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-rw-r--r--lib/ssh/src/ssh.erl9
-rw-r--r--lib/ssh/src/ssh_auth.erl74
-rw-r--r--lib/ssh/src/ssh_connection_handler.erl6
-rw-r--r--lib/ssh/src/ssh_file.erl89
-rw-r--r--lib/ssh/src/ssh_transport.erl69
5 files changed, 113 insertions, 134 deletions
diff --git a/lib/ssh/src/ssh.erl b/lib/ssh/src/ssh.erl
index 29294b836f..eec17fd5d6 100644
--- a/lib/ssh/src/ssh.erl
+++ b/lib/ssh/src/ssh.erl
@@ -23,6 +23,7 @@
-include("ssh.hrl").
-include("ssh_connect.hrl").
+-include_lib("public_key/include/public_key.hrl").
-export([start/0, start/1, stop/0, connect/3, connect/4, close/1, connection_info/2,
channel_info/3,
@@ -367,7 +368,7 @@ inetopt(false) ->
%% Description: Use SSH key to sign data.
%%--------------------------------------------------------------------
sign_data(Data, Algorithm) when is_binary(Data) ->
- case ssh_file:private_identity_key(Algorithm,[]) of
+ case ssh_file:user_key(Algorithm,[]) of
{ok, Key} when Algorithm == "ssh-rsa" ->
public_key:sign(Data, sha, Key);
Error ->
@@ -385,9 +386,9 @@ sign_data(Data, Algorithm) when is_binary(Data) ->
%% Description: Use SSH signature to verify data.
%%--------------------------------------------------------------------
verify_data(Data, Signature, Algorithm) when is_binary(Data), is_binary(Signature) ->
- case ssh_file:public_identity_key(Algorithm, []) of
- {ok, Key} when Algorithm == "ssh-rsa" ->
- public_key:verify(Data, sha, Signature, Key);
+ case ssh_file:user_key(Algorithm, []) of
+ {ok, #'RSAPrivateKey'{publicExponent = E, modulus = N}} when Algorithm == "ssh-rsa" ->
+ public_key:verify(Data, sha, Signature, #'RSAPublicKey'{publicExponent = E, modulus = N});
Error ->
Error
end.
diff --git a/lib/ssh/src/ssh_auth.erl b/lib/ssh/src/ssh_auth.erl
index 3b087262d8..a2e74a12bb 100644
--- a/lib/ssh/src/ssh_auth.erl
+++ b/lib/ssh/src/ssh_auth.erl
@@ -41,16 +41,17 @@ publickey_msg([Alg, #ssh{user = User,
session_id = SessionId,
service = Service,
opts = Opts} = Ssh]) ->
-
+
Hash = sha, %% Maybe option?!
ssh_bits:install_messages(userauth_pk_messages()),
-
- case ssh_file:private_identity_key(Alg, Opts) of
+ KeyCb = proplists:get_value(key_cb, Opts, ssh_file),
+
+ case KeyCb:user_key(Alg, Opts) of
{ok, Key} ->
- PubKeyBlob = ssh_file:encode_public_key(Key),
+ PubKeyBlob = encode_public_key(Key),
SigData = build_sig_data(SessionId,
User, Service, PubKeyBlob, Alg),
- Sig = sign(SigData, Hash, Key),
+ Sig = ssh_transport:sign(SigData, Hash, Key),
SigBlob = list_to_binary([?string(Alg), ?binary(Sig)]),
ssh_transport:ssh_packet(
#ssh_msg_userauth_request{user = User,
@@ -313,21 +314,19 @@ get_password_option(Opts, User) ->
end.
