4 #include "puttymem.h"
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11 extern void sshfwd_close(struct ssh_channel *c);
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12 extern int sshfwd_write(struct ssh_channel *c, char *, int);
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13 extern void sshfwd_unthrottle(struct ssh_channel *c, int bufsize);
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19 #define lenof(x) ( (sizeof((x))) / (sizeof(*(x))))
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22 #define SSH_CIPHER_IDEA 1
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23 #define SSH_CIPHER_DES 2
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24 #define SSH_CIPHER_3DES 3
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25 #define SSH_CIPHER_BLOWFISH 6
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33 #ifndef BIGNUM_INTERNAL
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34 typedef void *Bignum;
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41 unsigned long exponent;
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42 unsigned char *modulus;
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46 Bignum private_exponent;
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55 Bignum p, q, g, y, x;
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58 int makekey(unsigned char *data, int len, struct RSAKey *result,
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59 unsigned char **keystr, int order);
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60 int makeprivate(unsigned char *data, int len, struct RSAKey *result);
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61 int rsaencrypt(unsigned char *data, int length, struct RSAKey *key);
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62 Bignum rsadecrypt(Bignum input, struct RSAKey *key);
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63 void rsasign(unsigned char *data, int length, struct RSAKey *key);
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64 void rsasanitise(struct RSAKey *key);
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65 int rsastr_len(struct RSAKey *key);
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66 void rsastr_fmt(char *str, struct RSAKey *key);
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67 void rsa_fingerprint(char *str, int len, struct RSAKey *key);
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68 int rsa_verify(struct RSAKey *key);
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69 unsigned char *rsa_public_blob(struct RSAKey *key, int *len);
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70 int rsa_public_blob_len(void *data, int maxlen);
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71 void freersakey(struct RSAKey *key);
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73 typedef unsigned int word32;
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74 typedef unsigned int uint32;
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76 unsigned long crc32_compute(const void *s, size_t len);
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77 unsigned long crc32_update(unsigned long crc_input, const void *s, size_t len);
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79 /* SSH CRC compensation attack detector */
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80 void *crcda_make_context(void);
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81 void crcda_free_context(void *handle);
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82 int detect_attack(void *handle, unsigned char *buf, uint32 len,
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91 unsigned long hHash;
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93 MD5_Core_State core;
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94 unsigned char block[64];
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96 uint32 lenhi, lenlo;
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100 void MD5Init(struct MD5Context *context);
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101 void MD5Update(struct MD5Context *context, unsigned char const *buf,
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103 void MD5Final(unsigned char digest[16], struct MD5Context *context);
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104 void MD5Simple(void const *p, unsigned len, unsigned char output[16]);
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106 void *hmacmd5_make_context(void);
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107 void hmacmd5_free_context(void *handle);
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108 void hmacmd5_key(void *handle, void const *key, int len);
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109 void hmacmd5_do_hmac(void *handle, unsigned char const *blk, int len,
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110 unsigned char *hmac);
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114 unsigned char block[64];
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116 uint32 lenhi, lenlo;
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118 void SHA_Init(SHA_State * s);
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119 void SHA_Bytes(SHA_State * s, void *p, int len);
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120 void SHA_Final(SHA_State * s, unsigned char *output);
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121 void SHA_Simple(void *p, int len, unsigned char *output);
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123 void hmac_sha1_simple(void *key, int keylen, void *data, int datalen,
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124 unsigned char *output);
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127 unsigned char block[64];
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129 uint32 lenhi, lenlo;
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131 void SHA256_Init(SHA256_State * s);
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132 void SHA256_Bytes(SHA256_State * s, const void *p, int len);
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133 void SHA256_Final(SHA256_State * s, unsigned char *output);
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134 void SHA256_Simple(const void *p, int len, unsigned char *output);
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138 unsigned char block[128];
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142 void SHA512_Init(SHA512_State * s);
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143 void SHA512_Bytes(SHA512_State * s, const void *p, int len);
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144 void SHA512_Final(SHA512_State * s, unsigned char *output);
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145 void SHA512_Simple(const void *p, int len, unsigned char *output);
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147 struct ssh_cipher {
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148 void *(*make_context)(void);
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149 void (*free_context)(void *);
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150 void (*sesskey) (void *, unsigned char *key); /* for SSH-1 */
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151 void (*encrypt) (void *, unsigned char *blk, int len);
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152 void (*decrypt) (void *, unsigned char *blk, int len);
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157 struct ssh2_cipher {
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158 void *(*make_context)(void);
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159 void (*free_context)(void *);
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160 void (*setiv) (void *, unsigned char *key); /* for SSH-2 */
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161 void (*setkey) (void *, unsigned char *key);/* for SSH-2 */
