def decrypt():
print("请输入从平台复制得到的字符串: ")
str = input()
bhindex = str.find("密图哈希:")
ehindex = str.find(',', bhindex)
bkeyindex = str.find("密钥:")
ekeyindex = str.find(",", bkeyindex)
ehash = str[bhindex + 5:ehindex]
rawkey = str[bkeyindex + 3:ekeyindex]
url = "https://ipfs.io/ipfs/" + ehash
imgpath = "enc.png"
deimgpath = "output.png"
# with request.urlopen(url) as web:
# # 为保险起见使用二进制写文件模式，防止编码错误
# with open(imgpath, 'wb') as outfile:
# outfile.write(web.read())
print("请输入您的私钥文件路径:")
keypath = input()
if os.path.isfile(keypath):
with open(keypath, 'r') as f:
prikey = f.read()
imgkey = SM2Python.SM2Decrypt(rawkey, prikey)
rc = rc4.RC4(imgkey, imgpath, deimgpath)
rc.encrypted()
# sm4_d = sm4.Sm4()
# sm4_d.sm4_set_key(imgkey, 1) # 解密
# sm4_d.sm4_crypt_ecb(imgpath, deimgpath)
os.remove(imgpath)
print("图片解密完成，您的原图为output.png")
else:
print("您输入的文件不存在")
def strdecrypt():
print("请输入等待解密的字符")
encstr = input()
# bhindex = encstr.find("对方公钥:")
# ehindex = len(encstr)-1
# enckey = encstr[bhindex+5: ehindex]
print("请输入您的私钥文件路径:")
keypath = input()
if os.path.isfile(keypath):
with open(keypath, 'r') as f:
prikey = f.read()
strdec = SM2Python.SM2Decrypt(encstr, prikey)
dec_m = binascii.a2b_hex(strdec)
print("解密出来的字符串：", dec_m.decode())
else:
print("您输入的文件不存在")
def sm2_decrypt(cipher: str, prikey: str, length=None):
'''
返回十六进制明文字符串,length指明文是否有固定的长度
'''
incre = 254
# 密文快为254*4bit
block = [cipher[i:i + incre] for i in range(0, len(cipher), incre)]
plain = []
for each in block:
plain.append(sm2.SM2Decrypt(each, prikey))
plain = ''.join(plain)
plain = list(plain)
#print(plain)
while plain[-1] == '0':
if length != None and len(plain) > length:
plain.pop()
elif length != None and len(plain) <= length:
break
else:
plain.pop()
plain = ''.join(plain)
return plain
import SM2Python
str_k = "F6000277CA814FFF1D7BA2E499297B0E00F8575DCF5F3480C00FCB7DFFBA743E"
str_pubkey = "6456CC2649C6216281EE91DCDC5A75C8E92706C3C9B85362796E8E8277BB34A663C11AF6619F6C5A452626EF2703BE187681A816D988467DED48D17E5E54F613"
str_prikey = "50E7324D208DC091C089FB98FAEC64468EAE6789B0F707EDFE86EF7CB754DAEA"
str_plain = "B0448E89946BB21EC649FDF3BA46296602182849FBE2D329AAF843DE0D7CA7"
print("plain :\n" + str_plain)
str_cipher = SM2Python.SM2Encrypt(str_k, str_pubkey, str_plain)
print("cipher :\n" + str_cipher)
plain = SM2Python.SM2Decrypt(str_cipher, str_prikey)
print("decrypt cipher and get plain :\n" + plain)
input()