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-rw-r--r--audio/softsynth/mt32/ROMInfo.cpp22
-rw-r--r--audio/softsynth/mt32/sha1/sha1.cpp591
-rw-r--r--audio/softsynth/mt32/sha1/sha1.h93
3 files changed, 702 insertions, 4 deletions
diff --git a/audio/softsynth/mt32/ROMInfo.cpp b/audio/softsynth/mt32/ROMInfo.cpp
index 7c0127078b..8851817eeb 100644
--- a/audio/softsynth/mt32/ROMInfo.cpp
+++ b/audio/softsynth/mt32/ROMInfo.cpp
@@ -17,6 +17,7 @@
//#include <cstring>
#include "ROMInfo.h"
+#include "sha1/sha1.h"
namespace MT32Emu {
@@ -52,14 +53,27 @@ static const ROMInfo *getKnownROMInfoFromList(unsigned int index) {
return ROM_INFOS[index];
}
+static void getSHA1(Common::File *file, char *fileDigest) {
+ size_t fileSize = file->size();
+ byte *data = new byte[fileSize];
+ file->read(data, fileSize);
+ file->seek(0);
+ SHA1 sha1;
+ uint intDigest[5];
+ sha1.Input((const char *)data, fileSize);
+ if (sha1.Result(intDigest))
+ sprintf(fileDigest, "%08x%08x%08x%08x%08x", intDigest[0], intDigest[1], intDigest[2], intDigest[3], intDigest[4]);
+ delete[] data;
+}
+
const ROMInfo* ROMInfo::getROMInfo(Common::File *file) {
size_t fileSize = file->size();
- // We haven't added the SHA1 checksum code in ScummVM, as the file size
- // suffices for our needs for now.
- //const char *fileDigest = file->getSHA1();
+ char fileDigest[41]; // Includes terminator char
+ getSHA1(file, fileDigest);
+
for (int i = 0; getKnownROMInfoFromList(i) != NULL; i++) {
const ROMInfo *romInfo = getKnownROMInfoFromList(i);
- if (fileSize == romInfo->fileSize /*&& !strcmp(fileDigest, romInfo->sha1Digest)*/) {
+ if (fileSize == romInfo->fileSize && !strcmp(fileDigest, romInfo->sha1Digest)) {
return romInfo;
}
}
diff --git a/audio/softsynth/mt32/sha1/sha1.cpp b/audio/softsynth/mt32/sha1/sha1.cpp
new file mode 100644
index 0000000000..5f8fd3e032
--- /dev/null
+++ b/audio/softsynth/mt32/sha1/sha1.cpp
@@ -0,0 +1,591 @@
+/*
+ * sha1.cpp
+ *
+ * Copyright (C) 1998, 2009
+ * Paul E. Jones <paulej@packetizer.com>
+ * All Rights Reserved.
+ *
+ *****************************************************************************
+ * $Id: sha1.cpp 12 2009-06-22 19:34:25Z paulej $
+ *****************************************************************************
+ *
+ * Description:
+ * This class implements the Secure Hashing Standard as defined
+ * in FIPS PUB 180-1 published April 17, 1995.
+ *
+ * The Secure Hashing Standard, which uses the Secure Hashing
+ * Algorithm (SHA), produces a 160-bit message digest for a
+ * given data stream. In theory, it is highly improbable that
+ * two messages will produce the same message digest. Therefore,
+ * this algorithm can serve as a means of providing a "fingerprint"
+ * for a message.
+ *
+ * Portability Issues:
+ * SHA-1 is defined in terms of 32-bit "words". This code was
+ * written with the expectation that the processor has at least
+ * a 32-bit machine word size. If the machine word size is larger,
+ * the code should still function properly. One caveat to that
+ * is that the input functions taking characters and character arrays
+ * assume that only 8 bits of information are stored in each character.
+ *
+ * Caveats:
+ * SHA-1 is designed to work with messages less than 2^64 bits long.
+ * Although SHA-1 allows a message digest to be generated for
+ * messages of any number of bits less than 2^64, this implementation
+ * only works with messages with a length that is a multiple of 8
+ * bits.
