Update hashing library (#384)

third_party/hashing/hashers/crc32.cpp

@@ -1,6 +1,6 @@
 // //////////////////////////////////////////////////////////
 // crc32.cpp
-// Copyright (c) 2014 Stephan Brumme. All rights reserved.
+// Copyright (c) 2014,2015 Stephan Brumme. All rights reserved.
 // see http://create.stephan-brumme.com/disclaimer.html
 //
 
@@ -374,7 +374,7 @@ void CRC32::add(const void* data, size_t numBytes)
 }
 
 
-/// return latest hash as 16 hex characters
+/// return latest hash as 8 hex characters
 const char* CRC32::getHash()
 {
   // convert hash to string
@@ -390,12 +390,21 @@ const char* CRC32::getHash()
   hashBuffer[5] = dec2hex[(m_hash >>  8) & 15];
   hashBuffer[6] = dec2hex[(m_hash >>  4) & 15];
   hashBuffer[7] = dec2hex[ m_hash        & 15];
-
   // zero-terminated string
   hashBuffer[8] = 0;
 
   // convert to std::string
-  return (const char *)hashBuffer;
+  return const_cast<const char *>(hashBuffer);
+}
+
+
+/// return latest hash as bytes
+void CRC32::getHash(unsigned char buffer[CRC32::HashBytes])
+{
+  buffer[0] = (m_hash >> 24) & 0xFF;
+  buffer[1] = (m_hash >> 16) & 0xFF;
+  buffer[2] = (m_hash >>  8) & 0xFF;
+  buffer[3] =  m_hash        & 0xFF;
 }
 
 

third_party/hashing/hashers/crc32.h

@@ -1,6 +1,6 @@
 // //////////////////////////////////////////////////////////
 // crc32.h
-// Copyright (c) 2014 Stephan Brumme. All rights reserved.
+// Copyright (c) 2014,2015 Stephan Brumme. All rights reserved.
 // see http://create.stephan-brumme.com/disclaimer.html
 //
 
@@ -20,10 +20,18 @@
     while (more data available)
       crc32.add(pointer to fresh data, number of new bytes);
     std::string myHash3 = crc32.getHash();
+
+    Note:
+    You can find code for the faster Slicing-by-16 algorithm on my website, too:
+    http://create.stephan-brumme.com/crc32/
+    Its unrolled version is about twice as fast but its look-up table doubled in size as well.
   */
 class CRC32 //: public Hash
 {
 public:
+  /// hash is 4 bytes long
+  enum { HashBytes = 4 };
+
   /// same as reset()
   CRC32();
 
@@ -35,8 +43,10 @@ public:
   /// add arbitrary number of bytes
   void add(const void* data, size_t numBytes);
 
-  /// return latest hash as 16 hex characters
+  /// return latest hash as 8 hex characters
   const char* getHash();
+  /// return latest hash as bytes
+  void        getHash(unsigned char buffer[HashBytes]);
 
   /// restart
   void reset();

third_party/hashing/hashers/keccak.cpp

@@ -1,6 +1,6 @@
 // //////////////////////////////////////////////////////////
 // keccak.cpp
-// Copyright (c) 2014 Stephan Brumme. All rights reserved.
+// Copyright (c) 2014,2015 Stephan Brumme. All rights reserved.
 // see http://create.stephan-brumme.com/disclaimer.html
 //
 
@@ -225,11 +225,11 @@ void Keccak::processBuffer()
   // add a "1" byte
   m_buffer[offset++] = 1;
   // fill with zeros
-  while (offset < blockSize - 1)
+  while (offset < blockSize)
     m_buffer[offset++] = 0;
 
