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Fix of buffer overflow in GenerateDNSEntryRIDString()

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This commit is contained in:
Lealem Amedie
2023-07-25 14:33:05 -06:00
parent d3202600a4
commit 9cade8c9a4
1 changed files with 14 additions and 13 deletions
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27
wolfcrypt/src/asn.c
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@ -12988,7 +12988,6 @@ static int GenerateDNSEntryRIDString(DNS_entry* entry, void* heap)
{
int i, j, ret = 0;
int nameSz = 0;
int numerical = 0;
int nid = 0;
int tmpSize = MAX_OID_SZ;
word32 oid = 0;
@ -13019,18 +13018,23 @@ static int GenerateDNSEntryRIDString(DNS_entry* entry, void* heap)
ret = DecodeObjectId((const byte*)(entry->name),(word32)entry->len,
tmpName, (word32*)&tmpSize);
numerical = 1;
if (ret == 0) {
j = 0;
/* Append each number of dotted form. */
for (i = 0; i < tmpSize; i++) {
ret = XSNPRINTF(oidName + j, MAX_OID_SZ, "%d", tmpName[i]);
if (j > MAX_OID_SZ) {
return BUFFER_E;
}
if (i < tmpSize - 1) {
ret = XSNPRINTF(oidName + j, MAX_OID_SZ - j, "%d.", tmpName[i]);
}
else {
ret = XSNPRINTF(oidName + j, MAX_OID_SZ - j, "%d", tmpName[i]);
}
if (ret >= 0) {
j += ret;
if (i < tmpSize - 1) {
oidName[j] = '.';
j++;
}
}
else {
return BUFFER_E;
@ -13044,18 +13048,15 @@ static int GenerateDNSEntryRIDString(DNS_entry* entry, void* heap)
if (ret == 0) {
nameSz = (int)XSTRLEN((const char*)finalName);
entry->ridString = (char*)XMALLOC(nameSz + numerical, heap,
DYNAMIC_TYPE_ALTNAME);
entry->ridString = (char*)XMALLOC(nameSz + 1, heap,
DYNAMIC_TYPE_ALTNAME);
if (entry->ridString == NULL) {
ret = MEMORY_E;
}
if (ret == 0) {
XMEMCPY(entry->ridString, finalName, nameSz);
if (numerical) {
entry->ridString[nameSz] = '\0';
}
XMEMCPY(entry->ridString, finalName, nameSz + 1);
}
}