Commit 662ede23 authored by Dr. Stephen Henson's avatar Dr. Stephen Henson
Browse files

Fix for ASN1 parsing bugs.

parent d0edf6e5

CHANGES

+22 −0
Original line number Diff line number Diff line
@@ -4,6 +4,18 @@ 


 Changes between 0.9.7b and 0.9.7c  [xx XXX 2003]



  *) Fix various bugs revealed by running the NISCC test suite:



     Stop out of bounds reads in the ASN1 code when presented with

     invalid tags (CAN-2003-0543 and CAN-2003-0544).

     

     Free up ASN1_TYPE correctly if ANY type is invalid (CAN-2003-0545).



     If verify callback ignores invalid public key errors don't try to check

     certificate signature with the NULL public key.



     [Steve Henson]



  *) New -ignore_err option in ocsp application to stop the server

     exiting on the first error in a request.

     [Steve Henson]
@@ -1982,6 +1994,16 @@ des-cbc 3624.96k 5258.21k 5530.91k 5624.30k 5628.26k 


 Changes between 0.9.6j and 0.9.6k  [xx XXX 2003]



  *) Fix various bugs revealed by running the NISCC test suite:



     Stop out of bounds reads in the ASN1 code when presented with

     invalid tags (CAN-2003-0543 and CAN-2003-0544).

     

     If verify callback ignores invalid public key errors don't try to check

     certificate signature with the NULL public key.



     [Steve Henson]



  *) In ssl3_accept() (ssl/s3_srvr.c) only accept a client certificate

     if the server requested one: as stated in TLS 1.0 and SSL 3.0

     specifications.

crypto/asn1/asn1_lib.c

+2 −0
Original line number Diff line number Diff line
@@ -104,10 +104,12 @@ int ASN1_get_object(unsigned char **pp, long *plength, int *ptag, int *pclass, 
			l<<=7L;

			l|= *(p++)&0x7f;

			if (--max == 0) goto err;

			if (l > (INT_MAX >> 7L)) goto err;

			}

		l<<=7L;

		l|= *(p++)&0x7f;

		tag=(int)l;

		if (--max == 0) goto err;

		}

	else

		{

crypto/asn1/tasn_dec.c

+8 −1
Original line number Diff line number Diff line
@@ -691,6 +691,7 @@ static int asn1_d2i_ex_primitive(ASN1_VALUE **pval, unsigned char **in, long inl 


int asn1_ex_c2i(ASN1_VALUE **pval, unsigned char *cont, int len, int utype, char *free_cont, const ASN1_ITEM *it)

{

	ASN1_VALUE **opval = NULL;

	ASN1_STRING *stmp;

	ASN1_TYPE *typ = NULL;

	int ret = 0;
@@ -705,6 +706,7 @@ int asn1_ex_c2i(ASN1_VALUE **pval, unsigned char *cont, int len, int utype, char 
			*pval = (ASN1_VALUE *)typ;

		} else typ = (ASN1_TYPE *)*pval;

		if(utype != typ->type) ASN1_TYPE_set(typ, utype, NULL);

		opval = pval;

		pval = (ASN1_VALUE **)&typ->value.ptr;

	}

	switch(utype) {
@@ -796,7 +798,12 @@ int asn1_ex_c2i(ASN1_VALUE **pval, unsigned char *cont, int len, int utype, char 


	ret = 1;

	err:

	if(!ret) ASN1_TYPE_free(typ);

	if(!ret)

		{

		ASN1_TYPE_free(typ);

		if (opval)

			*opval = NULL;

		}

	return ret;

}

crypto/x509/x509_vfy.c

+1 −1
Original line number Diff line number Diff line
@@ -674,7 +674,7 @@ static int internal_verify(X509_STORE_CTX *ctx) 
				ok=(*cb)(0,ctx);

				if (!ok) goto end;

				}

			if (X509_verify(xs,pkey) <= 0)

			else if (X509_verify(xs,pkey) <= 0)

				/* XXX  For the final trusted self-signed cert,

				 * this is a waste of time.  That check should

				 * optional so that e.g. 'openssl x509' can be