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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 | |
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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 |
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21 | #define SSH_CIPHER_DES 2 |
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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); |
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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); |
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66 | int rsa_verify(struct RSAKey *key); |
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67 | void freersakey(struct RSAKey *key); |
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68 | |
69 | typedef unsigned int word32; |
70 | typedef unsigned int uint32; |
71 | |
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72 | unsigned long crc32(const void *s, size_t len); |
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73 | |
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74 | typedef struct { |
75 | uint32 h[4]; |
76 | } MD5_Core_State; |
77 | |
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78 | struct MD5Context { |
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79 | #ifdef MSCRYPTOAPI |
80 | unsigned long hHash; |
81 | #else |
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82 | MD5_Core_State core; |
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83 | unsigned char block[64]; |
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84 | int blkused; |
85 | uint32 lenhi, lenlo; |
8f203108 |
86 | #endif |
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87 | }; |
88 | |
89 | void MD5Init(struct MD5Context *context); |
90 | void MD5Update(struct MD5Context *context, unsigned char const *buf, |
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91 | unsigned len); |
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92 | void MD5Final(unsigned char digest[16], struct MD5Context *context); |
93 | |
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94 | typedef struct { |
95 | uint32 h[5]; |
96 | unsigned char block[64]; |
97 | int blkused; |
98 | uint32 lenhi, lenlo; |
99 | } SHA_State; |
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100 | void SHA_Init(SHA_State * s); |
101 | void SHA_Bytes(SHA_State * s, void *p, int len); |
102 | void SHA_Final(SHA_State * s, unsigned char *output); |
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103 | void SHA_Simple(void *p, int len, unsigned char *output); |
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104 | |
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105 | void hmac_sha1_simple(void *key, int keylen, void *data, int datalen, |
106 | unsigned char *output); |
107 | |
108 | typedef struct { |
109 | uint64 h[8]; |
110 | unsigned char block[128]; |
111 | int blkused; |
112 | uint32 len[4]; |
113 | } SHA512_State; |
114 | void SHA512_Init(SHA512_State * s); |
115 | void SHA512_Bytes(SHA512_State * s, const void *p, int len); |
116 | void SHA512_Final(SHA512_State * s, unsigned char *output); |
117 | void SHA512_Simple(const void *p, int len, unsigned char *output); |
118 | |
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119 | struct ssh_cipher { |
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120 | void (*sesskey) (unsigned char *key); /* for ssh 1 */ |
121 | void (*encrypt) (unsigned char *blk, int len); |
122 | void (*decrypt) (unsigned char *blk, int len); |
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123 | int blksize; |
124 | }; |
125 | |
126 | struct ssh2_cipher { |
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127 | void (*setcsiv) (unsigned char *key); /* for ssh 2 */ |
128 | void (*setcskey) (unsigned char *key); /* for ssh 2 */ |
129 | void (*setsciv) (unsigned char *key); /* for ssh 2 */ |
130 | void (*setsckey) (unsigned char *key); /* for ssh 2 */ |
131 | void (*encrypt) (unsigned char *blk, int len); |
132 | void (*decrypt) (unsigned char *blk, int len); |
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133 | char *name; |
134 | int blksize; |
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135 | int keylen; |
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136 | }; |
137 | |
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138 | struct ssh2_ciphers { |
139 | int nciphers; |
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140 | const struct ssh2_cipher *const *list; |
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141 | }; |
142 | |
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143 | struct ssh_mac { |
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144 | void (*setcskey) (unsigned char *key); |
145 | void (*setsckey) (unsigned char *key); |
146 | void (*generate) (unsigned char *blk, int len, unsigned long seq); |
147 | int (*verify) (unsigned char *blk, int len, unsigned long seq); |
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148 | char *name; |
149 | int len; |
150 | }; |
151 | |
152 | struct ssh_kex { |
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153 | /* |
154 | * Plugging in another KEX algorithm requires structural chaos, |
155 | * so it's hard to abstract them into nice little structures |
156 | * like this. Hence, for the moment, this is just a |
157 | * placeholder. I claim justification in the fact that OpenSSH |
158 | * does this too :-) |
159 | */ |
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160 | char *name; |
161 | }; |
162 | |
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163 | struct ssh_signkey { |
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164 | void *(*newkey) (char *data, int len); |
