Fix BIT STRING

8 files changed, 303 insertions, 103 deletions

diff --git a/lib/asn1/src/asn1ct_constructed_per.erl b/lib/asn1/src/asn1ct_constructed_per.erl
index c224f4c9fa..f2509d1324 100644
--- a/lib/asn1/src/asn1ct_constructed_per.erl
+++ b/lib/asn1/src/asn1ct_constructed_per.erl
@@ -906,26 +906,36 @@ def_values(#type{def=#'Externaltypereference'{module=Mod,type=Type}}, Def) ->
     #typedef{typespec=T} = asn1_db:dbget(Mod, Type),
     def_values(T, Def);
 def_values(#type{def={'BIT STRING',[]}}, Bs) when is_bitstring(Bs) ->
-    ListBs = [B || <<B:1>> <= Bs],
-    IntBs = lists:foldl(fun(B, A) ->
-				(A bsl 1) bor B
-			end, 0, lists:reverse(ListBs)),
-    Sz = bit_size(Bs),
-    Compact = case 8 - Sz rem 8 of
-		  8 ->
-		      {0,Bs};
-		  Unused ->
-		      {Unused,<<Bs:Sz/bits,0:Unused>>}
-	      end,
-    [asn1_DEFAULT,Bs,Compact,ListBs,IntBs];
+    case asn1ct:use_legacy_types() of
+	false ->
+	    [asn1_DEFAULT,Bs];
+	true ->
+	    ListBs = [B || <<B:1>> <= Bs],
+	    IntBs = lists:foldl(fun(B, A) ->
+					(A bsl 1) bor B
+				end, 0, lists:reverse(ListBs)),
+	    Sz = bit_size(Bs),
+	    Compact = case 8 - Sz rem 8 of
+			  8 ->
+			      {0,Bs};
+			  Unused ->
+			      {Unused,<<Bs:Sz/bits,0:Unused>>}
+		      end,
+	    [asn1_DEFAULT,Bs,Compact,ListBs,IntBs]
+    end;
 def_values(#type{def={'BIT STRING',[_|_]=Ns}}, List) when is_list(List) ->
     Bs = asn1ct_gen:named_bitstring_value(List, Ns),
-    ListBs = [B || <<B:1>> <= Bs],
-    IntBs = lists:foldl(fun(B, A) ->
-				(A bsl 1) bor B
-			end, 0, lists:reverse(ListBs)),
-    Args = [List,Bs,ListBs,IntBs],
-    {call,per_common,is_default_bitstring,Args};
+    As = case asn1ct:use_legacy_types() of
+	     false ->
+		 [List,Bs];
+	     true ->
+		 ListBs = [B || <<B:1>> <= Bs],
+		 IntBs = lists:foldl(fun(B, A) ->
+					     (A bsl 1) bor B
+				     end, 0, lists:reverse(ListBs)),
+		 [List,Bs,ListBs,IntBs]
+	 end,
+    {call,per_common,is_default_bitstring,As};
 def_values(#type{def={'INTEGER',Ns}}, Def) ->
     [asn1_DEFAULT,Def|case lists:keyfind(Def, 2, Ns) of
 			  false -> [];
diff --git a/lib/asn1/src/asn1ct_gen_ber_bin_v2.erl b/lib/asn1/src/asn1ct_gen_ber_bin_v2.erl
index de81259fcb..84cda4491b 100644
--- a/lib/asn1/src/asn1ct_gen_ber_bin_v2.erl
+++ b/lib/asn1/src/asn1ct_gen_ber_bin_v2.erl
@@ -206,10 +206,32 @@ gen_encode_prim(_Erules, #type{}=D, DoTag, Value) ->
 		  {call,ber,encode_tags,
 		   [DoTag,{curr,realval},{curr,realsize}]},nl,
 		  "end"]);
+	{'BIT STRING',[]} ->
+	    case asn1ct:use_legacy_types() of
+		false when BitStringConstraint =:= [] ->
+		    call(encode_unnamed_bit_string, [Value,DoTag]);
+		false ->
+		    call(encode_unnamed_bit_string,
+			 [{asis,BitStringConstraint},Value,DoTag]);
+		true ->
+		    call(encode_bit_string,
+			 [{asis,BitStringConstraint},Value,
+			  {asis,[]},DoTag])
+	    end;
 	{'BIT STRING',NamedNumberList} ->
-	    call(encode_bit_string,
-		 [{asis,BitStringConstraint},Value,
-		  {asis,NamedNumberList},DoTag]);
+	    case asn1ct:use_legacy_types() of
+		false when BitStringConstraint =:= [] ->
+		    call(encode_named_bit_string,
+			 [Value,{asis,NamedNumberList},DoTag]);
+		false ->
+		    call(encode_named_bit_string,
+			 [{asis,BitStringConstraint},Value,
+			  {asis,NamedNumberList},DoTag]);
+		true ->
+		    call(encode_bit_string,
+			 [{asis,BitStringConstraint},Value,
+			  {asis,NamedNumberList},DoTag])
+	    end;
 	'NULL' ->
 	    call(encode_null, [Value,DoTag]);
 	'OBJECT IDENTIFIER' ->
diff --git a/lib/asn1/src/asn1ct_gen_per.erl b/lib/asn1/src/asn1ct_gen_per.erl
index 7ba649c874..1885f782bd 100644
--- a/lib/asn1/src/asn1ct_gen_per.erl
+++ b/lib/asn1/src/asn1ct_gen_per.erl
@@ -132,7 +132,14 @@ gen_encode_prim_imm(Val, #type{def=Type0,constraint=Constraint}, Aligned) ->
 	    ToBinary = {real_common,encode_real},
 	    asn1ct_imm:per_enc_restricted_string(Val, ToBinary, Aligned);
 	{'BIT STRING',NNL} ->
-	    asn1ct_imm:per_enc_bit_string(Val, NNL, Constraint, Aligned);
+	    case asn1ct:use_legacy_types() of
+		false ->
+		    asn1ct_imm:per_enc_bit_string(Val, NNL,
+						  Constraint, Aligned);
+		true ->
+		    asn1ct_imm:per_enc_legacy_bit_string(Val, NNL,
+							 Constraint, Aligned)
+	    end;
 	'NULL' ->
 	    asn1ct_imm:per_enc_null(Val, Aligned);
 	'OBJECT IDENTIFIER' ->
diff --git a/lib/asn1/src/asn1ct_imm.erl b/lib/asn1/src/asn1ct_imm.erl
index c14f0b889f..9da8658f19 100644
--- a/lib/asn1/src/asn1ct_imm.erl
+++ b/lib/asn1/src/asn1ct_imm.erl
@@ -26,7 +26,8 @@
 	 per_dec_octet_string/2,per_dec_open_type/1,per_dec_real/1,
 	 per_dec_restricted_string/1]).
 -export([per_dec_constrained/3,per_dec_normally_small_number/1]).
--export([per_enc_bit_string/4,per_enc_boolean/2,
+-export([per_enc_bit_string/4,per_enc_legacy_bit_string/4,
+	 per_enc_boolean/2,
 	 per_enc_choice/3,per_enc_enumerated/3,
 	 per_enc_integer/3,per_enc_integer/4,
 	 per_enc_null/2,
@@ -157,7 +158,35 @@ per_dec_restricted_string(Aligned) ->
 %%% Encoding.
 %%%
 
