[u/mdw/putty] / ssh.h

#include <string.h>

#include "puttymem.h"
#include "network.h"

struct ssh_channel;

extern void sshfwd_close(struct ssh_channel *c);
extern int sshfwd_write(struct ssh_channel *c, char *, int);
extern void sshfwd_unthrottle(struct ssh_channel *c, int bufsize);

/*
 * 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;
    Bignum p;
    Bignum q;
    Bignum iqmp;
#endif
    char *comment;
};

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);
int rsa_verify(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 (*encrypt) (unsigned char *blk, int len);
    void (*decrypt) (unsigned char *blk, int len);
    int blksize;
};

struct ssh2_cipher {
    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;
    int keylen;
};

struct ssh2_ciphers {
    int nciphers;
    const struct ssh2_cipher *const *list;
};

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);
    unsigned char *(*public_blob) (void *key, int *len);
    unsigned char *(*private_blob) (void *key, int *len);
    void *(*createkey) (unsigned char *pub_blob, int pub_len,
			unsigned char *priv_blob, int priv_len);
    void *(*openssh_createkey) (unsigned char **blob, int *len);
    int (*openssh_fmtkey) (void *key, unsigned char *blob, int len);
    char *(*fingerprint) (void *key);
    int (*verifysig) (void *key, char *sig, int siglen,
		      char *data, int datalen);
    unsigned char *(*sign) (void *key, char *data, int datalen,
			    int *siglen);
    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);
    int (*disable_compression) (void);
};

struct ssh2_userkey {
    const struct ssh_signkey *alg;     /* the key algorithm */
    void *data;			       /* the key data */
    char *comment;		       /* the key comment */
};

extern const struct ssh_cipher ssh_3des;
extern const struct ssh_cipher ssh_des;
extern const struct ssh_cipher ssh_blowfish_ssh1;
extern const struct ssh2_ciphers ssh2_3des;
extern const struct ssh2_ciphers ssh2_aes;
extern const struct ssh2_ciphers ssh2_blowfish;
extern const struct ssh_kex ssh_diffiehellman;
extern const struct ssh_kex ssh_diffiehellman_gex;
extern const struct ssh_signkey ssh_dss;
extern const struct ssh_signkey ssh_rsa;
extern const struct ssh_mac ssh_md5;
extern const struct ssh_mac ssh_sha1;
extern const struct ssh_mac ssh_sha1_buggy;

/*
 * PuTTY version number formatted as an SSH version string. 
 */
extern char sshver[];

/*
 * Gross hack: pscp will try to start SFTP but fall back to scp1 if
 * that fails. This variable is the means by which scp.c can reach
 * into the SSH code and find out which one it got.
 */
extern int ssh_fallback_cmd;

#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 *);
void *new_sock_channel(Socket s); // allocates and register a new channel for port forwarding
void ssh_send_port_open(void *channel, char *hostname, int port, char *org);

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 bignum_bitcount(Bignum bn);
int ssh1_bignum_length(Bignum bn);
int ssh2_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_setup_group(Bignum pval, Bignum gval);
void dh_cleanup(void);
Bignum dh_create_e(int nbits);
Bignum dh_find_K(Bignum f);

int loadrsakey(char *filename, struct RSAKey *key, char *passphrase);
int rsakey_encrypted(char *filename, char **comment);

int saversakey(char *filename, struct RSAKey *key, char *passphrase);

void base64_encode_atom(unsigned char *data, int n, char *out);

/* ssh2_load_userkey can return this as an error */
extern struct ssh2_userkey ssh2_wrong_passphrase;
#define SSH2_WRONG_PASSPHRASE (&ssh2_wrong_passphrase)

int ssh2_userkey_encrypted(char *filename, char **comment);
struct ssh2_userkey *ssh2_load_userkey(char *filename, char *passphrase);
char *ssh2_userkey_loadpub(char *filename, char **algorithm,
			   int *pub_blob_len);
int ssh2_save_userkey(char *filename, struct ssh2_userkey *key,
		      char *passphrase);

int keyfile_version(char *filename);

void des3_decrypt_pubkey(unsigned char *key, unsigned char *blk, int len);
void des3_encrypt_pubkey(unsigned char *key, unsigned char *blk, int len);
void aes256_encrypt_pubkey(unsigned char *key, unsigned char *blk,
			   int len);
void aes256_decrypt_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, 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);

