00001 #include <string.h>
00002
00003 #include "puttymem.h"
00004 #include "network.h"
00005 #include "int64.h"
00006
00007 struct ssh_channel;
00008
00009 extern void sshfwd_close(struct ssh_channel *c);
00010 extern int sshfwd_write(struct ssh_channel *c, char *, int);
00011 extern void sshfwd_unthrottle(struct ssh_channel *c, int bufsize);
00012
00013
00014
00015
00016 #ifndef lenof
00017 #define lenof(x) ( (sizeof((x))) / (sizeof(*(x))))
00018 #endif
00019
00020 #define SSH_CIPHER_IDEA 1
00021 #define SSH_CIPHER_DES 2
00022 #define SSH_CIPHER_3DES 3
00023 #define SSH_CIPHER_BLOWFISH 6
00024
00025 #ifdef MSCRYPTOAPI
00026 #define APIEXTRA 8
00027 #else
00028 #define APIEXTRA 0
00029 #endif
00030
00031 #ifndef BIGNUM_INTERNAL
00032 typedef void *Bignum;
00033 #endif
00034
00035 struct RSAKey {
00036 int bits;
00037 int bytes;
00038 #ifdef MSCRYPTOAPI
00039 unsigned long exponent;
00040 unsigned char *modulus;
00041 #else
00042 Bignum modulus;
00043 Bignum exponent;
00044 Bignum private_exponent;
00045 Bignum p;
00046 Bignum q;
00047 Bignum iqmp;
00048 #endif
00049 char *comment;
00050 };
00051
00052 struct dss_key {
00053 Bignum p, q, g, y, x;
00054 };
00055
00056 int makekey(unsigned char *data, struct RSAKey *result,
00057 unsigned char **keystr, int order);
00058 int makeprivate(unsigned char *data, struct RSAKey *result);
00059 void rsaencrypt(unsigned char *data, int length, struct RSAKey *key);
00060 Bignum rsadecrypt(Bignum input, struct RSAKey *key);
00061 void rsasign(unsigned char *data, int length, struct RSAKey *key);
00062 void rsasanitise(struct RSAKey *key);
00063 int rsastr_len(struct RSAKey *key);
00064 void rsastr_fmt(char *str, struct RSAKey *key);
00065 void rsa_fingerprint(char *str, int len, struct RSAKey *key);
00066 int rsa_verify(struct RSAKey *key);
00067 unsigned char *rsa_public_blob(struct RSAKey *key, int *len);
00068 int rsa_public_blob_len(void *data);
00069 void freersakey(struct RSAKey *key);
00070
00071 typedef unsigned int word32;
00072 typedef unsigned int uint32;
00073
00074 unsigned long crc32(const void *s, size_t len);
00075 unsigned long crc32_update(unsigned long crc_input, const void *s, size_t len);
00076
00077
00078 int detect_attack(unsigned char *buf, uint32 len, unsigned char *IV);
00079
00080 typedef struct {
00081 uint32 h[4];
00082 } MD5_Core_State;
00083
00084 struct MD5Context {
00085 #ifdef MSCRYPTOAPI
00086 unsigned long hHash;
00087 #else
00088 MD5_Core_State core;
00089 unsigned char block[64];
00090 int blkused;
00091 uint32 lenhi, lenlo;
00092 #endif
00093 };
00094
00095 void MD5Init(struct MD5Context *context);
00096 void MD5Update(struct MD5Context *context, unsigned char const *buf,
00097 unsigned len);
00098 void MD5Final(unsigned char digest[16], struct MD5Context *context);
00099
00100 typedef struct {
00101 uint32 h[5];
00102 unsigned char block[64];
00103 int blkused;
00104 uint32 lenhi, lenlo;
00105 } SHA_State;
00106 void SHA_Init(SHA_State * s);
00107 void SHA_Bytes(SHA_State * s, void *p, int len);
00108 void SHA_Final(SHA_State * s, unsigned char *output);
00109 void SHA_Simple(void *p, int len, unsigned char *output);
00110
00111 void hmac_sha1_simple(void *key, int keylen, void *data, int datalen,