+ *
+ */
+
+
+#include "sha1.h"
+
+using namespace MT32Emu;
+
+/*
+ * SHA1
+ *
+ * Description:
+ * This is the constructor for the sha1 class.
+ *
+ * Parameters:
+ * None.
+ *
+ * Returns:
+ * Nothing.
+ *
+ * Comments:
+ *
+ */
+SHA1::SHA1()
+{
+ Reset();
+}
+
+/*
+ * ~SHA1
+ *
+ * Description:
+ * This is the destructor for the sha1 class
+ *
+ * Parameters:
+ * None.
+ *
+ * Returns:
+ * Nothing.
+ *
+ * Comments:
+ *
+ */
+SHA1::~SHA1()
+{
+ // The destructor does nothing
+}
+
+/*
+ * Reset
+ *
+ * Description:
+ * This function will initialize the sha1 class member variables
+ * in preparation for computing a new message digest.
+ *
+ * Parameters:
+ * None.
+ *
+ * Returns:
+ * Nothing.
+ *
+ * Comments:
+ *
+ */
+void SHA1::Reset()
+{
+ Length_Low = 0;
+ Length_High = 0;
+ Message_Block_Index = 0;
+
+ H[0] = 0x67452301;
+ H[1] = 0xEFCDAB89;
+ H[2] = 0x98BADCFE;
+ H[3] = 0x10325476;
+ H[4] = 0xC3D2E1F0;
+
+ Computed = false;
+ Corrupted = false;
+}
+
+/*
+ * Result
+ *
+ * Description:
+ * This function will return the 160-bit message digest into the
+ * array provided.
+ *
+ * Parameters:
+ * message_digest_array: [out]
+ * This is an array of five unsigned integers which will be filled
+ * with the message digest that has been computed.
+ *
+ * Returns:
+ * True if successful, false if it failed.
+ *
+ * Comments:
+ *
+ */
+bool SHA1::Result(unsigned *message_digest_array)
+{
+ int i; // Counter
+
+ if (Corrupted)
+ {
+ return false;
+ }
+
+ if (!Computed)
+ {
+ PadMessage();
+ Computed = true;
+ }
+
+ for(i = 0; i < 5; i++)
+ {
+ message_digest_array[i] = H[i];
+ }
+
+ return true;
+}
+
+/*
+ * Input
+ *
+ * Description:
+ * This function accepts an array of octets as the next portion of
+ * the message.
+ *
+ * Parameters:
+ * message_array: [in]
+ * An array of characters representing the next portion of the
+ * message.
+ *
+ * Returns:
+ * Nothing.
+ *
+ * Comments:
+ *
+ */
+void SHA1::Input( const unsigned char *message_array,
+ unsigned length)
+{
+ if (!length)
+ {
+ return;
+ }
+
+ if (Computed || Corrupted)
+ {
+ Corrupted = true;
+ return;
+ }
+
+ while(length-- && !Corrupted)
+ {
+ Message_Block[Message_Block_Index++] = (*message_array & 0xFF);
+
+ Length_Low += 8;
+ Length_Low &= 0xFFFFFFFF; // Force it to 32 bits
+ if (Length_Low == 0)
+ {
+ Length_High++;
+ Length_High &= 0xFFFFFFFF; // Force it to 32 bits
+ if (Length_High == 0)
+ {
+ Corrupted = true; // Message is too long
+ }
+ }
+
+ if (Message_Block_Index == 64)
+ {
+ ProcessMessageBlock();
+ }
+
+ message_array++;
+ }
+}
+
+/*
+ * Input
+ *
+ * Description:
+ * This function accepts an array of octets as the next portion of
+ * the message.
+ *
+ * Parameters:
+ * message_array: [in]
+ * An array of characters representing the next portion of the
+ * message.
+ * length: [in]
+ * The length of the message_array
+ *
+ * Returns:
+ * Nothing.
