37508af4 |
1 | #include <string.h> |
2 | |
e5574168 |
3 | /* |
4 | * Useful thing. |
5 | */ |
6 | #ifndef lenof |
7 | #define lenof(x) ( (sizeof((x))) / (sizeof(*(x)))) |
8 | #endif |
9 | |
bea1ef5f |
10 | #define SSH_CIPHER_IDEA 1 |
9697bfd2 |
11 | #define SSH_CIPHER_DES 2 |
bea1ef5f |
12 | #define SSH_CIPHER_3DES 3 |
13 | #define SSH_CIPHER_BLOWFISH 6 |
14 | |
e5574168 |
15 | #ifdef MSCRYPTOAPI |
16 | #define APIEXTRA 8 |
17 | #else |
18 | #define APIEXTRA 0 |
19 | #endif |
20 | |
7cca0d81 |
21 | /* |
22 | * A Bignum is stored as a sequence of `unsigned short' words. The |
23 | * first tells how many remain; the remaining ones are digits, LS |
24 | * first. |
25 | */ |
26 | typedef unsigned short *Bignum; |
27 | |
374330e2 |
28 | struct RSAKey { |
29 | int bits; |
30 | int bytes; |
8f203108 |
31 | #ifdef MSCRYPTOAPI |
32 | unsigned long exponent; |
33 | unsigned char *modulus; |
34 | #else |
7cca0d81 |
35 | Bignum modulus; |
36 | Bignum exponent; |
37 | Bignum private_exponent; |
8f203108 |
38 | #endif |
5c58ad2d |
39 | char *comment; |
374330e2 |
40 | }; |
41 | |
9400cf6f |
42 | struct RSAAux { |
43 | Bignum p; |
44 | Bignum q; |
45 | Bignum iqmp; |
46 | }; |
47 | |
374330e2 |
48 | int makekey(unsigned char *data, struct RSAKey *result, |
7cca0d81 |
49 | unsigned char **keystr, int order); |
50 | int makeprivate(unsigned char *data, struct RSAKey *result); |
374330e2 |
51 | void rsaencrypt(unsigned char *data, int length, struct RSAKey *key); |
7cca0d81 |
52 | Bignum rsadecrypt(Bignum input, struct RSAKey *key); |
53 | void rsasign(unsigned char *data, int length, struct RSAKey *key); |
54 | void rsasanitise(struct RSAKey *key); |
374330e2 |
55 | int rsastr_len(struct RSAKey *key); |
56 | void rsastr_fmt(char *str, struct RSAKey *key); |
1c2a93c4 |
57 | void rsa_fingerprint(char *str, int len, struct RSAKey *key); |
5c58ad2d |
58 | void freersakey(struct RSAKey *key); |
374330e2 |
59 | |
60 | typedef unsigned int word32; |
61 | typedef unsigned int uint32; |
62 | |
8160fbfc |
63 | unsigned long crc32(const void *s, size_t len); |
374330e2 |
64 | |
48672163 |
65 | typedef struct { |
66 | uint32 h[4]; |
67 | } MD5_Core_State; |
68 | |
374330e2 |
69 | struct MD5Context { |
8f203108 |
70 | #ifdef MSCRYPTOAPI |
71 | unsigned long hHash; |
72 | #else |
48672163 |
73 | MD5_Core_State core; |
bb093ca7 |
74 | unsigned char block[64]; |
48672163 |
75 | int blkused; |
76 | uint32 lenhi, lenlo; |
8f203108 |
77 | #endif |
374330e2 |
78 | }; |
79 | |
80 | void MD5Init(struct MD5Context *context); |
81 | void MD5Update(struct MD5Context *context, unsigned char const *buf, |
82 | unsigned len); |
83 | void MD5Final(unsigned char digest[16], struct MD5Context *context); |
84 | |
e5574168 |
85 | typedef struct { |
86 | uint32 h[5]; |
87 | unsigned char block[64]; |
88 | int blkused; |
89 | uint32 lenhi, lenlo; |
90 | } SHA_State; |
91 | |
92 | void SHA_Init(SHA_State *s); |
93 | void SHA_Bytes(SHA_State *s, void *p, int len); |
94 | void SHA_Final(SHA_State *s, unsigned char *output); |
7cca0d81 |
95 | void SHA_Simple(void *p, int len, unsigned char *output); |
e5574168 |
96 | |
374330e2 |
97 | struct ssh_cipher { |
d39f364a |
98 | void (*sesskey)(unsigned char *key); /* for ssh 1 */ |
99 | void (*setcsiv)(unsigned char *key); /* for ssh 2 */ |
100 | void (*setcskey)(unsigned char *key); /* for ssh 2 */ |
101 | void (*setsciv)(unsigned char *key); /* for ssh 2 */ |
102 | void (*setsckey)(unsigned char *key); /* for ssh 2 */ |
374330e2 |
103 | void (*encrypt)(unsigned char *blk, int len); |
104 | void (*decrypt)(unsigned char *blk, int len); |
e5574168 |
105 | char *name; |
106 | int blksize; |
107 | }; |
108 | |
109 | struct ssh_mac { |
d39f364a |
110 | void (*setcskey)(unsigned char *key); |
111 | void (*setsckey)(unsigned char *key); |