/*
 * SSH1 agent messages.
 */
#define SSH1_AGENTC_REQUEST_RSA_IDENTITIES    1
#define SSH1_AGENT_RSA_IDENTITIES_ANSWER      2
#define SSH1_AGENTC_RSA_CHALLENGE             3
#define SSH1_AGENT_RSA_RESPONSE               4
#define SSH1_AGENTC_ADD_RSA_IDENTITY          7
#define SSH1_AGENTC_REMOVE_RSA_IDENTITY       8
#define SSH1_AGENTC_REMOVE_ALL_RSA_IDENTITIES 9	/* openssh private? */

/*
 * Messages common to SSH1 and OpenSSH's SSH2.
 */
#define SSH_AGENT_FAILURE                    5
#define SSH_AGENT_SUCCESS                    6

/*
 * OpenSSH's SSH2 agent messages.
 */
#define SSH2_AGENTC_REQUEST_IDENTITIES          11
#define SSH2_AGENT_IDENTITIES_ANSWER            12
#define SSH2_AGENTC_SIGN_REQUEST                13
#define SSH2_AGENT_SIGN_RESPONSE                14
#define SSH2_AGENTC_ADD_IDENTITY                17
#define SSH2_AGENTC_REMOVE_IDENTITY             18
#define SSH2_AGENTC_REMOVE_ALL_IDENTITIES       19
Commit	Line	Data
37508af4	1	#include <string.h>
37508af4	2
dcbde236	3	#include "puttymem.h"
d74d141c	4	#include "network.h"
dcbde236	5
2871113a	6	struct ssh_channel;
2871113a	7
5471d09a	8	extern void sshfwd_close(struct ssh_channel *c);
	9	extern int sshfwd_write(struct ssh_channel c, char , int);
	10	extern void sshfwd_unthrottle(struct ssh_channel *c, int bufsize);
	11
e5574168	12	/*
	13	* Useful thing.
	14	*/
	15	#ifndef lenof
	16	#define lenof(x) ( (sizeof((x))) / (sizeof(*(x))))
	17	#endif
	18
bea1ef5f	19	#define SSH_CIPHER_IDEA 1
9697bfd2	20	#define SSH_CIPHER_DES 2
bea1ef5f	21	#define SSH_CIPHER_3DES 3
	22	#define SSH_CIPHER_BLOWFISH 6
	23
e5574168	24	#ifdef MSCRYPTOAPI
	25	#define APIEXTRA 8
	26	#else
	27	#define APIEXTRA 0
	28	#endif
	29
3709bfe9	30	#ifndef BIGNUM_INTERNAL
	31	typedef void *Bignum;
	32	#endif
7cca0d81	33
374330e2	34	struct RSAKey {
	35	int bits;
	36	int bytes;
8f203108	37	#ifdef MSCRYPTOAPI
	38	unsigned long exponent;
	39	unsigned char *modulus;
	40	#else
7cca0d81	41	Bignum modulus;
	42	Bignum exponent;
	43	Bignum private_exponent;
9400cf6f	44	Bignum p;
	45	Bignum q;
	46	Bignum iqmp;
65a22376	47	#endif
65a22376	48	char *comment;
9400cf6f	49	};
9400cf6f	50
374330e2	51	int makekey(unsigned char data, struct RSAKey result,
7cca0d81	52	unsigned char **keystr, int order);
7cca0d81	53	int makeprivate(unsigned char data, struct RSAKey result);
374330e2	54	void rsaencrypt(unsigned char data, int length, struct RSAKey key);
7cca0d81	55	Bignum rsadecrypt(Bignum input, struct RSAKey *key);
	56	void rsasign(unsigned char data, int length, struct RSAKey key);
	57	void rsasanitise(struct RSAKey *key);
374330e2	58	int rsastr_len(struct RSAKey *key);
374330e2	59	void rsastr_fmt(char str, struct RSAKey key);
1c2a93c4	60	void rsa_fingerprint(char str, int len, struct RSAKey key);
014970c8	61	int rsa_verify(struct RSAKey *key);
5c58ad2d	62	void freersakey(struct RSAKey *key);
374330e2	63
	64	typedef unsigned int word32;
	65	typedef unsigned int uint32;
	66
8160fbfc	67	unsigned long crc32(const void *s, size_t len);
374330e2	68
48672163	69	typedef struct {
	70	uint32 h[4];
	71	} MD5_Core_State;
	72
374330e2	73	struct MD5Context {
8f203108	74	#ifdef MSCRYPTOAPI
	75	unsigned long hHash;
	76	#else
48672163	77	MD5_Core_State core;
bb093ca7	78	unsigned char block[64];