   // and add a single set bit
-  m_buffer[blockSize - 1] = 0x80;
+  m_buffer[blockSize - 1] |= 0x80;
 
   processBlock(m_buffer);
 }
@@ -257,8 +257,21 @@ const char* Keccak::getHash()
       result[written++] = dec2hex[oneByte >> 4];
       result[written++] = dec2hex[oneByte & 15];
     }
+
+  // Keccak224's last entry in m_hash provides only 32 bits instead of 64 bits
+  unsigned int remainder = m_bits - hashLength * 64;
+  unsigned int processed = 0;
+  while (processed < remainder)
+  {
+    // convert a byte to hex
+    unsigned char oneByte = (unsigned char) (m_hash[hashLength] >> processed);
+    result[written++] = dec2hex[oneByte >> 4];
+    result[written++] = dec2hex[oneByte & 15];
+
+    processed += 8;
+  }
   result[written] = 0;
-  return (const char *)result;
+  return const_cast<const char *>(result);
 }
 
 

third_party/hashing/hashers/keccak.h

@@ -1,6 +1,6 @@
 // //////////////////////////////////////////////////////////
 // keccak.h
-// Copyright (c) 2014 Stephan Brumme. All rights reserved.
+// Copyright (c) 2014,2015 Stephan Brumme. All rights reserved.
 // see http://create.stephan-brumme.com/disclaimer.html
 //
 

third_party/hashing/hashers/md5.cpp

@@ -1,6 +1,6 @@
 // //////////////////////////////////////////////////////////
 // md5.cpp
-// Copyright (c) 2014 Stephan Brumme. All rights reserved.
+// Copyright (c) 2014,2015 Stephan Brumme. All rights reserved.
 // see http://create.stephan-brumme.com/disclaimer.html
 //
 
@@ -311,72 +311,49 @@ void MD5::processBuffer()
 }
 
 
-/// return latest hash as 16 hex characters
+/// return latest hash as 32 hex characters
 const char* MD5::getHash()
 {
-  // convert hash to string
+  // compute hash (as raw bytes)
-  static const char dec2hex[16+1] = "0123456789abcdef";
+  unsigned char rawHash[HashBytes];
+  getHash(rawHash);
 
+  // convert to hex string
+  static char result[32+1];
+  size_t written = 0;
+  for (int i = 0; i < HashBytes; i++)
+  {
+    static const char dec2hex[16+1] = "0123456789abcdef";
+    result[written++] = dec2hex[(rawHash[i] >> 4) & 15];
+    result[written++] = dec2hex[ rawHash[i]       & 15];
+  }
+  result[written] = 0;
+  return const_cast<const char *>(result);
+}
+
+
+/// return latest hash as bytes
+void MD5::getHash(unsigned char buffer[MD5::HashBytes])
+{
   // save old hash if buffer is partially filled
-  uint32_t oldHash[4];
+  uint32_t oldHash[HashValues];
-  oldHash[0] = m_hash[0];
+  for (int i = 0; i < HashValues; i++)
-  oldHash[1] = m_hash[1];
+    oldHash[i] = m_hash[i];
-  oldHash[2] = m_hash[2];
-  oldHash[3] = m_hash[3];
 
   // process remaining bytes
   processBuffer();
 
