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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 | |
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6 | extern void sshfwd_close(struct ssh_channel *c); |
7 | extern int sshfwd_write(struct ssh_channel *c, char *, int); |
8 | extern void sshfwd_unthrottle(struct ssh_channel *c, int bufsize); |
9 | |
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10 | /* |
11 | * Useful thing. |
12 | */ |
13 | #ifndef lenof |
14 | #define lenof(x) ( (sizeof((x))) / (sizeof(*(x)))) |
15 | #endif |
16 | |
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17 | #define SSH_CIPHER_IDEA 1 |
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18 | #define SSH_CIPHER_DES 2 |
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19 | #define SSH_CIPHER_3DES 3 |
20 | #define SSH_CIPHER_BLOWFISH 6 |
21 | |
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22 | #ifdef MSCRYPTOAPI |
23 | #define APIEXTRA 8 |
24 | #else |
25 | #define APIEXTRA 0 |
26 | #endif |
27 | |
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28 | #ifndef BIGNUM_INTERNAL |
29 | typedef void *Bignum; |
30 | #endif |
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31 | |
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32 | struct RSAKey { |
33 | int bits; |
34 | int bytes; |
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35 | #ifdef MSCRYPTOAPI |
36 | unsigned long exponent; |
37 | unsigned char *modulus; |
38 | #else |
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39 | Bignum modulus; |
40 | Bignum exponent; |
41 | Bignum private_exponent; |
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42 | Bignum p; |
43 | Bignum q; |
44 | Bignum iqmp; |
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45 | #endif |
46 | char *comment; |
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47 | }; |
48 | |
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49 | int makekey(unsigned char *data, struct RSAKey *result, |
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50 | unsigned char **keystr, int order); |
51 | int makeprivate(unsigned char *data, struct RSAKey *result); |
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52 | void rsaencrypt(unsigned char *data, int length, struct RSAKey *key); |
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53 | Bignum rsadecrypt(Bignum input, struct RSAKey *key); |
54 | void rsasign(unsigned char *data, int length, struct RSAKey *key); |
55 | void rsasanitise(struct RSAKey *key); |
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56 | int rsastr_len(struct RSAKey *key); |
57 | void rsastr_fmt(char *str, struct RSAKey *key); |
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58 | void rsa_fingerprint(char *str, int len, struct RSAKey *key); |
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59 | int rsa_verify(struct RSAKey *key); |
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60 | void freersakey(struct RSAKey *key); |
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61 | |
62 | typedef unsigned int word32; |
63 | typedef unsigned int uint32; |
64 | |
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65 | unsigned long crc32(const void *s, size_t len); |
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66 | |
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67 | typedef struct { |
68 | uint32 h[4]; |
69 | } MD5_Core_State; |
70 | |
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71 | struct MD5Context { |
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72 | #ifdef MSCRYPTOAPI |
73 | unsigned long hHash; |
74 | #else |
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75 | MD5_Core_State core; |
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76 | unsigned char block[64]; |
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77 | int blkused; |
78 | uint32 lenhi, lenlo; |
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79 | #endif |
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80 | }; |
81 | |
82 | void MD5Init(struct MD5Context *context); |
83 | void MD5Update(struct MD5Context *context, unsigned char const *buf, |
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84 | unsigned len); |
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85 | void MD5Final(unsigned char digest[16], struct MD5Context *context); |
86 | |
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87 | typedef struct { |
88 | uint32 h[5]; |
89 | unsigned char block[64]; |
90 | int blkused; |
91 | uint32 lenhi, lenlo; |
92 | } SHA_State; |
93 | |
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94 | void SHA_Init(SHA_State * s); |
95 | void SHA_Bytes(SHA_State * s, void *p, int len); |
96 | void SHA_Final(SHA_State * s, unsigned char *output); |
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97 | void SHA_Simple(void *p, int len, unsigned char *output); |
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98 | |
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99 | struct ssh_cipher { |
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100 | void (*sesskey) (unsigned char *key); /* for ssh 1 */ |
101 | void (*encrypt) (unsigned char *blk, int len); |
102 | void (*decrypt) (unsigned char *blk, int len); |
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103 | int blksize; |
104 | }; |
105 | |
106 | struct ssh2_cipher { |
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107 | void (*setcsiv) (unsigned char *key); /* for ssh 2 */ |
108 | void (*setcskey) (unsigned char *key); /* for ssh 2 */ |
109 | void (*setsciv) (unsigned char *key); /* for ssh 2 */ |
110 | void (*setsckey) (unsigned char *key); /* for ssh 2 */ |
111 | void (*encrypt) (unsigned char *blk, int len); |
112 | void (*decrypt) (unsigned char *blk, int len); |
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113 | char *name; |
114 | int blksize; |
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115 | int keylen; |
