- clean working copy for leaving SVN

2022-06-28 19:04:46 +02:00
parent 62a2d47cb3
commit 762b8f0e7d
1966 changed files with 699872 additions and 126 deletions
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+/*
+  ==============================================================================
+
+   This file is part of the JUCE library.
+   Copyright (c) 2013 - Raw Material Software Ltd.
+
+   Permission is granted to use this software under the terms of either:
+   a) the GPL v2 (or any later version)
+   b) the Affero GPL v3
+
+   Details of these licenses can be found at: www.gnu.org/licenses
+
+   JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
+   WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+   A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+   ------------------------------------------------------------------------------
+
+   To release a closed-source product which uses JUCE, commercial licenses are
+   available: visit www.juce.com for more information.
+
+  ==============================================================================
+*/
+
+#ifndef JUCE_SHA256_H_INCLUDED
+#define JUCE_SHA256_H_INCLUDED
+
+
+//==============================================================================
+/**
+    SHA-256 secure hash generator.
+
+    Create one of these objects from a block of source data or a stream, and it
+    calculates the SHA-256 hash of that data.
+
+    You can retrieve the hash as a raw 32-byte block, or as a 64-digit hex string.
+    @see MD5
+*/
+class JUCE_API  SHA256
+{
+public:
+    //==============================================================================
+    /** Creates an empty SHA256 object.
+        The default constructor just creates a hash filled with zeros. (This is not
+        equal to the hash of an empty block of data).
+    */
+    SHA256() noexcept;
+
+    /** Destructor. */
+    ~SHA256() noexcept;
+
+    /** Creates a copy of another SHA256. */
+    SHA256 (const SHA256& other) noexcept;
+
+    /** Copies another SHA256. */
+    SHA256& operator= (const SHA256& other) noexcept;
+
+    //==============================================================================
+    /** Creates a hash from a block of raw data. */
+    explicit SHA256 (const MemoryBlock& data);
+
+    /** Creates a hash from a block of raw data. */
+    SHA256 (const void* data, size_t numBytes);
+
+    /** Creates a hash from the contents of a stream.
+
+        This will read from the stream until the stream is exhausted, or until
+        maxBytesToRead bytes have been read. If maxBytesToRead is negative, the entire
+        stream will be read.
+    */
+    SHA256 (InputStream& input, int64 maxBytesToRead = -1);
+
+    /** Reads a file and generates the hash of its contents.
+        If the file can't be opened, the hash will be left uninitialised (i.e. full
+        of zeros).
+    */
+    explicit SHA256 (const File& file);
+
+    /** Creates a checksum from a UTF-8 buffer.
+        E.g.
+        @code SHA256 checksum (myString.toUTF8());
+        @endcode
+    */
+    explicit SHA256 (CharPointer_UTF8 utf8Text) noexcept;
+
+    //==============================================================================
+    /** Returns the hash as a 32-byte block of data. */
+    MemoryBlock getRawData() const;
+
+    /** Returns the checksum as a 64-digit hex string. */
+    String toHexString() const;
+
+    //==============================================================================
+    bool operator== (const SHA256&) const noexcept;
+    bool operator!= (const SHA256&) const noexcept;
+
+
+private:
+    //==============================================================================
+    uint8 result [32];
+    void process (const void*, size_t);
+
+    JUCE_LEAK_DETECTOR (SHA256)
+};
+
+
+#endif   // JUCE_SHA256_H_INCLUDED