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bugfix

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yumoqing 2022-06-28 17:02:00 +08:00
parent 57e5ea7b1b
commit 350bc61733
2 changed files with 105 additions and 176 deletions
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176
appPublic/rsa.py
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@ -1,176 +0,0 @@
from cryptography.hazmat.backends import default_backend
from cryptography.hazmat.primitives.asymmetric import rsa
from cryptography.hazmat.primitives import hashes
from cryptography.hazmat.primitives.asymmetric import padding
from cryptography.hazmat.primitives import serialization
from cryptography.exceptions import InvalidSignature
import base64
class RSA:
def __init__(self):
pass
def write_privatekey(self,private_key,fname,password=None):
pwd = password
pem = ''
if pwd is not None:
pwd = bytes(pwd,encoding='utf8') if not isinstance(pwd, bytes) else pwd
pem = private_key.private_bytes(
encoding=serialization.Encoding.PEM,
format=serialization.PrivateFormat.PKCS8,
encryption_algorithm=serialization.BestAvailableEncryption(pwd)
)
else:
pem = private_key.private_bytes(
encoding=serialization.Encoding.PEM,
format=serialization.PrivateFormat.TraditionalOpenSSL,
encryption_algorithm=serialization.NoEncryption()
)
with open(fname,'w') as f:
text = pem.decode('utf8')
f.write(text)
def publickeyText(self,public_key):
pem = public_key.public_bytes(
encoding=serialization.Encoding.PEM,
format=serialization.PublicFormat.SubjectPublicKeyInfo
)
text = pem.decode('utf8')
return text
def write_publickey(self,public_key,fname):
text = self.publickeyText(public_key)
with open(fname,'w') as f:
f.write(text)
def read_privatekey(self,fname,password=None):
pwd = password
if password is not None:
pwd = bytes(password,encoding='utf8') if not isinstance(password, bytes) else password
with open(fname, "rb") as key_file:
key = serialization.load_pem_private_key(
key_file.read(),
password=pwd,
backend=default_backend()
)
return key
def publickeyFromText(self,text):
public_key_bytes = bytes(text,encoding='utf8')
return serialization.load_pem_public_key(data=public_key_bytes,backend=default_backend())
def read_publickey(self,fname):
with open(fname,'r') as f:
text = f.read()
return self.publickeyFromText(text)
def create_privatekey(self, keylength=2048):
return rsa.generate_private_key(
public_exponent=65537,
key_size=keylength,
backend=default_backend()
)
def create_publickey(self,private_key):
return private_key.public_key()
def encode_bytes(self, public_key, bdata):
return public_key.encrypt(bdata,
padding.OAEP(
mgf=padding.MGF1(algorithm=hashes.SHA256()),
algorithm=hashes.SHA256(),
label=None
))
def encode(self,public_key,text):
message_bytes = bytes(text, encoding='utf8') if not isinstance(text, bytes) else text
cdata = self.encode_bytes(public_key, message_bytes)
return str(base64.b64encode(cdata), encoding='utf-8')
def decode_bytes(self, private_key, bdata):
return private_key.decrypt(
bdata,padding.OAEP(
mgf=padding.MGF1(algorithm=hashes.SHA256()),
algorithm=hashes.SHA256(),
label=None
)
)
def decode(self,private_key,cipher):
cipher = cipher.encode('utf8') if not isinstance(cipher, bytes) else cipher
ciphertext_decoded = base64.b64decode(cipher)
plain_text = self.decode_bytes(private_key, ciphertext_decoded)
return str(plain_text, encoding='utf8')
def sign_bdata(self, private_key, data_to_sign):
s = private_key.sign(data_to_sign,
padding.PSS(
mgf=padding.MGF1(hashes.SHA256()),
salt_length=padding.PSS.MAX_LENGTH
),
hashes.SHA256()
)
return s
def sign(self,private_key,message):
data_to_sign = bytes(message, encoding='utf8') if not isinstance(
message,
bytes
) else message
signature = str(
base64.b64encode(self.sign_bdata(private_key, data_to_sign)),
encoding='utf8'
)
return signature
def check_sign_bdata(self, public_key, bdata, sign):
try:
