9 #define lenof(x) ( (sizeof((x))) / (sizeof(*(x))))
12 #define SSH_CIPHER_IDEA 1
13 #define SSH_CIPHER_DES 2
14 #define SSH_CIPHER_3DES 3
15 #define SSH_CIPHER_BLOWFISH 6
23 #ifndef BIGNUM_INTERNAL
31 unsigned long exponent
;
32 unsigned char *modulus
;
36 Bignum private_exponent
;
44 int makekey(unsigned char *data
, struct RSAKey
*result
,
45 unsigned char **keystr
, int order
);
46 int makeprivate(unsigned char *data
, struct RSAKey
*result
);
47 void rsaencrypt(unsigned char *data
, int length
, struct RSAKey
*key
);
48 Bignum
rsadecrypt(Bignum input
, struct RSAKey
*key
);
49 void rsasign(unsigned char *data
, int length
, struct RSAKey
*key
);
50 void rsasanitise(struct RSAKey
*key
);
51 int rsastr_len(struct RSAKey
*key
);
52 void rsastr_fmt(char *str
, struct RSAKey
*key
);
53 void rsa_fingerprint(char *str
, int len
, struct RSAKey
*key
);
54 void freersakey(struct RSAKey
*key
);
56 typedef unsigned int word32
;
57 typedef unsigned int uint32
;
59 unsigned long crc32(const void *s
, size_t len
);
70 unsigned char block
[64];
76 void MD5Init(struct MD5Context
*context
);
77 void MD5Update(struct MD5Context
*context
, unsigned char const *buf
,
79 void MD5Final(unsigned char digest
[16], struct MD5Context
*context
);
83 unsigned char block
[64];
88 void SHA_Init(SHA_State
*s
);
89 void SHA_Bytes(SHA_State
*s
, void *p
, int len
);
90 void SHA_Final(SHA_State
*s
, unsigned char *output
);
91 void SHA_Simple(void *p
, int len
, unsigned char *output
);
94 void (*sesskey
)(unsigned char *key
); /* for ssh 1 */
95 void (*encrypt
)(unsigned char *blk
, int len
);
96 void (*decrypt
)(unsigned char *blk
, int len
);
101 void (*setcsiv
)(unsigned char *key
); /* for ssh 2 */
102 void (*setcskey
)(unsigned char *key
); /* for ssh 2 */
103 void (*setsciv
)(unsigned char *key
); /* for ssh 2 */
104 void (*setsckey
)(unsigned char *key
); /* for ssh 2 */
105 void (*encrypt
)(unsigned char *blk
, int len
);
106 void (*decrypt
)(unsigned char *blk
, int len
);
112 struct ssh2_ciphers
{
114 const struct ssh2_cipher
*const *list
;
118 void (*setcskey
)(unsigned char *key
);
119 void (*setsckey
)(unsigned char *key
);
120 void (*generate
)(unsigned char *blk
, int len
, unsigned long seq
);
121 int (*verify
)(unsigned char *blk
, int len
, unsigned long seq
);
128 * Plugging in another KEX algorithm requires structural chaos,
129 * so it's hard to abstract them into nice little structures
130 * like this. Hence, for the moment, this is just a
131 * placeholder. I claim justification in the fact that OpenSSH
138 void *(*newkey
)(char *data
, int len
);
139 void (*freekey
)(void *key
);
140 char *(*fmtkey
)(void *key
);
141 unsigned char *(*public_blob
)(void *key
, int *len
);
142 unsigned char *(*private_blob
)(void *key
, int *len
);
143 void *(*createkey
)(unsigned char *pub_blob
, int pub_len
,
144 unsigned char *priv_blob
, int priv_len
);
145 void *(*openssh_createkey
)(unsigned char **blob
, int *len
);
146 char *(*fingerprint
)(void *key
);
147 int (*verifysig
)(void *key
, char *sig
, int siglen
,
148 char *data
, int datalen
);
149 unsigned char *(*sign
)(void *key
, char *data
, int datalen
, int *siglen
);
151 char *keytype
; /* for host key cache */
154 struct ssh_compress
{
156 void (*compress_init
)(void);
157 int (*compress
)(unsigned char *block
, int len
,
158 unsigned char **outblock
, int *outlen
);
159 void (*decompress_init
)(void);
160 int (*decompress
)(unsigned char *block
, int len
,
161 unsigned char **outblock
, int *outlen
);
162 int (*disable_compression
)(void);
165 struct ssh2_userkey
{
166 const struct ssh_signkey
*alg
; /* the key algorithm */
167 void *data
; /* the key data */
168 char *comment
; /* the key comment */
171 extern const struct ssh_cipher ssh_3des
;
172 extern const struct ssh_cipher ssh_des
;
173 extern const struct ssh_cipher ssh_blowfish_ssh1
;
174 extern const struct ssh2_ciphers ssh2_3des
;
175 extern const struct ssh2_ciphers ssh2_aes
;
176 extern const struct ssh2_ciphers ssh2_blowfish
;
177 extern const struct ssh_kex ssh_diffiehellman
;
178 extern const struct ssh_kex ssh_diffiehellman_gex
;
179 extern const struct ssh_signkey ssh_dss
;
180 extern const struct ssh_signkey ssh_rsa
;
181 extern const struct ssh_mac ssh_md5
;
