Hash Functions
- Yeok Hong Ng
Use the functions below to turn bytearray input of arbitrary length into an output of fixed length
The following functions for Hash described here are:
hashDigest
Completes the hash computation by performing final operations such as padding. After this call is made the digest is reset.
bytearray hashDigest();Parameter | Description |
|---|---|
Returns | A hexadecimal hash sum |
hashReset
Resets the digest for further use.
void hashReset();Parameter | Description |
|---|---|
Returns | Nothing |
hashUpdate
Updates the digest using the specified array of bytes.
void hashUpdate(bytearray);Parameter | Description |
|---|---|
| Any type of bytearray |
Returns | Nothing |
hashSetAlgorithm
Uses a digest that implements the specified digest algorithm.
Note!
The default setting, that is if the algorithm is not set, the SHA-1 hash method is used.
Parameter | Description |
|---|---|
| The name of the algorithm requested. Supported hash algorithms are: MD2, MD5, SHA-1, SHA-256, SHA-384, SHA-512 |
Returns | Nothing. |
hashSetAlgorithmFromProvider
Uses a digest that implements the specified digest algorithm, as supplied from the specified provider. The digest will be reset.
Parameter | Description |
|---|---|
| The name of the hash algorithm developed by the provider |
| The name of the provider |
Returns | Nothing |
Hash Example
Example - Hash
initialize { hashSetAlgorithm("MD2"); } beginBatch { hashReset(); } consume { hashUpdate(input); } drain { bytearray hashsum = hashDigest(); string sHashSum = baToHexString(hashsum); // Optional bytearray result; // Optional strToBA(result, sHashSum); // Optional udrRoute(result); }
Note!
The optional parts in the example are added to convert the hash sum to a more readable form.