r = public_key.verify(sign, bdata,
padding.PSS(
mgf=padding.MGF1(hashes.SHA256()),
salt_length=padding.PSS.MAX_LENGTH
),
hashes.SHA256()
)
# print('verify return=', r) r is None
return True
except InvalidSignature as e:
return False
def check_sign(self,public_key,plain_text,signature):
plain_text_bytes = bytes(
plain_text,
encoding='utf8'
) if not isinstance(plain_text, bytes) else plain_text
signature = base64.b64decode(
signature
) if not isinstance(signature, bytes) else signature
return self.check_sign_bdata(public_key, plain_text_bytes, \
signature)
if __name__ == '__main__':
import os
prikey1_file = os.path.join(os.path.dirname(__file__),'..','test', 'prikey1.rsa')
r = RSA()
mpri = r.create_privatekey(4096)
mpub = r.create_publickey(mpri)
zpri = r.create_privatekey(4096)
zpub = r.create_publickey(zpri)
l = 100
while True:
text = 'h' * l
cipher = r.encode(mpub,text)
ntext = r.decode(mpri,cipher)
print('textlen=', l, 'encode text=', text, \
'decode result=', ntext,
'cyber size=', len(cipher),
'check if equal=', text==ntext)
signature = r.sign(zpri,text)
check = r.check_sign(zpub,text,signature)
print('sign and verify=',len(signature),check)
l += 1

105
appPublic/rsawrap.py Normal file
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@ -0,0 +1,105 @@
import rsa
class RSA:
def __init__(self, keylength=4096, coding='iso8859'):
self.coding = coding
self.keylength = keylength
def write_privatekey(self,private_key,fname,password=None):
bd = private_key.save_pkcs1()
with open(fname, 'wb') as f:
f.write(bd)
def publickeyText(self,public_key):
bd = public_key.save_pkcs1()
return bd.encode(self.coding)
def write_publickey(self,public_key,fname):
bd = public_key.save_pkcs1()
with open(fname, 'wb') as f:
f.write(bd)
def read_privatekey(self,fname,password=None):
with open(fname, 'rb') as pf:
kd = pf.read()
return rsa.PrivateKey.load_pkcs1(kd)
def publickeyFromText(self,text):
bd = text.encode(self.coding)
rsa.PublicKey.load_pkcs1(bd)
def read_publickey(self,fname):
with open(fname, 'rb') as pf:
kd = pf.read()
return rsa.PublicKey.load_pkcs1(kd)
def create_privatekey(self, keylength=4096):
_, prik = rsa.newkeys(keylength)
return prik
def create_publickey(self,private_key):
return rsa.PublicKey(private_key.n, private_key.e)
def encode_bytes(self, public_key, bdata):
return rsa.encrypt(bdata, public_key)
def encode(self,public_key,text):
bdata = text.encode(self.coding)
bc = self.encode_bytes(public_key, bdata)
return bc.decode(self.coding)
def decode_bytes(self, private_key, bdata):
return rsa.decrypt(bdata, private_key)
def decode(self,private_key,cipher):
bc = cipher.encode(self.coding)
bd = self.decode_bytes(private_key, bc)
return bd.decode(self.coding)
def sign_bdata(self, private_key, data_to_sign):
return rsa.sign(data_to_sign, private_key, 'SHA-1')
def sign(self,private_key,message):
bd = message.encode(self.coding)
bs = self.sign_bdata(private_key, bd)
return bs.decode(self.coding)
def check_sign_bdata(self, public_key, bdata, sign):
try:
r = rsa.verify(bdata, sign, public_key)
if r == 'SHA-1':
return True
except:
return False
def check_sign(self,public_key,plain_text,signature):
bd = plain_text.encode(self.coding)
bs = signature.encode(self.coding)
return self.check_sign_bdata(public_key, bd, bs)
if __name__ == '__main__':
import os
prikey1_file = os.path.join(os.path.dirname(__file__),'..','test', 'prikey1.rsa')
r = RSA()
mpri = r.create_privatekey(2048)
mpub = r.create_publickey(mpri)
zpri = r.create_privatekey(2048)
zpub = r.create_publickey(zpri)
l = 100
while True:
text = 'h' * l
cipher = r.encode(mpub,text)
ntext = r.decode(mpri,cipher)
print('textlen=', l, 'encode text=', text, \
'decode result=', ntext,
'cyber size=', len(cipher),
'check if equal=', text==ntext)
signature = r.sign(zpri,text)
check = r.check_sign(zpub,text,signature)
print('sign and verify=',len(signature),check)
l += 1