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1 | #include <stdio.h> |
37508af4 |
2 | #include <string.h> |
3 | |
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4 | #include "puttymem.h" |
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5 | #include "network.h" |
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6 | #include "int64.h" |
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7 | |
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8 | struct ssh_channel; |
9 | |
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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); |
13 | |
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14 | /* |
15 | * Useful thing. |
16 | */ |
17 | #ifndef lenof |
18 | #define lenof(x) ( (sizeof((x))) / (sizeof(*(x)))) |
19 | #endif |
20 | |
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21 | #define SSH_CIPHER_IDEA 1 |
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22 | #define SSH_CIPHER_DES 2 |
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23 | #define SSH_CIPHER_3DES 3 |
24 | #define SSH_CIPHER_BLOWFISH 6 |
25 | |
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26 | #ifdef MSCRYPTOAPI |
27 | #define APIEXTRA 8 |
28 | #else |
29 | #define APIEXTRA 0 |
30 | #endif |
31 | |
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32 | #ifndef BIGNUM_INTERNAL |
33 | typedef void *Bignum; |
34 | #endif |
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35 | |
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36 | struct RSAKey { |
37 | int bits; |
38 | int bytes; |
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39 | #ifdef MSCRYPTOAPI |
40 | unsigned long exponent; |
41 | unsigned char *modulus; |
42 | #else |
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43 | Bignum modulus; |
44 | Bignum exponent; |
45 | Bignum private_exponent; |
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46 | Bignum p; |
47 | Bignum q; |
48 | Bignum iqmp; |
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49 | #endif |
50 | char *comment; |
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51 | }; |
52 | |
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53 | struct dss_key { |
54 | Bignum p, q, g, y, x; |
55 | }; |
56 | |
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57 | int makekey(unsigned char *data, struct RSAKey *result, |
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58 | unsigned char **keystr, int order); |
59 | int makeprivate(unsigned char *data, struct RSAKey *result); |
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60 | void rsaencrypt(unsigned char *data, int length, struct RSAKey *key); |
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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); |
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64 | int rsastr_len(struct RSAKey *key); |
65 | void rsastr_fmt(char *str, struct RSAKey *key); |
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66 | void rsa_fingerprint(char *str, int len, struct RSAKey *key); |
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67 | int rsa_verify(struct RSAKey *key); |
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68 | unsigned char *rsa_public_blob(struct RSAKey *key, int *len); |
69 | int rsa_public_blob_len(void *data); |
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70 | void freersakey(struct RSAKey *key); |
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71 | |
72 | typedef unsigned int word32; |
73 | typedef unsigned int uint32; |
74 | |
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75 | unsigned long crc32(const void *s, size_t len); |
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76 | unsigned long crc32_update(unsigned long crc_input, const void *s, size_t len); |
77 | |
78 | /* SSH CRC compensation attack detector */ |
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79 | void *crcda_make_context(void); |
80 | void crcda_free_context(void *handle); |
81 | int detect_attack(void *handle, unsigned char *buf, uint32 len, |
82 | unsigned char *IV); |
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83 | |
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84 | typedef struct { |
85 | uint32 h[4]; |
86 | } MD5_Core_State; |
87 | |
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88 | struct MD5Context { |
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89 | #ifdef MSCRYPTOAPI |
90 | unsigned long hHash; |
91 | #else |
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92 | MD5_Core_State core; |
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93 | unsigned char block[64]; |
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94 | int blkused; |
95 | uint32 lenhi, lenlo; |
8f203108 |
96 | #endif |
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97 | }; |
98 | |
99 | void MD5Init(struct MD5Context *context); |
100 | void MD5Update(struct MD5Context *context, unsigned char const *buf, |
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101 | unsigned len); |
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102 | void MD5Final(unsigned char digest[16], struct MD5Context *context); |
103 | |
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104 | typedef struct { |
105 | uint32 h[5]; |
106 | unsigned char block[64]; |
107 | int blkused; |
