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Cleanup NXP LTC logic.

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This commit is contained in:
David Garske
2021-05-25 16:49:58 -07:00
parent c59349c7a7
commit 0d3530b45d
1 changed files with 23 additions and 23 deletions
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46
wolfcrypt/src/port/nxp/ksdk_port.c
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@ -124,17 +124,16 @@ int mp_mul(mp_int *A, mp_int *B, mp_int *C)
/* if unsigned mul can fit into LTC PKHA let's use it, otherwise call software mul */
if ((szA <= LTC_MAX_INT_BYTES / 2) && (szB <= LTC_MAX_INT_BYTES / 2)) {
int neg = 0;
#ifndef WOLFSSL_SP_MATH
neg = (A->sign == B->sign) ? MP_ZPOS : MP_NEG;
#endif
/* unsigned multiply */
uint8_t *ptrA = (uint8_t*)XMALLOC(LTC_MAX_INT_BYTES, NULL, DYNAMIC_TYPE_BIGINT);
uint8_t *ptrB = (uint8_t*)XMALLOC(LTC_MAX_INT_BYTES, NULL, DYNAMIC_TYPE_BIGINT);
uint8_t *ptrN = (uint8_t*)XMALLOC(LTC_MAX_INT_BYTES, NULL, DYNAMIC_TYPE_BIGINT);
uint8_t *ptrC = (uint8_t*)XMALLOC(LTC_MAX_INT_BYTES, NULL, DYNAMIC_TYPE_BIGINT);
/* unsigned multiply */
#ifndef WOLFSSL_SP_MATH
neg = (A->sign == B->sign) ? MP_ZPOS : MP_NEG;
#endif
if (ptrA && ptrB && ptrN && ptrC) {
uint16_t sizeA, sizeB, sizeN, sizeC = 0;
@ -328,34 +327,38 @@ int mp_mulmod(mp_int *a, mp_int *b, mp_int *c, mp_int *d)
int res = MP_OKAY;
status_t status;
int szA, szB, szC;
szA = mp_unsigned_bin_size(a);
szB = mp_unsigned_bin_size(b);
szC = mp_unsigned_bin_size(c);
if ((szA <= LTC_MAX_INT_BYTES) && (szB <= LTC_MAX_INT_BYTES) &&
(szC <= LTC_MAX_INT_BYTES))
{
mp_int t;
uint8_t *ptrA = (uint8_t*)XMALLOC(LTC_MAX_INT_BYTES, NULL, DYNAMIC_TYPE_BIGINT);
uint8_t *ptrB = (uint8_t*)XMALLOC(LTC_MAX_INT_BYTES, NULL, DYNAMIC_TYPE_BIGINT);
uint8_t *ptrC = (uint8_t*)XMALLOC(LTC_MAX_INT_BYTES, NULL, DYNAMIC_TYPE_BIGINT);
uint8_t *ptrD = (uint8_t*)XMALLOC(LTC_MAX_INT_BYTES, NULL, DYNAMIC_TYPE_BIGINT);
#ifndef WOLFSSL_SP_MATH
/* if A or B is negative, subtract abs(A) or abs(B) from modulus to get
* positive integer representation of the same number */
mp_int t;
res = mp_init(&t);
#ifndef WOLFSSL_SP_MATH
if (a->sign) {
if (res == MP_OKAY)
res = mp_add(a, c, &t);
if (res == MP_OKAY)
res = mp_copy(&t, a);
}
if (b->sign) {
if (res == MP_OKAY)
res = mp_add(b, c, &t);
if (res == MP_OKAY)
res = mp_copy(&t, b);
if (res == MP_OKAY) {
if (a->sign) {
if (res == MP_OKAY)
res = mp_add(a, c, &t);
if (res == MP_OKAY)
res = mp_copy(&t, a);
}
if (b->sign) {
if (res == MP_OKAY)
res = mp_add(b, c, &t);
if (res == MP_OKAY)
res = mp_copy(&t, b);
}
mp_clear(&t);
}
#endif
@ -416,9 +419,6 @@ int mp_mulmod(mp_int *a, mp_int *b, mp_int *c, mp_int *d)
if (ptrD) {
XFREE(ptrD, NULL, DYNAMIC_TYPE_BIGINT);
}
#ifndef USE_FAST_MATH
mp_clear(&t);
#endif
}
else {
#if defined(FREESCALE_LTC_TFM_RSA_4096_ENABLE)