+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);
+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 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);