verify_sig(SessionId, User, Service, Alg, KeyBlob, SigWLen, Opts) ->
- {ok, Key} = ssh_file:decode_public_key_v2(KeyBlob, Alg),
- case ssh_file:lookup_user_key(Key, User, Alg, Opts) of
- {ok, OurKey} ->
- case OurKey of
- Key ->
- PlainText = build_sig_data(SessionId, User,
- Service, KeyBlob, Alg),
- <<?UINT32(AlgSigLen), AlgSig:AlgSigLen/binary>> = SigWLen,
- <<?UINT32(AlgLen), _Alg:AlgLen/binary,
- ?UINT32(SigLen), Sig:SigLen/binary>> = AlgSig,
- verify(PlainText, sha, Sig, Key);
- _ ->
- {error, key_unacceptable}
- end;
- Error -> Error
+ {ok, Key} = decode_public_key_v2(KeyBlob, Alg),
+ KeyCb = proplists:get_value(key_cb, Opts, ssh_file),
+
+ case KeyCb:is_auth_key(Key, User, Alg, Opts) of
+ true ->
+ PlainText = build_sig_data(SessionId, User,
+ Service, KeyBlob, Alg),
+ <<?UINT32(AlgSigLen), AlgSig:AlgSigLen/binary>> = SigWLen,
+ <<?UINT32(AlgLen), _Alg:AlgLen/binary,
+ ?UINT32(SigLen), Sig:SigLen/binary>> = AlgSig,
+ ssh_transport:verify(PlainText, sha, Sig, Key);
+ false ->
+ {error, key_unacceptable}
end.
build_sig_data(SessionId, User, Service, KeyBlob, Alg) ->
@@ -346,20 +345,6 @@ algorithm(ssh_rsa) ->
algorithm(ssh_dsa) ->
"ssh-dss".
-sign(SigData, Hash, #'DSAPrivateKey'{} = Key) ->
- DerSignature = public_key:sign(SigData, Hash, Key),
- #'Dss-Sig-Value'{r = R, s = S} = public_key:der_decode('Dss-Sig-Value', DerSignature),
- <<R:160/big-unsigned-integer, S:160/big-unsigned-integer>>;
-sign(SigData, Hash, Key) ->
- public_key:sign(SigData, Hash, Key).
-
-verify(PlainText, Hash, Sig, {_, #'Dss-Parms'{}} = Key) ->
- <<R:160/big-unsigned-integer, S:160/big-unsigned-integer>> = Sig,
- Signature = public_key:der_encode('Dss-Sig-Value', #'Dss-Sig-Value'{r = R, s = S}),
- public_key:verify(PlainText, Hash, Signature, Key);
-verify(PlainText, Hash, Sig, Key) ->
- public_key:verify(PlainText, Hash, Sig, Key).
-
decode_keyboard_interactive_prompts(NumPrompts, Data) ->
Types = lists:append(lists:duplicate(NumPrompts, [string, boolean])),
pairwise_tuplify(ssh_bits:decode(Data, Types)).
@@ -435,3 +420,24 @@ other_alg("ssh-rsa") ->
"ssh-dss";
other_alg("ssh-dss") ->
"ssh-rsa".
+decode_public_key_v2(K_S, "ssh-rsa") ->
+ case ssh_bits:decode(K_S,[string,mpint,mpint]) of
+ ["ssh-rsa", E, N] ->
+ {ok, #'RSAPublicKey'{publicExponent = E, modulus = N}};
+ _ ->
+ {error, bad_format}
+ end;
+decode_public_key_v2(K_S, "ssh-dss") ->
+ case ssh_bits:decode(K_S,[string,mpint,mpint,mpint,mpint]) of
+ ["ssh-dss",P,Q,G,Y] ->
+ {ok, {Y, #'Dss-Parms'{p = P, q = Q, g = G}}};
+ _ ->
+ {error, bad_format}
+ end;
+decode_public_key_v2(_, _) ->
+ {error, bad_format}.
+
+encode_public_key(#'RSAPrivateKey'{publicExponent = E, modulus = N}) ->
+ ssh_bits:encode(["ssh-rsa",E,N], [string,mpint,mpint]);
+encode_public_key(#'DSAPrivateKey'{p = P, q = Q, g = G, y = Y}) ->
+ ssh_bits:encode(["ssh-dss",P,Q,G,Y], [string,mpint,mpint,mpint,mpint]).
diff --git a/lib/ssh/src/ssh_connection_handler.erl b/lib/ssh/src/ssh_connection_handler.erl
index a9bf23953d..9079089d5d 100644
--- a/lib/ssh/src/ssh_connection_handler.erl
+++ b/lib/ssh/src/ssh_connection_handler.erl
@@ -684,16 +684,14 @@ supported_host_keys(server, KeyCb, Options) ->
["ssh-dss", "ssh-rsa"]).