+ *
+ * Comments:
+ *
+ */
+void SHA1::Input( const char *message_array,
+ unsigned length)
+{
+ Input((unsigned char *) message_array, length);
+}
+
+/*
+ * Input
+ *
+ * Description:
+ * This function accepts a single octets as the next message element.
+ *
+ * Parameters:
+ * message_element: [in]
+ * The next octet in the message.
+ *
+ * Returns:
+ * Nothing.
+ *
+ * Comments:
+ *
+ */
+void SHA1::Input(unsigned char message_element)
+{
+ Input(&message_element, 1);
+}
+
+/*
+ * Input
+ *
+ * Description:
+ * This function accepts a single octet as the next message element.
+ *
+ * Parameters:
+ * message_element: [in]
+ * The next octet in the message.
+ *
+ * Returns:
+ * Nothing.
+ *
+ * Comments:
+ *
+ */
+void SHA1::Input(char message_element)
+{
+ Input((unsigned char *) &message_element, 1);
+}
+
+/*
+ * operator<<
+ *
+ * Description:
+ * This operator makes it convenient to provide character strings to
+ * the SHA1 object for processing.
+ *
+ * Parameters:
+ * message_array: [in]
+ * The character array to take as input.
+ *
+ * Returns:
+ * A reference to the SHA1 object.
+ *
+ * Comments:
+ * Each character is assumed to hold 8 bits of information.
+ *
+ */
+SHA1& SHA1::operator<<(const char *message_array)
+{
+ const char *p = message_array;
+
+ while(*p)
+ {
+ Input(*p);
+ p++;
+ }
+
+ return *this;
+}
+
+/*
+ * operator<<
+ *
+ * Description:
+ * This operator makes it convenient to provide character strings to
+ * the SHA1 object for processing.
+ *
+ * Parameters:
+ * message_array: [in]
+ * The character array to take as input.
+ *
+ * Returns:
+ * A reference to the SHA1 object.
+ *
+ * Comments:
+ * Each character is assumed to hold 8 bits of information.
+ *
+ */
+SHA1& SHA1::operator<<(const unsigned char *message_array)
+{
+ const unsigned char *p = message_array;
+
+ while(*p)
+ {
+ Input(*p);
+ p++;
+ }
+
+ return *this;
+}
+
+/*
+ * operator<<
+ *
+ * Description:
+ * This function provides the next octet in the message.
+ *
+ * Parameters:
+ * message_element: [in]
+ * The next octet in the message
+ *
+ * Returns:
+ * A reference to the SHA1 object.
+ *
+ * Comments:
+ * The character is assumed to hold 8 bits of information.
+ *
+ */
+SHA1& SHA1::operator<<(const char message_element)
+{
+ Input((unsigned char *) &message_element, 1);
+
+ return *this;
+}
+
+/*
+ * operator<<
+ *
+ * Description:
+ * This function provides the next octet in the message.
+ *
+ * Parameters:
+ * message_element: [in]
+ * The next octet in the message
+ *
+ * Returns:
+ * A reference to the SHA1 object.
+ *
+ * Comments:
+ * The character is assumed to hold 8 bits of information.
+ *
+ */
+SHA1& SHA1::operator<<(const unsigned char message_element)
+{
+ Input(&message_element, 1);
+
+ return *this;
+}
+
+/*
+ * ProcessMessageBlock
+ *
+ * Description:
+ * This function will process the next 512 bits of the message
+ * stored in the Message_Block array.
+ *
+ * Parameters:
+ * None.
+ *
+ * Returns:
+ * Nothing.
+ *
+ * Comments:
+ * Many of the variable names in this function, especially the single
+ * character names, were used because those were the names used
+ * in the publication.
