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authorIngela Anderton Andin <[email protected]>2015-04-22 16:17:50 +0200
committerIngela Anderton Andin <[email protected]>2015-04-22 16:18:39 +0200
commit6cedde4ae59a6e8505d7fc8ac22111a7a8b15e4c (patch)
tree03ef041f2b51f8c5a51d4c9c88ee00592108c191 /lib/ssh
parent0bf8c6a7954055d672c268f08be37596264a78c5 (diff)
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ssh: Move code example to Users Guide
Diffstat (limited to 'lib/ssh')
-rw-r--r--lib/ssh/doc/src/ssh_sftp.xml65
-rw-r--r--lib/ssh/doc/src/using_ssh.xml67
2 files changed, 71 insertions, 61 deletions
diff --git a/lib/ssh/doc/src/ssh_sftp.xml b/lib/ssh/doc/src/ssh_sftp.xml
index d52613c6bc..4ed5a38de4 100644
--- a/lib/ssh/doc/src/ssh_sftp.xml
+++ b/lib/ssh/doc/src/ssh_sftp.xml
@@ -300,20 +300,9 @@
<seealso marker="stdlib:erl_tar#init-3">erl_tar:init/3</seealso> function.
</p>
- <p>Example of writing and then reading a tar file follows:</p>
- <code type="erlang">
- {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> For code exampel see Section
+ <seealso marker="using_ssh">SFTP Client with TAR Compression and Encryption</seealso> in
+ the ssh Users Guide. </p>
<p>The <c>crypto</c> mode option is applied to the generated stream of bytes prior to sending
them to the SFTP server. This is intended for encryption but can be used for other
@@ -332,53 +321,7 @@
<c>ChunkSize</c>s can be changed in the return from the <c>EncryptFun</c> or
<c>DecryptFun</c>. The value can be changed between <c>pos_integer()</c> and <c>undefined</c>.
</p>
- <p>The previous write and read example can be extended with encryption and decryption as follows:</p>
- <code type="erlang">
- %% First three parameters depending on which crypto type we select:
- Key = &lt;&lt;"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>
diff --git a/lib/ssh/doc/src/using_ssh.xml b/lib/ssh/doc/src/using_ssh.xml
index 64477cb493..9da839d072 100644
--- a/lib/ssh/doc/src/using_ssh.xml
+++ b/lib/ssh/doc/src/using_ssh.xml
@@ -229,6 +229,73 @@
</section>
<section>
+ <title>SFTP Client with TAR Compression and Encryption</title>
+
+ <p>Example of writing and then reading a tar file follows:</p>
+ <code type="erlang">
+ {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 previous write and read example can be extended with encryption and decryption as follows:</p>
+ <code type="erlang">
+ %% First three parameters depending on which crypto type we select:
+ Key = &lt;&lt;"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>
+ </section>
+
+ <section>
<title>Creating a Subsystem</title>
<p>A small <c>ssh</c> subsystem that echoes N bytes can be implemented as shown