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Diffstat (limited to 'src/erl_make_certs.erl')
| -rw-r--r-- | src/erl_make_certs.erl | 483 |
1 files changed, 0 insertions, 483 deletions
diff --git a/src/erl_make_certs.erl b/src/erl_make_certs.erl deleted file mode 100644 index 884230d..0000000 --- a/src/erl_make_certs.erl +++ /dev/null @@ -1,483 +0,0 @@ -%% -%% %CopyrightBegin% -%% -%% Copyright Ericsson AB 2011-2013. 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 -%% compliance with the License. You should have received a copy of the -%% Erlang Public License along with this software. If not, it can be -%% retrieved online at http://www.erlang.org/. -%% -%% Software distributed under the License is distributed on an "AS IS" -%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See -%% the License for the specific language governing rights and limitations -%% under the License. -%% -%% %CopyrightEnd% -%% - -%% Create test certificates - --module(erl_make_certs). --include_lib("public_key/include/public_key.hrl"). - --export([make_cert/1, gen_rsa/1, verify_signature/3, write_pem/3]). --export([gen_dsa/2, gen_ec/1]). - -%%-------------------------------------------------------------------- -%% @doc Create and return a der encoded certificate -%% Option Default -%% ------------------------------------------------------- -%% digest sha1 -%% validity {date(), date() + week()} -%% version 3 -%% subject [] list of the following content -%% {name, Name} -%% {email, Email} -%% {city, City} -%% {state, State} -%% {org, Org} -%% {org_unit, OrgUnit} -%% {country, Country} -%% {serial, Serial} -%% {title, Title} -%% {dnQualifer, DnQ} -%% issuer = {Issuer, IssuerKey} true (i.e. a ca cert is created) -%% (obs IssuerKey migth be {Key, Password} -%% key = KeyFile|KeyBin|rsa|dsa|ec Subject PublicKey rsa, dsa or ec generates key -%% -%% -%% (OBS: The generated keys are for testing only) -%% @spec ([{::atom(), ::term()}]) -> {Cert::binary(), Key::binary()} -%% @end -%%-------------------------------------------------------------------- - -make_cert(Opts) -> - SubjectPrivateKey = get_key(Opts), - {TBSCert, IssuerKey} = make_tbs(SubjectPrivateKey, Opts), - Cert = public_key:pkix_sign(TBSCert, IssuerKey), - true = verify_signature(Cert, IssuerKey, undef), %% verify that the keys where ok - {Cert, encode_key(SubjectPrivateKey)}. - -%%-------------------------------------------------------------------- -%% @doc Writes pem files in Dir with FileName ++ ".pem" and FileName ++ "_key.pem" -%% @spec (::string(), ::string(), {Cert,Key}) -> ok -%% @end -%%-------------------------------------------------------------------- -write_pem(Dir, FileName, {Cert, Key = {_,_,not_encrypted}}) when is_binary(Cert) -> - ok = der_to_pem(filename:join(Dir, FileName ++ ".pem"), - [{'Certificate', Cert, not_encrypted}]), - ok = der_to_pem(filename:join(Dir, FileName ++ "_key.pem"), [Key]). - -%%-------------------------------------------------------------------- -%% @doc Creates a rsa key (OBS: for testing only) -%% the size are in bytes -%% @spec (::integer()) -> {::atom(), ::binary(), ::opaque()} -%% @end -%%-------------------------------------------------------------------- -gen_rsa(Size) when is_integer(Size) -> - Key = gen_rsa2(Size), - {Key, encode_key(Key)}. - -%%-------------------------------------------------------------------- -%% @doc Creates a dsa key (OBS: for testing only) -%% the sizes are in bytes -%% @spec (::integer()) -> {::atom(), ::binary(), ::opaque()} -%% @end -%%-------------------------------------------------------------------- -gen_dsa(LSize,NSize) when is_integer(LSize), is_integer(NSize) -> - Key = gen_dsa2(LSize, NSize), - {Key, encode_key(Key)}. - -%%-------------------------------------------------------------------- -%% @doc Creates a ec key (OBS: for testing only) -%% the sizes are in bytes -%% @spec (::integer()) -> {::atom(), ::binary(), ::opaque()} -%% @end -%%-------------------------------------------------------------------- -gen_ec(Curve) when is_atom(Curve) -> - Key = gen_ec2(Curve), - {Key, encode_key(Key)}. - -%%-------------------------------------------------------------------- -%% @doc Verifies cert signatures -%% @spec (::binary(), ::tuple()) -> ::boolean() -%% @end -%%-------------------------------------------------------------------- -verify_signature(DerEncodedCert, DerKey, _KeyParams) -> - Key = decode_key(DerKey), - case Key of - #'RSAPrivateKey'{modulus=Mod, publicExponent=Exp} -> - public_key:pkix_verify(DerEncodedCert, - #'RSAPublicKey'{modulus=Mod, publicExponent=Exp}); - #'DSAPrivateKey'{p=P, q=Q, g=G, y=Y} -> - public_key:pkix_verify(DerEncodedCert, {Y, #'Dss-Parms'{p=P, q=Q, g=G}}); - #'ECPrivateKey'{version = _Version, privateKey = _PrivKey, - parameters = Params, publicKey = {0, PubKey}} -> - public_key:pkix_verify(DerEncodedCert, {#'ECPoint'{point = PubKey}, Params}) - end. - -%%%%%%%%%%%%%%%%%%%%%%%%% Implementation %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% - -get_key(Opts) -> - case proplists:get_value(key, Opts) of - undefined -> make_key(rsa, Opts); - rsa -> make_key(rsa, Opts); - dsa -> make_key(dsa, Opts); - ec -> make_key(ec, Opts); - Key -> - Password = proplists:get_value(password, Opts, no_passwd), - decode_key(Key, Password) - end. - -decode_key({Key, Pw}) -> - decode_key(Key, Pw); -decode_key(Key) -> - decode_key(Key, no_passwd). - - -decode_key(#'RSAPublicKey'{} = Key,_) -> - Key; -decode_key(#'RSAPrivateKey'{} = Key,_) -> - Key; -decode_key(#'DSAPrivateKey'{} = Key,_) -> - Key; -decode_key(#'ECPrivateKey'{} = Key,_) -> - Key; -decode_key(PemEntry = {_,_,_}, Pw) -> - public_key:pem_entry_decode(PemEntry, Pw); -decode_key(PemBin, Pw) -> - [KeyInfo] = public_key:pem_decode(PemBin), - decode_key(KeyInfo, Pw). - -encode_key(Key = #'RSAPrivateKey'{}) -> - {ok, Der} = 'OTP-PUB-KEY':encode('RSAPrivateKey', Key), - {'RSAPrivateKey', iolist_to_binary(Der), not_encrypted}; -encode_key(Key = #'DSAPrivateKey'{}) -> - {ok, Der} = 'OTP-PUB-KEY':encode('DSAPrivateKey', Key), - {'DSAPrivateKey', iolist_to_binary(Der), not_encrypted}; -encode_key(Key = #'ECPrivateKey'{}) -> - {ok, Der} = 'OTP-PUB-KEY':encode('ECPrivateKey', Key), - {'ECPrivateKey', iolist_to_binary(Der), not_encrypted}. - -make_tbs(SubjectKey, Opts) -> - Version = list_to_atom("v"++integer_to_list(proplists:get_value(version, Opts, 3))), - - IssuerProp = proplists:get_value(issuer, Opts, true), - {Issuer, IssuerKey} = issuer(IssuerProp, Opts, SubjectKey), - - {Algo, Parameters} = sign_algorithm(IssuerKey, Opts), - - SignAlgo = #'SignatureAlgorithm'{algorithm = Algo, - parameters = Parameters}, - Subject = case IssuerProp of - true -> %% Is a Root Ca - Issuer; - _ -> - subject(proplists:get_value(subject, Opts),false) - end, - - {#'OTPTBSCertificate'{serialNumber = trunc(rand:uniform()*100000000)*10000 + 1, - signature = SignAlgo, - issuer = Issuer, - validity = validity(Opts), - subject = Subject, - subjectPublicKeyInfo = publickey(SubjectKey), - version = Version, - extensions = extensions(Opts) - }, IssuerKey}. - -issuer(true, Opts, SubjectKey) -> - %% Self signed - {subject(proplists:get_value(subject, Opts), true), SubjectKey}; -issuer({Issuer, IssuerKey}, _Opts, _SubjectKey) when is_binary(Issuer) -> - {issuer_der(Issuer), decode_key(IssuerKey)}; -issuer({File, IssuerKey}, _Opts, _SubjectKey) when is_list(File) -> - [{'Certificate', Cert, _}|_] = pem_to_der(File), - {issuer_der(Cert), decode_key(IssuerKey)}. - -issuer_der(Issuer) -> - Decoded = public_key:pkix_decode_cert(Issuer, otp), - #'OTPCertificate'{tbsCertificate=Tbs} = Decoded, - #'OTPTBSCertificate'{subject=Subject} = Tbs, - Subject. - -subject(undefined, IsRootCA) -> - User = if IsRootCA -> "RootCA"; true -> user() end, - Opts = [{email, User ++ "@erlang.org"}, - {name, User}, - {city, "Stockholm"}, - {country, "SE"}, - {org, "erlang"}, - {org_unit, "testing dep"}], - subject(Opts); -subject(Opts, _) -> - subject(Opts). - -user() -> - case os:getenv("USER") of - false -> - "test_user"; - User -> - User - end. - -subject(SubjectOpts) when is_list(SubjectOpts) -> - Encode = fun(Opt) -> - {Type,Value} = subject_enc(Opt), - [#'AttributeTypeAndValue'{type=Type, value=Value}] - end, - {rdnSequence, [Encode(Opt) || Opt <- SubjectOpts]}. - -%% Fill in the blanks -subject_enc({name, Name}) -> {?'id-at-commonName', {printableString, Name}}; -subject_enc({email, Email}) -> {?'id-emailAddress', Email}; -subject_enc({city, City}) -> {?'id-at-localityName', {printableString, City}}; -subject_enc({state, State}) -> {?'id-at-stateOrProvinceName', {printableString, State}}; -subject_enc({org, Org}) -> {?'id-at-organizationName', {printableString, Org}}; -subject_enc({org_unit, OrgUnit}) -> {?'id-at-organizationalUnitName', {printableString, OrgUnit}}; -subject_enc({country, Country}) -> {?'id-at-countryName', Country}; -subject_enc({serial, Serial}) -> {?'id-at-serialNumber', Serial}; -subject_enc({title, Title}) -> {?'id-at-title', {printableString, Title}}; -subject_enc({dnQualifer, DnQ}) -> {?'id-at-dnQualifier', DnQ}; -subject_enc(Other) -> Other. - - -extensions(Opts) -> - case proplists:get_value(extensions, Opts, []) of - false -> - asn1_NOVALUE; - Exts -> - lists:flatten([extension(Ext) || Ext <- default_extensions(Exts)]) - end. - -default_extensions(Exts) -> - Def = [{key_usage,undefined}, - {subject_altname, undefined}, - {issuer_altname, undefined}, - {basic_constraints, default}, - {name_constraints, undefined}, - {policy_constraints, undefined}, - {ext_key_usage, undefined}, - {inhibit_any, undefined}, - {auth_key_id, undefined}, - {subject_key_id, undefined}, - {policy_mapping, undefined}], - Filter = fun({Key, _}, D) -> lists:keydelete(Key, 1, D) end, - Exts ++ lists:foldl(Filter, Def, Exts). - -extension({_, undefined}) -> []; -extension({basic_constraints, Data}) -> - case Data of - default -> - #'Extension'{extnID = ?'id-ce-basicConstraints', - extnValue = #'BasicConstraints'{cA=true}, - critical=true}; - false -> - []; - Len when is_integer(Len) -> - #'Extension'{extnID = ?'id-ce-basicConstraints', - extnValue = #'BasicConstraints'{cA=true, pathLenConstraint=Len}, - critical=true}; - _ -> - #'Extension'{extnID = ?'id-ce-basicConstraints', - extnValue = Data} - end; -extension({Id, Data, Critical}) -> - #'Extension'{extnID = Id, extnValue = Data, critical = Critical}. - - -publickey(#'RSAPrivateKey'{modulus=N, publicExponent=E}) -> - Public = #'RSAPublicKey'{modulus=N, publicExponent=E}, - Algo = #'PublicKeyAlgorithm'{algorithm= ?rsaEncryption, parameters='NULL'}, - #'OTPSubjectPublicKeyInfo'{algorithm = Algo, - subjectPublicKey = Public}; -publickey(#'DSAPrivateKey'{p=P, q=Q, g=G, y=Y}) -> - Algo = #'PublicKeyAlgorithm'{algorithm= ?'id-dsa', - parameters={params, #'Dss-Parms'{p=P, q=Q, g=G}}}, - #'OTPSubjectPublicKeyInfo'{algorithm = Algo, subjectPublicKey = Y}; -publickey(#'ECPrivateKey'{version = _Version, - privateKey = _PrivKey, - parameters = Params, - publicKey = {0, PubKey}}) -> - Algo = #'PublicKeyAlgorithm'{algorithm= ?'id-ecPublicKey', parameters=Params}, - #'OTPSubjectPublicKeyInfo'{algorithm = Algo, - subjectPublicKey = #'ECPoint'{point = PubKey}}. - -validity(Opts) -> - DefFrom0 = calendar:gregorian_days_to_date(calendar:date_to_gregorian_days(date())-1), - DefTo0 = calendar:gregorian_days_to_date(calendar:date_to_gregorian_days(date())+7), - {DefFrom, DefTo} = proplists:get_value(validity, Opts, {DefFrom0, DefTo0}), - Format = fun({Y,M,D}) -> lists:flatten(io_lib:format("~w~2..0w~2..0w000000Z",[Y,M,D])) end, - #'Validity'{notBefore={generalTime, Format(DefFrom)}, - notAfter ={generalTime, Format(DefTo)}}. - -sign_algorithm(#'RSAPrivateKey'{}, Opts) -> - Type = case proplists:get_value(digest, Opts, sha1) of - sha1 -> ?'sha1WithRSAEncryption'; - sha512 -> ?'sha512WithRSAEncryption'; - sha384 -> ?'sha384WithRSAEncryption'; - sha256 -> ?'sha256WithRSAEncryption'; - md5 -> ?'md5WithRSAEncryption'; - md2 -> ?'md2WithRSAEncryption' - end, - {Type, 'NULL'}; -sign_algorithm(#'DSAPrivateKey'{p=P, q=Q, g=G}, _Opts) -> - {?'id-dsa-with-sha1', {params,#'Dss-Parms'{p=P, q=Q, g=G}}}; -sign_algorithm(#'ECPrivateKey'{}, Opts) -> - Type = case proplists:get_value(digest, Opts, sha1) of - sha1 -> ?'ecdsa-with-SHA1'; - sha512 -> ?'ecdsa-with-SHA512'; - sha384 -> ?'ecdsa-with-SHA384'; - sha256 -> ?'ecdsa-with-SHA256' - end, - {Type, 'NULL'}. - -make_key(rsa, _Opts) -> - %% (OBS: for testing only) - gen_rsa2(64); -make_key(dsa, _Opts) -> - gen_dsa2(128, 20); %% Bytes i.e. {1024, 160} -make_key(ec, _Opts) -> - %% (OBS: for testing only) - gen_ec2(secp256k1). - -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -%% RSA key generation (OBS: for testing only) -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% - --define(SMALL_PRIMES, [65537,97,89,83,79,73,71,67,61,59,53, - 47,43,41,37,31,29,23,19,17,13,11,7,5,3]). - -gen_rsa2(Size) -> - P = prime(Size), - Q = prime(Size), - N = P*Q, - Tot = (P - 1) * (Q - 1), - [E|_] = lists:dropwhile(fun(Candidate) -> (Tot rem Candidate) == 0 