my sha256:
# -*- coding:utf-8 -*-
'''
Created on 2018年12月14日
gen wallet
@author: user
'''
class SHA256:
def __init__(self):
#64个常量
#图中Kt
self.constants = (
0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,
0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,
0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,
0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7,
0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3,
0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5,
0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2)
#迭代初始值，h0,h1,...,h7
self.h = (
0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a,
0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19)
#x循环右移b个bit
#rightrotate b bit
def rightrotate(self, x, b):
return ((x >> b) | (x << (32 - b))) & ((2**32)-1)
#信息预处理。附加填充和附加长度值
def Pad(self, W):
return bytes(W, "ascii") + b"\x80" + (b"\x00" * ((55 if (len(W) % 64) < 56 else 119) - (len(W) % 64))) + (
(len(W) << 3).to_bytes(8, "big"))
def Compress(self, Wt, Kt, A, B, C, D, E, F, G, H):
return ((H + (self.rightrotate(E, 6) ^ self.rightrotate(E, 11) ^ self.rightrotate(E, 25)) + (
(E & F) ^ (~E & G)) + Wt + Kt) + (
self.rightrotate(A, 2) ^ self.rightrotate(A, 13) ^ self.rightrotate(A, 22)) + (
(A & B) ^ (A & C) ^ (B & C))) & ((2**32)-1), A, B, C, (D + (
H + (self.rightrotate(E, 6) ^ self.rightrotate(E, 11) ^ self.rightrotate(E, 25)) + (
(E & F) ^ (~E & G)) + Wt + Kt)) & ((2**32)-1), E, F, G
def hash(self, message):
message = self.Pad(message)
digest = list(self.h)
for i in range(0, len(message), 64):
S = message[i: i + 64]
W = [int.from_bytes(S[e: e + 4], "big") for e in range(0, 64, 4)] + ([0] * 48)
#构造64个word
for j in range(16, 64):
W[j] = (W[j - 16] + (
self.rightrotate(W[j - 15], 7) ^ self.rightrotate(W[j - 15], 18) ^ (W[j - 15] >> 3)) + W[
j - 7] + (self.rightrotate(W[j - 2], 17) ^ self.rightrotate(W[j - 2], 19) ^ (
W[j - 2] >> 10))) & ((2**32)-1)
A, B, C, D, E, F, G, H = digest
for j in range(64):
A, B, C, D, E, F, G, H = self.Compress(W[j], self.constants[j], A, B, C, D, E, F, G, H)
return "".join(format(h, "02x") for h in b"".join(
d.to_bytes(4, "big") for d in [(x + y) & ((2**32)-1) for x, y in zip(digest, (A, B, C, D, E, F, G, H))]))
def main():
encoder = SHA256()
while True:
message = input("Enter string: ")
print(f"Output: {encoder.hash(message)}\n")
if __name__ == "__main__":
main()
Enter string: test
Output: 9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08
输入测试值test
结果为： 9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08
与sha256sum的值一致:
[ubu@dev1:~]$ echo -n test | sha256sum
9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08 -
