python 實現rsa對稱加解密目前有三個庫：rsa、pycryptodome、M2Crypto
前兩個庫只能實現公鑰加密私鑰解密，M2Crypto可以實現公私鑰互相加解密
M2Crypto的安裝：
一、環境
1.操作系統：CentOS7.3
2.python： python3.6
3.M2Crypto安裝：
(1)yum -y install python-devel
(2)pip install M2Crypto
二、代碼
1.生成公私鑰對
from M2Crypto import RSA
# 2048代表生成密鑰的位數，65537代表公鑰的指數
key = RSA.gen_key(2048, 65537)
key.save_key("private_key", None)
key.save_pub_key("public_key")
2.導入公私鑰證書字符串加密
from M2Crypto import RSA
from M2Crypto import BIO
from binascii import a2b_hex, b2a_hex
PUBLIC_KEY = '''
-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA5VavyEaIAZEQzx9S5zdp
hrkluga2IDuxodXTUkVqTeMBx3j4iHv9P/Ci7+WZowXyCA9v3cuPaYjAFIbCOErW
QKP9w6xWEtlvFuFs0AJ4QIXlFM2UDYuTGzsrAH7wI7tJl5Bd2ugCl+YFz85J1XE1
3A1knlk4eoQ0UCaFCoHjqgI0U6+Immvv51kQ0R00UHjOkPI3WIoulFxXULw/Svpk
YHeWh3CgwFJridqf3w2wyXJOhKZWUt+ZadTy+2OHJ++vmpYaFFolN2fWSMCI682j
o47ZP2KTH/LTEYfhByAgkF3+09JZB6idgz3hgyqcRTdCQb/ziJD2D/z3WIAf0ts2
vQIDAQAB
-----END PUBLIC KEY-----
'''
PRIVATE_KEY = '''
-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----
'''
def load_pub_key_string(string):
bio = BIO.MemoryBuffer(string)
return RSA.load_pub_key_bio(bio)
def block_data(texts, block_size):
for i in range(0, len(texts), block_size):
yield texts[i:i + block_size]
def encrypt(texts):
ciphertext = b""
block_size = 256 - 11
for text in block_data(texts.encode('utf-8'), block_size):
current_text = pri_key.private_encrypt(text, RSA.pkcs1_padding)
ciphertext += current_text
return b2a_hex(ciphertext)
def decrypt(texts):
plaintext = b""
block_size = 256
for text in block_data(a2b_hex(texts), block_size):
current_text = pub_key.public_decrypt(text, RSA.pkcs1_padding)
plaintext += current_text
return plaintext
pri_key = RSA.load_key_string(PRIVATE_KEY.strip('\n').encode('utf-8'))
pub_key = load_pub_key_string(PUBLIC_KEY.strip('\n').encode('utf-8'))
texts ="hellohellohellohellohellohellohellohellohellohellohellohellohello" \
"hellohellohellohellohellohellohellohellohellohellohellohellohello" \
"hellohellohellohellohellohellohellohellohellohellohellohellohello" \
"hellohellohellohellohellohellohellohellohellohellohello"
ciphertext = encrypt(texts)
print(ciphertext)
plaintext = decrypt(ciphertext)
print(plaintext)
類：
from M2Crypto import RSA
from M2Crypto import BIO
from M2Crypto import m2
from binascii import a2b_hex, b2a_hex
class RsaCipherer(object):
PUBLIC_KEY = '''
-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA320PEM1KarSKHoXa/K9V
ki0vBCLYkyX22yXbEabiGVFdY+H3nZsDAtmm8ydgKUM+4f9HOM6Vv060cloQDPa0
XjI02ihbfHZ7fz5ve6BZbTZOTs5qit8UJR/pqwn1O2U0EAANYswIhb81xbBXA2bA
IjIGQ2kD+4AjkrYtGCHtosgNrCa06wX/FDaIlcT4i347fjlgzZeoQQo1WIt9py0F
wz8iMN5KyOxtd7pH7BmRnyC4UI85wmBe0f2k+JsN0yczuOxSV4F4Ros+n8Xld6xY
KVXGndvQNpYzaGjQ9iMndFq4xDOozEGirJlpggJEtsCYmM94DGuX4QIpYnNTRteX
rQIDAQAB
-----END PUBLIC KEY-----
'''
PRIVATE_KEY = '''
-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----
'''
def __init__(self):
self.public_key = \
RsaCipherer.PUBLIC_KEY.strip('\n').replace(' ', '')
self.private_key = \
RsaCipherer.PRIVATE_KEY.strip('\n').replace(' ', '')
self.public_key_cipher = \
self.load_pub_key_string(self.public_key.encode('utf-8'))
self.private_key_cipher = \
RSA.load_key_string(self.private_key.encode('utf-8'))
self.secret_key_length = self.size_in_bytes(self.public_key_cipher)
def encrypt(self, texts):
ciphertext = b""
block_size = self.secret_key_length - 11
for text in self.block_data(texts.encode('utf-8'), block_size):
current_text = self.private_key_cipher.private_encrypt(text, RSA.pkcs1_padding)
ciphertext += current_text
return b2a_hex(ciphertext)
def decrypt(self, texts):
plaintext = b""
block_size = self.secret_key_length
for text in self.block_data(a2b_hex(texts), block_size):
current_text = \
self.public_key_cipher.public_decrypt(text, RSA.pkcs1_padding)
plaintext += current_text
return plaintext
@staticmethod
def block_data(texts, block_size):
for i in range(0, len(texts), block_size):
yield texts[i:i + block_size]
@staticmethod
def load_pub_key_string(string):
bio = BIO.MemoryBuffer(string)
return RSA.load_pub_key_bio(bio)
@staticmethod
def size_in_bytes(cipher_obj):
return m2.rsa_size(cipher_obj.rsa)
if __name__ == "__main__":
texts ="hellohellohellohellohellohellohellohellohellohellohellohellohello" \
"hellohellohellohellohellohellohellohellohellohellohellohellohello" \
"hellohellohellohellohellohellohellohellohellohellohellohellohello" \
"hellohellohellohellohellohellohellohellohellohellohello"
tests1 = "hello"
RsaCipher = RsaCipherer()
# Encrypted data
cipher = RsaCipherer()
cipher_text = cipher.encrypt(texts)
plain_text = cipher.decrypt(cipher_text)
print("密文:\n", cipher_text)
print("明文:\n", plain_text)