Add ASN.1 ADB callback.

Add support for application supplied any defined by callback. An
application can change the selector value if it wishes. This is
mainly intended for values which are only known at runtime, for
example dynamically created OIDs.

Reviewed-by: Rich Salz <rsalz@openssl.org>

diff --git a/crypto/asn1/tasn_utl.c b/crypto/asn1/tasn_utl.c
index 51f22aa7c6fa502faaf710efa0db782b452cf749..c840047cdf6576fcf380374ded078591b56e5e54 100644 (file)
--- a/crypto/asn1/tasn_utl.c
+++ b/crypto/asn1/tasn_utl.c
@@ -243,6 +243,12 @@ const ASN1_TEMPLATE *asn1_do_adb(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt,
     else
         selector = ASN1_INTEGER_get((ASN1_INTEGER *)*sfld);
 
+    /* Let application callback translate value */
+    if (adb->adb_cb != NULL && adb->adb_cb(&selector) == 0) {
+        ASN1err(ASN1_F_ASN1_DO_ADB, ASN1_R_UNSUPPORTED_ANY_DEFINED_BY_TYPE);
+        return NULL;
+    }
+
     /*
      * Try to find matching entry in table Maybe should check application
      * types first to allow application override? Might also be useful to

diff --git a/include/openssl/asn1t.h b/include/openssl/asn1t.h
index 46fd086e24ea0f26e3b0b8c83516906953079674..1a17ee95fb91140f2ad1aef73496463af458539b 100644 (file)
--- a/include/openssl/asn1t.h
+++ b/include/openssl/asn1t.h
@@ -463,12 +463,12 @@ extern "C" {
 
 # ifndef OPENSSL_EXPORT_VAR_AS_FUNCTION
 
-#  define ASN1_ADB_END(name, flags, field, app_table, def, none) \
+#  define ASN1_ADB_END(name, flags, field, adb_cb, def, none) \
         ;\
         static const ASN1_ADB name##_adb = {\
                 flags,\
                 offsetof(name, field),\
-                app_table,\
+                adb_cb,\
                 name##_adbtbl,\
                 sizeof(name##_adbtbl) / sizeof(ASN1_ADB_TABLE),\
                 def,\
@@ -477,7 +477,7 @@ extern "C" {
 
 # else
 
-#  define ASN1_ADB_END(name, flags, field, app_table, def, none) \
+#  define ASN1_ADB_END(name, flags, field, adb_cb, def, none) \
         ;\
         static const ASN1_ITEM *name##_adb(void) \
         { \
@@ -485,7 +485,7 @@ extern "C" {
                 {\
                 flags,\
                 offsetof(name, field),\
-                app_table,\
+                adb_cb,\
                 name##_adbtbl,\
                 sizeof(name##_adbtbl) / sizeof(ASN1_ADB_TABLE),\
                 def,\
@@ -529,7 +529,7 @@ typedef struct ASN1_ADB_st ASN1_ADB;
 struct ASN1_ADB_st {
     unsigned long flags;        /* Various flags */
     unsigned long offset;       /* Offset of selector field */
-    STACK_OF(ASN1_ADB_TABLE) **app_items; /* Application defined items */
+    int (*adb_cb)(long *psel);  /* Application callback */
     const ASN1_ADB_TABLE *tbl;  /* Table of possible types */
     long tblcount;              /* Number of entries in tbl */
     const ASN1_TEMPLATE *default_tt; /* Type to use if no match */