Support for ASN1 NULL type.

CHANGES

@@ -4,6 +4,13 @@
 
  Changes between 0.9.4 and 0.9.5  [xx XXX 1999]
 
+  *) Support for ASN1 "NULL" type. This could be handled before by using
+     ASN1_TYPE but there wasn't any function that would try to read a NULL
+     and produce an error if it couldn't. For compatability we also have
+     ASN1_NULL_new() and ASN1_NULL_free() functions but these are faked and
+     don't allocate anything because they don't need to.
+     [Steve Henson]
+
   *) Initial support for MacOS is now provided. Examine INSTALL.MacOS
      for details.
      [Andy Polyakov, Roy Woods <roy@centicsystems.ca>]

crypto/asn1/Makefile.ssl

@@ -23,7 +23,7 @@ APPS=
 
 LIB=$(TOP)/libcrypto.a
 LIBSRC=	a_object.c a_bitstr.c a_utctm.c a_gentm.c a_time.c a_int.c a_octet.c \
-	a_print.c a_type.c a_set.c a_dup.c a_d2i_fp.c a_i2d_fp.c a_bmp.c \
+	a_null.c a_print.c a_type.c a_set.c a_dup.c a_d2i_fp.c a_i2d_fp.c a_bmp.c \
 	a_enum.c a_vis.c a_utf8.c a_sign.c a_digest.c a_verify.c a_mbstr.c \
 	x_algor.c x_val.c x_pubkey.c x_sig.c x_req.c x_attrib.c \
 	x_name.c x_cinf.c x_x509.c x_x509a.c x_crl.c x_info.c x_spki.c nsseq.c \
@@ -38,7 +38,7 @@ LIBSRC=	a_object.c a_bitstr.c a_utctm.c a_gentm.c a_time.c a_int.c a_octet.c \
 	asn1_par.c asn1_lib.c asn1_err.c a_meth.c a_bytes.c a_strnid.c \
 	evp_asn1.c asn_pack.c p5_pbe.c p5_pbev2.c p8_pkey.c
 LIBOBJ= a_object.o a_bitstr.o a_utctm.o a_gentm.o a_time.o a_int.o a_octet.o \
-	a_print.o a_type.o a_set.o a_dup.o a_d2i_fp.o a_i2d_fp.o a_bmp.o \
+	a_null.o a_print.o a_type.o a_set.o a_dup.o a_d2i_fp.o a_i2d_fp.o a_bmp.o \
 	a_enum.o a_vis.o a_utf8.o a_sign.o a_digest.o a_verify.o a_mbstr.o \
 	x_algor.o x_val.o x_pubkey.o x_sig.o x_req.o x_attrib.o \
 	x_name.o x_cinf.o x_x509.o x_x509a.o x_crl.o x_info.o x_spki.o nsseq.o \

crypto/asn1/a_null.c

+/* a_null.c */
+/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
+ * project 1999.
+ */
+/* ====================================================================
+ * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer. 
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ *    software must display the following acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For written permission, please contact
+ *    licensing@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ *    nor may "OpenSSL" appear in their names without prior written
+ *    permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com).  This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+
+#include <stdio.h>
+#include "cryptlib.h"
+#include <openssl/asn1.h>
+
+/* ASN1 functions for NULL type. For compatability with other ASN1 code
+ * it returns a pointer to an "ASN1_NULL" structure. The new/free functions
+ * don't need to do any allocating because nothing is stored in a NULL.
+ */
+
+int i2d_ASN1_NULL(ASN1_NULL *a, unsigned char **pp)
+	{
+	if(!a) return 0;
+	if (pp) ASN1_put_object(pp,0,0,V_ASN1_NULL,V_ASN1_UNIVERSAL);
+	return 2;
+	}
+
+ASN1_NULL *d2i_ASN1_NULL(ASN1_NULL **a, unsigned char **pp, long length)
+	{
+	ASN1_NULL *ret = NULL;
+	unsigned char *p;
+	long len;
+	int inf,tag,xclass;
+	int i=0;
+
+	p= *pp;
+	inf=ASN1_get_object(&p,&len,&tag,&xclass,length);
+	if (inf & 0x80)
+		{
+		i=ASN1_R_BAD_OBJECT_HEADER;
+		goto err;
+		}
+
+	if (tag != V_ASN1_NULL)
+		{
+		i=ASN1_R_EXPECTING_A_NULL;
+		goto err;
+		}
+
+	if (len != 0)
+		{
+		i=ASN1_R_NULL_IS_WRONG_LENGTH;
+		goto err;
+		}
+	ret=(ASN1_NULL *)1;
+	if (a != NULL) (*a)=ret;
+	*pp=p;
+	return(ret);
+err:
+	ASN1err(ASN1_F_D2I_ASN1_NULL,i);
+	return(ret);
+	}
+
+ASN1_NULL *ASN1_NULL_new(void)
+{
+	return (ASN1_NULL *)1;
+}
+
+void ASN1_NULL_free(ASN1_NULL *a)
+{
+	return;
+}

crypto/asn1/asn1.h

@@ -268,6 +268,8 @@ typedef struct asn1_string_st ASN1_VISIBLESTRING;
 typedef struct asn1_string_st ASN1_UTF8STRING;
 #endif
 
+typedef int ASN1_NULL;
+
 typedef struct asn1_type_st
 	{
 	int type;
@@ -599,6 +601,11 @@ int		i2d_ASN1_UTF8STRING(ASN1_UTF8STRING *a,unsigned char **pp);
 ASN1_UTF8STRING *d2i_ASN1_UTF8STRING(ASN1_UTF8STRING **a,
 			unsigned char **pp,long length);
 
