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Add leakage #1

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Add leakage #1

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33 changes: 28 additions & 5 deletions src/my_lib.c
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Original file line number Diff line number Diff line change
Expand Up @@ -17,17 +17,40 @@ void init(void)

void lookup_leakage(uint8_t *input, int inputLength, uint8_t *output)
{
// Empty and constant time
for(int i = 0; i < inputLength; ++i)
output[i] = lookup[input[i]];
}

static int NOINLINE branch_leakage_util(uint8_t data)
{
// Use primes and random calculation to keep the compiler from optimizing this function too much

if(data < 79)
return 7;

if(data < 119)
return data;

return 19 * data + 23;
}

int branch_leakage(uint8_t *input, int inputLength)
{
// Empty and constant time
return lookup[0] + inputLength;
int result = 0;

for(int i = 0; i < inputLength; ++i)
result += branch_leakage_util(input[i]);

return result;
}

int loop_leakage(uint8_t *input, int inputLength)
{
// Empty and constant time
return lookup[0] + inputLength;
for(int i = 0; i < input[0]; ++i)
{
if(lookup[i] < 5)
return 1;
}

return 2;
}
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