python RSA加密

遇到一個 java 的RSA/ECB/PKCS1Padding 加密 要改成python的

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網上搜一堆不靠譜的，沒辦法只能自己動手寫一份了

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中間遇到一個ERROR：

 OverflowError: 458 bytes needed for message, but there is only space for 117

遇到問題解決它

上代碼：

import rsa
import base64
from Crypto.PublicKey import RSA
from Crypto.Cipher import PKCS1_v1_5 as Cipher_pkcs1_v1_5
#rsa加密，通常對加密結果進行base64編碼

def handle_pub_key(key):
    """
    處理公鑰
    公鑰格式pem，處理成以-----BEGIN PUBLIC KEY-----開頭，-----END PUBLIC KEY-----結尾的格式
    :param key:pem格式的公鑰，無-----BEGIN PUBLIC KEY-----開頭，-----END PUBLIC KEY-----結尾
    :return:
    """
    start = '-----BEGIN PUBLIC KEY-----\n'
    end = '-----END PUBLIC KEY-----'
    result = ''
    # 分割key，每64位長度換一行
    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):
    """
    處理長消息 不經過 這個處理回報下面error
    OverflowError: 458 bytes needed for message, but there is only space for 117
    :param message 消息
    :param public_key 公鑰
    :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！

用了記得點贊！留個言更好！