-  // create hash string
+  unsigned char* current = buffer;
-  static char hashBuffer[4*8+1];
+  for (int i = 0; i < HashValues; i++)
-
+  {
-  hashBuffer[ 0] = dec2hex[(m_hash[0] >>  4) & 15];
+    *current++ =  m_hash[i]        & 0xFF;
-  hashBuffer[ 1] = dec2hex[ m_hash[0]        & 15];
+    *current++ = (m_hash[i] >>  8) & 0xFF;
-  hashBuffer[ 2] = dec2hex[(m_hash[0] >> 12) & 15];
+    *current++ = (m_hash[i] >> 16) & 0xFF;
-  hashBuffer[ 3] = dec2hex[(m_hash[0] >>  8) & 15];
+    *current++ = (m_hash[i] >> 24) & 0xFF;
-  hashBuffer[ 4] = dec2hex[(m_hash[0] >> 20) & 15];
-  hashBuffer[ 5] = dec2hex[(m_hash[0] >> 16) & 15];
-  hashBuffer[ 6] = dec2hex[ m_hash[0] >> 28      ];
-  hashBuffer[ 7] = dec2hex[(m_hash[0] >> 24) & 15];
-
-  hashBuffer[ 8] = dec2hex[(m_hash[1] >>  4) & 15];
-  hashBuffer[ 9] = dec2hex[ m_hash[1]        & 15];
-  hashBuffer[10] = dec2hex[(m_hash[1] >> 12) & 15];
-  hashBuffer[11] = dec2hex[(m_hash[1] >>  8) & 15];
-  hashBuffer[12] = dec2hex[(m_hash[1] >> 20) & 15];
-  hashBuffer[13] = dec2hex[(m_hash[1] >> 16) & 15];
-  hashBuffer[14] = dec2hex[ m_hash[1] >> 28      ];
-  hashBuffer[15] = dec2hex[(m_hash[1] >> 24) & 15];
-
-  hashBuffer[16] = dec2hex[(m_hash[2] >>  4) & 15];
-  hashBuffer[17] = dec2hex[ m_hash[2]        & 15];
-  hashBuffer[18] = dec2hex[(m_hash[2] >> 12) & 15];
-  hashBuffer[19] = dec2hex[(m_hash[2] >>  8) & 15];
-  hashBuffer[20] = dec2hex[(m_hash[2] >> 20) & 15];
-  hashBuffer[21] = dec2hex[(m_hash[2] >> 16) & 15];
-  hashBuffer[22] = dec2hex[ m_hash[2] >> 28      ];
-  hashBuffer[23] = dec2hex[(m_hash[2] >> 24) & 15];
-
-  hashBuffer[24] = dec2hex[(m_hash[3] >>  4) & 15];
-  hashBuffer[25] = dec2hex[ m_hash[3]        & 15];
-  hashBuffer[26] = dec2hex[(m_hash[3] >> 12) & 15];
-  hashBuffer[27] = dec2hex[(m_hash[3] >>  8) & 15];
-  hashBuffer[28] = dec2hex[(m_hash[3] >> 20) & 15];
-  hashBuffer[29] = dec2hex[(m_hash[3] >> 16) & 15];
-  hashBuffer[30] = dec2hex[ m_hash[3] >> 28      ];
-  hashBuffer[31] = dec2hex[(m_hash[3] >> 24) & 15];
-
-  // zero-terminated string
-  hashBuffer[32] = 0;
 
     // restore old hash
-  m_hash[0] = oldHash[0];
+    m_hash[i] = oldHash[i];
-  m_hash[1] = oldHash[1];
+  }
-  m_hash[2] = oldHash[2];
-  m_hash[3] = oldHash[3];
-
-  // convert to std::string
-  return (const char*)hashBuffer;
 }
 
 

third_party/hashing/hashers/md5.h

@@ -24,6 +24,9 @@
 class MD5 //: public Hash
 {
 public:
+  /// split into 64 byte blocks (=> 512 bits), hash is 16 bytes long
+  enum { BlockSize = 512 / 8, HashBytes = 16 };
+
   /// same as reset()
   MD5();
 
@@ -35,8 +38,10 @@ public:
   /// add arbitrary number of bytes
   void add(const void* data, size_t numBytes);
 
-  /// return latest hash as 16 hex characters
+  /// return latest hash as 32 hex characters
   const char* getHash();
+  /// return latest hash as bytes
+  void        getHash(unsigned char buffer[HashBytes]);
 
   /// restart
   void reset();
@@ -47,15 +52,14 @@ private:
   /// process everything left in the internal buffer
   void processBuffer();
 
