#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
+
+/*
+ * A Bignum is stored as a sequence of `unsigned short' words. The
+ * first tells how many remain; the remaining ones are digits, LS
+ * first.
+ */
+typedef unsigned short *Bignum;
+
struct RSAKey {
int bits;
int bytes;
unsigned long exponent;
unsigned char *modulus;
#else
- void *modulus;
- void *exponent;
+ 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);
+ 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 hHash;
#else
MD5_Core_State core;
- unsigned char block[BLKSIZE];
+ unsigned char block[64];
int blkused;
uint32 lenhi, lenlo;
#endif
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);
+ 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
int random_byte(void);
void random_add_noise(void *noise, int length);
+void random_add_heavynoise(void *noise, int length);
void logevent (char *);
+
+Bignum newbn(int length);
+Bignum copybn(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;
+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_rshift(Bignum number, int shift);
+int bignum_cmp(Bignum a, Bignum b);
+char *bignum_decimal(Bignum x);
+
+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);