 |
VOOZH | about |
|
VOOZH | about |
Whirlpool is a cryptographic hash function designed by Vincent Rijmen and Paulo S. L. M. Barreto. It generates a 512-bit hash value, making it suitable for secure hashing.
A hash function converts input data into a fixed-length output called a hash value. It is widely used in data integrity, password storage and cryptography. The same input always produces the same hash, while even a small change in input generates a completely different output.
Whirlpool processes input data of variable length and produces a fixed 512-bit hash value. The algorithm went through multiple versions:
Internally, Whirlpool operates on a 512-bit state represented as an 8 × 8 byte matrix. The state is updated in multiple rounds using four main operations:
| Operation Name | Function |
|---|---|
| Substitute Bytes (SB) | Applies non-linear transformation using a lookup table |
| Shift Columns (SC) | Rearranges data by shifting columns |
| Mix Rows (MR) | Mixes data using matrix multiplication |
| Add Round Key (AK) | Combines data with a round key using XOR |
Whirlpool processes the input data in multiple rounds. In each round, the internal state (represented as an 8 × 8 matrix) is updated by applying a sequence of transformations. These transformations are the core operations of the algorithm and are repeated multiple times to produce the final hash value.
The transformation can be represented as:
State = MR ∘ AK ∘ SC ∘ SB (State)
Install the Whirlpool library using:
pip install whirlpool
Note: Whirlpool library may require additional system dependencies (such as C++ build tools) to install successfully. If installation fails, ensure the required compilers are installed on your system.
Example 1: In this example, a string is converted into its Whirlpool hash value.
Output
95cb4d2d765eb26a922b3ade5a5837a3bc6b18f9a68cec6392f7bf4284c996dd...
Explanation: whirlpool.new(s) creates hash object and hexdigest() returns hash in hexadecimal format
Example 2: In this example, additional data is added to the existing hash using the update method.
Output
c3a2aea5a2b487f1a3ee848870dff8ca5af0adcf7eae2a58b40927e87027918c...
Explanation: update() adds more data to the hash