available_host_key(KeyCb, "ssh-dss"= Alg, Opts) ->
- Scope = proplists:get_value(key_scope, Opts, system),
- case KeyCb:private_host_dsa_key(Scope, Opts) of
+ case KeyCb:host_key('ssh-dss', Opts) of
{ok, _} ->
Alg;
Other ->
Other
end;
available_host_key(KeyCb, "ssh-rsa" = Alg, Opts) ->
- Scope = proplists:get_value(key_scope, Opts, system),
- case KeyCb:private_host_rsa_key(Scope, Opts) of
+ case KeyCb:host_key('ssh-rsa', Opts) of
{ok, _} ->
Alg;
Other ->
diff --git a/lib/ssh/src/ssh_file.erl b/lib/ssh/src/ssh_file.erl
index d5cacc3294..97ebf77e82 100644
--- a/lib/ssh/src/ssh_file.erl
+++ b/lib/ssh/src/ssh_file.erl
@@ -28,63 +28,58 @@
-include("ssh.hrl").
--export([public_host_dsa_key/2,private_host_dsa_key/2,
- public_host_rsa_key/2,private_host_rsa_key/2,
- %%public_host_key/2,
- private_host_key/2,
- lookup_host_key/3, add_host_key/3,
- lookup_user_key/4, ssh_dir/2, file_name/3]).
+-export([host_key/2,
+ user_key/2,
+ is_host_key/4,
+ add_host_key/3,
+ is_auth_key/4]).
--export([private_identity_key/2,
- public_identity_key/2]).
-
--export([encode_public_key/1, decode_public_key_v2/2]).
-define(PERM_700, 8#700).
-define(PERM_644, 8#644).
%% API
-public_host_dsa_key(Type, Opts) ->
- File = file_name(Type, "ssh_host_dsa_key.pub", Opts),
- decode(File, public_key).
-private_host_dsa_key(Type, Opts) ->
- File = file_name(Type, "ssh_host_dsa_key", Opts),
+%% Used by server
+host_key(Algorithm, Opts) ->
+ File = file_name(system, file_base_name(Algorithm), Opts),
Password = proplists:get_value(password, Opts, ignore),
decode(File, Password).
-public_host_rsa_key(Type, Opts) ->
- File = file_name(Type, "ssh_host_rsa_key.pub", Opts),
- decode(File, public_key).
-private_host_rsa_key(Type, Opts) ->
- File = file_name(Type, "ssh_host_rsa_key", Opts),
- Password = proplists:get_value(password, Opts, ignore),
- decode(File, Password).
+is_auth_key(Key, User, Alg, Opts) ->
+ case lookup_user_key(Key, User, Alg, Opts) of
+ {ok, Key} ->
+ true;
+ _ ->
+ false
+ end.
-%% public_host_key(Type, Opts) ->
-%% File = file_name(Type, "ssh_host_key", Opts),
-%% decode(File, public_key).
-
-private_host_key(Type, Opts) ->
- File = file_name(Type, "ssh_host_key", Opts),
- Password = proplists:get_value(password, Opts, ignore),
- decode(File, Password).
-private_identity_key(Alg, Opts) ->
+%% Used by client
+is_host_key(Key, PeerName, Algorithm, Opts) ->
+ case lookup_host_key(PeerName, Algorithm, Opts) of
+ {ok, Key} ->
+ true;
+ _ ->
+ false
+ end.
+
+user_key(Alg, Opts) ->
File = file_name(user, identity_key_filename(Alg), Opts),
Password = proplists:get_value(password, Opts, ignore),
decode(File, Password).
-public_identity_key(Alg, Opts) ->
- File = file_name(user, identity_key_filename(Alg) ++ ".pub", Opts),
- decode(File, public_key).
-encode_public_key(#'RSAPrivateKey'{publicExponent = E, modulus = N}) ->
- ssh_bits:encode(["ssh-rsa",E,N], [string,mpint,mpint]);
-encode_public_key(#'DSAPrivateKey'{p = P, q = Q, g = G, y = Y}) ->
- ssh_bits:encode(["ssh-dss",P,Q,G,Y], [string,mpint,mpint,mpint,mpint]).
