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basicswap_miserver/basicswap/contrib/blake256/blake256.py

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intro = """
blake.py
version 5, 2-Apr-2014
BLAKE is a SHA3 round-3 finalist designed and submitted by
Jean-Philippe Aumasson et al.
At the core of BLAKE is a ChaCha-like mixer, very similar
to that found in the stream cipher, ChaCha8. Besides being
a very good mixer, ChaCha is fast.
References:
http://www.131002.net/blake/
http://csrc.nist.gov/groups/ST/hash/sha-3/index.html
http://en.wikipedia.org/wiki/BLAKE_(hash_function)
This implementation assumes all data is in increments of
whole bytes. (The formal definition of BLAKE allows for
hashing individual bits.) Note too that this implementation
does include the round-3 tweaks where the number of rounds
was increased to 14/16 from 10/14.
This version can be imported into both Python2 (2.6 and 2.7)
and Python3 programs. Python 2.5 requires an older version
of blake.py (version 4).
Here are some comparative times for different versions of
Python:
64-bit:
2.6 6.284s
2.7 6.343s
3.2 7.620s
pypy (2.7) 2.080s
32-bit:
2.5 (32) 15.389s (with psyco)
2.7-32 13.645s
3.2-32 12.574s
One test on a 2.0GHz Core 2 Duo of 10,000 iterations of
BLAKE-256 on a short message produced a time of 5.7 seconds.
Not bad, but if raw speed is what you want, look to the
the C version. It is 40x faster and did the same thing
in 0.13 seconds.
Copyright (c) 2009-2012 by Larry Bugbee, Kent, WA
ALL RIGHTS RESERVED.
blake.py IS EXPERIMENTAL SOFTWARE FOR EDUCATIONAL
PURPOSES ONLY. IT IS MADE AVAILABLE "AS-IS" WITHOUT
WARRANTY OR GUARANTEE OF ANY KIND. USE SIGNIFIES
ACCEPTANCE OF ALL RISK.
To make your learning and experimentation less cumbersome,
blake.py is free for any use.
Enjoy,
Larry Bugbee
March 2011
rev May 2011 - fixed Python version check (tx JP)
rev Apr 2012 - fixed an out-of-order bit set in final()
- moved self-test to a separate test pgm
- this now works with Python2 and Python3
rev Apr 2014 - added test and conversion of string input
to byte string in update() (tx Soham)
- added hexdigest() method.
- now support state 3 so only one call to
final() per instantiation is allowed. all
subsequent calls to final(), digest() or
hexdigest() simply return the stored value.
"""
import struct
from binascii import hexlify, unhexlify
#---------------------------------------------------------------
class BLAKE(object):
# - - - - - - - - - - - - - - - - - - - - - - - - - - -
# initial values, constants and padding
# IVx for BLAKE-x
IV64 = [
0x6A09E667F3BCC908, 0xBB67AE8584CAA73B,