+ *
+ */
+void SHA1::ProcessMessageBlock()
+{
+ const unsigned K[] = { // Constants defined for SHA-1
+ 0x5A827999,
+ 0x6ED9EBA1,
+ 0x8F1BBCDC,
+ 0xCA62C1D6
+ };
+ int t; // Loop counter
+ unsigned temp; // Temporary word value
+ unsigned W[80]; // Word sequence
+ unsigned A, B, C, D, E; // Word buffers
+
+ /*
+ * Initialize the first 16 words in the array W
+ */
+ for(t = 0; t < 16; t++)
+ {
+ W[t] = ((unsigned) Message_Block[t * 4]) << 24;
+ W[t] |= ((unsigned) Message_Block[t * 4 + 1]) << 16;
+ W[t] |= ((unsigned) Message_Block[t * 4 + 2]) << 8;
+ W[t] |= ((unsigned) Message_Block[t * 4 + 3]);
+ }
+
+ for(t = 16; t < 80; t++)
+ {
+ W[t] = CircularShift(1,W[t-3] ^ W[t-8] ^ W[t-14] ^ W[t-16]);
+ }
+
+ A = H[0];
+ B = H[1];
+ C = H[2];
+ D = H[3];
+ E = H[4];
+
+ for(t = 0; t < 20; t++)
+ {
+ temp = CircularShift(5,A) + ((B & C) | ((~B) & D)) + E + W[t] + K[0];
+ temp &= 0xFFFFFFFF;
+ E = D;
+ D = C;
+ C = CircularShift(30,B);
+ B = A;
+ A = temp;
+ }
+
+ for(t = 20; t < 40; t++)
+ {
+ temp = CircularShift(5,A) + (B ^ C ^ D) + E + W[t] + K[1];
+ temp &= 0xFFFFFFFF;
+ E = D;
+ D = C;
+ C = CircularShift(30,B);
+ B = A;
+ A = temp;
+ }
+
+ for(t = 40; t < 60; t++)
+ {
+ temp = CircularShift(5,A) +
+ ((B & C) | (B & D) | (C & D)) + E + W[t] + K[2];
+ temp &= 0xFFFFFFFF;
+ E = D;
+ D = C;
+ C = CircularShift(30,B);
+ B = A;
+ A = temp;
+ }
+
+ for(t = 60; t < 80; t++)
+ {
+ temp = CircularShift(5,A) + (B ^ C ^ D) + E + W[t] + K[3];
+ temp &= 0xFFFFFFFF;
+ E = D;
+ D = C;
+ C = CircularShift(30,B);
+ B = A;
+ A = temp;
+ }
+
+ H[0] = (H[0] + A) & 0xFFFFFFFF;
+ H[1] = (H[1] + B) & 0xFFFFFFFF;
+ H[2] = (H[2] + C) & 0xFFFFFFFF;
+ H[3] = (H[3] + D) & 0xFFFFFFFF;
+ H[4] = (H[4] + E) & 0xFFFFFFFF;
+
+ Message_Block_Index = 0;
+}
+
+/*
+ * PadMessage
+ *
+ * Description:
+ * According to the standard, the message must be padded to an even
+ * 512 bits. The first padding bit must be a '1'. The last 64 bits
+ * represent the length of the original message. All bits in between
+ * should be 0. This function will pad the message according to those
+ * rules by filling the message_block array accordingly. It will also
+ * call ProcessMessageBlock() appropriately. When it returns, it
+ * can be assumed that the message digest has been computed.
+ *
+ * Parameters:
+ * None.
+ *
+ * Returns:
+ * Nothing.
+ *
+ * Comments:
+ *
+ */
+void SHA1::PadMessage()
+{
+ /*
+ * Check to see if the current message block is too small to hold
+ * the initial padding bits and length. If so, we will pad the
+ * block, process it, and then continue padding into a second block.
