fixed compiler warning

OpenSC · Aug 27, 2019 · 9b4b080 · 9b4b080
1 parent a3fc769
commit 9b4b080
Showing 1 changed file with 4 additions and 5 deletions.
diff --git a/src/libopensc/asn1.c b/src/libopensc/asn1.c
@@ -574,15 +574,14 @@ static int decode_bit_string(const u8 * inbuf, size_t inlen, void *outbuf,
 	int zero_bits;
 	size_t octets_left;
 
-	if (outlen < octets_left)
-		return SC_ERROR_BUFFER_TOO_SMALL;
 	if (inlen < 1)
 		return SC_ERROR_INVALID_ASN1_OBJECT;
-
+	memset(outbuf, 0, outlen);
 	zero_bits = *in & 0x07;
-	octets_left = inlen - 1;
 	in++;
-	memset(outbuf, 0, outlen);
+	octets_left = inlen - 1;
+	if (outlen < octets_left)
+		return SC_ERROR_BUFFER_TOO_SMALL;
 
 	while (octets_left) {
 		/* 1st octet of input:  ABCDEFGH, where A is the MSB */