encryption - C# Have user input string to a key DES -

encryption - C# Have user input string to a key DES -

in c# programme encrypting/decrypting files. copied code microsoft website toy , dissect it. i'm asking if of know how have pre-determined string deed key encryption/decryption.

in main method:

string ssecretkey; ssecretkey = generatekey();

generatekey:

static string generatekey() { descryptoserviceprovider descrypto = (descryptoserviceprovider) descryptoserviceprovider.create(); homecoming asciiencoding.ascii.getstring(descrypto.key); }

this in encrypt , decrypt function: have no thought do

des.key = asciiencoding.ascii.getbytes(skey); des.iv = asciiencoding.ascii.getbytes(skey);

this sort of depends on want do. in next line...

asciiencoding.ascii.getstring(descrypto.key);

you fetching ascii representation of automatically generated key encryption object. property des.key though, has both public set , public get, can do:

// set key pre-determined set of bytes (of length 8): descrypto.key = new byte[] {0x4b, 0x4a, 0x41, 0x52, 0x54, 0x41, 0x4e, 0x21};

ofcourse value of this, when next line decodes descrypto.key string, bytes "decoded" hex more readable ascii characters (assuming you've provided meaningful hex values begin with, ofcourse).

c# encryption key des