def decrypt(self, data, ciphername='aes-256-cbc'):
"""
Decrypt data with ECIES method using the local private key
"""
blocksize = OpenSSL.get_cipher(ciphername).get_blocksize()
iv = data[:blocksize]
i = blocksize
curve, pubkey_x, pubkey_y, i2 = ECC._decode_pubkey(data[i:])
i += i2
ciphertext = data[i:len(data) - 32]
i += len(ciphertext)
mac = data[i:]
key = sha512(self.raw_get_ecdh_key(pubkey_x, pubkey_y)).digest()
key_e, key_m = key[:32], key[32:]
"""
pyelliptic was changed slightly so that the hmac covers the
iv and pubkey. So let's have an upgrade period where we support
both the old and the new hmac'ing algorithms.
https://github.com/yann2192/pyelliptic/issues/17
"""
if hmac_sha256(key_m, ciphertext) != mac:
if hmac_sha256(key_m, data[:len(data) - 32]) != mac:
raise RuntimeError("Fail to verify data")
ctx = Cipher(key_e, iv, 0, ciphername)
return ctx.ciphering(ciphertext)
def decrypt(self, data, ciphername="aes-256-cbc"):
"""
Decrypt data with ECIES method using the local private key
"""
blocksize = OpenSSL.get_cipher(ciphername).get_blocksize()
iv = data[:blocksize]
i = blocksize
curve, pubkey_x, pubkey_y, i2 = ECC._decode_pubkey(data[i:])
i += i2
ciphertext = data[i : len(data) - 32]
i += len(ciphertext)
mac = data[i:]
key = sha512(self.raw_get_ecdh_key(pubkey_x, pubkey_y)).digest()
key_e, key_m = key[:32], key[32:]
"""
pyelliptic was changed slightly so that the hmac covers the
iv and pubkey. So let's have an upgrade period where we support
both the old and the new hmac'ing algorithms.
https://github.com/yann2192/pyelliptic/issues/17
"""
if hmac_sha256(key_m, ciphertext) != mac:
if hmac_sha256(key_m, data[: len(data) - 32]) != mac:
raise RuntimeError("Fail to verify data")
ctx = Cipher(key_e, iv, 0, ciphername)
return ctx.ciphering(ciphertext)
def raw_encrypt(data,
pubkey_x,
pubkey_y,
curve='sect283r1',
ephemcurve=None,
ciphername='aes-256-cbc'):
if ephemcurve is None:
ephemcurve = curve
ephem = ECC(curve=ephemcurve)
key = sha512(ephem.raw_get_ecdh_key(pubkey_x, pubkey_y)).digest()
key_e, key_m = key[:32], key[32:]
pubkey = ephem.get_pubkey()
iv = OpenSSL.rand(OpenSSL.get_cipher(ciphername).get_blocksize())
ctx = Cipher(key_e, iv, 1, ciphername)
import time
if int(time.time()) < 1416175200: # Sun, 16 Nov 2014 22:00:00 GMT
ciphertext = ctx.ciphering(data)
else:
ciphertext = iv + pubkey + ctx.ciphering(
data
) # Everyone should be using this line after the Bitmessage protocol v3 upgrade period
mac = hmac_sha256(key_m, ciphertext)
if int(time.time()) < 1416175200: # Sun, 16 Nov 2014 22:00:00 GMT
return iv + pubkey + ciphertext + mac
else:
return ciphertext + mac # Everyone should be using this line after the Bitmessage protocol v3 upgrade period
def raw_encrypt(data, pubkey_x, pubkey_y, curve='sect283r1',
ephemcurve=None, ciphername='aes-256-cbc'):
if ephemcurve is None:
ephemcurve = curve
ephem = ECC(curve=ephemcurve)
key = sha512(ephem.raw_get_ecdh_key(pubkey_x, pubkey_y)).digest()
key_e, key_m = key[:32], key[32:]
pubkey = ephem.get_pubkey()
iv = OpenSSL.rand(OpenSSL.get_cipher(ciphername).get_blocksize())
ctx = Cipher(key_e, iv, 1, ciphername)
ciphertext = ctx.ciphering(data)
mac = hmac_sha256(key_m, ciphertext)
return iv + pubkey + ciphertext + mac
def raw_encrypt(data, pubkey_x, pubkey_y, curve="sect283r1", ephemcurve=None, ciphername="aes-256-cbc"):
if ephemcurve is None:
ephemcurve = curve
ephem = ECC(curve=ephemcurve)
key = sha512(ephem.raw_get_ecdh_key(pubkey_x, pubkey_y)).digest()
key_e, key_m = key[:32], key[32:]
pubkey = ephem.get_pubkey()
iv = OpenSSL.rand(OpenSSL.get_cipher(ciphername).get_blocksize())