48672163	79	int blkused;
48672163	80	uint32 lenhi, lenlo;
8f203108	81	#endif
374330e2	82	};
	83
	84	void MD5Init(struct MD5Context *context);
	85	void MD5Update(struct MD5Context context, unsigned char const buf,
32874aea	86	unsigned len);
374330e2	87	void MD5Final(unsigned char digest[16], struct MD5Context *context);
374330e2	88
e5574168	89	typedef struct {
	90	uint32 h[5];
	91	unsigned char block[64];
	92	int blkused;
	93	uint32 lenhi, lenlo;
	94	} SHA_State;
	95
32874aea	96	void SHA_Init(SHA_State * s);
	97	void SHA_Bytes(SHA_State * s, void *p, int len);
	98	void SHA_Final(SHA_State * s, unsigned char *output);
7cca0d81	99	void SHA_Simple(void p, int len, unsigned char output);
e5574168	100
374330e2	101	struct ssh_cipher {
32874aea	102	void (sesskey) (unsigned char key); /* for ssh 1 */
	103	void (encrypt) (unsigned char blk, int len);
	104	void (decrypt) (unsigned char blk, int len);
0a3f1d48	105	int blksize;
	106	};
	107
	108	struct ssh2_cipher {
32874aea	109	void (setcsiv) (unsigned char key); /* for ssh 2 */
	110	void (setcskey) (unsigned char key); /* for ssh 2 */
	111	void (setsciv) (unsigned char key); /* for ssh 2 */
	112	void (setsckey) (unsigned char key); /* for ssh 2 */
	113	void (encrypt) (unsigned char blk, int len);
	114	void (decrypt) (unsigned char blk, int len);
e5574168	115	char *name;
e5574168	116	int blksize;
d2a0e0be	117	int keylen;
e5574168	118	};
e5574168	119
0a3f1d48	120	struct ssh2_ciphers {
0a3f1d48	121	int nciphers;
65a22376	122	const struct ssh2_cipher const list;
0a3f1d48	123	};
0a3f1d48	124
e5574168	125	struct ssh_mac {
32874aea	126	void (setcskey) (unsigned char key);
	127	void (setsckey) (unsigned char key);
	128	void (generate) (unsigned char blk, int len, unsigned long seq);
	129	int (verify) (unsigned char blk, int len, unsigned long seq);
e5574168	130	char *name;
	131	int len;
	132	};
	133
	134	struct ssh_kex {
7cca0d81	135	/*
	136	* Plugging in another KEX algorithm requires structural chaos,
	137	* so it's hard to abstract them into nice little structures
	138	* like this. Hence, for the moment, this is just a
	139	* placeholder. I claim justification in the fact that OpenSSH
	140	* does this too :-)
	141	*/
e5574168	142	char *name;
	143	};
	144
e055a386	145	struct ssh_signkey {
32874aea	146	void (newkey) (char *data, int len);
	147	void (freekey) (void key);
	148	char (fmtkey) (void *key);
	149	unsigned char (public_blob) (void key, int len);
	150	unsigned char (private_blob) (void key, int len);
	151	void (createkey) (unsigned char *pub_blob, int pub_len,
	152	unsigned char *priv_blob, int priv_len);
	153	void (openssh_createkey) (unsigned char *blob, int len);
	154	int (openssh_fmtkey) (void key, unsigned char *blob, int len);
	155	char (fingerprint) (void *key);
	156	int (verifysig) (void key, char *sig, int siglen,
	157	char *data, int datalen);
	158	unsigned char (sign) (void key, char data, int datalen,
	159	int *siglen);
e5574168	160	char *name;
32874aea	161	char keytype; / for host key cache */
e5574168	162	};
	163
	164	struct ssh_compress {
	165	char *name;
32874aea	166	void (*compress_init) (void);
	167	int (compress) (unsigned char block, int len,
	168	unsigned char *outblock, int outlen);
	169	void (*decompress_init) (void);
