class SHA1(object):
def __init__(self, version=1):
self.size = 160
self.blocksize = 512
self.wsize = 32
assert version in (0, 1)
self.version = version
# set functions and constants:
self.ft = [Ch] * 20 + [Parity] * 20 + [Maj] * 20 + [Parity] * 20
self.K = [0x5a827999]*20 +\
[0x6ed9eba1]*20 +\
[0x8f1bbcdc]*20 +\
[0xca62c1d6]*20
self.initstate()
def initstate(self):
H = [0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476, 0xc3d2e1f0]
self.H = [Bits(v, self.wsize) for v in H]
self.padmethod = SHApadding(self.blocksize, self.wsize)
def iterblocks(self, M, bitlen=None, padding=False):
osize = self.blocksize // 8
fmt = '>16L' if self.wsize == 32 else '>16Q'
for B in self.padmethod.iterblocks(M, bitlen=bitlen, padding=padding):
W = struct.unpack(fmt, B)
yield [Bits(w, self.wsize) for w in W]
def __call__(self, M, bitlen=None):
self.initstate()
return self.update(M, bitlen=bitlen, padding=True)
def update(self, M, bitlen=None, padding=False):
for W in self.iterblocks(M, bitlen=bitlen, padding=padding):
a, b, c, d, e = self.H
assert len(W) == 16
for t in range(16, 80):
w = rol(W[t - 3] ^ W[t - 8] ^ W[t - 14] ^ W[t - 16],
self.version)
W.append(w)
for r in range(80):
T = rol(a, 5) + self.ft[r](b, c, d) + e + self.K[r] + W[r]
e = d
d = c
c = rol(b, 30)
b = a
a = T
self.H[0] += a
self.H[1] += b
self.H[2] += c
self.H[3] += d
self.H[4] += e
return b''.join([pack(h, '>L') for h in self.H])
class SHA1(object):
def __init__(self,version=1):
self.size = 160
self.blocksize = 512
self.wsize = 32
assert version in (0,1)
self.version = version
# set functions and constants:
self.ft = [Ch]*20+[Parity]*20+[Maj]*20+[Parity]*20
self.K = [0x5a827999]*20 +\
[0x6ed9eba1]*20 +\
[0x8f1bbcdc]*20 +\
[0xca62c1d6]*20
self.initstate()
def initstate(self):
H = [0x67452301,0xefcdab89,0x98badcfe,0x10325476,0xc3d2e1f0]
self.H = [Bits(v,self.wsize) for v in H]
self.padmethod = SHApadding(self.blocksize,self.wsize)
def iterblocks(self,M,bitlen=None,padding=False):
osize = self.blocksize/8
fmt = '>16L' if self.wsize==32 else '>16Q'
for B in self.padmethod.iterblocks(M,bitlen=bitlen,padding=padding):
W = struct.unpack(fmt,B)
yield [Bits(w,self.wsize) for w in W]
def __call__(self,M,bitlen=None):
self.initstate()
return self.update(M,bitlen=bitlen,padding=True)
def update(self,M,bitlen=None,padding=False):
for W in self.iterblocks(M,bitlen=bitlen,padding=padding):
a,b,c,d,e = self.H
assert len(W)==16
for t in range(16,80):
w = rol(W[t-3]^W[t-8]^W[t-14]^W[t-16],self.version)
W.append(w)
for r in range(80):
T = rol(a,5)+self.ft[r](b,c,d)+e+self.K[r]+W[r]
e = d
d = c
c = rol(b,30)
b = a
a = T
self.H[0] += a
self.H[1] += b
self.H[2] += c
self.H[3] += d
self.H[4] += e
return ''.join([pack(h,'>L') for h in self.H])
def initstate(self):
t = self.outlen * 8
if t == 224:
H = [
0xc1059ed8 if self.size == t else 0x8C3D37C819544DA2,
0x367cd507 if self.size == t else 0x73E1996689DCD4D6,
0x3070dd17 if self.size == t else 0x1DFAB7AE32FF9C82,
0xf70e5939 if self.size == t else 0x679DD514582F9FCF,
0xffc00b31 if self.size == t else 0x0F6D2B697BD44DA8,
0x68581511 if self.size == t else 0x77E36F7304C48942,
0x64f98fa7 if self.size == t else 0x3F9D85A86A1D36C8,
0xbefa4fa4 if self.size == t else 0x1112E6AD91D692A1,
]
elif t == 256:
H = [
0x6a09e667 if self.size == t else 0x22312194FC2BF72C,
0xbb67ae85 if self.size == t else 0x9F555FA3C84C64C2,
0x3c6ef372 if self.size == t else 0x2393B86B6F53B151,
0xa54ff53a if self.size == t else 0x963877195940EABD,
0x510e527f if self.size == t else 0x96283EE2A88EFFE3,
0x9b05688c if self.size == t else 0xBE5E1E2553863992,
0x1f83d9ab if self.size == t else 0x2B0199FC2C85B8AA,
0x5be0cd19 if self.size == t else 0x0EB72DDC81C52CA2,
]
elif t == 384:
H = [
0xcbbb9d5dc1059ed8,
0x629a292a367cd507,
0x9159015a3070dd17,
0x152fecd8f70e5939,
0x67332667ffc00b31,
0x8eb44a8768581511,
0xdb0c2e0d64f98fa7,
0x47b5481dbefa4fa4,
]
elif t == 512:
H = [
0x6a09e667f3bcc908,
0xbb67ae8584caa73b,
0x3c6ef372fe94f82b,
0xa54ff53a5f1d36f1,
0x510e527fade682d1,
0x9b05688c2b3e6c1f,
0x1f83d9abfb41bd6b,
0x5be0cd19137e2179,
]
self.H = [Bits(v, self.wsize) for v in H]
self.padmethod = SHApadding(self.blocksize, self.wsize)
def initstate(self):
H = [0x67452301,0xefcdab89,0x98badcfe,0x10325476,0xc3d2e1f0]
self.H = [Bits(v,self.wsize) for v in H]
self.padmethod = SHApadding(self.blocksize,self.wsize)
def initstate(self):
H = [0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476, 0xc3d2e1f0]
self.H = [Bits(v, self.wsize) for v in H]
self.padmethod = SHApadding(self.blocksize, self.wsize)
