signature/python/alibabacloud_darabonba_signature_util/signer.py [114:124]:
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        string_to_sign = string_to_sign.encode('utf-8')
        secret = secret.encode('utf-8')
        if not secret.startswith(b'-----BEGIN RSA PRIVATE KEY-----'):
            secret = b'-----BEGIN RSA PRIVATE KEY-----\n%s' % secret
        if not secret.endswith(b'-----END RSA PRIVATE KEY-----'):
            secret = b'%s\n-----END RSA PRIVATE KEY-----' % secret

        key = load_pem_private_key(secret, password=None, backend=default_backend())
        return key.sign(string_to_sign, padding.PKCS1v15(), hashes.SHA256())
    
    @staticmethod
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signature/python2/alibabacloud_darabonba_signature_util/signer.py [124:134]:
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        string_to_sign = string_to_sign.encode('utf-8')
        secret = secret.encode('utf-8')
        if not secret.startswith(b'-----BEGIN RSA PRIVATE KEY-----'):
            secret = b'-----BEGIN RSA PRIVATE KEY-----\n%s' % secret
        if not secret.endswith(b'-----END RSA PRIVATE KEY-----'):
            secret = b'%s\n-----END RSA PRIVATE KEY-----' % secret

        key = load_pem_private_key(secret, password=None, backend=default_backend())
        return key.sign(string_to_sign, padding.PKCS1v15(), hashes.SHA256())

    @staticmethod
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