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encrypt.py
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encrypt.py
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from encoder import D8Key
from util import Reader
import nacl.secret
import nacl.utils
import nacl.encoding
import sys, time
def get_key(keyfile):
return Reader.read(keyfile, joiner='')
def get_number(numfile):
return Reader.read(numfile, joiner='')
def get_nonce(noncefile):
return Reader.read(noncefile, joiner='')
def get_msg(msgfile):
return Reader.read(msgfile)
def format_d8key(d8key):
i = 0
r = ''
while i < len(d8key):
row = d8key[i:i+14]
r += ' '.join(list(row)) + '\n'
i = i + 14
return r
def encrypt(key, number, nonce, msg):
box = nacl.secret.SecretBox(key, D8Key())
if len(nonce) == 0:
nonce = nacl.utils.random(nacl.secret.SecretBox.NONCE_SIZE)
msg += "\n----\nkey # %s used on (%s):\n%s\n" % \
(' '.join(list(number)), time.strftime("%c"), format_d8key(key))
return "key # %s\n" % ' '.join(list(number)) + \
nacl.encoding.HexEncoder.encode(box.encrypt(msg, nonce))
if __name__ == "__main__":
if len(sys.argv) < 5:
print >> sys.stderr, "usage: encrypt.py <key file> <key # file> <nonce file> <msg file>"
sys.exit(1)
key = get_key(sys.argv[1])
num = get_number(sys.argv[2])
nonce = get_nonce(sys.argv[3])
msg = get_msg(sys.argv[4])
print >> sys.stdout, encrypt(key, num, nonce, msg)