Generates pseudo-randomly generated numbers.
For the mDES implementation:
$./PRNG-CTR-mDES 100 outfile_mdes 1f 5
Pad: 4
#Blocks: 13
Key: 0x1F
Nonce: 5
IV: 0x5E
| Arguments | Description |
|---|---|
| 100 | Number of pseudo-random bits to produce |
| outfile_mdes | Name of the file to write the output to |
| 1f | Encryption key to use in hex |
| 5 | Nonce to use (optional) |
This produces:
$ cat outfile_mdes
10110110
00101110
01000101
11111001
01000101
00001111
00000111
00101001
11001000
01011101
11101000
00111101
0101
Notice the truncated last block. This is a product of the use of a block cipher of size 8 (mDES) - the last block has been truncated by 4 bits so the output is exactly 100 bits, as was specified in the input.
For the sAES implementation:
$ ./PRNG-CTR-sAES 100 outfile_saes 1fe5 5
Pad: 4
#Blocks: 7
Key: 0x1FE5
Nonce: 5
IV: 0x32EE
The arguments are:
| Arguments | Description |
|---|---|
| 100 | Number of pseudo-random bits to produce |
| outfile_saes | Name of the file to write the output to |
| 1fe5 | Encryption key to use in hex |
| 5 | Nonce to use (optional) |
This produces:
$ cat outfile_saes
0100111111001011
0001101101001010
0110011010110001
0100101011100100
1000011000000111
0100101110100100
000100101000
Again, notice the truncated last block. Is has again been shortened to produce exactly 100 bits of output.