-per_enc_bit_string(Val0, [], Constraint0, Aligned) ->
+per_enc_bit_string(Val, [], Constraint0, Aligned) ->
+    {B,[[],Bits]} = mk_vars([], [bits]),
+    Constraint = effective_constraint(bitstring, Constraint0),
+    B ++ [{call,erlang,bit_size,[Val],Bits}|
+	  per_enc_length(Val, 1, Bits, Constraint, Aligned, 'BIT STRING')];
+per_enc_bit_string(Val0, NNL0, Constraint0, Aligned) ->
+    {B,[Val,Bs,Bits,Positions]} = mk_vars(Val0, [bs,bits,positions]),
+    NNL = lists:keysort(2, NNL0),
+    Constraint = effective_constraint(bitstring, Constraint0),
+    ExtraArgs = case constr_min_size(Constraint) of
+		    no -> [];
+		    Lb -> [Lb]
+		end,
+    ToBs = case ExtraArgs of
+	       [] ->
+		   {call,per_common,bs_drop_trailing_zeroes,[Val]};
+	       [Lower] ->
+		   {call,per_common,adjust_trailing_zeroes,[Val,Lower]}
+	   end,
+    B ++ [{'try',
+	   [bit_string_name2pos_fun(NNL, Val)],
+	   {Positions,
+	    [{call,per_common,bitstring_from_positions,
+	      [Positions|ExtraArgs]}]},
+	   [ToBs],Bs},
+	  {call,erlang,bit_size,[Bs],Bits}|
+	  per_enc_length(Bs, 1, Bits, Constraint, Aligned, 'BIT STRING')].
+
+per_enc_legacy_bit_string(Val0, [], Constraint0, Aligned) ->
     {B,[Val,Bs,Bits]} = mk_vars(Val0, [bs,bits]),
     Constraint = effective_constraint(bitstring, Constraint0),
     ExtraArgs = case constr_min_size(Constraint) of
@@ -167,7 +196,7 @@ per_enc_bit_string(Val0, [], Constraint0, Aligned) ->
     B ++ [{call,per_common,to_bitstring,[Val|ExtraArgs],Bs},
 	  {call,erlang,bit_size,[Bs],Bits}|
 	  per_enc_length(Bs, 1, Bits, Constraint, Aligned, 'BIT STRING')];
-per_enc_bit_string(Val0, NNL0, Constraint0, Aligned) ->
+per_enc_legacy_bit_string(Val0, NNL0, Constraint0, Aligned) ->
     {B,[Val,Bs,Bits,Positions]} = mk_vars(Val0, [bs,bits,positions]),
     NNL = lists:keysort(2, NNL0),
     Constraint = effective_constraint(bitstring, Constraint0),
diff --git a/lib/asn1/src/asn1rtt_ber.erl b/lib/asn1/src/asn1rtt_ber.erl
index 583ff790b7..a4aa347aea 100644
--- a/lib/asn1/src/asn1rtt_ber.erl
+++ b/lib/asn1/src/asn1rtt_ber.erl
@@ -29,6 +29,8 @@
 	 decode_integer/2,decode_integer/3,
 	 decode_named_integer/3,decode_named_integer/4,
 	 encode_enumerated/2,decode_enumerated/3,
+	 encode_unnamed_bit_string/2,encode_unnamed_bit_string/3,
+	 encode_named_bit_string/3,encode_named_bit_string/4,
 	 encode_bit_string/4,
 	 decode_named_bit_string/3,
 	 decode_compact_bit_string/3,
@@ -780,6 +782,55 @@ decode_enumerated1(Val, NamedNumberList) ->
 	    {asn1_enum,Val}
     end.
 
