Example #1
0
import t

#    01234567890123
s = "this is a test of ctr encryption and editing that's long enough to roll the ctr a couple of times and that."
s1 = "this is a TEST of ctr encryption and editing that's long enough to roll the ctr a couple of times and that."
k = "yellow submarine"
e = t.encrypt_aes_128_ctr(s, k)
e1 = t.edit_ctr_stream(e, 10, "TEST", k)
assert t.decrypt_aes_128_ctr(e1, k) == s1

F = open('25.txt', 'r')
s = ''.join(F.readlines()).replace('\r', '').replace('\n', '')
F.close()
s = t.decrypt_aes_128_ecb(t.base64_to_str(s), "YELLOW SUBMARINE")
o = t.CTRVictim(s, t.random_aes_key())

# use edit() to replace whole file with AAAA
original_cipher = o.get_ciphertext()
o.edit(0, "A" * len(original_cipher))

# xor ciphertext with AAAA to get encrypted keystream
keystream = t.fixed_xor(o.get_ciphertext(), "A" * len(original_cipher))

# xor encrypted keystream with original ciphertext to get plaintext
plaintext = t.fixed_xor(keystream, original_cipher)

print plaintext
assert plaintext == s
Example #2
0
import t

F = open('20.txt', 'r')
data = F.readlines()
F.close()

key = t.random_aes_key()

r = [t.encrypt_aes_128_ctr(t.base64_to_str(d.replace('\r', '').replace('\n', '')), key) for d in data]

s = t.defeat_fixed_nonce_ctr_stats(r)

print '\n'.join(s)

print len(s)
Example #3
0
import t

secret = t.base64_to_str(
    "Um9sbGluJyBpbiBteSA1LjAKV2l0aCBteSByYWctdG9wIGRvd24gc28gbXkgaGFpciBjYW4gYmxvdwpUaGUgZ2lybGllcyBvbiBzdGFuZGJ5IHdhdmluZyBqdXN0IHRvIHNheSBoaQpEaWQgeW91IHN0b3A/IE5vLCBJIGp1c3QgZHJvdmUgYnkK"
)

print t.defeat_ecb_fixed_key_with_oracle(secret)
Example #4
0
import t
secret = t.base64_to_str("Um9sbGluJyBpbiBteSA1LjAKV2l0aCBteSByYWctdG9wIGRvd24gc28gbXkgaGFpciBjYW4gYmxvdwpUaGUgZ2lybGllcyBvbiBzdGFuZGJ5IHdhdmluZyBqdXN0IHRvIHNheSBoaQpEaWQgeW91IHN0b3A/IE5vLCBJIGp1c3QgZHJvdmUgYnkK")

print t.defeat_ecb_fixed_key_with_oracle(secret)
Example #5
0
    "MDAwMDAxV2l0aCB0aGUgYmFzcyBraWNrZWQgaW4gYW5kIHRoZSBWZWdhJ3MgYXJlIHB1bXBpbic=",
    "MDAwMDAyUXVpY2sgdG8gdGhlIHBvaW50LCB0byB0aGUgcG9pbnQsIG5vIGZha2luZw==",
    "MDAwMDAzQ29va2luZyBNQydzIGxpa2UgYSBwb3VuZCBvZiBiYWNvbg==",
    "MDAwMDA0QnVybmluZyAnZW0sIGlmIHlvdSBhaW4ndCBxdWljayBhbmQgbmltYmxl",
    "MDAwMDA1SSBnbyBjcmF6eSB3aGVuIEkgaGVhciBhIGN5bWJhbA==",
    "MDAwMDA2QW5kIGEgaGlnaCBoYXQgd2l0aCBhIHNvdXBlZCB1cCB0ZW1wbw==",
    "MDAwMDA3SSdtIG9uIGEgcm9sbCwgaXQncyB0aW1lIHRvIGdvIHNvbG8=",
    "MDAwMDA4b2xsaW4nIGluIG15IGZpdmUgcG9pbnQgb2g=",
    "MDAwMDA5aXRoIG15IHJhZy10b3AgZG93biBzbyBteSBoYWlyIGNhbiBibG93"
]

iv = t.random_aes_key()

s = t.encrypt_random_cbc(data, iv)

assert t.check_cbc_padding(s, iv), "oops"

r = t.defeat_cbc_padding_oracle(s, iv)

print repr(r)
print t.base64_to_str(r)

out = []
for d in data:
    iv = t.random_aes_key()
    s = t.encrypt_random_cbc([d], iv)
    out.append(t.base64_to_str(t.defeat_cbc_padding_oracle(s, iv)))

out.sort()
print '\n'.join(out)
Example #6
0
import t

s = "L77na/nrFsKvynd6HzOoG7GHTLXsTVu9qvY/2syLXzhPweyyMTJULu/6/kXX0KSvoOLSFQ=="

