遇到一个 java 的RSA/ECB/PKCS1Padding 加密 要改成python的
网上搜一堆不靠谱的，没办法只能自己动手写一份了
中间遇到一个ERROR：
OverflowError: 458 bytes needed for message, but there is only space for 117
遇到问题解决它
上代码：
import rsa
import base64
from Crypto.PublicKey import RSA
from Crypto.Cipher import PKCS1_v1_5 as Cipher_pkcs1_v1_5
#rsa加密，通常对加密结果进行base64编码
def handle_pub_key(key):
"""
处理公钥
公钥格式pem，处理成以-----BEGIN PUBLIC KEY-----开头，-----END PUBLIC KEY-----结尾的格式
:param key:pem格式的公钥，无-----BEGIN PUBLIC KEY-----开头，-----END PUBLIC KEY-----结尾
:return:
"""
start = '-----BEGIN PUBLIC KEY-----\n'
end = '-----END PUBLIC KEY-----'
result = ''
# 分割key，每64位长度换一行
divide = int(len(key) / 64)
divide = divide if (divide > 0) else divide + 1
line = divide if (len(key) % 64 == 0) else divide + 1
for i in range(line):
result += key[i * 64:(i + 1) * 64] + '\n'
result = start + result + end
return result
def get_param(message, public_key):
"""
处理长消息 不经过 这个处理回报下面error
OverflowError: 458 bytes needed for message, but there is only space for 117
:param message 消息
:param public_key 公钥
:return:
"""
pubkey = rsa.PublicKey.load_pkcs1_openssl_pem(public_key)
crypto = b''
divide = int(len(message) / 117)
divide = divide if (divide > 0) else divide + 1
line = divide if (len(message) % 117 == 0) else divide + 1
for i in range(line):
crypto += rsa.encrypt(message[i * 117:(i + 1) * 117].encode(), pubkey)
crypto1 = base64.b64encode(crypto)
return crypto1.decode()
if __name__ == '__main__':
message = "infodownloadermiddlewareshttpcompressionHttpCompressionMiddleware"*10
public_key = "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQClsqQiK5KMBO88nf2CE6I5aGJQX9jTXorDveudfSKts2/5i/ipCLo68rl4gsPYwzjP5ef5IJTK0Xdzrrfkn5d2GCVA7n/jN3rlqjfSy1w2D4JqMUtqEhRQr7KfofZbZBnPOooiepRht+W0D9rIAceLLD5UPpstZ4lPCW2t/PG0hQIDAQAB"
public_key = handle_pub_key(public_key)
param = get_param(message, public_key)
print(param)
success！
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