e5574168 |
112 | void (*generate)(unsigned char *blk, int len, unsigned long seq); |
113 | int (*verify)(unsigned char *blk, int len, unsigned long seq); |
114 | char *name; |
115 | int len; |
116 | }; |
117 | |
118 | struct ssh_kex { |
7cca0d81 |
119 | /* |
120 | * Plugging in another KEX algorithm requires structural chaos, |
121 | * so it's hard to abstract them into nice little structures |
122 | * like this. Hence, for the moment, this is just a |
123 | * placeholder. I claim justification in the fact that OpenSSH |
124 | * does this too :-) |
125 | */ |
e5574168 |
126 | char *name; |
127 | }; |
128 | |
129 | struct ssh_hostkey { |
7cca0d81 |
130 | void (*setkey)(char *data, int len); |
131 | char *(*fmtkey)(void); |
d5859615 |
132 | char *(*fingerprint)(void); |
7cca0d81 |
133 | int (*verifysig)(char *sig, int siglen, char *data, int datalen); |
e5574168 |
134 | char *name; |
d5859615 |
135 | char *keytype; /* for host key cache */ |
e5574168 |
136 | }; |
137 | |
138 | struct ssh_compress { |
139 | char *name; |
374330e2 |
140 | }; |
141 | |
8f203108 |
142 | #ifndef MSCRYPTOAPI |
374330e2 |
143 | void SHATransform(word32 *digest, word32 *data); |
8f203108 |
144 | #endif |
374330e2 |
145 | |
146 | int random_byte(void); |
147 | void random_add_noise(void *noise, int length); |
6e522441 |
148 | void random_add_heavynoise(void *noise, int length); |
c5e9c988 |
149 | |
150 | void logevent (char *); |
e5574168 |
151 | |
e5574168 |
152 | Bignum newbn(int length); |
7cca0d81 |
153 | Bignum copybn(Bignum b); |
9400cf6f |
154 | Bignum bignum_from_short(unsigned short n); |
e5574168 |
155 | void freebn(Bignum b); |
156 | void modpow(Bignum base, Bignum exp, Bignum mod, Bignum result); |
7cca0d81 |
157 | void modmul(Bignum a, Bignum b, Bignum mod, Bignum result); |
158 | void decbn(Bignum n); |
159 | extern Bignum Zero, One; |
160 | int ssh1_read_bignum(unsigned char *data, Bignum *result); |
5c58ad2d |
161 | int ssh1_bignum_bitcount(Bignum bn); |
162 | int ssh1_bignum_length(Bignum bn); |
163 | int bignum_byte(Bignum bn, int i); |
9400cf6f |
164 | int bignum_bit(Bignum bn, int i); |
165 | void bignum_set_bit(Bignum bn, int i, int value); |
5c58ad2d |
166 | int ssh1_write_bignum(void *data, Bignum bn); |
9400cf6f |
167 | Bignum biggcd(Bignum a, Bignum b); |
168 | unsigned short bignum_mod_short(Bignum number, unsigned short modulus); |
169 | Bignum bignum_add_long(Bignum number, unsigned long addend); |
170 | Bignum bigmul(Bignum a, Bignum b); |
171 | Bignum modinv(Bignum number, Bignum modulus); |
172 | Bignum bignum_rshift(Bignum number, int shift); |
8c3cd914 |
173 | int bignum_cmp(Bignum a, Bignum b); |
6e522441 |
174 | char *bignum_decimal(Bignum x); |
e5574168 |
175 | |
176 | Bignum dh_create_e(void); |
177 | Bignum dh_find_K(Bignum f); |
7cca0d81 |
178 | |
6e522441 |
179 | int loadrsakey(char *filename, struct RSAKey *key, struct RSAAux *aux, |
180 | char *passphrase); |
a52f067e |
181 | int rsakey_encrypted(char *filename, char **comment); |
7cca0d81 |
182 | |
6e522441 |
183 | int saversakey(char *filename, struct RSAKey *key, struct RSAAux *aux, |
184 | char *passphrase); |
185 | |
7cca0d81 |
186 | void des3_decrypt_pubkey(unsigned char *key, |
5c58ad2d |
187 | unsigned char *blk, int len); |
6e522441 |
188 | void des3_encrypt_pubkey(unsigned char *key, |
189 | unsigned char *blk, int len); |
9400cf6f |
190 | |
191 | /* |
192 | * For progress updates in the key generation utility. |
193 | */ |
194 | typedef void (*progfn_t)(void *param, int phase, int progress); |
195 | |
196 | int rsa_generate(struct RSAKey *key, struct RSAAux *aux, int bits, |
197 | progfn_t pfn, void *pfnparam); |
198 | Bignum primegen(int bits, int modulus, int residue, |
199 | int phase, progfn_t pfn, void *pfnparam); |