зеркало из https://github.com/github/putty.git
305 строки
9.2 KiB
C
305 строки
9.2 KiB
C
#include <string.h>
|
|
|
|
#include "puttymem.h"
|
|
|
|
/*
|
|
* Useful thing.
|
|
*/
|
|
#ifndef lenof
|
|
#define lenof(x) ( (sizeof((x))) / (sizeof(*(x))))
|
|
#endif
|
|
|
|
#define SSH_CIPHER_IDEA 1
|
|
#define SSH_CIPHER_DES 2
|
|
#define SSH_CIPHER_3DES 3
|
|
#define SSH_CIPHER_BLOWFISH 6
|
|
|
|
#ifdef MSCRYPTOAPI
|
|
#define APIEXTRA 8
|
|
#else
|
|
#define APIEXTRA 0
|
|
#endif
|
|
|
|
#ifndef BIGNUM_INTERNAL
|
|
typedef void *Bignum;
|
|
#endif
|
|
|
|
struct RSAKey {
|
|
int bits;
|
|
int bytes;
|
|
#ifdef MSCRYPTOAPI
|
|
unsigned long exponent;
|
|
unsigned char *modulus;
|
|
#else
|
|
Bignum modulus;
|
|
Bignum exponent;
|
|
Bignum private_exponent;
|
|
Bignum p;
|
|
Bignum q;
|
|
Bignum iqmp;
|
|
#endif
|
|
char *comment;
|
|
};
|
|
|
|
int makekey(unsigned char *data, struct RSAKey *result,
|
|
unsigned char **keystr, int order);
|
|
int makeprivate(unsigned char *data, struct RSAKey *result);
|
|
void rsaencrypt(unsigned char *data, int length, struct RSAKey *key);
|
|
Bignum rsadecrypt(Bignum input, struct RSAKey *key);
|
|
void rsasign(unsigned char *data, int length, struct RSAKey *key);
|
|
void rsasanitise(struct RSAKey *key);
|
|
int rsastr_len(struct RSAKey *key);
|
|
void rsastr_fmt(char *str, struct RSAKey *key);
|
|
void rsa_fingerprint(char *str, int len, struct RSAKey *key);
|
|
int rsa_verify(struct RSAKey *key);
|
|
void freersakey(struct RSAKey *key);
|
|
|
|
typedef unsigned int word32;
|
|
typedef unsigned int uint32;
|
|
|
|
unsigned long crc32(const void *s, size_t len);
|
|
|
|
typedef struct {
|
|
uint32 h[4];
|
|
} MD5_Core_State;
|
|
|
|
struct MD5Context {
|
|
#ifdef MSCRYPTOAPI
|
|
unsigned long hHash;
|
|
#else
|
|
MD5_Core_State core;
|
|
unsigned char block[64];
|
|
int blkused;
|
|
uint32 lenhi, lenlo;
|
|
#endif
|
|
};
|
|
|
|
void MD5Init(struct MD5Context *context);
|
|
void MD5Update(struct MD5Context *context, unsigned char const *buf,
|
|
unsigned len);
|
|
void MD5Final(unsigned char digest[16], struct MD5Context *context);
|
|
|
|
typedef struct {
|
|
uint32 h[5];
|
|
unsigned char block[64];
|
|
int blkused;
|
|
uint32 lenhi, lenlo;
|
|
} SHA_State;
|
|
|
|
void SHA_Init(SHA_State *s);
|
|
void SHA_Bytes(SHA_State *s, void *p, int len);
|
|
void SHA_Final(SHA_State *s, unsigned char *output);
|
|
void SHA_Simple(void *p, int len, unsigned char *output);
|
|
|
|
struct ssh_cipher {
|
|
void (*sesskey)(unsigned char *key); /* for ssh 1 */
|
|
void (*encrypt)(unsigned char *blk, int len);
|
|
void (*decrypt)(unsigned char *blk, int len);
|
|
int blksize;
|
|
};
|
|
|
|
struct ssh2_cipher {
|
|
void (*setcsiv)(unsigned char *key); /* for ssh 2 */
|
|
void (*setcskey)(unsigned char *key); /* for ssh 2 */
|
|
void (*setsciv)(unsigned char *key); /* for ssh 2 */
|
|
void (*setsckey)(unsigned char *key); /* for ssh 2 */
|
|
void (*encrypt)(unsigned char *blk, int len);
|
|
void (*decrypt)(unsigned char *blk, int len);
|
|
char *name;
|
|
int blksize;
|
|
int keylen;
|
|
};
|
|
|
|
struct ssh2_ciphers {
|
|
int nciphers;
|
|
const struct ssh2_cipher *const *list;
|
|
};
|
|
|
|
struct ssh_mac {
|
|
void (*setcskey)(unsigned char *key);
|
|
void (*setsckey)(unsigned char *key);
|
|
void (*generate)(unsigned char *blk, int len, unsigned long seq);
|
|