-  /// split into 64 byte blocks (=> 512 bits)
-  enum { BlockSize = 512 / 8 };
-
   /// size of processed data in bytes
   uint64_t m_numBytes;
   /// valid bytes in m_buffer
   size_t   m_bufferSize;
   /// bytes not processed yet
   uint8_t  m_buffer[BlockSize];
+
+  enum { HashValues = HashBytes / 4 };
   /// hash, stored as integers
-  uint32_t m_hash[4];
+  uint32_t m_hash[HashValues];
 };

third_party/hashing/hashers/sha1.cpp

@@ -1,6 +1,6 @@
 // //////////////////////////////////////////////////////////
 // sha1.cpp
-// Copyright (c) 2014 Stephan Brumme. All rights reserved.
+// Copyright (c) 2014,2015 Stephan Brumme. All rights reserved.
 // see http://create.stephan-brumme.com/disclaimer.html
 //
 
@@ -239,14 +239,14 @@ void SHA1::processBuffer()
     addLength = extra + paddedLength - BlockSize;
 
   // must be big endian
-  *addLength++ = (msgBits >> 56) & 0xFF;
+  *addLength++ = (unsigned char)((msgBits >> 56) & 0xFF);
-  *addLength++ = (msgBits >> 48) & 0xFF;
+  *addLength++ = (unsigned char)((msgBits >> 48) & 0xFF);
-  *addLength++ = (msgBits >> 40) & 0xFF;
+  *addLength++ = (unsigned char)((msgBits >> 40) & 0xFF);
-  *addLength++ = (msgBits >> 32) & 0xFF;
+  *addLength++ = (unsigned char)((msgBits >> 32) & 0xFF);
-  *addLength++ = (msgBits >> 24) & 0xFF;
+  *addLength++ = (unsigned char)((msgBits >> 24) & 0xFF);
-  *addLength++ = (msgBits >> 16) & 0xFF;
+  *addLength++ = (unsigned char)((msgBits >> 16) & 0xFF);
-  *addLength++ = (msgBits >>  8) & 0xFF;
+  *addLength++ = (unsigned char)((msgBits >>  8) & 0xFF);
-  *addLength   =  msgBits        & 0xFF;
+  *addLength   = (unsigned char)( msgBits        & 0xFF);
 
   // process blocks
   processBlock(m_buffer);
@@ -256,12 +256,30 @@ void SHA1::processBuffer()
 }
 
 
-/// return latest hash as 16 hex characters
+/// return latest hash as 40 hex characters
 const char* SHA1::getHash()
 {
-  // convert hash to string
+  // compute hash (as raw bytes)
-  static const char dec2hex[16+1] = "0123456789abcdef";
+  unsigned char rawHash[HashBytes];
+  getHash(rawHash);
 
+  // convert to hex string
+  static char result[40+1];
+  size_t written = 0;
+  for (int i = 0; i < HashBytes; i++)
+  {
+    static const char dec2hex[16+1] = "0123456789abcdef";
+    result[written++] = dec2hex[(rawHash[i] >> 4) & 15];
+    result[written++] = dec2hex[ rawHash[i]       & 15];
+  }
+  result[written] = 0;
+  return const_cast<const char *>(result);
+}
+
+
+/// return latest hash as bytes
+void SHA1::getHash(unsigned char buffer[SHA1::HashBytes])
+{
   // save old hash if buffer is partially filled
   uint32_t oldHash[HashValues];
   for (int i = 0; i < HashValues; i++)
@@ -270,28 +288,17 @@ const char* SHA1::getHash()
   // process remaining bytes
   processBuffer();
 
-  // create hash string
+  unsigned char* current = buffer;
-  static char hashBuffer[HashValues*8+1];
-  size_t offset = 0;
   for (int i = 0; i < HashValues; i++)
   {
-    hashBuffer[offset++] = dec2hex[(m_hash[i] >> 28) & 15];
+    *current++ = (m_hash[i] >> 24) & 0xFF;
-    hashBuffer[offset++] = dec2hex[(m_hash[i] >> 24) & 15];
+    *current++ = (m_hash[i] >> 16) & 0xFF;
-    hashBuffer[offset++] = dec2hex[(m_hash[i] >> 20) & 15];
+    *current++ = (m_hash[i] >>  8) & 0xFF;
-    hashBuffer[offset++] = dec2hex[(m_hash[i] >> 16) & 15];
+    *current++ =  m_hash[i]        & 0xFF;
-    hashBuffer[offset++] = dec2hex[(m_hash[i] >> 12) & 15];
-    hashBuffer[offset++] = dec2hex[(m_hash[i] >>  8) & 15];
-    hashBuffer[offset++] = dec2hex[(m_hash[i] >>  4) & 15];
-    hashBuffer[offset++] = dec2hex[ m_hash[i]        & 15];
 