	170	int (decompress) (unsigned char block, int len,
	171	unsigned char *outblock, int outlen);
	172	int (*disable_compression) (void);
374330e2	173	};
374330e2	174
65a22376	175	struct ssh2_userkey {
	176	const struct ssh_signkey alg; / the key algorithm */
	177	void data; / the key data */
	178	char comment; / the key comment */
	179	};
	180
	181	extern const struct ssh_cipher ssh_3des;
	182	extern const struct ssh_cipher ssh_des;
	183	extern const struct ssh_cipher ssh_blowfish_ssh1;
	184	extern const struct ssh2_ciphers ssh2_3des;
	185	extern const struct ssh2_ciphers ssh2_aes;
	186	extern const struct ssh2_ciphers ssh2_blowfish;
	187	extern const struct ssh_kex ssh_diffiehellman;
	188	extern const struct ssh_kex ssh_diffiehellman_gex;
	189	extern const struct ssh_signkey ssh_dss;
	190	extern const struct ssh_signkey ssh_rsa;
	191	extern const struct ssh_mac ssh_md5;
	192	extern const struct ssh_mac ssh_sha1;
	193	extern const struct ssh_mac ssh_sha1_buggy;
	194
900a4ee6	195	/*
	196	* PuTTY version number formatted as an SSH version string.
	197	*/
	198	extern char sshver[];
	199
fd5e5847	200	/*
	201	* Gross hack: pscp will try to start SFTP but fall back to scp1 if
	202	* that fails. This variable is the means by which scp.c can reach
	203	* into the SSH code and find out which one it got.
	204	*/
	205	extern int ssh_fallback_cmd;
	206
8f203108	207	#ifndef MSCRYPTOAPI
32874aea	208	void SHATransform(word32 * digest, word32 * data);
8f203108	209	#endif
374330e2	210
	211	int random_byte(void);
	212	void random_add_noise(void *noise, int length);
6e522441	213	void random_add_heavynoise(void *noise, int length);
c5e9c988	214
32874aea	215	void logevent(char *);
d74d141c	216	void *new_sock_channel(Socket s); // allocates and register a new channel for port forwarding
d74d141c	217	void ssh_send_port_open(void channel, char hostname, int port, char *org);
e5574168	218
7cca0d81	219	Bignum copybn(Bignum b);
3709bfe9	220	Bignum bn_power_2(int n);
3709bfe9	221	void bn_restore_invariant(Bignum b);
9400cf6f	222	Bignum bignum_from_short(unsigned short n);
e5574168	223	void freebn(Bignum b);
59600f67	224	Bignum modpow(Bignum base, Bignum exp, Bignum mod);
59600f67	225	Bignum modmul(Bignum a, Bignum b, Bignum mod);
7cca0d81	226	void decbn(Bignum n);
7cca0d81	227	extern Bignum Zero, One;
3709bfe9	228	Bignum bignum_from_bytes(unsigned char *data, int nbytes);
32874aea	229	int ssh1_read_bignum(unsigned char data, Bignum result);
ddecd643	230	int bignum_bitcount(Bignum bn);
5c58ad2d	231	int ssh1_bignum_length(Bignum bn);
260f3dec	232	int ssh2_bignum_length(Bignum bn);
5c58ad2d	233	int bignum_byte(Bignum bn, int i);
9400cf6f	234	int bignum_bit(Bignum bn, int i);
9400cf6f	235	void bignum_set_bit(Bignum bn, int i, int value);
5c58ad2d	236	int ssh1_write_bignum(void *data, Bignum bn);
9400cf6f	237	Bignum biggcd(Bignum a, Bignum b);
	238	unsigned short bignum_mod_short(Bignum number, unsigned short modulus);
	239	Bignum bignum_add_long(Bignum number, unsigned long addend);
	240	Bignum bigmul(Bignum a, Bignum b);
	241	Bignum modinv(Bignum number, Bignum modulus);
3709bfe9	242	Bignum bignum_bitmask(Bignum number);
9400cf6f	243	Bignum bignum_rshift(Bignum number, int shift);
