Commit 57bd59e4 authored by lain's avatar lain
Browse files

Salmon creation.

parent f980f677
......@@ -57,7 +57,7 @@ def decode_and_validate(magickey, salmon) do
end
end
defp decode_key("RSA." <> magickey) do
def decode_key("RSA." <> magickey) do
make_integer = fn(bin) ->
list = :erlang.binary_to_list(bin)
Enum.reduce(list, 0, fn (el, acc) -> (acc <<< 8) ||| el end)
......@@ -70,4 +70,58 @@ defp decode_key("RSA." <> magickey) do
{:RSAPublicKey, modulus, exponent}
end
def encode_key({:RSAPublicKey, modulus, exponent}) do
modulus_enc = :binary.encode_unsigned(modulus) |> Base.url_encode64
exponent_enc = :binary.encode_unsigned(exponent) |> Base.url_encode64
"RSA.#{modulus_enc}.#{exponent_enc}"
end
def generate_rsa_pem do
port = Port.open({:spawn, "openssl genrsa"}, [:binary])
{:ok, pem} = receive do
{^port, {:data, pem}} -> {:ok, pem}
end
Port.close(port)
if Regex.match?(~r/RSA PRIVATE KEY/, pem) do
{:ok, pem}
else
:error
end
end
def keys_from_pem(pem) do
[private_key_code] = :public_key.pem_decode(pem)
private_key = :public_key.pem_entry_decode(private_key_code)
{:RSAPrivateKey, _, modulus, exponent, _, _, _, _, _, _, _} = private_key
public_key = {:RSAPublicKey, modulus, exponent}
{:ok, private_key, public_key}
end
def encode(private_key, doc) do
type = "application/atom+xml"
encoding = "base64url"
alg = "RSA-SHA256"
signed_text = [doc, type, encoding, alg]
|> Enum.map(&Base.url_encode64/1)
|> Enum.join(".")
signature = :public_key.sign(signed_text, :sha256, private_key) |> to_string |> Base.url_encode64
doc_base64= doc |> Base.url_encode64
# Don't need proper xml building, these strings are safe to leave unescaped
salmon = """
<?xml version="1.0" encoding="UTF-8"?>
<me:env xmlns:me="http://salmon-protocol.org/ns/magic-env">
<me:data type="application/atom+xml">#{doc_base64}</me:data>
<me:encoding>#{encoding}</me:encoding>
<me:alg>#{alg}</me:alg>
<me:sig>#{signature}</me:sig>
</me:env>
"""
{:ok, salmon}
end
end
-----BEGIN RSA PRIVATE KEY-----
MIIEowIBAAKCAQEAqnWeDtrqWasCKNXiuSq1tSCLI5H7BSvIROy5YfuGsXHrIlCq
LdIm9QlIUUmIi9QyzgiGEDsPCCkA1UguCVgF/UrJ1+FvHcHsTELkkBu/yCl9mrgt
WzTckhb6KjOhqtxi/TKgRaJ2Rlwz2bvH5sbCP9qffthitdxfh14KC5V0gqDt1xCy
WgZo79vbYMcVkcQoh5uLtG64ksYFBMfgnLaSj7xg5i2qCDiIY7bqBujo5HllDqeo
w3LXmsztt1cT8heXEjW0SYJvAHJK00OsG1kp4cqhfKzxLCHNGQJVHQxLOXy97I7o
HOeuhbxPhjpGSBMgw7YFm3ODXviqf557eqFcaQIDAQABAoIBAC6f+VnK22sncXHF