0x3C6EF372FE94F82B, 0xA54FF53A5F1D36F1,
0x510E527FADE682D1, 0x9B05688C2B3E6C1F,
0x1F83D9ABFB41BD6B, 0x5BE0CD19137E2179,
]
IV48 = [
0xCBBB9D5DC1059ED8, 0x629A292A367CD507,
0x9159015A3070DD17, 0x152FECD8F70E5939,
0x67332667FFC00B31, 0x8EB44A8768581511,
0xDB0C2E0D64F98FA7, 0x47B5481DBEFA4FA4,
]
# note: the values here are the same as the high-order
# half-words of IV64
IV32 = [
0x6A09E667, 0xBB67AE85,
0x3C6EF372, 0xA54FF53A,
0x510E527F, 0x9B05688C,
0x1F83D9AB, 0x5BE0CD19,
]
# note: the values here are the same as the low-order
# half-words of IV48
IV28 = [
0xC1059ED8, 0x367CD507,
0x3070DD17, 0xF70E5939,
0xFFC00B31, 0x68581511,
0x64F98FA7, 0xBEFA4FA4,
]
# constants for BLAKE-64 and BLAKE-48
C64 = [
0x243F6A8885A308D3, 0x13198A2E03707344,
0xA4093822299F31D0, 0x082EFA98EC4E6C89,
0x452821E638D01377, 0xBE5466CF34E90C6C,
0xC0AC29B7C97C50DD, 0x3F84D5B5B5470917,
0x9216D5D98979FB1B, 0xD1310BA698DFB5AC,
0x2FFD72DBD01ADFB7, 0xB8E1AFED6A267E96,
0xBA7C9045F12C7F99, 0x24A19947B3916CF7,
0x0801F2E2858EFC16, 0x636920D871574E69,
]
# constants for BLAKE-32 and BLAKE-28
# note: concatenate and the values are the same as the values
# for the 1st half of C64
C32 = [
0x243F6A88, 0x85A308D3,
0x13198A2E, 0x03707344,
0xA4093822, 0x299F31D0,
0x082EFA98, 0xEC4E6C89,
0x452821E6, 0x38D01377,
0xBE5466CF, 0x34E90C6C,
0xC0AC29B7, 0xC97C50DD,
0x3F84D5B5, 0xB5470917,
]
# the 10 permutations of:0,...15}
SIGMA = [
[ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15],
[14,10, 4, 8, 9,15,13, 6, 1,12, 0, 2,11, 7, 5, 3],
[11, 8,12, 0, 5, 2,15,13,10,14, 3, 6, 7, 1, 9, 4],
[ 7, 9, 3, 1,13,12,11,14, 2, 6, 5,10, 4, 0,15, 8],
[ 9, 0, 5, 7, 2, 4,10,15,14, 1,11,12, 6, 8, 3,13],
[ 2,12, 6,10, 0,11, 8, 3, 4,13, 7, 5,15,14, 1, 9],
[12, 5, 1,15,14,13, 4,10, 0, 7, 6, 3, 9, 2, 8,11],
[13,11, 7,14,12, 1, 3, 9, 5, 0,15, 4, 8, 6, 2,10],
[ 6,15,14, 9,11, 3, 0, 8,12, 2,13, 7, 1, 4,10, 5],
[10, 2, 8, 4, 7, 6, 1, 5,15,11, 9,14, 3,12,13, 0],
[ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15],
[14,10, 4, 8, 9,15,13, 6, 1,12, 0, 2,11, 7, 5, 3],
[11, 8,12, 0, 5, 2,15,13,10,14, 3, 6, 7, 1, 9, 4],
[ 7, 9, 3, 1,13,12,11,14, 2, 6, 5,10, 4, 0,15, 8],
[ 9, 0, 5, 7, 2, 4,10,15,14, 1,11,12, 6, 8, 3,13],
[ 2,12, 6,10, 0,11, 8, 3, 4,13, 7, 5,15,14, 1, 9],
[12, 5, 1,15,14,13, 4,10, 0, 7, 6, 3, 9, 2, 8,11],
[13,11, 7,14,12, 1, 3, 9, 5, 0,15, 4, 8, 6, 2,10],
[ 6,15,14, 9,11, 3, 0, 8,12, 2,13, 7, 1, 4,10, 5],
[10, 2, 8, 4, 7, 6, 1, 5,15,11, 9,14, 3,12,13, 0],
]
MASK32BITS = 0xFFFFFFFF
MASK64BITS = 0xFFFFFFFFFFFFFFFF
# - - - - - - - - - - - - - - - - - - - - - - - - - - -
def __init__(self, hashbitlen):
"""
load the hashSate structure (copy hashbitlen...)
