern void pfd_override_throttle(Socket s, int enable);
269 /* Exports from x11fwd.c */
270 extern char *x11_init(Socket *, char *, void *, void *, const char *, int,
272 extern void x11_close(Socket);
273 extern int x11_send(Socket, char *, int);
274 extern void *x11_invent_auth(char *, int, char *, int, int);
275 extern void x11_free_auth(void *);
276 extern void x11_unthrottle(Socket s);
277 extern void x11_override_throttle(Socket s, int enable);
278 extern int x11_get_screen_number(char *display);
279 void x11_get_real_auth(void *authv, char *display);
281 /* Platfdorm-dependent X11 function */
282 extern void platform_get_x11_auth(char *display, int *proto,
283 unsigned char *data, int *datalen);
285 Bignum copybn(Bignum b);
286 Bignum bn_power_2(int n);
287 void bn_restore_invariant(Bignum b);
288 Bignum bignum_from_long(unsigned long n);
289 void freebn(Bignum b);
290 Bignum modpow(Bignum base, Bignum exp, Bignum mod);
291 Bignum modmul(Bignum a, Bignum b, Bignum mod);
292 void decbn(Bignum n);
293 extern Bignum Zero, One;
294 Bignum bignum_from_bytes(const unsigned char *data, int nbytes);
295 int ssh1_read_bignum(const unsigned char *data, Bignum * result);
296 int bignum_bitcount(Bignum bn);
297 int ssh1_bignum_length(Bignum bn);
298 int ssh2_bignum_length(Bignum bn);
299 int bignum_byte(Bignum bn, int i);
300 int bignum_bit(Bignum bn, int i);
301 void bignum_set_bit(Bignum bn, int i, int value);
302 int ssh1_write_bignum(void *data, Bignum bn);
303 Bignum biggcd(Bignum a, Bignum b);
304 unsigned short bignum_mod_short(Bignum number, unsigned short modulus);
305 Bignum bignum_add_long(Bignum number, unsigned long addend);
306 Bignum bigmul(Bignum a, Bignum b);
307 Bignum bigmuladd(Bignum a, Bignum b, Bignum addend);
308 Bignum bigdiv(Bignum a, Bignum b);
309 Bignum bigmod(Bignum a, Bignum b);
310 Bignum modinv(Bignum number, Bignum modulus);
311 Bignum bignum_bitmask(Bignum number);
312 Bignum bignum_rshift(Bignum number, int shift);
313 int bignum_cmp(Bignum a, Bignum b);
314 char *bignum_decimal(Bignum x);
316 void *dh_setup_group1(void);
317 void *dh_setup_group(Bignum pval, Bignum gval);
318 void dh_cleanup(void *);
319 Bignum dh_create_e(void *, int nbits);
320 Bignum dh_find_K(void *, Bignum f);
322 int loadrsakey(char *filename, struct RSAKey *key, char *passphrase);
323 int rsakey_encrypted(char *filename, char **comment);
324 int rsakey_pubblob(char *filename, void **blob, int *bloblen);
326 int saversakey(char *filename, struct RSAKey *key, char *passphrase);
328 extern int base64_decode_atom(char *atom, unsigned char *out);
329 extern int base64_lines(int datalen);
330 extern void base64_encode_atom(unsigned char *data, int n, char *out);
331 extern void base64_encode(FILE *fp, unsigned char *data, int datalen, int cpl);
333 /* ssh2_load_userkey can return this as an error */
334 extern struct ssh2_userkey ssh2_wrong_passphrase;
335 #define SSH2_WRONG_PASSPHRASE (&ssh2_wrong_passphrase)
337 int ssh2_userkey_encrypted(char *filename, char **comment);
338 struct ssh2_userkey *ssh2_load_userkey(char *filename, char *passphrase);
339 char *ssh2_userkey_loadpub(char *filename, char **algorithm,
341 int ssh2_save_userkey(char *filename, struct ssh2_userkey *key,
