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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 | <html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>kcapi_aead_stream_update_last</title><meta name="generator" content="DocBook XSL Stylesheets V1.79.1"><link rel="home" href="index.html" title="Linux Kernel Crypto API User Space Interface Library"><link rel="up" href="ch03s10.html" title="Synchronous AEAD Cipher API - Stream"><link rel="prev" href="API-kcapi-aead-stream-update.html" title="kcapi_aead_stream_update"><link rel="next" href="API-kcapi-aead-stream-op.html" title="kcapi_aead_stream_op"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span class="phrase">kcapi_aead_stream_update_last</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-kcapi-aead-stream-update.html">Prev</a> </td><th width="60%" align="center">Synchronous AEAD Cipher API - Stream</th><td width="20%" align="right"> <a accesskey="n" href="API-kcapi-aead-stream-op.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-kcapi-aead-stream-update-last"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>kcapi_aead_stream_update_last —
send last data for processing (stream)
</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int32_t <b class="fsfunc">kcapi_aead_stream_update_last </b>(</code></td><td>struct kcapi_handle * <var class="pdparam">handle</var>, </td></tr><tr><td> </td><td>struct iovec * <var class="pdparam">iov</var>, </td></tr><tr><td> </td><td>uint32_t <var class="pdparam">iovlen</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1"><a name="idm2815"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>handle</code></em></span></dt><dd><p>
[in] cipher handle
</p></dd><dt><span class="term"><em class="parameter"><code>iov</code></em></span></dt><dd><p>
[in] scatter/gather list with data to be processed by the cipher
operation.
</p></dd><dt><span class="term"><em class="parameter"><code>iovlen</code></em></span></dt><dd><p>
[in] number of scatter/gather list elements.
</p></dd></dl></div></div><div class="refsect1"><a name="idm2833"></a><h2>Description</h2><p>
Using this function call, more plaintext for encryption or ciphertext for
decryption can be submitted to the kernel.
</p><p>
This call is identical to the <code class="function">kcapi_aead_stream_update</code> call with the
exception that it marks the last data buffer before the cipher operation
is triggered. Typically, the tag value is provided with this call.
</p></div><div class="refsect1"><a name="idm2838"></a><h2>WARNING</h2><p>
The memory referenced by <em class="parameter"><code>iov</code></em> is not accessed by the kernel
during this call. The memory is first accessed when <code class="function">kcapi_cipher_stream_op</code>
is called. Thus, you MUST make sure that the referenced memory is still
present at the time <code class="function">kcapi_cipher_stream_op</code> is called.
</p><p>
<em class="parameter"><code>return</code></em> number of bytes sent to the kernel upon success;
a negative errno-style error code if an error occurred
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