Ordine nelle cartelle. Modificato encrypt+decrypt
This commit is contained in:
Giulio De Pasquale
parent
61ba182b13
commit
1202a2156f
@ -1,128 +0,0 @@
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def datastrlen:
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###############
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# r0 = offset of str in data
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# retval (r0) = strlen
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###############
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push r1
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push r2
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push r3
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movr s2, r0
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movi s1, 0
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lodr s0, s2
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cmpb s0, 0
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jpei exit
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loop:
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movi s2, 0
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addi s1, 1
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addr s2, s1
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lodr s0, s2
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cmpb s0, 0
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jpni loop
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exit:
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movr r0, s1
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poop r3
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poop r2
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poop r1
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retn
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def round: # round(uint16_t text[2])
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#################
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# r0 = offset of text[0] in data
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# r1 = offset of text[1] in data
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# r2 = text[0]
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# r3 = text[1]
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# retval = void
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################
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push r1
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push r2
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push r3
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lodr r2, r0 # text[0]
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lodr r3, r1 # text[1]
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movi s0, 0 # i
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movi s1, 0 # sum
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loop:
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push s0 # saving i
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addi s1, 0x626f # sum += delta
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push s1 # saving sum
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# s0 and s1 will be used as tmps
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#########
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# calc v0
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#########
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movr s0, r3
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shli s0, 4
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addi s0, 0x7065 # s0 = (text[1] << 4) + k0
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movr s1, r3
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poop s3 # restoring sum in s3
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addr s1, s3 # s1 = text[1] + sum
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push s3 # saving sum again
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xorr s0, s1 # s0 = ((text[1] << 4) + k0) ^ (text[1] + sum)