+ASN1_NULL *	ASN1_NULL_new(void);
+void		ASN1_NULL_free(ASN1_NULL *a);
+int		i2d_ASN1_NULL(ASN1_NULL *a,unsigned char **pp);
+ASN1_NULL *d2i_ASN1_NULL(ASN1_NULL **a, unsigned char **pp,long length);
+
 ASN1_BMPSTRING *	ASN1_BMPSTRING_new(void);
 void		ASN1_BMPSTRING_free(ASN1_BMPSTRING *a);
 int i2d_ASN1_BMPSTRING(ASN1_BMPSTRING *a, unsigned char **pp);
@@ -832,6 +839,7 @@ void ASN1_STRING_TABLE_cleanup(void);
 #define ASN1_F_D2I_ASN1_GENERALIZEDTIME			 223
 #define ASN1_F_D2I_ASN1_HEADER				 127
 #define ASN1_F_D2I_ASN1_INTEGER				 128
+#define ASN1_F_D2I_ASN1_NULL				 292
 #define ASN1_F_D2I_ASN1_OBJECT				 129
 #define ASN1_F_D2I_ASN1_OCTET_STRING			 130
 #define ASN1_F_D2I_ASN1_PRINT_TYPE			 131
@@ -1002,6 +1010,7 @@ void ASN1_STRING_TABLE_cleanup(void);
 #define ASN1_R_EXPECTING_A_BIT_STRING			 116
 #define ASN1_R_EXPECTING_A_BOOLEAN			 117
 #define ASN1_R_EXPECTING_A_GENERALIZEDTIME		 151
+#define ASN1_R_EXPECTING_A_NULL				 164
 #define ASN1_R_EXPECTING_A_TIME				 152
 #define ASN1_R_EXPECTING_A_UTCTIME			 118
 #define ASN1_R_FIRST_NUM_TOO_LARGE			 119
@@ -1019,6 +1028,7 @@ void ASN1_STRING_TABLE_cleanup(void);
 #define ASN1_R_MISSING_SECOND_NUMBER			 126
 #define ASN1_R_NON_HEX_CHARACTERS			 127
 #define ASN1_R_NOT_ENOUGH_DATA				 128
+#define ASN1_R_NULL_IS_WRONG_LENGTH			 165
 #define ASN1_R_ODD_NUMBER_OF_CHARS			 129
 #define ASN1_R_PARSING					 130
 #define ASN1_R_PRIVATE_KEY_HEADER_MISSING		 131

crypto/asn1/asn1_err.c

@@ -112,6 +112,7 @@ static ERR_STRING_DATA ASN1_str_functs[]=
 {ERR_PACK(0,ASN1_F_D2I_ASN1_GENERALIZEDTIME,0),	"d2i_ASN1_GENERALIZEDTIME"},
 {ERR_PACK(0,ASN1_F_D2I_ASN1_HEADER,0),	"d2i_ASN1_HEADER"},
 {ERR_PACK(0,ASN1_F_D2I_ASN1_INTEGER,0),	"d2i_ASN1_INTEGER"},
+{ERR_PACK(0,ASN1_F_D2I_ASN1_NULL,0),	"d2i_ASN1_NULL"},
 {ERR_PACK(0,ASN1_F_D2I_ASN1_OBJECT,0),	"d2i_ASN1_OBJECT"},
 {ERR_PACK(0,ASN1_F_D2I_ASN1_OCTET_STRING,0),	"d2i_ASN1_OCTET_STRING"},
 {ERR_PACK(0,ASN1_F_D2I_ASN1_PRINT_TYPE,0),	"D2I_ASN1_PRINT_TYPE"},
@@ -285,6 +286,7 @@ static ERR_STRING_DATA ASN1_str_reasons[]=
 {ASN1_R_EXPECTING_A_BIT_STRING           ,"expecting a bit string"},
 {ASN1_R_EXPECTING_A_BOOLEAN              ,"expecting a boolean"},
 {ASN1_R_EXPECTING_A_GENERALIZEDTIME      ,"expecting a generalizedtime"},
+{ASN1_R_EXPECTING_A_NULL                 ,"expecting a null"},
 {ASN1_R_EXPECTING_A_TIME                 ,"expecting a time"},
 {ASN1_R_EXPECTING_A_UTCTIME              ,"expecting a utctime"},
 {ASN1_R_FIRST_NUM_TOO_LARGE              ,"first num too large"},
@@ -302,6 +304,7 @@ static ERR_STRING_DATA ASN1_str_reasons[]=
 {ASN1_R_MISSING_SECOND_NUMBER            ,"missing second number"},
 {ASN1_R_NON_HEX_CHARACTERS               ,"non hex characters"},
 {ASN1_R_NOT_ENOUGH_DATA                  ,"not enough data"},
+{ASN1_R_NULL_IS_WRONG_LENGTH             ,"null is wrong length"},
 {ASN1_R_ODD_NUMBER_OF_CHARS              ,"odd number of chars"},
 {ASN1_R_PARSING                          ,"parsing"},
 {ASN1_R_PRIVATE_KEY_HEADER_MISSING       ,"private key header missing"},

crypto/asn1/asn1_mac.h

@@ -111,7 +111,7 @@ err:\
 	c.slen = length;
 
 /* End reading ASN1 with no check on length */
-#define M_ASN1_D2I_Finish_nolen() \
+#define M_ASN1_D2I_Finish_nolen(a, func, e) \
 	*pp=c.p; \
 	if (a != NULL) (*a)=ret; \
 	return(ret); \