5 files changed, 36 insertions, 18 deletions
diff --git a/lib/compiler/src/compile.erl b/lib/compiler/src/compile.erl
index 745f1d5cf9..2ca403de54 100644
--- a/lib/compiler/src/compile.erl
+++ b/lib/compiler/src/compile.erl
@@ -1197,9 +1197,9 @@ abstract_code(#compile{code=Code,options=Opts,ofile=OFile}) ->
 
 encrypt_abs_code(Abstr, Key0) ->
     try
-	{Mode,RealKey} = generate_key(Key0),
+	RealKey = generate_key(Key0),
 	case start_crypto() of
-	    ok -> {ok,encrypt(Mode, RealKey, Abstr)};
+	    ok -> {ok,encrypt(RealKey, Abstr)};
 	    {error,_}=E -> E
 	end
     catch
@@ -1216,19 +1216,19 @@ start_crypto() ->
 	    {error,[{none,?MODULE,no_crypto}]}
     end.
 
-generate_key({Mode,String}) when is_atom(Mode), is_list(String) ->
-    {Mode,beam_lib:make_crypto_key(Mode, String)};
+generate_key({Type,String}) when is_atom(Type), is_list(String) ->
+    beam_lib:make_crypto_key(Type, String);
 generate_key(String) when is_list(String) ->
     generate_key({des3_cbc,String}).
 
-encrypt(des3_cbc=Mode, {K1,K2,K3, IVec}, Bin0) ->
-    Bin1 = case byte_size(Bin0) rem 8 of
+encrypt({des3_cbc=Type,Key,IVec,BlockSize}, Bin0) ->
+    Bin1 = case byte_size(Bin0) rem BlockSize of
 	       0 -> Bin0;
-	       N -> list_to_binary([Bin0,random_bytes(8-N)])
+	       N -> list_to_binary([Bin0,random_bytes(BlockSize-N)])
 	   end,
-    Bin = crypto:des3_cbc_encrypt(K1, K2, K3, IVec, Bin1),
-    ModeString = atom_to_list(Mode),
-    list_to_binary([0,length(ModeString),ModeString,Bin]).
+    Bin = crypto:block_encrypt(Type, Key, IVec, Bin1),
+    TypeString = atom_to_list(Type),
+    list_to_binary([0,length(TypeString),TypeString,Bin]).
 
 random_bytes(N) ->
     {A,B,C} = now(),
diff --git a/lib/compiler/test/compile_SUITE.erl b/lib/compiler/test/compile_SUITE.erl
index 229e5a98a1..c635d13c89 100644
--- a/lib/compiler/test/compile_SUITE.erl
+++ b/lib/compiler/test/compile_SUITE.erl
@@ -492,6 +492,16 @@ encrypted_abstr_1(Simple, Target) ->
     ?line {error,beam_lib,{key_missing_or_invalid,"simple.beam",abstract_code}} =
 	beam_lib:chunks("simple.beam", [abstract_code]),
     ?line ok = file:set_cwd(OldCwd),
+
+    %% Test key compatibility by reading a BEAM file produced before
+    %% the update to the new crypto functions.
+    install_crypto_key("an old key"),
+    KeyCompat = filename:join(filename:dirname(Simple),
+			      "key_compatibility"),
+    {ok,{key_compatibility,[Chunk]}} = beam_lib:chunks(KeyCompat,
+						       [abstract_code]),
+    {abstract_code,{raw_abstract_v1,_}} = Chunk,
+
     ok.
 
 
diff --git a/lib/compiler/test/compile_SUITE_data/key_compatibility.beam b/lib/compiler/test/compile_SUITE_data/key_compatibility.beam
new file mode 100644
index 0000000000..28329d2423
--- /dev/null
+++ b/lib/compiler/test/compile_SUITE_data/key_compatibility.beam
diff --git a/lib/compiler/test/compile_SUITE_data/key_compatibility.erl b/lib/compiler/test/compile_SUITE_data/key_compatibility.erl
new file mode 100644
index 0000000000..e2931f1b12
--- /dev/null
+++ b/lib/compiler/test/compile_SUITE_data/key_compatibility.erl
@@ -0,0 +1,8 @@
+-module(key_compatibility).
+-export([main/0]).
+
+%% Compile like this:
+%%  erlc +'{debug_info_key,"an old key"}' key_compatibility.erl
+
+main() ->
+    ok.
diff --git a/lib/stdlib/src/beam_lib.erl b/lib/stdlib/src/beam_lib.erl
index fe7e0f8e60..2e9ebece0e 100644
--- a/lib/stdlib/src/beam_lib.erl
+++ b/lib/stdlib/src/beam_lib.erl
@@ -302,10 +302,10 @@ clear_crypto_key_fun() ->
 -spec make_crypto_key(mode(), string()) ->
         {binary(), binary(), binary(), binary()}.
 
-make_crypto_key(des3_cbc, String) ->
+make_crypto_key(des3_cbc=Type, String) ->
     <<K1:8/binary,K2:8/binary>> = First = erlang:md5(String),
     <<K3:8/binary,IVec:8/binary>> = erlang:md5([First|reverse(String)]),
-    {K1,K2,K3,IVec}.
+    {Type,[K1,K2,K3],IVec,8}.
 
 %%
 %%  Local functions
@@ -864,20 +864,20 @@ mandatory_chunks() ->
 
 -define(CRYPTO_KEY_SERVER, beam_lib__crypto_key_server).
 
-decrypt_abst(Mode, Module, File, Id, AtomTable, Bin) ->
+decrypt_abst(Type, Module, File, Id, AtomTable, Bin) ->
     try
-	KeyString = get_crypto_key({debug_info, Mode, Module, File}),
-	Key = make_crypto_key(des3_cbc, KeyString),
-	Term = decrypt_abst_1(Mode, Key, Bin),
+	KeyString = get_crypto_key({debug_info, Type, Module, File}),
+	Key = make_crypto_key(Type, KeyString),
+	Term = decrypt_abst_1(Key, Bin),
 	{AtomTable, {Id, Term}}
     catch
 	_:_ ->
 	    error({key_missing_or_invalid, File, Id})
     end.
 
-decrypt_abst_1(des3_cbc, {K1, K2, K3, IVec}, Bin) ->
+decrypt_abst_1({Type,Key,IVec,_BlockSize}, Bin) ->
     ok = start_crypto(),
-    NewBin = crypto:des3_cbc_decrypt(K1, K2, K3, IVec, Bin),
+    NewBin = crypto:block_decrypt(Type, Key, IVec, Bin),
     binary_to_term(NewBin).
 
 start_crypto() ->