+%%============================================================================
+%% Bitstring value, ITU_T X.690 Chapter 8.6
+%%
+%% encode bitstring value
+%%============================================================================
+
+encode_unnamed_bit_string(Bits, TagIn) ->
+    Unused = (8 - (bit_size(Bits) band 7)) band 7,
+    Bin = <<Unused,Bits/bitstring,0:Unused>>,
+    encode_tags(TagIn, Bin, byte_size(Bin)).
+
+encode_unnamed_bit_string(C, Bits, TagIn) ->
+    NumBits = bit_size(Bits),
+    Unused = (8 - (NumBits band 7)) band 7,
+    Bin = <<Unused,Bits/bitstring,0:Unused>>,
+    case C of
+	{_Min,Max} ->
+	    if
+		NumBits > Max ->
+		    exit({error,{asn1,
+				 {bitstring_length,
+				  {{was,NumBits},{maximum,Max}}}}});
+		true ->
+		    ok
+	    end;
+	Size ->
+	    if NumBits =< Size ->
+		    ok;
+	       true ->
+		    exit({error,{asn1,
+				 {bitstring_length,
+				  {{was,NumBits},{should_be,Size}}}}})
+	    end
+    end,
+    encode_tags(TagIn, Bin, byte_size(Bin)).
+
+encode_named_bit_string([H|_]=Bits, NamedBitList, TagIn) when is_atom(H) ->
+    encode_bit_string_named([], Bits, NamedBitList, TagIn);
+encode_named_bit_string([{bit,_}|_]=Bits, NamedBitList, TagIn) ->
+    encode_bit_string_named([], Bits, NamedBitList, TagIn);
+encode_named_bit_string(Bits, _NamedBitList, TagIn) when is_bitstring(Bits) ->
+    encode_unnamed_bit_string(Bits, TagIn).
+
+encode_named_bit_string(C, [H|_]=Bits, NamedBitList, TagIn) when is_atom(H) ->
+    encode_bit_string_named(C, Bits, NamedBitList, TagIn);
+encode_named_bit_string(C, [{bit,_}|_]=Bits, NamedBitList, TagIn) ->
+    encode_bit_string_named(C, Bits, NamedBitList, TagIn);
+encode_named_bit_string(C, Bits, _NamedBitList, TagIn) when is_bitstring(Bits) ->
+    encode_unnamed_bit_string(C, Bits, TagIn).
 
