/** * Create an InputStream instance that wraps another stream and that computes the secure hash (using the algorithm with the * supplied name) as the returned stream is used. This can be used to compute the hash of a stream while the stream is being * processed by another reader, and saves from having to process the same stream twice. * * @param digestName the name of the hashing function (or {@link MessageDigest message digest}) that should be used * @param inputStream the stream containing the content that is to be hashed * @return the hash of the contents as a byte array * @throws NoSuchAlgorithmException */ public static HashingInputStream createHashingStream( String digestName, InputStream inputStream ) throws NoSuchAlgorithmException { MessageDigest digest = MessageDigest.getInstance(digestName); return new HashingInputStream(digest, inputStream); }
/** * Create an InputStream instance that wraps another stream and that computes the secure hash (using the algorithm with the * supplied name) as the returned stream is used. This can be used to compute the hash of a stream while the stream is being * processed by another reader, and saves from having to process the same stream twice. * * @param digestName the name of the hashing function (or {@link MessageDigest message digest}) that should be used * @param inputStream the stream containing the content that is to be hashed * @return the hash of the contents as a byte array * @throws NoSuchAlgorithmException */ public static HashingInputStream createHashingStream( String digestName, InputStream inputStream ) throws NoSuchAlgorithmException { MessageDigest digest = MessageDigest.getInstance(digestName); return new HashingInputStream(digest, inputStream); }
/** * Create an InputStream instance that wraps another stream and that computes the secure hash (using the algorithm with the * supplied name) as the returned stream is used. This can be used to compute the hash of a stream while the stream is being * processed by another reader, and saves from having to process the same stream twice. * * @param digestName the name of the hashing function (or {@link MessageDigest message digest}) that should be used * @param inputStream the stream containing the content that is to be hashed * @return the hash of the contents as a byte array * @throws NoSuchAlgorithmException */ public static HashingInputStream createHashingStream( String digestName, InputStream inputStream ) throws NoSuchAlgorithmException { MessageDigest digest = MessageDigest.getInstance(digestName); return new HashingInputStream(digest, inputStream); }