hashbitlen: length of the hash output
"""
if hashbitlen not in [224, 256, 384, 512]:
raise Exception('hash length not 224, 256, 384 or 512')
self.hashbitlen = hashbitlen
self.h = [0]*8 # current chain value (initialized to the IV)
self.t = 0 # number of *BITS* hashed so far
self.cache = b'' # cached leftover data not yet compressed
self.salt = [0]*4 # salt (null by default)
self.state = 1 # set to 2 by update and 3 by final
self.nullt = 0 # Boolean value for special case \ell_i=0
# The algorithm is the same for both the 32- and 64- versions
# of BLAKE. The difference is in word size (4 vs 8 bytes),
# blocksize (64 vs 128 bytes), number of rounds (14 vs 16)
# and a few very specific constants.
if (hashbitlen == 224) or (hashbitlen == 256):
# setup for 32-bit words and 64-bit block
self.byte2int = self._fourByte2int
self.int2byte = self._int2fourByte
self.MASK = self.MASK32BITS
self.WORDBYTES = 4
self.WORDBITS = 32
self.BLKBYTES = 64
self.BLKBITS = 512
self.ROUNDS = 14 # was 10 before round 3
self.cxx = self.C32
self.rot1 = 16 # num bits to shift in G
self.rot2 = 12 # num bits to shift in G
self.rot3 = 8 # num bits to shift in G
self.rot4 = 7 # num bits to shift in G
self.mul = 0 # for 32-bit words, 32<<self.mul where self.mul = 0
# 224- and 256-bit versions (32-bit words)
if hashbitlen == 224:
self.h = self.IV28[:]
else:
self.h = self.IV32[:]
elif (hashbitlen == 384) or (hashbitlen == 512):
# setup for 64-bit words and 128-bit block
self.byte2int = self._eightByte2int
self.int2byte = self._int2eightByte
self.MASK = self.MASK64BITS
self.WORDBYTES = 8
self.WORDBITS = 64
self.BLKBYTES = 128
self.BLKBITS = 1024
self.ROUNDS = 16 # was 14 before round 3
self.cxx = self.C64
self.rot1 = 32 # num bits to shift in G
self.rot2 = 25 # num bits to shift in G
self.rot3 = 16 # num bits to shift in G
self.rot4 = 11 # num bits to shift in G
self.mul = 1 # for 64-bit words, 32<<self.mul where self.mul = 1
# 384- and 512-bit versions (64-bit words)
if hashbitlen == 384:
self.h = self.IV48[:]
else:
self.h = self.IV64[:]
# - - - - - - - - - - - - - - - - - - - - - - - - - - -
def _compress(self, block):
byte2int = self.byte2int
mul = self.mul # de-reference these for ...speed? ;-)
cxx = self.cxx
rot1 = self.rot1
rot2 = self.rot2
rot3 = self.rot3
rot4 = self.rot4
MASK = self.MASK
WORDBITS = self.WORDBITS
SIGMA = self.SIGMA
# get message (<<2 is the same as *4 but faster)
m = [byte2int(block[i<<2<<mul:(i<<2<<mul)+(4<<mul)]) for i in range(16)]
# initialization
v = [0]*16
v[ 0: 8] = [self.h[i] for i in range(8)]
v[ 8:16] = [self.cxx[i] for i in range(8)]
v[ 8:12] = [v[8+i] ^ self.salt[i] for i in range(4)]
if self.nullt == 0: # (i>>1 is the same as i/2 but faster)
v[12] = v[12] ^ (self.t & MASK)
v[13] = v[13] ^ (self.t & MASK)
v[14] = v[14] ^ (self.t >> self.WORDBITS)
v[15] = v[15] ^ (self.t >> self.WORDBITS)
