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Send challenge page if client didn't verify yet

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mrkubax10
2026-04-29 23:01:10 +02:00
parent be1f75c35b
commit fb14079ada
1 changed files with 41 additions and 3 deletions
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mod_webgate.c
+41 -3
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@@ -25,7 +25,7 @@ static bool check_user_agent_exception(request_rec* r) {
return apr_table_get(r->headers_in, "Git-Protocol");
}
static char* generate_token(apr_pool_t* pool) {
static const char* generate_token(apr_pool_t* pool) {
char rnd[32];
apr_generate_random_bytes(rnd, sizeof(rnd));
char rnd_md5[APR_MD5_DIGESTSIZE];
@@ -39,9 +39,47 @@ static char* generate_token(apr_pool_t* pool) {
// Generates new token and sets HTTP cookie containing it then presents client with challenge
static void handle_challenge(request_rec* r) {
char* generated = generate_token(r->pool);
const char* const generated = generate_token(r->pool);
ap_cookie_write(r, TOKEN_COOKIE_NAME, generated, NULL, 0, r->headers_out, NULL);
ap_rprintf(r, "Token: %s\n", generated);
// Send challenge page beginning
ap_set_content_type(r, "text/html");
ap_rvputs(r, "<!DOCTYPE HTML>"
"<html lang=\"en\">"
"<head>"
"<title>mod_webgate</title>"
"</head>"
"<body>"
"<h5>mod_webgate: Please select appropriate option</h5>", NULL);
static const char* OPTION_STRINGS[] = {
"<a href=\"/fail\">I would like to access this server</a><br>",
"<a href=\"/success\">I would not like to access this server</a><br>",
};
unsigned char option_order[] = {
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0
};
// Randomize options order
for(size_t i = 0; i<sizeof(option_order); i++) {
char swap_index;
apr_generate_random_bytes(&swap_index, 1);
swap_index%=sizeof(option_order);
if(swap_index==0)
swap_index = 1;
// Temporary value for swap
unsigned char temp = option_order[1];
option_order[1] = option_order[swap_index];
option_order[swap_index] = temp;
}
// Send options
for(size_t i = 0; i<sizeof(option_order); i++)
ap_rvputs(r, OPTION_STRINGS[option_order[i]], NULL);
// Finish page
ap_rvputs(r, "</body>"
"</html>", NULL);
}
static int request_check_handler(request_rec* r) {