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<title>GnuTLS 3.5.3: Key generation</title>
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<a name="Key-generation"></a>
<div class="header">
<p>
Next: <a href="Using-keys.html#Using-keys" accesskey="n" rel="next">Using keys</a>, Previous: <a href="Keys-in-TPM.html#Keys-in-TPM" accesskey="p" rel="prev">Keys in TPM</a>, Up: <a href="Trusted-Platform-Module.html#Trusted-Platform-Module" accesskey="u" rel="up">Trusted Platform Module</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Function-and-Data-Index.html#Function-and-Data-Index" title="Index" rel="index">Index</a>]</p>
</div>
<hr>
<a name="Key-generation-1"></a>
<h4 class="subsection">5.4.2 Key generation</h4>
<p>All keys used by the TPM must be generated by the TPM. This can be
done using <a href="TPM-API.html#gnutls_005ftpm_005fprivkey_005fgenerate">gnutls_tpm_privkey_generate</a>.
</p>
<dl>
<dt><a name="index-gnutls_005ftpm_005fprivkey_005fgenerate"></a>Function: <em>int</em> <strong>gnutls_tpm_privkey_generate</strong> <em>(gnutls_pk_algorithm_t <var>pk</var>, unsigned int <var>bits</var>, const char * <var>srk_password</var>, const char * <var>key_password</var>, gnutls_tpmkey_fmt_t <var>format</var>, gnutls_x509_crt_fmt_t <var>pub_format</var>, gnutls_datum_t * <var>privkey</var>, gnutls_datum_t * <var>pubkey</var>, unsigned int <var>flags</var>)</em></dt>
<dd><p><var>pk</var>: the public key algorithm
</p>
<p><var>bits</var>: the security bits
</p>
<p><var>srk_password</var>: a password to protect the exported key (optional)
</p>
<p><var>key_password</var>: the password for the TPM (optional)
</p>
<p><var>format</var>: the format of the private key
</p>
<p><var>pub_format</var>: the format of the public key
</p>
<p><var>privkey</var>: the generated key
</p>
<p><var>pubkey</var>: the corresponding public key (may be null)
</p>
<p><var>flags</var>: should be a list of GNUTLS_TPM_* flags
</p>
<p>This function will generate a private key in the TPM
chip. The private key will be generated within the chip
and will be exported in a wrapped with TPM’s master key
form. Furthermore the wrapped key can be protected with
the provided <code>password</code> .
</p>
<p>Note that bits in TPM is quantized value. If the input value
is not one of the allowed values, then it will be quantized to
one of 512, 1024, 2048, 4096, 8192 and 16384.
</p>
<p>Allowed flags are:
</p>
<p><strong>Returns:</strong> On success, <code>GNUTLS_E_SUCCESS</code> (0) is returned, otherwise a
negative error value.
</p>
<p><strong>Since:</strong> 3.1.0
</p></dd></dl>
<dl compact="compact">
<dt><code><var>int</var> <a href="TPM-API.html#gnutls_005ftpm_005fget_005fregistered">gnutls_tpm_get_registered</a> (gnutls_tpm_key_list_t * <var>list</var>)</code></dt>
<dt><code><var>void</var> <a href="TPM-API.html#gnutls_005ftpm_005fkey_005flist_005fdeinit">gnutls_tpm_key_list_deinit</a> (gnutls_tpm_key_list_t <var>list</var>)</code></dt>
<dt><code><var>int</var> <a href="TPM-API.html#gnutls_005ftpm_005fkey_005flist_005fget_005furl">gnutls_tpm_key_list_get_url</a> (gnutls_tpm_key_list_t <var>list</var>, unsigned int <var>idx</var>, char ** <var>url</var>, unsigned int <var>flags</var>)</code></dt>
</dl>
<dl>
<dt><a name="index-gnutls_005ftpm_005fprivkey_005fdelete"></a>Function: <em>int</em> <strong>gnutls_tpm_privkey_delete</strong> <em>(const char * <var>url</var>, const char * <var>srk_password</var>)</em></dt>
<dd><p><var>url</var>: the URL describing the key
</p>
<p><var>srk_password</var>: a password for the SRK key
</p>
<p>This function will unregister the private key from the TPM
chip.
</p>
<p><strong>Returns:</strong> On success, <code>GNUTLS_E_SUCCESS</code> (0) is returned, otherwise a
negative error value.
</p>
<p><strong>Since:</strong> 3.1.0
</p></dd></dl>
<hr>
<div class="header">
<p>
Next: <a href="Using-keys.html#Using-keys" accesskey="n" rel="next">Using keys</a>, Previous: <a href="Keys-in-TPM.html#Keys-in-TPM" accesskey="p" rel="prev">Keys in TPM</a>, Up: <a href="Trusted-Platform-Module.html#Trusted-Platform-Module" accesskey="u" rel="up">Trusted Platform Module</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Function-and-Data-Index.html#Function-and-Data-Index" title="Index" rel="index">Index</a>]</p>
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