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push s0
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movr s0, r3
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shri s0, 5
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addi s0, 0x7065 # s0 = (text[1] >> 5) + k1
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poop s1
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xorr s0, s1 # s0 = ((text[1] << 4) + k0) ^ (text[1] + sum) ^ ((text[1] >> 5) + k1)
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addr r2, s0 # r2 += s0
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#########
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# calc v1
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#########
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movr s0, r2
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shli s0, 4
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addi s0, 0x7275 # s0 = (text[0] << 4) + k2
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movr s1, r2
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poop s3 # restoring sum in s3
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addr s1, s3 # s1 = text[0] + sum
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push s3 # saving sum again
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xorr s0, s1 # s0 = ((text[0] << 4) + k2) ^ (text[0] + sum)
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push s0
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movr s0, r2
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shri s0, 5
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addi s0, 0x6e73 # s0 = (text[0] >> 5) + k3
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poop s1
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xorr s0, s1 # s0 = ((text[0] << 4) + k2) ^ (text[0] + sum) ^ ((text[0] >> 5) + k3)
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addr r3, s0 # r3 += s0
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######
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# end loop
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#####
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poop s1 # restoring sum
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poop s0 # restoring i
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addi s0, 1
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cmpb s0, 127 # while (i < 128)
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jpbi loop
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# saving the values
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strr r0, r2
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strr r1, r3
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poop r3
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poop r2
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poop r1
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retn
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def main:
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movi r0, 0xadde
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movi r1, 0x0bb0
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stri 0, r0
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stri 2, r1
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movi r0, 0x0bb0
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movi r1, 0xcefa
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stri 0x4, r0
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stri 0x6, r1
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movi r0, 0
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call datastrlen
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movr r2, r0
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movi s0, 0
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encrypt:
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push s0
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movi r0, 0
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movi r1, 2
