ssl & public_key: Workaround that some certificates encode countryname as utf8 and close down gracefully if other ASN-1 errors occur.

The reason certificate_unknown that is used as ALERT for ASN-1 encoding failure is described as:
      Some other (unspecified) issue arose in processing the
      certificate, rendering it unacceptable.

4 files changed, 71 insertions, 16 deletions

diff --git a/lib/public_key/asn1/OTP-PKIX.asn1 b/lib/public_key/asn1/OTP-PKIX.asn1
index fbf531df40..e94a77a3e7 100644
--- a/lib/public_key/asn1/OTP-PKIX.asn1
+++ b/lib/public_key/asn1/OTP-PKIX.asn1
@@ -225,7 +225,17 @@ dnQualifier ATTRIBUTE-TYPE-AND-VALUE-CLASS ::= {
 
 countryName ATTRIBUTE-TYPE-AND-VALUE-CLASS ::= {
 	ID id-at-countryName
-	TYPE X520countryName }
+        TYPE X520countryName } -- this is currently not used when decoding
+ -- The decoding and mapping between ID and Type is done in the code
+ -- in module publickey_cert_records via the function attribute_type
+ -- To be more forgiving and compatible with other SSL implementations
+ -- regarding how to handle and sometimes accept incorrect certificates
+ -- we define and use the type below instead of X520countryName
+
+ OTP-X520countryname ::= CHOICE {
+       printableString   PrintableString (SIZE (2)),
+       utf8String        UTF8String      (SIZE (2))
+}
 
 serialNumber ATTRIBUTE-TYPE-AND-VALUE-CLASS ::= {
 	ID id-at-serialNumber
diff --git a/lib/public_key/src/pubkey_cert_records.erl b/lib/public_key/src/pubkey_cert_records.erl
index b86d7a1f0c..33fe940ea2 100644
--- a/lib/public_key/src/pubkey_cert_records.erl
+++ b/lib/public_key/src/pubkey_cert_records.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 2008-2011. All Rights Reserved.
+%% Copyright Ericsson AB 2008-2012. All Rights Reserved.
 %%
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -57,6 +57,15 @@ transform(#'OTPTBSCertificate'{}= TBS, decode) ->
 transform(#'AttributeTypeAndValue'{type=Id,value=Value0} = ATAV, Func) ->
     {ok, Value} =
         case attribute_type(Id) of
+	    'X520countryName'when Func == decode ->
+		%% Workaround that some certificates break the ASN-1 spec
+		%% and encode countryname as utf8
+		case 'OTP-PUB-KEY':Func('OTP-X520countryname', Value0) of
+		    {ok, {utf8String, Utf8Value}} ->
+			{ok, unicode:characters_to_list(Utf8Value)};
+		    {ok, {printableString, ASCCI}} ->
+			{ok, ASCCI}
+		end;
             Type when is_atom(Type) -> 'OTP-PUB-KEY':Func(Type, Value0);
             _UnknownType            -> {ok, Value0}
         end,
diff --git a/lib/public_key/test/public_key_SUITE.erl b/lib/public_key/test/public_key_SUITE.erl
index a91dcfa029..6a879867e1 100644
--- a/lib/public_key/test/public_key_SUITE.erl
+++ b/lib/public_key/test/public_key_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 2008-2011. All Rights Reserved.
+%% Copyright Ericsson AB 2008-2012. All Rights Reserved.
 %%
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -107,7 +107,7 @@ all() ->
      {group, ssh_public_key_decode_encode},
      encrypt_decrypt,
      {group, sign_verify},
-     pkix, pkix_path_validation].
+     pkix, pkix_countryname, pkix_path_validation].
 
 groups() -> 
     [{pem_decode_encode, [], [dsa_pem, rsa_pem, encrypted_pem,
@@ -626,6 +626,34 @@ pkix(Config) when is_list(Config) ->
     VerifyStr = public_key:pkix_normalize_name(TestStr),
 
     ok.
+
+%%--------------------------------------------------------------------
+pkix_countryname(doc) ->
+    "Test workaround for certs that code x509countryname as utf8";
+pkix_countryname(suite) ->
+    [];
+pkix_countryname(Config) when is_list(Config) ->
+    Cert = incorrect_pkix_cert(),
+    OTPCert = public_key:pkix_decode_cert(Cert, otp),
+    TBSCert = OTPCert#'OTPCertificate'.tbsCertificate,
+    Issuer = TBSCert#'OTPTBSCertificate'.issuer,
+    Subj   = TBSCert#'OTPTBSCertificate'.subject,
+    check_countryname(Issuer),
+    check_countryname(Subj).
+
+check_countryname({rdnSequence,DirName}) ->
+    do_check_countryname(DirName).
+do_check_countryname([]) ->
+    ok;
+do_check_countryname([#'AttributeTypeAndValue'{type = ?'id-at-countryName',
+					       value = "US"}|_]) ->
+    ok;
+do_check_countryname([#'AttributeTypeAndValue'{type = ?'id-at-countryName',
+					       value =  Value}|_]) ->
+    test_server:fail({incorrect_cuntry_name, Value});
+do_check_countryname([_| Rest]) ->
+    do_check_countryname(Rest).
+
 %%--------------------------------------------------------------------
 pkix_path_validation(doc) ->
     "Misc pkix tests not covered elsewhere";
@@ -716,3 +744,6 @@ check_entry_type(_,_) ->
 
