t_dec.py

It is an experimental testing for python M2Crypto module. M2Crypto is not well document. User may no

#!/usr/bin/env python

from M2Crypto import RSA, EVP, Rand
import time,sys

def decrypt(key, msg, padding):
    ptxt = key.private_decrypt(msg,padding)
    return ptxt

def test1(keyfn):
    key = RSA.load_key(keyfn)
    padding =RSA.pkcs1_oaep_padding
    for i in range(87):
        f=open('testv/cip%03d' % i,'rb')
        ctxt = f.read()
        f.close()
        fm=open('testv/msg%03d' % i, 'rb')
        msg = fm.read()
        fm.close()
        ptxt = decrypt(key,ctxt,padding)
        if msg != ptxt:
            print '%i %s ~ %s' % (i,msg,ptxt)
        else:
            print '%i ok' % i

def test2(keyfn):
    key = RSA.load_key(keyfn)
    padding =RSA.pkcs1_oaep_padding
    n=0
    loopx = True
    ctxts=[]
    for i in range(87):
        f=open('testv/cip%03d' % i,'rb')
        ctxts.append(f.read())
        f.close()
    t1 = time.time()
    print t1
    i=0
    while loopx:
        n+=1
        ptxt = key.private_decrypt(ctxts[i],padding)
        t2 = time.time()
        if t2-t1 >=10:
            loopx=False
            break
        i+=1
        if i> 86:
            i=0
    print t2
    print 'passed', t2-t1
    print 'number of decryption:', n
    return t2-t1, n

def loop_test2(keyfn):
    sum=0
    N=10
    for i in range(N):
        tx,n = test2(keyfn)
        sum +=n
        time.sleep(1)
    print 'average:', sum/N

if __name__=='__main__':
    keyfn = 'keys/svpvk.pem'
    #test1(keyfn)  # verify decrypt
    #test2(keyfn)  # check performance
    loop_test2(keyfn)