git.distorted.org.uk Git - u/mdw/putty/blob - ssh.h

   1 #include <string.h>
   2
   3 /*
   4  * Useful thing.
   5  */
   6 #ifndef lenof
   7 #define lenof(x) ( (sizeof((x))) / (sizeof(*(x))))
   8 #endif
   9
  10 #define SSH_CIPHER_IDEA         1
  11 #define SSH_CIPHER_DES          2
  12 #define SSH_CIPHER_3DES         3
  13 #define SSH_CIPHER_BLOWFISH     6
  14
  15 #ifdef MSCRYPTOAPI
  16 #define APIEXTRA 8
  17 #else
  18 #define APIEXTRA 0
  19 #endif
  20
  21 struct RSAKey {
  22     int bits;
  23     int bytes;
  24 #ifdef MSCRYPTOAPI
  25     unsigned long exponent;
  26     unsigned char *modulus;
  27 #else
  28     void *modulus;
  29     void *exponent;
  30 #endif
  31 };
  32
  33 int makekey(unsigned char *data, struct RSAKey *result,
  34             unsigned char **keystr);
  35 void rsaencrypt(unsigned char *data, int length, struct RSAKey *key);
  36 int rsastr_len(struct RSAKey *key);
  37 void rsastr_fmt(char *str, struct RSAKey *key);
  38
  39 typedef unsigned int word32;
  40 typedef unsigned int uint32;
  41
  42 unsigned long crc32(const void *s, size_t len);
  43
  44 typedef struct {
  45     uint32 h[4];
  46 } MD5_Core_State;
  47
  48 struct MD5Context {
  49 #ifdef MSCRYPTOAPI
  50     unsigned long hHash;
  51 #else
  52     MD5_Core_State core;
  53     unsigned char block[64];
  54     int blkused;
  55     uint32 lenhi, lenlo;
  56 #endif
  57 };
  58
  59 void MD5Init(struct MD5Context *context);
  60 void MD5Update(struct MD5Context *context, unsigned char const *buf,
  61                unsigned len);
  62 void MD5Final(unsigned char digest[16], struct MD5Context *context);
  63
  64 typedef struct {
  65     uint32 h[5];
  66     unsigned char block[64];
  67     int blkused;
  68     uint32 lenhi, lenlo;
  69 } SHA_State;
  70
  71 void SHA_Init(SHA_State *s);
  72 void SHA_Bytes(SHA_State *s, void *p, int len);
  73 void SHA_Final(SHA_State *s, unsigned char *output);
  74
  75 struct ssh_cipher {
  76     void (*sesskey)(unsigned char *key);
  77     void (*encrypt)(unsigned char *blk, int len);
  78     void (*decrypt)(unsigned char *blk, int len);
  79     char *name;
  80     int blksize;
  81 };
  82
  83 struct ssh_mac {
  84     void (*sesskey)(unsigned char *key, int len);
  85     void (*generate)(unsigned char *blk, int len, unsigned long seq);
  86     int (*verify)(unsigned char *blk, int len, unsigned long seq);
  87     char *name;
  88     int len;
  89 };
  90
  91 struct ssh_kex {
  92     char *name;
  93 };
  94
  95 struct ssh_hostkey {
  96     char *name;
  97 };
  98
  99 struct ssh_compress {
 100     char *name;
 101 };
 102
 103 #ifndef MSCRYPTOAPI
 104 void SHATransform(word32 *digest, word32 *data);
 105 #endif
 106
 107 int random_byte(void);
 108 void random_add_noise(void *noise, int length);
 109
 110 void logevent (char *);
 111
 112 /*
 113  * A Bignum is stored as a sequence of `unsigned short' words. The
 114  * first tells how many remain; the remaining ones are digits, LS
 115  * first.
 116  */
 117 typedef unsigned short *Bignum;
 118
 119 Bignum newbn(int length);
 120 void freebn(Bignum b);
 121 void modpow(Bignum base, Bignum exp, Bignum mod, Bignum result);
 122
 123 Bignum dh_create_e(void);
 124 Bignum dh_find_K(Bignum f);