 strip_ending_newlines(Bin) ->
     string:strip(binary_to_list(Bin), right, 10).
+
+incorrect_pkix_cert() ->
+    <<48,130,5,186,48,130,4,162,160,3,2,1,2,2,7,7,250,61,63,6,140,137,48,13,6,9,42, 134,72,134,247,13,1,1,5,5,0,48,129,220,49,11,48,9,6,3,85,4,6,19,2,85,83,49, 16,48,14,6,3,85,4,8,19,7,65,114,105,122,111,110,97,49,19,48,17,6,3,85,4,7,19, 10,83,99,111,116,116,115,100,97,108,101,49,37,48,35,6,3,85,4,10,19,28,83,116, 97,114,102,105,101,108,100,32,84,101,99,104,110,111,108,111,103,105,101,115, 44,32,73,110,99,46,49,57,48,55,6,3,85,4,11,19,48,104,116,116,112,58,47,47,99, 101,114,116,105,102,105,99,97,116,101,115,46,115,116,97,114,102,105,101,108, 100,116,101,99,104,46,99,111,109,47,114,101,112,111,115,105,116,111,114,121, 49,49,48,47,6,3,85,4,3,19,40,83,116,97,114,102,105,101,108,100,32,83,101,99, 117,114,101,32,67,101,114,116,105,102,105,99,97,116,105,111,110,32,65,117, 116,104,111,114,105,116,121,49,17,48,15,6,3,85,4,5,19,8,49,48,54,56,56,52,51, 53,48,30,23,13,49,48,49,48,50,51,48,49,51,50,48,53,90,23,13,49,50,49,48,50, 51,48,49,51,50,48,53,90,48,122,49,11,48,9,6,3,85,4,6,12,2,85,83,49,11,48,9,6, 3,85,4,8,12,2,65,90,49,19,48,17,6,3,85,4,7,12,10,83,99,111,116,116,115,100, 97,108,101,49,38,48,36,6,3,85,4,10,12,29,83,112,101,99,105,97,108,32,68,111, 109,97,105,110,32,83,101,114,118,105,99,101,115,44,32,73,110,99,46,49,33,48, 31,6,3,85,4,3,12,24,42,46,108,111,103,105,110,46,115,101,99,117,114,101,115, 101,114,118,101,114,46,110,101,116,48,130,1,34,48,13,6,9,42,134,72,134,247, 13,1,1,1,5,0,3,130,1,15,0,48,130,1,10,2,130,1,1,0,185,136,240,80,141,36,124, 245,182,130,73,19,188,74,166,117,72,228,185,209,43,129,244,40,44,193,231,11, 209,12,234,88,43,142,1,162,48,122,17,95,230,105,171,131,12,147,46,204,36,80, 250,171,33,253,35,62,83,22,71,212,186,141,14,198,89,89,121,204,224,122,246, 127,110,188,229,162,67,95,6,74,231,127,99,131,7,240,85,102,203,251,50,58,58, 104,245,103,181,183,134,32,203,121,232,54,32,188,139,136,112,166,126,14,91, 223,153,172,164,14,61,38,163,208,215,186,210,136,213,143,70,147,173,109,217, 250,169,108,31,211,104,238,103,93,182,59,165,43,196,189,218,241,30,148,240, 109,90,69,176,194,52,116,173,151,135,239,10,209,179,129,192,102,75,11,25,168, 223,32,174,84,223,134,70,167,55,172,143,27,130,123,226,226,7,34,142,166,39, 48,246,96,231,150,84,220,106,133,193,55,95,159,227,24,249,64,36,1,142,171,16, 202,55,126,7,156,15,194,22,116,53,113,174,104,239,203,120,45,131,57,87,84, 163,184,27,83,57,199,91,200,34,43,98,61,180,144,76,65,170,177,2,3,1,0,1,163, 130,1,224,48,130,1,220,48,15,6,3,85,29,19,1,1,255,4,5,48,3,1,1,0,48,29,6,3, 85,29,37,4,22,48,20,6,8,43,6,1,5,5,7,3,1,6,8,43,6,1,5,5,7,3,2,48,14,6,3,85, 29,15,1,1,255,4,4,3,2,5,160,48,56,6,3,85,29,31,4,49,48,47,48,45,160,43,160, 41,134,39,104,116,116,112,58,47,47,99,114,108,46,115,116,97,114,102,105,101, 108,100,116,101,99,104,46,99,111,109,47,115,102,115,50,45,48,46,99,114,108, 48,83,6,3,85,29,32,4,76,48,74,48,72,6,11,96,134,72,1,134,253,110,1,7,23,2,48, 57,48,55,6,8,43,6,1,5,5,7,2,1,22,43,104,116,116,112,115,58,47,47,99,101,114, 116,115,46,115,116,97,114,102,105,101,108,100,116,101,99,104,46,99,111,109, 47,114,101,112,111,115,105,116,111,114,121,47,48,129,141,6,8,43,6,1,5,5,7,1, 1,4,129,128,48,126,48,42,6,8,43,6,1,5,5,7,48,1,134,30,104,116,116,112,58,47, 47,111,99,115,112,46,115,116,97,114,102,105,101,108,100,116,101,99,104,46,99, 111,109,47,48,80,6,8,43,6,1,5,5,7,48,2,134,68,104,116,116,112,58,47,47,99, 101,114,116,105,102,105,99,97,116,101,115,46,115,116,97,114,102,105,101,108, 100,116,101,99,104,46,99,111,109,47,114,101,112,111,115,105,116,111,114,121, 47,115,102,95,105,110,116,101,114,109,101,100,105,97,116,101,46,99,114,116, 48,31,6,3,85,29,35,4,24,48,22,128,20,73,75,82,39,209,27,188,242,161,33,106, 98,123,81,66,122,138,215,213,86,48,59,6,3,85,29,17,4,52,48,50,130,24,42,46, 108,111,103,105,110,46,115,101,99,117,114,101,115,101,114,118,101,114,46,110, 101,116,130,22,108,111,103,105,110,46,115,101,99,117,114,101,115,101,114,118, 101,114,46,110,101,116,48,29,6,3,85,29,14,4,22,4,20,138,233,191,208,157,203, 249,85,242,239,20,195,48,10,148,49,144,101,255,116,48,13,6,9,42,134,72,134, 247,13,1,1,5,5,0,3,130,1,1,0,82,31,121,162,49,50,143,26,167,202,143,61,71, 189,201,199,57,81,122,116,90,192,88,24,102,194,174,48,157,74,27,87,210,223, 253,93,3,91,150,109,120,1,110,27,11,200,198,141,222,246,14,200,71,105,41,138, 13,114,122,106,63,17,197,181,234,121,61,89,74,65,41,231,248,219,129,83,176, 219,55,107,55,211,112,98,38,49,69,77,96,221,108,123,152,12,210,159,157,141, 43,226,55,187,129,3,82,49,136,66,81,196,91,234,196,10,82,48,6,80,163,83,71, 127,102,177,93,209,129,26,104,2,84,24,255,248,161,3,244,169,234,92,122,110, 43,4,17,113,185,235,108,219,210,236,132,216,177,227,17,169,58,162,159,182, 162,93,160,229,200,9,163,229,110,121,240,168,232,14,91,214,188,196,109,210, 164,222,0,109,139,132,113,91,16,118,173,178,176,80,132,34,41,199,51,206,250, 224,132,60,115,192,94,107,163,219,212,226,225,65,169,148,108,213,46,174,173, 103,110,189,229,166,149,254,31,51,44,144,108,187,182,11,251,201,206,86,138, 208,59,51,86,132,235,81,225,88,34,190,8,184>>.
diff --git a/lib/ssl/src/ssl_handshake.erl b/lib/ssl/src/ssl_handshake.erl
index 28469dfa5f..bb26302fff 100644
--- a/lib/ssl/src/ssl_handshake.erl
+++ b/lib/ssl/src/ssl_handshake.erl
@@ -220,18 +220,23 @@ certify(#certificate{asn1_certificates = ASN1Certs}, CertDbHandle, CertDbRef,
 		 end, {Role, UserState0}}
 	end,
 