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addr r0, s0
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addr r1, s0
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call round
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poop s0
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addi s0, 1
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cmpr s0, r2
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jpbi encrypt
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lodi r0, 0
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lodi r1, 2
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lodi r2, 4
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lodi r3, 6
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shit
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@ -1,115 +0,0 @@
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#include "../vm/vm.h"
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#include <fstream>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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int main(int argc, char *argv[]) {
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unsigned char banner[] = {
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0x5f, 0x5f, 0x5f, 0x5f, 0x5f, 0x5f, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x20, 0x20, 0x20, 0x5f, 0x20, 0x20, 0x20, 0x5f, 0x20, 0x20, 0x20, 0x20,
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x5f, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x20, 0x20, 0x5f, 0x20, 0x20, 0x20, 0x5f, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x5f, 0x5f, 0x20, 0x20, 0x20, 0x5f, 0x5f, 0x5f, 0x5f, 0x5f, 0x20, 0x20,
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0x5f, 0x5f, 0x5f, 0x5f, 0x5f, 0x20, 0x20, 0x5f, 0x5f, 0x5f, 0x5f, 0x5f,
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0x5f, 0x0a, 0x7c, 0x20, 0x5f, 0x5f, 0x5f, 0x20, 0x5c, 0x20, 0x20, 0x20,
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0x20, 0x20, 0x20, 0x20, 0x7c, 0x20, 0x7c, 0x20, 0x28, 0x5f, 0x29, 0x20,
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x28, 0x5f, 0x29, 0x20, 0x20,
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0x20, 0x20, 0x20, 0x7c, 0x20, 0x7c, 0x20, 0x7c, 0x20, 0x7c, 0x20, 0x20,
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x20, 0x2f, 0x20, 0x20, 0x7c, 0x20, 0x7c, 0x5f, 0x5f, 0x5f, 0x5f, 0x20,
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0x7c, 0x7c, 0x5f, 0x5f, 0x5f, 0x5f, 0x20, 0x7c, 0x7c, 0x5f, 0x5f, 0x5f,
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0x20, 0x20, 0x2f, 0x0a, 0x7c, 0x20, 0x7c, 0x5f, 0x2f, 0x20, 0x2f, 0x5f,
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0x20, 0x5f, 0x20, 0x5f, 0x5f, 0x5f, 0x7c, 0x20, 0x7c, 0x5f, 0x20, 0x5f,
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0x20, 0x20, 0x5f, 0x5f, 0x5f, 0x20, 0x5f, 0x5f, 0x5f, 0x20, 0x5f, 0x20,
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0x20, 0x5f, 0x5f, 0x5f, 0x20, 0x7c, 0x20, 0x7c, 0x5f, 0x7c, 0x20, 0x7c,
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0x5f, 0x20, 0x5f, 0x5f, 0x5f, 0x20, 0x20, 0x20, 0x5f, 0x5f, 0x20, 0x20,
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0x20, 0x5f, 0x5f, 0x60, 0x7c, 0x20, 0x7c, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x2f, 0x20, 0x2f, 0x20, 0x20, 0x20, 0x20, 0x2f, 0x20, 0x2f, 0x20, 0x20,
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0x20, 0x2f, 0x20, 0x2f, 0x20, 0x0a, 0x7c, 0x20, 0x20, 0x5f, 0x5f, 0x2f,
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0x20, 0x5f, 0x60, 0x20, 0x2f, 0x20, 0x5f, 0x5f, 0x7c, 0x20, 0x5f, 0x5f,
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0x7c, 0x20, 0x7c, 0x2f, 0x20, 0x5f, 0x5f, 0x2f, 0x20, 0x5f, 0x5f, 0x7c,
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0x20, 0x7c, 0x2f, 0x20, 0x5f, 0x20, 0x5c, 0x7c, 0x20, 0x5f, 0x5f, 0x7c,
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0x20, 0x5f, 0x5f, 0x2f, 0x20, 0x5f, 0x20, 0x5c, 0x20, 0x20, 0x5c, 0x20,
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0x5c, 0x20, 0x2f, 0x20, 0x2f, 0x20, 0x7c, 0x20, 0x7c, 0x20, 0x20, 0x20,
