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Fix range checks with -offset and -length in asn1parse

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Reviewed-by: Rich Salz <rsalz@openssl.org>
Reviewed-by: Matthias St. Pierre <Matthias.St.Pierre@ncp-e.com>
(Merged from https://github.com/openssl/openssl/pull/5826)
This commit is contained in:
Bernd Edlinger 2018-04-02 09:13:49 +02:00
parent 18ada952d1
commit 16e1eea6a6
1 changed files with 2 additions and 2 deletions
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4
apps/asn1pars.c
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@ -258,14 +258,14 @@ int asn1parse_main(int argc, char **argv)
num = tmplen;
}
if (offset >= num) {
if (offset < 0 || offset >= num) {
BIO_printf(bio_err, "Error: offset too large\n");
goto end;
}
num -= offset;
if ((length == 0) || ((long)length > num))
if (length == 0 || length > (unsigned int)num)
length = (unsigned int)num;
if (derout != NULL) {
if (BIO_write(derout, str + offset, length) != (int)length) {