From c730d2fb0342523fa9014373b234b426bd9ca6f2 Mon Sep 17 00:00:00 2001 From: Seth Falcon Date: Tue, 18 Jan 2011 17:34:41 -0800 Subject: Improved support for RSA and DSA public keys This patch allows the public_key module to decode and encode RSA and DSA keys encoded using the SubjectPublicKeyInfo format. When pem_entry_encode is called on an RSA or DSA public key type, the key is wrapped in the SubjectPublicKeyInfo format. --- lib/public_key/doc/src/public_key.xml | 21 +++++++++++------ lib/public_key/include/public_key.hrl | 5 +++-- lib/public_key/src/pubkey_cert_records.erl | 16 +++++++++---- lib/public_key/src/pubkey_pem.erl | 25 +++++++++++++++++---- lib/public_key/src/public_key.erl | 24 ++++++++++++++++++++ lib/public_key/test/public_key_SUITE.erl | 26 ++++++++++++++++++++++ .../test/public_key_SUITE_data/dsa_pub.pem | 12 ++++++++++ .../test/public_key_SUITE_data/rsa_pub.pem | 4 ++++ .../test/public_key_SUITE_data/rsa_pub_key.pem | 4 ++++ 9 files changed, 120 insertions(+), 17 deletions(-) create mode 100644 lib/public_key/test/public_key_SUITE_data/dsa_pub.pem create mode 100644 lib/public_key/test/public_key_SUITE_data/rsa_pub.pem create mode 100644 lib/public_key/test/public_key_SUITE_data/rsa_pub_key.pem (limited to 'lib') diff --git a/lib/public_key/doc/src/public_key.xml b/lib/public_key/doc/src/public_key.xml index c72719fac4..91e058f74e 100644 --- a/lib/public_key/doc/src/public_key.xml +++ b/lib/public_key/doc/src/public_key.xml @@ -64,8 +64,8 @@

decrypt_der() = binary()

-

pki_asn1_type() = 'Certificate' | 'RSAPrivateKey'| - 'DSAPrivateKey' | 'DHParameter'

+

pki_asn1_type() = 'Certificate' | 'RSAPrivateKey'| 'RSAPublicKey' + 'DSAPrivateKey' | 'DSAPublicKey' | 'DHParameter' | 'SubjectPublicKeyInfo'

pem_entry () = {pki_asn1_type(), der_encoded() | decrypt_der(), not_encrypted | {"DES-CBC" | "DES-EDE3-CBC", crypto:rand_bytes(8)}}.

@@ -207,17 +207,24 @@ Password = string() -

Decodes a pem entry. pem_decode/1 returns a list of - pem entries.

+

Decodes a pem entry. pem_decode/1 returns a list of pem + entries. Note that if the pem entry is of type + 'SubjectPublickeyInfo' it will be further decoded to an + rsa_public_key() or dsa_public_key().

