ui-ssdiff: ban strncpy()

[cgit.git] / ui-snapshot.c

diff --git a/ui-snapshot.c b/ui-snapshot.c
index b9e2a36f9dd57a475c364437c7de82d487986565..fa3ceafe65473a015f4a0ff0e6d97b9dcfc54677 100644 (file)
--- a/ui-snapshot.c
+++ b/ui-snapshot.c
@@ -86,14 +86,40 @@ static int write_tar_xz_archive(const char *hex, const char *prefix)
 }
 
 const struct cgit_snapshot_format cgit_snapshot_formats[] = {
-       { ".zip", "application/x-zip", write_zip_archive, 0x01 },
-       { ".tar.gz", "application/x-gzip", write_tar_gzip_archive, 0x02 },
-       { ".tar.bz2", "application/x-bzip2", write_tar_bzip2_archive, 0x04 },
-       { ".tar", "application/x-tar", write_tar_archive, 0x08 },
-       { ".tar.xz", "application/x-xz", write_tar_xz_archive, 0x10 },
+       /* .tar must remain the 0 index */
+       { ".tar",       "application/x-tar",    write_tar_archive       },
+       { ".tar.gz",    "application/x-gzip",   write_tar_gzip_archive  },
+       { ".tar.bz2",   "application/x-bzip2",  write_tar_bzip2_archive },
+       { ".tar.xz",    "application/x-xz",     write_tar_xz_archive    },
+       { ".zip",       "application/x-zip",    write_zip_archive       },
        { NULL }
 };
 
+static struct notes_tree snapshot_sig_notes[ARRAY_SIZE(cgit_snapshot_formats)];
+
+const struct object_id *cgit_snapshot_get_sig(const char *ref,
+                                             const struct cgit_snapshot_format *f)
+{
+       struct notes_tree *tree;
+       struct object_id oid;
+
+       if (get_oid(ref, &oid))
+               return NULL;
+
+       tree = &snapshot_sig_notes[f - &cgit_snapshot_formats[0]];
+       if (!tree->initialized) {
+               struct strbuf notes_ref = STRBUF_INIT;
+
+               strbuf_addf(&notes_ref, "refs/notes/signatures/%s",
+                           f->suffix + 1);
+
+               init_notes(tree, notes_ref.buf, combine_notes_ignore, 0);
+               strbuf_release(&notes_ref);
+       }
+
+       return get_note(tree, &oid);
+}
+
 static const struct cgit_snapshot_format *get_format(const char *filename)
 {
        const struct cgit_snapshot_format *fmt;
@@ -105,6 +131,11 @@ static const struct cgit_snapshot_format *get_format(const char *filename)
        return NULL;
 }
 
+const unsigned cgit_snapshot_format_bit(const struct cgit_snapshot_format *f)
+{
+       return BIT(f - &cgit_snapshot_formats[0]);
+}
+
 static int make_snapshot(const struct cgit_snapshot_format *format,
                         const char *hex, const char *prefix,
                         const char *filename)
@@ -129,6 +160,39 @@ static int make_snapshot(const struct cgit_snapshot_format *format,
        return 0;
 }
 
+static int write_sig(const struct cgit_snapshot_format *format,
+                    const char *hex, const char *archive,
+                    const char *filename)
+{
+       const struct object_id *note = cgit_snapshot_get_sig(hex, format);
+       enum object_type type;
+       unsigned long size;
+       char *buf;
+
+       if (!note) {
+               cgit_print_error_page(404, "Not found",
+                               "No signature for %s", archive);
+               return 0;
+       }
+
+       buf = read_object_file(note, &type, &size);
+       if (!buf) {
+               cgit_print_error_page(404, "Not found", "Not found");
+               return 0;
+       }
+
+       html("X-Content-Type-Options: nosniff\n");
+       html("Content-Security-Policy: default-src 'none'\n");
+       ctx.page.etag = oid_to_hex(note);
+       ctx.page.mimetype = xstrdup("application/pgp-signature");
+       ctx.page.filename = xstrdup(filename);
+       cgit_print_http_headers();
+
+       html_raw(buf, size);
+       free(buf);
+       return 0;
+}
+
 /* Try to guess the requested revision from the requested snapshot name.
  * First the format extension is stripped, e.g. "cgit-0.7.2.tar.gz" become
  * "cgit-0.7.2". If this is a valid commit object name we've got a winner.
@@ -185,6 +249,8 @@ void cgit_print_snapshot(const char *head, const char *hex,
                         const char *filename, int dwim)
 {
        const struct cgit_snapshot_format* f;
+       const char *sig_filename = NULL;
+       char *adj_filename = NULL;
        char *prefix = NULL;
 
        if (!filename) {
@@ -193,8 +259,17 @@ void cgit_print_snapshot(const char *head, const char *hex,
                return;
        }
 
+       if (ends_with(filename, ".asc")) {
+               sig_filename = filename;
+
+               /* Strip ".asc" from filename for common format processing */
+               adj_filename = xstrdup(filename);
+               adj_filename[strlen(adj_filename) - 4] = '\0';
+               filename = adj_filename;
+       }
+
        f = get_format(filename);
-       if (!f) {
+       if (!f || (!sig_filename && !(ctx.repo->snapshots & cgit_snapshot_format_bit(f)))) {
                cgit_print_error_page(400, "Bad request",
                                "Unsupported snapshot format: %s", filename);
                return;
@@ -216,6 +291,11 @@ void cgit_print_snapshot(const char *head, const char *hex,
        if (!prefix)
                prefix = xstrdup(cgit_snapshot_prefix(ctx.repo));
 
-       make_snapshot(f, hex, prefix, filename);
+       if (sig_filename)
+               write_sig(f, hex, filename, sig_filename);
+       else
+               make_snapshot(f, hex, prefix, filename);
+
        free(prefix);
+       free(adj_filename);
 }