ctx = Cipher(key_e, iv, 1, ciphername)
ciphertext = ctx.ciphering(data)
# ciphertext = iv + pubkey + ctx.ciphering(data) # We will switch to this line after an upgrade period
mac = hmac_sha256(key_m, ciphertext)
return iv + pubkey + ciphertext + mac
def raw_encrypt(data,
pubkey_x,
pubkey_y,
curve='sect283r1',
ephemcurve=None,
ciphername='aes-256-cbc'):
if ephemcurve is None:
ephemcurve = curve
ephem = ECC(curve=ephemcurve)
key = sha512(ephem.raw_get_ecdh_key(pubkey_x, pubkey_y)).digest()
key_e, key_m = key[:32], key[32:]
pubkey = ephem.get_pubkey()
iv = OpenSSL.rand(OpenSSL.get_cipher(ciphername).get_blocksize())
ctx = Cipher(key_e, iv, 1, ciphername)
ciphertext = iv + pubkey + ctx.ciphering(data)
mac = hmac_sha256(key_m, ciphertext)
return ciphertext + mac
def decrypt(self, data, ciphername='aes-256-cbc'):
"""
Decrypt data with ECIES method using the local private key
"""
blocksize = OpenSSL.get_cipher(ciphername).get_blocksize()
iv = data[:blocksize]
i = blocksize
curve, pubkey_x, pubkey_y, i2 = ECC._decode_pubkey(data[i:])
i += i2
ciphertext = data[i:len(data) - 32]
i += len(ciphertext)
mac = data[i:]
key = sha512(self.raw_get_ecdh_key(pubkey_x, pubkey_y)).digest()
key_e, key_m = key[:32], key[32:]
if not equals(hmac_sha256(key_m, data[:len(data) - 32]), mac):
raise RuntimeError("Fail to verify data")
ctx = Cipher(key_e, iv, 0, ciphername)
return ctx.ciphering(ciphertext)
def decrypt(self, data, ciphername='aes-256-cbc'):
"""
Decrypt data with ECIES method using the local private key
"""
blocksize = OpenSSL.get_cipher(ciphername).get_blocksize()
iv = data[:blocksize]
i = blocksize
curve, pubkey_x, pubkey_y, i2 = ECC._decode_pubkey(data[i:])
i += i2
ciphertext = data[i:len(data)-32]
i += len(ciphertext)
mac = data[i:]
key = sha512(self.raw_get_ecdh_key(pubkey_x, pubkey_y)).digest()
key_e, key_m = key[:32], key[32:]
if hmac_sha256(key_m, ciphertext) != mac:
raise RuntimeError("Fail to verify data")
ctx = Cipher(key_e, iv, 0, ciphername)
return ctx.ciphering(ciphertext)
def raw_encrypt(
data,
pubkey_x,
pubkey_y,
curve='sect283r1',
ephemcurve=None,
ciphername='aes-256-cbc',
): # pylint: disable=too-many-arguments
"""ECHD encryption, keys supplied in binary data format"""
if ephemcurve is None:
ephemcurve = curve
ephem = ECC(curve=ephemcurve)
key = sha512(ephem.raw_get_ecdh_key(pubkey_x, pubkey_y)).digest()
key_e, key_m = key[:32], key[32:]
pubkey = ephem.get_pubkey()
iv = OpenSSL.rand(OpenSSL.get_cipher(ciphername).get_blocksize())
ctx = Cipher(key_e, iv, 1, ciphername)
ciphertext = iv + pubkey + ctx.ciphering(data)
mac = hmac_sha256(key_m, ciphertext)
return ciphertext + mac
def raw_encrypt(data, pubkey_x, pubkey_y, curve="sect283r1", ephemcurve=None, ciphername="aes-256-cbc"):
if ephemcurve is None:
ephemcurve = curve
ephem = ECC(curve=ephemcurve)
key = sha512(ephem.raw_get_ecdh_key(pubkey_x, pubkey_y)).digest()
key_e, key_m = key[:32], key[32:]
pubkey = ephem.get_pubkey()
iv = OpenSSL.rand(OpenSSL.get_cipher(ciphername).get_blocksize())
ctx = Cipher(key_e, iv, 1, ciphername)
import time
if int(time.time()) < 1416175200: # Sun, 16 Nov 2014 22:00:00 GMT
ciphertext = ctx.ciphering(data)
else:
ciphertext = (
iv + pubkey + ctx.ciphering(data)
) # Everyone should be using this line after the Bitmessage protocol v3 upgrade period
mac = hmac_sha256(key_m, ciphertext)
if int(time.time()) < 1416175200: # Sun, 16 Nov 2014 22:00:00 GMT
return iv + pubkey + ciphertext + mac
else:
return (
ciphertext + mac
) # Everyone should be using this line after the Bitmessage protocol v3 upgrade period