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ntlm_wb: Fix hard-coded limit on NTLM auth packet size

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Bumping it to 1KiB in commit aaaf9e50ec is all very well, but having hit
a hard limit once let's just make it cope by reallocating as necessary.
This commit is contained in:
David Woodhouse 2014-07-11 10:27:18 +01:00 committed by Daniel Stenberg
parent df5169fa35
commit 9008f3d564
1 changed files with 25 additions and 14 deletions
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39
lib/curl_ntlm_wb.c
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@ -227,11 +227,11 @@ done:
static CURLcode ntlm_wb_response(struct connectdata *conn,
const char *input, curlntlm state)
{
ssize_t size;
char buf[NTLM_BUFSIZE];
char *tmpbuf = buf;
size_t len_in = strlen(input);
size_t len_out = sizeof(buf);
char *buf = malloc(NTLM_BUFSIZE);
size_t len_in = strlen(input), len_out = 0;
if(!buf)
return CURLE_OUT_OF_MEMORY;
while(len_in > 0) {
ssize_t written = swrite(conn->ntlm_auth_hlpr_socket, input, len_in);
@ -246,8 +246,11 @@ static CURLcode ntlm_wb_response(struct connectdata *conn,
len_in -= written;
}
/* Read one line */
while(len_out > 0) {
size = sread(conn->ntlm_auth_hlpr_socket, tmpbuf, len_out);
while(1) {
ssize_t size;
char *newbuf;
size = sread(conn->ntlm_auth_hlpr_socket, buf + len_out, NTLM_BUFSIZE);
if(size == -1) {
if(errno == EINTR)
continue;
@ -255,22 +258,28 @@ static CURLcode ntlm_wb_response(struct connectdata *conn,
}
else if(size == 0)
goto done;
else if(tmpbuf[size - 1] == '\n') {
tmpbuf[size - 1] = '\0';
len_out += size;
if(buf[len_out - 1] == '\n') {
buf[len_out - 1] = '\0';
goto wrfinish;
}
tmpbuf += size;
len_out -= size;
newbuf = realloc(buf, len_out + NTLM_BUFSIZE);
if(!newbuf) {
free(buf);
return CURLE_OUT_OF_MEMORY;
}
buf = newbuf;
}
goto done;
wrfinish:
/* Samba/winbind installed but not configured */
if(state == NTLMSTATE_TYPE1 &&
size == 3 &&
len_out == 3 &&
buf[0] == 'P' && buf[1] == 'W')
return CURLE_REMOTE_ACCESS_DENIED;
/* invalid response */
if(size < 4)
if(len_out < 4)
goto done;
if(state == NTLMSTATE_TYPE1 &&
(buf[0]!='Y' || buf[1]!='R' || buf[2]!=' '))
@ -280,9 +289,11 @@ wrfinish:
(buf[0]!='A' || buf[1]!='F' || buf[2]!=' '))
goto done;
conn->response_header = aprintf("NTLM %.*s", size - 4, buf + 3);
conn->response_header = aprintf("NTLM %.*s", len_out - 4, buf + 3);
free(buf);
return CURLE_OK;
done:
free(buf);
return CURLE_REMOTE_ACCESS_DENIED;
}