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authorBjörn Gustavsson <bjorn@erlang.org>2016-01-21 15:04:26 +0100
committerBjörn Gustavsson <bjorn@erlang.org>2016-01-21 16:19:56 +0100
commitc6dcb32548ee0bb4cf5db7ef01593668358cf8b6 (patch)
tree7783a65529d2c3bda6649a018beb4da5f3773b86 /lib/asn1
parent931b51693132839c3bc0edc3ed01364135293c1b (diff)
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PER: Correct compilation of named INTEGERs
When a constrained INTEGER has more than 16536 values and named values, the compiler would crash when compiling to the PER format. Example: Longitude ::= INTEGER { oneMicrodegreeEast(10), oneMicrodegreeWest(-10), unavailable(1800000001) } (-1799999999..1800000001) Reported-by: Ingars
Diffstat (limited to 'lib/asn1')
-rw-r--r--lib/asn1/src/asn1ct_imm.erl33
-rw-r--r--lib/asn1/test/asn1_SUITE_data/Prim.asn17
-rw-r--r--lib/asn1/test/testPrim.erl29
3 files changed, 54 insertions, 15 deletions
diff --git a/lib/asn1/src/asn1ct_imm.erl b/lib/asn1/src/asn1ct_imm.erl
index 527f4f0ba9..e09256cde9 100644
--- a/lib/asn1/src/asn1ct_imm.erl
+++ b/lib/asn1/src/asn1ct_imm.erl
@@ -1120,38 +1120,41 @@ per_enc_constrained(Val0, Lb, Ub, false) ->
per_enc_constrained(Val0, Lb, Ub, true) ->
{Prefix,Val} = sub_lb(Val0, Lb),
Range = Ub - Lb + 1,
+ Check = {ult,Val,Range},
if
Range < 256 ->
NumBits = per_num_bits(Range),
- Check = {ult,Val,Range},
Put = [{put_bits,Val,NumBits,[1]}],
{Prefix,Check,Put};
Range =:= 256 ->
NumBits = 8,
- Check = {ult,Val,Range},
Put = [{put_bits,Val,NumBits,[1,align]}],
{Prefix,Check,Put};
Range =< 65536 ->
- Check = {ult,Val,Range},
Put = [{put_bits,Val,16,[1,align]}],
{Prefix,Check,Put};
true ->
- {var,VarBase} = Val,
- Bin = {var,VarBase++"@bin"},
- BinSize0 = {var,VarBase++"@bin_size0"},
- BinSize = {var,VarBase++"@bin_size"},
- Check = {ult,Val,Range},
RangeOctsLen = byte_size(binary:encode_unsigned(Range - 1)),
BitsNeeded = per_num_bits(RangeOctsLen),
- Enc = [{call,binary,encode_unsigned,[Val],Bin},
- {call,erlang,byte_size,[Bin],BinSize0},
- {sub,BinSize0,1,BinSize},
- {'cond',[['_',
- {put_bits,BinSize,BitsNeeded,[1]},
- {put_bits,Bin,binary,[8,align]}]]}],
- {Prefix,Check,Enc}
+ {Prefix,Check,per_enc_constrained_huge(BitsNeeded, Val)}
end.
+per_enc_constrained_huge(BitsNeeded, {var,VarBase}=Val) ->
+ Bin = {var,VarBase++"@bin"},
+ BinSize0 = {var,VarBase++"@bin_size0"},
+ BinSize = {var,VarBase++"@bin_size"},
+ [{call,binary,encode_unsigned,[Val],Bin},
+ {call,erlang,byte_size,[Bin],BinSize0},
+ {sub,BinSize0,1,BinSize},
+ {'cond',[['_',
+ {put_bits,BinSize,BitsNeeded,[1]},
+ {put_bits,Bin,binary,[8,align]}]]}];
+per_enc_constrained_huge(BitsNeeded, Val) when is_integer(Val) ->
+ Bin = binary:encode_unsigned(Val),
+ BinSize = erlang:byte_size(Bin),
+ [{put_bits,BinSize-1,BitsNeeded,[1]},
+ {put_bits,Val,8*BinSize,[1,align]}].
+
per_enc_unconstrained(Val, Aligned) ->
case Aligned of
false -> [];
diff --git a/lib/asn1/test/asn1_SUITE_data/Prim.asn1 b/lib/asn1/test/asn1_SUITE_data/Prim.asn1
index b4c011fd39..4fe0901683 100644
--- a/lib/asn1/test/asn1_SUITE_data/Prim.asn1
+++ b/lib/asn1/test/asn1_SUITE_data/Prim.asn1
@@ -60,4 +60,11 @@ BEGIN
e BOOLEAN,
magic INTEGER
}
+
+ Longitude ::= INTEGER {
+ oneMicrodegreeEast(10),
+ oneMicrodegreeWest(-10),
+ unavailable(1800000001)
+ } (-1799999999..1800000001)
+
END
diff --git a/lib/asn1/test/testPrim.erl b/lib/asn1/test/testPrim.erl
index 8fa9973ea5..dc2e0fa2e7 100644
--- a/lib/asn1/test/testPrim.erl
+++ b/lib/asn1/test/testPrim.erl
@@ -78,8 +78,37 @@ int(Rules) ->
roundtrip('ASeq', {'ASeq',false,250,true,200,true,199,true,77788}),
roundtrip('ASeq', {'ASeq',true,0,false,0,true,0,true,68789}),
+ %%==========================================================
+ %% Longitude ::= INTEGER {
+ %% oneMicrodegreeEast(10),
+ %% oneMicrodegreeWest(-10),
+ %% unavailable(1800000001)
+ %% } (-1799999999..1800000001)
+ %%==========================================================
+
+ Enc10 = encoding(Rules, oneMicrodegreeEast),
+ Enc10 = roundtrip('Longitude', oneMicrodegreeEast),
+ Enc10 = roundtrip('Longitude', 10, oneMicrodegreeEast),
+
+ Enc20 = encoding(Rules, oneMicrodegreeWest),
+ Enc20 = roundtrip('Longitude', oneMicrodegreeWest),
+ Enc20 = roundtrip('Longitude', -10, oneMicrodegreeWest),
+
+ Enc30 = roundtrip('Longitude', unavailable),
+ Enc30 = roundtrip('Longitude', 1800000001, unavailable),
+
ok.
+encoding(Rules, Type) ->
+ asn1_test_lib:hex_to_bin(encoding_1(Rules, Type)).
+
+encoding_1(ber, oneMicrodegreeEast) -> "02010A";
+encoding_1(per, oneMicrodegreeEast) -> "C06B49D2 09";
+encoding_1(uper, oneMicrodegreeEast) -> "6B49D209";
+
+encoding_1(ber, oneMicrodegreeWest) -> "0201F6";
+encoding_1(per, oneMicrodegreeWest) -> "C06B49D1 F5";
+encoding_1(uper, oneMicrodegreeWest) -> "6B49D1F5".
enum(Rules) ->