зеркало из https://github.com/github/putty.git
297 строки
9.0 KiB
C
297 строки
9.0 KiB
C
#include <string.h>
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#include "puttymem.h"
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/*
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* Useful thing.
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*/
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#ifndef lenof
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#define lenof(x) ( (sizeof((x))) / (sizeof(*(x))))
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#endif
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#define SSH_CIPHER_IDEA 1
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#define SSH_CIPHER_DES 2
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#define SSH_CIPHER_3DES 3
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#define SSH_CIPHER_BLOWFISH 6
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#ifdef MSCRYPTOAPI
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#define APIEXTRA 8
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#else
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#define APIEXTRA 0
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#endif
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#ifndef BIGNUM_INTERNAL
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typedef void *Bignum;
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#endif
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struct RSAKey {
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int bits;
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int bytes;
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#ifdef MSCRYPTOAPI
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unsigned long exponent;
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unsigned char *modulus;
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#else
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Bignum modulus;
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Bignum exponent;
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Bignum private_exponent;
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Bignum p;
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Bignum q;
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Bignum iqmp;
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#endif
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char *comment;
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};
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int makekey(unsigned char *data, struct RSAKey *result,
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unsigned char **keystr, int order);
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int makeprivate(unsigned char *data, struct RSAKey *result);
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void rsaencrypt(unsigned char *data, int length, struct RSAKey *key);
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Bignum rsadecrypt(Bignum input, struct RSAKey *key);
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void rsasign(unsigned char *data, int length, struct RSAKey *key);
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void rsasanitise(struct RSAKey *key);
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int rsastr_len(struct RSAKey *key);
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void rsastr_fmt(char *str, struct RSAKey *key);
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void rsa_fingerprint(char *str, int len, struct RSAKey *key);
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void freersakey(struct RSAKey *key);
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typedef unsigned int word32;
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typedef unsigned int uint32;
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unsigned long crc32(const void *s, size_t len);
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typedef struct {
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uint32 h[4];
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} MD5_Core_State;
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struct MD5Context {
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#ifdef MSCRYPTOAPI
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unsigned long hHash;
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#else
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MD5_Core_State core;
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unsigned char block[64];
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int blkused;
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uint32 lenhi, lenlo;
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#endif
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};
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void MD5Init(struct MD5Context *context);
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void MD5Update(struct MD5Context *context, unsigned char const *buf,
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unsigned len);
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void MD5Final(unsigned char digest[16], struct MD5Context *context);
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typedef struct {
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uint32 h[5];
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unsigned char block[64];
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int blkused;
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uint32 lenhi, lenlo;
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} SHA_State;
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void SHA_Init(SHA_State *s);
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void SHA_Bytes(SHA_State *s, void *p, int len);
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void SHA_Final(SHA_State *s, unsigned char *output);
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void SHA_Simple(void *p, int len, unsigned char *output);
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struct ssh_cipher {
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void (*sesskey)(unsigned char *key); /* for ssh 1 */
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void (*encrypt)(unsigned char *blk, int len);
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void (*decrypt)(unsigned char *blk, int len);
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int blksize;
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};
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struct ssh2_cipher {
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void (*setcsiv)(unsigned char *key); /* for ssh 2 */
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void (*setcskey)(unsigned char *key); /* for ssh 2 */
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void (*setsciv)(unsigned char *key); /* for ssh 2 */
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void (*setsckey)(unsigned char *key); /* for ssh 2 */
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void (*encrypt)(unsigned char *blk, int len);
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void (*decrypt)(unsigned char *blk, int len);
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char *name;
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int blksize;