r = t.decrypt_aes_128_ctr(t.base64_to_str(s), "YELLOW SUBMARINE")

print r
Example #7
0
data = [ "MDAwMDAwTm93IHRoYXQgdGhlIHBhcnR5IGlzIGp1bXBpbmc=",
         "MDAwMDAxV2l0aCB0aGUgYmFzcyBraWNrZWQgaW4gYW5kIHRoZSBWZWdhJ3MgYXJlIHB1bXBpbic=",
         "MDAwMDAyUXVpY2sgdG8gdGhlIHBvaW50LCB0byB0aGUgcG9pbnQsIG5vIGZha2luZw==",
         "MDAwMDAzQ29va2luZyBNQydzIGxpa2UgYSBwb3VuZCBvZiBiYWNvbg==",
         "MDAwMDA0QnVybmluZyAnZW0sIGlmIHlvdSBhaW4ndCBxdWljayBhbmQgbmltYmxl",
         "MDAwMDA1SSBnbyBjcmF6eSB3aGVuIEkgaGVhciBhIGN5bWJhbA==",
         "MDAwMDA2QW5kIGEgaGlnaCBoYXQgd2l0aCBhIHNvdXBlZCB1cCB0ZW1wbw==",
         "MDAwMDA3SSdtIG9uIGEgcm9sbCwgaXQncyB0aW1lIHRvIGdvIHNvbG8=",
         "MDAwMDA4b2xsaW4nIGluIG15IGZpdmUgcG9pbnQgb2g=",
         "MDAwMDA5aXRoIG15IHJhZy10b3AgZG93biBzbyBteSBoYWlyIGNhbiBibG93" ]

iv = t.random_aes_key()

s = t.encrypt_random_cbc(data, iv)

assert t.check_cbc_padding(s, iv), "oops"

r = t.defeat_cbc_padding_oracle(s, iv)

print repr(r)
print t.base64_to_str(r)

out = []
for d in data:
    iv = t.random_aes_key()
    s = t.encrypt_random_cbc([d], iv)
    out.append(t.base64_to_str(t.defeat_cbc_padding_oracle(s, iv)))

out.sort()
print '\n'.join(out)
Example #8
0
    "U2hlIHJvZGUgdG8gaGFycmllcnM/",
    "VGhpcyBtYW4gaGFkIGtlcHQgYSBzY2hvb2w=",
    "QW5kIHJvZGUgb3VyIHdpbmdlZCBob3JzZS4=",
    "VGhpcyBvdGhlciBoaXMgaGVscGVyIGFuZCBmcmllbmQ=",
    "V2FzIGNvbWluZyBpbnRvIGhpcyBmb3JjZTs=",
    "SGUgbWlnaHQgaGF2ZSB3b24gZmFtZSBpbiB0aGUgZW5kLA==",
    "U28gc2Vuc2l0aXZlIGhpcyBuYXR1cmUgc2VlbWVkLA==",
    "U28gZGFyaW5nIGFuZCBzd2VldCBoaXMgdGhvdWdodC4=",
    "VGhpcyBvdGhlciBtYW4gSSBoYWQgZHJlYW1lZA==",
    "QSBkcnVua2VuLCB2YWluLWdsb3Jpb3VzIGxvdXQu",
    "SGUgaGFkIGRvbmUgbW9zdCBiaXR0ZXIgd3Jvbmc=",
    "VG8gc29tZSB3aG8gYXJlIG5lYXIgbXkgaGVhcnQs",
    "WWV0IEkgbnVtYmVyIGhpbSBpbiB0aGUgc29uZzs=",
    "SGUsIHRvbywgaGFzIHJlc2lnbmVkIGhpcyBwYXJ0",
    "SW4gdGhlIGNhc3VhbCBjb21lZHk7",
    "SGUsIHRvbywgaGFzIGJlZW4gY2hhbmdlZCBpbiBoaXMgdHVybiw=",
    "VHJhbnNmb3JtZWQgdXR0ZXJseTo=",
    "QSB0ZXJyaWJsZSBiZWF1dHkgaXMgYm9ybi4="
]
key = t.random_aes_key()

r = [t.encrypt_aes_128_ctr(t.base64_to_str(d), key) for d in data]

# why don't i just take the first block of each and treat as 40 blocks of repeating key xor ? ...
s = t.defeat_fixed_nonce_ctr(r)

print s

print len(s)
Example #9
0
import t

F = open('20.txt', 'r')
data = F.readlines()
F.close()

key = t.random_aes_key()

r = [
    t.encrypt_aes_128_ctr(
        t.base64_to_str(d.replace('\r', '').replace('\n', '')), key)
    for d in data
]

s = t.defeat_fixed_nonce_ctr_stats(r)

print '\n'.join(s)

print len(s)