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

網上搜一堆不靠譜的，沒辦法只能自己動手寫一份了

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！

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