nsICryptoHash
This interface provides crytographic hashing algorithms.
Initialize the hashing object. This method may be
called multiple times with different algorithm types.
@throws NS_ERROR_INVALID_ARG if an unsupported algorithm
type is passed.
NOTE: This method or initWithString must be called
before any other method on this interface is called.
| aAlgorithm | the algorithm type to be used. This value must be one of the above valid algorithm types. |
Initialize the hashing object. This method may be
called multiple times with different algorithm types.
@throws NS_ERROR_INVALID_ARG if an unsupported algorithm
type is passed.
NOTE: This method or init must be called before any
other method on this interface is called.
| aAlgorithm | the algorithm type to be used. |
@throws NS_ERROR_NOT_INITIALIZED if |init| has not been
called.
| aData | a buffer to calculate the hash over |
| aLen | the length of the buffer |aData| |
Calculates and updates a new hash based on a given data stream.
@throws NS_ERROR_NOT_INITIALIZED if |init| has not been
called.
@throws NS_ERROR_NOT_AVAILABLE if the requested amount of
data to be calculated into the hash is not available.
| aStream | an input stream to read from. |
| aLen | how much to read from the given |aStream|. Passing UINT32_MAX indicates that all data available will be used to update the hash. |
Completes this hash object and produces the actual hash data.
@throws NS_ERROR_NOT_INITIALIZED if |init| has not been
called.
NOTE: This method may be called any time after |init|
is called. This call resets the object to its
pre-init state.
| aASCII | if true then the returned value is a base-64 encoded string. if false, then the returned value is binary data. |
| a hash of the data that was read by this object. This can be either binary data or base 64 encoded. |
Hashing Algorithms. These values are to be used by the
|init| method to indicate which hashing function to
use. These values map directly onto the values defined
in mozilla/security/nss/lib/cryptohi/hasht.h.