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1 | #include <string.h> |
2 | |
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3 | #include "puttymem.h" |
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4 | #include "network.h" |
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5 | #include "int64.h" |
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6 | |
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7 | struct ssh_channel; |
8 | |
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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); |
12 | |
e5574168 |
13 | /* |
14 | * Useful thing. |
15 | */ |
16 | #ifndef lenof |
17 | #define lenof(x) ( (sizeof((x))) / (sizeof(*(x)))) |
18 | #endif |
19 | |
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20 | #define SSH_CIPHER_IDEA 1 |
9697bfd2 |
21 | #define SSH_CIPHER_DES 2 |
bea1ef5f |
22 | #define SSH_CIPHER_3DES 3 |
23 | #define SSH_CIPHER_BLOWFISH 6 |
24 | |
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25 | #ifdef MSCRYPTOAPI |
26 | #define APIEXTRA 8 |
27 | #else |
28 | #define APIEXTRA 0 |
29 | #endif |
30 | |
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31 | #ifndef BIGNUM_INTERNAL |
32 | typedef void *Bignum; |
33 | #endif |
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34 | |
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35 | struct RSAKey { |
36 | int bits; |
37 | int bytes; |
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38 | #ifdef MSCRYPTOAPI |
39 | unsigned long exponent; |
40 | unsigned char *modulus; |
41 | #else |
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42 | Bignum modulus; |
43 | Bignum exponent; |
44 | Bignum private_exponent; |
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45 | Bignum p; |
46 | Bignum q; |
47 | Bignum iqmp; |
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48 | #endif |
49 | char *comment; |
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50 | }; |
51 | |
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52 | struct dss_key { |
53 | Bignum p, q, g, y, x; |
54 | }; |
55 | |
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56 | int makekey(unsigned char *data, struct RSAKey *result, |
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57 | unsigned char **keystr, int order); |
58 | int makeprivate(unsigned char *data, struct RSAKey *result); |
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59 | void rsaencrypt(unsigned char *data, int length, struct RSAKey *key); |
7cca0d81 |
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); |
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63 | int rsastr_len(struct RSAKey *key); |
64 | void rsastr_fmt(char *str, struct RSAKey *key); |
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65 | void rsa_fingerprint(char *str, int len, struct RSAKey *key); |
014970c8 |
66 | int rsa_verify(struct RSAKey *key); |
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67 | unsigned char *rsa_public_blob(struct RSAKey *key, int *len); |
68 | int rsa_public_blob_len(void *data); |
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69 | void freersakey(struct RSAKey *key); |
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70 | |
71 | typedef unsigned int word32; |
72 | typedef unsigned int uint32; |
73 | |
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74 | unsigned long crc32(const void *s, size_t len); |
9a3a93a5 |
75 | unsigned long crc32_update(unsigned long crc_input, const void *s, size_t len); |
76 | |
77 | /* SSH CRC compensation attack detector */ |
78 | int detect_attack(unsigned char *buf, uint32 len, unsigned char *IV); |
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79 | |
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80 | typedef struct { |
81 | uint32 h[4]; |
82 | } MD5_Core_State; |
83 | |
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84 | struct MD5Context { |
8f203108 |
85 | #ifdef MSCRYPTOAPI |
86 | unsigned long hHash; |
87 | #else |
48672163 |
88 | MD5_Core_State core; |
bb093ca7 |
89 | unsigned char block[64]; |
48672163 |
90 | int blkused; |
91 | uint32 lenhi, lenlo; |
8f203108 |
92 | #endif |
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93 | }; |
94 | |
95 | void MD5Init(struct MD5Context *context); |
96 | void MD5Update(struct MD5Context *context, unsigned char const *buf, |
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97 | unsigned len); |
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98 | void MD5Final(unsigned char digest[16], struct MD5Context *context); |
99 | |
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100 | typedef struct { |
101 | uint32 h[5]; |
102 | unsigned char block[64]; |
103 | int blkused; |
104 | uint32 lenhi, lenlo; |
105 | } SHA_State; |
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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); |
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109 | void SHA_Simple(void *p, int len, unsigned char *output); |
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110 | |
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111 | void hmac_sha1_simple(void *key, int keylen, void *data, int datalen, |