+%% Internal functions %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+file_base_name('ssh-rsa') ->
+ "ssh_host_rsa_key";
+file_base_name('ssh-dss') ->
+ "ssh_host_dsa_key";
+file_base_name(_) ->
+ "ssh_host_key".
decode(File, Password) ->
try
@@ -184,7 +179,7 @@ file_name(Type, Name, Opts) ->
FN = filename:join(ssh_dir(Type, Opts), Name),
FN.
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
%% in: "host" out: "host,1.2.3.4.
add_ip(Host) ->
@@ -216,22 +211,6 @@ do_lookup_host_key(Host, Alg, Opts) ->
identity_key_filename("ssh-dss") -> "id_dsa";
identity_key_filename("ssh-rsa") -> "id_rsa".
-decode_public_key_v2(K_S, "ssh-rsa") ->
- case ssh_bits:decode(K_S,[string,mpint,mpint]) of
- ["ssh-rsa", E, N] ->
- {ok, #'RSAPublicKey'{publicExponent = E, modulus = N}};
- _ ->
- {error, bad_format}
- end;
-decode_public_key_v2(K_S, "ssh-dss") ->
- case ssh_bits:decode(K_S,[string,mpint,mpint,mpint,mpint]) of
- ["ssh-dss",P,Q,G,Y] ->
- {ok, {Y, #'Dss-Parms'{p = P, q = Q, g = G}}};
- _A ->
- {error, bad_format}
- end;
-decode_public_key_v2(_, _) ->
- {error, bad_format}.
lookup_host_key_fd(Fd, Host, KeyType) ->
case io:get_line(Fd, '') of
diff --git a/lib/ssh/src/ssh_transport.erl b/lib/ssh/src/ssh_transport.erl
index f99b9c9ca7..6140c87f6e 100644
--- a/lib/ssh/src/ssh_transport.erl
+++ b/lib/ssh/src/ssh_transport.erl
@@ -39,7 +39,8 @@
handle_kex_dh_gex_group/2, handle_kex_dh_gex_reply/2,
handle_new_keys/2, handle_kex_dh_gex_request/2,
handle_kexdh_reply/2,
- unpack/3, decompress/2, ssh_packet/2, pack/2, msg_data/1]).
+ unpack/3, decompress/2, ssh_packet/2, pack/2, msg_data/1,
+ sign/3, verify/4]).
versions(client, Options)->
Vsn = proplists:get_value(vsn, Options, ?DEFAULT_CLIENT_VERSION),
@@ -408,37 +409,25 @@ sid(#ssh{session_id = Id}, _) ->
%%
get_host_key(SSH) ->
#ssh{key_cb = Mod, opts = Opts, algorithms = ALG} = SSH,
- Scope = proplists:get_value(key_scope, Opts, system),
- case ALG#alg.hkey of
- 'ssh-rsa' ->
- case Mod:private_host_rsa_key(Scope, Opts) of
- {ok, #'RSAPrivateKey'{modulus = N, publicExponent = E} = Key} ->
- {Key,
- ssh_bits:encode(["ssh-rsa",E,N],[string,mpint,mpint])};
- Error ->
- exit(Error)
- end;
- 'ssh-dss' ->
- case Mod:private_host_dsa_key(Scope, Opts) of
- {ok, #'DSAPrivateKey'{y = Y, p = P, q = Q, g = G} = Key} ->
- {Key, ssh_bits:encode(["ssh-dss",P,Q,G,Y],
- [string,mpint,mpint,mpint,mpint])};
- Error ->
- exit(Error)
- end;
- Foo ->
- exit({error, {Foo, bad_key_type}})
+
+ case Mod:host_key(ALG#alg.hkey, Opts) of
+ {ok, #'RSAPrivateKey'{modulus = N, publicExponent = E} = Key} ->
+ {Key,
+ ssh_bits:encode(["ssh-rsa",E,N],[string,mpint,mpint])};
+ {ok, #'DSAPrivateKey'{y = Y, p = P, q = Q, g = G} = Key} ->
+ {Key, ssh_bits:encode(["ssh-dss",P,Q,G,Y],
+ [string,mpint,mpint,mpint,mpint])};
+ Result ->
+ exit({error, {Result, unsupported_key_type}})
end.
sign_host_key(_Ssh, #'RSAPrivateKey'{} = Private, H) ->
Hash = sha, %% Option ?!