 %%============================================================================
 %% Bitstring value, ITU_T X.690 Chapter 8.6
diff --git a/lib/asn1/src/asn1rtt_per_common.erl b/lib/asn1/src/asn1rtt_per_common.erl
index 3309e6a4ca..e84fa581df 100644
--- a/lib/asn1/src/asn1rtt_per_common.erl
+++ b/lib/asn1/src/asn1rtt_per_common.erl
@@ -37,7 +37,8 @@
 	 bitstring_from_positions/1,bitstring_from_positions/2,
 	 to_bitstring/1,to_bitstring/2,
 	 to_named_bitstring/1,to_named_bitstring/2,
-	 is_default_bitstring/5,
+	 bs_drop_trailing_zeroes/1,adjust_trailing_zeroes/2,
+	 is_default_bitstring/3,is_default_bitstring/5,
 	 extension_bitmap/3]).
 
 -define('16K',16384).
@@ -272,6 +273,25 @@ to_named_bitstring(Val, Lb) ->
     %% for correctness, not speed.
     adjust_trailing_zeroes(to_bitstring(Val), Lb).
 
+is_default_bitstring(asn1_DEFAULT, _, _) ->
+    true;
+is_default_bitstring(Named, Named, _) ->
+    true;
+is_default_bitstring(Bs, _, Bs) ->
+    true;
+is_default_bitstring(Val, _, Def) when is_bitstring(Val) ->
+    Sz = bit_size(Def),
+    case Val of
+	<<Def:Sz/bitstring,T/bitstring>> ->
+	    NumZeroes = bit_size(T),
+	    case T of
+		<<0:NumZeroes>> -> true;
+		_ -> false
+	    end;
+	_ ->
+	    false
+    end.
+
 is_default_bitstring(asn1_DEFAULT, _, _, _, _) ->
     true;
 is_default_bitstring({Unused,Bin}, V0, V1, V2, V3) when is_integer(Unused) ->
@@ -438,6 +458,8 @@ adjust_trailing_zeroes(Bs0, Lb) ->
 bs_drop_trailing_zeroes(Bs) ->
     bs_drop_trailing_zeroes(Bs, bit_size(Bs)).
 
+bs_drop_trailing_zeroes(Bs, 0) ->
+    Bs;
 bs_drop_trailing_zeroes(Bs0, Sz0) when Sz0 < 8 ->
     <<Byte:Sz0>> = Bs0,
     Sz = Sz0 - ntz(Byte),
diff --git a/lib/asn1/test/asn1_SUITE.erl b/lib/asn1/test/asn1_SUITE.erl
index 2809c8020b..ac61187ed4 100644
--- a/lib/asn1/test/asn1_SUITE.erl
+++ b/lib/asn1/test/asn1_SUITE.erl
@@ -328,6 +328,10 @@ testCompactBitString(Config, Rule, Opts) ->
 testPrimStrings(Config) ->
     test(Config, fun testPrimStrings/3, [ber,{ber,[der]},per,uper]).
 testPrimStrings(Config, Rule, Opts) ->
+    LegacyOpts = [legacy_erlang_types|Opts],
+    asn1_test_lib:compile_all(["PrimStrings", "BitStr"], Config,
+			      [Rule|LegacyOpts]),
+    testPrimStrings_cases(Rule, LegacyOpts),
     asn1_test_lib:compile_all(["PrimStrings", "BitStr"], Config, [Rule|Opts]),
     testPrimStrings_cases(Rule, Opts),
     asn1_test_lib:compile_all(["PrimStrings", "BitStr"], Config,
@@ -432,7 +436,8 @@ testDef(Config, Rule, Opts) ->
 testDEFAULT(Config) ->
     test(Config, fun testDEFAULT/3, [ber,{ber,[der]},per,uper]).
 testDEFAULT(Config, Rule, Opts) ->
-    asn1_test_lib:compile_all(["Def","Default"], Config, [Rule|Opts]),
+    asn1_test_lib:compile_all(["Def","Default"], Config,
+			      [legacy_erlang_types,Rule|Opts]),
     testDef:main(Rule),
     testSeqSetDefaultVal:main(Rule, Opts).
 
