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-rw-r--r--crypto/conf/conf_def.c16
1 files changed, 15 insertions, 1 deletions
diff --git a/crypto/conf/conf_def.c b/crypto/conf/conf_def.c
index 3d710f12ae07..31c02cc49e22 100644
--- a/crypto/conf/conf_def.c
+++ b/crypto/conf/conf_def.c
@@ -1,5 +1,5 @@
/*
- * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
@@ -185,6 +185,7 @@ static int def_load_bio(CONF *conf, BIO *in, long *line)
BUF_MEM *buff = NULL;
char *s, *p, *end;
int again;
+ int first_call = 1;
long eline = 0;
char btmp[DECIMAL_SIZE(eline) + 1];
CONF_VALUE *v = NULL, *tv;
@@ -233,6 +234,19 @@ static int def_load_bio(CONF *conf, BIO *in, long *line)
BIO_gets(in, p, CONFBUFSIZE - 1);
p[CONFBUFSIZE - 1] = '\0';
ii = i = strlen(p);
+ if (first_call) {
+ /* Other BOMs imply unsupported multibyte encoding,
+ * so don't strip them and let the error raise */
+ const unsigned char utf8_bom[3] = {0xEF, 0xBB, 0xBF};
+
+ if (i >= 3 && memcmp(p, utf8_bom, 3) == 0) {
+ memmove(p, p + 3, i - 3);
+ p[i - 3] = 0;
+ i -= 3;
+ ii -= 3;
+ }
+ first_call = 0;
+ }
if (i == 0 && !again) {
/* the currently processed BIO is at EOF */
BIO *parent;