     // restore old hash
     m_hash[i] = oldHash[i];
   }
-  // zero-terminated string
-  hashBuffer[offset] = 0;
-
-  // convert to std::string
-  return (const char *)hashBuffer;
 }
 
 

third_party/hashing/hashers/sha1.h

@@ -1,6 +1,6 @@
 // //////////////////////////////////////////////////////////
 // sha1.h
-// Copyright (c) 2014 Stephan Brumme. All rights reserved.
+// Copyright (c) 2014,2015 Stephan Brumme. All rights reserved.
 // see http://create.stephan-brumme.com/disclaimer.html
 //
 
@@ -24,6 +24,9 @@
 class SHA1 //: public Hash
 {
 public:
+  /// split into 64 byte blocks (=> 512 bits), hash is 20 bytes long
+  enum { BlockSize = 512 / 8, HashBytes = 20 };
+
   /// same as reset()
   SHA1();
 
@@ -35,8 +38,10 @@ public:
   /// add arbitrary number of bytes
   void add(const void* data, size_t numBytes);
 
-  /// return latest hash as 16 hex characters
+  /// return latest hash as 40 hex characters
   const char* getHash();
+  /// return latest hash as bytes
+  void        getHash(unsigned char buffer[HashBytes]);
 
   /// restart
   void reset();
@@ -47,15 +52,14 @@ private:
   /// process everything left in the internal buffer
   void processBuffer();
 
-  /// split into 64 byte blocks (=> 512 bits)
-  enum { BlockSize = 512 / 8, HashValues = 5 };
-
   /// size of processed data in bytes
   uint64_t m_numBytes;
   /// valid bytes in m_buffer
   size_t   m_bufferSize;
   /// bytes not processed yet
   uint8_t  m_buffer[BlockSize];
+
+  enum { HashValues = HashBytes / 4 };
   /// hash, stored as integers
   uint32_t m_hash[HashValues];
 };

third_party/hashing/hashers/sha256.cpp

@@ -1,6 +1,6 @@
 // //////////////////////////////////////////////////////////
 // sha256.cpp
-// Copyright (c) 2014 Stephan Brumme. All rights reserved.
+// Copyright (c) 2014,2015 Stephan Brumme. All rights reserved.
 // see http://create.stephan-brumme.com/disclaimer.html
 //
 
@@ -325,14 +325,14 @@ void SHA256::processBuffer()
     addLength = extra + paddedLength - BlockSize;
 
   // must be big endian
-  *addLength++ = (msgBits >> 56) & 0xFF;
+  *addLength++ = (unsigned char)((msgBits >> 56) & 0xFF);
-  *addLength++ = (msgBits >> 48) & 0xFF;
+  *addLength++ = (unsigned char)((msgBits >> 48) & 0xFF);
-  *addLength++ = (msgBits >> 40) & 0xFF;
+  *addLength++ = (unsigned char)((msgBits >> 40) & 0xFF);
-  *addLength++ = (msgBits >> 32) & 0xFF;
+  *addLength++ = (unsigned char)((msgBits >> 32) & 0xFF);
-  *addLength++ = (msgBits >> 24) & 0xFF;
+  *addLength++ = (unsigned char)((msgBits >> 24) & 0xFF);
-  *addLength++ = (msgBits >> 16) & 0xFF;
+  *addLength++ = (unsigned char)((msgBits >> 16) & 0xFF);
-  *addLength++ = (msgBits >>  8) & 0xFF;
+  *addLength++ = (unsigned char)((msgBits >>  8) & 0xFF);
-  *addLength   =  msgBits        & 0xFF;
+  *addLength   = (unsigned char)( msgBits        & 0xFF);
 