@@ -784,7 +789,8 @@ testMergeCompile(Config, Rule, Opts) ->
 
 testobj(Config) -> test(Config, fun testobj/3).
 testobj(Config, Rule, Opts) ->
-    asn1_test_lib:compile("RANAP", Config, [Rule|Opts]),
+    asn1_test_lib:compile("RANAP", Config, [legacy_erlang_types,
+					    Rule|Opts]),
     asn1_test_lib:compile_erlang("testobj", Config, []),
     ok = testobj:run(),
     ok = testParameterizedInfObj:ranap(Rule).
@@ -1022,7 +1028,8 @@ test_x691(Config, Rule, Opts) ->
     test_x691:cases(Rule),
 
     %% OTP-7708.
-    asn1_test_lib:compile("EUTRA-extract-55", Config, [Rule|Opts]),
+    asn1_test_lib:compile("EUTRA-extract-55", Config,
+			  [legacy_erlang_types,Rule|Opts]),
 
     %% OTP-7763.
     Val = {'Seq',15,lists:duplicate(8, 0),[0],lists:duplicate(28, 0),15,true},
@@ -1200,8 +1207,8 @@ ticket_7407_code(FinalPadding) ->
 
 eutra1(msg) ->
     {'BCCH-BCH-Message',
-     {'MasterInformationBlock',[0,1,0,1],[1,0,1,0],
-      {'PHICH-Configuration',short,ffs},[1,0,1,0,0,0,0,0]}}.
+     {'MasterInformationBlock',<<2#0101:4>>,<<2#1010:4>>,
+      {'PHICH-Configuration',short,ffs},<<2#10100000>>}}.
 
 eutra1(result, true) ->
     <<90,80,0>>;
diff --git a/lib/asn1/test/testPrimStrings.erl b/lib/asn1/test/testPrimStrings.erl
index f8e48be4ae..2e133e184a 100644
--- a/lib/asn1/test/testPrimStrings.erl
+++ b/lib/asn1/test/testPrimStrings.erl
@@ -68,33 +68,37 @@ bit_string(Rules, Opts) ->
     %% Bs1 ::= BIT STRING
     %%==========================================================
 
-    bs_roundtrip('Bs1', 0, <<>>),
-    bs_roundtrip('Bs1', 4, <<1:3>>),
-    bs_roundtrip('Bs1', 15, <<15:4>>),
-    bs_roundtrip('Bs1', 255, <<255:8>>),
-
-    bs_roundtrip('Bs1', 256, [0,0,0,0,0,0,0,0,1]),
-    bs_roundtrip('Bs1', 257, [1,0,0,0,0,0,0,0,1]),
-    bs_roundtrip('Bs1', 444, [0,0,1,1,1,1,0,1,1]),
-    
-    {ok,Enc1} = 'PrimStrings':encode('Bs1', 12345678901234567890),
-    {ok,_} = 'PrimStrings':decode('Bs1', Enc1),
-
-    bs_roundtrip('Bs1', [1,1,1,1,1,1,1,1]),
-    bs_roundtrip('Bs1', [0,1,0,0,1,0]),
-    bs_roundtrip('Bs1', [1,0,0,0,0,0,0,0,0]),
-    bs_roundtrip('Bs1', [0,1,0,0,1,0,1,1,1,1,1,0,0,0,1,0,0,1,1]),
+    bs_roundtrip('Bs1', <<>>),
+    bs_roundtrip('Bs1', <<1:3>>),
+    bs_roundtrip('Bs1', <<15:4>>),
+    bs_roundtrip('Bs1', <<2#010010:6>>),
+    bs_roundtrip('Bs1', <<2#11111111:8>>),
+    bs_roundtrip('Bs1', <<2#100000000:9>>),
+    bs_roundtrip('Bs1', <<2#100000001:9>>),
+    bs_roundtrip('Bs1', <<2#001111011:9>>),
+    bs_roundtrip('Bs1', <<2#0100101111100010011:19>>),
+
+    case 'PrimStrings':legacy_erlang_types() of
+	false ->
+	    ok;
+	true ->
+	    {ok,Enc1} = 'PrimStrings':encode('Bs1', 12345678901234567890),
+	    {ok,_} = 'PrimStrings':decode('Bs1', Enc1)
+    end,
 