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0x20, 0x20, 0x5c, 0x20, 0x5c, 0x20, 0x20, 0x20, 0x20, 0x5c, 0x20, 0x5c,
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0x20, 0x20, 0x2f, 0x20, 0x2f, 0x20, 0x20, 0x0a, 0x7c, 0x20, 0x7c, 0x20,
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0x7c, 0x20, 0x28, 0x5f, 0x7c, 0x20, 0x5c, 0x5f, 0x5f, 0x20, 0x5c, 0x20,
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0x7c, 0x5f, 0x7c, 0x20, 0x7c, 0x20, 0x28, 0x5f, 0x7c, 0x20, 0x28, 0x5f,
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0x5f, 0x7c, 0x20, 0x7c, 0x20, 0x28, 0x5f, 0x29, 0x20, 0x7c, 0x20, 0x7c,
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0x5f, 0x7c, 0x20, 0x7c, 0x7c, 0x20, 0x28, 0x5f, 0x29, 0x20, 0x7c, 0x20,
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0x20, 0x5c, 0x20, 0x56, 0x20, 0x2f, 0x20, 0x5f, 0x7c, 0x20, 0x7c, 0x5f,
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0x2e, 0x5f, 0x5f, 0x5f, 0x2f, 0x20, 0x2f, 0x2e, 0x5f, 0x5f, 0x5f, 0x2f,
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0x20, 0x2f, 0x2e, 0x2f, 0x20, 0x2f, 0x20, 0x20, 0x20, 0x0a, 0x5c, 0x5f,
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0x7c, 0x20, 0x20, 0x5c, 0x5f, 0x5f, 0x2c, 0x5f, 0x7c, 0x5f, 0x5f, 0x5f,
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0x2f, 0x5c, 0x5f, 0x5f, 0x7c, 0x5f, 0x7c, 0x5c, 0x5f, 0x5f, 0x5f, 0x5c,
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0x5f, 0x5f, 0x5f, 0x7c, 0x5f, 0x7c, 0x5c, 0x5f, 0x5f, 0x5f, 0x2f, 0x20,
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0x5c, 0x5f, 0x5f, 0x7c, 0x5c, 0x5f, 0x5f, 0x5c, 0x5f, 0x5f, 0x5f, 0x2f,
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0x20, 0x20, 0x20, 0x20, 0x5c, 0x5f, 0x28, 0x5f, 0x29, 0x5c, 0x5f, 0x5f,
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0x5f, 0x2f, 0x5c, 0x5f, 0x5f, 0x5f, 0x5f, 0x28, 0x5f, 0x29, 0x5f, 0x5f,
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0x5f, 0x5f, 0x2f, 0x20, 0x5c, 0x5f, 0x2f, 0x20, 0x20, 0x20, 0x20, 0x0a,
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x20, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
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0x20, 0x20, 0x20, 0x0a, 0x20, 0x2f, 0x5c, 0x2f, 0x2f, 0x5c, 0x2f, 0x2f,
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0x5c, 0x2f, 0x2f, 0x5c, 0x2f, 0x2f, 0x5c, 0x2f, 0x2f, 0x5c, 0x2f, 0x2f,
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0x5c, 0x2f, 0x2f, 0x5c, 0x2f, 0x2f, 0x5c, 0x2f, 0x2f, 0x5c, 0x2f, 0x2f,
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0x5c, 0x2f, 0x2f, 0x5c, 0x2f, 0x2f, 0x5c, 0x2f, 0x2f, 0x5c, 0x2f, 0x2f,
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0x5c, 0x2f, 0x2f, 0x5c, 0x2f, 0x2f, 0x5c, 0x2f, 0x2f, 0x5c, 0x2f, 0x2f,
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0x5c, 0x2f, 0x2f, 0x5c, 0x2f, 0x2f, 0x5c, 0x2f, 0x2f, 0x5c, 0x2f, 0x2f,
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0x5c, 0x2f, 0x2f, 0x5c, 0x2f, 0x2f, 0x5c, 0x2f, 0x2f, 0x5c, 0x2f, 0x2f,
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0x5c, 0x2f, 0x7c, 0x20, 0x20, 0x0a, 0x7c, 0x2f, 0x5c, 0x2f, 0x2f, 0x5c,
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0x2f, 0x2f, 0x5c, 0x2f, 0x2f, 0x5c, 0x2f, 0x2f, 0x5c, 0x2f, 0x2f, 0x5c,
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0x2f, 0x2f, 0x5c, 0x2f, 0x2f, 0x5c, 0x2f, 0x2f, 0x5c, 0x2f, 0x2f, 0x5c,
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0x2f, 0x2f, 0x5c, 0x2f, 0x2f, 0x5c, 0x2f, 0x2f, 0x5c, 0x2f, 0x2f, 0x5c,
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0x2f, 0x2f, 0x5c, 0x2f, 0x2f, 0x5c, 0x2f, 0x2f, 0x5c, 0x2f, 0x2f, 0x5c,
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0x2f, 0x2f, 0x5c, 0x2f, 0x2f, 0x5c, 0x2f, 0x2f, 0x5c, 0x2f, 0x2f, 0x5c,
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0x2f, 0x2f, 0x5c, 0x2f, 0x2f, 0x5c, 0x2f, 0x2f, 0x5c, 0x2f, 0x2f, 0x5c,
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0x2f, 0x2f, 0x5c, 0x2f, 0x20, 0x20, 0x20};
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unsigned char bc[] = {
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0x48, 0x00, 0xde, 0xad, 0x48, 0x01, 0xb0, 0x0b, 0xd4, 0x00, 0x00, 0x00,
