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1 | #include <string.h> |
2 | |
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3 | #include "puttymem.h" |
4 | |
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5 | /* |
6 | * Useful thing. |
7 | */ |
8 | #ifndef lenof |
9 | #define lenof(x) ( (sizeof((x))) / (sizeof(*(x)))) |
10 | #endif |
11 | |
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12 | #define SSH_CIPHER_IDEA 1 |
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13 | #define SSH_CIPHER_DES 2 |
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14 | #define SSH_CIPHER_3DES 3 |
15 | #define SSH_CIPHER_BLOWFISH 6 |
16 | |
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17 | #ifdef MSCRYPTOAPI |
18 | #define APIEXTRA 8 |
19 | #else |
20 | #define APIEXTRA 0 |
21 | #endif |
22 | |
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23 | /* |
24 | * A Bignum is stored as a sequence of `unsigned short' words. The |
25 | * first tells how many remain; the remaining ones are digits, LS |
26 | * first. |
27 | */ |
28 | typedef unsigned short *Bignum; |
29 | |
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30 | struct RSAKey { |
31 | int bits; |
32 | int bytes; |
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33 | #ifdef MSCRYPTOAPI |
34 | unsigned long exponent; |
35 | unsigned char *modulus; |
36 | #else |
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37 | Bignum modulus; |
38 | Bignum exponent; |
39 | Bignum private_exponent; |
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40 | #endif |
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41 | char *comment; |
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42 | }; |
43 | |
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44 | struct RSAAux { |
45 | Bignum p; |
46 | Bignum q; |
47 | Bignum iqmp; |
48 | }; |
49 | |
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50 | int makekey(unsigned char *data, struct RSAKey *result, |
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51 | unsigned char **keystr, int order); |
52 | int makeprivate(unsigned char *data, struct RSAKey *result); |
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53 | void rsaencrypt(unsigned char *data, int length, struct RSAKey *key); |
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54 | Bignum rsadecrypt(Bignum input, struct RSAKey *key); |
55 | void rsasign(unsigned char *data, int length, struct RSAKey *key); |
56 | void rsasanitise(struct RSAKey *key); |
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57 | int rsastr_len(struct RSAKey *key); |
58 | void rsastr_fmt(char *str, struct RSAKey *key); |
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59 | void rsa_fingerprint(char *str, int len, struct RSAKey *key); |
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60 | void freersakey(struct RSAKey *key); |
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61 | |
62 | typedef unsigned int word32; |
63 | typedef unsigned int uint32; |
64 | |
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65 | unsigned long crc32(const void *s, size_t len); |
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66 | |
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67 | typedef struct { |
68 | uint32 h[4]; |
69 | } MD5_Core_State; |
70 | |
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71 | struct MD5Context { |
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72 | #ifdef MSCRYPTOAPI |
73 | unsigned long hHash; |
74 | #else |
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75 | MD5_Core_State core; |
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76 | unsigned char block[64]; |
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77 | int blkused; |
78 | uint32 lenhi, lenlo; |
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79 | #endif |
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80 | }; |
81 | |
82 | void MD5Init(struct MD5Context *context); |
83 | void MD5Update(struct MD5Context *context, unsigned char const *buf, |
84 | unsigned len); |
85 | void MD5Final(unsigned char digest[16], struct MD5Context *context); |
86 | |
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87 | typedef struct { |
88 | uint32 h[5]; |
89 | unsigned char block[64]; |
90 | int blkused; |
91 | uint32 lenhi, lenlo; |
92 | } SHA_State; |
93 | |
94 | void SHA_Init(SHA_State *s); |
95 | void SHA_Bytes(SHA_State *s, void *p, int len); |
96 | void SHA_Final(SHA_State *s, unsigned char *output); |
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97 | void SHA_Simple(void *p, int len, unsigned char *output); |
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98 | |
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99 | struct ssh_cipher { |
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100 | void (*sesskey)(unsigned char *key); /* for ssh 1 */ |
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 */ |
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105 | void (*encrypt)(unsigned char *blk, int len); |
106 | void (*decrypt)(unsigned char *blk, int len); |
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107 | char *name; |
108 | int blksize; |
109 | }; |
110 | |
111 | struct ssh_mac { |
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112 | void (*setcskey)(unsigned char *key); |
113 | void (*setsckey)(unsigned char *key); |
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114 | void (*generate)(unsigned char *blk, int len, unsigned long seq); |
115 | int (*verify)(unsigned char *blk, int len, unsigned long seq); |
116 | char *name; |
117 | int len; |
118 | }; |
119 | |
120 | struct ssh_kex { |
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121 | /* |
122 | * Plugging in another KEX algorithm requires structural chaos, |