108 | uint32 lenhi, lenlo; |
109 | } SHA_State; |
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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); |
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113 | void SHA_Simple(void *p, int len, unsigned char *output); |
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114 | |
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115 | void hmac_sha1_simple(void *key, int keylen, void *data, int datalen, |
116 | unsigned char *output); |
117 | |
118 | typedef struct { |
119 | uint64 h[8]; |
120 | unsigned char block[128]; |
121 | int blkused; |
122 | uint32 len[4]; |
123 | } SHA512_State; |
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); |
128 | |
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129 | struct ssh_cipher { |
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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); |
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135 | int blksize; |
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136 | char *text_name; |
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137 | }; |
138 | |
139 | struct ssh2_cipher { |
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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); |
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146 | char *name; |
147 | int blksize; |
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148 | int keylen; |
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149 | char *text_name; |
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150 | }; |
151 | |
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152 | struct ssh2_ciphers { |
153 | int nciphers; |
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154 | const struct ssh2_cipher *const *list; |
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155 | }; |
156 | |
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157 | struct ssh_mac { |
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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); |
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163 | char *name; |
164 | int len; |
165 | }; |
166 | |
167 | struct ssh_kex { |
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168 | /* |
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 |
173 | * does this too :-) |
174 | */ |
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175 | char *name; |
176 | }; |
177 | |
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178 | struct ssh_signkey { |
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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, |
192 | int *siglen); |
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193 | char *name; |
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194 | char *keytype; /* for host key cache */ |
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195 | }; |
196 | |
197 | struct ssh_compress { |
198 | char *name; |
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199 | void *(*compress_init) (void); |
200 | void (*compress_cleanup) (void *); |
201 | int (*compress) (void *, unsigned char *block, int len, |
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202 | unsigned char **outblock, int *outlen); |
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203 | void *(*decompress_init) (void); |
204 | void (*decompress_cleanup) (void *); |
205 | int (*decompress) (void *, unsigned char *block, int len, |
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206 | unsigned char **outblock, int *outlen); |
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207 | int (*disable_compression) (void *); |
208 | char *text_name; |
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209 | }; |
210 | |
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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 */ |
215 | }; |
216 | |
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; |
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221 | extern const struct ssh2_ciphers ssh2_des; |
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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; |
231 | |
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232 | /* |
233 | * PuTTY version number formatted as an SSH version string. |
234 | */ |
235 | extern char sshver[]; |
236 | |
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237 | /* |
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. |
241 | */ |
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242 | extern int ssh_fallback_cmd(void *handle); |
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243 | |
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244 | #ifndef MSCRYPTOAPI |
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245 | void SHATransform(word32 * digest, word32 * data); |
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246 | #endif |
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247 | |
248 | int random_byte(void); |
249 | void random_add_noise(void *noise, int length); |
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250 | void random_add_heavynoise(void *noise, int length); |
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251 | |
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252 | void logevent(void *, char *); |
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253 | |