00112 unsigned char *output);
00113
00114 typedef struct {
00115 uint64 h[8];
00116 unsigned char block[128];
00117 int blkused;
00118 uint32 len[4];
00119 } SHA512_State;
00120 void SHA512_Init(SHA512_State * s);
00121 void SHA512_Bytes(SHA512_State * s, const void *p, int len);
00122 void SHA512_Final(SHA512_State * s, unsigned char *output);
00123 void SHA512_Simple(const void *p, int len, unsigned char *output);
00124
00125 struct ssh_cipher {
00126 void (*sesskey) (unsigned char *key);
00127 void (*encrypt) (unsigned char *blk, int len);
00128 void (*decrypt) (unsigned char *blk, int len);
00129 int blksize;
00130 };
00131
00132 struct ssh2_cipher {
00133 void (*setcsiv) (unsigned char *key);
00134 void (*setcskey) (unsigned char *key);
00135 void (*setsciv) (unsigned char *key);
00136 void (*setsckey) (unsigned char *key);
00137 void (*encrypt) (unsigned char *blk, int len);
00138 void (*decrypt) (unsigned char *blk, int len);
00139 char *name;
00140 int blksize;
00141 int keylen;
00142 };
00143
00144 struct ssh2_ciphers {
00145 int nciphers;
00146 const struct ssh2_cipher *const *list;
00147 };
00148
00149 struct ssh_mac {
00150 void (*setcskey) (unsigned char *key);
00151 void (*setsckey) (unsigned char *key);
00152 void (*generate) (unsigned char *blk, int len, unsigned long seq);
00153 int (*verify) (unsigned char *blk, int len, unsigned long seq);
00154 char *name;
00155 int len;
00156 };
00157
00158 struct ssh_kex {
00159
00160
00161
00162
00163
00164
00165
00166 char *name;
00167 };
00168
00169 struct ssh_signkey {
00170 void *(*newkey) (char *data, int len);
00171 void (*freekey) (void *key);
00172 char *(*fmtkey) (void *key);
00173 unsigned char *(*public_blob) (void *key, int *len);
00174 unsigned char *(*private_blob) (void *key, int *len);
00175 void *(*createkey) (unsigned char *pub_blob, int pub_len,
00176 unsigned char *priv_blob, int priv_len);
00177 void *(*openssh_createkey) (unsigned char **blob, int *len);
00178 int (*openssh_fmtkey) (void *key, unsigned char *blob, int len);
00179 char *(*fingerprint) (void *key);
00180 int (*verifysig) (void *key, char *sig, int siglen,
00181 char *data, int datalen);
00182 unsigned char *(*sign) (void *key, char *data, int datalen,
00183 int *siglen);
00184 char *name;
00185 char *keytype;
00186 };
00187
00188 struct ssh_compress {
00189 char *name;
00190 void (*compress_init) (void);
00191 int (*compress) (unsigned char *block, int len,
00192 unsigned char **outblock, int *outlen);
00193 void (*decompress_init) (void);
00194 int (*decompress) (unsigned char *block, int len,
00195 unsigned char **outblock, int *outlen);
00196 int (*disable_compression) (void);
00197 };
00198
00199 struct ssh2_userkey {
00200 const struct ssh_signkey *alg;
00201 void *data;
00202 char *comment;
00203 };
00204
00205 extern const struct ssh_cipher ssh_3des;
00206 extern const struct ssh_cipher ssh_des;
00207 extern const struct ssh_cipher ssh_blowfish_ssh1;
00208 extern const struct ssh2_ciphers ssh2_3des;
00209 extern const struct ssh2_ciphers ssh2_des;
00210 extern const struct ssh2_ciphers ssh2_aes;
00211 extern const struct ssh2_ciphers ssh2_blowfish;
