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Copy pathEWEBRC4.m
executable file
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EWEBRC4.m
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EWEBRC4 ;RC4 Encryption library, written by SAM[ 08/10/2009 2:53 PM ]
; &&& Cache Conversion 11.8.2009 : by RETURN
Q
TORCFOUR(STRING,KEY) ; Converts a string to a RC4 ecrypted set of hex pairs
N HEXSTR1
S HEXSTR1=$$STRTOHEX(STRING)
Q $$RCFOUR(HEXSTR1,KEY)
DERCFOUR(HEXIN,KEY) ; Converts RC4 encrypted hex pairs to a string
N OUTSTR
S OUTSTR=$$RCFOUR(HEXIN,KEY)
Q $$HEXTOSTR(OUTSTR)
RCFOUR(STRING,KEY)
I $G(STRING)=""!$G(KEY)="" Q ""
N COUNTER,KEYPLACE,ACCUMILA,ACCUMILB,RETVAL
S KEYPLACE=1,ACCUMILA=0,ACCUMILB=0
F COUNTER=0:1:255 D
.S ^TMP($J,"S",COUNTER)=COUNTER
.S ^TMP($J,"K",COUNTER)=$A(KEY,KEYPLACE)
.S KEYPLACE=KEYPLACE+1
.I KEYPLACE>$L(KEY) S KEYPLACE=1
.Q
F COUNTER=0:1:255 D
.S ACCUMILA=((ACCUMILA+^TMP($J,"S",COUNTER)+^TMP($J,"K",COUNTER))#256)
.N TMPVAL
.S TMPVAL=^TMP($J,"S",COUNTER)
.S ^TMP($J,"S",COUNTER)=^TMP($J,"S",ACCUMILA)
.S ^TMP($J,"S",ACCUMILA)=TMPVAL
.Q
S ACCUMILA=0
F COUNTER=0:2:(($L(STRING))-2) D
.S ACCUMILB=((ACCUMILB+1)#256)
.S ACCUMILA=((ACCUMILA+^TMP($J,"S",ACCUMILB))#256)
.N TMPVAL,KEYVAL,RESVAL,STRVAL,DECVAL
.S TMPVAL=^TMP($J,"S",ACCUMILB)
.S ^TMP($J,"S",ACCUMILB)=^TMP($J,"S",ACCUMILA)
.S ^TMP($J,"S",ACCUMILA)=TMPVAL
.S KEYVAL=((^TMP($J,"S",ACCUMILA)+^TMP($J,"S",ACCUMILB))#256)
.S STRVAL=$$HEXTOBIN($E(STRING,COUNTER+1,COUNTER+2))
.S DECVAL=$$INTTOBIN(^TMP($J,"S",KEYVAL))
.S RESVAL=$$XORBINS(STRVAL,DECVAL)
. ;W $$BINTOINT(RESVAL)_" "_KEYVAL_" "_^TMP($J,"S",KEYVAL)_" "_$E(STRING,COUNTER+1,COUNTER+2),!
