Allocate string types directly.

Allocate and free ASN.1 string types directly instead of going through
the ASN.1 item code.

(Imported from upstream's 3d6aa6d441fe8124d247dffee5c68c2e5efd8258.)

Change-Id: I617283e67071a792f219ed08f19078afc223e2f5
Reviewed-on: https://boringssl-review.googlesource.com/4041
Reviewed-by: Adam Langley <agl@google.com>

crypto/asn1/tasn_typ.c

@@ -61,53 +61,38 @@
 
 /* Declarations for string types */
 
-IMPLEMENT_ASN1_TYPE(ASN1_INTEGER);
-IMPLEMENT_ASN1_FUNCTIONS(ASN1_INTEGER);
-
-IMPLEMENT_ASN1_TYPE(ASN1_ENUMERATED);
-IMPLEMENT_ASN1_FUNCTIONS(ASN1_ENUMERATED);
-
-IMPLEMENT_ASN1_TYPE(ASN1_BIT_STRING);
-IMPLEMENT_ASN1_FUNCTIONS(ASN1_BIT_STRING);
-
-IMPLEMENT_ASN1_TYPE(ASN1_OCTET_STRING);
-IMPLEMENT_ASN1_FUNCTIONS(ASN1_OCTET_STRING);
+#define IMPLEMENT_ASN1_STRING_FUNCTIONS(sname) \
+	IMPLEMENT_ASN1_TYPE(sname) \
+	IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(sname, sname, sname) \
+	sname *sname##_new(void) \
+	{ \
+		return ASN1_STRING_type_new(V_##sname); \
+	} \
+	void sname##_free(sname *x) \
+	{ \
+		ASN1_STRING_free(x); \
+	}
+
+IMPLEMENT_ASN1_STRING_FUNCTIONS(ASN1_OCTET_STRING)
+IMPLEMENT_ASN1_STRING_FUNCTIONS(ASN1_INTEGER)
+IMPLEMENT_ASN1_STRING_FUNCTIONS(ASN1_ENUMERATED)
+IMPLEMENT_ASN1_STRING_FUNCTIONS(ASN1_BIT_STRING)
+IMPLEMENT_ASN1_STRING_FUNCTIONS(ASN1_UTF8STRING)
+IMPLEMENT_ASN1_STRING_FUNCTIONS(ASN1_PRINTABLESTRING)
+IMPLEMENT_ASN1_STRING_FUNCTIONS(ASN1_T61STRING)
+IMPLEMENT_ASN1_STRING_FUNCTIONS(ASN1_IA5STRING)
+IMPLEMENT_ASN1_STRING_FUNCTIONS(ASN1_GENERALSTRING)
+IMPLEMENT_ASN1_STRING_FUNCTIONS(ASN1_UTCTIME)
+IMPLEMENT_ASN1_STRING_FUNCTIONS(ASN1_GENERALIZEDTIME)
+IMPLEMENT_ASN1_STRING_FUNCTIONS(ASN1_VISIBLESTRING)
+IMPLEMENT_ASN1_STRING_FUNCTIONS(ASN1_UNIVERSALSTRING)
+IMPLEMENT_ASN1_STRING_FUNCTIONS(ASN1_BMPSTRING)
 
 IMPLEMENT_ASN1_TYPE(ASN1_NULL);
 IMPLEMENT_ASN1_FUNCTIONS(ASN1_NULL);
 
 IMPLEMENT_ASN1_TYPE(ASN1_OBJECT);
 
-IMPLEMENT_ASN1_TYPE(ASN1_UTF8STRING);
-IMPLEMENT_ASN1_FUNCTIONS(ASN1_UTF8STRING);
-
-IMPLEMENT_ASN1_TYPE(ASN1_PRINTABLESTRING);
-IMPLEMENT_ASN1_FUNCTIONS(ASN1_PRINTABLESTRING);
-
-IMPLEMENT_ASN1_TYPE(ASN1_T61STRING);
-IMPLEMENT_ASN1_FUNCTIONS(ASN1_T61STRING);
-
-IMPLEMENT_ASN1_TYPE(ASN1_IA5STRING);
-IMPLEMENT_ASN1_FUNCTIONS(ASN1_IA5STRING);
-
-IMPLEMENT_ASN1_TYPE(ASN1_GENERALSTRING);
-IMPLEMENT_ASN1_FUNCTIONS(ASN1_GENERALSTRING);
-
-IMPLEMENT_ASN1_TYPE(ASN1_UTCTIME);
-IMPLEMENT_ASN1_FUNCTIONS(ASN1_UTCTIME);
-
-IMPLEMENT_ASN1_TYPE(ASN1_GENERALIZEDTIME);
-IMPLEMENT_ASN1_FUNCTIONS(ASN1_GENERALIZEDTIME);
-
-IMPLEMENT_ASN1_TYPE(ASN1_VISIBLESTRING);
-IMPLEMENT_ASN1_FUNCTIONS(ASN1_VISIBLESTRING);
-
-IMPLEMENT_ASN1_TYPE(ASN1_UNIVERSALSTRING);
-IMPLEMENT_ASN1_FUNCTIONS(ASN1_UNIVERSALSTRING);
-
-IMPLEMENT_ASN1_TYPE(ASN1_BMPSTRING);
-IMPLEMENT_ASN1_FUNCTIONS(ASN1_BMPSTRING);
-
 IMPLEMENT_ASN1_TYPE(ASN1_ANY);
 
 /* Just swallow an ASN1_SEQUENCE in an ASN1_STRING */;