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def encrypt_RSA(public_key_loc, message):
    '''
    param: public_key_loc Path to public key
    param: message String to be encrypted
    return base64 encoded encrypted string
    '''
    from Crypto.PublicKey import RSA
    from Crypto.Cipher import PKCS1_OAEP
    key = open(public_key_loc, "r").read()
    rsakey = RSA.importKey(key)

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def encrypt_RSA(public_key_loc, message):
    '''
    param: public_key_loc Path to public key
    param: message String to be encrypted
    return base64 encoded encrypted string
    '''
    from M2Crypto import RSA, BIO 
    key = open(public_key_loc, "r").read() 
    pubkey = str(key).encode('utf8') 
    bio = BIO.MemoryBuffer(pubkey) 

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def decrypt_RSA(private_key_loc, package):
    '''
    param: public_key_loc Path to your private key
    param: package String to be decrypted
    return decrypted string
    '''
    from Crypto.PublicKey import RSA 
    from Crypto.Cipher import PKCS1_OAEP 
    from base64 import b64decode 
    key = open(private_key_loc, "r").read() 

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def sign_data(private_key_loc, data):
    '''
    param: private_key_loc Path to your private key
    param: package Data to be signed
    return: base64 encoded signature
    '''
    from Crypto.PublicKey import RSA 
    from Crypto.Signature import PKCS1_v1_5 
    from Crypto.Hash import SHA256 
    from base64 import b64encode, b64decode 

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def verify_sign(public_key_loc, signature, data):
    '''
    Verifies with a public key from whom the data came that it was indeed 
    signed by their private key
    param: public_key_loc Path to public key
    param: signature String signature to be verified
    return: Boolean. True if the signature is valid; False otherwise. 
    '''
    from Crypto.PublicKey import RSA 
    from Crypto.Signature import PKCS1_v1_5 

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def generate_RSA(bits=2048):
    '''
    Generate an RSA keypair with an exponent of 65537 in PEM format
    param: bits The key length in bits
    Return private key and public key
    '''
    from Crypto.PublicKey import RSA 
    new_key = RSA.generate(bits, e=65537) 
    public_key = new_key.publickey().exportKey("PEM") 
    private_key = new_key.exportKey("PEM") 

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def decrypt_RSA(private_key_loc, package):
    '''
    param: public_key_loc Path to your private key
    param: package String to be decrypted
    return decrypted string
    '''
    from base64 import b64decode 
    from M2Crypto import BIO, RSA 
    key = open(private_key_loc, "r").read() 
    priv_key = BIO.MemoryBuffer(key.encode('utf8')) 

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def generate_RSA(bits=2048):
    '''
    Generate an RSA keypair with an exponent of 65537 in PEM format
    param: bits The key length in bits
    Return private key and public key
    '''
    from M2Crypto import RSA, BIO
    new_key = RSA.gen_key(bits, 65537)
    memory = BIO.MemoryBuffer()
    new_key.save_key_bio(memory, cipher=None)

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require 'openssl' 
	def encrypt_RSA(key, message='my plaintext string')
	key.public_encrypt(message, OpenSSL::PKey::RSA::PKCS1_OAEP_PADDING)
end

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require 'openssl' 
	def decrypt_RSA(key, package)
	key.private_decrypt(package, OpenSSL::PKey::RSA::PKCS1_OAEP_PADDING)
end