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Merge pull request #3703 from SparkiDev/sp_int_malloc

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SP int: Rework allocation of temporaries
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toddouska 2021-02-11 13:49:45 -08:00 committed by GitHub
commit d40ea03621
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3 changed files with 1893 additions and 2435 deletions
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4
configure.ac
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@ -5134,6 +5134,10 @@ do
AM_CFLAGS="$AM_CFLAGS -DSP_INT_BITS=$v"
ENABLED_SP_MATH_ALL="yes"
;;
nomalloc)
AM_CFLAGS="$AM_CFLAGS -DWOLFSSL_SP_NO_MALLOC"
ENABLED_SP_MATH_ALL="yes"
;;
*)
AC_MSG_ERROR([Support SP int bit sizes: 256, 384, 521, 1024, 2048, 3072, 4096. $ENABLED_SP_MATH_ALL not supported])
;;

4303
wolfcrypt/src/sp_int.c
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21
wolfssl/wolfcrypt/sp_int.h
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@ -629,23 +629,12 @@ typedef struct sp_ecc_ctx {
#define CheckFastMathSettings() (SP_WORD_SIZE == CheckRunTimeFastMath())
#ifdef WOLFSSL_SP_INT_NEGATIVE
#ifdef HAVE_WOLF_BIGINT
#define SP_INT_EXTRA_OVERHEAD sizeof(int) + sizeof(struct WC_BIGINT)
#else
#define SP_INT_EXTRA_OVERHEAD sizeof(int)
#endif
#elif defined(HAVE_WOLF_BIGINT)
#define SP_INT_EXTRA_OVERHEAD sizeof(struct WC_BIGINT)
#else
#define SP_INT_EXTRA_OVERHEAD 0
#endif
#define WOLFSSL_SP_INT_OVERHEAD \
(sizeof(int) + sizeof(int) + SP_INT_EXTRA_OVERHEAD)
/* The number of bytes to a sp_int with 'cnt' digits. */
#define MP_INT_SIZEOF(cnt) \
(WOLFSSL_SP_INT_OVERHEAD + ((cnt) * SP_WORD_SIZEOF))
(sizeof(sp_int) - (SP_INT_DIGITS - (cnt)) * sizeof(sp_int_digit))
/* The address of the next sp_int after one with 'cnt' digits. */
#define MP_INT_NEXT(t, cnt) \
(sp_int*)(((byte*)(t)) + MP_INT_SIZEOF(cnt))
/**
* A reuslt of NO.