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int keylen;
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};
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struct ssh2_ciphers {
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int nciphers;
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const struct ssh2_cipher *const *list;
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};
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struct ssh_mac {
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void (*setcskey)(unsigned char *key);
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void (*setsckey)(unsigned char *key);
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void (*generate)(unsigned char *blk, int len, unsigned long seq);
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int (*verify)(unsigned char *blk, int len, unsigned long seq);
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char *name;
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int len;
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};
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struct ssh_kex {
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/*
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* Plugging in another KEX algorithm requires structural chaos,
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* so it's hard to abstract them into nice little structures
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* like this. Hence, for the moment, this is just a
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* placeholder. I claim justification in the fact that OpenSSH
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* does this too :-)
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*/
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char *name;
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};
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struct ssh_signkey {
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void *(*newkey)(char *data, int len);
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void (*freekey)(void *key);
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char *(*fmtkey)(void *key);
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unsigned char *(*public_blob)(void *key, int *len);
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unsigned char *(*private_blob)(void *key, int *len);
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void *(*createkey)(unsigned char *pub_blob, int pub_len,
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unsigned char *priv_blob, int priv_len);
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void *(*openssh_createkey)(unsigned char **blob, int *len);
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char *(*fingerprint)(void *key);
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int (*verifysig)(void *key, char *sig, int siglen,
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char *data, int datalen);
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unsigned char *(*sign)(void *key, char *data, int datalen, int *siglen);
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char *name;
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char *keytype; /* for host key cache */
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};
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struct ssh_compress {
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char *name;
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void (*compress_init)(void);
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int (*compress)(unsigned char *block, int len,
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unsigned char **outblock, int *outlen);
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void (*decompress_init)(void);
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int (*decompress)(unsigned char *block, int len,
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unsigned char **outblock, int *outlen);
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int (*disable_compression)(void);
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};
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struct ssh2_userkey {
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const struct ssh_signkey *alg; /* the key algorithm */
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void *data; /* the key data */
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char *comment; /* the key comment */
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};
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extern const struct ssh_cipher ssh_3des;
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extern const struct ssh_cipher ssh_des;
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extern const struct ssh_cipher ssh_blowfish_ssh1;
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extern const struct ssh2_ciphers ssh2_3des;
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extern const struct ssh2_ciphers ssh2_aes;
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extern const struct ssh2_ciphers ssh2_blowfish;
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extern const struct ssh_kex ssh_diffiehellman;
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extern const struct ssh_kex ssh_diffiehellman_gex;
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extern const struct ssh_signkey ssh_dss;
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extern const struct ssh_signkey ssh_rsa;
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extern const struct ssh_mac ssh_md5;
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extern const struct ssh_mac ssh_sha1;
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extern const struct ssh_mac ssh_sha1_buggy;
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#ifndef MSCRYPTOAPI
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void SHATransform(word32 *digest, word32 *data);
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#endif
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int random_byte(void);
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void random_add_noise(void *noise, int length);
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void random_add_heavynoise(void *noise, int length);
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void logevent (char *);
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Bignum copybn(Bignum b);
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Bignum bn_power_2(int n);
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void bn_restore_invariant(Bignum b);
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Bignum bignum_from_short(unsigned short n);
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void freebn(Bignum b);
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Bignum modpow(Bignum base, Bignum exp, Bignum mod);
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Bignum modmul(Bignum a, Bignum b, Bignum mod);
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void decbn(Bignum n);
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extern Bignum Zero, One;
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Bignum bignum_from_bytes(unsigned char *data, int nbytes);