- Signature = public_key:sign(H, Hash, Private),
+ Signature = sign(H, Hash, Private),
ssh_bits:encode(["ssh-rsa", Signature],[string, binary]);
sign_host_key(_Ssh, #'DSAPrivateKey'{} = Private, H) ->
Hash = sha, %% Option ?!
- DerSignature = public_key:sign(H, Hash, Private),
- #'Dss-Sig-Value'{r = R, s = S} = public_key:der_decode('Dss-Sig-Value', DerSignature),
- RawSignature = <<R:160/big-unsigned-integer, S:160/big-unsigned-integer>>,
+ RawSignature = sign(H, Hash, Private),
ssh_bits:encode(["ssh-dss", RawSignature],[string, binary]).
verify_host_key(SSH, K_S, H, H_SIG) ->
@@ -457,7 +446,7 @@ verify_host_key_rsa(SSH, K_S, H, H_SIG) ->
["ssh-rsa", E, N] ->
["ssh-rsa",SIG] = ssh_bits:decode(H_SIG,[string,binary]),
Public = #'RSAPublicKey'{publicExponent = E, modulus = N},
- case public_key:verify(H, sha, SIG, Public) of
+ case verify(H, sha, SIG, Public) of
false ->
{error, bad_signature};
true ->
@@ -472,9 +461,7 @@ verify_host_key_dss(SSH, K_S, H, H_SIG) ->
["ssh-dss",P,Q,G,Y] ->
["ssh-dss",SIG] = ssh_bits:decode(H_SIG,[string,binary]),
Public = {Y, #'Dss-Parms'{p = P, q = Q, g = G}},
- <<R:160/big-unsigned-integer, S:160/big-unsigned-integer>> = SIG,
- Signature = public_key:der_encode('Dss-Sig-Value', #'Dss-Sig-Value'{r = R, s = S}),
- case public_key:verify(H, sha, Signature, Public) of
+ case verify(H, sha, SIG, Public) of
false ->
{error, bad_signature};
true ->
@@ -495,14 +482,10 @@ accepted_host(Ssh, PeerName, Opts) ->
known_host_key(#ssh{opts = Opts, key_cb = Mod, peer = Peer} = Ssh,
Public, Alg) ->
PeerName = peer_name(Peer),
- case Mod:lookup_host_key(PeerName, Alg, Opts) of
- {ok, Public} ->
+ case Mod:is_host_key(Public, PeerName, Alg, Opts) of
+ true ->
ok;
- {ok, BadPublic} ->
- error_logger:format("known_host_key: Public ~p BadPublic ~p\n",
- [Public, BadPublic]),
- {error, bad_public_key};
- {error, not_found} ->
+ false ->
case accepted_host(Ssh, PeerName, Opts) of
yes ->
Mod:add_host_key(PeerName, Public, Opts);
@@ -709,8 +692,20 @@ msg_data(PacketData) ->
_:PaddingLen/binary>> = PacketData,
Data.
+sign(SigData, Hash, #'DSAPrivateKey'{} = Key) ->
+ DerSignature = public_key:sign(SigData, Hash, Key),
+ #'Dss-Sig-Value'{r = R, s = S} = public_key:der_decode('Dss-Sig-Value', DerSignature),
+ <<R:160/big-unsigned-integer, S:160/big-unsigned-integer>>;
+sign(SigData, Hash, Key) ->
+ public_key:sign(SigData, Hash, Key).
+
+verify(PlainText, Hash, Sig, {_, #'Dss-Parms'{}} = Key) ->
+ <<R:160/big-unsigned-integer, S:160/big-unsigned-integer>> = Sig,
+ Signature = public_key:der_encode('Dss-Sig-Value', #'Dss-Sig-Value'{r = R, s = S}),
+ public_key:verify(PlainText, Hash, Signature, Key);
+verify(PlainText, Hash, Sig, Key) ->
+ public_key:verify(PlainText, Hash, Sig, Key).
-
%% public key algorithms
%%
%% ssh-dss REQUIRED sign Raw DSS Key
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 23:17:16 +0000