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-rw-r--r--cgit.c22
1 files changed, 8 insertions, 14 deletions
diff --git a/cgit.c b/cgit.c
index c52ef33..be1265d 100644
--- a/cgit.c
+++ b/cgit.c
@@ -614,22 +614,19 @@ static inline void open_auth_filter(struct cgit_context *ctx, const char *functi
614 ctx->qry.url ? ctx->qry.url : ""); 614 ctx->qry.url ? ctx->qry.url : "");
615} 615}
616 616
617/* We intentionally keep this rather small, instead of looping and
618 * feeding it to the filter a couple bytes at a time. This way, the
619 * filter itself does not need to handle any denial of service or
620 * buffer bloat issues. If this winds up being too small, people
621 * will complain on the mailing list, and we'll increase it as needed. */
617#define MAX_AUTHENTICATION_POST_BYTES 4096 622#define MAX_AUTHENTICATION_POST_BYTES 4096
623/* The filter is expected to spit out "Status: " and all headers. */
618static inline void authenticate_post(struct cgit_context *ctx) 624static inline void authenticate_post(struct cgit_context *ctx)
619{ 625{
620 if (ctx->env.http_referer && strlen(ctx->env.http_referer) > 0) {
621 html("Status: 302 Redirect\n");
622 html("Cache-Control: no-cache, no-store\n");
623 htmlf("Location: %s\n", ctx->env.http_referer);
624 } else {
625 html("Status: 501 Missing Referer\n");
626 html("Cache-Control: no-cache, no-store\n\n");
627 exit(0);
628 }
629
630 open_auth_filter(ctx, "authenticate-post");
631 char buffer[MAX_AUTHENTICATION_POST_BYTES]; 626 char buffer[MAX_AUTHENTICATION_POST_BYTES];
632 int len; 627 int len;
628
629 open_auth_filter(ctx, "authenticate-post");
633 len = ctx->env.content_length; 630 len = ctx->env.content_length;
634 if (len > MAX_AUTHENTICATION_POST_BYTES) 631 if (len > MAX_AUTHENTICATION_POST_BYTES)
635 len = MAX_AUTHENTICATION_POST_BYTES; 632 len = MAX_AUTHENTICATION_POST_BYTES;
@@ -637,10 +634,7 @@ static inline void authenticate_post(struct cgit_context *ctx)
637 die_errno("Could not read POST from stdin"); 634 die_errno("Could not read POST from stdin");
638 if (write(STDOUT_FILENO, buffer, len) < 0) 635 if (write(STDOUT_FILENO, buffer, len) < 0)
639 die_errno("Could not write POST to stdout"); 636 die_errno("Could not write POST to stdout");
640 /* The filter may now spit out a Set-Cookie: ... */
641 cgit_close_filter(ctx->cfg.auth_filter); 637 cgit_close_filter(ctx->cfg.auth_filter);
642
643 html("\n");
644 exit(0); 638 exit(0);
645} 639}
646 640