. ;R *k
.S RETVAL=$G(RETVAL)_$$INTTOHEX($$BINTOINT(RESVAL))
.Q
K ^TMP($J,"S"),^TMP($J,"K")
Q RETVAL
STRTOHEX(STRING)
I $G(STRING)="" Q ""
N COUNTER,HEX
F COUNTER=1:1:$L(STRING) D
.N TMPHEX
.S TMPHEX=$$INTTOHEX($A($E(STRING,COUNTER)))
.I $L(TMPHEX)=1 S TMPHEX="0"_TMPHEX
.S HEX=$G(HEX)_TMPHEX
.Q
Q HEX
HEXTOSTR(HEX)
N STR,COUNTER,INTCHAR
F COUNTER=1:2:(($L(HEX))-1) D
.S INTCHAR=$E(HEX,COUNTER,COUNTER+1)
.S INTCHAR=$$HEXTOINT(INTCHAR)
.I INTCHAR>127 Q
.S STR=$G(STR)_$C(INTCHAR)
.Q
Q $G(STR)
HEXTOINT(HEX)
N RESULT,COUNTER
S RESULT=0,HEX=$$UC^LIB(HEX)
F COUNTER=1:1:$L(HEX) D
.S DIGIT=$E(HEX,COUNTER)
.I "0123456789ABCDEF"'[DIGIT Q
.I "ABCDEF"[DIGIT S DIGIT=($A(DIGIT)-55)
.S RESULT=(RESULT*16)+DIGIT
.Q
Q RESULT
INTTOHEX(INT)
I (+$G(INT)=0) Q "00"
N RESULT,DIGIT
S RESULT=""
F Q:INT=0 D
.S DIGIT=INT#16
.S INT=INT\16
.I DIGIT>9 S DIGIT=$C(55+DIGIT)
.S RESULT=DIGIT_$G(RESULT)
.Q
I $L(RESULT)=1 S RESULT="0"_RESULT
Q RESULT
BINTOINT(BINARY)
N PLACE,BINTMP,ACCUM
S PLACE=1,ACCUM=0,BINTMP=BINARY
F Q:BINTMP="" D
.S ACCUM=ACCUM+(PLACE*$E(BINTMP,$L(BINTMP)))
.S BINTMP=$E(BINTMP,1,$L(BINTMP)-1)
.S PLACE=PLACE*2
.Q
Q ACCUM
INTTOBIN(NUMBER)
N BINARY
F Q:NUMBER=0 D
.S BINARY=$G(BINARY)_(NUMBER#2)
.S NUMBER=NUMBER\2
.Q
I $G(BINARY)="" S BINARY="00000000"
Q $$PADLZERO($RE(BINARY))
HEXTOBIN(HEXNUM)
N HEXNUM1,HEXNUM2,HEXBIN
I $L(HEXNUM)>2 Q 0
S HEXNUM1=$E(HEXNUM,$L(HEXNUM)),HEXNUM2=0
I $L(HEXNUM)=2 S HEXNUM2=$E(HEXNUM,1,1)
S HEXBIN=$$HXCTOBIN(HEXNUM2)_$$HXCTOBIN(HEXNUM1)
Q HEXBIN
HXCTOBIN(HEXCHAR) ; Hex char to bin
I ((HEXCHAR'=0)&(+HEXCHAR=0)) S HEXCHAR=$$UC^LIB(HEXCHAR)
I HEXCHAR=0 Q "0000"
I HEXCHAR=1 Q "0001"
I HEXCHAR=2 Q "0010"
I HEXCHAR=3 Q "0011"
I HEXCHAR=4 Q "0100"
I HEXCHAR=5 Q "0101"
I HEXCHAR=6 Q "0110"
I HEXCHAR=7 Q "0111"
I HEXCHAR=8 Q "1000"
I HEXCHAR=9 Q "1001"
I HEXCHAR="A" Q "1010"
I HEXCHAR="B" Q "1011"
I HEXCHAR="C" Q "1100"
I HEXCHAR="D" Q "1101"
I HEXCHAR="E" Q "1110"
I HEXCHAR="F" Q "1111"
Q "0000"
XORBINS(BIN1,BIN2) ; XORS two eight bit binary numbers
I ($G(BIN1)="")!($G(BIN1)=$G(BIN2))!($L($G(BIN1))>8) Q "00000000"
I $L(BIN1)<8 S BIN1=$$PADLZERO(BIN1)
I $G(BIN2)="" Q BIN1
I $L(BIN2)<8 S BIN2=$$PADLZERO(BIN2)
N PLACECNT,XORVAL
F PLACECNT=1:1:8 D
.I $E(BIN1,PLACECNT)=$E(BIN2,PLACECNT) S XORVAL=$G(XORVAL)_0
.I $E(BIN1,PLACECNT)'=$E(BIN2,PLACECNT) S XORVAL=$G(XORVAL)_1
.Q
Q XORVAL
PADLZERO(BINARYNO) ; Pad a binary number out to 8 chars with zeros
I $G(BINARYNO)="" Q "00000000"
F Q:$L(BINARYNO)=8 D
.S BINARYNO=0_BINARYNO
.Q
Q BINARYNO
;##Packaged on 61747,33818 for (13579) uci/patch=29/2761