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Sharded image read cache and parallel entropy: faster concurrent reads for IPED workers #3

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Sharded image read cache and parallel entropy: faster concurrent reads for IPED workers #3

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3641494
img: shard the image read cache into per-bank locks for concurrent re…
T0k1To Jul 8, 2026
a63b4eb
util: parallelize calculateEntropy block counting
T0k1To Jul 8, 2026
466fa4c
base: replace MD5_memcpy/MD5_memset loops with memcpy/memset
T0k1To Jul 8, 2026
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34 changes: 4 additions & 30 deletions tsk/base/md5c.c
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Original file line number Diff line number Diff line change
Expand Up @@ -55,8 +55,6 @@ documentation and/or software.
static void MD5Transform(UINT4[4], unsigned char[64]);
static void Encode(unsigned char *, UINT4 *, unsigned int);
static void Decode(UINT4 *, unsigned char *, unsigned int);
static void MD5_memcpy(POINTER, POINTER, unsigned int);
static void MD5_memset(POINTER, int, unsigned int);

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,
Expand Down Expand Up @@ -143,8 +141,7 @@ TSK_MD5_Update(TSK_MD5_CTX * context, unsigned char *input,
/* Transform as many times as possible.
*/
if (inputLen >= partLen) {
MD5_memcpy
((POINTER) & context->buffer[index], (POINTER) input, partLen);
memcpy(&context->buffer[index], input, partLen);
MD5Transform(context->state, context->buffer);

for (i = partLen; i + 63 < inputLen; i += 64)
Expand All @@ -156,8 +153,7 @@ TSK_MD5_Update(TSK_MD5_CTX * context, unsigned char *input,
i = 0;

/* Buffer remaining input */
MD5_memcpy
((POINTER) & context->buffer[index], (POINTER) & input[i],
memcpy(&context->buffer[index], &input[i],
inputLen - i);
}

Expand Down Expand Up @@ -190,7 +186,7 @@ TSK_MD5_Final(unsigned char digest[16], TSK_MD5_CTX * context)

/* Zeroize sensitive information.
*/
MD5_memset((POINTER) context, 0, sizeof(*context));
memset(context, 0, sizeof(*context));
}

/* MD5 basic transformation. Transforms state based on block.
Expand Down Expand Up @@ -281,7 +277,7 @@ MD5Transform(UINT4 state[4], unsigned char block[64])

/* Zeroize sensitive information.
*/
MD5_memset((POINTER) x, 0, sizeof(x));
memset(x, 0, sizeof(x));
}

/* Encodes input (UINT4) into output (unsigned char). Assumes len is
Expand Down Expand Up @@ -314,25 +310,3 @@ Decode(UINT4 *output, unsigned char *input, unsigned int len)
24);
}

/* Note: Replace "for loop" with standard memcpy if possible.
*/

static void
MD5_memcpy(POINTER output, POINTER input, unsigned int len)
{
unsigned int i;

for (i = 0; i < len; i++)
output[i] = input[i];
}

/* Note: Replace "for loop" with standard memset if possible.
*/
static void
MD5_memset(POINTER output, int value, unsigned int len)
{
unsigned int i;

for (i = 0; i < len; i++)
((char *) output)[i] = (char) value;
}
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