-typedef unsigned char U8;
-typedef unsigned short U16;
-typedef unsigned long U32;
-
-typedef union {
- struct {
- U32 serial;
- U32 checksum;
- } element;
- U8 raw[8];
-} V_KeyUnwound;
-
-static inline U32 hash_U32(U32 i)
-{
- i=i*1664525+1013904223;
- i=i*1664525+1013904223;
- i=i*1664525+1013904223;
- return i;
-}
-
-#ifdef BIG_ENDIAN
-static const int endian_fix_table[8] = { 3, 2, 1, 0, 7, 6, 5, 4 } ;
-#define endian_fix(x) (endian_fix_table[x])
-#else
-#define endian_fix(x) (x)
-#endif
-
-int v_unwind_key(V_KeyUnwound* unwound, const char* key)
-{
- int i;
- unwound->element.serial=0;
- unwound->element.checksum=0;
-
- for(i=0;i<16;i++)
- {
- U8 data;
-
- switch(key[i])
- {
- case '0': data=0; break;
- case '1': data=1; break;
- case '2': data=2; break;
- case '3': data=3; break;
- case '4': data=4; break;
- case '5': data=5; break;
- case '6': data=6; break;
- case '7': data=7; break;
- case '8': data=8; break;
- case '9': data=9; break;
- case 'a': case 'A': data=10; break;
- case 'b': case 'B': data=11; break;
- case 'c': case 'C': data=12; break;
- case 'd': case 'D': data=13; break;
- case 'e': case 'E': data=14; break;
- case 'f': case 'F': data=15; break;
- default: return 0; break;
- }
- int bit=i*2;
- unwound->element.checksum|=(((U32)data&3)<<bit);
- unwound->element.serial|=(((U32)(data>>2)&3)<<bit);
- }
- return 1;
-}
-
-int v_key_check(const char* key, U32* serial, U32 appid)
-{
- V_KeyUnwound unwound_key;
- U32 appid_mask_a=hash_U32(appid);
- U32 appid_mask_b=hash_U32(appid_mask_a);
-
- if(!v_unwind_key(&unwound_key, key))
- {
- // Invalid characters in key
- return 0;
- }
-
-
- // Undo obfuscation pass
- {
- U32 next=hash_U32(unwound_key.raw[endian_fix(7)]);
- int i;
- for(i=0;i<7;i++)
- {
- next=hash_U32(next);
- unwound_key.raw[endian_fix(i)]^=(next>>24);
- }
- }
-
- unwound_key.element.serial^=appid_mask_a;
- unwound_key.element.checksum^=appid_mask_b;
-
- *serial=unwound_key.element.serial;
-
- return unwound_key.element.checksum==hash_U32(unwound_key.element.serial);
-}
-
-
-int check_license(String basedir)
-{
-#ifdef LICENSE_KEY_REQUIRED
- String key;
- String license_file;
-
-#ifndef _WIN32
- license_file="/usr/local/etc/.synfiglicense";
-#else
- license_file=basedir+"\\etc\\.synfiglicense";
-#endif
-
- try {
- key=Glib::file_get_contents(license_file);
- } catch (Glib::FileError) { }
- U32 serial(0);
- if(!v_key_check(key.c_str(),&serial,0xdeadbeef))
- {
- while(!v_key_check(key.c_str(),&serial,0xdeadbeef))
- {
- key.clear();
-
- if(!App::dialog_entry(
- _("Synfig Studio Authentication"),
- _("Please enter your license key below. You will not\nbe able to use this software without a valid license key."),
- key
- ))
- throw String("No License");
- }
-
- FILE* file=fopen(license_file.c_str(),"w");
- if(file)
- {
- fprintf(file,"%s",key.c_str());
- fclose(file);
- }
- else
- synfig::error("Unable to save license key!");
- }
- synfig::info("License Authenticated -- Serial #%05d",serial);
- return serial;
-#else
- return 1;
-#endif
-}
-
projects / synfig.git / blobdiff