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0xd4, 0x02, 0x00, 0x01, 0x48, 0x00, 0xb0, 0x0b, 0x48, 0x01, 0xfa, 0xce,
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0xd4, 0x04, 0x00, 0x00, 0xd4, 0x06, 0x00, 0x01, 0x48, 0x00, 0x00, 0x00,
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0xd8, 0xd9, 0x00, 0xcb, 0x20, 0x48, 0x04, 0x00, 0x00, 0xde, 0x04, 0x48,
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0x00, 0x00, 0x00, 0x48, 0x01, 0x02, 0x00, 0x39, 0x04, 0x39, 0x14, 0xd8,
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0x5a, 0x00, 0x5c, 0x04, 0x05, 0x04, 0x01, 0x00, 0xd7, 0x42, 0x93, 0x2d,
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0x00, 0x22, 0x00, 0x00, 0x00, 0x22, 0x01, 0x02, 0x00, 0x22, 0x02, 0x04,
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0x00, 0x22, 0x03, 0x06, 0x00, 0x5d, 0xde, 0x01, 0xde, 0x02, 0xde, 0x03,
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||||||
0x12, 0x20, 0x12, 0x31, 0x48, 0x04, 0x00, 0x00, 0x48, 0x05, 0x00, 0x00,
|
|
||||||
0xde, 0x04, 0x05, 0x05, 0x6f, 0x62, 0xde, 0x05, 0xcb, 0x43, 0x20, 0x04,
|
|
||||||
0x04, 0x00, 0x05, 0x04, 0x65, 0x70, 0xcb, 0x53, 0x5c, 0x07, 0x39, 0x57,
|
|
||||||
0xde, 0x07, 0xb1, 0x45, 0xde, 0x04, 0xcb, 0x43, 0x36, 0x04, 0x05, 0x00,
|
|
||||||
0x05, 0x04, 0x65, 0x70, 0x5c, 0x05, 0xb1, 0x45, 0x39, 0x24, 0xcb, 0x42,
|
|
||||||
0x20, 0x04, 0x04, 0x00, 0x05, 0x04, 0x75, 0x72, 0xcb, 0x52, 0x5c, 0x07,
|
|
||||||
0x39, 0x57, 0xde, 0x07, 0xb1, 0x45, 0xde, 0x04, 0xcb, 0x42, 0x36, 0x04,
|
|
||||||
0x05, 0x00, 0x05, 0x04, 0x73, 0x6e, 0x5c, 0x05, 0xb1, 0x45, 0x39, 0x34,
|
|
||||||
0x5c, 0x05, 0x5c, 0x04, 0x05, 0x04, 0x01, 0x00, 0xf4, 0x04, 0x7f, 0x93,
|
|
||||||
0x6c, 0x00, 0x4e, 0x02, 0x4e, 0x13, 0x5c, 0x03, 0x5c, 0x02, 0x5c, 0x01,
|
|
||||||
0xbb, 0xde, 0x01, 0xde, 0x02, 0xde, 0x03, 0xcb, 0x60, 0x48, 0x05, 0x00,
|
|
||||||
0x00, 0x12, 0x46, 0xf4, 0x04, 0x00, 0x38, 0xff, 0x00, 0x48, 0x06, 0x00,
|
|
||||||
0x00, 0x05, 0x05, 0x01, 0x00, 0x39, 0x65, 0x12, 0x46, 0xf4, 0x04, 0x00,
|
|
||||||
0xae, 0xed, 0x00, 0xcb, 0x05, 0x5c, 0x03, 0x5c, 0x02, 0x5c, 0x01, 0xbb};
|
|
||||||
unsigned int bclen = 264;
|
|
||||||
|
|
||||||
unsigned char opcode_key[] = {0x48, 0x61, 0x76, 0x65, 0x46, 0x75, 0x6e,
|
|
||||||
0x21, 0x50, 0x6f, 0x6c, 0x69, 0x43, 0x54,
|
|
||||||
0x46, 0x32, 0x30, 0x31, 0x37, 0x21};
|
|
||||||
|
|
||||||
printf("%s", banner);
|
|
||||||
printf("\nHmmm...\n");
|
|
||||||
VM vm(opcode_key, bc, bclen);
|
|
||||||
vm.run();
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
@ -1,81 +0,0 @@
|
|||||||
#include "../vm/vm.h"
|
|
||||||
#include "../vm/debug.h"
|
|
||||||
#include <fstream>
|
|
||||||
#include <iostream>
|
|
||||||
#include <stdint.h>
|
|
||||||
#include <stdio.h>
|
|
||||||
#include <stdlib.h>
|
|
||||||
#include <time.h>
|
|
||||||
#include <unistd.h>
|
|
||||||
|
|
||||||
#define KEYLEN 15
|
|
||||||
#define CODESIZE 0x300
|
|
||||||
#define DATAKEYLEN 30
|
|
||||||
|
|
||||||
void gen_random(uint8_t *s, const int len) {
|
|
||||||
srand(time(NULL));
|
|
||||||
static const char alphanum[] = "0123456789"
|
|
||||||
"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
|
|
||||||
"abcdefghijklmnopqrstuvwxyz";
|
|
||||||
for (int i = 0; i < len; ++i) {
|
|
||||||
s[i] = alphanum[rand() % (sizeof(alphanum) - 1)];
|
|
||||||
}
|
|
||||||
|
|
||||||
s[len] = 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
unsigned char encrypted_data[] = {
|
|
||||||
0xcc, 0x8d, 0x5a, 0xcc, 0x73, 0xb5, 0xf2, 0xa3, 0xf3, 0x92,
|
|
||||||
0xa8, 0x8f, 0x2f, 0xf1, 0x3e, 0xf4, 0x69, 0x00, 0x4a, 0xcb,
|
|
||||||
0xed, 0xc4, 0x57, 0x9b, 0xf6, 0x9a, 0x78, 0x46, 0x83, 0xe9};
|
|
||||||
unsigned int encrypted_data_len = 30;
|
|
||||||
|
|
||||||
int main(int argc, char *argv[]) {
|
|
||||||
uint8_t *key = new uint8_t[KEYLEN], *decdatasec = new uint8_t[DATAKEYLEN],
|
|
||||||
*flag = new uint8_t[DATAKEYLEN];
|
|
||||||
uint8_t *clientcode;
|
|
||||||
uint8_t i;
|
|
||||||
uint32_t clientcodesize, bytesread;
|
|
||||||
FILE *datap, *flagp;
|
|
||||||
|
|
||||||
gen_random(key, KEYLEN);
|
|
||||||
