feedc0de/wolfssl
1
0
Fork 0
forked from wolfSSL/wolfssl
Code Pull Requests Activity

GCC-8 string fixes

Browse Source 
1. Modify wolfSSL_get_ciphers() to limit the XSTRNCPY based on the dst buf length, not the src string.
This commit is contained in:
John Safranek
2018-06-20 15:55:03 -07:00
parent 2e1a1681ec
commit ed208efc4d
1 changed files with 12 additions and 17 deletions
Download Patch File Download Diff File Expand all files Collapse all files

29
src/ssl.c
View File

@@ -692,30 +692,25 @@ char* wolfSSL_get_cipher_list_ex(WOLFSSL* ssl, int priority)
int wolfSSL_get_ciphers(char* buf, int len)
{
const CipherSuiteInfo* ciphers = GetCipherNames();
int totalInc = 0;
int step = 0;
char delim = ':';
int size = GetCipherNamesSize();
int i;
int ciphersSz = GetCipherNamesSize();
int i;
int cipherNameSz;
if (buf == NULL || len <= 0)
return BAD_FUNC_ARG;
/* Add each member to the buffer delimited by a : */
for (i = 0; i < size; i++) {
step = (int)(XSTRLEN(ciphers[i].name) + 1); /* delimiter */
totalInc += step;
for (i = 0; i < ciphersSz; i++) {
cipherNameSz = (int)XSTRLEN(ciphers[i].name);
if (cipherNameSz + 1 < len) {
XSTRNCPY(buf, ciphers[i].name, len);
buf += cipherNameSz;
/* Check to make sure buf is large enough and will not overflow */
if (totalInc < len) {
size_t cipherLen = XSTRLEN(ciphers[i].name);
XSTRNCPY(buf, ciphers[i].name, cipherLen);
buf += cipherLen;
if (i < ciphersSz - 1)
*buf++ = ':';
*buf = 0;
if (i < size - 1)
*buf++ = delim;
else
*buf++ = '\0';
len -= cipherNameSz + 1;
}
else
return BUFFER_E;