RSA_GET0_KEY(3ossl) OpenSSL RSA_GET0_KEY(3ossl)
NAME
RSA_set0_key, RSA_set0_factors, RSA_set0_crt_params, RSA_get0_key,
RSA_get0_factors, RSA_get0_crt_params, RSA_get0_n, RSA_get0_e,
RSA_get0_d, RSA_get0_p, RSA_get0_q, RSA_get0_dmp1, RSA_get0_dmq1,
RSA_get0_iqmp, RSA_get0_pss_params, RSA_clear_flags, RSA_test_flags,
RSA_set_flags, RSA_get0_engine, RSA_get_multi_prime_extra_count,
RSA_get0_multi_prime_factors, RSA_get0_multi_prime_crt_params,
RSA_set0_multi_prime_params, RSA_get_version - Routines for getting and
setting data in an RSA object
SYNOPSIS
#include <openssl/rsa.h>
The following functions have been deprecated since OpenSSL 3.0, and can
be hidden entirely by defining OPENSSL_API_COMPAT with a suitable
version value, see openssl_user_macros(7):
int RSA_set0_key(RSA *r, BIGNUM *n, BIGNUM *e, BIGNUM *d);
int RSA_set0_factors(RSA *r, BIGNUM *p, BIGNUM *q);
int RSA_set0_crt_params(RSA *r, BIGNUM *dmp1, BIGNUM *dmq1, BIGNUM *iqmp);
void RSA_get0_key(const RSA *r,
const BIGNUM **n, const BIGNUM **e, const BIGNUM **d);
void RSA_get0_factors(const RSA *r, const BIGNUM **p, const BIGNUM **q);
void RSA_get0_crt_params(const RSA *r,
const BIGNUM **dmp1, const BIGNUM **dmq1,
const BIGNUM **iqmp);
const BIGNUM *RSA_get0_n(const RSA *d);
const BIGNUM *RSA_get0_e(const RSA *d);
const BIGNUM *RSA_get0_d(const RSA *d);
const BIGNUM *RSA_get0_p(const RSA *d);
const BIGNUM *RSA_get0_q(const RSA *d);
const BIGNUM *RSA_get0_dmp1(const RSA *r);
const BIGNUM *RSA_get0_dmq1(const RSA *r);
const BIGNUM *RSA_get0_iqmp(const RSA *r);
const RSA_PSS_PARAMS *RSA_get0_pss_params(const RSA *r);
void RSA_clear_flags(RSA *r, int flags);
int RSA_test_flags(const RSA *r, int flags);
void RSA_set_flags(RSA *r, int flags);
ENGINE *RSA_get0_engine(RSA *r);
int RSA_get_multi_prime_extra_count(const RSA *r);
int RSA_get0_multi_prime_factors(const RSA *r, const BIGNUM *primes[]);
int RSA_get0_multi_prime_crt_params(const RSA *r, const BIGNUM *exps[],
const BIGNUM *coeffs[]);
int RSA_set0_multi_prime_params(RSA *r, BIGNUM *primes[], BIGNUM *exps[],
BIGNUM *coeffs[], int pnum);
int RSA_get_version(RSA *r);
DESCRIPTION
All of the functions described on this page are deprecated.
Applications should instead use EVP_PKEY_get_bn_param(3) for any
methods that return a BIGNUM. Refer to EVP_PKEY-DH(7) for more
information.
An RSA object contains the components for the public and private key,
n, e, d, p, q, dmp1, dmq1 and iqmp. n is the modulus common to both
public and private key, e is the public exponent and d is the private
exponent. p, q, dmp1, dmq1 and iqmp are the factors for the second
representation of a private key (see PKCS#1 section 3 Key Types), where
p and q are the first and second factor of n and dmp1, dmq1 and iqmp
are the exponents and coefficient for CRT calculations.
For multi-prime RSA (defined in RFC 8017), there are also one or more
'triplet' in an RSA object. A triplet contains three members, r, d and
t. r is the additional prime besides p and q. d and t are the exponent
and coefficient for CRT calculations.
The RSA_get0_key(3).
If they have not been set yet, then *n, *e and *d will be set to NULL.
Otherwise, they are set to pointers to their respective values. These
point directly to the internal representations of the values and
therefore should not be freed by the caller.
The n, e and d parameter values can be set by calling RSA_set0_key()
and passing the new values for n, e and d as parameters to the
function. The values n and e must be non-NULL the first time this
function is called on a given RSA object. The value d may be NULL. On
subsequent calls any of these values may be NULL which means the
corresponding RSA field is left untouched. Calling this function
transfers the memory management of the values to the RSA object, and
therefore the values that have been passed in should not be freed by
the caller after this function has been called.
