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wolfmath: check mpSz cleanup.

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jordan
2026-05-11 12:09:50 -05:00
parent 98831c25d4
commit 99e5597372
2 changed files with 4 additions and 4 deletions
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tests/api/test_wolfmath.c
+1 -1
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@@ -199,7 +199,7 @@ int test_wc_export_int(void)
len = sizeof(buf);
ExpectIntEQ(mp_init(&mp), MP_OKAY);
ExpectIntEQ(mp_set_bit(&mp, 257), 0);
ExpectIntEQ(wc_export_int(&mp, buf, &len, 0, WC_TYPE_UNSIGNED_BIN),
ExpectIntEQ(wc_export_int(&mp, buf, &len, keySz, WC_TYPE_UNSIGNED_BIN),
WC_NO_ERR_TRACE(BUFFER_E));
mp_clear(&mp);
wolfcrypt/src/wolfmath.c
+3 -3
View File
@@ -253,14 +253,14 @@ int wc_export_int(mp_int* mp, byte* buf, word32* len, word32 keySz,
else {
/* for WC_TYPE_UNSIGNED_BIN keySz is used to zero pad.
* The key size is always returned as the size */
word32 mpSz = 0;
int mpSz = 0;
if (*len < keySz) {
*len = keySz;
return BUFFER_E;
}
*len = keySz;
mpSz = (word32)mp_unsigned_bin_size(mp);
if (mpSz > keySz) {
mpSz = mp_unsigned_bin_size(mp);
if (mpSz < 0 || (word32)mpSz > keySz) {
return BUFFER_E;
}
XMEMSET(buf, 0, *len);