112 | unsigned char *output); |
113 | |
114 | typedef struct { |
115 | uint64 h[8]; |
116 | unsigned char block[128]; |
117 | int blkused; |
118 | uint32 len[4]; |
119 | } SHA512_State; |
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); |
124 | |
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125 | struct ssh_cipher { |
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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); |
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129 | int blksize; |
130 | }; |
131 | |
132 | struct ssh2_cipher { |
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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); |
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139 | char *name; |
140 | int blksize; |
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141 | int keylen; |
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142 | }; |
143 | |
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144 | struct ssh2_ciphers { |
145 | int nciphers; |
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146 | const struct ssh2_cipher *const *list; |
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147 | }; |
148 | |
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149 | struct ssh_mac { |
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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); |
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154 | char *name; |
155 | int len; |
156 | }; |
157 | |
158 | struct ssh_kex { |
7cca0d81 |
159 | /* |
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 |
164 | * does this too :-) |
165 | */ |
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166 | char *name; |
167 | }; |
168 | |
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169 | struct ssh_signkey { |
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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, |
183 | int *siglen); |
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184 | char *name; |
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185 | char *keytype; /* for host key cache */ |
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186 | }; |
187 | |
188 | struct ssh_compress { |
189 | char *name; |
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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); |
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197 | }; |
198 | |
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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 */ |
203 | }; |
204 | |
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; |
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209 | extern const struct ssh2_ciphers ssh2_des; |
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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; |
219 | |
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220 | /* |
221 | * PuTTY version number formatted as an SSH version string. |
222 | */ |
223 | extern char sshver[]; |
224 | |
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225 | /* |
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. |
229 | */ |
230 | extern int ssh_fallback_cmd; |
231 | |
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232 | #ifndef MSCRYPTOAPI |
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233 | void SHATransform(word32 * digest, word32 * data); |
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234 | #endif |
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235 | |
236 | int random_byte(void); |
237 | void random_add_noise(void *noise, int length); |
6e522441 |
238 | void random_add_heavynoise(void *noise, int length); |
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239 | |
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240 | void logevent(char *); |
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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); |
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243 | |
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244 | Bignum copybn(Bignum b); |
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245 | Bignum bn_power_2(int n); |
246 | void bn_restore_invariant(Bignum b); |
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247 | Bignum bignum_from_long(unsigned long n); |
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248 | void freebn(Bignum b); |
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249 | Bignum modpow(Bignum base, Bignum exp, Bignum mod); |
250 | Bignum modmul(Bignum a, Bignum b, Bignum mod); |
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251 | void decbn(Bignum n); |
252 | extern Bignum Zero, One; |
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253 | Bignum bignum_from_bytes(unsigned char *data, int nbytes); |
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254 | int ssh1_read_bignum(unsigned char *data, Bignum * result); |
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255 | int bignum_bitcount(Bignum bn); |
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256 | int ssh1_bignum_length(Bignum bn); |
260f3dec |
