Commit 0e7bda79 authored by Dr. Stephen Henson's avatar Dr. Stephen Henson
Browse files

Handle BER length encoding. 

Tolerate BER length encoding which may include leading zeroes.

PR#2746
parent a356e488

crypto/asn1/asn1_lib.c

+8 −2
Original line number Diff line number Diff line
@@ -170,14 +170,20 @@ static int asn1_get_length(const unsigned char **pp, int *inf, long *rl, int max 
		i= *p&0x7f;

		if (*(p++) & 0x80)

			{

			if (max < (int)i)

				return 0;

			/* Skip leading zeroes */

			while (i && *p == 0)

				{

				p++;

				i--;

				}

			if (i > sizeof(long))

				return 0;

			if (max-- == 0) return(0);

			while (i-- > 0)

				{

				ret<<=8L;

				ret|= *(p++);

				if (max-- == 0) return(0);

				}

			}

		else