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int ssh1_read_bignum(unsigned char *data, Bignum *result);
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int ssh1_bignum_bitcount(Bignum bn);
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int ssh1_bignum_length(Bignum bn);
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int bignum_byte(Bignum bn, int i);
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int bignum_bit(Bignum bn, int i);
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void bignum_set_bit(Bignum bn, int i, int value);
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int ssh1_write_bignum(void *data, Bignum bn);
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Bignum biggcd(Bignum a, Bignum b);
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unsigned short bignum_mod_short(Bignum number, unsigned short modulus);
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Bignum bignum_add_long(Bignum number, unsigned long addend);
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Bignum bigmul(Bignum a, Bignum b);
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Bignum modinv(Bignum number, Bignum modulus);
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Bignum bignum_bitmask(Bignum number);
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Bignum bignum_rshift(Bignum number, int shift);
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int bignum_cmp(Bignum a, Bignum b);
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char *bignum_decimal(Bignum x);
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void dh_setup_group1(void);
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void dh_setup_group(Bignum pval, Bignum gval);
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void dh_cleanup(void);
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Bignum dh_create_e(int nbits);
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Bignum dh_find_K(Bignum f);
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int loadrsakey(char *filename, struct RSAKey *key, char *passphrase);
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int rsakey_encrypted(char *filename, char **comment);
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int saversakey(char *filename, struct RSAKey *key, char *passphrase);
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void base64_encode_atom(unsigned char *data, int n, char *out);
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/* ssh2_load_userkey can return this as an error */
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extern struct ssh2_userkey ssh2_wrong_passphrase;
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#define SSH2_WRONG_PASSPHRASE (&ssh2_wrong_passphrase)
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int ssh2_userkey_encrypted(char *filename, char **comment);
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struct ssh2_userkey *ssh2_load_userkey(char *filename, char *passphrase);
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char *ssh2_userkey_loadpub(char *filename, char **algorithm, int *pub_blob_len);
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int ssh2_save_userkey(char *filename, struct ssh2_userkey *key, char *passphrase);
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int keyfile_version(char *filename);
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void des3_decrypt_pubkey(unsigned char *key, unsigned char *blk, int len);
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void des3_encrypt_pubkey(unsigned char *key, unsigned char *blk, int len);
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void aes256_encrypt_pubkey(unsigned char *key, unsigned char *blk, int len);
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void aes256_decrypt_pubkey(unsigned char *key, unsigned char *blk, int len);
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/*
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* For progress updates in the key generation utility.
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*/
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typedef void (*progfn_t)(void *param, int phase, int progress);
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int rsa_generate(struct RSAKey *key, int bits, progfn_t pfn, void *pfnparam);
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Bignum primegen(int bits, int modulus, int residue,
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int phase, progfn_t pfn, void *pfnparam);
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/*
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* zlib compression.
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*/
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void zlib_compress_init(void);
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void zlib_decompress_init(void);
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int zlib_compress_block(unsigned char *block, int len,
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unsigned char **outblock, int *outlen);
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int zlib_decompress_block(unsigned char *block, int len,
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unsigned char **outblock, int *outlen);
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/*
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* SSH1 agent messages.
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*/
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#define SSH1_AGENTC_REQUEST_RSA_IDENTITIES 1
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#define SSH1_AGENT_RSA_IDENTITIES_ANSWER 2
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#define SSH1_AGENTC_RSA_CHALLENGE 3
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#define SSH1_AGENT_RSA_RESPONSE 4
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#define SSH1_AGENTC_ADD_RSA_IDENTITY 7
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#define SSH1_AGENTC_REMOVE_RSA_IDENTITY 8
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#define SSH1_AGENTC_REMOVE_ALL_RSA_IDENTITIES 9 /* openssh private? */
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/*
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* Messages common to SSH1 and OpenSSH's SSH2.
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*/
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#define SSH_AGENT_FAILURE 5
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#define SSH_AGENT_SUCCESS 6
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/*
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* OpenSSH's SSH2 agent messages.
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*/
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#define SSH2_AGENTC_REQUEST_IDENTITIES 11
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#define SSH2_AGENT_IDENTITIES_ANSWER 12
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#define SSH2_AGENTC_SIGN_REQUEST 13
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#define SSH2_AGENT_SIGN_RESPONSE 14
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#define SSH2_AGENTC_ADD_IDENTITY 17
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#define SSH2_AGENTC_REMOVE_IDENTITY 18
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#define SSH2_AGENTC_REMOVE_ALL_IDENTITIES 19
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