Preliminary streaming ASN1 encode support.
[openssl.git] / crypto / asn1 / asn1t.h
index ed372f8..83e8213 100644 (file)
@@ -166,6 +166,9 @@ extern "C" {
                #stname \
        ASN1_ITEM_end(tname)
 
+#define ASN1_NDEF_SEQUENCE(tname) \
+       ASN1_SEQUENCE(tname)
+
 #define ASN1_SEQUENCE_cb(tname, cb) \
        const static ASN1_AUX tname##_aux = {NULL, 0, 0, 0, cb, 0}; \
        ASN1_SEQUENCE(tname)
@@ -182,6 +185,18 @@ extern "C" {
        const static ASN1_AUX tname##_aux = {NULL, ASN1_AFLG_ENCODING, 0, 0, cb, offsetof(tname, enc)}; \
        ASN1_SEQUENCE(tname)
 
+#define ASN1_NDEF_SEQUENCE_END(tname) \
+       ;\
+       ASN1_ITEM_start(tname) \
+               ASN1_ITYPE_NDEF_SEQUENCE,\
+               V_ASN1_SEQUENCE,\
+               tname##_seq_tt,\
+               sizeof(tname##_seq_tt) / sizeof(ASN1_TEMPLATE),\
+               NULL,\
+               sizeof(tname),\
+               #tname \
+       ASN1_ITEM_end(tname)
+
 #define ASN1_BROKEN_SEQUENCE_END(stname) ASN1_SEQUENCE_END_ref(stname, stname)
 
 #define ASN1_SEQUENCE_END_enc(stname, tname) ASN1_SEQUENCE_END_ref(stname, tname)
@@ -353,6 +368,10 @@ extern "C" {
 #define ASN1_EXP_SEQUENCE_OF_OPT(stname, field, type, tag) \
                        ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_SEQUENCE_OF|ASN1_TFLG_OPTIONAL)
 
+/* EXPLICIT OPTIONAL using indefinite length constructed form */
+#define ASN1_NDEF_EXP_OPT(stname, field, type, tag) \
+                       ASN1_EXP_EX(stname, field, type, tag, ASN1_TFLG_OPTIONAL|ASN1_TFLG_NDEF)
+
 /* Macros for the ASN1_ADB structure */
 
 #define ASN1_ADB(name) \
@@ -518,6 +537,13 @@ struct ASN1_ADB_TABLE_st {
 
 #define ASN1_TFLG_COMBINE      (0x1<<10)
 
+/* This flag when present in a SEQUENCE OF, SET OF
+ * or EXPLICIT causes indefinite length constructed
+ * encoding to be used if required.
+ */
+
+#define ASN1_TFLG_NDEF         (0x1<<11)
+
 /* This is the actual ASN1 item itself */
 
 struct ASN1_ITEM_st {
@@ -570,19 +596,25 @@ const char *sname;                /* Structure name */
  * has a special meaning, it is used as a mask
  * of acceptable types using the B_ASN1 constants.
  *
+ * NDEF_SEQUENCE is the same as SEQUENCE except
+ * that it will use indefinite length constructed
+ * encoding if requested.
+ *
  */
 
-#define ASN1_ITYPE_PRIMITIVE   0x0
+#define ASN1_ITYPE_PRIMITIVE           0x0
+
+#define ASN1_ITYPE_SEQUENCE            0x1
 
-#define ASN1_ITYPE_SEQUENCE    0x1
+#define ASN1_ITYPE_CHOICE              0x2
 
-#define ASN1_ITYPE_CHOICE      0x2
+#define ASN1_ITYPE_COMPAT              0x3
 
-#define ASN1_ITYPE_COMPAT      0x3
+#define ASN1_ITYPE_EXTERN              0x4
 
-#define ASN1_ITYPE_EXTERN      0x4
+#define ASN1_ITYPE_MSTRING             0x5
 
-#define ASN1_ITYPE_MSTRING     0x5
+#define ASN1_ITYPE_NDEF_SEQUENCE       0x6
 
 /* Cache for ASN1 tag and length, so we
  * don't keep re-reading it for things
@@ -767,6 +799,12 @@ typedef struct ASN1_AUX_st {
                return ASN1_item_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(itname));\
        } 
 
+#define IMPLEMENT_ASN1_NDEF_FUNCTION(stname) \
+       int i2d_##stname##_NDEF(stname *a, unsigned char **out) \
+       { \
+               return ASN1_item_ndef_i2d((ASN1_VALUE *)a, out, ASN1_ITEM_rptr(stname));\
+       } 
+
 /* This includes evil casts to remove const: they will go away when full
  * ASN1 constification is done.
  */