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fp_set_bit: return error when bit offset is too large 

If the bit to set is beyond the predefined maximum size then return an
error.
Same for fp_is_bit_set().
pull/3135/head
Sean Parkinson 2020-07-16 09:39:42 +10:00
parent fbe0c8cba7
commit eb7a01342f
1 changed files with 6 additions and 6 deletions
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12
wolfcrypt/src/tfm.c
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@ -3311,9 +3311,9 @@ int fp_is_bit_set (fp_int *a, fp_digit b)
fp_digit i; fp_digit i;
if (b > FP_MAX_BITS) if (b > FP_MAX_BITS)
return 0; return FP_VAL;
else
i = b/DIGIT_BIT; i = b/DIGIT_BIT;
if ((fp_digit)a->used < i) if ((fp_digit)a->used < i)
return 0; return 0;
@ -3327,9 +3327,9 @@ int fp_set_bit (fp_int * a, fp_digit b)
fp_digit i; fp_digit i;
if (b > FP_MAX_BITS) if (b > FP_MAX_BITS)
return 0; return FP_VAL;
else
i = b/DIGIT_BIT; i = b/DIGIT_BIT;
/* set the used count of where the bit will go if required */ /* set the used count of where the bit will go if required */
if (a->used < (int)(i+1)) if (a->used < (int)(i+1))