 
     case {Rules,Opts} of
-	{ber,[]} ->
+	{ber,[legacy_erlang_types]} ->
 	    bs_decode('Bs1', <<35,8,3,2,0,73,3,2,4,32>>,
 		      [0,1,0,0,1,0,0,1,0,0,1,0]),
 	    bs_decode('Bs1', <<35,9,3,2,0,234,3,3,7,156,0>>,
 		      [1,1,1,0,1,0,1,0,1,0,0,1,1,1,0,0,0]),
 	    bs_decode('Bs1', <<35,128,3,2,0,234,3,3,7,156,0,0,0>>,
 		      [1,1,1,0,1,0,1,0,1,0,0,1,1,1,0,0,0]);
-	_ ->
+	{ber,[]} ->
+	    %% XXX
+	    ok;
+	{_,_} ->
 	    %% DER, PER, UPER
 	    consistent_def_enc('BsDef1',
 			       [2#111101,
@@ -114,30 +118,39 @@ bit_string(Rules, Opts) ->
     %%==========================================================
     
     roundtrip('Bs2', [mo,tu,fr]),
-    roundtrip('Bs2', [0,1,1,0,0,1,0], [mo,tu,fr]),
+    bs_roundtrip('Bs2', <<2#0110010:7>>, [mo,tu,fr]),
+    bs_roundtrip('Bs2', <<2#0110011:7>>, [mo,tu,fr,sa]),
 
     %%==========================================================
     %% Bs3 ::= BIT STRING {su(0), mo(1), tu(2), we(3), th(4), fr(5), sa(6) } (SIZE (1..7))
     %%==========================================================
     
     roundtrip('Bs3', [mo,tu,fr]),
-    bs_roundtrip('Bs3', [0,1,1,0,0,1,0], [mo,tu,fr]),
+    bs_roundtrip('Bs3', <<2#0110010:7>>, [mo,tu,fr]),
+    bs_roundtrip('Bs3', <<2#0110010:7>>, [mo,tu,fr]),
+    bs_roundtrip('Bs2', <<2#0110011:7>>, [mo,tu,fr,sa]),
+    bs_roundtrip('Bs3', <<2#011001:6>>, [mo,tu,fr]),
+    bs_roundtrip('Bs3', <<2#11:2>>, [su,mo]),
 
     %%==========================================================
     %% Bs7 ::= BIT STRING (SIZE (24))
     %%==========================================================
 
-    bs_roundtrip('Bs7', 53245,
-		 [1,0,1,1,1,1,1,1,1,1,1,1,0,0,1,1,0,0,0,0,0,0,0,0]),
-    bs_roundtrip('Bs7', [1,0,1,0],
-		 [1,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]),
+    bs_roundtrip('Bs7', <<23563:24>>),
+    case 'PrimStrings':legacy_erlang_types() of
+	false ->
+%%	    {error,_} = 'PrimStrings':encode('Bs7', <<2#1010:4>>);
+	    ok;
+	true ->
+	    ok
+    end,
     
     %%==========================================================
     %% BsPri ::= [PRIVATE 61] BIT STRING
     %%==========================================================
     
-    bs_roundtrip('BsPri', 45, [1,0,1,1,0,1]),
-    bs_roundtrip('BsPri', 211, [1,1,0,0,1,0,1,1]),
+    bs_roundtrip('BsPri', <<2#101101:6>>),
+    bs_roundtrip('BsPri', <<2#11001011:8>>),
     
     case Rules of
 	ber ->
@@ -158,8 +171,8 @@ bit_string(Rules, Opts) ->
     %% BsExpPri ::= [PRIVATE 61] EXPLICIT BIT STRING
     %%==========================================================
     
-    bs_roundtrip('BsExpPri', 45, [1,0,1,1,0,1]),
-    bs_roundtrip('BsExpPri', 211, [1,1,0,0,1,0,1,1]),
+    bs_roundtrip('BsExpPri', <<2#101101:6>>),
+    bs_roundtrip('BsExpPri', <<2#11001011:8>>),
     
     case Rules of
 	ber ->
@@ -180,14 +193,14 @@ bit_string(Rules, Opts) ->
     %%    veteran(2), collegeGraduate(3)}, test case for OTP-5710
     %%==========================================================
     