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116 | }; |
117 | |
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118 | struct ssh2_ciphers { |
119 | int nciphers; |
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120 | const struct ssh2_cipher *const *list; |
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121 | }; |
122 | |
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123 | struct ssh_mac { |
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124 | void (*setcskey) (unsigned char *key); |
125 | void (*setsckey) (unsigned char *key); |
126 | void (*generate) (unsigned char *blk, int len, unsigned long seq); |
127 | int (*verify) (unsigned char *blk, int len, unsigned long seq); |
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128 | char *name; |
129 | int len; |
130 | }; |
131 | |
132 | struct ssh_kex { |
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133 | /* |
134 | * Plugging in another KEX algorithm requires structural chaos, |
135 | * so it's hard to abstract them into nice little structures |
136 | * like this. Hence, for the moment, this is just a |
137 | * placeholder. I claim justification in the fact that OpenSSH |
138 | * does this too :-) |
139 | */ |
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140 | char *name; |
141 | }; |
142 | |
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143 | struct ssh_signkey { |
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144 | void *(*newkey) (char *data, int len); |
145 | void (*freekey) (void *key); |
146 | char *(*fmtkey) (void *key); |
147 | unsigned char *(*public_blob) (void *key, int *len); |
148 | unsigned char *(*private_blob) (void *key, int *len); |
149 | void *(*createkey) (unsigned char *pub_blob, int pub_len, |
150 | unsigned char *priv_blob, int priv_len); |
151 | void *(*openssh_createkey) (unsigned char **blob, int *len); |
152 | int (*openssh_fmtkey) (void *key, unsigned char *blob, int len); |
153 | char *(*fingerprint) (void *key); |
154 | int (*verifysig) (void *key, char *sig, int siglen, |
155 | char *data, int datalen); |
156 | unsigned char *(*sign) (void *key, char *data, int datalen, |
157 | int *siglen); |
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158 | char *name; |
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159 | char *keytype; /* for host key cache */ |
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160 | }; |
161 | |
162 | struct ssh_compress { |
163 | char *name; |
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164 | void (*compress_init) (void); |
165 | int (*compress) (unsigned char *block, int len, |
166 | unsigned char **outblock, int *outlen); |
167 | void (*decompress_init) (void); |
168 | int (*decompress) (unsigned char *block, int len, |
169 | unsigned char **outblock, int *outlen); |
170 | int (*disable_compression) (void); |
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171 | }; |
172 | |
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173 | struct ssh2_userkey { |
174 | const struct ssh_signkey *alg; /* the key algorithm */ |
175 | void *data; /* the key data */ |
176 | char *comment; /* the key comment */ |
177 | }; |
178 | |
179 | extern const struct ssh_cipher ssh_3des; |
180 | extern const struct ssh_cipher ssh_des; |
181 | extern const struct ssh_cipher ssh_blowfish_ssh1; |
182 | extern const struct ssh2_ciphers ssh2_3des; |
183 | extern const struct ssh2_ciphers ssh2_aes; |
184 | extern const struct ssh2_ciphers ssh2_blowfish; |
185 | extern const struct ssh_kex ssh_diffiehellman; |
186 | extern const struct ssh_kex ssh_diffiehellman_gex; |
187 | extern const struct ssh_signkey ssh_dss; |
188 | extern const struct ssh_signkey ssh_rsa; |
189 | extern const struct ssh_mac ssh_md5; |
190 | extern const struct ssh_mac ssh_sha1; |
191 | extern const struct ssh_mac ssh_sha1_buggy; |
192 | |
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193 | /* |
194 | * PuTTY version number formatted as an SSH version string. |
195 | */ |
196 | extern char sshver[]; |
197 | |
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198 | #ifndef MSCRYPTOAPI |
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199 | void SHATransform(word32 * digest, word32 * data); |
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200 | #endif |
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201 | |
202 | int random_byte(void); |
203 | void random_add_noise(void *noise, int length); |
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204 | void random_add_heavynoise(void *noise, int length); |
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205 | |
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206 | void logevent(char *); |
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207 | void *new_sock_channel(Socket s); // allocates and register a new channel for port forwarding |
208 | void ssh_send_port_open(void *channel, char *hostname, int port, char *org); |
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209 | |
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210 | Bignum copybn(Bignum b); |
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211 | Bignum bn_power_2(int n); |
212 | void bn_restore_invariant(Bignum b); |
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213 | Bignum bignum_from_short(unsigned short n); |
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214 | void freebn(Bignum b); |
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215 | Bignum modpow(Bignum base, Bignum exp, Bignum mod); |
216 | Bignum modmul(Bignum a, Bignum b, Bignum mod); |
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217 | void decbn(Bignum n); |
218 | extern Bignum Zero, One; |
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219 | Bignum bignum_from_bytes(unsigned char *data, int nbytes); |
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220 | int ssh1_read_bignum(unsigned char *data, Bignum * result); |