# - - - - - - - - - - - - - - - - -
# ready? let's ChaCha!!!
def G(a, b, c, d, i):
va = v[a] # it's faster to deref and reref later
vb = v[b]
vc = v[c]
vd = v[d]
sri = SIGMA[round][i]
sri1 = SIGMA[round][i+1]
va = ((va + vb) + (m[sri] ^ cxx[sri1]) ) & MASK
x = vd ^ va
vd = (x >> rot1) | ((x << (WORDBITS-rot1)) & MASK)
vc = (vc + vd) & MASK
x = vb ^ vc
vb = (x >> rot2) | ((x << (WORDBITS-rot2)) & MASK)
va = ((va + vb) + (m[sri1] ^ cxx[sri]) ) & MASK
x = vd ^ va
vd = (x >> rot3) | ((x << (WORDBITS-rot3)) & MASK)
vc = (vc + vd) & MASK
x = vb ^ vc
vb = (x >> rot4) | ((x << (WORDBITS-rot4)) & MASK)
v[a] = va
v[b] = vb
v[c] = vc
v[d] = vd
for round in range(self.ROUNDS):
# column step
G( 0, 4, 8,12, 0)
G( 1, 5, 9,13, 2)
G( 2, 6,10,14, 4)
G( 3, 7,11,15, 6)
# diagonal step
G( 0, 5,10,15, 8)
G( 1, 6,11,12,10)
G( 2, 7, 8,13,12)
G( 3, 4, 9,14,14)
# - - - - - - - - - - - - - - - - -
# save current hash value (use i&0x3 to get 0,1,2,3,0,1,2,3)
self.h = [self.h[i]^v[i]^v[i+8]^self.salt[i&0x3]
for i in range(8)]
# print 'self.h', [num2hex(h) for h in self.h]
# - - - - - - - - - - - - - - - - - - - - - - - - - - -
def addsalt(self, salt):
""" adds a salt to the hash function (OPTIONAL)
should be called AFTER Init, and BEFORE update
salt: a bytestring, length determined by hashbitlen.
if not of sufficient length, the bytestring
will be assumed to be a big endian number and
prefixed with an appropriate number of null
bytes, and if too large, only the low order
bytes will be used.
if hashbitlen=224 or 256, then salt will be 16 bytes
if hashbitlen=384 or 512, then salt will be 32 bytes
"""
# fail if addsalt() was not called at the right time
if self.state != 1:
raise Exception('addsalt() not called after init() and before update()')
# salt size is to be 4x word size
saltsize = self.WORDBYTES * 4
# if too short, prefix with null bytes. if too long,
# truncate high order bytes
if len(salt) < saltsize:
salt = (chr(0)*(saltsize-len(salt)) + salt)
else:
salt = salt[-saltsize:]
# prep the salt array
self.salt[0] = self.byte2int(salt[ : 4<<self.mul])
self.salt[1] = self.byte2int(salt[ 4<<self.mul: 8<<self.mul])
self.salt[2] = self.byte2int(salt[ 8<<self.mul:12<<self.mul])
self.salt[3] = self.byte2int(salt[12<<self.mul: ])
# - - - - - - - - - - - - - - - - - - - - - - - - - - -
def update(self, data):
""" update the state with new data, storing excess data
as necessary. may be called multiple times and if a
call sends less than a full block in size, the leftover
is cached and will be consumed in the next call
data: data to be hashed (bytestring)
"""
self.state = 2
BLKBYTES = self.BLKBYTES # de-referenced for improved readability
BLKBITS = self.BLKBITS
datalen = len(data)
if not datalen: return
if type(data) == type(u''):
