61 lines
1.3 KiB
C
61 lines
1.3 KiB
C
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#include "PSDGenerate.h"
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/********************************************************************************************************************
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* 新版密码支持BCD码 *
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********************************************************************************************************************/
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uint64_t Scramble(uint64_t number, uint64_t max)
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{
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int i = 0;
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// some random values
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uint64_t scramblers[] = { 3, 5, 7, 31, 343, 2348, 89897 };
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number += (max / 7) + 6;
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number %= max;
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// shuffle according to divisibility
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for (i = 0; i < 7; i++)
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{
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if (scramblers[i] >= max / 3) break;
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number = ((number * scramblers[i]) % max)
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+ ((number * scramblers[i]) / max);
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}
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return number % max;
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}
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int GetPasswordByUidCode(const uint8_t *uidcode,uint8_t* psd)
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{
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uint64_t val = 0,val1 = 0;
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int i= 0;
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uint64_t ulBCDPsd = 0;
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for(i=2;i<10;i++)
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{
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val *=10;
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val += uidcode[i]-0x30;
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}
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val += uidcode[10];
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for(i=11;i<16;i++)
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{
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val1 *=10;
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val1 += uidcode[i]-0x30;
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}
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val = val + val1;
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ulBCDPsd = Scramble(val, 0xFFFFFFFF);
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psd[0] = (ulBCDPsd&0xFF000000)>>24;
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psd[1] = (ulBCDPsd&0x00FF0000)>>16;
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psd[2] = (ulBCDPsd&0x0000FF00)>>8;
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psd[3] = ulBCDPsd&0x000000FF;
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return 0;
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}
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