 pem_entry_encode(Asn1Type, Entity [,{CipherInfo, Password}]) -> pem_entry() - Creates a pem entry that can be feed to pem_encode/1. + Creates a pem entry that can be fed to pem_encode/1. - Asn1Type = atom() - Entity = term() + Asn1Type = pki_asn1_type() + Entity = term() - The Erlang representation of + Asn1Type. If Asn1Type is 'SubjectPublicKeyInfo' + then Entity must be either an rsa_public_key() or a + dsa_public_key() and this function will create the appropriate + 'SubjectPublicKeyInfo' entry. + CipherInfo = {"DES-CBC" | "DES-EDE3-CBC", crypto:rand_bytes(8)} Password = string() diff --git a/lib/public_key/include/public_key.hrl b/lib/public_key/include/public_key.hrl index 4950597fb5..f29ab859ed 100644 --- a/lib/public_key/include/public_key.hrl +++ b/lib/public_key/include/public_key.hrl @@ -73,8 +73,9 @@ -type der_encoded() :: binary(). -type decrypt_der() :: binary(). --type pki_asn1_type() :: 'Certificate' | 'RSAPrivateKey' - | 'DSAPrivateKey' | 'DHParameter'. +-type pki_asn1_type() :: 'Certificate' | 'RSAPrivateKey' | 'RSAPublicKey' + | 'DSAPrivateKey' | 'DSAPublicKey' | 'DHParameter' + | 'SubjectPublicKeyInfo'. -type pem_entry() :: {pki_asn1_type(), der_encoded() | decrypt_der(), not_encrypted | {Cipher :: string(), Salt :: binary()}}. -type asn1_type() :: atom(). %% see "OTP-PUB-KEY.hrl diff --git a/lib/public_key/src/pubkey_cert_records.erl b/lib/public_key/src/pubkey_cert_records.erl index 20b322b4a4..7a387e487c 100644 --- a/lib/public_key/src/pubkey_cert_records.erl +++ b/lib/public_key/src/pubkey_cert_records.erl @@ -23,7 +23,7 @@ -include("public_key.hrl"). --export([decode_cert/1, transform/2]). +-export([decode_cert/1, transform/2, supportedPublicKeyAlgorithms/1]). %%==================================================================== %% Internal application API @@ -80,16 +80,24 @@ transform(Other,_) -> Other. %%-------------------------------------------------------------------- -%%% Internal functions +-spec supportedPublicKeyAlgorithms(Oid::tuple()) -> asn1_type(). +%% +%% Description: Returns the public key type for an algorithm +%% identifier tuple as found in SubjectPublicKeyInfo. +%% %%-------------------------------------------------------------------- - -%%% SubjectPublicKey supportedPublicKeyAlgorithms(?'rsaEncryption') -> 'RSAPublicKey'; supportedPublicKeyAlgorithms(?'id-dsa') -> 'DSAPublicKey'; supportedPublicKeyAlgorithms(?'dhpublicnumber') -> 'DHPublicKey'; supportedPublicKeyAlgorithms(?'id-keyExchangeAlgorithm') -> 'KEA-PublicKey'; supportedPublicKeyAlgorithms(?'id-ecPublicKey') -> 'ECPoint'. +%%-------------------------------------------------------------------- +%%% Internal functions +%%-------------------------------------------------------------------- + +%%% SubjectPublicKey + decode_supportedPublicKey(#'OTPSubjectPublicKeyInfo'{algorithm= PA = #'PublicKeyAlgorithm'{algorithm=Algo}, subjectPublicKey = {0,SPK0}}) -> diff --git a/lib/public_key/src/pubkey_pem.erl b/lib/public_key/src/pubkey_pem.erl index 31d881973a..78870e5cd7 100644 --- a/lib/public_key/src/pubkey_pem.erl +++ b/lib/public_key/src/pubkey_pem.erl @@ -93,11 +93,11 @@ encode_pem_entries(Entries) -> encode_pem_entry({Asn1Type, Der, not_encrypted}) -> StartStr = pem_start(Asn1Type), - [StartStr, "\n", b64encode_and_split(Der), pem_end(StartStr) ,"\n\n"]; + [StartStr, "\n", b64encode_and_split(Der), "\n", pem_end(StartStr) ,"\n\n"]; encode_pem_entry({Asn1Type, Der, {Cipher, Salt}}) -> StartStr = pem_start(Asn1Type), [StartStr,"\n", pem_decrypt(),"\n", pem_decrypt_info(Cipher, Salt),"\n", - b64encode_and_split(Der), pem_end(StartStr) ,"\n\n"]. + b64encode_and_split(Der), "\n", pem_end(StartStr) ,"\n\n"]. decode_pem_entries([], Entries) -> lists:reverse(Entries); @@ -145,16 +145,22 @@ split_bin(N, Bin) -> b64encode_and_split(Bin) -> split_lines(base64:encode(Bin)). +split_lines(<>) -> + [Text]; split_lines(<>) -> [Text, $\n | split_lines(Rest)]; split_lines(Bin) -> - [Bin, $\n]. + [Bin]. %% Ignore white space at end of line join_entry([<<"-----END CERTIFICATE-----", _/binary>>| Lines], Entry) -> {lists:reverse(Entry), Lines}; join_entry([<<"-----END RSA PRIVATE KEY-----", _/binary>>| Lines], Entry) -> {lists:reverse(Entry), Lines}; +join_entry([<<"-----END PUBLIC KEY-----", _/binary>>| Lines], Entry) -> + {lists:reverse(Entry), Lines}; +join_entry([<<"-----END RSA PUBLIC KEY-----", _/binary>>| Lines], Entry) -> + {lists:reverse(Entry), Lines}; join_entry([<<"-----END DSA PRIVATE KEY-----", _/binary>>| Lines], Entry) -> {lists:reverse(Entry), Lines}; join_entry([<<"-----END DH PARAMETERS-----", _/binary>>| Lines], Entry) -> @@ -210,15 +216,22 @@ pem_start('Certificate') -> <<"-----BEGIN CERTIFICATE-----">>; pem_start('RSAPrivateKey') -> <<"-----BEGIN RSA PRIVATE KEY-----">>; +pem_start('RSAPublicKey') -> + <<"-----BEGIN RSA PUBLIC KEY-----">>; +pem_start('SubjectPublicKeyInfo') -> + <<"-----BEGIN PUBLIC KEY-----">>; pem_start('DSAPrivateKey') -> <<"-----BEGIN DSA PRIVATE KEY-----">>; pem_start('DHParameter') -> <<"-----BEGIN DH PARAMETERS-----">>. - pem_end(<<"-----BEGIN CERTIFICATE-----">>) -> <<"-----END CERTIFICATE-----">>; pem_end(<<"-----BEGIN RSA PRIVATE KEY-----">>) -> <<"-----END RSA PRIVATE KEY-----">>; +pem_end(<<"-----BEGIN RSA PUBLIC KEY-----">>) -> + <<"-----END RSA PUBLIC KEY-----">>; +pem_end(<<"-----BEGIN PUBLIC KEY-----">>) -> + <<"-----END PUBLIC KEY-----">>; pem_end(<<"-----BEGIN DSA PRIVATE KEY-----">>) -> <<"-----END DSA PRIVATE KEY-----">>; pem_end(<<"-----BEGIN DH PARAMETERS-----">>) -> @@ -230,6 +243,10 @@ asn1_type(<<"-----BEGIN CERTIFICATE-----">>) -> 'Certificate'; asn1_type(<<"-----BEGIN RSA PRIVATE KEY-----">>) -> 'RSAPrivateKey'; +asn1_type(<<"-----BEGIN RSA PUBLIC KEY-----">>) -> + 'RSAPublicKey'; +asn1_type(<<"-----BEGIN PUBLIC KEY-----">>) -> + 'SubjectPublicKeyInfo'; asn1_type(<<"-----BEGIN DSA PRIVATE KEY-----">>) -> 'DSAPrivateKey'; asn1_type(<<"-----BEGIN DH PARAMETERS-----">>) -> diff --git a/lib/public_key/src/public_key.erl b/lib/public_key/src/public_key.erl index 30398df9cc..fad73e8e92 100644 --- a/lib/public_key/src/public_key.erl +++ b/lib/public_key/src/public_key.erl @@ -62,6 +62,7 @@ -type dss_digest_type() :: 'none' | 'sha'. -define(UINT32(X), X:32/unsigned-big-integer). +-define(DER_NULL, <<5, 0>>). %%==================================================================== %% API @@ -90,6 +91,17 @@ pem_encode(PemEntries) when is_list(PemEntries) -> %% Description: Decodes a pem entry. pem_decode/1 returns a list of %% pem entries. %%-------------------------------------------------------------------- +pem_entry_decode({'SubjectPublicKeyInfo', Der, _}) -> + {_, {'AlgorithmIdentifier', AlgId, Params}, {0, Key0}} + = der_decode('SubjectPublicKeyInfo', Der), + KeyType = pubkey_cert_records:supportedPublicKeyAlgorithms(AlgId), + case KeyType of + 'RSAPublicKey' -> + der_decode(KeyType, Key0); + 'DSAPublicKey' -> + {params, DssParams} = der_decode('DSAParams', Params), + {der_decode(KeyType, Key0), DssParams} + end; pem_entry_decode({Asn1Type, Der, not_encrypted}) when is_atom(Asn1Type), is_binary(Der) -> der_decode(Asn1Type, Der). @@ -114,6 +126,18 @@ pem_entry_decode({Asn1Type, CryptDer, {Cipher, Salt}} = PemEntry, % %% Description: Creates a pem entry that can be feed to pem_encode/1. %%-------------------------------------------------------------------- +pem_entry_encode('SubjectPublicKeyInfo', Entity=#'RSAPublicKey'{}) -> + Der = der_encode('RSAPublicKey', Entity), + Spki = {'SubjectPublicKeyInfo', + {'AlgorithmIdentifier', ?'rsaEncryption', ?DER_NULL}, {0, Der}}, + pem_entry_encode('SubjectPublicKeyInfo', Spki); +pem_entry_encode('SubjectPublicKeyInfo', + {DsaInt, Params=#'Dss-Parms'{}}) when is_integer(DsaInt) -> + KeyDer = der_encode('DSAPublicKey', DsaInt), + ParamDer = der_encode('DSAParams', {params, Params}), + Spki = {'SubjectPublicKeyInfo', + {'AlgorithmIdentifier', ?'id-dsa', ParamDer}, {0, KeyDer}}, + pem_entry_encode('SubjectPublicKeyInfo', Spki); pem_entry_encode(Asn1Type, Entity) when is_atom(Asn1Type) -> Der = der_encode(Asn1Type, Entity), {Asn1Type, Der, not_encrypted}. diff --git a/lib/public_key/test/public_key_SUITE.erl b/lib/public_key/test/public_key_SUITE.erl index 1bc1c8ec75..e74ff8051d 100644 --- a/lib/public_key/test/public_key_SUITE.erl +++ b/lib/public_key/test/public_key_SUITE.erl @@ -139,6 +139,14 @@ pk_decode_encode(Config) when is_list(Config) -> DSAKey = public_key:der_decode('DSAPrivateKey', DerDSAKey), DSAKey = public_key:pem_entry_decode(Entry0), + + {ok, DSAPubPem} = file:read_file(filename:join(Datadir, "dsa_pub.pem")), + [{'SubjectPublicKeyInfo', _, _} = PubEntry0] = + public_key:pem_decode(DSAPubPem), + DSAPubKey = public_key:pem_entry_decode(PubEntry0), + true = check_entry_type(DSAPubKey, 'DSAPublicKey'), + PubEntry0 = public_key:pem_entry_encode('SubjectPublicKeyInfo', DSAPubKey), + DSAPubPem = public_key:pem_encode([PubEntry0]), [{'RSAPrivateKey', DerRSAKey, not_encrypted} = Entry1 ] = erl_make_certs:pem_to_der(filename:join(Datadir, "client_key.pem")), @@ -153,6 +161,20 @@ pk_decode_encode(Config) when is_list(Config) -> true = check_entry_type(public_key:pem_entry_decode(Entry2, "abcd1234"), 