From: Ralph Corderoy <ralph@inputplus.co.uk>
Date: Sat, 2 Sep 2017 12:55:29 +0000 (+0100)
Subject: decodeBase64(): Limit length of error message on invalid input.
X-Git-Url: https://diplodocus.org/git/nmh/commitdiff_plain/4d19fdf096abcc02a7860b69a445e1998a26917c?ds=sidebyside

decodeBase64(): Limit length of error message on invalid input.

Screenfuls of email were appearing on stderr.
---

diff --git a/sbr/base64.c b/sbr/base64.c
index 8426fb2f..995f9556 100644
--- a/sbr/base64.c
+++ b/sbr/base64.c
@@ -257,7 +257,8 @@ decodeBase64 (const char *encoded, unsigned char **decoded, size_t *len,
                 }
                 if (skip  ||  (((unsigned char) *cp) & 0x80)  ||
                     (value = b642nib[((unsigned char) *cp) & 0x7f]) > 0x3f) {
-                    inform("invalid BASE64 encoding in %s", cp);
+                    inform("invalid base64 byte %#x: %.42s",
+                        *(unsigned char *)cp, cp);
                     charstring_free (decoded_c);
                     *decoded = NULL;