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1 | =pod |
2 | ||
3 | =head1 NAME | |
4 | ||
5 | RSA_set0_key, RSA_set0_factors, RSA_set0_crt_params, RSA_get0_key, | |
6 | RSA_get0_factors, RSA_get0_crt_params, RSA_clear_flags, | |
7 | RSA_test_flags, RSA_set_flags, RSA_get0_engine - Routines for getting | |
8 | and setting data in an RSA object | |
9 | ||
10 | =head1 SYNOPSIS | |
11 | ||
12 | #include <openssl/rsa.h> | |
13 | ||
14 | int RSA_set0_key(RSA *r, BIGNUM *n, BIGNUM *e, BIGNUM *d); | |
15 | int RSA_set0_factors(RSA *r, BIGNUM *p, BIGNUM *q); | |
16 | int RSA_set0_crt_params(RSA *r,BIGNUM *dmp1, BIGNUM *dmq1, BIGNUM *iqmp); | |
17 | void RSA_get0_key(const RSA *r, BIGNUM **n, BIGNUM **e, BIGNUM **d); | |
18 | void RSA_get0_factors(const RSA *r, BIGNUM **p, BIGNUM **q); | |
19 | void RSA_get0_crt_params(const RSA *r, | |
20 | BIGNUM **dmp1, BIGNUM **dmq1, BIGNUM **iqmp); | |
21 | void RSA_clear_flags(RSA *r, int flags); | |
22 | int RSA_test_flags(const RSA *r, int flags); | |
23 | void RSA_set_flags(RSA *r, int flags); | |
24 | ENGINE *RSA_get0_engine(RSA *r); | |
25 | ||
26 | =head1 DESCRIPTION | |
27 | ||
28 | An RSA object contains the components for the public and private key, | |
29 | B<n>, B<e>, B<d>, B<p>, B<q>, B<dmp1>, B<dmq1> and B<iqmp>. B<n> is | |
30 | the modulus common to both public and private key, B<e> is the public | |
31 | exponent and B<d> is the private exponent. B<p>, B<q>, B<dmp1>, | |
32 | B<dmq1> and B<iqmp> are the factors for the second representation of a | |
33 | private key (see PKCS#1 section 3 Key Types), where B<p> and B<q> are | |
34 | the first and second factor of B<n> and B<dmp1>, B<dmq1> and B<iqmp> | |
35 | are the exponents and coefficient for CRT calculations. | |
36 | ||
37 | The B<n>, B<e> and B<d> parameters can be obtained by calling | |
38 | RSA_get0_key(). If they have not been set yet, then B<*n>, B<*e> and | |
39 | B<*d> will be set to NULL. Otherwise, they are set to pointers to | |
40 | their respective values. These point directly to the internal | |
41 | representations of the values and therefore should not be freed | |
42 | by the caller. | |
43 | ||
44 | The B<n>, B<e> and B<d> parameter values can be set by calling | |
45 | RSA_set0_key() and passing the new values for B<n>, B<e> and B<d> as | |
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46 | parameters to the function. The values B<n> and B<e> must be non-NULL |
47 | the first time this function is called on a given RSA object. The | |
48 | value B<d> may be NULL. On subsequent calls any of these values may be | |
49 | NULL which means the corresponding RSA field is left untouched. | |
50 | Calling this function transfers the memory management of the values to | |
51 | the RSA object, and therefore the values that have been passed in | |
52 | should not be freed by the caller after this function has been called. | |
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53 | |
54 | In a similar fashion, the B<p> and B<q> parameters can be obtained and | |
55 | set with RSA_get0_factors() and RSA_set0_factors(), and the B<dmp1>, | |
56 | B<dmq1> and B<iqmp> parameters can be obtained and set with | |
57 | RSA_get0_crt_params() and RSA_set0_crt_params(). | |
58 | ||
59 | RSA_set_flags() sets the flags in the B<flags> parameter on the RSA | |
60 | object. Multiple flags can be passed in one go (bitwise ORed together). | |
61 | Any flags that are already set are left set. RSA_test_flags() tests to | |
62 | see whether the flags passed in the B<flags> parameter are currently | |
63 | set in the RSA object. Multiple flags can be tested in one go. All | |
64 | flags that are currently set are returned, or zero if none of the | |
65 | flags are set. RSA_clear_flags() clears the specified flags within the | |
66 | RSA object. | |
67 | ||
68 | RSA_get0_engine() returns a handle to the ENGINE that has been set for | |
69 | this RSA object, or NULL if no such ENGINE has been set. | |
70 | ||
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71 | =head1 NOTES |
72 | ||
73 | Values retrieved with RSA_get0_key() are owned by the RSA object used | |
74 | in the call and may therefore I<not> be passed to RSA_set0_key(). If | |
75 | needed, duplicate the received value using BN_dup() and pass the | |
76 | duplicate. The same applies to RSA_get0_factors() and RSA_set0_factors() | |
77 | as well as RSA_get0_crt_params() and RSA_set0_crt_params(). | |
78 | ||
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79 | =head1 RETURN VALUES |
80 | ||
81 | RSA_set0_key(), RSA_set0_factors and RSA_set0_crt_params() return 1 on | |
82 | success or 0 on failure. | |
83 | ||
84 | RSA_test_flags() returns the current state of the flags in the RSA object. | |
85 | ||
86 | RSA_get0_engine() returns the ENGINE set for the RSA object or NULL if no | |
87 | ENGINE has been set. | |
88 | ||
89 | =head1 SEE ALSO | |
90 | ||
91 | L<rsa(3)>, L<RSA_new(3)>, L<RSA_size(3)> | |
92 | ||
93 | =head1 HISTORY | |
94 | ||
95 | The functions described here were added in OpenSSL version 1.1.0. | |
96 | ||
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97 | =head1 COPYRIGHT |
98 | ||
99 | