Rename MD5 implementation (non-bisectable)

Just rename MD5 -> MD5_native in place so that git annotate will show
the lines as having originated there.

1 files changed, 0 insertions, 435 deletions

diff --git a/libqpdf/MD5.cc b/libqpdf/MD5.cc
deleted file mode 100644
index 6e166a7c..00000000
--- a/libqpdf/MD5.cc
+++ /dev/null
@@ -1,435 +0,0 @@
-// This file implements a class for computation of MD5 checksums.
-// It is derived from the reference algorithm for MD5 as given in
-// RFC 1321.  The original copyright notice is as follows:
-//
-/////////////////////////////////////////////////////////////////////////
-//
-// Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All
-// rights reserved.
-//
-// License to copy and use this software is granted provided that it
-// is identified as the "RSA Data Security, Inc. MD5 Message-Digest
-// Algorithm" in all material mentioning or referencing this software
-// or this function.
-//
-// License is also granted to make and use derivative works provided
-// that such works are identified as "derived from the RSA Data
-// Security, Inc. MD5 Message-Digest Algorithm" in all material
-// mentioning or referencing the derived work.
-//
-// RSA Data Security, Inc. makes no representations concerning either
-// the merchantability of this software or the suitability of this
-// software for any particular purpose. It is provided "as is"
-// without express or implied warranty of any kind.
-//
-// These notices must be retained in any copies of any part of this
-// documentation and/or software.
-//
-/////////////////////////////////////////////////////////////////////////
-
-#include <qpdf/MD5.hh>
-#include <qpdf/QUtil.hh>
-#include <qpdf/QIntC.hh>
-
-#include <stdio.h>
-#include <memory.h>
-#include <stdlib.h>
-#include <string.h>
-#include <errno.h>
-
-int const S11 = 7;
-int const S12 = 12;
-int const S13 = 17;
-int const S14 = 22;
-int const S21 = 5;
-int const S22 = 9;
-int const S23 = 14;
-int const S24 = 20;
-int const S31 = 4;
-int const S32 = 11;
-int const S33 = 16;
-int const S34 = 23;
-int const S41 = 6;
-int const S42 = 10;
-int const S43 = 15;
-int const S44 = 21;
-
-static unsigned char PADDING[64] = {
-  0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
-  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
-};
-
-// F, G, H and I are basic MD5 functions.
-#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
-#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
-#define H(x, y, z) ((x) ^ (y) ^ (z))
-#define I(x, y, z) ((y) ^ ((x) | (~z)))
-
-// ROTATE_LEFT rotates x left n bits.
-#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
-
-// FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
-// Rotation is separate from addition to prevent recomputation.
-#define FF(a, b, c, d, x, s, ac) { \
- (a) += F ((b), (c), (d)) + (x) + static_cast<UINT4>(ac); \
- (a) = ROTATE_LEFT ((a), (s)); \
- (a) += (b); \
-  }
-#define GG(a, b, c, d, x, s, ac) { \
- (a) += G ((b), (c), (d)) + (x) + static_cast<UINT4>(ac); \
- (a) = ROTATE_LEFT ((a), (s)); \
- (a) += (b); \
-  }
-#define HH(a, b, c, d, x, s, ac) { \
- (a) += H ((b), (c), (d)) + (x) + static_cast<UINT4>(ac); \
- (a) = ROTATE_LEFT ((a), (s)); \
- (a) += (b); \
-  }
-#define II(a, b, c, d, x, s, ac) { \
- (a) += I ((b), (c), (d)) + (x) + static_cast<UINT4>(ac); \
- (a) = ROTATE_LEFT ((a), (s)); \
- (a) += (b); \
-  }
-
-// MD5 initialization. Begins an MD5 operation, writing a new context.
-void MD5::init()
-{
-    count[0] = count[1] = 0;
-    // Load magic initialization constants.
-    state[0] = 0x67452301;
-    state[1] = 0xefcdab89;
-    state[2] = 0x98badcfe;
-    state[3] = 0x10325476;
-
-    finalized = false;
-    memset(digest_val, 0, sizeof(digest_val));
-}
-
-// MD5 block update operation. Continues an MD5 message-digest
-// operation, processing another message block, and updating the
-// context.
-
-void MD5::update(unsigned char *input,
-		 size_t inputLen)
-{
-    unsigned int i, index, partLen;
-
-    // Compute number of bytes mod 64
-    index = static_cast<unsigned int>((count[0] >> 3) & 0x3f);
-
-    // Update number of bits
-    if ((count[0] += (static_cast<UINT4>(inputLen) << 3)) <
-        (static_cast<UINT4>(inputLen) << 3))
-	count[1]++;
-    count[1] += (static_cast<UINT4>(inputLen) >> 29);
-
-    partLen = 64 - index;
-
-    // Transform as many times as possible.
-
-    if (inputLen >= partLen) {
-	memcpy(&buffer[index], input, partLen);
-	transform(state, buffer);
-
-	for (i = partLen; i + 63 < inputLen; i += 64)
-	    transform(state, &input[i]);
-
-	index = 0;
-    }
-    else
-	i = 0;
-
-    // Buffer remaining input
-    memcpy(&buffer[index], &input[i], inputLen-i);
-}
-
-// MD5 finalization. Ends an MD5 message-digest operation, writing the
-// the message digest and zeroizing the context.
-void MD5::final()
-{
-    if (finalized)
-    {
-	return;
-    }
-
-    unsigned char bits[8];
-    unsigned int index, padLen;
-
-    // Save number of bits
-    encode(bits, count, 8);
-
-    // Pad out to 56 mod 64.
-
-    index = static_cast<unsigned int>((count[0] >> 3) & 0x3f);
-    padLen = (index < 56) ? (56 - index) : (120 - index);
-    update(PADDING, padLen);
-
-    // Append length (before padding)
-    update(bits, 8);
-    // Store state in digest_val
-    encode(digest_val, state, 16);
-
-    // Zeroize sensitive information.
-    memset(state, 0, sizeof(state));
-    memset(count, 0, sizeof(count));
-    memset(buffer, 0, sizeof(buffer));
-
-    finalized = true;
-}
-
-// MD5 basic transformation. Transforms state based on block.
-void MD5::transform(UINT4 state[4], unsigned char block[64])
-{
-    UINT4 a = state[0], b = state[1], c = state[2], d = state[3], x[16];
-
-    decode(x, block, 64);
-
-    // Round 1
-    FF (a, b, c, d, x[ 0], S11, 0xd76aa478); // 1
-    FF (d, a, b, c, x[ 1], S12, 0xe8c7b756); // 2
-    FF (c, d, a, b, x[ 2], S13, 0x242070db); // 3
-    FF (b, c, d, a, x[ 3], S14, 0xc1bdceee); // 4
-    FF (a, b, c, d, x[ 4], S11, 0xf57c0faf); // 5
-    FF (d, a, b, c, x[ 5], S12, 0x4787c62a); // 6
-    FF (c, d, a, b, x[ 6], S13, 0xa8304613); // 7
-    FF (b, c, d, a, x[ 7], S14, 0xfd469501); // 8
-    FF (a, b, c, d, x[ 8], S11, 0x698098d8); // 9
-    FF (d, a, b, c, x[ 9], S12, 0x8b44f7af); // 10
-    FF (c, d, a, b, x[10], S13, 0xffff5bb1); // 11
-    FF (b, c, d, a, x[11], S14, 0x895cd7be); // 12
-    FF (a, b, c, d, x[12], S11, 0x6b901122); // 13
-    FF (d, a, b, c, x[13], S12, 0xfd987193); // 14
-    FF (c, d, a, b, x[14], S13, 0xa679438e); // 15
-    FF (b, c, d, a, x[15], S14, 0x49b40821); // 16
-
-    // Round 2
-    GG (a, b, c, d, x[ 1], S21, 0xf61e2562); // 17
-    GG (d, a, b, c, x[ 6], S22, 0xc040b340); // 18
-    GG (c, d, a, b, x[11], S23, 0x265e5a51); // 19
-    GG (b, c, d, a, x[ 0], S24, 0xe9b6c7aa); // 20
-    GG (a, b, c, d, x[ 5], S21, 0xd62f105d); // 21
-    GG (d, a, b, c, x[10], S22,  0x2441453); // 22
-    GG (c, d, a, b, x[15], S23, 0xd8a1e681); // 23
-    GG (b, c, d, a, x[ 4], S24, 0xe7d3fbc8); // 24
-    GG (a, b, c, d, x[ 9], S21, 0x21e1cde6); // 25
-    GG (d, a, b, c, x[14], S22, 0xc33707d6); // 26
-    GG (c, d, a, b, x[ 3], S23, 0xf4d50d87); // 27
-    GG (b, c, d, a, x[ 8], S24, 0x455a14ed); // 28
-    GG (a, b, c, d, x[13], S21, 0xa9e3e905); // 29
-    GG (d, a, b, c, x[ 2], S22, 0xfcefa3f8); // 30
-    GG (c, d, a, b, x[ 7], S23, 0x676f02d9); // 31
-    GG (b, c, d, a, x[12], S24, 0x8d2a4c8a); // 32
-
-    // Round 3
-    HH (a, b, c, d, x[ 5], S31, 0xfffa3942); // 33
-    HH (d, a, b, c, x[ 8], S32, 0x8771f681); // 34
-    HH (c, d, a, b, x[11], S33, 0x6d9d6122); // 35
-    HH (b, c, d, a, x[14], S34, 0xfde5380c); // 36
-    HH (a, b, c, d, x[ 1], S31, 0xa4beea44); // 37
-    HH (d, a, b, c, x[ 4], S32, 0x4bdecfa9); // 38
-    HH (c, d, a, b, x[ 7], S33, 0xf6bb4b60); // 39
-    HH (b, c, d, a, x[10], S34, 0xbebfbc70); // 40
-    HH (a, b, c, d, x[13], S31, 0x289b7ec6); // 41
-    HH (d, a, b, c, x[ 0], S32, 0xeaa127fa); // 42
-    HH (c, d, a, b, x[ 3], S33, 0xd4ef3085); // 43
-    HH (b, c, d, a, x[ 6], S34,  0x4881d05); // 44
-    HH (a, b, c, d, x[ 9], S31, 0xd9d4d039); // 45
-    HH (d, a, b, c, x[12], S32, 0xe6db99e5); // 46
-    HH (c, d, a, b, x[15], S33, 0x1fa27cf8); // 47
-    HH (b, c, d, a, x[ 2], S34, 0xc4ac5665); // 48
-
-    // Round 4
-    II (a, b, c, d, x[ 0], S41, 0xf4292244); // 49
-    II (d, a, b, c, x[ 7], S42, 0x432aff97); // 50
-    II (c, d, a, b, x[14], S43, 0xab9423a7); // 51
-    II (b, c, d, a, x[ 5], S44, 0xfc93a039); // 52
-    II (a, b, c, d, x[12], S41, 0x655b59c3); // 53
-    II (d, a, b, c, x[ 3], S42, 0x8f0ccc92); // 54
-    II (c, d, a, b, x[10], S43, 0xffeff47d); // 55
-    II (b, c, d, a, x[ 1], S44, 0x85845dd1); // 56
-    II (a, b, c, d, x[ 8], S41, 0x6fa87e4f); // 57
-    II (d, a, b, c, x[15], S42, 0xfe2ce6e0); // 58
-    II (c, d, a, b, x[ 6], S43, 0xa3014314); // 59
-    II (b, c, d, a, x[13], S44, 0x4e0811a1); // 60
-    II (a, b, c, d, x[ 4], S41, 0xf7537e82); // 61
-    II (d, a, b, c, x[11], S42, 0xbd3af235); // 62
-    II (c, d, a, b, x[ 2], S43, 0x2ad7d2bb); // 63
-    II (b, c, d, a, x[ 9], S44, 0xeb86d391); // 64
-
-    state[0] += a;
-    state[1] += b;
-    state[2] += c;
-    state[3] += d;
-
-    // Zeroize sensitive information.
-
-    memset (x, 0, sizeof (x));
-}
-
-// Encodes input (UINT4) into output (unsigned char). Assumes len is a
-// multiple of 4.
-void MD5::encode(unsigned char *output, UINT4 *input, size_t len)
-{
-    unsigned int i, j;
-
-    for (i = 0, j = 0; j < len; i++, j += 4) {
-	output[j] = static_cast<unsigned char>(input[i] & 0xff);
-	output[j+1] = static_cast<unsigned char>((input[i] >> 8) & 0xff);
-	output[j+2] = static_cast<unsigned char>((input[i] >> 16) & 0xff);
-	output[j+3] = static_cast<unsigned char>((input[i] >> 24) & 0xff);
-    }
-}
-
-// Decodes input (unsigned char) into output (UINT4). Assumes len is a
-// multiple of 4.
