romenskiy2012/curl
1
0
Fork 0
mirror of https://github.com/curl/curl.git synced 2026-08-25 12:33:35 +03:00
Code Issues Projects Releases Packages Wiki Activity

examples: safer and more proper read callback logic

Browse source 
The same callback code is used in:

 imap-append.c
 smtp-authzid.c
 smtp-mail.c
 smtp-multi.c
 smtp-ssl.c
 smtp-tls.c

It should not assume that it can copy full lines into the buffer as it
will encourage sloppy coding practices. Instead use byte-wise logic and
check/acknowledge the buffer size appropriately.

Reported-by: Harry Sintonen
Fixes #7330
Closes #7331
This commit is contained in:
Daniel Stenberg 2021-07-01 09:21:40 +02:00
parent 07fa74d34a
commit a37fc62e8b
No known key found for this signature in database
GPG key ID: 5CC908FDB71E12C2
6 changed files with 139 additions and 149 deletions
Download patch file Download diff file Expand all files Collapse all files

41
docs/examples/smtp-authzid.c
View file

@ -5,7 +5,7 @@
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
* Copyright (C) 1998 - 2021, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
@ -47,41 +47,42 @@
#define SENDER_MAIL "Kurt " SENDER_ADDR
#define TO_MAIL "A Receiver " TO_ADDR
static const char *payload_text[] = {
"Date: Mon, 29 Nov 2010 21:54:29 +1100\r\n",
"To: " TO_MAIL "\r\n",
"From: " FROM_MAIL "\r\n",
"Sender: " SENDER_MAIL "\r\n",
static const char *payload_text =
"Date: Mon, 29 Nov 2010 21:54:29 +1100\r\n"
"To: " TO_MAIL "\r\n"
"From: " FROM_MAIL "\r\n"
"Sender: " SENDER_MAIL "\r\n"
"Message-ID: <dcd7cb36-11db-487a-9f3a-e652a9458efd@"
"rfcpedant.example.org>\r\n",
"Subject: SMTP example message\r\n",
"\r\n", /* empty line to divide headers from body, see RFC5322 */
"The body of the message starts here.\r\n",
"\r\n",
"It could be a lot of lines, could be MIME encoded, whatever.\r\n",
"Check RFC5322.\r\n",
NULL
};
"rfcpedant.example.org>\r\n"
"Subject: SMTP example message\r\n"
"\r\n" /* empty line to divide headers from body, see RFC5322 */
"The body of the message starts here.\r\n"
"\r\n"
"It could be a lot of lines, could be MIME encoded, whatever.\r\n"
"Check RFC5322.\r\n";
struct upload_status {
int lines_read;
size_t bytes_read;
};
static size_t payload_source(char *ptr, size_t size, size_t nmemb, void *userp)
{
struct upload_status *upload_ctx = (struct upload_status *)userp;
const char *data;
size_t room = size * nmemb;
if((size == 0) || (nmemb == 0) || ((size*nmemb) < 1)) {
return 0;
}
data = payload_text[upload_ctx->lines_read];
data = &payload_text[upload_ctx->bytes_read];
if(data) {
size_t len = strlen(data);
if(room < len)
len = room;
memcpy(ptr, data, len);
upload_ctx->lines_read++;
upload_ctx->bytes_read += len;
return len;
}
@ -94,9 +95,7 @@ int main(void)
CURL *curl;
CURLcode res = CURLE_OK;
struct curl_slist *recipients = NULL;
struct upload_status upload_ctx;
upload_ctx.lines_read = 0;
struct upload_status upload_ctx = { 0 };
curl = curl_easy_init();
if(curl) {