-    {TrustedErlCert, CertPath}  =
-	ssl_certificate:trusted_cert_and_path(ASN1Certs, CertDbHandle, CertDbRef),
-
-    case public_key:pkix_path_validation(TrustedErlCert,
-					 CertPath,
-					 [{max_path_length,
-					   MaxPathLen},
-					  {verify_fun, ValidationFunAndState}]) of
-	{ok, {PublicKeyInfo,_}} ->
-	    {PeerCert, PublicKeyInfo};
-	{error, Reason} ->
-	    path_validation_alert(Reason)
+    try
+	{TrustedErlCert, CertPath}  =
+	    ssl_certificate:trusted_cert_and_path(ASN1Certs, CertDbHandle, CertDbRef),
+	case public_key:pkix_path_validation(TrustedErlCert,
+					      CertPath,
+					     [{max_path_length,
+					       MaxPathLen},
+					      {verify_fun, ValidationFunAndState}]) of
+	    {ok, {PublicKeyInfo,_}} ->
+		{PeerCert, PublicKeyInfo};
+	    {error, Reason} ->
+		path_validation_alert(Reason)
+	end
+    catch
+	error:_ ->
+	    %% ASN-1 decode of certificate somehow failed
+	    ?ALERT_REC(?FATAL, ?CERTIFICATE_UNKNOWN)
     end.
 
 %%--------------------------------------------------------------------