Encrypt-decrypt

[Lasiaf 0]

er.... bleh mintak tlg x?? kalo aku buat satu string.. pastu nak encryptkannya..

cth:

char[34] a=blablabla

void encrypt(a);

paham tak??... aku cuma tak dapat lagi cara² nak encrypt sesuatu char

ribuan terima kasih untuk yang membantu....

[encik pot pet 0]

http://www.schneier.com/blowfish.html

awak pakai blowfish algo..ok

kalau nak design algo sendiri pun boleh...

afaik, orang2 yang design algo crypto ni mostly taraf phd...

kalau awak rasa boleh challenge dia orang.. silakan

[deejagothic 1]

#include <stdio.h>

#define PROG_NAME "xe"
void usage()
{
printf("-------------------------------n");
printf("Invalid command line.n");
printf("Usage:nt%s infile outfile keyn", PROG_NAME);
printf("-------------------------------n");
}


int main(int argc, char *argv[])
{
int count,bytes; /* counter when looping through file, and bytes to count filesize */
FILE *in,*out; /* In and out FILE Streams to read/write data */

if(argc < 4) { /* Error check the command line */
usage(); /* Display Usage Information on error */
return 0; /* Exit Program returning 0 - no error */
}

if (( in = fopen(argv[1], "rb")) == NULL) /* Error Check File Streams */
{
printf("Error opening %s.n", argv[1]);
}
if (( out = fopen(argv[2], "wb")) == NULL)
{
printf("Error opening %s.n", argv[2]);
}


while(( count = getc(in)) != EOF) 
{
count = count ^ *argv[3]; /* Apply XOR ( KEY ) */
bytes++; /* Increment counter of filesize */
putc(count, out); /* Write new file */
}

fclose(in);
fclose(out);
printf("Encryption Success:n");
printf("tEncrypted %s and stored data in %s.n", argv[1],argv[2]);
printf("tWrote %d bytes to %s.n", bytes,argv[2]);
return 0;
}

cilok!

[akuBest 0]

A'kum. deeja, cam penah tgk jer koding tuh. kalo tak silap aku ada satu tutorial yg kat internet tu kan? aku penah wat, tapi tak menjadik, tapik dah lama la... aku sajer nak menerai...

[Lasiaf 0]

Tima kasih suma..... aku akan berusaha... dapat aku bagitau.... ade presentation skang ni.... siut tul la sesat plak.... singgah jap kat lab ni... baru sekali ponteng..he he he he²³²²

[Lasiaf 0]

ok deejagothic... tima kasih atas kod tu.. aku dah try kat lab ni... guna Borland C++ v 5.01 tak salah aku la.. jadi... buat satu fail ntxe.cpp .. copy source dan compile... 3 warning message..

guna dos@cmd taip kat folder yang ade menatang ni...

ntxe nama_fail_yg_ko_nak_encryptkan nama_fail_baru 1-255

1-255 untuk xor...

kalo nak decryptkan... function sama....

10101<your text

01010<no encrypt<------

------- l

11111<encrypt l-----kena sama nombor....

v l

11111<encrypt text l

01010<no encrypt <----l

-------

10101<decrypt

[Lasiaf 0]

-------

Edited August 10, 2004 by Lasiaf

[raihan 0]

amik contoh encryption kat source muka depan login webpage yahoo mail

[Power 0]

Tima kasih suma..... aku akan berusaha... dapat aku bagitau.... ade presentation skang ni.... siut tul la sesat plak.... singgah jap kat lab ni... baru sekali ponteng..he he he he²³²²

hmmm.. kecoh laaa..

pi mengajo ker?

[didi7eleven 0]

cik Power pun ngajo gak ke