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1 | #include <string.h> |
2 | |
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3 | /* |
4 | * Useful thing. |
5 | */ |
6 | #ifndef lenof |
7 | #define lenof(x) ( (sizeof((x))) / (sizeof(*(x)))) |
8 | #endif |
9 | |
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10 | #define SSH_CIPHER_IDEA 1 |
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11 | #define SSH_CIPHER_DES 2 |
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12 | #define SSH_CIPHER_3DES 3 |
13 | #define SSH_CIPHER_BLOWFISH 6 |
14 | |
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15 | #ifdef MSCRYPTOAPI |
16 | #define APIEXTRA 8 |
17 | #else |
18 | #define APIEXTRA 0 |
19 | #endif |
20 | |
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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 | |
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28 | struct RSAKey { |
29 | int bits; |
30 | int bytes; |
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31 | #ifdef MSCRYPTOAPI |
32 | unsigned long exponent; |
33 | unsigned char *modulus; |
34 | #else |
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35 | Bignum modulus; |
36 | Bignum exponent; |
37 | Bignum private_exponent; |
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38 | #endif |
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39 | char *comment; |
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40 | }; |
41 | |
42 | int makekey(unsigned char *data, struct RSAKey *result, |
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43 | unsigned char **keystr, int order); |
44 | int makeprivate(unsigned char *data, struct RSAKey *result); |
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45 | void rsaencrypt(unsigned char *data, int length, struct RSAKey *key); |
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46 | Bignum rsadecrypt(Bignum input, struct RSAKey *key); |
47 | void rsasign(unsigned char *data, int length, struct RSAKey *key); |
48 | void rsasanitise(struct RSAKey *key); |
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49 | int rsastr_len(struct RSAKey *key); |
50 | void rsastr_fmt(char *str, struct RSAKey *key); |
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51 | void freersakey(struct RSAKey *key); |
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52 | |
53 | typedef unsigned int word32; |
54 | typedef unsigned int uint32; |
55 | |
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56 | unsigned long crc32(const void *s, size_t len); |
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57 | |
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58 | typedef struct { |
59 | uint32 h[4]; |
60 | } MD5_Core_State; |
61 | |
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62 | struct MD5Context { |
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63 | #ifdef MSCRYPTOAPI |
64 | unsigned long hHash; |
65 | #else |
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66 | MD5_Core_State core; |
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67 | unsigned char block[64]; |
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68 | int blkused; |
69 | uint32 lenhi, lenlo; |
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70 | #endif |
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71 | }; |
72 | |
73 | void MD5Init(struct MD5Context *context); |
74 | void MD5Update(struct MD5Context *context, unsigned char const *buf, |
75 | unsigned len); |
76 | void MD5Final(unsigned char digest[16], struct MD5Context *context); |
77 | |
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78 | typedef struct { |
79 | uint32 h[5]; |
80 | unsigned char block[64]; |
81 | int blkused; |
82 | uint32 lenhi, lenlo; |
83 | } SHA_State; |
84 | |
85 | void SHA_Init(SHA_State *s); |
86 | void SHA_Bytes(SHA_State *s, void *p, int len); |
87 | void SHA_Final(SHA_State *s, unsigned char *output); |
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88 | void SHA_Simple(void *p, int len, unsigned char *output); |
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89 | |
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90 | struct ssh_cipher { |
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91 | void (*sesskey)(unsigned char *key); /* for ssh 1 */ |
92 | void (*setcsiv)(unsigned char *key); /* for ssh 2 */ |
93 | void (*setcskey)(unsigned char *key); /* for ssh 2 */ |
94 | void (*setsciv)(unsigned char *key); /* for ssh 2 */ |
95 | void (*setsckey)(unsigned char *key); /* for ssh 2 */ |
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96 | void (*encrypt)(unsigned char *blk, int len); |
97 | void (*decrypt)(unsigned char *blk, int len); |
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98 | char *name; |
99 | int blksize; |
100 | }; |
101 | |
102 | struct ssh_mac { |
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103 | void (*setcskey)(unsigned char *key); |
104 | void (*setsckey)(unsigned char *key); |
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105 | void (*generate)(unsigned char *blk, int len, unsigned long seq); |
106 | int (*verify)(unsigned char *blk, int len, unsigned long seq); |
107 | char *name; |
108 | int len; |
109 | }; |
110 | |
111 | struct ssh_kex { |
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112 | /* |
113 | * Plugging in another KEX algorithm requires structural chaos, |
114 | * so it's hard to abstract them into nice little structures |
115 | * like this. Hence, for the moment, this is just a |
116 | * placeholder. I claim justification in the fact that OpenSSH |
117 | * does this too :-) |
118 | */ |
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119 | char *name; |
120 | }; |
121 | |
122 | struct ssh_hostkey { |
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123 | void (*setkey)(char *data, int len); |
124 | char *(*fmtkey)(void); |
125 | int (*verifysig)(char *sig, int siglen, char *data, int datalen); |
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126 | char *name; |
127 | }; |
128 | |
129 | struct ssh_compress { |
130 | char *name; |
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131 | }; |
132 | |
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133 | #ifndef MSCRYPTOAPI |
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134 | void SHATransform(word32 *digest, word32 *data); |
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135 | #endif |
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136 | |
137 | int random_byte(void); |
138 | void random_add_noise(void *noise, int length); |
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139 | |
140 | void logevent (char *); |
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141 | |
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142 | Bignum newbn(int length); |
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143 | Bignum copybn(Bignum b); |
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144 | void freebn(Bignum b); |
145 | void modpow(Bignum base, Bignum exp, Bignum mod, Bignum result); |
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146 | void modmul(Bignum a, Bignum b, Bignum mod, Bignum result); |
147 | void decbn(Bignum n); |
148 | extern Bignum Zero, One; |
149 | int ssh1_read_bignum(unsigned char *data, Bignum *result); |
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150 | int ssh1_bignum_bitcount(Bignum bn); |
151 | int ssh1_bignum_length(Bignum bn); |
152 | int bignum_byte(Bignum bn, int i); |
153 | int ssh1_write_bignum(void *data, Bignum bn); |
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154 | |
155 | Bignum dh_create_e(void); |
156 | Bignum dh_find_K(Bignum f); |
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157 | |
158 | int loadrsakey(char *filename, struct RSAKey *key, char *passphrase); |
159 | int rsakey_encrypted(char *filename); |
160 | |
161 | void des3_decrypt_pubkey(unsigned char *key, |
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162 | unsigned char *blk, int len); |