Rationalised host key storage. Also started code reorg: persistent-state

[u/mdw/putty] / ssh.h

diff --git a/ssh.h b/ssh.h
index a9057e7..6a49863 100644 (file)
--- a/ssh.h
+++ b/ssh.h
@@ -1,10 +1,30 @@
 #include <string.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;
@@ -12,16 +32,24 @@ struct RSAKey {
     unsigned long exponent;
     unsigned char *modulus;
 #else
-    void *modulus;
-    void *exponent;
+    Bignum modulus;
+    Bignum exponent;
+    Bignum private_exponent;
 #endif
+    char *comment;
 };
 
 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;
@@ -48,10 +76,61 @@ 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);
+    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_hostkey {
+    void (*setkey)(char *data, int len);
+    char *(*fmtkey)(void);
+    char *(*fingerprint)(void);
+    int (*verifysig)(char *sig, int siglen, char *data, int datalen);
+    char *name;
+    char *keytype;                     /* for host key cache */
+};
+
+struct ssh_compress {
+    char *name;
 };
 
 #ifndef MSCRYPTOAPI
@@ -62,3 +141,25 @@ int random_byte(void);
 void random_add_noise(void *noise, int length);
 
 void logevent (char *);
+
+Bignum newbn(int length);
+Bignum copybn(Bignum b);
+void freebn(Bignum b);
+void modpow(Bignum base, Bignum exp, Bignum mod, Bignum result);
+void modmul(Bignum a, Bignum b, Bignum mod, Bignum result);
+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 ssh1_write_bignum(void *data, Bignum bn);
+
+Bignum dh_create_e(void);
+Bignum dh_find_K(Bignum f);
+
+int loadrsakey(char *filename, struct RSAKey *key, char *passphrase);
+int rsakey_encrypted(char *filename, char **comment);
+
+void des3_decrypt_pubkey(unsigned char *key,
+                         unsigned char *blk, int len);