1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
|
#include "commonheaders.h"
const unsigned char IV[] = "PSKhell@MIRANDA!";
// generate KeyA pair, return public key as ASCII
LPSTR __cdecl cpp_init_keya(HANDLE context, int features) {
pCNTX ptr = get_context_on_id(context); if (!ptr) return NULL;
pSIMDATA p = (pSIMDATA) cpp_alloc_pdata(ptr);
int send_features = FEATURES;
if (p->KeyP) send_features |= FEATURES_PSK;
SAFE_DELETE(p->dh);
if (features & FEATURES_NEWPG) {
Integer p0("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
Integer q0("0xF1515160E1BFC7636338C13AD5BA775318E287147A1F96B73CF0FB4D97EFFB9D1FCDCF31AB9D92C4F49C9F8D50F06E697D2313E2EBAC7781312A51F458D66FFC687960CAA86BDF150A36ED53D79FBDB4F501FD25E37C181B45F9555D7F1C6124CAB29A822AD1E7BF5DA93C2FDB12A61919B5E5359793CBB16E71516919040A7F");
Integer g0("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
p->dh = new DH(p0,q0,g0);
}
else {
Integer p0("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
Integer g0("0x12A567BC9ABCDEF1234567823BCDEF1E");
p->dh = new DH(p0,g0);
}
BYTE priv1[KEYSIZE]; // private key of 2048 bit
BYTE publ1[KEYSIZE+2]; // public key of 2048 bit + faetures field
memset(priv1,0,sizeof(priv1));
memset(publ1,0,sizeof(publ1));
AutoSeededRandomPool autorng;
p->dh->GenerateKeyPair(autorng, priv1, publ1);
SAFE_FREE(p->PubA);
p->PubA = (PBYTE) malloc(KEYSIZE);
memcpy(p->PubA,publ1,KEYSIZE);
SAFE_FREE(p->KeyA);
p->KeyA = (PBYTE) malloc(KEYSIZE);
memcpy(p->KeyA,priv1,KEYSIZE);
if (p->KeyP) {
// encrypt PUBLIC use PSK
string ciphered;
CFB_Mode<AES>::Encryption enc(p->KeyP,Tiger::DIGESTSIZE,IV);
StreamTransformationFilter cbcEncryptor(enc,new StringSink(ciphered));
cbcEncryptor.Put(publ1,KEYSIZE);
cbcEncryptor.MessageEnd();
memcpy(publ1,ciphered.data(),ciphered.length());
#if defined(_DEBUG) || defined(NETLIB_LOG)
Sent_NetLog("cpp_init_keya: %d %d",KEYSIZE,ciphered.length());
#endif
}
memcpy((PVOID)&publ1[KEYSIZE],(PVOID)&send_features,2);
if (ptr->mode & MODE_BASE64 || features & FEATURES_NEWPG)
replaceStr(ptr->tmp, mir_base64_encode(publ1,KEYSIZE+2));
else
replaceStr(ptr->tmp, base16encode((LPSTR)&publ1,KEYSIZE+2));
return ptr->tmp;
}
// store KeyB
int __cdecl cpp_init_keyb(HANDLE context, LPCSTR key) {
pCNTX ptr = get_context_on_id(context); if (!ptr) return 0;
pSIMDATA p = (pSIMDATA) cpp_alloc_pdata(ptr);
unsigned clen = (unsigned)rtrim(key);
ptr->features = 0;
LPSTR pub_binary;
if ((clen==KEYSIZE*2) || (clen==(KEYSIZE+2)*2))
pub_binary = base16decode(key,&clen);
else
pub_binary = (LPSTR)mir_base64_decode(key,&clen);
if ( !pub_binary || (clen!=KEYSIZE && clen!=KEYSIZE+2) ) {
#if defined(_DEBUG) || defined(NETLIB_LOG)