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162 void (*encrypt) (void *, unsigned char *blk, int len);
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163 void (*decrypt) (void *, unsigned char *blk, int len);
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167 unsigned int flags;
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168 #define SSH_CIPHER_IS_CBC 1
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172 struct ssh2_ciphers {
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174 const struct ssh2_cipher *const *list;
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178 void *(*make_context)(void);
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179 void (*free_context)(void *);
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180 void (*setkey) (void *, unsigned char *key);
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181 void (*generate) (void *, unsigned char *blk, int len, unsigned long seq);
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182 int (*verify) (void *, unsigned char *blk, int len, unsigned long seq);
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189 void *(*init)(void); /* also allocates context */
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190 void (*bytes)(void *, void *, int);
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191 void (*final)(void *, unsigned char *); /* also frees context */
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192 int hlen; /* output length in bytes */
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198 * Plugging in another KEX algorithm requires structural chaos,
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199 * so it's hard to abstract them into nice little structures
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200 * like this. Fortunately, all our KEXes are basically
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201 * Diffie-Hellman at the moment, so in this structure I simply
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202 * parametrise the DH exchange a bit.
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204 char *name, *groupname;
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205 const unsigned char *pdata, *gdata;/* NULL means use group exchange */
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207 const struct ssh_hash *hash;
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212 const struct ssh_kex *const *list;
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215 struct ssh_signkey {
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216 void *(*newkey) (char *data, int len);
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217 void (*freekey) (void *key);
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218 char *(*fmtkey) (void *key);
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219 unsigned char *(*public_blob) (void *key, int *len);
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220 unsigned char *(*private_blob) (void *key, int *len);
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221 void *(*createkey) (unsigned char *pub_blob, int pub_len,
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222 unsigned char *priv_blob, int priv_len);
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223 void *(*openssh_createkey) (unsigned char **blob, int *len);
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224 int (*openssh_fmtkey) (void *key, unsigned char *blob, int len);
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225 int (*pubkey_bits) (void *blob, int len);
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226 char *(*fingerprint) (void *key);
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227 int (*verifysig) (void *key, char *sig, int siglen,
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228 char *data, int datalen);
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229 unsigned char *(*sign) (void *key, char *data, int datalen,
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232 char *keytype; /* for host key cache */
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235 struct ssh_compress {
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237 void *(*compress_init) (void);
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238 void (*compress_cleanup) (void *);
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239 int (*compress) (void *, unsigned char *block, int len,
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240 unsigned char **outblock, int *outlen);
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241 void *(*decompress_init) (void);
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242 void (*decompress_cleanup) (void *);
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243 int (*decompress) (void *, unsigned char *block, int len,
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244 unsigned char **outblock, int *outlen);
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245 int (*disable_compression) (void *);
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249 struct ssh2_userkey {
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250 const struct ssh_signkey *alg; /* the key algorithm */
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251 void *data; /* the key data */
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252 char *comment; /* the key comment */
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255 /* The maximum length of any hash algorithm used in kex. (bytes) */
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256 #define SSH2_KEX_MAX_HASH_LEN (32) /* SHA-256 */
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258 extern const struct ssh_cipher ssh_3des;
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259 extern const struct ssh_cipher ssh_des;
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260 extern const struct ssh_cipher ssh_blowfish_ssh1;
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261 extern const struct ssh2_ciphers ssh2_3des;
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262 extern const struct ssh2_ciphers ssh2_des;
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263 extern const struct ssh2_ciphers ssh2_aes;
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264 extern const struct ssh2_ciphers ssh2_blowfish;
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265 extern const struct ssh2_ciphers ssh2_arcfour;
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266 extern const struct ssh_hash ssh_sha1;
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267 extern const struct ssh_hash ssh_sha256;
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268 extern const struct ssh_kexes ssh_diffiehellman_group1;
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269 extern const struct ssh_kexes ssh_diffiehellman_group14;
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270 extern const struct ssh_kexes ssh_diffiehellman_gex;
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271 extern const struct ssh_signkey ssh_dss;
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272 extern const struct ssh_signkey ssh_rsa;
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273 extern const struct ssh_mac ssh_hmac_md5;
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274 extern const struct ssh_mac ssh_hmac_sha1;
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275 extern const struct ssh_mac ssh_hmac_sha1_buggy;
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276 extern const struct ssh_mac ssh_hmac_sha1_96;
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277 extern const struct ssh_mac ssh_hmac_sha1_96_buggy;
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281 * PuTTY version number formatted as an SSH version string.
