nano9911/aes128_c-posix

AES-128 implementation in C/POSIX, multi-threaded using <pthread.h>. Still learning, looking for your feedbacks.

AES128

AES-128 [ECB && CTR] Modes implementation in C/POSIX, multi-threaded using <pthread.h>.

Threads:

read : read state [16 Bytes] from file to buffer1. [Producer]

ecb_encrypt || ecb_decrypt || ctr_encrypt || ctr_decrypt : read state [16 Bytes] from buffer, operate on it, then move it to buffer2 [Producer & Consumer]

write: read state [16 Bytes] from buffer2, write it to the output file [Consumer]

Threads are oganised to work in parallel, producer consumer method, and synchronised using mutex lock.

Still learning, looking for your feedbacks.

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Usage:

To compile: gcc -pthread AES.c -o [output filename/path]

Command line Arguments:

argv[1] = "-ecb" [use ECB mode] || "-ctr" [use CTR mode]

argv[2] = "-e" [Encrypt argv[3]] || "-d" [Decrypt argv[3]]

argv[3] = input file name

argv[4] = "-k"

argv[5] = "r" [Generate Random Key] || key file name

If argv[1] = "-ctr" : argv[6] = "-iv" argv[7] = "r" [Generate random IV] || IV file name

Output:

if argv[2] == "-e" --> cipher_aes.ecrypted else if argv[2] == "-d" --> plain.decrypted

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Example:

gcc -pthread AES.c -o aes

aes -ecb -e plain.txt -k key.txt

aes -ecb -d cipher.txt -k key.txt

aes -ctr -e plain.txt -k key.txt -iv IV.txt

aes -ctr -d encrypted.aes -k key.txt -iv IV.txt