   // process blocks
   processBlock(m_buffer);
@@ -342,12 +342,30 @@ void SHA256::processBuffer()
 }
 
 
-/// return latest hash as 16 hex characters
+/// return latest hash as 64 hex characters
 const char* SHA256::getHash()
 {
-  // convert hash to string
+  // compute hash (as raw bytes)
-  static const char dec2hex[16+1] = "0123456789abcdef";
+  unsigned char rawHash[HashBytes];
+  getHash(rawHash);
 
+  // convert to hex string
+  static char result[64+1];
+  size_t written = 0;
+  for (int i = 0; i < HashBytes; i++)
+  {
+    static const char dec2hex[16+1] = "0123456789abcdef";
+    result[written++] = dec2hex[(rawHash[i] >> 4) & 15];
+    result[written++] = dec2hex[ rawHash[i]       & 15];
+  }
+  result[written] = 0;
+  return const_cast<const char *>(result);
+}
+
+
+/// return latest hash as bytes
+void SHA256::getHash(unsigned char buffer[SHA256::HashBytes])
+{
   // save old hash if buffer is partially filled
   uint32_t oldHash[HashValues];
   for (int i = 0; i < HashValues; i++)
@@ -356,28 +374,17 @@ const char* SHA256::getHash()
   // process remaining bytes
   processBuffer();
 
-  // create hash string
+  unsigned char* current = buffer;
-  static char hashBuffer[HashValues*8+1];
-  size_t offset = 0;
   for (int i = 0; i < HashValues; i++)
   {
-    hashBuffer[offset++] = dec2hex[(m_hash[i] >> 28) & 15];
+    *current++ = (m_hash[i] >> 24) & 0xFF;
-    hashBuffer[offset++] = dec2hex[(m_hash[i] >> 24) & 15];
+    *current++ = (m_hash[i] >> 16) & 0xFF;
-    hashBuffer[offset++] = dec2hex[(m_hash[i] >> 20) & 15];
+    *current++ = (m_hash[i] >>  8) & 0xFF;
-    hashBuffer[offset++] = dec2hex[(m_hash[i] >> 16) & 15];
+    *current++ =  m_hash[i]        & 0xFF;
-    hashBuffer[offset++] = dec2hex[(m_hash[i] >> 12) & 15];
-    hashBuffer[offset++] = dec2hex[(m_hash[i] >>  8) & 15];
-    hashBuffer[offset++] = dec2hex[(m_hash[i] >>  4) & 15];
-    hashBuffer[offset++] = dec2hex[ m_hash[i]        & 15];
 
     // restore old hash
     m_hash[i] = oldHash[i];
   }
-  // zero-terminated string
-  hashBuffer[offset] = 0;
-
-  // convert to std::string
-  return (const char *)hashBuffer;
 }
 
 

third_party/hashing/hashers/sha256.h

@@ -1,6 +1,6 @@
 // //////////////////////////////////////////////////////////
 // sha256.h
-// Copyright (c) 2014 Stephan Brumme. All rights reserved.
+// Copyright (c) 2014,2015 Stephan Brumme. All rights reserved.
 // see http://create.stephan-brumme.com/disclaimer.html
 //
 
@@ -24,6 +24,9 @@
 class SHA256 //: public Hash
 {
 public:
+  /// split into 64 byte blocks (=> 512 bits), hash is 32 bytes long
+  enum { BlockSize = 512 / 8, HashBytes = 32 };
+
   /// same as reset()
   SHA256();
 
@@ -35,8 +38,10 @@ public:
   /// add arbitrary number of bytes
   void add(const void* data, size_t numBytes);
 
