gnutls_privkey_generate2(3) gnutls gnutls_privkey_generate2(3)
NAME
gnutls_privkey_generate2 - API function
SYNOPSIS
#include <gnutls/abstract.h>
int gnutls_privkey_generate2(gnutls_privkey_t pkey, gnutls_pk_algo-
rithm_t algo, unsigned int bits, unsigned int flags, const gnutls_key-
gen_data_st * data, unsigned data_size);
ARGUMENTS
gnutls_privkey_t pkey
The private key
gnutls_pk_algorithm_t algo
is one of the algorithms in gnutls_pk_algorithm_t.
unsigned int bits
the size of the modulus
unsigned int flags
Must be zero or flags from gnutls_privkey_flags_t.
const gnutls_keygen_data_st * data
Allow specifying gnutls_keygen_data_st types such as the
seed to be used.
unsigned data_size
The number of data available.
DESCRIPTION
This function will generate a random private key. Note that this func-
tion must be called on an initialized private key.
The flag GNUTLS_PRIVKEY_FLAG_PROVABLE instructs the key generation
process to use algorithms like Shawe-Taylor (from FIPS PUB186-4) which
generate provable parameters out of a seed for RSA and DSA keys. On DSA
keys the PQG parameters are generated using the seed, while on RSA the
two primes. To specify an explicit seed (by default a random seed is
used), use the data with a GNUTLS_KEYGEN_SEED type.
Note that when generating an elliptic curve key, the curve can be sub-
stituted in the place of the bits parameter using the
GNUTLS_CURVE_TO_BITS() macro.
To export the generated keys in memory or in files it is recommended to
use the PKCS8 form as it can handle all key types, and can store addi-
tional parameters such as the seed, in case of provable RSA or DSA keys.
Generated keys can be exported in memory using gnutls_privkey_ex-
port_x509(), and then with gnutls_x509_privkey_export2_pkcs8().
If key generation is part of your application, avoid setting the number
of bits directly, and instead use gnutls_sec_param_to_pk_bits(). That
way the generated keys will adapt to the security levels of the underly-
ing GnuTLS library.
RETURNS
On success, GNUTLS_E_SUCCESS (0) is returned, otherwise a negative error
value.
SINCE
3.5.0
REPORTING BUGS
Report bugs to <bugs@gnutls.org>.
Home page: https://www.gnutls.org
COPYRIGHT
Copyright © 2001-2023 Free Software Foundation, Inc., and others.
Copying and distribution of this file, with or without modification, are
permitted in any medium without royalty provided the copyright notice
and this notice are preserved.
SEE ALSO
The full documentation for gnutls is maintained as a Texinfo manual. If
the /usr/share/doc/gnutls/ directory does not contain the HTML form
visit
https://www.gnutls.org/manual/
gnutls 3.8.9 gnutls_privkey_generate2(3)
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