59 lines
935 B
C
59 lines
935 B
C
#include "basic/basic.h"
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#include "usetable.h"
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#define PW_LEN 8
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void pw_cleanup(char * pw);
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void pw_set(char * pw, uint16_t * k);
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void ram(void)
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{
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char pw[PW_LEN+1];
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uint16_t k[8];
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int button;
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memset(k, 0, 16);
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while(1){
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lcdClear();
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lcdNl();
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lcdPrintln(" password");
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lcdPrintln(" generator");
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lcdNl();
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lcdNl();
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pw_set(pw,k);
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pw_cleanup(pw);
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lcdPrint(" ");
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lcdPrintln(pw);
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lcdRefresh();
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delayms(23);
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while((button=getInputRaw())==BTN_NONE)
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delayms(23);
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if(button==BTN_LEFT) return;
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}
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}
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void pw_cleanup(char * pw)
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{
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int i;
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for(i=0;i<PW_LEN;i++)
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{
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/* strip unwanted ascii chars */
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pw[i]&=0x7f;
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if(pw[i]<0x30)pw[i]+=0x30;
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if(pw[i]>0x7a)pw[i]-=0x10;
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if((pw[i]>'Z')&&(pw[i]<'a'))
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pw[i]-=0x10;
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}
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}
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void pw_set(char * pw, uint16_t * k)
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{
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int i;
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memset(pw,0,PW_LEN); /* wipe old PW */
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for(i=0;i<4;i++)
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k[1]=getRandom();
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xxtea_encode_words(pw,PW_LEN/4,k);
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pw[PW_LEN]=0;
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}
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