Python 實現國產SM3加密演算法的示例程式碼
阿新 • • 發佈:2020-09-22
SM3是中華人民共和國政府採用的一種密碼雜湊函式標準,由國家密碼管理局於2010年12月17日釋出。主要用於報告檔案數字簽名及驗證。
Python3程式碼如下:
from math import ceil ############################################################################## # # 國產SM3加密演算法 # ############################################################################## 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,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,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,j) + D + SS2 + W_1[j]) & 0xFFFFFFFF TT2 = (GG_j(E,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 V_i_1 = [] V_i_1.append(A ^ V_i[0]) V_i_1.append(B ^ V_i[1]) V_i_1.append(C ^ V_i[2]) V_i_1.append(D ^ V_i[3]) V_i_1.append(E ^ V_i[4]) V_i_1.append(F ^ V_i[5]) V_i_1.append(G ^ V_i[6]) V_i_1.append(H ^ V_i[7]) return V_i_1 def hash_msg(msg): # print(msg) len1 = len(msg) reserve1 = len1 % 64 msg.append(0x80) reserve1 = reserve1 + 1 # 56-64,add 64 byte range_end = 56 if reserve1 > range_end: range_end = range_end + 64 for i in range(reserve1,range_end): msg.append(0x00) bit_length = (len1) * 8 bit_length_str = [bit_length % 0x100] for i in range(7): bit_length = int(bit_length / 0x100) bit_length_str.append(bit_length % 0x100) for i in range(8): msg.append(bit_length_str[7 - i]) # print(msg) group_count = round(len(msg) / 64) B = [] for i in range(0,group_count): B.append(msg[i * 64:(i + 1) * 64]) V = [] V.append(IV) for i in range(0,group_count): V.append(CF(V[i],B[i])) y = V[i + 1] result = "" for i in y: result = '%s%08x' % (result,i) return result def str2byte(msg): # 字串轉換成byte陣列 ml = len(msg) msg_byte = [] msg_bytearray = msg # 如果加密物件是字串,則在此對msg做encode()編碼即可,否則不編碼 for i in range(ml): msg_byte.append(msg_bytearray[i]) return msg_byte def byte2str(msg): # byte陣列轉字串 ml = len(msg) str1 = b"" for i in range(ml): str1 += b'%c' % msg[i] return str1.decode('utf-8') def hex2byte(msg): # 16進位制字串轉換成byte陣列 ml = len(msg) if ml % 2 != 0: msg = '0' + msg ml = int(len(msg) / 2) msg_byte = [] for i in range(ml): msg_byte.append(int(msg[i * 2:i * 2 + 2],16)) return msg_byte def byte2hex(msg): # byte陣列轉換成16進位制字串 ml = len(msg) hexstr = "" for i in range(ml): hexstr = hexstr + ('%02x' % msg[i]) return hexstr def KDF(Z,klen): # Z為16進製表示的位元串(str),klen為金鑰長度(單位byte) klen = int(klen) ct = 0x00000001 rcnt = ceil(klen / 32) Zin = hex2byte(Z) Ha = "" for i in range(int(rcnt)): msg = Zin + hex2byte('%08x' % ct) # print(msg) Ha = Ha + hash_msg(msg) # print(Ha) ct += 1 return Ha[0: klen * 2] def sm3_hash(msg,Hexstr=0): """ 封裝方法,外部呼叫 :param msg: 二進位制流(如若需要傳入字串,則把str2byte方法裡msg做encode()編碼一下,否則不編碼) :param Hexstr: 0 :return: 64位SM3加密結果 """ if (Hexstr): msg_byte = hex2byte(msg) else: msg_byte = str2byte(msg) return hash_msg(msg_byte) if __name__ == '__main__': print(sm3_hash(b'SM3Test'))# 列印結果:901053b4681483b737dd2dd9f9a7f56805aa1b03337f8c1abb763a96776b8905
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