254 | /* Allocate and register a new channel for port forwarding */ |
255 | void *new_sock_channel(void *handle, Socket s); |
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256 | void ssh_send_port_open(void *channel, char *hostname, int port, char *org); |
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257 | |
322d09a8 |
258 | /* Exports from portfwd.c */ |
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259 | extern char *pfd_newconnect(Socket * s, char *hostname, int port, void *c, |
260 | const Config *cfg); |
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261 | extern char *pfd_addforward(char *desthost, int destport, char *srcaddr, |
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262 | int port, void *backhandle, const Config *cfg); |
322d09a8 |
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); |
268 | |
269 | /* Exports from x11fwd.c */ |
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270 | extern char *x11_init(Socket *, char *, void *, void *, const char *, int, |
271 | const Config *); |
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272 | extern void x11_close(Socket); |
273 | extern int x11_send(Socket, char *, int); |
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274 | extern void *x11_invent_auth(char *, int, char *, int, int); |
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275 | extern void x11_unthrottle(Socket s); |
276 | extern void x11_override_throttle(Socket s, int enable); |
277 | extern int x11_get_screen_number(char *display); |
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278 | void x11_get_real_auth(void *authv, char *display); |
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279 | |
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280 | /* Platfdorm-dependent X11 function */ |
281 | extern void platform_get_x11_auth(char *display, int *proto, |
282 | unsigned char *data, int *datalen); |
283 | |
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284 | Bignum copybn(Bignum b); |
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285 | Bignum bn_power_2(int n); |
286 | void bn_restore_invariant(Bignum b); |
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287 | Bignum bignum_from_long(unsigned long n); |
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288 | void freebn(Bignum b); |
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289 | Bignum modpow(Bignum base, Bignum exp, Bignum mod); |
290 | Bignum modmul(Bignum a, Bignum b, Bignum mod); |
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291 | void decbn(Bignum n); |
292 | extern Bignum Zero, One; |
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293 | Bignum bignum_from_bytes(const unsigned char *data, int nbytes); |
294 | int ssh1_read_bignum(const unsigned char *data, Bignum * result); |
ddecd643 |
295 | int bignum_bitcount(Bignum bn); |
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296 | int ssh1_bignum_length(Bignum bn); |
260f3dec |
297 | int ssh2_bignum_length(Bignum bn); |
5c58ad2d |
298 | int bignum_byte(Bignum bn, int i); |
9400cf6f |
299 | int bignum_bit(Bignum bn, int i); |
300 | void bignum_set_bit(Bignum bn, int i, int value); |
5c58ad2d |
301 | int ssh1_write_bignum(void *data, Bignum bn); |
9400cf6f |
302 | Bignum biggcd(Bignum a, Bignum b); |
303 | unsigned short bignum_mod_short(Bignum number, unsigned short modulus); |
304 | Bignum bignum_add_long(Bignum number, unsigned long addend); |
305 | Bignum bigmul(Bignum a, Bignum b); |
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306 | Bignum bigmuladd(Bignum a, Bignum b, Bignum addend); |
307 | Bignum bigdiv(Bignum a, Bignum b); |
308 | Bignum bigmod(Bignum a, Bignum b); |
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309 | Bignum modinv(Bignum number, Bignum modulus); |
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310 | Bignum bignum_bitmask(Bignum number); |
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311 | Bignum bignum_rshift(Bignum number, int shift); |
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312 | int bignum_cmp(Bignum a, Bignum b); |
6e522441 |
313 | char *bignum_decimal(Bignum x); |
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314 | |
27cd7fc2 |
315 | void *dh_setup_group1(void); |
316 | void *dh_setup_group(Bignum pval, Bignum gval); |
317 | void dh_cleanup(void *); |
318 | Bignum dh_create_e(void *, int nbits); |
319 | Bignum dh_find_K(void *, Bignum f); |
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320 | |
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321 | int loadrsakey(char *filename, struct RSAKey *key, char *passphrase); |
a52f067e |
322 | int rsakey_encrypted(char *filename, char **comment); |
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323 | int rsakey_pubblob(char *filename, void **blob, int *bloblen); |
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324 | |
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325 | int saversakey(char *filename, struct RSAKey *key, char *passphrase); |
326 | |
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327 | extern int base64_decode_atom(char *atom, unsigned char *out); |
328 | extern int base64_lines(int datalen); |
329 | extern void base64_encode_atom(unsigned char *data, int n, char *out); |