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283 extern char sshver[];
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286 * Gross hack: pscp will try to start SFTP but fall back to scp1 if
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287 * that fails. This variable is the means by which scp.c can reach
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288 * into the SSH code and find out which one it got.
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290 extern int ssh_fallback_cmd(void *handle);
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292 #ifndef MSCRYPTOAPI
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293 void SHATransform(word32 * digest, word32 * data);
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296 int random_byte(void);
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297 void random_add_noise(void *noise, int length);
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298 void random_add_heavynoise(void *noise, int length);
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300 void logevent(void *, const char *);
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302 /* Allocate and register a new channel for port forwarding */
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303 void *new_sock_channel(void *handle, Socket s);
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304 void ssh_send_port_open(void *channel, char *hostname, int port, char *org);
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306 /* Exports from portfwd.c */
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307 extern const char *pfd_newconnect(Socket * s, char *hostname, int port,
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308 void *c, const Config *cfg,
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309 int addressfamily);
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310 /* desthost == NULL indicates dynamic (SOCKS) port forwarding */
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311 extern const char *pfd_addforward(char *desthost, int destport, char *srcaddr,
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312 int port, void *backhandle,
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313 const Config *cfg, void **sockdata,
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314 int address_family);
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315 extern void pfd_close(Socket s);
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316 extern void pfd_terminate(void *sockdata);
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317 extern int pfd_send(Socket s, char *data, int len);
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318 extern void pfd_confirm(Socket s);
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319 extern void pfd_unthrottle(Socket s);
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320 extern void pfd_override_throttle(Socket s, int enable);
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322 /* Exports from x11fwd.c */
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323 extern const char *x11_init(Socket *, char *, void *, void *, const char *,
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324 int, const Config *);
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325 extern void x11_close(Socket);
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326 extern int x11_send(Socket, char *, int);
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327 extern void *x11_invent_auth(char *, int, char *, int, int);
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328 extern void x11_free_auth(void *);
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329 extern void x11_unthrottle(Socket s);
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330 extern void x11_override_throttle(Socket s, int enable);
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331 extern int x11_get_screen_number(char *display);
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332 void x11_get_real_auth(void *authv, char *display);
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333 char *x11_display(const char *display);
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335 /* Platform-dependent X11 functions */
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336 extern void platform_get_x11_auth(char *display, int *proto,
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337 unsigned char *data, int *datalen);
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338 extern const char platform_x11_best_transport[];
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339 /* best X11 hostname for this platform if none specified */
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340 SockAddr platform_get_x11_unix_address(int displaynum, char **canonicalname);
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341 /* make up a SockAddr naming the address for displaynum */
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342 char *platform_get_x_display(void);
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343 /* allocated local X display string, if any */
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345 Bignum copybn(Bignum b);
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346 Bignum bn_power_2(int n);
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347 void bn_restore_invariant(Bignum b);
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348 Bignum bignum_from_long(unsigned long n);
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349 void freebn(Bignum b);
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350 Bignum modpow(Bignum base, Bignum exp, Bignum mod);
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351 Bignum modmul(Bignum a, Bignum b, Bignum mod);
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352 void decbn(Bignum n);
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353 extern Bignum Zero, One;
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354 Bignum bignum_from_bytes(const unsigned char *data, int nbytes);
