Exemplos de pkcs7 em Python

Exemplo n.º 1

Arquivo: cbc_ecb_oracle.py Projeto: Maxfield-Chen/nihliphobe-cryptopals

def offering(data):
    key = mc.srand(16)
    IV = mc.srand(16)
    pad = random.randint(5,10)
    offer = "A" * pad + data + "A" * pad
    if (random.randint(1,2)) == 1:
        print "CBC"
        return mc.encrypt_cbc(key, offer, IV).encode("hex")
    else:
        print "ECB"
        return mc.encrypt_ecb(key, mc.pkcs7(offer, 16)).encode("hex")

Exemplo n.º 2

Arquivo: cbc_ecb_oracle.py Projeto: Maxfield-Chen/nihliphobe-cryptopals

def offering(data):
    key = mc.srand(16)
    IV = mc.srand(16)
    pad = random.randint(5, 10)
    offer = "A" * pad + data + "A" * pad
    if (random.randint(1, 2)) == 1:
        print "CBC"
        return mc.encrypt_cbc(key, offer, IV).encode("hex")
    else:
        print "ECB"
        return mc.encrypt_ecb(key, mc.pkcs7(offer, 16)).encode("hex")

Exemplo n.º 3

Arquivo: pkcs7_validation.py Projeto: Maxfield-Chen/nihliphobe-cryptopals

def pkcs7_strip(data, n):
    if len(data) == 0:
        raise ValueError('Data cannot be null')
    fb = ord(data[-1])
    if len(data) < fb:
        raise ValueError('Data cannot be shorter than padding')
    split = ""
    ret = ""
    for i in xrange(len(data) - 1, len(data) - 1 - fb, -1):
        cur_char = data[i]
        if ord(cur_char) != fb:
            raise ValueError('Incorrect value found in padding')
        split += cur_char
    ret = data.split(split)[0]
    if mc.pkcs7(ret, n) != data:
        raise ValueError('Invalid Padding')
    return ret

Exemplo n.º 4

Arquivo: pkcs7_validation.py Projeto: Maxfield-Chen/nihliphobe-cryptopals

def pkcs7_strip(data, n):
    if len(data) == 0:
        raise ValueError('Data cannot be null')
    fb = ord(data[-1])
    if len(data) < fb:
        raise ValueError('Data cannot be shorter than padding')
    split = ""
    ret = ""
    for i in xrange(len(data)-1, len(data)-1-fb, -1):
        cur_char = data[i]
        if ord(cur_char) != fb:
            raise ValueError('Incorrect value found in padding')
        split += cur_char
    ret = data.split(split)[0]
    if mc.pkcs7(ret, n) != data:
        raise ValueError('Invalid Padding')
    return ret

Exemplo n.º 5

Arquivo: cbc.py Projeto: Maxfield-Chen/nihliphobe-cryptopals

def encrypt_cbc(key, data, IV):
    #print "ENCRYPT"
    KEYSIZE = len(IV)
    data = mc.pkcs7(data, KEYSIZE)
    num_blocks = len(data) / KEYSIZE
    fcb = ""
    for i in range(num_blocks):
        sb = i*KEYSIZE
        pb = data[sb:sb+KEYSIZE]
        #print "PB: ", pb.encode("hex"), len(pb)
        #print "IV: ",IV.encode("hex"), len(IV)
        npb = mc.xor_equalLen(pb.encode("hex"), IV.encode("hex"))
        #if (pb.encode("hex") != mc.xor_equalLen(npb, IV.encode("hex"))):
                #print "ENCRYPT XOR ERROR!"
        #print "NPB:", npb, len(npb.decode("hex"))
        ncb = mc.encrypt_ecb(key, npb.decode("hex"))
        #print "NCB:", ncb.encode("hex") 
        IV = ncb
        fcb += ncb
        #print fcb.encode("hex")
        #print "---"
    #print "FCB:",fcb.encode("hex")
    return fcb

Exemplo n.º 6

import mccrypto as mc


def parse_kv(data):
    data = data.split("&")
    pairs = {}
    for i in xrange(len(data)):
        kp = data[i].split("=")
        key = kp[0]
        val = kp[1]
        pairs[key] = val
    return pairs


key = mc.srand(16)
poison = mc.pkcs7("role=admin", 16)
email = "email=aaaaaaaaaa"
system = "&uid=0&role=user"
system1 = "&uid=1&role=user"
user = email + poison + system
enc_user = mc.encrypt_ecb(key, mc.pkcs7(user, 16))
treasure = enc_user[16:32]
admin = email + "A" * (16 - 7) + system1
e_admin = mc.encrypt_ecb(key, mc.pkcs7(admin, 16))
e_admin = e_admin[:32] + treasure

treasure_admin = mc.decrypt_ecb(key, e_admin)
print treasure_admin

Exemplo n.º 7

Arquivo: ecb_cp.py Projeto: Maxfield-Chen/nihliphobe-cryptopals

import mccrypto as mc

def parse_kv(data): 
    data = data.split("&")
    pairs = {}
    for i in xrange(len(data)):
        kp = data[i].split("=")
        key = kp[0]
        val = kp[1]
        pairs[key] = val
    return pairs

key = mc.srand(16)
poison = mc.pkcs7("role=admin", 16)
email = "email=aaaaaaaaaa"
system =  "&uid=0&role=user"
system1 = "&uid=1&role=user"
user = email + poison + system
enc_user = mc.encrypt_ecb(key, mc.pkcs7(user, 16))
treasure = enc_user[16:32]
admin = email + "A"*(16-7) + system1
e_admin = mc.encrypt_ecb(key, mc.pkcs7(admin, 16))
e_admin = e_admin[:32] + treasure

treasure_admin = mc.decrypt_ecb(key, e_admin)
print treasure_admin

Exemplo n.º 8

def offering(data, key):
    return mc.encrypt_ecb(key, mc.pkcs7(data, 16))

Exemplo n.º 9

Arquivo: hobaat_ecb_decrypt.py Projeto: Maxfield-Chen/nihliphobe-cryptopals

def offering(data, key):
    return mc.encrypt_ecb(key, mc.pkcs7(data, 16))