python3 RSA 长字符串分段加密解密

1.RSA长字符串分段加密解密

2.RSA加密最新(RSA/ECB/PKCS1Padding)

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

解决方式如下：

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-----

    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] + 

    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)

1.RSA长字符串分段加密解密 2.RSA加密最新(RSA/ECB/PKCS1Padding) 报错： OverflowError: 458 bytes needed for message, but there is only space for 117 解决方式如下： 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----- 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] + 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)