wolfSSL/wolfssl
1
0
Fork 1
mirror of https://github.com/wolfSSL/wolfssl.git synced 2025-07-30 10:47:28 +02:00
Code Issues Packages Projects Releases Wiki Activity

Fix in SP math for casting signed -1 to unsigned.

Browse Source
This commit is contained in:
David Garske
2020-09-08 14:16:11 -07:00
parent 7fd51cf9d9
commit b8bdeec940
2 changed files with 8 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
wolfcrypt/src/sp_int.c
View File

@ -950,7 +950,7 @@ static int sp_div(sp_int* a, sp_int* d, sp_int* r, sp_int* rem)
} }
for (i = sa->used - 1; i >= d->used; i--) { for (i = sa->used - 1; i >= d->used; i--) {
if (sa->dp[i] == dt) { if (sa->dp[i] == dt) {
t = (sp_digit)-1; t = SP_MASK; /* f's */
} }
else { else {
t = sp_div_word(sa->dp[i], sa->dp[i-1], dt); t = sp_div_word(sa->dp[i], sa->dp[i-1], dt);

12
wolfssl/wolfcrypt/sp_int.h
View File

@ -85,8 +85,6 @@ This library provides single precision (SP) integer math functions.
#endif #endif
typedef uint128_t sp_int_word; typedef uint128_t sp_int_word;
typedef int128_t sp_int_sword; typedef int128_t sp_int_sword;
#else
#error Word size not defined
#endif #endif
#else #else
#if SP_WORD_SIZE == 32 #if SP_WORD_SIZE == 32
@ -106,12 +104,16 @@ This library provides single precision (SP) integer math functions.
#endif #endif
typedef uint128_t sp_int_word; typedef uint128_t sp_int_word;
typedef int128_t sp_int_sword; typedef int128_t sp_int_sword;
#else
#error Word size not defined
#endif #endif
#endif #endif
#define SP_MASK (sp_digit)(-1) #if SP_WORD_SIZE == 32
#define SP_MASK ((sp_digit)0xffffffff)
#elif SP_WORD_SIZE == 64
#define SP_MASK ((sp_digit)0xffffffffffffffff)
#else
#error Word size not defined
#endif
#if defined(WOLFSSL_HAVE_SP_ECC) && defined(WOLFSSL_SP_NONBLOCK) #if defined(WOLFSSL_HAVE_SP_ECC) && defined(WOLFSSL_SP_NONBLOCK)