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221 | int bignum_bitcount(Bignum bn); |
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222 | int ssh1_bignum_length(Bignum bn); |
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223 | int ssh2_bignum_length(Bignum bn); |
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224 | int bignum_byte(Bignum bn, int i); |
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225 | int bignum_bit(Bignum bn, int i); |
226 | void bignum_set_bit(Bignum bn, int i, int value); |
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227 | int ssh1_write_bignum(void *data, Bignum bn); |
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228 | Bignum biggcd(Bignum a, Bignum b); |
229 | unsigned short bignum_mod_short(Bignum number, unsigned short modulus); |
230 | Bignum bignum_add_long(Bignum number, unsigned long addend); |
231 | Bignum bigmul(Bignum a, Bignum b); |
232 | Bignum modinv(Bignum number, Bignum modulus); |
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233 | Bignum bignum_bitmask(Bignum number); |
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234 | Bignum bignum_rshift(Bignum number, int shift); |
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235 | int bignum_cmp(Bignum a, Bignum b); |
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236 | char *bignum_decimal(Bignum x); |
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237 | |
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238 | void dh_setup_group1(void); |
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239 | void dh_setup_group(Bignum pval, Bignum gval); |
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240 | void dh_cleanup(void); |
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241 | Bignum dh_create_e(int nbits); |
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242 | Bignum dh_find_K(Bignum f); |
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243 | |
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244 | int loadrsakey(char *filename, struct RSAKey *key, char *passphrase); |
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245 | int rsakey_encrypted(char *filename, char **comment); |
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246 | |
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247 | int saversakey(char *filename, struct RSAKey *key, char *passphrase); |
248 | |
249 | void base64_encode_atom(unsigned char *data, int n, char *out); |
250 | |
251 | /* ssh2_load_userkey can return this as an error */ |
252 | extern struct ssh2_userkey ssh2_wrong_passphrase; |
253 | #define SSH2_WRONG_PASSPHRASE (&ssh2_wrong_passphrase) |
254 | |
255 | int ssh2_userkey_encrypted(char *filename, char **comment); |
256 | struct ssh2_userkey *ssh2_load_userkey(char *filename, char *passphrase); |
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257 | char *ssh2_userkey_loadpub(char *filename, char **algorithm, |
258 | int *pub_blob_len); |
259 | int ssh2_save_userkey(char *filename, struct ssh2_userkey *key, |
260 | char *passphrase); |
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261 | |
262 | int keyfile_version(char *filename); |
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263 | |
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264 | void des3_decrypt_pubkey(unsigned char *key, unsigned char *blk, int len); |
265 | void des3_encrypt_pubkey(unsigned char *key, unsigned char *blk, int len); |
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266 | void aes256_encrypt_pubkey(unsigned char *key, unsigned char *blk, |
267 | int len); |
268 | void aes256_decrypt_pubkey(unsigned char *key, unsigned char *blk, |
269 | int len); |
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270 | |
271 | /* |
272 | * For progress updates in the key generation utility. |
273 | */ |
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274 | typedef void (*progfn_t) (void *param, int phase, int progress); |
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275 | |
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276 | int rsa_generate(struct RSAKey *key, int bits, progfn_t pfn, |
277 | void *pfnparam); |
278 | Bignum primegen(int bits, int modulus, int residue, int phase, |
279 | progfn_t pfn, void *pfnparam); |
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280 | |
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281 | |
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282 | /* |
283 | * zlib compression. |
284 | */ |
285 | void zlib_compress_init(void); |
286 | void zlib_decompress_init(void); |
287 | int zlib_compress_block(unsigned char *block, int len, |
288 | unsigned char **outblock, int *outlen); |
289 | int zlib_decompress_block(unsigned char *block, int len, |
290 | unsigned char **outblock, int *outlen); |
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291 | |
292 | /* |
293 | * SSH1 agent messages. |
294 | */ |
295 | #define SSH1_AGENTC_REQUEST_RSA_IDENTITIES 1 |
296 | #define SSH1_AGENT_RSA_IDENTITIES_ANSWER 2 |
297 | #define SSH1_AGENTC_RSA_CHALLENGE 3 |
298 | #define SSH1_AGENT_RSA_RESPONSE 4 |
299 | #define SSH1_AGENTC_ADD_RSA_IDENTITY 7 |
300 | #define SSH1_AGENTC_REMOVE_RSA_IDENTITY 8 |
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301 | #define SSH1_AGENTC_REMOVE_ALL_RSA_IDENTITIES 9 /* openssh private? */ |
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302 | |
303 | /* |
304 | * Messages common to SSH1 and OpenSSH's SSH2. |
305 | */ |
306 | #define SSH_AGENT_FAILURE 5 |
307 | #define SSH_AGENT_SUCCESS 6 |
308 | |
309 | /* |
310 | * OpenSSH's SSH2 agent messages. |
311 | */ |
312 | #define SSH2_AGENTC_REQUEST_IDENTITIES 11 |
313 | #define SSH2_AGENT_IDENTITIES_ANSWER 12 |
314 | #define SSH2_AGENTC_SIGN_REQUEST 13 |
315 | #define SSH2_AGENT_SIGN_RESPONSE 14 |
316 | #define SSH2_AGENTC_ADD_IDENTITY 17 |
317 | #define SSH2_AGENTC_REMOVE_IDENTITY 18 |
318 | #define SSH2_AGENTC_REMOVE_ALL_IDENTITIES 19 |