Question

I am a newbie in Python. I try to work with server using Thrift protocol

struct AuthSalt {
    1: required i64 client,   /* random data */
    2: required i64 server,   /* data from previous answer */
}

struct AuthRequest {
    1: required AuthSalt bootstrap,
    2: required string who,           /* login */
    3: required string signature,     /* SHA-1: bootstrap + password + who + bootstrap. */
}

exception NotAuthorisedException {
    1: required string description
}

service Bookworm {
    AuthResponse Authenticate( 1: required AuthRequest a, 2: required string locale )
        throws ( 1: NotAuthorisedException e )
}

I need to create SHA1 digest using this algoritm: bootstrap + password + who + bootstrap.

To create bootstrap I use this:

dig = hashlib.sha1
bootstrap = AuthSalt(0, 0)
dig.update(bootstrap)
dig.update(password + who)
dig.update(bootstrap)

But update method argument type only string and I can’t understand how to convert bootstrap to a string.

In C++ this code looks like:

SHA_CTX c;
            ::SHA1_Init(&c);
            ::SHA1_Update(&c, &bootstrap, sizeof(bootstrap));
            ::SHA1_Update(&c, password.c_str(), password.size());
            ::SHA1_Update(&c, who.c_str(), who.size());
            ::SHA1_Update(&c, &bootstrap, sizeof(bootstrap));
            ::SHA1_Final(digest, &c);

Can someone explain how to do it using python?

Thanks in advance!

Answer 1

This is what I was need:

for x in tuple(struct.pack("Q",bootstrap.client)):
  dig.update(x)

Convert i64 into 8 bytes and update hash with every byte