end, ?SMALL_PRIMES), - {D1,D2} = extended_gcd(E, Tot), - D = erlang:max(D1,D2), - case D < E of - true -> - gen_rsa2(Size); - false -> - {Co1,Co2} = extended_gcd(Q, P), - Co = erlang:max(Co1,Co2), - #'RSAPrivateKey'{version = 'two-prime', - modulus = N, - publicExponent = E, - privateExponent = D, - prime1 = P, - prime2 = Q, - exponent1 = D rem (P-1), - exponent2 = D rem (Q-1), - coefficient = Co - } - end. - -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -%% DSA key generation (OBS: for testing only) -%% See http://en.wikipedia.org/wiki/Digital_Signature_Algorithm -%% and the fips_186-3.pdf -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -gen_dsa2(LSize, NSize) -> - Q = prime(NSize), %% Choose N-bit prime Q - X0 = prime(LSize), - P0 = prime((LSize div 2) +1), - - %% Choose L-bit prime modulus P such that p-1 is a multiple of q. - case dsa_search(X0 div (2*Q*P0), P0, Q, 1000) of - error -> - gen_dsa2(LSize, NSize); - P -> - G = crypto:mod_pow(2, (P-1) div Q, P), % Choose G a number whose multiplicative order modulo p is q. - %% such that This may be done by setting g = h^(p-1)/q mod p, commonly h=2 is used. - - X = prime(20), %% Choose x by some random method, where 0 < x < q. - Y = crypto:mod_pow(G, X, P), %% Calculate y = g^x mod p. - - #'DSAPrivateKey'{version=0, p = P, q = Q, - g = crypto:bytes_to_integer(G), y = crypto:bytes_to_integer(Y), x = X} - end. - -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -%% EC key generation (OBS: for testing only) -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% - -gen_ec2(CurveId) -> - {PubKey, PrivKey} = crypto:generate_key(ecdh, CurveId), - - #'ECPrivateKey'{version = 1, - privateKey = binary_to_list(PrivKey), - parameters = {namedCurve, pubkey_cert_records:namedCurves(CurveId)}, - publicKey = {0, PubKey}}. - -%% See fips_186-3.pdf -dsa_search(T, P0, Q, Iter) when Iter > 0 -> - P = 2*T*Q*P0 + 1, - case is_prime(P, 50) of - true -> P; - false -> dsa_search(T+1, P0, Q, Iter-1) - end; -dsa_search(_,_,_,_) -> - error. - - -%%%%%%% Crypto Math %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -prime(ByteSize) -> - Rand = odd_rand(ByteSize), - prime_odd(Rand, 0). - -prime_odd(Rand, N) -> - case is_prime(Rand, 50) of - true -> - Rand; - false -> - prime_odd(Rand+2, N+1) - end. - -%% see http://en.wikipedia.org/wiki/Fermat_primality_test -is_prime(_, 0) -> true; -is_prime(Candidate, Test) -> - CoPrime = odd_rand(10000, Candidate), - Result = crypto:mod_pow(CoPrime, Candidate, Candidate) , - is_prime(CoPrime, crypto:bytes_to_integer(Result), Candidate, Test). - -is_prime(CoPrime, CoPrime, Candidate, Test) -> - is_prime(Candidate, Test-1); -is_prime(_,_,_,_) -> - false. - -odd_rand(Size) -> - Min = 1 bsl (Size*8-1), - Max = (1 bsl (Size*8))-1, - odd_rand(Min, Max). - -odd_rand(Min,Max) -> - Delta = Max - Min, - Rand = Min + trunc(rand:uniform() * Delta), - case Rand rem 2 of - 0 -> - Rand + 1; - _ -> - Rand - end. - -extended_gcd(A, B) -> - case A rem B of - 0 -> - {0, 1}; - N -> - {X, Y} = extended_gcd(B, N), - {Y, X-Y*(A div B)} - end. - -pem_to_der(File) -> - {ok, PemBin} = file:read_file(File), - public_key:pem_decode(PemBin). - -der_to_pem(File, Entries) -> - PemBin = public_key:pem_encode(Entries), - file:write_file(File, PemBin). - |