123 | * so it's hard to abstract them into nice little structures |
124 | * like this. Hence, for the moment, this is just a |
125 | * placeholder. I claim justification in the fact that OpenSSH |
126 | * does this too :-) |
127 | */ |
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128 | char *name; |
129 | }; |
130 | |
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131 | struct ssh_signkey { |
132 | void *(*newkey)(char *data, int len); |
133 | void (*freekey)(void *key); |
134 | char *(*fmtkey)(void *key); |
135 | char *(*fingerprint)(void *key); |
136 | int (*verifysig)(void *key, char *sig, int siglen, |
137 | char *data, int datalen); |
138 | int (*sign)(void *key, char *sig, int siglen, |
139 | char *data, int datalen); |
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140 | char *name; |
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141 | char *keytype; /* for host key cache */ |
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142 | }; |
143 | |
144 | struct ssh_compress { |
145 | char *name; |
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146 | void (*compress_init)(void); |
147 | int (*compress)(unsigned char *block, int len, |
148 | unsigned char **outblock, int *outlen); |
149 | void (*decompress_init)(void); |
150 | int (*decompress)(unsigned char *block, int len, |
151 | unsigned char **outblock, int *outlen); |
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152 | }; |
153 | |
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154 | #ifndef MSCRYPTOAPI |
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155 | void SHATransform(word32 *digest, word32 *data); |
8f203108 |
156 | #endif |
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157 | |
158 | int random_byte(void); |
159 | void random_add_noise(void *noise, int length); |
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160 | void random_add_heavynoise(void *noise, int length); |
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161 | |
162 | void logevent (char *); |
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163 | |
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164 | Bignum newbn(int length); |
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165 | Bignum copybn(Bignum b); |
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166 | Bignum bignum_from_short(unsigned short n); |
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167 | void freebn(Bignum b); |
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168 | Bignum modpow(Bignum base, Bignum exp, Bignum mod); |
169 | Bignum modmul(Bignum a, Bignum b, Bignum mod); |
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170 | void decbn(Bignum n); |
171 | extern Bignum Zero, One; |
172 | int ssh1_read_bignum(unsigned char *data, Bignum *result); |
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173 | int ssh1_bignum_bitcount(Bignum bn); |
174 | int ssh1_bignum_length(Bignum bn); |
175 | int bignum_byte(Bignum bn, int i); |
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176 | int bignum_bit(Bignum bn, int i); |
177 | void bignum_set_bit(Bignum bn, int i, int value); |
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178 | int ssh1_write_bignum(void *data, Bignum bn); |
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179 | Bignum biggcd(Bignum a, Bignum b); |
180 | unsigned short bignum_mod_short(Bignum number, unsigned short modulus); |
181 | Bignum bignum_add_long(Bignum number, unsigned long addend); |
182 | Bignum bigmul(Bignum a, Bignum b); |
183 | Bignum modinv(Bignum number, Bignum modulus); |
184 | Bignum bignum_rshift(Bignum number, int shift); |
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185 | int bignum_cmp(Bignum a, Bignum b); |
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186 | char *bignum_decimal(Bignum x); |
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187 | |
188 | Bignum dh_create_e(void); |
189 | Bignum dh_find_K(Bignum f); |
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190 | |
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191 | int loadrsakey(char *filename, struct RSAKey *key, struct RSAAux *aux, |
192 | char *passphrase); |
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193 | int rsakey_encrypted(char *filename, char **comment); |
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194 | |
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195 | int saversakey(char *filename, struct RSAKey *key, struct RSAAux *aux, |
196 | char *passphrase); |
197 | |
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198 | void des3_decrypt_pubkey(unsigned char *key, |
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199 | unsigned char *blk, int len); |
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200 | void des3_encrypt_pubkey(unsigned char *key, |
201 | unsigned char *blk, int len); |
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202 | |
203 | /* |
204 | * For progress updates in the key generation utility. |
205 | */ |
206 | typedef void (*progfn_t)(void *param, int phase, int progress); |
207 | |
208 | int rsa_generate(struct RSAKey *key, struct RSAAux *aux, int bits, |
209 | progfn_t pfn, void *pfnparam); |
210 | Bignum primegen(int bits, int modulus, int residue, |
211 | int phase, progfn_t pfn, void *pfnparam); |
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212 | |
213 | /* |
214 | * zlib compression. |
215 | */ |
216 | void zlib_compress_init(void); |
217 | void zlib_decompress_init(void); |
218 | int zlib_compress_block(unsigned char *block, int len, |
219 | unsigned char **outblock, int *outlen); |
220 | int zlib_decompress_block(unsigned char *block, int len, |
221 | unsigned char **outblock, int *outlen); |