Python Rsa密码错误
我用Python3.4编写了以下代码Python Rsa密码错误,python,Python,我用Python3.4编写了以下代码 import sys DEFAULT_BLOCK_SIZE = 128 BYTE_SIZE = 256 def main(): filename = 'encrypted_file.txt' mode = 'encrypt' if mode == 'encrypt': message = '''"Journalists belong in the gutter because that is where
import sys
DEFAULT_BLOCK_SIZE = 128
BYTE_SIZE = 256
def main():
filename = 'encrypted_file.txt'
mode = 'encrypt'
if mode == 'encrypt':
message = '''"Journalists belong in the gutter because that is where the ruling classes throw their guilty secrets." -Gerald Priestland "TheFounding Fathers gave the free press the protection it must have to bare the secrets of government and inform the people." -Hugo Black'''
pubKeyFilename = 'vineeth_pubkey.txt'
print('Encrypting and writing to %s...' % (filename))
encryptedText = encryptAndWriteToFile(filename, pubKeyFilename, message)
print('Encrypted text:')
print(encryptedText)
elif mode == 'decrypt':
privKeyFilename = 'vineeth_privkey.txt'
print('Reading from %s and decrypting...' % (filename))
decryptedText = readFromFileAndDecrypt(filename, privKeyFilename)
print('Decrypted text:')
print(decryptedText)
def getBlocksFromText(message, blockSize=DEFAULT_BLOCK_SIZE):
messageBytes = message.encode('ascii')
blockInts = []
for blockStart in range(0, len(messageBytes), blockSize):
blockInt = 0
for i in range(blockStart, min(blockStart + blockSize, len(messageBytes))):
blockInt += messageBytes[i] * (BYTE_SIZE ** (i % blockSize))
blockInts.append(blockInt)
return blockInts
def getTextFromBlocks(blockInts, messageLength,blockSize=DEFAULT_BLOCK_SIZE):
message = []
for blockInt in blockInts:
blockMessage = []
for i in range(blockSize- 1, -1, -1):
if len(message) + i < messageLength:
asciiNumber = blockInt // (BYTE_SIZE ** i)
blockInt = blockInt % (BYTE_SIZE ** i)
blockMessage.insert(0, chr(asciiNumber))
message.extend(blockMessage)
return ''.join(message)
def encryptMessage(message, key, blockSize=DEFAULT_BLOCK_SIZE):
encryptedBlocks = []
n, e = key
for block in getBlocksFromText(message, blockSize):
encryptedBlocks.append(pow(block, e, n))
return encryptedBlocks
def decryptMessage(encryptedBlocks, messageLength, key, blockSize=DEFAULT_BLOCK_SIZE):
decryptedBlocks = []
n, d = key
for block in encryptedBlocks:
decryptedBlocks.append(pow(block, d, n))
return getTextFromBlocks(decryptedBlocks, messageLength, blockSize)
def readKeyFile(keyFilename):
fo = open(keyFilename)
content = fo.read()
fo.close()
keySize, n, EorD = content.split(',')
return (int(keySize), int(n), int(EorD))
def encryptAndWriteToFile(messageFilename, keyFilename, message, blockSize=DEFAULT_BLOCK_SIZE):
keySize, n, e = readKeyFile(keyFilename)
if keySize < blockSize * 8:
print'ERROR: Block size is %s bits and key size is %s bits. The RSA cipher requires the block size to be equal to or less than the key size. Either increase the block size or use different keys.' % (blockSize * 8, keySize)
sys.exit()
encryptedBlocks = encryptMessage(message, (n, e), blockSize)
for i in range(len(encryptedBlocks)):
encryptedBlocks[i] = str(encryptedBlocks[i])
encryptedContent = ','.join(encryptedBlocks)
encryptedContent = '%s_%s_%s' % (len(message), blockSize, encryptedContent)
fo = open(messageFilename, 'w')
fo.write(encryptedContent)
fo.close()
return encryptedContent
def readFromFileAndDecrypt(messageFilename, keyFilename):
keySize, n, d = readKeyFile(keyFilename)
fo = open(messageFilename)
content = fo.read()
messageLength, blockSize, encryptedMessage = content.split('_')
messageLength = int(messageLength)
blockSize = int(blockSize)
if keySize < blockSize * 8:
print 'ERROR: Block size is %s bits and key size is %s bits. The RSA cipher requires the block size to be equal to or less than the keysize. Did you specify the correct key file and encrypted file?' % (blockSize * 8, keySize)
encryptedBlocks = []
for block in encryptedMessage.split(','):
encryptedBlocks.append(int(block))
return decryptMessage(encryptedBlocks, messageLength, (n, d), blockSize)
if __name__ == '__main__':
main()
Traceback (most recent call last):
File "E:\Python27\My programs\rsa.py", line 94, in <module>
main()
File "E:\Python27\My programs\rsa.py", line 11, in main
encryptedText = encryptAndWriteToFile(filename, pubKeyFilename, message)
File "E:\Python27\My programs\rsa.py", line 69, in encryptAndWriteToFile
encryptedBlocks = encryptMessage(message, (n, e), blockSize)
File "E:\Python27\My programs\rsa.py", line 46, in encryptMessage
for block in getBlocksFromText(message, blockSize):
File "E:\Python27\My programs\rsa.py", line 27, in getBlocksFromText
blockInt += messageBytes[i] * (BYTE_SIZE ** (i % blockSize))
TypeError: unsupported operand type(s) for +=: 'int' and 'str'
回溯（最近一次呼叫最后一次）：
文件“E:\Python27\My programs\rsa.py”，第94行，在
main（）
文件“E:\Python27\My programs\rsa.py”，第11行，在main中
encryptedText=EncryptedWriteFile（文件名、pubKeyFilename、消息）
EncryptAndWriteFile中第69行的文件“E:\Python27\My programs\rsa.py”
encryptedBlocks=encryptMessage（消息，（n，e），块大小）
encryptMessage中第46行的文件“E:\Python27\My programs\rsa.py”
对于getBlocksFromText中的块（消息，块大小）：
getBlocksFromText中第27行的文件“E:\Python27\My programs\rsa.py”
blockInt+=messageBytes[i]*（字节大小**（i%blockSize））
TypeError:不支持+=：'int'和'str'的操作数类型
numbers = 12345
letters = 'abcde'
num_letters = '12345'
# this works:
str(numbers)
int(num_letters)
# this doesn't work:
int(letters)
我知道这个错误，但我不知道如何将int和string转换成相同的类型。如果您发布代码的编辑版本，这将非常有用。谢谢这可能不是原因。在Python3中，仍然不能在
intstr+=