8c3cd914	244	int bignum_cmp(Bignum a, Bignum b);
6e522441	245	char *bignum_decimal(Bignum x);
e5574168	246
3709bfe9	247	void dh_setup_group1(void);
a92dd380	248	void dh_setup_group(Bignum pval, Bignum gval);
3709bfe9	249	void dh_cleanup(void);
7bd5a860	250	Bignum dh_create_e(int nbits);
e5574168	251	Bignum dh_find_K(Bignum f);
7cca0d81	252
65a22376	253	int loadrsakey(char filename, struct RSAKey key, char *passphrase);
a52f067e	254	int rsakey_encrypted(char filename, char *comment);
7cca0d81	255
65a22376	256	int saversakey(char filename, struct RSAKey key, char *passphrase);
	257
	258	void base64_encode_atom(unsigned char data, int n, char out);
	259
	260	/* ssh2_load_userkey can return this as an error */
	261	extern struct ssh2_userkey ssh2_wrong_passphrase;
	262	#define SSH2_WRONG_PASSPHRASE (&ssh2_wrong_passphrase)
	263
	264	int ssh2_userkey_encrypted(char filename, char *comment);
	265	struct ssh2_userkey ssh2_load_userkey(char filename, char *passphrase);
32874aea	266	char ssh2_userkey_loadpub(char filename, char **algorithm,
	267	int *pub_blob_len);
	268	int ssh2_save_userkey(char filename, struct ssh2_userkey key,
	269	char *passphrase);
65a22376	270
65a22376	271	int keyfile_version(char *filename);
6e522441	272
65a22376	273	void des3_decrypt_pubkey(unsigned char key, unsigned char blk, int len);
65a22376	274	void des3_encrypt_pubkey(unsigned char key, unsigned char blk, int len);
32874aea	275	void aes256_encrypt_pubkey(unsigned char key, unsigned char blk,
	276	int len);
	277	void aes256_decrypt_pubkey(unsigned char key, unsigned char blk,
	278	int len);
9400cf6f	279
	280	/*
	281	* For progress updates in the key generation utility.
	282	*/
32874aea	283	typedef void (progfn_t) (void param, int phase, int progress);
9400cf6f	284
32874aea	285	int rsa_generate(struct RSAKey *key, int bits, progfn_t pfn,
	286	void *pfnparam);
	287	Bignum primegen(int bits, int modulus, int residue, int phase,
	288	progfn_t pfn, void *pfnparam);
4ba9b64b	289
d74d141c	290
4ba9b64b	291	/*
	292	* zlib compression.
	293	*/
	294	void zlib_compress_init(void);
	295	void zlib_decompress_init(void);
	296	int zlib_compress_block(unsigned char *block, int len,
	297	unsigned char *outblock, int outlen);
	298	int zlib_decompress_block(unsigned char *block, int len,
	299	unsigned char *outblock, int outlen);
1983e559	300
	301	/*
	302	* SSH1 agent messages.
	303	*/
	304	#define SSH1_AGENTC_REQUEST_RSA_IDENTITIES 1
	305	#define SSH1_AGENT_RSA_IDENTITIES_ANSWER 2
	306	#define SSH1_AGENTC_RSA_CHALLENGE 3
	307	#define SSH1_AGENT_RSA_RESPONSE 4
	308	#define SSH1_AGENTC_ADD_RSA_IDENTITY 7
	309	#define SSH1_AGENTC_REMOVE_RSA_IDENTITY 8
32874aea	310	#define SSH1_AGENTC_REMOVE_ALL_RSA_IDENTITIES 9 /* openssh private? */
1983e559	311
	312	/*
	313	* Messages common to SSH1 and OpenSSH's SSH2.
	314	*/
	315	#define SSH_AGENT_FAILURE 5
	316	#define SSH_AGENT_SUCCESS 6
	317
	318	/*
	319	* OpenSSH's SSH2 agent messages.
	320	*/
	321	#define SSH2_AGENTC_REQUEST_IDENTITIES 11
	322	#define SSH2_AGENT_IDENTITIES_ANSWER 12
	323	#define SSH2_AGENTC_SIGN_REQUEST 13
	324	#define SSH2_AGENT_SIGN_RESPONSE 14
	325	#define SSH2_AGENTC_ADD_IDENTITY 17
	326	#define SSH2_AGENTC_REMOVE_IDENTITY 18
	327	#define SSH2_AGENTC_REMOVE_ALL_IDENTITIES 19