# use either of the next two lines for a proper
# response under both Python2 and Python3
data = data.encode('UTF-8') # converts to byte string
#data = bytearray(data, 'utf-8') # use if want mutable
# This next line works for Py3 but fails under
# Py2 because the Py2 version of bytes() will
# accept only *one* argument. Arrrrgh!!!
#data = bytes(data, 'utf-8') # converts to immutable byte
# string but... under p7
# bytes() wants only 1 arg
# ...a dummy, 2nd argument like encoding=None
# that does nothing would at least allow
# compatibility between Python2 and Python3.
left = len(self.cache)
fill = BLKBYTES - left
# if any cached data and any added new data will fill a
# full block, fill and compress
if left and datalen >= fill:
self.cache = self.cache + data[:fill]
self.t += BLKBITS # update counter
self._compress(self.cache)
self.cache = b''
data = data[fill:]
datalen -= fill
# compress new data until not enough for a full block
while datalen >= BLKBYTES:
self.t += BLKBITS # update counter
self._compress(data[:BLKBYTES])
data = data[BLKBYTES:]
datalen -= BLKBYTES
# cache all leftover bytes until next call to update()
if datalen > 0:
self.cache = self.cache + data[:datalen]
# - - - - - - - - - - - - - - - - - - - - - - - - - - -
def final(self, data=''):
""" finalize the hash -- pad and hash remaining data
returns hashval, the digest
"""
if self.state == 3:
# we have already finalized so simply return the
# previously calculated/stored hash value
return self.hash
if data:
self.update(data)
ZZ = b'\x00'
ZO = b'\x01'
OZ = b'\x80'
OO = b'\x81'
PADDING = OZ + ZZ*128 # pre-formatted padding data
# copy nb. bits hash in total as a 64-bit BE word
# copy nb. bits hash in total as a 128-bit BE word
tt = self.t + (len(self.cache) << 3)
if self.BLKBYTES == 64:
msglen = self._int2eightByte(tt)
else:
low = tt & self.MASK
high = tt >> self.WORDBITS
msglen = self._int2eightByte(high) + self._int2eightByte(low)
# size of block without the words at the end that count
# the number of bits, 55 or 111.
# Note: (((self.WORDBITS/8)*2)+1) equals ((self.WORDBITS>>2)+1)
sizewithout = self.BLKBYTES - ((self.WORDBITS>>2)+1)
if len(self.cache) == sizewithout:
# special case of one padding byte
self.t -= 8
if self.hashbitlen in [224, 384]:
self.update(OZ)
else:
self.update(OO)
else:
if len(self.cache) < sizewithout:
# enough space to fill the block
# use t=0 if no remaining data
if len(self.cache) == 0:
self.nullt=1
self.t -= (sizewithout - len(self.cache)) << 3
self.update(PADDING[:sizewithout - len(self.cache)])
else:
# NOT enough space, need 2 compressions
# ...add marker, pad with nulls and compress
self.t -= (self.BLKBYTES - len(self.cache)) << 3
self.update(PADDING[:self.BLKBYTES - len(self.cache)])
# ...now pad w/nulls leaving space for marker & bit count
self.t -= (sizewithout+1) << 3
self.update(PADDING[1:sizewithout+1]) # pad with zeroes
self.nullt = 1 # raise flag to set t=0 at the next _compress
# append a marker byte
if self.hashbitlen in [224, 384]:
self.update(ZZ)
else:
self.update(ZO)
self.t -= 8
# append the number of bits (long long)
self.t -= self.BLKBYTES
self.update(msglen)
hashval = []
if self.BLKBYTES == 64:
for h in self.h:
hashval.append(self._int2fourByte(h))
else:
for h in self.h:
hashval.append(self._int2eightByte(h))
self.hash = b''.join(hashval)[:self.hashbitlen >> 3]
self.state = 3
return self.hash
digest = final # may use digest() as a synonym for final()
# - - - - - - - - - - - - - - - - - - - - - - - - - - -
def hexdigest(self, data=''):
return hexlify(self.final(data)).decode('UTF-8')
# - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
# utility functions
def _fourByte2int(self, bytestr): # see also long2byt() below
""" convert a 4-byte string to an int (long) """
return struct.unpack('!L', bytestr)[0]
def _eightByte2int(self, bytestr):
""" convert a 8-byte string to an int (long long) """
return struct.unpack('!Q', bytestr)[0]
def _int2fourByte(self, x): # see also long2byt() below
""" convert a number to a 4-byte string, high order
truncation possible (in Python x could be a BIGNUM)
"""
return struct.pack('!L', x)
def _int2eightByte(self, x):
""" convert a number to a 8-byte string, high order
truncation possible (in Python x could be a BIGNUM)
"""
return struct.pack('!Q', x)
#---------------------------------------------------------------
#---------------------------------------------------------------
#---------------------------------------------------------------
def blake_hash(data):
return BLAKE(256).digest(data)