Python解码Fernet密钥
it1352
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问题说明
我生成了几个Fernet密钥，并以str格式存储以供参考.现在，我需要将这些Fernet密钥以str格式编码为32个url安全的base64编码字节，以解密我的数据.
I have generated few fernet keys and stored in str format for reference. Now, I need to encode these fernet keys in str format to 32 url-safe base64-encoded bytes to decrypt my data.
from cryptography.fernet import Fernet as frt
keys=set()
keybin='keys'
keybin=open(keybin,'w')
for i in range(r.randint(5,14)):
key=frt.generate_key()
keys.add(key.decode())
for k in keys:
keybin.write(str(k))
keybin.write('\n')
我正在使用以下代码访问文件并解密 s
I'm using below code to access the file and decrypt s
key=linecache.getline(cfile,x).encode()
key=base64.b64encode(key)
print(key)
f=frt(key)
token =f.decrypt(s.encode())
但是给我以下错误:
"Fernet key must be 32 url-safe base64-encoded bytes."
ValueError: Fernet key must be 32 url-safe base64-encoded bytes.
正确答案
#1
在不使用base64编码密钥的情况下尝试您的代码，即:
Try your code without base64 encoding your key ie:
from cryptography.fernet import Fernet as frt
key=frt.generate_key()
s = "message"
print('input string: {0}'.format(s))
#key=base64.b64encode(key) #no need to do this
print('key: {0}, type: {1}'.format(key, type(key)))
f=frt(key)
token = f.encrypt(s.encode('utf-8')) #need to convert the string to bytes
print ('encrypted: {0}'.format(token))
output = f.decrypt(token)
output_decoded = output.decode('utf-8')
print ('decrypted: {0}'.format(output_decoded))
这篇好文章是转载于：学新通技术网