182 extern const struct ssh_mac ssh_sha1
;
183 extern const struct ssh_mac ssh_sha1_buggy
;
186 void SHATransform(word32
*digest
, word32
*data
);
189 int random_byte(void);
190 void random_add_noise(void *noise
, int length
);
191 void random_add_heavynoise(void *noise
, int length
);
193 void logevent (char *);
195 Bignum
copybn(Bignum b
);
196 Bignum
bn_power_2(int n
);
197 void bn_restore_invariant(Bignum b
);
198 Bignum
bignum_from_short(unsigned short n
);
199 void freebn(Bignum b
);
200 Bignum
modpow(Bignum base
, Bignum exp
, Bignum mod
);
201 Bignum
modmul(Bignum a
, Bignum b
, Bignum mod
);
202 void decbn(Bignum n
);
203 extern Bignum Zero
, One
;
204 Bignum
bignum_from_bytes(unsigned char *data
, int nbytes
);
205 int ssh1_read_bignum(unsigned char *data
, Bignum
*result
);
206 int ssh1_bignum_bitcount(Bignum bn
);
207 int ssh1_bignum_length(Bignum bn
);
208 int bignum_byte(Bignum bn
, int i
);
209 int bignum_bit(Bignum bn
, int i
);
210 void bignum_set_bit(Bignum bn
, int i
, int value
);
211 int ssh1_write_bignum(void *data
, Bignum bn
);
212 Bignum
biggcd(Bignum a
, Bignum b
);
213 unsigned short bignum_mod_short(Bignum number
, unsigned short modulus
);
214 Bignum
bignum_add_long(Bignum number
, unsigned long addend
);
215 Bignum
bigmul(Bignum a
, Bignum b
);
216 Bignum
modinv(Bignum number
, Bignum modulus
);
217 Bignum
bignum_bitmask(Bignum number
);
218 Bignum
bignum_rshift(Bignum number
, int shift
);
219 int bignum_cmp(Bignum a
, Bignum b
);
220 char *bignum_decimal(Bignum x
);
222 void dh_setup_group1(void);
223 void dh_setup_group(Bignum pval
, Bignum gval
);
224 void dh_cleanup(void);
225 Bignum
dh_create_e(int nbits
);
226 Bignum
dh_find_K(Bignum f
);
228 int loadrsakey(char *filename
, struct RSAKey
*key
, char *passphrase
);
229 int rsakey_encrypted(char *filename
, char **comment
);
231 int saversakey(char *filename
, struct RSAKey
*key
, char *passphrase
);
233 void base64_encode_atom(unsigned char *data
, int n
, char *out
);
235 /* ssh2_load_userkey can return this as an error */
236 extern struct ssh2_userkey ssh2_wrong_passphrase
;
237 #define SSH2_WRONG_PASSPHRASE (&ssh2_wrong_passphrase)
239 int ssh2_userkey_encrypted(char *filename
, char **comment
);
240 struct ssh2_userkey
*ssh2_load_userkey(char *filename
, char *passphrase
);
241 char *ssh2_userkey_loadpub(char *filename
, char **algorithm
, int *pub_blob_len
);
242 int ssh2_save_userkey(char *filename
, struct ssh2_userkey
*key
, char *passphrase
);
244 int keyfile_version(char *filename
);
246 void des3_decrypt_pubkey(unsigned char *key
, unsigned char *blk
, int len
);
247 void des3_encrypt_pubkey(unsigned char *key
, unsigned char *blk
, int len
);
248 void aes256_encrypt_pubkey(unsigned char *key
, unsigned char *blk
, int len
);
249 void aes256_decrypt_pubkey(unsigned char *key
, unsigned char *blk
, int len
);
252 * For progress updates in the key generation utility.
254 typedef void (*progfn_t
)(void *param
, int phase
, int progress
);
256 int rsa_generate(struct RSAKey
*key
, int bits
, progfn_t pfn
, void *pfnparam
);
257 Bignum
primegen(int bits
, int modulus
, int residue
,
258 int phase
, progfn_t pfn
, void *pfnparam
);
263 void zlib_compress_init(void);
264 void zlib_decompress_init(void);
265 int zlib_compress_block(unsigned char *block
, int len
,
266 unsigned char **outblock
, int *outlen
);
267 int zlib_decompress_block(unsigned char *block
, int len
,
268 unsigned char **outblock
, int *outlen
);
271 * SSH1 agent messages.
273 #define SSH1_AGENTC_REQUEST_RSA_IDENTITIES 1
274 #define SSH1_AGENT_RSA_IDENTITIES_ANSWER 2
275 #define SSH1_AGENTC_RSA_CHALLENGE 3
276 #define SSH1_AGENT_RSA_RESPONSE 4
277 #define SSH1_AGENTC_ADD_RSA_IDENTITY 7
278 #define SSH1_AGENTC_REMOVE_RSA_IDENTITY 8
279 #define SSH1_AGENTC_REMOVE_ALL_RSA_IDENTITIES 9 /* openssh private? */
282 * Messages common to SSH1 and OpenSSH's SSH2.
284 #define SSH_AGENT_FAILURE 5
285 #define SSH_AGENT_SUCCESS 6
288 * OpenSSH's SSH2 agent messages.
290 #define SSH2_AGENTC_REQUEST_IDENTITIES 11
291 #define SSH2_AGENT_IDENTITIES_ANSWER 12
292 #define SSH2_AGENTC_SIGN_REQUEST 13
293 #define SSH2_AGENT_SIGN_RESPONSE 14
294 #define SSH2_AGENTC_ADD_IDENTITY 17
295 #define SSH2_AGENTC_REMOVE_IDENTITY 18
296 #define SSH2_AGENTC_REMOVE_ALL_IDENTITIES 19