int (*verify)(unsigned char *blk, int len, unsigned long seq);
|
|
char *name;
|
|
int len;
|
|
};
|
|
|
|
struct ssh_kex {
|
|
/*
|
|
* Plugging in another KEX algorithm requires structural chaos,
|
|
* so it's hard to abstract them into nice little structures
|
|
* like this. Hence, for the moment, this is just a
|
|
* placeholder. I claim justification in the fact that OpenSSH
|
|
* does this too :-)
|
|
*/
|
|
char *name;
|
|
};
|
|
|
|
struct ssh_signkey {
|
|
void *(*newkey)(char *data, int len);
|
|
void (*freekey)(void *key);
|
|
char *(*fmtkey)(void *key);
|
|
unsigned char *(*public_blob)(void *key, int *len);
|
|
unsigned char *(*private_blob)(void *key, int *len);
|
|
void *(*createkey)(unsigned char *pub_blob, int pub_len,
|
|
unsigned char *priv_blob, int priv_len);
|
|
void *(*openssh_createkey)(unsigned char **blob, int *len);
|
|
int (*openssh_fmtkey)(void *key, unsigned char *blob, int len);
|
|
char *(*fingerprint)(void *key);
|
|
int (*verifysig)(void *key, char *sig, int siglen,
|
|
char *data, int datalen);
|
|
unsigned char *(*sign)(void *key, char *data, int datalen, int *siglen);
|
|
char *name;
|
|
char *keytype; /* for host key cache */
|
|
};
|
|
|
|
struct ssh_compress {
|
|
char *name;
|
|
void (*compress_init)(void);
|
|
int (*compress)(unsigned char *block, int len,
|
|
unsigned char **outblock, int *outlen);
|
|
void (*decompress_init)(void);
|
|
int (*decompress)(unsigned char *block, int len,
|
|
unsigned char **outblock, int *outlen);
|
|
int (*disable_compression)(void);
|
|
};
|
|
|
|
struct ssh2_userkey {
|
|
const struct ssh_signkey *alg; /* the key algorithm */
|
|
void *data; /* the key data */
|
|
char *comment; /* the key comment */
|
|
};
|
|
|
|
extern const struct ssh_cipher ssh_3des;
|
|
extern const struct ssh_cipher ssh_des;
|
|
extern const struct ssh_cipher ssh_blowfish_ssh1;
|
|
extern const struct ssh2_ciphers ssh2_3des;
|
|
extern const struct ssh2_ciphers ssh2_aes;
|
|
extern const struct ssh2_ciphers ssh2_blowfish;
|
|
extern const struct ssh_kex ssh_diffiehellman;
|
|
extern const struct ssh_kex ssh_diffiehellman_gex;
|
|
extern const struct ssh_signkey ssh_dss;
|
|
extern const struct ssh_signkey ssh_rsa;
|
|
extern const struct ssh_mac ssh_md5;
|
|
extern const struct ssh_mac ssh_sha1;
|
|
extern const struct ssh_mac ssh_sha1_buggy;
|
|
|
|
/*
|
|
* PuTTY version number formatted as an SSH version string.
|
|
*/
|
|
extern char sshver[];
|
|
|
|
#ifndef MSCRYPTOAPI
|
|
void SHATransform(word32 *digest, word32 *data);
|
|
#endif
|
|
|
|
int random_byte(void);
|
|
void random_add_noise(void *noise, int length);
|
|
void random_add_heavynoise(void *noise, int length);
|
|
|
|
void logevent (char *);
|
|
|
|
Bignum copybn(Bignum b);
|
|
Bignum bn_power_2(int n);
|
|
void bn_restore_invariant(Bignum b);
|
|
Bignum bignum_from_short(unsigned short n);
|
|
void freebn(Bignum b);
|
|
Bignum modpow(Bignum base, Bignum exp, Bignum mod);
|
|
Bignum modmul(Bignum a, Bignum b, Bignum mod);
|
|
void decbn(Bignum n);
|
|
extern Bignum Zero, One;
|
|
Bignum bignum_from_bytes(unsigned char *data, int nbytes);
|
|
int ssh1_read_bignum(unsigned char *data, Bignum *result);
|
|
int bignum_bitcount(Bignum bn);
|
|
int ssh1_bignum_length(Bignum bn);
|
|
int ssh2_bignum_length(Bignum bn);
|
|
int bignum_byte(Bignum bn, int i);
|
|
int bignum_bit(Bignum bn, int i);
|
|