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355 int ssh1_read_bignum(const unsigned char *data, int len, Bignum * result);
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356 int bignum_bitcount(Bignum bn);
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357 int ssh1_bignum_length(Bignum bn);
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358 int ssh2_bignum_length(Bignum bn);
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359 int bignum_byte(Bignum bn, int i);
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360 int bignum_bit(Bignum bn, int i);
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361 void bignum_set_bit(Bignum bn, int i, int value);
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362 int ssh1_write_bignum(void *data, Bignum bn);
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363 Bignum biggcd(Bignum a, Bignum b);
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364 unsigned short bignum_mod_short(Bignum number, unsigned short modulus);
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365 Bignum bignum_add_long(Bignum number, unsigned long addend);
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366 Bignum bigmul(Bignum a, Bignum b);
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367 Bignum bigmuladd(Bignum a, Bignum b, Bignum addend);
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368 Bignum bigdiv(Bignum a, Bignum b);
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369 Bignum bigmod(Bignum a, Bignum b);
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370 Bignum modinv(Bignum number, Bignum modulus);
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371 Bignum bignum_bitmask(Bignum number);
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372 Bignum bignum_rshift(Bignum number, int shift);
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373 int bignum_cmp(Bignum a, Bignum b);
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374 char *bignum_decimal(Bignum x);
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377 void diagbn(char *prefix, Bignum md);
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380 void *dh_setup_group(const struct ssh_kex *kex);
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381 void *dh_setup_gex(Bignum pval, Bignum gval);
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382 void dh_cleanup(void *);
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383 Bignum dh_create_e(void *, int nbits);
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384 Bignum dh_find_K(void *, Bignum f);
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386 int loadrsakey(const Filename *filename, struct RSAKey *key,
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387 char *passphrase, const char **errorstr);
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388 int rsakey_encrypted(const Filename *filename, char **comment);
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389 int rsakey_pubblob(const Filename *filename, void **blob, int *bloblen,
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390 char **commentptr, const char **errorstr);
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392 int saversakey(const Filename *filename, struct RSAKey *key, char *passphrase);
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394 extern int base64_decode_atom(char *atom, unsigned char *out);
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395 extern int base64_lines(int datalen);
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396 extern void base64_encode_atom(unsigned char *data, int n, char *out);
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397 extern void base64_encode(FILE *fp, unsigned char *data, int datalen, int cpl);
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399 /* ssh2_load_userkey can return this as an error */
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400 extern struct ssh2_userkey ssh2_wrong_passphrase;
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401 #define SSH2_WRONG_PASSPHRASE (&ssh2_wrong_passphrase)
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403 int ssh2_userkey_encrypted(const Filename *filename, char **comment);
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404 struct ssh2_userkey *ssh2_load_userkey(const Filename *filename,
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405 char *passphrase, const char **errorstr);
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406 unsigned char *ssh2_userkey_loadpub(const Filename *filename, char **algorithm,
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407 int *pub_blob_len, char **commentptr,
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408 const char **errorstr);
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409 int ssh2_save_userkey(const Filename *filename, struct ssh2_userkey *key,
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411 const struct ssh_signkey *find_pubkey_alg(const char *name);
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414 SSH_KEYTYPE_UNOPENABLE,
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415 SSH_KEYTYPE_UNKNOWN,
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416 SSH_KEYTYPE_SSH1, SSH_KEYTYPE_SSH2,
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417 SSH_KEYTYPE_OPENSSH, SSH_KEYTYPE_SSHCOM
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419 int key_type(const Filename *filename);
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420 char *key_type_to_str(int type);
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422 int import_possible(int type);
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423 int import_target_type(int type);
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424 int import_encrypted(const Filename *filename, int type, char **comment);
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425 int import_ssh1(const Filename *filename, int type,
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426 struct RSAKey *key, char *passphrase, const char **errmsg_p);