-    {ok,Bytes54} = 'BitStr':encode('PersonalStatus', []),
+    {ok,Bytes54} = 'BitStr':encode('PersonalStatus', <<>>),
     {ok,[]} = 'BitStr':decode('PersonalStatus', Bytes54),
     
     %%==========================================================
     %% BS5932 ::= BIT STRING (SIZE (5..MAX))
     %% test case for OTP-5932
     %%==========================================================
-    bs_roundtrip('BSMAX', [1,0,1,0,1]),
+    bs_roundtrip('BSMAX', <<2#10101:5>>),
     case Rules of
 	ber ->
 	    {error,_} = 'PrimStrings':encode('BSMAX', [1,0,1]);
@@ -201,28 +214,35 @@ bit_string(Rules, Opts) ->
     %% BS1024 ::= BIT STRING (SIZE (1024))
     %% test case for OTP-7602
     %%==========================================================
-    BSmaker =
-	fun(_F,S,S,_,Acc) -> 
-		Acc;
-	   (F,Ix,S,{A,B},Acc) -> 
-		F(F,Ix+1,S,{B,A},[A|Acc]) 
-	end,
-    
-    BSList255 = BSmaker(BSmaker,0,255,{1,0},[]),
-    bs_roundtrip('BS255', BSList255),
-    BSList256 = BSmaker(BSmaker,0,256,{1,0},[]),
-    bs_roundtrip('BS256', BSList256),
-    BSList1024 = BSmaker(BSmaker,0,1024,{1,0},[]),
-    bs_roundtrip('BS1024', BSList1024),
 
-    bs_roundtrip('TransportLayerAddress', [0,1,1,0]),
+    bs_roundtrip('BS255', random_bits(255)),
+    bs_roundtrip('BS256', random_bits(256)),
+    bs_roundtrip('BS1024', random_bits(1024)),
+
+    bs_roundtrip('TransportLayerAddress', <<2#0110:4>>),
 
     case Rules of
 	ber -> ok;
 	_ -> per_bs_strings()
     end.
 
-consistent_def_enc(Type, Vs) ->
+random_bits(N) ->
+    Seed = integer_to_list(erlang:phash2(erlang:now())),
+    random_bits(<<>>, N, Seed).
+
+random_bits(Bin, N, Seed) ->
+    RandomBits = erlang:md5(Seed),
+    Bits = bit_size(RandomBits),
+    if
+	Bits < N ->
+	    random_bits(<<Bin/bitstring,RandomBits/bitstring>>,
+			N-Bits, RandomBits);
+	true ->
+	    <<LastBits:N/bitstring,_/bitstring>> = RandomBits,
+	    <<Bin/bitstring,LastBits/bitstring>>
+    end.
+
+consistent_def_enc(Type, Vs0) ->
     M = 'PrimStrings',
     {ok,Enc} = M:encode(Type, {Type,asn1_DEFAULT}),
     {ok,Val} = M:decode(Type, Enc),
@@ -235,6 +255,13 @@ consistent_def_enc(Type, Vs) ->
 	{legacy,{_,Bs}} when is_list(Bs) -> ok
     end,
 
+    %% If this is not the legacy format, only bitstrings are
+    %% allowed.
+    Vs = case M:legacy_erlang_types() of
+	     false -> [V || V <- Vs0, is_bitstring(V)];
+	     true -> Vs0
+	 end,
+
     %% All values should be recognized and encoded as the
     %% the default value (i.e. not encoded at all).
     _ = [{ok,Enc} = M:encode(Type, {Type,V}) || V <- Vs],
@@ -246,18 +273,9 @@ consistent_def_enc(Type, Vs) ->
 %% a SIZE constraint).
 
 per_bs_strings() ->
-    bs_roundtrip('Bs3', [0,0,1,0,0,0,0], [tu]),
     bs_roundtrip('Bs3', <<2#0010000:7>>, [tu]),
-    bs_roundtrip('Bs3', {1,<<2#00100000:8>>}, [tu]),
-
-    bs_roundtrip('Bs4', [0,1,1,0,0,1,0], [mo,tu,fr]),
     bs_roundtrip('Bs4', <<2#0110010:7>>, [mo,tu,fr]),
-    bs_roundtrip('Bs4', {1,<<2#01100100:8>>}, [mo,tu,fr]),
-
-    bs_roundtrip('Bs4', [0,1,1,0,0,0,0], [mo,tu]),
     bs_roundtrip('Bs4', <<2#011:3,0:32>>, [mo,tu]),
-    bs_roundtrip('Bs4', {5,<<2#011:3,0:32,0:5>>}, [mo,tu]),
-
     [per_trailing_zeroes(B) || B <- lists:seq(0, 255)],
     ok.
 
