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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsISupports.idl"
interface nsIInputStream;
%{C++
#include "mozilla/AlreadyAddRefed.h"
%}
/**
* nsICryptoHash
* This interface provides crytographic hashing algorithms.
*/
[builtinclass, scriptable, uuid(1e5b7c43-4688-45ce-92e1-77ed931e3bbe)]
interface nsICryptoHash : nsISupports
{
/**
* Hashing Algorithms. These values are to be used by the
* |init| method to indicate which hashing function to
* use. These values must be identical to the values defined
* in security/nss/lib/util/hasht.h in type HASH_HashType.
* This allows us to use NSS mapping functions like
* HASH_GetHashOidTagByHashType with these values.
*/
const short MD5 = 2; /* String value: "md5" */
const short SHA1 = 3; /* String value: "sha1" */
const short SHA256 = 4; /* String value: "sha256" */
const short SHA384 = 5; /* String value: "sha384" */
const short SHA512 = 6; /* String value: "sha512" */
/**
* Initialize the hashing object. This method may be
* called multiple times with different algorithm types.
*
* @param aAlgorithm the algorithm type to be used.
* This value must be one of the above valid
* 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.
*/
void init(in unsigned long aAlgorithm);
/**
* Initialize the hashing object. This method may be
* called multiple times with different algorithm types.
*
* @param aAlgorithm the algorithm type to be used.
*
* @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.
*/
[must_use]
void initWithString(in ACString aAlgorithm);
/**
* @param aData a buffer to calculate the hash over
*
* @param aLen the length of the buffer |aData|
*
* @throws NS_ERROR_NOT_INITIALIZED If |init| has not been called.
*/
void update([const, array, size_is(aLen)] in octet aData, in unsigned long aLen);
/**
* Calculates and updates a new hash based on a given data stream.
*
* @param aStream an input stream to read from.
*
* @param aLen How much to read from the given |aStream|. Passing UINT32_MAX
* indicates that all data available will be used to update the hash.
*
* @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.
*
*/
[must_use]
void updateFromStream(in nsIInputStream aStream, in unsigned long aLen);
/**
* Completes this hash object and produces the actual hash data.
*
* @param aASCII If true then the returned value is a base64 encoded string.
* If false, then the returned value is binary data.
*
* @return a hash of the data that was read by this object. This can
* be either binary data or base 64 encoded.
*
* @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.
*/
ACString finish(in boolean aASCII);
};
%{C++
already_AddRefed<nsICryptoHash> NS_NewCryptoHash();
nsresult NS_NewCryptoHash(uint32_t aHashType, nsICryptoHash** aOutHasher);
nsresult NS_NewCryptoHash(const nsACString& aHashType, nsICryptoHash** aOutHasher);
%}
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