From: Stephan Bosch <stephan.bosch@open-xchange.com>
Date: Tue, 3 Sep 2019 19:10:55 +0000 (+0200)
Subject: lib: base64 - Add more w_buf_len assertions to encoder.
X-Git-Tag: 2.3.8~107
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=41d3d67dbaf22199ac9d3db8baf4ef59d0aeb7fa;p=thirdparty%2Fdovecot%2Fcore.git

lib: base64 - Add more w_buf_len assertions to encoder.
---

diff --git a/src/lib/base64.c b/src/lib/base64.c
index 1970cde890..9aec963b58 100644
--- a/src/lib/base64.c
+++ b/src/lib/base64.c
@@ -381,6 +381,7 @@ bool base64_encode_finish(struct base64_encoder *enc, buffer_t *dest)
 	case 0:
 		break;
 	case 1:
+		i_assert(w_buf_len < (sizeof(w_buf) - 3));
 		w_buf[w_buf_len] = b64enc[enc->buf];
 		w_buf_len ++;
 		if (padding) {
@@ -390,6 +391,7 @@ bool base64_encode_finish(struct base64_encoder *enc, buffer_t *dest)
 		}
 		break;
 	case 2:
+		i_assert(w_buf_len < (sizeof(w_buf) - 2));
 		w_buf[w_buf_len] = b64enc[enc->buf];
 		w_buf_len++;
 		if (padding) {