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✏️ md5driver.py

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import string
import md5
from sys import argv

def MDPrint(str):
    outstr = ''
    for i in str:
        o = ord(i)
        outstr = (outstr
                  + string.hexdigits[(o >> 4) & 0xF]
                  + string.hexdigits[o & 0xF])
    print outstr,

from time import time

def makestr(start, end):
    result = ''
    for i in range(start, end + 1):
        result = result + chr(i)

return result

def MDTimeTrial():
    TEST_BLOCK_SIZE = 1000
    TEST_BLOCKS = 10000

TEST_BYTES = TEST_BLOCK_SIZE * TEST_BLOCKS

# initialize test data, need temporary string filler

filsiz = 1 << 8
    filler = makestr(0, filsiz-1)
    data = filler * (TEST_BLOCK_SIZE // filsiz)
    data = data + filler[:(TEST_BLOCK_SIZE % filsiz)]

del filsiz, filler

# start timer
    print 'MD5 time trial. Processing', TEST_BYTES, 'characters...'
    t1 = time()

mdContext = md5.new()

for i in range(TEST_BLOCKS):
        mdContext.update(data)

str = mdContext.digest()
    t2 = time()

MDPrint(str)
    print 'is digest of test input.'
    print 'Seconds to process test input:', t2 - t1
    print 'Characters processed per second:', TEST_BYTES / (t2 - t1)

def MDString(str):
    MDPrint(md5.new(str).digest())
    print '"' + str + '"'

def MDFile(filename):
    f = open(filename, 'rb')
    mdContext = md5.new()

while 1:
        data = f.read(1024)
        if not data:
            break
        mdContext.update(data)

MDPrint(mdContext.digest())
    print filename

import sys

def MDFilter():
    mdContext = md5.new()

while 1:
        data = sys.stdin.read(16)
        if not data:
            break
        mdContext.update(data)

MDPrint(mdContext.digest())
    print

def MDTestSuite():
    print 'MD5 test suite results:'
    MDString('')
    MDString('a')
    MDString('abc')
    MDString('message digest')
    MDString(makestr(ord('a'), ord('z')))
    MDString(makestr(ord('A'), ord('Z'))
              + makestr(ord('a'), ord('z'))
              + makestr(ord('0'), ord('9')))
    MDString((makestr(ord('1'), ord('9')) + '0') * 8)

# Contents of file foo are "abc"
    MDFile('foo')

# I don't wanna use getopt(), since I want to use the same i/f...
def main():
    if len(argv) == 1:
        MDFilter()
    for arg in argv[1:]:
        if arg[:2] == '-s':
            MDString(arg[2:])
        elif arg == '-t':
            MDTimeTrial()
        elif arg == '-x':
            MDTestSuite()
        else:
            MDFile(arg)

main()

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✏️ md5driver.py