00212 extern const struct ssh_kex ssh_diffiehellman;
00213 extern const struct ssh_kex ssh_diffiehellman_gex;
00214 extern const struct ssh_signkey ssh_dss;
00215 extern const struct ssh_signkey ssh_rsa;
00216 extern const struct ssh_mac ssh_md5;
00217 extern const struct ssh_mac ssh_sha1;
00218 extern const struct ssh_mac ssh_sha1_buggy;
00219
00220
00221
00222
00223 extern char sshver[];
00224
00225
00226
00227
00228
00229
00230 extern int ssh_fallback_cmd;
00231
00232 #ifndef MSCRYPTOAPI
00233 void SHATransform(word32 * digest, word32 * data);
00234 #endif
00235
00236 int random_byte(void);
00237 void random_add_noise(void *noise, int length);
00238 void random_add_heavynoise(void *noise, int length);
00239
00240 void logevent(char *);
00241 void *new_sock_channel(Socket s);
00242 void ssh_send_port_open(void *channel, char *hostname, int port, char *org);
00243
00244 Bignum copybn(Bignum b);
00245 Bignum bn_power_2(int n);
00246 void bn_restore_invariant(Bignum b);
00247 Bignum bignum_from_long(unsigned long n);
00248 void freebn(Bignum b);
00249 Bignum modpow(Bignum base, Bignum exp, Bignum mod);
00250 Bignum modmul(Bignum a, Bignum b, Bignum mod);
00251 void decbn(Bignum n);
00252 extern Bignum Zero, One;
00253 Bignum bignum_from_bytes(unsigned char *data, int nbytes);
00254 int ssh1_read_bignum(unsigned char *data, Bignum * result);
00255 int bignum_bitcount(Bignum bn);
00256 int ssh1_bignum_length(Bignum bn);
00257 int ssh2_bignum_length(Bignum bn);
00258 int bignum_byte(Bignum bn, int i);
00259 int bignum_bit(Bignum bn, int i);
00260 void bignum_set_bit(Bignum bn, int i, int value);
00261 int ssh1_write_bignum(void *data, Bignum bn);
00262 Bignum biggcd(Bignum a, Bignum b);
00263 unsigned short bignum_mod_short(Bignum number, unsigned short modulus);
00264 Bignum bignum_add_long(Bignum number, unsigned long addend);
00265 Bignum bigmul(Bignum a, Bignum b);
00266 Bignum bigmuladd(Bignum a, Bignum b, Bignum addend);
00267 Bignum bigdiv(Bignum a, Bignum b);
00268 Bignum bigmod(Bignum a, Bignum b);
00269 Bignum modinv(Bignum number, Bignum modulus);
00270 Bignum bignum_bitmask(Bignum number);
00271 Bignum bignum_rshift(Bignum number, int shift);
00272 int bignum_cmp(Bignum a, Bignum b);
00273 char *bignum_decimal(Bignum x);
00274
00275 void dh_setup_group1(void);
00276 void dh_setup_group(Bignum pval, Bignum gval);
00277 void dh_cleanup(void);
00278 Bignum dh_create_e(int nbits);
00279 Bignum dh_find_K(Bignum f);
00280
00281 int loadrsakey(char *filename, struct RSAKey *key, char *passphrase);
00282 int rsakey_encrypted(char *filename, char **comment);
00283 int rsakey_pubblob(char *filename, void **blob, int *bloblen);
00284
00285 int saversakey(char *filename, struct RSAKey *key, char *passphrase);
00286
00287 void base64_encode_atom(unsigned char *data, int n, char *out);
00288
00289
00290 extern struct ssh2_userkey ssh2_wrong_passphrase;
00291 #define SSH2_WRONG_PASSPHRASE (&ssh2_wrong_passphrase)
00292
00293 int ssh2_userkey_encrypted(char *filename, char **comment);
00294 struct ssh2_userkey *ssh2_load_userkey(char *filename, char *passphrase);
00295 char *ssh2_userkey_loadpub(char *filename, char **algorithm,
00296 int *pub_blob_len);
