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Make overflow checks more readable

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Signed-off-by: David Horstmann <[email protected]>
This commit is contained in:
David Horstmann
2023-02-15 13:46:53 +00:00
parent 21b8387929
commit 34b3f1b757
1 changed files with 2 additions and 2 deletions
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library/oid.c
+2 -2
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@@ -844,7 +844,7 @@ int mbedtls_oid_get_numeric_string(char *buf, size_t size,
while (i < oid->len && ((oid->p[i] & 0x80) != 0)) {
/* Prevent overflow in value. */
if (((value << 7) >> 7) != value) {
if (value > (UINT_MAX >> 7)) {
return MBEDTLS_ERR_OID_BUF_TOO_SMALL;
}
@@ -873,7 +873,7 @@ int mbedtls_oid_get_numeric_string(char *buf, size_t size,
value = 0;
for (; i < oid->len; i++) {
/* Prevent overflow in value. */
if (((value << 7) >> 7) != value) {
if (value > (UINT_MAX >> 7)) {
return MBEDTLS_ERR_OID_BUF_TOO_SMALL;
}
if ((value == 0) && ((oid->p[i]) == 0x80)) {