#include #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; #endif char *comment; }; struct RSAAux { Bignum p; Bignum q; Bignum iqmp; }; 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); 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 (*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; }; 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); char *(*fingerprint)(void *key); int (*verifysig)(void *key, char *sig, int siglen, char *data, int datalen); int (*sign)(void *key, char *sig, int siglen, char *data, int datalen); 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); }; #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 ssh1_bignum_bitcount(Bignum bn); int ssh1_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_cleanup(void); Bignum dh_create_e(void); Bignum dh_find_K(Bignum f); int loadrsakey(char *filename, struct RSAKey *key, struct RSAAux *aux, char *passphrase); int rsakey_encrypted(char *filename, char **comment); int saversakey(char *filename, struct RSAKey *key, struct RSAAux *aux, char *passphrase); void des3_decrypt_pubkey(unsigned char *key, unsigned char *blk, int len); void des3_encrypt_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, struct RSAAux *aux, 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);