From 34fa6383ea9e065a4555d2d263149893b8d7b1ad Mon Sep 17 00:00:00 2001 From: Ingela Anderton Andin Date: Thu, 21 Aug 2014 12:58:09 +0200 Subject: public_key: Add encodeing functionality for PBES1 and PBES2 --- lib/public_key/src/pubkey_pbe.erl | 49 +++++++++++++++++++++++++++++++++++---- lib/public_key/src/pubkey_pem.erl | 12 ++++++++++ lib/public_key/src/public_key.erl | 10 ++++++-- 3 files changed, 65 insertions(+), 6 deletions(-) (limited to 'lib/public_key/src') diff --git a/lib/public_key/src/pubkey_pbe.erl b/lib/public_key/src/pubkey_pbe.erl index bd9322d85c..521a32189d 100644 --- a/lib/public_key/src/pubkey_pbe.erl +++ b/lib/public_key/src/pubkey_pbe.erl @@ -22,7 +22,7 @@ -include("public_key.hrl"). --export([encode/4, decode/4, decrypt_parameters/1]). +-export([encode/4, decode/4, decrypt_parameters/1, encrypt_parameters/1]). -export([pbdkdf1/4, pbdkdf2/7]). -define(DEFAULT_SHA_MAC_KEYLEN, 20). @@ -40,16 +40,16 @@ %%-------------------------------------------------------------------- encode(Data, Password, "DES-CBC" = Cipher, KeyDevParams) -> {Key, IV} = password_to_key_and_iv(Password, Cipher, KeyDevParams), - crypto:block_encrypt(des_cbc, Key, IV, Data); + crypto:block_encrypt(des_cbc, Key, IV, pbe_pad(Data, KeyDevParams)); encode(Data, Password, "DES-EDE3-CBC" = Cipher, KeyDevParams) -> {Key, IV} = password_to_key_and_iv(Password, Cipher, KeyDevParams), <> = Key, - crypto:block_encrypt(des3_cbc, [Key1, Key2, Key3], IV, Data); + crypto:block_encrypt(des3_cbc, [Key1, Key2, Key3], IV, pbe_pad(Data)); encode(Data, Password, "RC2-CBC" = Cipher, KeyDevParams) -> {Key, IV} = password_to_key_and_iv(Password, Cipher, KeyDevParams), - crypto:block_encrypt(rc2_cbc, Key, IV, Data). + crypto:block_encrypt(rc2_cbc, Key, IV, pbe_pad(Data, KeyDevParams)). %%-------------------------------------------------------------------- -spec decode(binary(), string(), string(), term()) -> binary(). %% @@ -108,6 +108,15 @@ decrypt_parameters(#'EncryptedPrivateKeyInfo_encryptionAlgorithm'{ algorithm = Oid, parameters = Param}) -> decrypt_parameters(Oid, Param). + +%%-------------------------------------------------------------------- +-spec encrypt_parameters({Cipher::string(), Params::term()}) -> + #'EncryptedPrivateKeyInfo_encryptionAlgorithm'{}. +%% +%% Description: Performs ANS1-decoding of encryption parameters. +%%-------------------------------------------------------------------- +encrypt_parameters({Cipher, Params}) -> + encrypt_parameters(Cipher, Params). %%-------------------------------------------------------------------- %%% Internal functions %%-------------------------------------------------------------------- @@ -187,6 +196,38 @@ decrypt_parameters(?'pbeWithMD5AndDES-CBC', DekParams) -> {ok, Params} = 'PKCS-FRAME':decode('PBEParameter', DekParams), {"DES-CBC", {Params, md5}}. +encrypt_parameters(_Cipher, #'PBES2-params'{} = Params) -> + {ok, Der} ='PKCS-FRAME':encode('PBES2-params', Params), + #'EncryptedPrivateKeyInfo_encryptionAlgorithm'{ + algorithm = ?'id-PBES2', + parameters = Der}; + +encrypt_parameters(Cipher, {#'PBEParameter'{} = Params, Hash}) -> + {ok, Der} ='PKCS-FRAME':encode('PBEParameter', Params), + #'EncryptedPrivateKeyInfo_encryptionAlgorithm'{ + algorithm = pbe1_oid(Cipher, Hash), + parameters = Der}. + +pbe1_oid("RC2-CBC", sha) -> + ?'pbeWithSHA1AndRC2-CBC'; +pbe1_oid("DES-CBC", sha) -> + ?'pbeWithSHA1AndDES-CBC'; +pbe1_oid("RC2-CBC", md5) -> + ?'pbeWithMD5AndRC2-CBC'; +pbe1_oid("DES-CBC", md5) -> + ?'pbeWithMD5AndDES-CBC'. + +pbe_pad(Data, {#'PBEParameter'{}, _}) -> + pbe_pad(Data); +pbe_pad(Data, #'PBES2-params'{}) -> + pbe_pad(Data); +pbe_pad(Data, _) -> + Data. + +pbe_pad(Data) -> + N = 8 - (erlang:byte_size(Data) rem 8), + Pad = list_to_binary(lists:duplicate(N, N)), + <>. key_derivation_params(#'PBES2-params'{keyDerivationFunc = KeyDerivationFunc, encryptionScheme = EncScheme}) -> diff --git a/lib/public_key/src/pubkey_pem.erl b/lib/public_key/src/pubkey_pem.erl index bee57a223d..8d2e97ad77 100644 --- a/lib/public_key/src/pubkey_pem.erl +++ b/lib/public_key/src/pubkey_pem.erl @@ -94,6 +94,10 @@ encode_pem_entries(Entries) -> encode_pem_entry({Type, Der, not_encrypted}) -> StartStr = pem_start(Type), [StartStr, "\n", b64encode_and_split(Der), "\n", pem_end(StartStr) ,"\n\n"]; +encode_pem_entry({'PrivateKeyInfo', Der, EncParams}) -> + EncDer = encode_encrypted_private_keyinfo(Der, EncParams), + StartStr = pem_start('EncryptedPrivateKeyInfo'), + [StartStr, "\n", b64encode_and_split(EncDer), "\n", pem_end(StartStr) ,"\n\n"]; encode_pem_entry({Type, Der, {Cipher, Salt}}) -> StartStr = pem_start(Type), [StartStr,"\n", pem_decrypt(),"\n", pem_decrypt_info(Cipher, Salt),"\n", @@ -139,6 +143,12 @@ decode_encrypted_private_keyinfo(Der) -> DecryptParams = pubkey_pbe:decrypt_parameters(AlgorithmInfo), {'PrivateKeyInfo', iolist_to_binary(Data), DecryptParams}. + +encode_encrypted_private_keyinfo(EncData, EncryptParmams) -> + AlgorithmInfo = pubkey_pbe:encrypt_parameters(EncryptParmams), + public_key:der_encode('EncryptedPrivateKeyInfo', + #'EncryptedPrivateKeyInfo'{encryptionAlgorithm = AlgorithmInfo, + encryptedData = EncData}). split_bin(Bin) -> split_bin(0, Bin). @@ -197,6 +207,8 @@ pem_start('DSAPrivateKey') -> <<"-----BEGIN DSA PRIVATE KEY-----">>; pem_start('DHParameter') -> <<"-----BEGIN DH PARAMETERS-----">>; +pem_start('EncryptedPrivateKeyInfo') -> + <<"-----BEGIN ENCRYPTED PRIVATE KEY-----">>; pem_start('CertificationRequest') -> <<"-----BEGIN CERTIFICATE REQUEST-----">>; pem_start('ContentInfo') -> diff --git a/lib/public_key/src/public_key.erl b/lib/public_key/src/public_key.erl index c70053d2d9..bbe54ad4e1 100644 --- a/lib/public_key/src/public_key.erl +++ b/lib/public_key/src/public_key.erl @@ -173,13 +173,19 @@ pem_entry_encode(Asn1Type, Entity, {{Cipher, #'PBES2-params'{}} = CipherInfo, is_list(Password) andalso is_list(Cipher) -> do_pem_entry_encode(Asn1Type, Entity, CipherInfo, Password); - +pem_entry_encode(Asn1Type, Entity, {{Cipher, + {#'PBEParameter'{}, _}} = CipherInfo, + Password}) when is_atom(Asn1Type) andalso + is_list(Password) andalso + is_list(Cipher) -> + do_pem_entry_encode(Asn1Type, Entity, CipherInfo, Password); pem_entry_encode(Asn1Type, Entity, {{Cipher, Salt} = CipherInfo, Password}) when is_atom(Asn1Type) andalso is_list(Password) andalso is_list(Cipher) andalso is_binary(Salt) andalso - erlang:byte_size(Salt) == 8 -> + ((erlang:byte_size(Salt) == 8) or + (erlang:byte_size(Salt) == 16)) -> do_pem_entry_encode(Asn1Type, Entity, CipherInfo, Password). %%-------------------------------------------------------------------- -- cgit v1.2.3