In a similar fashion, the p and q parameters can be obtained and set
with RSA_get0_factors() and RSA_set0_factors(), and the dmp1, dmq1 and
iqmp parameters can be obtained and set with RSA_get0_crt_params() and
RSA_set0_crt_params().
For RSA_get0_key(3), RSA_get0_factors(), and RSA_get0_crt_params(), NULL
value BIGNUM ** output parameters are permitted. The functions ignore
NULL parameters but return values for other, non-NULL, parameters.
For multi-prime RSA, RSA_get0_multi_prime_factors() and
RSA_get0_multi_prime_params() can be used to obtain other primes and
related CRT parameters. The return values are stored in an array of
BIGNUM *. RSA_set0_multi_prime_params() sets a collect of multi-prime
'triplet' members (prime, exponent and coefficient) into an RSA object.
Any of the values n, e, d, p, q, dmp1, dmq1, and iqmp can also be
retrieved separately by the corresponding function RSA_get0_n(),
RSA_get0_e(), RSA_get0_d(), RSA_get0_p(), RSA_get0_q(),
RSA_get0_dmp1(), RSA_get0_dmq1(), and RSA_get0_iqmp(), respectively.
RSA_get0_pss_params() is used to retrieve the RSA-PSS parameters.
RSA_set_flags() sets the flags in the flags parameter on the RSA
object. Multiple flags can be passed in one go (bitwise ORed together).
Any flags that are already set are left set. RSA_test_flags() tests to
see whether the flags passed in the flags parameter are currently set
in the RSA object. Multiple flags can be tested in one go. All flags
that are currently set are returned, or zero if none of the flags are
set. RSA_clear_flags() clears the specified flags within the RSA
object.
RSA_get0_engine() returns a handle to the ENGINE that has been set for
this RSA object, or NULL if no such ENGINE has been set.
RSA_get_version() returns the version of an RSA object r.
NOTES
Values retrieved with RSA_get0_key(3) are owned by the RSA object used
in the call and may therefore not be passed to RSA_set0_key(). If
needed, duplicate the received value using BN_dup() and pass the
duplicate. The same applies to RSA_get0_factors() and
RSA_set0_factors() as well as RSA_get0_crt_params() and
RSA_set0_crt_params().
The caller should obtain the size by calling
RSA_get_multi_prime_extra_count() in advance and allocate sufficient
buffer to store the return values before calling
RSA_get0_multi_prime_factors() and RSA_get0_multi_prime_params().
RSA_set0_multi_prime_params() always clears the original multi-prime
triplets in RSA object r and assign the new set of triplets into it.
RETURN VALUES
RSA_set0_key(), RSA_set0_factors(), RSA_set0_crt_params() and
RSA_set0_multi_prime_params() return 1 on success or 0 on failure.
RSA_get0_n(), RSA_get0_e(), RSA_get0_d(), RSA_get0_p(), RSA_get0_q(),
RSA_get0_dmp1(), RSA_get0_dmq1(), and RSA_get0_iqmp() return the
respective value.
RSA_get0_pss_params() returns a RSA_PSS_PARAMS pointer, or NULL if
there is none.
RSA_get0_multi_prime_factors() and RSA_get0_multi_prime_crt_params()
return 1 on success or 0 on failure.
RSA_get_multi_prime_extra_count() returns two less than the number of
primes in use, which is 0 for traditional RSA and the number of extra
primes for multi-prime RSA.
RSA_get_version() returns RSA_ASN1_VERSION_MULTI for multi-prime RSA
and RSA_ASN1_VERSION_DEFAULT for normal two-prime RSA, as defined in
RFC 8017.
RSA_test_flags() returns the current state of the flags in the RSA
object.
RSA_get0_engine() returns the ENGINE set for the RSA object or NULL if
no ENGINE has been set.
SEE ALSO
RSA_new(3), RSA_size(3)
HISTORY
The RSA_get0_pss_params() function was added in OpenSSL 1.1.1e.
The RSA_get_multi_prime_extra_count(), RSA_get0_multi_prime_factors(),
RSA_get0_multi_prime_crt_params(), RSA_set0_multi_prime_params(), and
RSA_get_version() functions were added in OpenSSL 1.1.1.
Other functions described here were added in OpenSSL 1.1.0.
All of these functions were deprecated in OpenSSL 3.0.
COPYRIGHT
Copyright 2016-2022 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the Apache License 2.0 (the "License"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file LICENSE in the source distribution or at
<https://www.openssl.org/source/license.html>.
3.3.2 2024-09-04 RSA_GET0_KEY(3ossl)
openssl 3.3.2 - Generated Thu Sep 19 18:34:23 CDT 2024