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427 struct ssh2_userkey *import_ssh2(const Filename *filename, int type,
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428 char *passphrase, const char **errmsg_p);
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429 int export_ssh1(const Filename *filename, int type,
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430 struct RSAKey *key, char *passphrase);
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431 int export_ssh2(const Filename *filename, int type,
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432 struct ssh2_userkey *key, char *passphrase);
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434 void des3_decrypt_pubkey(unsigned char *key, unsigned char *blk, int len);
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435 void des3_encrypt_pubkey(unsigned char *key, unsigned char *blk, int len);
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436 void des3_decrypt_pubkey_ossh(unsigned char *key, unsigned char *iv,
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437 unsigned char *blk, int len);
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438 void des3_encrypt_pubkey_ossh(unsigned char *key, unsigned char *iv,
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439 unsigned char *blk, int len);
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440 void aes256_encrypt_pubkey(unsigned char *key, unsigned char *blk,
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442 void aes256_decrypt_pubkey(unsigned char *key, unsigned char *blk,
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445 void des_encrypt_xdmauth(unsigned char *key, unsigned char *blk, int len);
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446 void des_decrypt_xdmauth(unsigned char *key, unsigned char *blk, int len);
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449 * For progress updates in the key generation utility.
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451 #define PROGFN_INITIALISE 1
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452 #define PROGFN_LIN_PHASE 2
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453 #define PROGFN_EXP_PHASE 3
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454 #define PROGFN_PHASE_EXTENT 4
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455 #define PROGFN_READY 5
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456 #define PROGFN_PROGRESS 6
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457 typedef void (*progfn_t) (void *param, int action, int phase, int progress);
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459 int rsa_generate(struct RSAKey *key, int bits, progfn_t pfn,
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461 int dsa_generate(struct dss_key *key, int bits, progfn_t pfn,
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463 Bignum primegen(int bits, int modulus, int residue, Bignum factor,
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464 int phase, progfn_t pfn, void *pfnparam);
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468 * zlib compression.
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470 void *zlib_compress_init(void);
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471 void zlib_compress_cleanup(void *);
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472 void *zlib_decompress_init(void);
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473 void zlib_decompress_cleanup(void *);
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474 int zlib_compress_block(void *, unsigned char *block, int len,
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475 unsigned char **outblock, int *outlen);
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476 int zlib_decompress_block(void *, unsigned char *block, int len,
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477 unsigned char **outblock, int *outlen);
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480 * SSH-1 agent messages.
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482 #define SSH1_AGENTC_REQUEST_RSA_IDENTITIES 1
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483 #define SSH1_AGENT_RSA_IDENTITIES_ANSWER 2
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484 #define SSH1_AGENTC_RSA_CHALLENGE 3
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485 #define SSH1_AGENT_RSA_RESPONSE 4
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486 #define SSH1_AGENTC_ADD_RSA_IDENTITY 7
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487 #define SSH1_AGENTC_REMOVE_RSA_IDENTITY 8
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488 #define SSH1_AGENTC_REMOVE_ALL_RSA_IDENTITIES 9 /* openssh private? */
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491 * Messages common to SSH-1 and OpenSSH's SSH-2.
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493 #define SSH_AGENT_FAILURE 5
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494 #define SSH_AGENT_SUCCESS 6
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497 * OpenSSH's SSH-2 agent messages.
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499 #define SSH2_AGENTC_REQUEST_IDENTITIES 11
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500 #define SSH2_AGENT_IDENTITIES_ANSWER 12
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501 #define SSH2_AGENTC_SIGN_REQUEST 13
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502 #define SSH2_AGENT_SIGN_RESPONSE 14
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503 #define SSH2_AGENTC_ADD_IDENTITY 17
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504 #define SSH2_AGENTC_REMOVE_IDENTITY 18
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505 #define SSH2_AGENTC_REMOVE_ALL_IDENTITIES 19
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508 * Need this to warn about support for the original SSH-2 keyfile
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511 void old_keyfile_warning(void);
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