+ */
+ if (Message_Block_Index > 55)
+ {
+ Message_Block[Message_Block_Index++] = 0x80;
+ while(Message_Block_Index < 64)
+ {
+ Message_Block[Message_Block_Index++] = 0;
+ }
+
+ ProcessMessageBlock();
+
+ while(Message_Block_Index < 56)
+ {
+ Message_Block[Message_Block_Index++] = 0;
+ }
+ }
+ else
+ {
+ Message_Block[Message_Block_Index++] = 0x80;
+ while(Message_Block_Index < 56)
+ {
+ Message_Block[Message_Block_Index++] = 0;
+ }
+
+ }
+
+ /*
+ * Store the message length as the last 8 octets
+ */
+ Message_Block[56] = (Length_High >> 24) & 0xFF;
+ Message_Block[57] = (Length_High >> 16) & 0xFF;
+ Message_Block[58] = (Length_High >> 8) & 0xFF;
+ Message_Block[59] = (Length_High) & 0xFF;
+ Message_Block[60] = (Length_Low >> 24) & 0xFF;
+ Message_Block[61] = (Length_Low >> 16) & 0xFF;
+ Message_Block[62] = (Length_Low >> 8) & 0xFF;
+ Message_Block[63] = (Length_Low) & 0xFF;
+
+ ProcessMessageBlock();
+}
+
+
+/*
+ * CircularShift
+ *
+ * Description:
+ * This member function will perform a circular shifting operation.
+ *
+ * Parameters:
+ * bits: [in]
+ * The number of bits to shift (1-31)
+ * word: [in]
+ * The value to shift (assumes a 32-bit integer)
+ *
+ * Returns:
+ * The shifted value.
+ *
+ * Comments:
+ *
+ */
+unsigned SHA1::CircularShift(int bits, unsigned word)
+{
+ return ((word << bits) & 0xFFFFFFFF) | ((word & 0xFFFFFFFF) >> (32-bits));
+}
diff --git a/audio/softsynth/mt32/sha1/sha1.h b/audio/softsynth/mt32/sha1/sha1.h
new file mode 100644
index 0000000000..bb1c7ed182
--- /dev/null
+++ b/audio/softsynth/mt32/sha1/sha1.h
@@ -0,0 +1,93 @@
+/*
+ * sha1.h
+ *
+ * Copyright (C) 1998, 2009
+ * Paul E. Jones <paulej@packetizer.com>
+ * All Rights Reserved.
+ *
+ *****************************************************************************
+ * $Id: sha1.h 12 2009-06-22 19:34:25Z paulej $
+ *****************************************************************************
+ *
+ * Description:
+ * This class implements the Secure Hashing Standard as defined
+ * in FIPS PUB 180-1 published April 17, 1995.
+ *
+ * Many of the variable names in this class, especially the single
+ * character names, were used because those were the names used
+ * in the publication.
+ *
+ * Please read the file sha1.cpp for more information.
+ *
+ */
+
+#ifndef _SHA1_H_
+#define _SHA1_H_
+
+namespace MT32Emu {
+
+class SHA1
+{
+
+ public:
+
+ SHA1();
+ virtual ~SHA1();
+
+ /*
+ * Re-initialize the class
+ */
+ void Reset();
+
+ /*
+ * Returns the message digest
+ */
+ bool Result(unsigned *message_digest_array);
+
+ /*
+ * Provide input to SHA1
+ */
+ void Input( const unsigned char *message_array,
+ unsigned length);
+ void Input( const char *message_array,
+ unsigned length);
+ void Input(unsigned char message_element);
+ void Input(char message_element);
+ SHA1& operator<<(const char *message_array);
+ SHA1& operator<<(const unsigned char *message_array);
+ SHA1& operator<<(const char message_element);
+ SHA1& operator<<(const unsigned char message_element);
+
+ private:
+
+ /*
+ * Process the next 512 bits of the message
+ */
+ void ProcessMessageBlock();
+
+ /*
+ * Pads the current message block to 512 bits
+ */
+ void PadMessage();
+
+ /*
+ * Performs a circular left shift operation
+ */
+ inline unsigned CircularShift(int bits, unsigned word);
+
+ unsigned H[5]; // Message digest buffers
+
+ unsigned Length_Low; // Message length in bits
+ unsigned Length_High; // Message length in bits
+
+ unsigned char Message_Block[64]; // 512-bit message blocks
+ int Message_Block_Index; // Index into message block array
+
+ bool Computed; // Is the digest computed?
+ bool Corrupted; // Is the message digest corruped?
+
+};
+
+} // namespace MT32Emu
+
+#endif // #ifndef _SHA1_H_
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