00297 int ssh2_save_userkey(char *filename, struct ssh2_userkey *key,
00298 char *passphrase);
00299
00300 enum {
00301 SSH_KEYTYPE_UNOPENABLE,
00302 SSH_KEYTYPE_UNKNOWN,
00303 SSH_KEYTYPE_SSH1, SSH_KEYTYPE_SSH2,
00304 SSH_KEYTYPE_OPENSSH, SSH_KEYTYPE_SSHCOM
00305 };
00306 int key_type(char *filename);
00307 char *key_type_to_str(int type);
00308
00309 int import_possible(int type);
00310 int import_target_type(int type);
00311 int import_encrypted(char *filename, int type, char **comment);
00312 int import_ssh1(char *filename, int type, struct RSAKey *key,char *passphrase);
00313 struct ssh2_userkey *import_ssh2(char *filename, int type, char *passphrase);
00314 int export_ssh1(char *filename, int type, struct RSAKey *key,char *passphrase);
00315 int export_ssh2(char *filename, int type,
00316 struct ssh2_userkey *key, char *passphrase);
00317
00318 void des3_decrypt_pubkey(unsigned char *key, unsigned char *blk, int len);
00319 void des3_encrypt_pubkey(unsigned char *key, unsigned char *blk, int len);
00320 void des3_decrypt_pubkey_ossh(unsigned char *key, unsigned char *iv,
00321 unsigned char *blk, int len);
00322 void des3_encrypt_pubkey_ossh(unsigned char *key, unsigned char *iv,
00323 unsigned char *blk, int len);
00324 void aes256_encrypt_pubkey(unsigned char *key, unsigned char *blk,
00325 int len);
00326 void aes256_decrypt_pubkey(unsigned char *key, unsigned char *blk,
00327 int len);
00328
00329
00330
00331
00332 #define PROGFN_INITIALISE 1
00333 #define PROGFN_LIN_PHASE 2
00334 #define PROGFN_EXP_PHASE 3
00335 #define PROGFN_PHASE_EXTENT 4
00336 #define PROGFN_READY 5
00337 #define PROGFN_PROGRESS 6
00338 typedef void (*progfn_t) (void *param, int action, int phase, int progress);
00339
00340 int rsa_generate(struct RSAKey *key, int bits, progfn_t pfn,
00341 void *pfnparam);
00342 int dsa_generate(struct dss_key *key, int bits, progfn_t pfn,
00343 void *pfnparam);
00344 Bignum primegen(int bits, int modulus, int residue, Bignum factor,
00345 int phase, progfn_t pfn, void *pfnparam);
00346
00347
00348
00349
00350
00351 void zlib_compress_init(void);
00352 void zlib_decompress_init(void);
00353 int zlib_compress_block(unsigned char *block, int len,
00354 unsigned char **outblock, int *outlen);
00355 int zlib_decompress_block(unsigned char *block, int len,
00356 unsigned char **outblock, int *outlen);
00357
00358
00359
00360
00361 #define SSH1_AGENTC_REQUEST_RSA_IDENTITIES 1
00362 #define SSH1_AGENT_RSA_IDENTITIES_ANSWER 2
00363 #define SSH1_AGENTC_RSA_CHALLENGE 3
00364 #define SSH1_AGENT_RSA_RESPONSE 4
00365 #define SSH1_AGENTC_ADD_RSA_IDENTITY 7
00366 #define SSH1_AGENTC_REMOVE_RSA_IDENTITY 8
00367 #define SSH1_AGENTC_REMOVE_ALL_RSA_IDENTITIES 9
00368
00369
00370
00371
00372 #define SSH_AGENT_FAILURE 5
00373 #define SSH_AGENT_SUCCESS 6
00374
00375
00376
00377
00378 #define SSH2_AGENTC_REQUEST_IDENTITIES 11
00379 #define SSH2_AGENT_IDENTITIES_ANSWER 12
00380 #define SSH2_AGENTC_SIGN_REQUEST 13
00381 #define SSH2_AGENT_SIGN_RESPONSE 14
00382 #define SSH2_AGENTC_ADD_IDENTITY 17
00383 #define SSH2_AGENTC_REMOVE_IDENTITY 18
00384 #define SSH2_AGENTC_REMOVE_ALL_IDENTITIES 19
00385
00386
00387
00388
00389
00390 void old_keyfile_warning(void);