'RSAPrivateKey'), + {ok, RSAPubPem} = file:read_file(filename:join(Datadir, "rsa_pub.pem")), + [{'SubjectPublicKeyInfo', _, _} = PubEntry1] = + public_key:pem_decode(RSAPubPem), + RSAPubKey = public_key:pem_entry_decode(PubEntry1), + true = check_entry_type(RSAPubKey, 'RSAPublicKey'), + PubEntry1 = public_key:pem_entry_encode('SubjectPublicKeyInfo', RSAPubKey), + RSAPubPem = public_key:pem_encode([PubEntry1]), + + {ok, RSARawPem} = file:read_file(filename:join(Datadir, "rsa_pub_key.pem")), + [{'RSAPublicKey', _, _} = PubEntry2] = + public_key:pem_decode(RSARawPem), + RSAPubKey = public_key:pem_entry_decode(PubEntry2), + RSARawPem = public_key:pem_encode([PubEntry2]), + Salt0 = crypto:rand_bytes(8), Entry3 = public_key:pem_entry_encode('RSAPrivateKey', RSAKey0, {{"DES-EDE3-CBC", Salt0}, "1234abcd"}), @@ -432,6 +454,10 @@ check_entry_type(#'DSAPrivateKey'{}, 'DSAPrivateKey') -> true; check_entry_type(#'RSAPrivateKey'{}, 'RSAPrivateKey') -> true; +check_entry_type(#'RSAPublicKey'{}, 'RSAPublicKey') -> + true; +check_entry_type({_Int, #'Dss-Parms'{}}, 'DSAPublicKey') when is_integer(_Int) -> + true; check_entry_type(#'DHParameter'{}, 'DHParameter') -> true; check_entry_type(#'Certificate'{}, 'Certificate') -> diff --git a/lib/public_key/test/public_key_SUITE_data/dsa_pub.pem b/lib/public_key/test/public_key_SUITE_data/dsa_pub.pem new file mode 100644 index 0000000000..d3635e5b20 --- /dev/null +++ b/lib/public_key/test/public_key_SUITE_data/dsa_pub.pem @@ -0,0 +1,12 @@ +-----BEGIN PUBLIC KEY----- +MIIBtzCCASwGByqGSM44BAEwggEfAoGBALez5tklY5CdFeTMos899pA6i4u4uCts +zgBzrdBk6cl5FVqzdzWMGTQiynnTpGsrOESinzP06Ip+pG15We2OORwgvCxD/W95 +aCiN0/+MdiXqlsmboBARMzsa+SmBENN3gF/+tuuEAFzOXU1q2cmEywRLyfbM2KIB +VE/TChWYw2eRAhUA1R64VvcQ90XA8SOKVDmMA0dBzukCgYEAlLMYP0pbgBlgHQVO +3/avAHlWNrIq52Lxk7SdPJWgMvPjTK9Z6sv88kxsCcydtjvO439j1yqcwk50GQc+ +86ktBWWz93/HkIdnFyqafef4mmWvm2Uq6ClQKS+A0Asfaj8Mys+HUMiI+qsfdjRb +yIpwb7MX1nsVdsKzALnZNMW27A0DgYQAAoGAfEIAb3mLjtFfiF/tsZb4/DGHdWSb +6Ir0hFkoBUZ9ymBO70wlfZVSQGs240kZtOMpAOpJL1Dy8oH6PUQ+JyacwZIo8fdq +19/Kwm6CPrpaEhzErmMvwT2CZJYZ+HOk55ljLkVCiyG7MzEj2+odLKym9yoQsbsJ +olHzIRpkLk45y4c= +-----END PUBLIC KEY----- diff --git a/lib/public_key/test/public_key_SUITE_data/rsa_pub.pem b/lib/public_key/test/public_key_SUITE_data/rsa_pub.pem new file mode 100644 index 0000000000..cbe81343f7 --- /dev/null +++ b/lib/public_key/test/public_key_SUITE_data/rsa_pub.pem @@ -0,0 +1,4 @@ +-----BEGIN PUBLIC KEY----- +MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBANRiyZg0uci74Nc6mnqZ8AoDl88aT7x6 +JA0MfgHIHzteEj7Qg+lE5QxMGAafurVE5vqoHkDfwk4uzzsCAJuz91MCAwEAAQ== +-----END PUBLIC KEY----- diff --git a/lib/public_key/test/public_key_SUITE_data/rsa_pub_key.pem b/lib/public_key/test/public_key_SUITE_data/rsa_pub_key.pem new file mode 100644 index 0000000000..3b9d7568ff --- /dev/null +++ b/lib/public_key/test/public_key_SUITE_data/rsa_pub_key.pem @@ -0,0 +1,4 @@ +-----BEGIN RSA PUBLIC KEY----- +MEgCQQDUYsmYNLnIu+DXOpp6mfAKA5fPGk+8eiQNDH4ByB87XhI+0IPpROUMTBgG +n7q1ROb6qB5A38JOLs87AgCbs/dTAgMBAAE= +-----END RSA PUBLIC KEY----- -- cgit v1.2.3