165 | void (*freekey) (void *key); |
166 | char *(*fmtkey) (void *key); |
167 | unsigned char *(*public_blob) (void *key, int *len); |
168 | unsigned char *(*private_blob) (void *key, int *len); |
169 | void *(*createkey) (unsigned char *pub_blob, int pub_len, |
170 | unsigned char *priv_blob, int priv_len); |
171 | void *(*openssh_createkey) (unsigned char **blob, int *len); |
172 | int (*openssh_fmtkey) (void *key, unsigned char *blob, int len); |
173 | char *(*fingerprint) (void *key); |
174 | int (*verifysig) (void *key, char *sig, int siglen, |
175 | char *data, int datalen); |
176 | unsigned char *(*sign) (void *key, char *data, int datalen, |
177 | int *siglen); |
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178 | char *name; |
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179 | char *keytype; /* for host key cache */ |
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180 | }; |
181 | |
182 | struct ssh_compress { |
183 | char *name; |
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184 | void (*compress_init) (void); |
185 | int (*compress) (unsigned char *block, int len, |
186 | unsigned char **outblock, int *outlen); |
187 | void (*decompress_init) (void); |
188 | int (*decompress) (unsigned char *block, int len, |
189 | unsigned char **outblock, int *outlen); |
190 | int (*disable_compression) (void); |
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191 | }; |
192 | |
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193 | struct ssh2_userkey { |
194 | const struct ssh_signkey *alg; /* the key algorithm */ |
195 | void *data; /* the key data */ |
196 | char *comment; /* the key comment */ |
197 | }; |
198 | |
199 | extern const struct ssh_cipher ssh_3des; |
200 | extern const struct ssh_cipher ssh_des; |
201 | extern const struct ssh_cipher ssh_blowfish_ssh1; |
202 | extern const struct ssh2_ciphers ssh2_3des; |
203 | extern const struct ssh2_ciphers ssh2_aes; |
204 | extern const struct ssh2_ciphers ssh2_blowfish; |
205 | extern const struct ssh_kex ssh_diffiehellman; |
206 | extern const struct ssh_kex ssh_diffiehellman_gex; |
207 | extern const struct ssh_signkey ssh_dss; |
208 | extern const struct ssh_signkey ssh_rsa; |
209 | extern const struct ssh_mac ssh_md5; |
210 | extern const struct ssh_mac ssh_sha1; |
211 | extern const struct ssh_mac ssh_sha1_buggy; |
212 | |
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213 | /* |
214 | * PuTTY version number formatted as an SSH version string. |
215 | */ |
216 | extern char sshver[]; |
217 | |
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218 | /* |
219 | * Gross hack: pscp will try to start SFTP but fall back to scp1 if |
220 | * that fails. This variable is the means by which scp.c can reach |
221 | * into the SSH code and find out which one it got. |
222 | */ |
223 | extern int ssh_fallback_cmd; |
224 | |
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225 | #ifndef MSCRYPTOAPI |
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226 | void SHATransform(word32 * digest, word32 * data); |
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227 | #endif |
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228 | |
229 | int random_byte(void); |
230 | void random_add_noise(void *noise, int length); |
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231 | void random_add_heavynoise(void *noise, int length); |
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232 | |
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233 | void logevent(char *); |
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234 | void *new_sock_channel(Socket s); // allocates and register a new channel for port forwarding |
235 | void ssh_send_port_open(void *channel, char *hostname, int port, char *org); |
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236 | |
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237 | Bignum copybn(Bignum b); |
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238 | Bignum bn_power_2(int n); |
239 | void bn_restore_invariant(Bignum b); |
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240 | Bignum bignum_from_long(unsigned long n); |
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241 | void freebn(Bignum b); |
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242 | Bignum modpow(Bignum base, Bignum exp, Bignum mod); |
243 | Bignum modmul(Bignum a, Bignum b, Bignum mod); |
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244 | void decbn(Bignum n); |
245 | extern Bignum Zero, One; |
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246 | Bignum bignum_from_bytes(unsigned char *data, int nbytes); |
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247 | int ssh1_read_bignum(unsigned char *data, Bignum * result); |
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248 | int bignum_bitcount(Bignum bn); |
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249 | int ssh1_bignum_length(Bignum bn); |
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250 | int ssh2_bignum_length(Bignum bn); |
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251 | int bignum_byte(Bignum bn, int i); |
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252 | int bignum_bit(Bignum bn, int i); |
253 | void bignum_set_bit(Bignum bn, int i, int value); |
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254 | int ssh1_write_bignum(void *data, Bignum bn); |
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255 | Bignum biggcd(Bignum a, Bignum b); |
256 | unsigned short bignum_mod_short(Bignum number, unsigned short modulus); |
257 | Bignum bignum_add_long(Bignum number, unsigned long addend); |
