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.\" DO NOT MODIFY THIS FILE! It was generated by gdoc.
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.TH "gnutls_privkey_import_ext4" 3 "3.6.14" "gnutls" "gnutls"
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.SH NAME
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gnutls_privkey_import_ext4 \- API function
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.SH SYNOPSIS
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.B #include <gnutls/abstract.h>
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.sp
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.BI "int gnutls_privkey_import_ext4(gnutls_privkey_t " pkey ", void * " userdata ", gnutls_privkey_sign_data_func " sign_data_fn ", gnutls_privkey_sign_hash_func " sign_hash_fn ", gnutls_privkey_decrypt_func " decrypt_fn ", gnutls_privkey_deinit_func " deinit_fn ", gnutls_privkey_info_func " info_fn ", unsigned int " flags ");"
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.SH ARGUMENTS
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.IP "gnutls_privkey_t pkey" 12
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The private key
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.IP "void * userdata" 12
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private data to be provided to the callbacks
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.IP "gnutls_privkey_sign_data_func sign_data_fn" 12
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callback for signature operations (may be \fBNULL\fP)
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.IP "gnutls_privkey_sign_hash_func sign_hash_fn" 12
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callback for signature operations (may be \fBNULL\fP)
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.IP "gnutls_privkey_decrypt_func decrypt_fn" 12
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callback for decryption operations (may be \fBNULL\fP)
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.IP "gnutls_privkey_deinit_func deinit_fn" 12
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a deinitialization function
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.IP "gnutls_privkey_info_func info_fn" 12
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returns info about the public key algorithm (should not be \fBNULL\fP)
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.IP "unsigned int flags" 12
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Flags for the import
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.SH "DESCRIPTION"
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This function will associate the given callbacks with the
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\fBgnutls_privkey_t\fP type. At least one of the callbacks
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must be non\-null. If a deinitialization function is provided
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then flags is assumed to contain \fBGNUTLS_PRIVKEY_IMPORT_AUTO_RELEASE\fP.
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Note that in contrast with the signing function of
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\fBgnutls_privkey_import_ext3()\fP, the signing functions provided to this
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function take explicitly the signature algorithm as parameter and
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different functions are provided to sign the data and hashes.
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The \fIsign_hash_fn\fP is to be called to sign pre\-hashed data. The input
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to the callback is the output of the hash (such as SHA256) corresponding
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to the signature algorithm. For RSA PKCS\fB1\fP signatures, the signature
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algorithm can be set to \fBGNUTLS_SIGN_RSA_RAW\fP, and in that case the data
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should be handled as if they were an RSA PKCS\fB1\fP DigestInfo structure.
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The \fIsign_data_fn\fP is to be called to sign data. The input data will be
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he data to be signed (and hashed), with the provided signature
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algorithm. This function is to be used for signature algorithms like
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Ed25519 which cannot take pre\-hashed data as input.
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When both \fIsign_data_fn\fP and \fIsign_hash_fn\fP functions are provided they
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must be able to operate on all the supported signature algorithms,
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unless prohibited by the type of the algorithm (e.g., as with Ed25519).
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The \fIinfo_fn\fP must provide information on the signature algorithms supported by
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this private key, and should support the flags \fBGNUTLS_PRIVKEY_INFO_PK_ALGO\fP,
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\fBGNUTLS_PRIVKEY_INFO_HAVE_SIGN_ALGO\fP and \fBGNUTLS_PRIVKEY_INFO_PK_ALGO_BITS\fP.
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It must return \-1 on unknown flags.
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.SH "RETURNS"
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On success, \fBGNUTLS_E_SUCCESS\fP (0) is returned, otherwise a
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negative error value.
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.SH "SINCE"
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3.6.0
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.SH "REPORTING BUGS"
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Report bugs to <bugs@gnutls.org>.
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.br
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Home page: https://www.gnutls.org
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.SH COPYRIGHT
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Copyright \(co 2001- Free Software Foundation, Inc., and others.
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.br
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Copying and distribution of this file, with or without modification,
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are permitted in any medium without royalty provided the copyright
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notice and this notice are preserved.
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.SH "SEE ALSO"
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The full documentation for
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.B gnutls
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is maintained as a Texinfo manual.
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If the /usr/share/doc/gnutls/
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directory does not contain the HTML form visit
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.B
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.IP https://www.gnutls.org/manual/
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.PP
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