diff options
Diffstat (limited to 'lib/ssh/doc/src')
| -rw-r--r-- | lib/ssh/doc/src/ssh_connection.xml | 59 | ||||
| -rw-r--r-- | lib/ssh/doc/src/ssh_sftp.xml | 112 |
2 files changed, 164 insertions, 7 deletions
diff --git a/lib/ssh/doc/src/ssh_connection.xml b/lib/ssh/doc/src/ssh_connection.xml index 72e7252536..ff72cf7ee0 100644 --- a/lib/ssh/doc/src/ssh_connection.xml +++ b/lib/ssh/doc/src/ssh_connection.xml @@ -5,7 +5,7 @@ <header> <copyright> <year>2008</year> - <year>2013</year> + <year>2014</year> <holder>Ericsson AB, All Rights Reserved</holder> </copyright> <legalnotice> @@ -137,7 +137,7 @@ <tag><c><![CDATA[{pty, ssh_channel_id(), boolean() = WantReply, {string() = Terminal, integer() = CharWidth, - integer() = RowHeight, integer() = PixelWidth, integer() = PixelHight, + integer() = RowHeight, integer() = PixelWidth, integer() = PixelHeight, [{atom() | integer() = Opcode, integer() = Value}] = TerminalModes}}]]></c></tag> <item>A pseudo-terminal has been requested for the @@ -148,11 +148,11 @@ drawable area of the window. The <c>Opcode</c> in the <c>TerminalModes</c> list is the mnemonic name, represented as an lowercase erlang atom, defined in - <url href="http://www.ietf.org/rfc/rfc4254.txt">RFC 4254 </url> section 8, - or the opcode if the mnemonic name is not listed in the + <url href="http://www.ietf.org/rfc/rfc4254.txt">RFC 4254 </url> section 8. + It may also be an opcode if the mnemonic name is not listed in the RFC. Example <c>OP code: 53, mnemonic name ECHO erlang atom: - echo</c>. There is currently no API function to generate this - event.</item> + echo</c>.This event is sent as result of calling <seealso + marker="ssh_connection#ptty_alloc/4">ssh_connection:ptty_alloc/4</seealso></item> <tag><c><![CDATA[{shell, boolean() = WantReply}]]></c></tag> <item> This message will request that the user's default shell @@ -273,7 +273,52 @@ </desc> </func> - <func> + <func> + <name>ptty_alloc(ConnectionRef, ChannelId, Options, Timeout) -> success | failure</name> + <fsummary>Send status replies to requests that want such replies. </fsummary> + <type> + <v> ConnectionRef = ssh_connection_ref() </v> + <v> ChannelId = ssh_channel_id()</v> + <v> Options = proplists:proplist()</v> + </type> + <desc> + <p> Sends a SSH Connection Protocol pty_req, to allocate a pseudo tty. + Should be called by a SSH client process. + Options are: + </p> + + <taglist> + <tag>{term, string()}</tag> + <item> + Defaults to os:getenv("TERM") or "vt100" if it is undefined. + </item> + <tag>{width, integer()}</tag> + <item> + Defaults to 80 if pixel_width is not defined. + </item> + <tag>{height, integer()}</tag> + <item> + Defaults to 24 if pixel_height is not defined. + </item> + <tag>{pixel_width, integer()}</tag> + <item> + Is disregarded if width is defined. + </item> + <tag>{pixel_height, integer()}</tag> + <item> + Is disregarded if height is defined. + </item> + <tag>{pty_opts, [{posix_atom(), integer()}]}</tag> + <item> + Option may be an empty list, otherwise + see possible POSIX names in section 8 in <url href="http://www.ietf.org/rfc/rfc4254.txt"> RFC 4254</url>. + </item> + </taglist> + + </desc> + </func> + + <func> <name>reply_request(ConnectionRef, WantReply, Status, ChannelId) -> ok</name> <fsummary>Send status replies to requests that want such replies. </fsummary> <type> diff --git a/lib/ssh/doc/src/ssh_sftp.xml b/lib/ssh/doc/src/ssh_sftp.xml index f1091e9eca..ab111562f9 100644 --- a/lib/ssh/doc/src/ssh_sftp.xml +++ b/lib/ssh/doc/src/ssh_sftp.xml @@ -194,6 +194,118 @@ can be used for reading directory contents.</p> </desc> </func> + + <func> + <name>open_tar(ChannelPid, Path, Mode) -></name> + <name>open_tar(ChannelPid, Path, Mode, Timeout) -> {ok, Handle} | {error, Reason}</name> + <fsummary>Opens a tar file on the server to which <v>ChannelPid</v> is connected and returns a handle</fsummary> + <type> + <v>ChannelPid = pid()</v> + <v>Path = string()</v> + <v>Mode = [read] | [write] | [read,EncryptOpt] | [write,DecryptOpt] </v> + <v>EncryptOpt = {crypto,{InitFun,EncryptFun,CloseFun}}</v> + <v>DecryptOpt = {crypto,{InitFun,DecryptFun}}</v> + <v>InitFun = (fun() -> {ok,CryptoState}) | (fun() -> {ok,CryptoState,ChunkSize}) </v> + <v>CryptoState = any()</v> + <v>ChunkSize = undefined | pos_integer()</v> + <v>EncryptFun = (fun(PlainBin,CryptoState) -> EncryptResult)</v> + <v>EncryptResult = {ok,EncryptedBin,CryptoState} | {ok,EncryptedBin,CryptoState,ChunkSize}</v> + <v>PlainBin = binary()</v> + <v>EncryptedBin = binary()</v> + <v>DecryptFun = (fun(EncryptedBin,CryptoState) -> DecryptResult)</v> + <v>DecryptResult = {ok,PlainBin,CryptoState} | {ok,PlainBin,CryptoState,ChunkSize}</v> + <v>CloseFun = (fun(PlainBin,CryptoState) -> {ok,EncryptedBin})</v> + <v>Timeout = timeout()</v> + <v>Reason = term()</v> + </type> + <desc> + <p>Opens a handle to a tar file on the server associated with <c>ChannelPid</c>. The handle + can be used for remote tar creation and extraction as defined by the + <seealso marker="stdlib:erl_tar#init/3">erl_tar:init/3</seealso> function. + </p> + <p>An example of writing and then reading a tar file:</p> + <code type="none"> + {ok,HandleWrite} = ssh_sftp:open_tar(ChannelPid, ?tar_file_name, [write]), + ok = erl_tar:add(HandleWrite, .... ), + ok = erl_tar:add(HandleWrite, .... ), + ... + ok = erl_tar:add(HandleWrite, .... ), + ok = erl_tar:close(HandleWrite), + + %% And for reading + {ok,HandleRead} = ssh_sftp:open_tar(ChannelPid, ?tar_file_name, [read]), + {ok,NameValueList} = erl_tar:extract(HandleRead,[memory]), + ok = erl_tar:close(HandleRead), + </code> + + <p>The <c>crypto</c> mode option is applied to the generated stream of bytes just prior to sending + them to the sftp server. This is intended for encryption but could of course be used for other + purposes. + </p> + <p>The <c>InitFun</c> is applied once + prior to any other crypto operation. The returned <c>CryptoState</c> is then folded into + repeated applications of the <c>EncryptFun</c> or <c>DecryptFun</c>. The binary returned + from those Funs are sent further to the remote sftp server. Finally - if doing encryption + - the <c>CloseFun</c> is applied to the last piece of data. The <c>CloseFun</c> is + responsible for padding (if needed) and encryption of that last piece. + </p> + <p>The <c>ChunkSize</c> defines the size of the <c>PlainBin</c>s that <c>EncodeFun</c> is applied + to. If the <c>ChunkSize</c> is <c>undefined</c> the size of the <c>PlainBin</c>s varies because + this is inteded for stream crypto while a fixed <c>ChunkSize</c> is intended for block crypto. It + is possible to change the <c>ChunkSize</c>s in the return from the <c>EncryptFun</c> or + <c>DecryptFun</c>. It is in fact possible to change the value between <c>pos_integer()</c> and + <c>undefined</c>. + </p> + <p>The write and read example above can be extended with encryption and decryption:</p> + <code type="none"> + %% First three parameters depending on which crypto type we select: + Key = <<"This is a 256 bit key. abcdefghi">>, + Ivec0 = crypto:rand_bytes(16), + DataSize = 1024, % DataSize rem 16 = 0 for aes_cbc + + %% Initialization of the CryptoState, in this case it is the Ivector. + InitFun = fun() -> {ok, Ivec0, DataSize} end, + + %% How to encrypt: + EncryptFun = + fun(PlainBin,Ivec) -> + EncryptedBin = crypto:block_encrypt(aes_cbc256, Key, Ivec, PlainBin), + {ok, EncryptedBin, crypto:next_iv(aes_cbc,EncryptedBin)} + end, + + %% What to do with the very last block: + CloseFun = + fun(PlainBin, Ivec) -> + EncryptedBin = crypto:block_encrypt(aes_cbc256, Key, Ivec, + pad(16,PlainBin) %% Last chunk + ), + {ok, EncryptedBin} + end, + + Cw = {InitFun,EncryptFun,CloseFun}, + {ok,HandleWrite} = ssh_sftp:open_tar(ChannelPid, ?tar_file_name, [write,{crypto,Cw}]), + ok = erl_tar:add(HandleWrite, .... ), + ok = erl_tar:add(HandleWrite, .... ), + ... + ok = erl_tar:add(HandleWrite, .... ), + ok = erl_tar:close(HandleWrite), + + %% And for decryption (in this crypto example we could use the same InitFun + %% as for encryption): + DecryptFun = + fun(EncryptedBin,Ivec) -> + PlainBin = crypto:block_decrypt(aes_cbc256, Key, Ivec, EncryptedBin), + {ok, PlainBin, crypto:next_iv(aes_cbc,EncryptedBin)} + end, + + Cr = {InitFun,DecryptFun}, + {ok,HandleRead} = ssh_sftp:open_tar(ChannelPid, ?tar_file_name, [read,{crypto,Cw}]), + {ok,NameValueList} = erl_tar:extract(HandleRead,[memory]), + ok = erl_tar:close(HandleRead), + </code> + </desc> + </func> + <func> <name>close(ChannelPid, Handle) -> </name> <name>close(ChannelPid, Handle, Timeout) -> ok | {error, Reason}</name> |