New function to convert ASN1 tag values to strings. Also fix typo in asn1.h

CHANGES

@@ -4,6 +4,10 @@
 
  Changes between 0.9.4 and 0.9.5  [xx XXX 1999]
 
+  *) New function ANS1_tag2str() to convert an ASN1 tag to a descriptive
+     ASCII string. This was handled independently in various places before.
+     [Steve Henson]
+
   *) New functions UTF8_getc() and UTF8_putc() that parse and generate
      UTF8 strings a character at a time.
      [Steve Henson]

crypto/asn1/asn1.h

@@ -379,7 +379,7 @@ typedef struct asn1_header_st
 		(ASN1_PRINTABLESTRING *)d2i_ASN1_type_bytes\
 		((ASN1_STRING **)a,pp,l,B_ASN1_PRINTABLESTRING)
 
-#define ASN1_T61STRING_new()	(ASN1_T61STRING_STRING *)\
+#define ASN1_T61STRING_new()	(ASN1_T61STRING *)\
 		ASN1_STRING_type_new(V_ASN1_T61STRING)
 #define ASN1_T61STRING_free(a)	ASN1_STRING_free((ASN1_STRING *)a)
 #define M_i2d_ASN1_T61STRING(a,pp) \
@@ -658,6 +658,7 @@ int ASN1_TIME_print(BIO *fp,ASN1_TIME *a);
 int ASN1_STRING_print(BIO *bp,ASN1_STRING *v);
 int ASN1_parse(BIO *bp,unsigned char *pp,long len,int indent);
 #endif
+const char *ASN1_tag2str(int tag);
 
 /* Used to load and write netscape format cert/key */
 int i2d_ASN1_HEADER(ASN1_HEADER *a,unsigned char **pp);

crypto/asn1/asn1_par.c

@@ -93,55 +93,8 @@ static int asn1_print_info(BIO *bp, int tag, int xclass, int constructed,
 		sprintf(str,"cont [ %d ]",tag);
 	else if ((xclass & V_ASN1_APPLICATION) == V_ASN1_APPLICATION)
 		sprintf(str,"appl [ %d ]",tag);
-	else if ((tag == V_ASN1_EOC) /* && (xclass == V_ASN1_UNIVERSAL) */)
-		p="EOC";
-	else if (tag == V_ASN1_BOOLEAN)
-		p="BOOLEAN";
-	else if (tag == V_ASN1_INTEGER)
-		p="INTEGER";
-	else if (tag == V_ASN1_ENUMERATED)
-		p="ENUMERATED";
-	else if (tag == V_ASN1_BIT_STRING)
-		p="BIT STRING";
-	else if (tag == V_ASN1_OCTET_STRING)
-		p="OCTET STRING";
-	else if (tag == V_ASN1_NULL)
-		p="NULL";
-	else if (tag == V_ASN1_OBJECT)
-		p="OBJECT";
-	else if (tag == V_ASN1_SEQUENCE)
-		p="SEQUENCE";
-	else if (tag == V_ASN1_SET)
-		p="SET";
-	else if (tag == V_ASN1_PRINTABLESTRING)
-		p="PRINTABLESTRING";
-	else if (tag == V_ASN1_T61STRING)
-		p="T61STRING";
-	else if (tag == V_ASN1_IA5STRING)
-		p="IA5STRING";
-	else if (tag == V_ASN1_UTCTIME)
-		p="UTCTIME";
+	else p = ASN1_tag2str(tag);
 
-	/* extras */
-	else if (tag == V_ASN1_NUMERICSTRING)
-		p="NUMERICSTRING";
-	else if (tag == V_ASN1_VIDEOTEXSTRING)
-		p="VIDEOTEXSTRING";
-	else if (tag == V_ASN1_GENERALIZEDTIME)
-		p="GENERALIZEDTIME";
-	else if (tag == V_ASN1_GRAPHICSTRING)
-		p="GRAPHICSTRING";
-	else if (tag == V_ASN1_VISIBLESTRING)
-		p="VISIBLESTRING";
-	else if (tag == V_ASN1_GENERALSTRING)
-		p="GENERALSTRING";
-	else if (tag == V_ASN1_UNIVERSALSTRING)
-		p="UNIVERSALSTRING";
-	else if (tag == V_ASN1_BMPSTRING)
-		p="BMPSTRING";
-	else
-		p2="(unknown)";
-		
 	if (p2 != NULL)
 		{
 		if (BIO_printf(bp,fmt2,tag,p2) <= 0) goto err;
@@ -409,3 +362,24 @@ end:
 	*pp=p;
 	return(ret);
 	}
+
+const char *ASN1_tag2str(int tag)
+{
+	const static char *tag2str[] = {
+	 "EOC", "BOOLEAN", "INTEGER", "BIT STRING", "OCTET STRING", /* 0-4 */
+	 "NULL", "OBJECT", "OBJECT DESCRIPTOR", "EXTERNAL", "REAL", /* 5-9 */
+	 "ENUMERATED", "<ASN1 11>", "UTF8STRING", "<ASN1 13>", 	    /* 10-13 */
+	"<ASN1 14>", "<ASN1 15>", "SEQUENCE", "SET", 		    /* 15-17 */
+	"NUMERICSTRING", "PRINTABLESTRING", "T61STRING",	    /* 18-20 */
+	"VIDEOTEXSTRING", "IA5STRING", "UTCTIME" "GENERALIZEDTIME", /* 21-24 */
+	"GRAPHICSTRING", "VISIBLESTRING", "GENERALSTRING",	    /* 25-27 */
+	"UNIVERSALSTRING", "<ASN1 29>", "BMPSTRING"		    /* 28-30 */
+	};
+
+	if((tag == V_ASN1_NEG_INTEGER) || (tag == V_ASN1_NEG_ENUMERATED))
+							tag &= ~0x100;
+
+	if(tag < 0 || tag > 30) return "(unknown)";
+	return tag2str[tag];
+}
+