258 | Bignum bigmul(Bignum a, Bignum b); |
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259 | Bignum bigmuladd(Bignum a, Bignum b, Bignum addend); |
260 | Bignum bigdiv(Bignum a, Bignum b); |
261 | Bignum bigmod(Bignum a, Bignum b); |
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262 | Bignum modinv(Bignum number, Bignum modulus); |
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263 | Bignum bignum_bitmask(Bignum number); |
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264 | Bignum bignum_rshift(Bignum number, int shift); |
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265 | int bignum_cmp(Bignum a, Bignum b); |
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266 | char *bignum_decimal(Bignum x); |
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267 | |
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268 | void dh_setup_group1(void); |
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269 | void dh_setup_group(Bignum pval, Bignum gval); |
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270 | void dh_cleanup(void); |
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271 | Bignum dh_create_e(int nbits); |
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272 | Bignum dh_find_K(Bignum f); |
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273 | |
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274 | int loadrsakey(char *filename, struct RSAKey *key, char *passphrase); |
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275 | int rsakey_encrypted(char *filename, char **comment); |
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276 | |
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277 | int saversakey(char *filename, struct RSAKey *key, char *passphrase); |
278 | |
279 | void base64_encode_atom(unsigned char *data, int n, char *out); |
280 | |
281 | /* ssh2_load_userkey can return this as an error */ |
282 | extern struct ssh2_userkey ssh2_wrong_passphrase; |
283 | #define SSH2_WRONG_PASSPHRASE (&ssh2_wrong_passphrase) |
284 | |
285 | int ssh2_userkey_encrypted(char *filename, char **comment); |
286 | struct ssh2_userkey *ssh2_load_userkey(char *filename, char *passphrase); |
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287 | char *ssh2_userkey_loadpub(char *filename, char **algorithm, |
288 | int *pub_blob_len); |
289 | int ssh2_save_userkey(char *filename, struct ssh2_userkey *key, |
290 | char *passphrase); |
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291 | |
292 | int keyfile_version(char *filename); |
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293 | |
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294 | void des3_decrypt_pubkey(unsigned char *key, unsigned char *blk, int len); |
295 | void des3_encrypt_pubkey(unsigned char *key, unsigned char *blk, int len); |
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296 | void aes256_encrypt_pubkey(unsigned char *key, unsigned char *blk, |
297 | int len); |
298 | void aes256_decrypt_pubkey(unsigned char *key, unsigned char *blk, |
299 | int len); |
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300 | |
301 | /* |
302 | * For progress updates in the key generation utility. |
303 | */ |
7c7f6893 |
304 | #define PROGFN_INITIALISE 1 |
305 | #define PROGFN_LIN_PHASE 2 |
306 | #define PROGFN_EXP_PHASE 3 |
307 | #define PROGFN_PHASE_EXTENT 4 |
308 | #define PROGFN_READY 5 |
309 | #define PROGFN_PROGRESS 6 |
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310 | typedef void (*progfn_t) (void *param, int action, int phase, int progress); |
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311 | |
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312 | int rsa_generate(struct RSAKey *key, int bits, progfn_t pfn, |
313 | void *pfnparam); |
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314 | int dsa_generate(struct dss_key *key, int bits, progfn_t pfn, |
315 | void *pfnparam); |
316 | Bignum primegen(int bits, int modulus, int residue, Bignum factor, |
317 | int phase, progfn_t pfn, void *pfnparam); |
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318 | |
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319 | |
4ba9b64b |
320 | /* |
321 | * zlib compression. |
322 | */ |
323 | void zlib_compress_init(void); |
324 | void zlib_decompress_init(void); |
325 | int zlib_compress_block(unsigned char *block, int len, |
326 | unsigned char **outblock, int *outlen); |
327 | int zlib_decompress_block(unsigned char *block, int len, |
328 | unsigned char **outblock, int *outlen); |
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329 | |
330 | /* |
331 | * SSH1 agent messages. |
332 | */ |
333 | #define SSH1_AGENTC_REQUEST_RSA_IDENTITIES 1 |
334 | #define SSH1_AGENT_RSA_IDENTITIES_ANSWER 2 |
335 | #define SSH1_AGENTC_RSA_CHALLENGE 3 |
336 | #define SSH1_AGENT_RSA_RESPONSE 4 |
337 | #define SSH1_AGENTC_ADD_RSA_IDENTITY 7 |
338 | #define SSH1_AGENTC_REMOVE_RSA_IDENTITY 8 |
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339 | #define SSH1_AGENTC_REMOVE_ALL_RSA_IDENTITIES 9 /* openssh private? */ |
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340 | |
341 | /* |
342 | * Messages common to SSH1 and OpenSSH's SSH2. |
343 | */ |
344 | #define SSH_AGENT_FAILURE 5 |
345 | #define SSH_AGENT_SUCCESS 6 |
346 | |
347 | /* |
348 | * OpenSSH's SSH2 agent messages. |
349 | */ |
350 | #define SSH2_AGENTC_REQUEST_IDENTITIES 11 |
351 | #define SSH2_AGENT_IDENTITIES_ANSWER 12 |
352 | #define SSH2_AGENTC_SIGN_REQUEST 13 |
353 | #define SSH2_AGENT_SIGN_RESPONSE 14 |
354 | #define SSH2_AGENTC_ADD_IDENTITY 17 |
355 | #define SSH2_AGENTC_REMOVE_IDENTITY 18 |
356 | #define SSH2_AGENTC_REMOVE_ALL_IDENTITIES 19 |