@@ -273,10 +291,6 @@ per_trailing_zeroes(Byte) ->
 		     {bit,LastBitPos} -> LastBitPos+1
 		 end,
 
-    %% List of zeroes and ones.
-    named_roundtrip(L, Pos, ExpectedSz),
-    named_roundtrip(L++[0,0,0,0,0], Pos, ExpectedSz),
-
     %% Bitstrings.
     Bs = << <<B:1>> || B <- L >>,
     Sz = bit_size(Bs),
@@ -284,14 +298,22 @@ per_trailing_zeroes(Byte) ->
     Bin = <<Bs:Sz/bits,0:16,0:7>>,
     named_roundtrip(Bin, Pos, ExpectedSz),
 
-    %% Compact bitstring.
-    named_roundtrip({7,Bin}, Pos, ExpectedSz),
+    case 'PrimStrings':legacy_erlang_types() of
+	false ->
+	    ok;
+	true ->
+	    %% List of zeroes and ones.
+	    named_roundtrip(L, Pos, ExpectedSz),
+	    named_roundtrip(L++[0,0,0,0,0], Pos, ExpectedSz),
 
-    %% Integer bitstring (obsolete).
-    IntBs = intlist_to_integer(L, 0, 0),
-    named_roundtrip(IntBs, Pos, ExpectedSz),
+	    %% Compact bitstring.
+	    named_roundtrip({7,Bin}, Pos, ExpectedSz),
 
-    ok.
+	    %% Integer bitstring (obsolete).
+	    IntBs = intlist_to_integer(L, 0, 0),
+	    named_roundtrip(IntBs, Pos, ExpectedSz),
+	    ok
+    end.
 
 make_bit_list(0) -> [];
 make_bit_list(B) -> [B band 1|make_bit_list(B bsr 1)].
@@ -753,15 +775,45 @@ roundtrip(Type, Value, Expected) ->
 bs_roundtrip(Type, Value) ->
     bs_roundtrip(Type, Value, Value).
 
-bs_roundtrip(Type, Value, Expected) ->
+bs_roundtrip(Type, Value, Expected) when is_bitstring(Value) ->
     M = 'PrimStrings',
-    {ok,Encoded} = M:encode(Type, Value),
-    {ok,Encoded} = M:encode(Type, Expected),
-    case M:decode(Type, Encoded) of
-	{ok,Expected} ->
-	    ok;
-	{ok,Other} ->
-	    Expected = convert(Other, Expected)
+    case M:legacy_erlang_types() of
+	false ->
+	    asn1_test_lib:roundtrip(M, Type, Value, Expected);
+	true ->
+	    {ok,Encoded} = M:encode(Type, Value),
+	    BitList = [B || <<B:1>> <= Value],
+	    {ok,Encoded} = M:encode(Type, BitList),
+	    case BitList of
+		[] ->
+		    {ok,Encoded} = M:encode(Type, 0);
+		[_|_] ->
+		    case lists:last(BitList) of
+			1 ->
+			    Int = lists:foldr(fun(B, A) ->
+						      (A bsl 1) bor B
+					      end, 0, BitList),
+			    {ok,Encoded} = M:encode(Type, Int);
+			0 ->
+			    %% This BIT STRING cannot be represented
+			    %% as an integer.
+			    ok
+		    end
+	    end,
+	    Compact = case bit_size(Value) of
+			  Bits when Bits rem 8 =:= 0 ->
+			      {0,Value};
+			  Bits ->
+			      Unused = 8 - Bits rem 8,
+			      {Unused,<<Value:Bits/bitstring,0:Unused>>}
+		      end,
+	    {ok,Encoded} = M:encode(Type, Compact),
+	    case M:decode(Type, Encoded) of
+		{ok,Expected} ->
+		    ok;
+		{ok,Other} ->
+		    Expected = convert(Other, Expected)
+	    end
     end.
 
 bs_decode(Type, Encoded, Expected) ->