diff options
| author | Vadim Dashevskiy <watcherhd@gmail.com> | 2012-07-23 07:10:03 +0000 |
|---|---|---|
| committer | Vadim Dashevskiy <watcherhd@gmail.com> | 2012-07-23 07:10:03 +0000 |
| commit | d828acae837c71992f6a5f9dd688ba7afd944e56 (patch) | |
| tree | 3be6506a6bbf40798199e07d4e2a0f0eef721efc /plugins/Dbx_mmap_SA/Cryptors/RC4/src | |
| parent | 9126d2b133d00b836fca640f847a0948f7579e02 (diff) | |
Dbx_mmap_SA, Import_SA, Dbtool_SA: changed folder structure
git-svn-id: http://svn.miranda-ng.org/main/trunk@1108 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c
Diffstat (limited to 'plugins/Dbx_mmap_SA/Cryptors/RC4/src')
| -rw-r--r-- | plugins/Dbx_mmap_SA/Cryptors/RC4/src/cryptor.c | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/plugins/Dbx_mmap_SA/Cryptors/RC4/src/cryptor.c b/plugins/Dbx_mmap_SA/Cryptors/RC4/src/cryptor.c new file mode 100644 index 0000000000..1f5f61705f --- /dev/null +++ b/plugins/Dbx_mmap_SA/Cryptors/RC4/src/cryptor.c @@ -0,0 +1,133 @@ +#include <windows.h>
+
+#define buf_size 1024
+
+typedef struct{
+ void* (__stdcall *GenerateKey)(char* key);
+ void (__stdcall *FreeKey)(void* key);
+ void (__stdcall *EncryptMem)(BYTE* data, int size, void* key);
+ void (__stdcall *DecryptMem)(BYTE* data, int size, void* key);
+
+ char* Name;
+ char* Info;
+ char* Author;
+ char* Site;
+ char* Email;
+
+ DWORD Version;
+
+ WORD uid;
+} Cryptor;
+
+typedef struct rc4_key
+{
+ BYTE state[256];
+ BYTE x;
+ BYTE y;
+} rc4_key;
+
+#define swap_byte(x,y) t = *(x); *(x) = *(y); *(y) = t
+
+void prepare_key(BYTE *key_data_ptr, size_t key_data_len, rc4_key *key)
+{
+ int i = 0;
+ BYTE t = 0;
+ BYTE index1 = 0;
+ BYTE index2 = 0;
+ BYTE* state = 0;
+ unsigned long counter = 0;
+
+ state = &key->state[0];
+ for(counter = 0; counter < 256; counter++)
+ state[counter] = (BYTE)counter;
+ key->x = 0;
+ key->y = 0;
+ index1 = 0;
+ index2 = 0;
+ for(counter = 0; counter < 256; counter++)
+ {
+ index2 = (key_data_ptr[index1] + state[counter] + index2) % 256;
+ swap_byte(&state[counter], &state[index2]);
+ index1 = (index1 + 1) % key_data_len;
+ }
+}
+
+void rc4(BYTE *buffer_ptr, int buffer_len, rc4_key *key)
+{
+ BYTE t = 0;
+ BYTE x = 0;
+ BYTE y = 0;
+ BYTE* state = 0;
+ BYTE xorIndex = 0;
+ DWORD counter = 0;
+ BYTE old_state[256];
+
+ x = key->x;
+ y = key->y;
+ state = &key->state[0];
+ memcpy(old_state, key->state, 256);
+ for(counter = 0; counter < (DWORD)buffer_len; counter++)
+ {
+ x = (x + 1) % 256;
+ y = (state[x] + y) % 256;
+ swap_byte(&state[x], &state[y]);
+ xorIndex = (state[x] + state[y]) % 256;
+ buffer_ptr[counter] ^= state[xorIndex];
+ }
+ memcpy(key->state, old_state, 256);
+ //key->x = x;
+ //key->y = y;
+}
+
+
+void zero_fill(BYTE * pBuf, size_t bufSize)
+{
+ size_t i;
+ for(i = 0; i < bufSize; i++)
+ pBuf[i] = 0;
+}
+
+void* __stdcall GenerateKey(char* pwd)
+{
+ rc4_key* key;
+ key = (rc4_key*)malloc(sizeof(rc4_key));
+ zero_fill((BYTE*)key, sizeof(key));
+ prepare_key(pwd, strlen(pwd), key);
+ return key;
+}
+
+void __stdcall FreeKey(void* key)
+{
+ free(key);
+}
+
+void __stdcall EncryptMem(BYTE* data, int size, void* key)
+{
+ rc4(data, size, key);
+}
+
+void __stdcall DecryptMem(BYTE* data, int size, void* key)
+{
+ rc4(data, size, key);
+}
+
+Cryptor cryptor =
+ {
+ GenerateKey,
+ FreeKey,
+ EncryptMem,
+ DecryptMem,
+ "RC4",
+ "Old, very easy to crack stream cipher",
+ "Unknown",
+ "http://ru.wikipedia.org/wiki/RC4",
+ "nomail",
+ 0x00000100,
+ 0xDEAD
+ };
+
+
+__declspec(dllexport) Cryptor* GetCryptor()
+{
+ return &cryptor;
+}
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