345 SSH_KEYTYPE_UNOPENABLE,
347 SSH_KEYTYPE_SSH1, SSH_KEYTYPE_SSH2,
348 SSH_KEYTYPE_OPENSSH, SSH_KEYTYPE_SSHCOM
350 int key_type(char *filename);
351 char *key_type_to_str(int type);
353 int import_possible(int type);
354 int import_target_type(int type);
355 int import_encrypted(char *filename, int type, char **comment);
356 int import_ssh1(char *filename, int type, struct RSAKey *key,char *passphrase);
357 struct ssh2_userkey *import_ssh2(char *filename, int type, char *passphrase);
358 int export_ssh1(char *filename, int type, struct RSAKey *key,char *passphrase);
359 int export_ssh2(char *filename, int type,
360 struct ssh2_userkey *key, char *passphrase);
362 void des3_decrypt_pubkey(unsigned char *key, unsigned char *blk, int len);
363 void des3_encrypt_pubkey(unsigned char *key, unsigned char *blk, int len);
364 void des3_decrypt_pubkey_ossh(unsigned char *key, unsigned char *iv,
365 unsigned char *blk, int len);
366 void des3_encrypt_pubkey_ossh(unsigned char *key, unsigned char *iv,
367 unsigned char *blk, int len);
368 void aes256_encrypt_pubkey(unsigned char *key, unsigned char *blk,
370 void aes256_decrypt_pubkey(unsigned char *key, unsigned char *blk,
373 void des_encrypt_xdmauth(unsigned char *key, unsigned char *blk, int len);
374 void des_decrypt_xdmauth(unsigned char *key, unsigned char *blk, int len);
377 * For progress updates in the key generation utility.
379 #define PROGFN_INITIALISE 1
380 #define PROGFN_LIN_PHASE 2
381 #define PROGFN_EXP_PHASE 3
382 #define PROGFN_PHASE_EXTENT 4
383 #define PROGFN_READY 5
384 #define PROGFN_PROGRESS 6
385 typedef void (*progfn_t) (void *param, int action, int phase, int progress);
387 int rsa_generate(struct RSAKey *key, int bits, progfn_t pfn,
389 int dsa_generate(struct dss_key *key, int bits, progfn_t pfn,
391 Bignum primegen(int bits, int modulus, int residue, Bignum factor,
392 int phase, progfn_t pfn, void *pfnparam);
398 void *zlib_compress_init(void);
399 void zlib_compress_cleanup(void *);
400 void *zlib_decompress_init(void);
401 void zlib_decompress_cleanup(void *);
402 int zlib_compress_block(void *, unsigned char *block, int len,
403 unsigned char **outblock, int *outlen);
404 int zlib_decompress_block(void *, unsigned char *block, int len,
405 unsigned char **outblock, int *outlen);
408 * SSH1 agent messages.
410 #define SSH1_AGENTC_REQUEST_RSA_IDENTITIES 1
411 #define SSH1_AGENT_RSA_IDENTITIES_ANSWER 2
412 #define SSH1_AGENTC_RSA_CHALLENGE 3
413 #define SSH1_AGENT_RSA_RESPONSE 4
414 #define SSH1_AGENTC_ADD_RSA_IDENTITY 7
415 #define SSH1_AGENTC_REMOVE_RSA_IDENTITY 8
416 #define SSH1_AGENTC_REMOVE_ALL_RSA_IDENTITIES 9 /* openssh private? */
419 * Messages common to SSH1 and OpenSSH's SSH2.
421 #define SSH_AGENT_FAILURE 5
422 #define SSH_AGENT_SUCCESS 6
425 * OpenSSH's SSH2 agent messages.
427 #define SSH2_AGENTC_REQUEST_IDENTITIES 11
428 #define SSH2_AGENT_IDENTITIES_ANSWER 12
429 #define SSH2_AGENTC_SIGN_REQUEST 13
430 #define SSH2_AGENT_SIGN_RESPONSE 14
431 #define SSH2_AGENTC_ADD_IDENTITY 17
432 #define SSH2_AGENTC_REMOVE_IDENTITY 18
433 #define SSH2_AGENTC_REMOVE_ALL_IDENTITIES 19
436 * Need this to warn about support for the original SSH2 keyfile
439 void old_keyfile_warning(void);