diff options
Diffstat (limited to 'lib/public_key/src/pubkey_ssh.erl')
| -rw-r--r-- | lib/public_key/src/pubkey_ssh.erl | 49 |
1 files changed, 44 insertions, 5 deletions
diff --git a/lib/public_key/src/pubkey_ssh.erl b/lib/public_key/src/pubkey_ssh.erl index 7680d0ce59..26fbeb68ce 100644 --- a/lib/public_key/src/pubkey_ssh.erl +++ b/lib/public_key/src/pubkey_ssh.erl @@ -24,6 +24,8 @@ -export([decode/2, encode/2]). -define(UINT32(X), X:32/unsigned-big-integer). +-define(STRING(X), ?UINT32((size(X))), (X)/binary). + %% Max encoded line length is 72, but conformance examples use 68 %% Comment from rfc 4716: "The following are some examples of public %% key files that are compliant (note that the examples all wrap @@ -130,7 +132,13 @@ rfc4716_pubkey_decode(<<?UINT32(Len), Type:Len/binary, {erlint(SizeY, Y), #'Dss-Parms'{p = erlint(SizeP, P), q = erlint(SizeQ, Q), - g = erlint(SizeG, G)}}. + g = erlint(SizeG, G)}}; +rfc4716_pubkey_decode(<<?UINT32(Len), Type:Len/binary, + ?UINT32(SizeId), Id:SizeId/binary, + ?UINT32(SizeQ), Q:SizeQ/binary>>) when Type == <<"ecdsa-sha2-nistp256">>; + Type == <<"ecdsa-sha2-nistp384">>; + Type == <<"ecdsa-sha2-nistp521">> -> + {#'ECPoint'{point = Q}, Id}. openssh_decode(Bin, FileType) -> Lines = binary:split(Bin, <<"\n">>, [global]), @@ -186,12 +194,18 @@ do_openssh_decode(known_hosts = FileType, [Line | Lines], Acc) -> do_openssh_decode(openssh_public_key = FileType, [Line | Lines], Acc) -> case split_n(2, Line, []) of [KeyType, Base64Enc] when KeyType == <<"ssh-rsa">>; - KeyType == <<"ssh-dss">> -> + KeyType == <<"ssh-dss">>; + KeyType == <<"ecdsa-sha2-nistp256">>; + KeyType == <<"ecdsa-sha2-nistp384">>; + KeyType == <<"ecdsa-sha2-nistp521">> -> do_openssh_decode(FileType, Lines, [{openssh_pubkey_decode(KeyType, Base64Enc), []} | Acc]); [KeyType, Base64Enc | Comment0] when KeyType == <<"ssh-rsa">>; - KeyType == <<"ssh-dss">> -> + KeyType == <<"ssh-dss">>; + KeyType == <<"ecdsa-sha2-nistp256">>; + KeyType == <<"ecdsa-sha2-nistp384">>; + KeyType == <<"ecdsa-sha2-nistp521">> -> Comment = string:strip(string_decode(iolist_to_binary(Comment0)), right, $\n), do_openssh_decode(FileType, Lines, [{openssh_pubkey_decode(KeyType, Base64Enc), @@ -203,6 +217,7 @@ decode_comment([]) -> decode_comment(Comment) -> [{comment, string_decode(iolist_to_binary(Comment))}]. + openssh_pubkey_decode(<<"ssh-rsa">>, Base64Enc) -> <<?UINT32(StrLen), _:StrLen/binary, ?UINT32(SizeE), E:SizeE/binary, @@ -222,9 +237,19 @@ openssh_pubkey_decode(<<"ssh-dss">>, Base64Enc) -> #'Dss-Parms'{p = erlint(SizeP, P), q = erlint(SizeQ, Q), g = erlint(SizeG, G)}}; + +openssh_pubkey_decode(<<"ecdsa-sha2-", Id/binary>>, Base64Enc) -> + %% rfc5656#section-3.1 + <<?UINT32(StrLen), _:StrLen/binary, + ?UINT32(SizeId), Id:SizeId/binary, + ?UINT32(SizeQ), Q:SizeQ/binary>> + = base64:mime_decode(Base64Enc), + {#'ECPoint'{point = Q}, Id}; + openssh_pubkey_decode(KeyType, Base64Enc) -> {KeyType, base64:mime_decode(Base64Enc)}. + erlint(MPIntSize, MPIntValue) -> Bits= MPIntSize * 8, <<Integer:Bits/integer>> = MPIntValue, @@ -350,7 +375,9 @@ line_end(Comment) -> key_type(#'RSAPublicKey'{}) -> <<"ssh-rsa">>; key_type({_, #'Dss-Parms'{}}) -> - <<"ssh-dss">>. + <<"ssh-dss">>; +key_type({#'ECPoint'{}, Id}) -> + <<"ecdsa-sha2-",Id/binary>>. comma_list_encode([Option], []) -> Option; @@ -380,7 +407,13 @@ ssh2_pubkey_encode({Y, #'Dss-Parms'{p = P, q = Q, g = G}}) -> PBin/binary, QBin/binary, GBin/binary, - YBin/binary>>. + YBin/binary>>; +ssh2_pubkey_encode({#'ECPoint'{point = Q}, Id}) -> + TypeStr = <<"ecdsa-sha2-", Id/binary>>, + StrLen = size(TypeStr), + <<?UINT32(StrLen), TypeStr:StrLen/binary, + (string(Id))/binary, + (string(Q))/binary>>. is_key_field(<<"ssh-dss">>) -> true; @@ -507,3 +540,9 @@ int_to_bin_neg(-1, Ds=[MSB|_]) when MSB >= 16#80 -> list_to_binary(Ds); int_to_bin_neg(X,Ds) -> int_to_bin_neg(X bsr 8, [(X band 255)|Ds]). + + +string(X) when is_binary(X) -> + << ?STRING(X) >>; +string(X) -> + << ?STRING(list_to_binary(X)) >>. |