资源简介
Hash函数
代码片段和文件信息
from math import ceil
IV=“7380166f 4914b2b9 172442d7 da8a0600 a96f30bc 163138aa e38dee4d b0fb0e4e“
IV = int(IV.replace(“ “ ““) 16)
a = []
for i in range(0 8):
a.append(0)
a[i] = (IV >> ((7 - i) * 32)) & 0xFFFFFFFF
IV = a
def out_hex(list1):
for i in list1:
print(“%08x“ % i)
print(“\n“)
def rotate_left(a k):
k = k % 32
return ((a << k) & 0xFFFFFFFF) | ((a & 0xFFFFFFFF) >> (32 - k))
T_j = []
for i in range(0 16):
T_j.append(0)
T_j[i] = 0x79cc4519
for i in range(16 64):
T_j.append(0)
T_j[i] = 0x7a879d8a
def FF_j(X Y Z j):
if 0 <= j and j < 16:
ret = X ^ Y ^ Z
elif 16 <= j and j < 64:
ret = (X & Y) | (X & Z) | (Y & Z)
return ret
def GG_j(X Y Z j):
if 0 <= j and j < 16:
ret = X ^ Y ^ Z
elif 16 <= j and j < 64:
#ret = (X | Y) & ((2 ** 32 - 1 - X) | Z)
ret = (X & Y) | ((~ X) & Z)
return ret
def P_0(X):
return X ^ (rotate_left(X 9)) ^ (rotate_left(X 17))
def P_1(X):
return X ^ (rotate_left(X 15)) ^ (rotate_left(X 23))
def CF(V_i B_i):
W = []
for i in range(16):
weight = 0x1000000
data = 0
for k in range(i*4(i+1)*4):
data = data + B_i[k]*weight
weight = int(weight/0x100)
W.append(data)
for j in range(16 68):
W.append(0)
W[j] = P_1(W[j-16] ^ W[j-9] ^ (rotate_left(W[j-3] 15))) ^ (rotate_left(W[j-13] 7)) ^ W[j-6]
str1 = “%08x“ % W[j]
W_1 = []
for j in range(0 64):
W_1.append(0)
W_1[j] = W[j] ^ W[j+4]
str1 = “%08x“ % W_1[j]
A B C D E F G H = V_i
“““
print “00“
out_hex([A B C D E F G H])
“““
for j in range(0 64):
SS1 = rotate_left(((rotate_left(A 12)) + E + (rotate_left(T_j[j] j))) & 0xFFFFFFFF 7)
SS2 = SS1 ^ (rotate_left(A 12))
TT1 = (FF_j(A B C j) + D + SS2 + W_1[j]) & 0xFFFFFFFF
TT2 = (GG_j(E F G j) + H + SS1 + W[j]) & 0xFFFFFFFF
D = C
C = rotate_left(B 9)
B = A
A = TT1
H = G
G = rotate_left(F 19)
F = E
E = P_0(TT2)
A = A & 0xFFFFFFFF
B = B & 0xFFFFFFFF
C = C & 0xFFFFFFFF
D = D & 0xFFFFFFFF
E = E & 0xFFFFFFFF
F = F & 0xFFFFFFFF
G = G & 0xFFFFFFFF
H = H & 0xFFFFFFFF
“““
str1 = “%02d“ % j
if str1[0] == “0“:
str1 = ‘ ‘ + str1[1:]
print str1
out_hex([A B C D E F G H])
“““
V_i_1 = []
V_i_1.append(A ^
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