buffer_md5(buffer, offset, size);
| Argument | Description |
|---|---|
| buffer | The index of the buffer to use. |
| offset | The data offset value. |
| size | The size of the buffer. |
Returns: String
In cryptography, MD5 (Message-Digest algorithm 5) is a widely
used cryptographic hash function with a 128-bit hash value and has
been employed in a wide variety of security applications. It is
also commonly used to check the integrity of data. This function
will take the input data from a given buffer (or part of the
buffer) and return the 32-character hexadecimal MD5 hash that is
unique to that data. In this way you can generate a secure key
which can be stored and used to check the integrity of the
information being sent to (or received from) an external server
(for example). When applying this to buffers using this function
you must specify the buffer id of the buffer to use, then an offset
value (in bytes) for where to begin, and then a size (again in
bytes) for the region to be hashed.
check_string = buffer_md5(buff, 0, buffer_get_size(buff));
The above code will create an md5 hash for the full data stored in the buffer indexed by the variable "buff", and store the returned hash in the variable "check_string".