-void MD5::decode(UINT4 *output, unsigned char *input, size_t len)
-{
-    unsigned int i, j;
-
-    for (i = 0, j = 0; j < len; i++, j += 4)
-	output[i] =
-            static_cast<UINT4>(input[j]) |
-            (static_cast<UINT4>(input[j+1]) << 8) |
-	    (static_cast<UINT4>(input[j+2]) << 16) |
-            (static_cast<UINT4>(input[j+3]) << 24);
-}
-
-// Public functions
-
-MD5::MD5()
-{
-    init();
-}
-
-void MD5::reset()
-{
-    init();
-}
-
-void MD5::encodeString(char const* str)
-{
-    size_t len = strlen(str);
-
-    update(QUtil::unsigned_char_pointer(str), len);
-    final();
-}
-
-void MD5::appendString(char const* input_string)
-{
-    update(QUtil::unsigned_char_pointer(input_string), strlen(input_string));
-}
-
-void MD5::encodeDataIncrementally(char const* data, size_t len)
-{
-    update(QUtil::unsigned_char_pointer(data), len);
-}
-
-void MD5::encodeFile(char const *filename, qpdf_offset_t up_to_offset)
-{
-    unsigned char buffer[1024];
-
-    FILE *file = QUtil::safe_fopen(filename, "rb");
-    size_t len;
-    size_t so_far = 0;
-    size_t to_try = 1024;
-    size_t up_to_size = 0;
-    if (up_to_offset >= 0)
-    {
-        up_to_size = QIntC::to_size(up_to_offset);
-    }
-    do
-    {
-	if ((up_to_offset >= 0) && ((so_far + to_try) > up_to_size))
-	{
-	    to_try = up_to_size - so_far;
-	}
-	len = fread(buffer, 1, to_try, file);
-	if (len > 0)
-	{
-	    update(buffer, len);
-	    so_far += len;
-	    if ((up_to_offset >= 0) && (so_far >= up_to_size))
-	    {
-		break;
-	    }
-	}
-    } while (len > 0);
-    if (ferror(file))
-    {
-	// Assume, perhaps incorrectly, that errno was set by the
-	// underlying call to read....
-	(void) fclose(file);
-	QUtil::throw_system_error(
-	    std::string("MD5: read error on ") + filename);
-    }
-    (void) fclose(file);
-
-    final();
-}
-
-void MD5::digest(Digest result)
-{
-    final();
-    memcpy(result, digest_val, sizeof(digest_val));
-}
-
-void MD5::print()
-{
-    final();
-
-    unsigned int i;
-    for (i = 0; i < 16; ++i)
-    {
-	printf("%02x", digest_val[i]);
-    }
-    printf("\n");
-}
-
-std::string MD5::unparse()
-{
-    final();
-    return QUtil::hex_encode(
-        std::string(reinterpret_cast<char*>(digest_val), 16));
-}
-
-std::string
-MD5::getDataChecksum(char const* buf, size_t len)
-{
-    MD5 m;
-    m.encodeDataIncrementally(buf, len);
-    return m.unparse();
-}
-
-std::string
-MD5::getFileChecksum(char const* filename, qpdf_offset_t up_to_offset)
-{
-    MD5 m;
-    m.encodeFile(filename, up_to_offset);
-    return m.unparse();
-}
-
-bool
-MD5::checkDataChecksum(char const* const checksum,
-		       char const* buf, size_t len)
-{
-    std::string actual_checksum = getDataChecksum(buf, len);
-    return (checksum == actual_checksum);
-}
-
-bool
-MD5::checkFileChecksum(char const* const checksum,
-		       char const* filename, qpdf_offset_t up_to_offset)
-{
-    bool result = false;
-    try
-    {
-	std::string actual_checksum = getFileChecksum(filename, up_to_offset);
-	result = (checksum == actual_checksum);
-    }
-    catch (std::runtime_error const&)
-    {
-	// Ignore -- return false
-    }
-    return result;
-}