330 | extern void base64_encode(FILE *fp, unsigned char *data, int datalen, int cpl); |
65a22376 |
331 | |
332 | /* ssh2_load_userkey can return this as an error */ |
333 | extern struct ssh2_userkey ssh2_wrong_passphrase; |
334 | #define SSH2_WRONG_PASSPHRASE (&ssh2_wrong_passphrase) |
335 | |
336 | int ssh2_userkey_encrypted(char *filename, char **comment); |
337 | struct ssh2_userkey *ssh2_load_userkey(char *filename, char *passphrase); |
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338 | char *ssh2_userkey_loadpub(char *filename, char **algorithm, |
339 | int *pub_blob_len); |
340 | int ssh2_save_userkey(char *filename, struct ssh2_userkey *key, |
341 | char *passphrase); |
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342 | |
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343 | enum { |
344 | SSH_KEYTYPE_UNOPENABLE, |
345 | SSH_KEYTYPE_UNKNOWN, |
346 | SSH_KEYTYPE_SSH1, SSH_KEYTYPE_SSH2, |
347 | SSH_KEYTYPE_OPENSSH, SSH_KEYTYPE_SSHCOM |
348 | }; |
349 | int key_type(char *filename); |
350 | char *key_type_to_str(int type); |
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351 | |
9dda6459 |
352 | int import_possible(int type); |
353 | int import_target_type(int type); |
354 | int import_encrypted(char *filename, int type, char **comment); |
355 | int import_ssh1(char *filename, int type, struct RSAKey *key,char *passphrase); |
356 | struct ssh2_userkey *import_ssh2(char *filename, int type, char *passphrase); |
4801c01c |
357 | int export_ssh1(char *filename, int type, struct RSAKey *key,char *passphrase); |
358 | int export_ssh2(char *filename, int type, |
359 | struct ssh2_userkey *key, char *passphrase); |
9dda6459 |
360 | |
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361 | void des3_decrypt_pubkey(unsigned char *key, unsigned char *blk, int len); |
362 | void des3_encrypt_pubkey(unsigned char *key, unsigned char *blk, int len); |
9dda6459 |
363 | void des3_decrypt_pubkey_ossh(unsigned char *key, unsigned char *iv, |
364 | unsigned char *blk, int len); |
365 | void des3_encrypt_pubkey_ossh(unsigned char *key, unsigned char *iv, |
366 | unsigned char *blk, int len); |
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367 | void aes256_encrypt_pubkey(unsigned char *key, unsigned char *blk, |
368 | int len); |
369 | void aes256_decrypt_pubkey(unsigned char *key, unsigned char *blk, |
370 | int len); |
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371 | |
2f92b717 |
372 | void des_encrypt_xdmauth(unsigned char *key, unsigned char *blk, int len); |
b3ebaa28 |
373 | void des_decrypt_xdmauth(unsigned char *key, unsigned char *blk, int len); |
2f92b717 |
374 | |
9400cf6f |
375 | /* |
376 | * For progress updates in the key generation utility. |
377 | */ |
7c7f6893 |
378 | #define PROGFN_INITIALISE 1 |
379 | #define PROGFN_LIN_PHASE 2 |
380 | #define PROGFN_EXP_PHASE 3 |
381 | #define PROGFN_PHASE_EXTENT 4 |
382 | #define PROGFN_READY 5 |
383 | #define PROGFN_PROGRESS 6 |
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384 | typedef void (*progfn_t) (void *param, int action, int phase, int progress); |
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385 | |
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386 | int rsa_generate(struct RSAKey *key, int bits, progfn_t pfn, |
387 | void *pfnparam); |
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388 | int dsa_generate(struct dss_key *key, int bits, progfn_t pfn, |
389 | void *pfnparam); |
390 | Bignum primegen(int bits, int modulus, int residue, Bignum factor, |
391 | int phase, progfn_t pfn, void *pfnparam); |
4ba9b64b |
392 | |
d74d141c |
393 | |
4ba9b64b |
394 | /* |
395 | * zlib compression. |
396 | */ |
5366aed8 |
397 | void *zlib_compress_init(void); |
398 | void zlib_compress_cleanup(void *); |
399 | void *zlib_decompress_init(void); |
400 | void zlib_decompress_cleanup(void *); |
401 | int zlib_compress_block(void *, unsigned char *block, int len, |
4ba9b64b |
402 | unsigned char **outblock, int *outlen); |
5366aed8 |
403 | int zlib_decompress_block(void *, unsigned char *block, int len, |
4ba9b64b |
404 | unsigned char **outblock, int *outlen); |
1983e559 |
405 | |
406 | /* |
407 | * SSH1 agent messages. |
408 | */ |
409 | #define SSH1_AGENTC_REQUEST_RSA_IDENTITIES 1 |
410 | #define SSH1_AGENT_RSA_IDENTITIES_ANSWER 2 |
411 | #define SSH1_AGENTC_RSA_CHALLENGE 3 |
412 | #define SSH1_AGENT_RSA_RESPONSE 4 |
413 | #define SSH1_AGENTC_ADD_RSA_IDENTITY 7 |
414 | #define SSH1_AGENTC_REMOVE_RSA_IDENTITY 8 |
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415 | #define SSH1_AGENTC_REMOVE_ALL_RSA_IDENTITIES 9 /* openssh private? */ |
1983e559 |
416 | |
417 | /* |
418 | * Messages common to SSH1 and OpenSSH's SSH2. |
419 | */ |
420 | #define SSH_AGENT_FAILURE 5 |
421 | #define SSH_AGENT_SUCCESS 6 |
422 | |
423 | /* |
424 | * OpenSSH's SSH2 agent messages. |
425 | */ |
426 | #define SSH2_AGENTC_REQUEST_IDENTITIES 11 |
427 | #define SSH2_AGENT_IDENTITIES_ANSWER 12 |
428 | #define SSH2_AGENTC_SIGN_REQUEST 13 |
429 | #define SSH2_AGENT_SIGN_RESPONSE 14 |
430 | #define SSH2_AGENTC_ADD_IDENTITY 17 |
431 | #define SSH2_AGENTC_REMOVE_IDENTITY 18 |
432 | #define SSH2_AGENTC_REMOVE_ALL_IDENTITIES 19 |
7bedb13c |
433 | |
434 | /* |
435 | * Need this to warn about support for the original SSH2 keyfile |
436 | * format. |
437 | */ |
438 | void old_keyfile_warning(void); |