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SP dyanmic stack: WOLFSSL_SP_NO_DYN_STACK disable use

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For small code and not small stack, arrays are being defined with a size
dependent on the input parameters, where compiler supports it.
Disable this with: WOLFSSL_SP_NO_DYN_STACK
This commit is contained in:
Sean Parkinson
2021-03-19 09:56:56 +10:00
parent 14e79a165a
commit f6840ca907
1 changed files with 13 additions and 8 deletions
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21
wolfcrypt/src/sp_int.c
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@ -80,6 +80,8 @@ This library provides single precision (SP) integer math functions.
* WOLFSSL_SP_INT_NEGATIVE Enables negative values to be used.
* WOLFSSL_SP_INT_DIGIT_ALIGN Enable when unaligned access of sp_int_digit
* pointer is not allowed.
* WOLFSSL_SP_NO_DYN_STACK Disable use of dynamic stack items.
* Used with small code size and not small stack.
*/
#if defined(WOLFSSL_SP_MATH) || defined(WOLFSSL_SP_MATH_ALL)
@ -94,7 +96,7 @@ This library provides single precision (SP) integer math functions.
sp_int* n = NULL
#else
#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && \
defined(WOLFSSL_SP_SMALL)
defined(WOLFSSL_SP_SMALL) && !defined(WOLFSSL_SP_NO_DYN_STACK)
/* Declare a variable on the stack with the required data size. */
#define DECL_SP_INT(n, s) \
byte n##d[MP_INT_SIZEOF(s)]; \
@ -164,7 +166,7 @@ This library provides single precision (SP) integer math functions.
sp_int* n[c] = { NULL, }
#else
#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && \
defined(WOLFSSL_SP_SMALL)
defined(WOLFSSL_SP_SMALL) && !defined(WOLFSSL_SP_NO_DYN_STACK)
/* Declare a variable on the stack with the required data size. */
#define DECL_SP_INT_ARRAY(n, s, c) \
byte n##d[MP_INT_SIZEOF(s) * (c)]; \
@ -205,7 +207,7 @@ This library provides single precision (SP) integer math functions.
while (0)
#else
#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && \
defined(WOLFSSL_SP_SMALL)
defined(WOLFSSL_SP_SMALL) && !defined(WOLFSSL_SP_NO_DYN_STACK)
/* Data declared on stack that supports multiple sp_ints of the
* required size. Use pointers into data to make up array and set sizes.
*/
@ -4768,7 +4770,8 @@ int sp_mod(sp_int* a, sp_int* m, sp_int* r)
int k;
#if defined(WOLFSSL_SMALL_STACK) && !defined(WOLFSSL_SP_NO_MALLOC)
sp_int_digit* t = NULL;
#elif defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && defined(WOLFSSL_SP_SMALL)
#elif defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && \
defined(WOLFSSL_SP_SMALL) && !defined(WOLFSSL_SP_NO_DYN_STACK)
sp_int_digit t[a->used * 2];
#else
sp_int_digit t[SP_INT_DIGITS];
@ -4844,7 +4847,8 @@ int sp_mod(sp_int* a, sp_int* m, sp_int* r)
int k;
#if defined(WOLFSSL_SMALL_STACK) && !defined(WOLFSSL_SP_NO_MALLOC)
sp_int_digit* t = NULL;
#elif defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && defined(WOLFSSL_SP_SMALL)
#elif defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && \
defined(WOLFSSL_SP_SMALL) && !defined(WOLFSSL_SP_NO_DYN_STACK)
sp_int_digit t[a->used + b->used];
#else
sp_int_digit t[SP_INT_DIGITS];
@ -4921,7 +4925,8 @@ int sp_mod(sp_int* a, sp_int* m, sp_int* r)
int k;
#if defined(WOLFSSL_SMALL_STACK) && !defined(WOLFSSL_SP_NO_MALLOC)
sp_int_digit* t = NULL;
#elif defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && defined(WOLFSSL_SP_SMALL)
#elif defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && \
defined(WOLFSSL_SP_SMALL) && !defined(WOLFSSL_SP_NO_DYN_STACK)
sp_int_digit t[a->used + b->used];
#else
sp_int_digit t[SP_INT_DIGITS];
@ -9300,7 +9305,7 @@ int sp_mul_2d(sp_int* a, int e, sp_int* r)
#if defined(WOLFSSL_SMALL_STACK) && !defined(WOLFSSL_SP_NO_MALLOC)
sp_int_digit* t = NULL;
#elif defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && \
defined(WOLFSSL_SP_SMALL)
defined(WOLFSSL_SP_SMALL) && !defined(WOLFSSL_SP_NO_DYN_STACK)
sp_int_digit t[a->used * 2];
#else
sp_int_digit t[SP_INT_DIGITS];
@ -9409,7 +9414,7 @@ int sp_mul_2d(sp_int* a, int e, sp_int* r)
#if defined(WOLFSSL_SMALL_STACK) && !defined(WOLFSSL_SP_NO_MALLOC)
sp_int_digit* t = NULL;
#elif defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && \
defined(WOLFSSL_SP_SMALL)
defined(WOLFSSL_SP_SMALL) && !defined(WOLFSSL_SP_NO_DYN_STACK)
sp_int_digit t[a->used * 2];
#else
sp_int_digit t[SP_INT_DIGITS];