257 | int ssh2_bignum_length(Bignum bn); |
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258 | int bignum_byte(Bignum bn, int i); |
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259 | int bignum_bit(Bignum bn, int i); |
260 | void bignum_set_bit(Bignum bn, int i, int value); |
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261 | int ssh1_write_bignum(void *data, Bignum bn); |
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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); |
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266 | Bignum bigmuladd(Bignum a, Bignum b, Bignum addend); |
267 | Bignum bigdiv(Bignum a, Bignum b); |
268 | Bignum bigmod(Bignum a, Bignum b); |
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269 | Bignum modinv(Bignum number, Bignum modulus); |
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270 | Bignum bignum_bitmask(Bignum number); |
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271 | Bignum bignum_rshift(Bignum number, int shift); |
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272 | int bignum_cmp(Bignum a, Bignum b); |
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273 | char *bignum_decimal(Bignum x); |
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274 | |
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275 | void dh_setup_group1(void); |
a92dd380 |
276 | void dh_setup_group(Bignum pval, Bignum gval); |
3709bfe9 |
277 | void dh_cleanup(void); |
7bd5a860 |
278 | Bignum dh_create_e(int nbits); |
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279 | Bignum dh_find_K(Bignum f); |
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280 | |
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281 | int loadrsakey(char *filename, struct RSAKey *key, char *passphrase); |
a52f067e |
282 | int rsakey_encrypted(char *filename, char **comment); |
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283 | int rsakey_pubblob(char *filename, void **blob, int *bloblen); |
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284 | |
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285 | int saversakey(char *filename, struct RSAKey *key, char *passphrase); |
286 | |
287 | void base64_encode_atom(unsigned char *data, int n, char *out); |
288 | |
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) |
292 | |
293 | int ssh2_userkey_encrypted(char *filename, char **comment); |
294 | struct ssh2_userkey *ssh2_load_userkey(char *filename, char *passphrase); |
32874aea |
295 | char *ssh2_userkey_loadpub(char *filename, char **algorithm, |
296 | int *pub_blob_len); |
297 | int ssh2_save_userkey(char *filename, struct ssh2_userkey *key, |
298 | char *passphrase); |
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299 | |
231ee168 |
300 | enum { |
301 | SSH_KEYTYPE_UNOPENABLE, |
302 | SSH_KEYTYPE_UNKNOWN, |
303 | SSH_KEYTYPE_SSH1, SSH_KEYTYPE_SSH2, |
304 | SSH_KEYTYPE_OPENSSH, SSH_KEYTYPE_SSHCOM |
305 | }; |
306 | int key_type(char *filename); |
307 | char *key_type_to_str(int type); |
6e522441 |
308 | |
9dda6459 |
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); |
4801c01c |
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); |
9dda6459 |
317 | |
65a22376 |
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); |
9dda6459 |
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); |
32874aea |
324 | void aes256_encrypt_pubkey(unsigned char *key, unsigned char *blk, |
325 | int len); |
326 | void aes256_decrypt_pubkey(unsigned char *key, unsigned char *blk, |
327 | int len); |
9400cf6f |
328 | |
329 | /* |
330 | * For progress updates in the key generation utility. |
331 | */ |
7c7f6893 |
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 |
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338 | typedef void (*progfn_t) (void *param, int action, int phase, int progress); |
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339 | |
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340 | int rsa_generate(struct RSAKey *key, int bits, progfn_t pfn, |
341 | void *pfnparam); |
5c72ca61 |
342 | int dsa_generate(struct dss_key *key, int bits, progfn_t pfn, |
343 | void *pfnparam); |
344 | Bignum primegen(int bits, int modulus, int residue, Bignum factor, |
345 | int phase, progfn_t pfn, void *pfnparam); |
4ba9b64b |
346 | |
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347 | |
4ba9b64b |
348 | /* |
349 | * zlib compression. |
350 | */ |
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); |
1983e559 |
357 | |
358 | /* |
359 | * SSH1 agent messages. |
360 | */ |
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 |
32874aea |
367 | #define SSH1_AGENTC_REMOVE_ALL_RSA_IDENTITIES 9 /* openssh private? */ |
1983e559 |
368 | |
369 | /* |
370 | * Messages common to SSH1 and OpenSSH's SSH2. |
371 | */ |
372 | #define SSH_AGENT_FAILURE 5 |
373 | #define SSH_AGENT_SUCCESS 6 |
374 | |
375 | /* |
376 | * OpenSSH's SSH2 agent messages. |
377 | */ |
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 |
7bedb13c |
385 | |
386 | /* |
387 | * Need this to warn about support for the original SSH2 keyfile |
388 | * format. |
389 | */ |
390 | void old_keyfile_warning(void); |