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| author | Hans Nilsson <[email protected]> | 2018-06-27 13:44:07 +0200 |
|---|---|---|
| committer | Hans Nilsson <[email protected]> | 2018-08-23 12:46:59 +0200 |
| commit | 159b55f2fc7e61e1beebc904eec41a066c41508b (patch) | |
| tree | e5edc874b0cbd420c0787d7ad0a01268b62367b2 | |
| parent | bd78bea89c1583af283b058247370ddfd06833a9 (diff) | |
| download | otp-159b55f2fc7e61e1beebc904eec41a066c41508b.tar.gz otp-159b55f2fc7e61e1beebc904eec41a066c41508b.tar.bz2 otp-159b55f2fc7e61e1beebc904eec41a066c41508b.zip | |
ssh: Fix non-conforming key generation in kex for x25519 and x448
That is, curve25519-sha256, [email protected] and curve448-sha512
| -rw-r--r-- | lib/ssh/src/ssh_message.erl | 8 | ||||
| -rw-r--r-- | lib/ssh/src/ssh_transport.erl | 12 |
2 files changed, 14 insertions, 6 deletions
diff --git a/lib/ssh/src/ssh_message.erl b/lib/ssh/src/ssh_message.erl index 55c0548c9b..da4027a763 100644 --- a/lib/ssh/src/ssh_message.erl +++ b/lib/ssh/src/ssh_message.erl @@ -289,12 +289,12 @@ encode(#ssh_msg_kex_dh_gex_reply{ <<?Ebyte(?SSH_MSG_KEX_DH_GEX_REPLY), ?Ebinary(EncKey), ?Empint(F), ?Ebinary(EncSign)>>; encode(#ssh_msg_kex_ecdh_init{q_c = Q_c}) -> - <<?Ebyte(?SSH_MSG_KEX_ECDH_INIT), ?Empint(Q_c)>>; + <<?Ebyte(?SSH_MSG_KEX_ECDH_INIT), ?Ebinary(Q_c)>>; encode(#ssh_msg_kex_ecdh_reply{public_host_key = {Key,SigAlg}, q_s = Q_s, h_sig = Sign}) -> EncKey = public_key:ssh_encode(Key, ssh2_pubkey), EncSign = encode_signature(Key, SigAlg, Sign), - <<?Ebyte(?SSH_MSG_KEX_ECDH_REPLY), ?Ebinary(EncKey), ?Empint(Q_s), ?Ebinary(EncSign)>>; + <<?Ebyte(?SSH_MSG_KEX_ECDH_REPLY), ?Ebinary(EncKey), ?Ebinary(Q_s), ?Ebinary(EncSign)>>; encode(#ssh_msg_ignore{data = Data}) -> <<?Ebyte(?SSH_MSG_IGNORE), ?Estring_utf8(Data)>>; @@ -504,13 +504,13 @@ decode(<<?BYTE(?SSH_MSG_KEX_DH_GEX_REPLY), ?DEC_BIN(Key,__0), ?DEC_MPINT(F,__1), h_sig = decode_signature(Hashsign) }; -decode(<<"ecdh",?BYTE(?SSH_MSG_KEX_ECDH_INIT), ?DEC_MPINT(Q_c,__0)>>) -> +decode(<<"ecdh",?BYTE(?SSH_MSG_KEX_ECDH_INIT), ?DEC_BIN(Q_c,__0)>>) -> #ssh_msg_kex_ecdh_init{ q_c = Q_c }; decode(<<"ecdh",?BYTE(?SSH_MSG_KEX_ECDH_REPLY), - ?DEC_BIN(Key,__1), ?DEC_MPINT(Q_s,__2), ?DEC_BIN(Sig,__3)>>) -> + ?DEC_BIN(Key,__1), ?DEC_BIN(Q_s,__2), ?DEC_BIN(Sig,__3)>>) -> #ssh_msg_kex_ecdh_reply{ public_host_key = public_key:ssh_decode(Key, ssh2_pubkey), q_s = Q_s, diff --git a/lib/ssh/src/ssh_transport.erl b/lib/ssh/src/ssh_transport.erl index 4bef5e2cbb..9aebf4cb3c 100644 --- a/lib/ssh/src/ssh_transport.erl +++ b/lib/ssh/src/ssh_transport.erl @@ -1808,6 +1808,7 @@ hash(K, H, Ki, N, HashAlg) -> kex_hash(SSH, Key, HashAlg, Args) -> crypto:hash(HashAlg, kex_plaintext(SSH,Key,Args)). + kex_plaintext(SSH, Key, Args) -> EncodedKey = public_key:ssh_encode(Key, ssh2_pubkey), <<?Estring(SSH#ssh.c_version), ?Estring(SSH#ssh.s_version), @@ -1815,8 +1816,13 @@ kex_plaintext(SSH, Key, Args) -> ?Ebinary(EncodedKey), (kex_alg_dependent(Args))/binary>>. + +kex_alg_dependent({Q_c, Q_s, K}) when is_binary(Q_c), is_binary(Q_s) -> + %% ecdh + <<?Ebinary(Q_c), ?Ebinary(Q_s), ?Empint(K)>>; + kex_alg_dependent({E, F, K}) -> - %% diffie-hellman and ec diffie-hellman (with E = Q_c, F = Q_s) + %% diffie-hellman <<?Empint(E), ?Empint(F), ?Empint(K)>>; kex_alg_dependent({-1, NBits, -1, Prime, Gen, E, F, K}) -> @@ -1933,11 +1939,13 @@ parallell_gen_key(Ssh = #ssh{keyex_key = {x, {G, P}}, Ssh#ssh{keyex_key = {{Private, Public}, {G, P}}}. +generate_key(ecdh = Algorithm, Args) -> + crypto:generate_key(Algorithm, Args); generate_key(Algorithm, Args) -> {Public,Private} = crypto:generate_key(Algorithm, Args), {crypto:bytes_to_integer(Public), crypto:bytes_to_integer(Private)}. - + compute_key(Algorithm, OthersPublic, MyPrivate, Args) -> Shared = crypto:compute_key(Algorithm, OthersPublic, MyPrivate, Args), crypto:bytes_to_integer(Shared). |