Sent_NetLog("cpp_init_keyb: error bad_keyb");
#endif
ptr->error = ERROR_BAD_KEYB;
mir_free(pub_binary);
return 0;
}
if (clen==KEYSIZE+2)
memcpy((PVOID)&ptr->features,(PVOID)(pub_binary+KEYSIZE),2);
if (p->KeyP) {
if (!(ptr->features & FEATURES_PSK)) { // if NO PSK on other side
#if defined(_DEBUG) || defined(NETLIB_LOG)
Sent_NetLog("cpp_init_keyb: error no_psk");
#endif
ptr->error = ERROR_NO_PSK;
return 0;
}
ptr->error = ERROR_BAD_PSK;
try {
// decrypt PUBLIC use PSK
string unciphered;
CFB_Mode<AES>::Decryption dec(p->KeyP,Tiger::DIGESTSIZE,IV);
StreamTransformationFilter cbcDecryptor(dec,new StringSink(unciphered));
cbcDecryptor.Put((PBYTE)pub_binary,KEYSIZE);
cbcDecryptor.MessageEnd();
memcpy(pub_binary,unciphered.data(),unciphered.length());
}
catch (...) {
#if defined(_DEBUG) || defined(NETLIB_LOG)
Sent_NetLog("cpp_init_keyb: error bad_psk");
#endif
return 0;
}
}
mir_free(p->KeyB);
p->KeyB = (PBYTE) pub_binary;
if (p->PubA && memcmp(p->PubA,p->KeyB,KEYSIZE)==0) {
#if defined(_DEBUG) || defined(NETLIB_LOG)
Sent_NetLog("cpp_init_keyb: error bad_keyb keya==keyb");
#endif
mir_free(p->KeyB);
ptr->error = ERROR_BAD_KEYB;
return 0;
}
ptr->error = ERROR_NONE;
return 1;
}
// calculate secret key, return true or false
int __cdecl cpp_calc_keyx(HANDLE context) {
pCNTX ptr = get_context_on_id(context); if (!ptr) return 0;
pSIMDATA p = (pSIMDATA) cpp_alloc_pdata(ptr);
if (!p->KeyA) { ptr->error = ERROR_NO_KEYA; return 0; }
if (!p->KeyB) { ptr->error = ERROR_NO_KEYB; return 0; }
ptr->error = ERROR_NONE;
BYTE agreeVal[KEYSIZE];
memset(agreeVal,0,sizeof(agreeVal));
BYTE agr = p->dh->Agree(agreeVal, p->KeyA, p->KeyB, true); // calculate key
if (agr) {
// not needed anymore
SAFE_FREE(p->PubA);
SAFE_FREE(p->KeyA);
mir_free(p->KeyB); p->KeyB = 0;
BYTE buffer[Tiger::DIGESTSIZE]; // buffer for hash
memset(buffer,0,sizeof(buffer));
// do this only if key exchanged is ok
// we use a 192bit key (24*8)
Tiger().CalculateDigest(buffer, agreeVal, KEYSIZE); // calculate hash
// store key
SAFE_FREE(p->KeyX);
p->KeyX = (PBYTE) malloc(Tiger::DIGESTSIZE);
memcpy(p->KeyX,buffer,Tiger::DIGESTSIZE);
}
return (int)agr;
}
// create pre-shared key from password
int __cdecl cpp_init_keyp(HANDLE context, LPCSTR password) {
pCNTX ptr = get_context_on_id(context); if (!ptr) return 0;
pSIMDATA p = (pSIMDATA) cpp_alloc_pdata(ptr);
BYTE buffer[Tiger::DIGESTSIZE]; // buffer for hash
memset(buffer,0,sizeof(buffer));
// calculate hash
Tiger().CalculateDigest(buffer,(PBYTE)password,strlen(password));
// store pre-shared key
SAFE_FREE(p->KeyP);
p->KeyP = (PBYTE) malloc(Tiger::DIGESTSIZE);
memcpy(p->KeyP,buffer,Tiger::DIGESTSIZE);
return 1;
}
// EOF
|