printf("Use this: \"%s\"\n", key);
|
|
||||||
printf("How much data are you sending me?\n");
|
|
||||||
scanf("%d", &clientcodesize);
|
|
||||||
printf("Go ahead then!\n");
|
|
||||||
clientcode = new uint8_t[clientcodesize];
|
|
||||||
bytesread = read(0, clientcode, clientcodesize);
|
|
||||||
if (bytesread != clientcodesize) {
|
|
||||||
printf("ERROR! Couldn't read everything!\n");
|
|
||||||
exit(1);
|
|
||||||
}
|
|
||||||
VM vm(key, clientcode, clientcodesize);
|
|
||||||
vm.as.insData(encrypted_data, encrypted_data_len);
|
|
||||||
vm.run();
|
|
||||||
|
|
||||||
datap = fopen("./res/decrypteddatasection.txt", "r");
|
|
||||||
if (datap == NULL) {
|
|
||||||
printf("Couldn't open decrypteddatasection.txt!\n");
|
|
||||||
exit(1);
|
|
||||||
}
|
|
||||||
fscanf(datap, "%s", decdatasec);
|
|
||||||
fclose(datap);
|
|
||||||
|
|
||||||
for (i = 0; i < DATAKEYLEN; i++) {
|
|
||||||
if (vm.as.data[i] != decdatasec[i]) {
|
|
||||||
DBG_INFO(("Checking data[%d]..\n", i));
|
|
||||||
printf("Nope!\n");
|
|
||||||
exit(1);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
flagp = fopen("./res/flag.txt", "r");
|
|
||||||
if (flagp == NULL) {
|
|
||||||
printf("Couldn't open flag.txt!\n");
|
|
||||||
exit(1);
|
|
||||||
}
|
|
||||||
fscanf(flagp, "%s", flag);
|
|
||||||
fclose(flagp);
|
|
||||||
printf("Congratulations!\nThe flag is: %s\n", flag);
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
@ -1,27 +0,0 @@
|
|||||||
#include <stdint.h>
|
|
||||||
#include <stdio.h>
|
|
||||||
#include <stdlib.h>
|
|
||||||
#include <unistd.h>
|
|
||||||
|
|
||||||
void decrypt(uint32_t *v, uint32_t *k) {
|
|
||||||
uint32_t v0 = v[0], v1 = v[1], sum = 0xC6EF3720, i; /* set up */
|
|
||||||
uint32_t delta = 0x9e3779b9; /* a key schedule constant */
|
|
||||||
uint32_t k0 = k[0], k1 = k[1], k2 = k[2], k3 = k[3]; /* cache key */
|
|
||||||
for (i = 0; i < 32; i++) { /* basic cycle start */
|
|
||||||
v1 -= ((v0 << 4) + k2) ^ (v0 + sum) ^ ((v0 >> 5) + k3);
|
|
||||||
v0 -= ((v1 << 4) + k0) ^ (v1 + sum) ^ ((v1 >> 5) + k1);
|
|
||||||
sum -= delta;
|
|
||||||
} /* end cycle */
|
|
||||||
v[0] = v0;
|
|
||||||
v[1] = v1;
|
|
||||||
}
|
|
||||||
|
|
||||||
int main(int argc, char *argv[]) {
|
|
||||||
if (argc != 3) {
|
|
||||||
printf("Usage: %s text_to_decrypt key", argv[0]);
|
|
||||||
exit(1);
|
|
||||||
}
|
|
||||||
decrypt((uint32_t*)argv[1], (uint32_t*)argv[2]);
|
|
||||||
printf("Result: %s", argv[1]);
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
@ -1,44 +0,0 @@
|
|||||||
#include <stdint.h>
|
|
||||||
#include <stdio.h>
|
|
||||||
#include <stdlib.h>
|
|
||||||
#include <string.h>
|
|
||||||
#include <unistd.h>
|
|
||||||
|
|
||||||
void encrypt(uint16_t *v) {
|
|
||||||
uint16_t v0 = v[0], v1 = v[1], sum = 0, i; /* set up */
|
|
||||||
uint16_t delta = 0x626f;
|
|
||||||
uint16_t k0 = 0x7065; // "pe"
|
|
||||||
uint16_t k1 = 0x7065; // "pe"
|
|
||||||
uint16_t k2 = 0x7275; // "ru"
|
|
||||||
uint16_t k3 = 0x6e73; // "ns"
|
|
||||||
// printf("v0: 0x%x, v1: 0x%x\n", v0, v1);
|
|
||||||
for (i = 0; i < 128; i++) {
|
|
||||||
sum += delta;
|
|
||||||
v0 += ((v1 << 4) + k0) ^ (v1 + sum) ^ ((v1 >> 5) + k1);
|
|
||||||
v1 += ((v0 << 4) + k2) ^ (v0 + sum) ^ ((v0 >> 5) + k3);
|
|
||||||
// printf("Intermediate v0: 0x%x | v1: 0x%x\n", v0, v1);
|
|
||||||
}
|
|
||||||
// printf("SUM: 0x%x\n", sum);
|
|
||||||
// printf("v0: 0x%x, v1: 0x%x\n", v0, v1);
|
|
||||||
v[0] = v0;
|
|
||||||
v[1] = v1;
|
|
||||||
}
|
|
||||||
|
|
||||||
int main(int argc, char *argv[]) {
|
|
||||||
uint8_t *buf;
|
|
||||||
uint32_t buflen, i;
|
|
||||||
if (argc != 2) {
|
|
||||||
printf("Usage: %s text_to_encrypt", argv[0]);
|
|
||||||
exit(1);
|
|
||||||
}
|
|
||||||
buflen = strlen(argv[1]);
|
|
||||||
buf = (uint8_t *)malloc(buflen);
|
|
||||||
memcpy(buf, argv[1], buflen);
|
|
||||||
for (i = 0; i < buflen; i++) {
|
|
||||||
encrypt((uint16_t *)&buf[i]);
|
|
||||||
}
|
|
||||||
for (i = 0; i < buflen; i++) {
|
|
||||||
printf("%c", buf[i]);
|
|
||||||
}
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
Loading…
Reference in New Issue
Block a user