diff options
Diffstat (limited to 'usr.sbin/acme-client/chngproc.c')
| -rw-r--r-- | usr.sbin/acme-client/chngproc.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/usr.sbin/acme-client/chngproc.c b/usr.sbin/acme-client/chngproc.c index 0cbfaf27c31..63c0d4dc25d 100644 --- a/usr.sbin/acme-client/chngproc.c +++ b/usr.sbin/acme-client/chngproc.c @@ -1,4 +1,4 @@ -/* $Id: chngproc.c,v 1.16 2021/07/12 15:09:20 beck Exp $ */ +/* $Id: chngproc.c,v 1.17 2022/05/05 19:51:35 florian Exp $ */ /* * Copyright (c) 2016 Kristaps Dzonsons <kristaps@bsd.lv> * @@ -16,6 +16,7 @@ */ #include <assert.h> +#include <ctype.h> #include <err.h> #include <errno.h> #include <fcntl.h> @@ -77,6 +78,18 @@ chngproc(int netsock, const char *root) goto out; else if ((tok = readstr(netsock, COMM_TOK)) == NULL) goto out; + else if (strlen(tok) < 1) { + warnx("token is too short"); + goto out; + } + + for (i = 0; tok[i]; ++i) { + int ch = (unsigned char)tok[i]; + if (!isalnum(ch) && ch != '-' && ch != '_') { + warnx("token is not a valid base64url"); + goto out; + } + } if (asprintf(&fmt, "%s.%s", tok, th) == -1) { warn("asprintf"); |