SAM:
- More consistency in key/value syntax some changes taken from ticket #1488 patch 0001 - Clarify destination and private key everywhere - Clarify key=value quoting and lack of escaping (ticket #1488) - Add more v3 references to DATAGRAM SEND and RAW SEND (ticket #1488 comment 7) - More links - HTML-ize the v3 spec
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@ -1,7 +1,7 @@
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{% extends "global/layout.html" %}
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{% block title %}SAM V2 Specification{% endblock %}
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{% block lastupdated %}September 2014{% endblock %}
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{% block accuratefor %}0.9.15{% endblock %}
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{% block lastupdated %}May 2015{% endblock %}
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{% block accuratefor %}0.9.20{% endblock %}
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{% block content %}
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<p>Specified below is a simple client protocol for interacting with I2P.
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</p>
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@ -58,6 +58,10 @@ the key=value pairs can change (e.g. "ONE TWO A=B C=D" or
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"ONE TWO C=D A=B" are both perfectly valid constructions). In
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addition, the protocol is case-sensitive.
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SAM messages are interpreted in UTF-8. Key=value pairs must be separated by
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a single space. Values may be enclosed in double quotes if they contain spaces,
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e.g. key="long value text". There is no escaping mechanism.
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Communication can take three distinct forms:
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* <a href="{{ site_url('docs/api/streaming') }}">Virtual streams</a>
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* <a href="{{ site_url('docs/spec/datagrams') }}#repliable">Repliable datagrams</a> (messages with a FROM field)
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@ -168,11 +172,15 @@ forth to manage the streams, as listed below:
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STREAM CONNECT
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ID=$id
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DESTINATION=$base64key
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DESTINATION=$destination
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This establishes a new virtual connection from the local destination
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to the specified peer, marking it with the session-scoped unique ID.
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The unique ID is an ASCII base 10 integer from 1 through (2^31-1).
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The $destination is the base 64 of the <a href="{{ site_url('docs/spec/common-structures') }}#type_Destination">Destination</a>,
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which is 516 or more base 64 characters (387 or more bytes in binary),
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depending on signature type.
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The SAM bridge replies to this with a stream status message:
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STREAM STATUS
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@ -197,7 +205,7 @@ On the receiving end, the SAM bridge simply notifies the client as
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follows:
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STREAM CONNECTED
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DESTINATION=$base64key
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DESTINATION=$destination
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ID=$id
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This tells the client that the given destination has created a virtual
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@ -205,6 +213,10 @@ connection with them. The following data stream will be marked with
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the given unique ID, that is an ASCII base 10 integer from -1 through
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-(2^31-1).
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The $destination is the base 64 of the <a href="{{ site_url('docs/spec/common-structures') }}#type_Destination">Destination</a>,
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which is 516 or more base 64 characters (387 or more bytes in binary),
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depending on signature type.
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When the client wants to send data on the virtual connection, they
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do so as follows:
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@ -329,15 +341,19 @@ After establishing a SAM session with STYLE=DATAGRAM, the client can
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send the SAM bridge:
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DATAGRAM SEND
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DESTINATION=$base64key
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DESTINATION=$destination
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SIZE=$numBytes\n[$numBytes of data]
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When a datagram arrives, the bridge delivers it to the client via:
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DATAGRAM RECEIVED
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DESTINATION=$base64key
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DESTINATION=$destination
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SIZE=$numBytes\n[$numBytes of data]
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The $destination is the base 64 of the <a href="{{ site_url('docs/spec/common-structures') }}#type_Destination">Destination</a>,
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which is 516 or more base 64 characters (387 or more bytes in binary),
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depending on signature type.
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The SAM bridge never exposes to the client the authentication headers
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or other fields, merely the data that the sender provided. This
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continues until the session is closed (by the client dropping the
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@ -358,9 +374,13 @@ After establishing a SAM session with STYLE=RAW, the client can
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send the SAM bridge:
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RAW SEND
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DESTINATION=$base64key
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DESTINATION=$destination
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SIZE=$numBytes\n[$numBytes of data]
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The $destination is the base 64 of the <a href="{{ site_url('docs/spec/common-structures') }}#type_Destination">Destination</a>,
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which is 516 or more base 64 characters (387 or more bytes in binary),
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depending on signature type.
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When a raw datagram arrives, the bridge delivers it to the client
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via:
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@ -381,7 +401,7 @@ which is answered by
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NAMING REPLY
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RESULT=$result
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NAME=$name
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[VALUE=$base64key]
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[VALUE=$destination]
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[MESSAGE=$message]
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@ -391,11 +411,16 @@ The RESULT value may be one of:
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INVALID_KEY
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KEY_NOT_FOUND
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If NAME=ME, then the reply will contain the base64key used by the
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If NAME=ME, then the reply will contain the destnation used by the
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current session (useful if you're using a TRANSIENT one). If $result
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is not OK, MESSAGE may convey a descriptive message, such as "bad
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format", etc.
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The $destination is the base 64 of the <a href="{{ site_url('docs/spec/common-structures') }}#type_Destination">Destination</a>,
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which is 516 or more base 64 characters (387 or more bytes in binary),
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depending on signature type.
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Public and private base64 keys can be generated using the following
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message:
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@ -404,7 +429,7 @@ message:
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which is answered by
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DEST REPLY
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PUB=$pubkey
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PUB=$destination
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PRIV=$privkey
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As of I2P 0.9.14, an optional parameter SIGNATURE_TYPE is supported.
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@ -412,6 +437,17 @@ The SIGNATURE_TYPE value may be any name (e.g. ECDSA_SHA256_P256, case insensiti
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that is supported by <a href="{{ site_url('docs/spec/common-structures') }}#type_Certificate">Key Certificates</a>.
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The default is DSA_SHA1.
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The $destination is the base 64 of the <a href="{{ site_url('docs/spec/common-structures') }}#type_Destination">Destination</a>,
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which is 516 or more base 64 characters (387 or more bytes in binary),
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depending on signature type.
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The $privkey is the base 64 of the concatenation of the <a href="{{ site_url('docs/spec/common-structures') }}#type_Destination">Destination</a>
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followed by the <a href="{{ site_url('docs/spec/common-structures') }}#type_PrivateKey">Private Key</a>
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followed by the <a href="{{ site_url('docs/spec/common-structures') }}#type_SigningPrivateKey">Signing Private Key</a>,
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which is 884 or more base 64 characters (663 or more bytes in binary),
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depending on signature type.
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The binary format is specified in <a href="http://docs.i2p-projekt.de/javadoc/net/i2p/data/PrivateKeyFile.html">Private Key File</a>.
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----------------------------------------------------------------------
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RESULT values
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----------------------------------------------------------------------
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