-  /// return latest hash as 16 hex characters
+  /// return latest hash as 64 hex characters
   const char* getHash();
+  /// return latest hash as bytes
+  void        getHash(unsigned char buffer[HashBytes]);
 
   /// restart
   void reset();
@@ -47,15 +52,14 @@ private:
   /// process everything left in the internal buffer
   void processBuffer();
 
-  /// split into 64 byte blocks (=> 512 bits)
-  enum { BlockSize = 512 / 8, HashValues = 8 };
-
   /// size of processed data in bytes
   uint64_t m_numBytes;
   /// valid bytes in m_buffer
   size_t   m_bufferSize;
   /// bytes not processed yet
   uint8_t  m_buffer[BlockSize];
+
+  enum { HashValues = HashBytes / 4 };
   /// hash, stored as integers
-  uint32_t m_hash[8];
+  uint32_t m_hash[HashValues];
 };

third_party/hashing/hashers/sha3.cpp

@@ -1,6 +1,6 @@
 // //////////////////////////////////////////////////////////
 // sha3.cpp
-// Copyright (c) 2014 Stephan Brumme. All rights reserved.
+// Copyright (c) 2014,2015 Stephan Brumme. All rights reserved.
 // see http://create.stephan-brumme.com/disclaimer.html
 //
 
@@ -24,7 +24,6 @@ void SHA3::changeBits(Bits bits)
 	reset();
 }
 
-
 /// restart
 void SHA3::reset()
 {
@@ -177,6 +176,7 @@ void SHA3::add(const void* data, size_t numBytes)
 {
   const uint8_t* current = (const uint8_t*) data;
 
+  // copy data to buffer
   if (m_bufferSize > 0)
   {
     while (numBytes > 0 && m_bufferSize < m_blockSize)
@@ -219,18 +219,16 @@ void SHA3::add(const void* data, size_t numBytes)
 /// process everything left in the internal buffer
 void SHA3::processBuffer()
 {
-  unsigned int blockSize = 200 - 2 * (m_bits / 8);
-
   // add padding
   size_t offset = m_bufferSize;
   // add a "1" byte
   m_buffer[offset++] = 0x06;
   // fill with zeros
-  while (offset < blockSize - 1)
+  while (offset < m_blockSize)
     m_buffer[offset++] = 0;
 
   // and add a single set bit
-  m_buffer[blockSize - 1] = 0x80;
+  m_buffer[offset - 1] |= 0x80;
 
   processBlock(m_buffer);
 }
@@ -255,11 +253,24 @@ const char* SHA3::getHash()
     {
       // convert a byte to hex
       unsigned char oneByte = (unsigned char) (m_hash[i] >> (8 * j));
-      result[written++]= dec2hex[oneByte >> 4];
+      result[written++] = dec2hex[oneByte >> 4];
-      result[written++]= dec2hex[oneByte & 15];
+      result[written++] = dec2hex[oneByte & 15];
+    }
+
+  // SHA3-224's last entry in m_hash provides only 32 bits instead of 64 bits
+  unsigned int remainder = m_bits - hashLength * 64;
+  unsigned int processed = 0;
+  while (processed < remainder)
+  {
+    // convert a byte to hex
+    unsigned char oneByte = (unsigned char) (m_hash[hashLength] >> processed);
+    result[written++] = dec2hex[oneByte >> 4];
+    result[written++] = dec2hex[oneByte & 15];
+
+    processed += 8;
   }
   result[written] = 0;
-  return (const char*)result;
+  return const_cast<const char *>(result);
 }
 
 

third_party/hashing/hashers/sha3.h

@@ -1,6 +1,6 @@
 // //////////////////////////////////////////////////////////
 // sha3.h
-// Copyright (c) 2014 Stephan Brumme. All rights reserved.
+// Copyright (c) 2014,2015 Stephan Brumme. All rights reserved.
 // see http://create.stephan-brumme.com/disclaimer.html
 //