/zvyyL0AZ86U8XpanW7s6VA5wn/qzwwV0Fa0Mt+3aEaDvIuywSrF/hWWcegjfwzX
r2/y2cCMomUgTopvLrk1WttoG68eWjLlydI2xVZYXpkIgmH/4juri1dAtuVL9wrJ
aEZhe2SH4jSJ74Ya/y5BtLGycaoA9FHyIzHPTx52Ix2jWKWtKimW8J+aERi2uHdN
7yTnLT2APhs5fnvNnn0tg85CI3Ny2GNiqmAail14yVfRz8Sf6qDIepH5Jfz9oll4
I+GYUOLs6eTgkHXBn8LGhtHTE/9UJmb42OyWrW8X+nc/Mjz5xh0u/g1Gdp36oUMz
OotfneECgYEA3cGfQxmxjEqSbXt9jbxiCukU7PmkDDQqBu97URC4N8qEcMF1wW7X
AddU7Kq/UJU+oqjD/7UQHoS2ZThPtto6SpVdXQzsnrnPWQcrv5b1DV/TpXfwGoZ3
svUIAcx4vGzhhmHDJCBsdY6n8xWBYtSqfLFXgN5UkdafLGy3EkCEtmUCgYEAxMgl
7eU2QkWkzgJxOj6xjG2yqM3jxOvvoiRnD0rIQaBS70P/1N94ZkMXzOwddddZ5OW+
55h/a8TmFKP/+NW4PHRYra/dazGI4IBlw6Yeq6uq/4jbuSqtBbaNn/Dz5kdHBTqM
PtbBvc9Fztd2zb3InyyLbb4c+WjMqi0AooN027UCgYB4Tax7GJtLwsEBiDcrB4Ig
7SYfEae/vyT1skIyTmHCUqnbCfk6QUl/hDRcWJ2FuBHM6MW8GZxvEgxpiU0lo+pv
v+xwqKxNx/wHDm7bd6fl45DMee7WVRDnEyuO3kC56E/JOYxGMxjkBcpzg703wqvj
Dcqs7PDwVYDw9uGykzHsSQKBgEQnNcvA+RvW1w9qlSChGgkS7S+9r0dCl8pGZVNM
iTMBfffUS0TE6QQx9IpKtKFdpoq6b3XywR7oIO/BJSRfkOGPQi9Vm5BGpatrjNNI
M5Mtb5n1InRtLWOvKDnez/pPcW+EKZKR+qPsp7bNtR3ovxUx7lBh6dMP0uKVl4Sx
lsWJAoGBAIeek9eG+S3m2jaJRHasfKo5mJ2JrrmnjQXUOGUP8/CgO8sW1VmG2WAk
Av7+BRI2mP2f+3SswG/AoRGmRXXw65ly63ws8ixrhK0MG3MgqDkWc69SbTaaMJ+u
BQFYMsB1vZdUV3CaRqySkjY68QWGcJ4Z5JKHuTXzKv/GeFmw0V9R
-----END RSA PRIVATE KEY-----
......@@ -16,4 +16,37 @@ test "errors on wrong magic key" do
{:ok, salmon} = File.read("test/fixtures/salmon.xml")
assert Salmon.decode_and_validate(@wrong_magickey, salmon) == :error
end
test "generates an RSA private key pem" do
{:ok, key} = Salmon.generate_rsa_pem
assert is_binary(key)
assert Regex.match?(~r/RSA/, key)
end
test "it encodes a magic key from a public key" do
key = Salmon.decode_key(@magickey)
magic_key = Salmon.encode_key(key)
assert @magickey == magic_key
end
test "returns a public and private key from a pem" do
pem = File.read!("test/fixtures/private_key.pem")
{:ok, private, public} = Salmon.keys_from_pem(pem)
assert elem(private, 0) == :RSAPrivateKey
assert elem(public, 0) == :RSAPublicKey
end
test "encodes an xml payload with a private key" do
doc = File.read!("test/fixtures/incoming_note_activity.xml")
pem = File.read!("test/fixtures/private_key.pem")
{:ok, private, public} = Salmon.keys_from_pem(pem)
# Let's try a roundtrip.
{:ok, salmon} = Salmon.encode(private, doc)
{:ok, decoded_doc} = Salmon.decode_and_validate(Salmon.encode_key(public), salmon)
assert doc == decoded_doc
end
end
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