void bignum_set_bit(Bignum bn, int i, int value);
|
|
int ssh1_write_bignum(void *data, Bignum bn);
|
|
Bignum biggcd(Bignum a, Bignum b);
|
|
unsigned short bignum_mod_short(Bignum number, unsigned short modulus);
|
|
Bignum bignum_add_long(Bignum number, unsigned long addend);
|
|
Bignum bigmul(Bignum a, Bignum b);
|
|
Bignum modinv(Bignum number, Bignum modulus);
|
|
Bignum bignum_bitmask(Bignum number);
|
|
Bignum bignum_rshift(Bignum number, int shift);
|
|
int bignum_cmp(Bignum a, Bignum b);
|
|
char *bignum_decimal(Bignum x);
|
|
|
|
void dh_setup_group1(void);
|
|
void dh_setup_group(Bignum pval, Bignum gval);
|
|
void dh_cleanup(void);
|
|
Bignum dh_create_e(int nbits);
|
|
Bignum dh_find_K(Bignum f);
|
|
|
|
int loadrsakey(char *filename, struct RSAKey *key, char *passphrase);
|
|
int rsakey_encrypted(char *filename, char **comment);
|
|
|
|
int saversakey(char *filename, struct RSAKey *key, char *passphrase);
|
|
|
|
void base64_encode_atom(unsigned char *data, int n, char *out);
|
|
|
|
/* ssh2_load_userkey can return this as an error */
|
|
extern struct ssh2_userkey ssh2_wrong_passphrase;
|
|
#define SSH2_WRONG_PASSPHRASE (&ssh2_wrong_passphrase)
|
|
|
|
int ssh2_userkey_encrypted(char *filename, char **comment);
|
|
struct ssh2_userkey *ssh2_load_userkey(char *filename, char *passphrase);
|
|
char *ssh2_userkey_loadpub(char *filename, char **algorithm, int *pub_blob_len);
|
|
int ssh2_save_userkey(char *filename, struct ssh2_userkey *key, char *passphrase);
|
|
|
|
int keyfile_version(char *filename);
|
|
|
|
void des3_decrypt_pubkey(unsigned char *key, unsigned char *blk, int len);
|
|
void des3_encrypt_pubkey(unsigned char *key, unsigned char *blk, int len);
|
|
void aes256_encrypt_pubkey(unsigned char *key, unsigned char *blk, int len);
|
|
void aes256_decrypt_pubkey(unsigned char *key, unsigned char *blk, int len);
|
|
|
|
/*
|
|
* For progress updates in the key generation utility.
|
|
*/
|
|
typedef void (*progfn_t)(void *param, int phase, int progress);
|
|
|
|
int rsa_generate(struct RSAKey *key, int bits, progfn_t pfn, void *pfnparam);
|
|
Bignum primegen(int bits, int modulus, int residue,
|
|
int phase, progfn_t pfn, void *pfnparam);
|
|
|
|
/*
|
|
* zlib compression.
|
|
*/
|
|
void zlib_compress_init(void);
|
|
void zlib_decompress_init(void);
|
|
int zlib_compress_block(unsigned char *block, int len,
|
|
unsigned char **outblock, int *outlen);
|
|
int zlib_decompress_block(unsigned char *block, int len,
|
|
unsigned char **outblock, int *outlen);
|
|
|
|
/*
|
|
* SSH1 agent messages.
|
|
*/
|
|
#define SSH1_AGENTC_REQUEST_RSA_IDENTITIES 1
|
|
#define SSH1_AGENT_RSA_IDENTITIES_ANSWER 2
|
|
#define SSH1_AGENTC_RSA_CHALLENGE 3
|
|
#define SSH1_AGENT_RSA_RESPONSE 4
|
|
#define SSH1_AGENTC_ADD_RSA_IDENTITY 7
|
|
#define SSH1_AGENTC_REMOVE_RSA_IDENTITY 8
|
|
#define SSH1_AGENTC_REMOVE_ALL_RSA_IDENTITIES 9 /* openssh private? */
|
|
|
|
/*
|
|
* Messages common to SSH1 and OpenSSH's SSH2.
|
|
*/
|
|
#define SSH_AGENT_FAILURE 5
|
|
#define SSH_AGENT_SUCCESS 6
|
|
|
|
/*
|
|
* OpenSSH's SSH2 agent messages.
|
|
*/
|
|
#define SSH2_AGENTC_REQUEST_IDENTITIES 11
|
|
#define SSH2_AGENT_IDENTITIES_ANSWER 12
|
|
#define SSH2_AGENTC_SIGN_REQUEST 13
|
|
#define SSH2_AGENT_SIGN_RESPONSE 14
|
|
#define SSH2_AGENTC_ADD_IDENTITY 17
|
|
#define SSH2_AGENTC_REMOVE_IDENTITY 18
|
|
#define SSH2_AGENTC_REMOVE_ALL_IDENTITIES 19
|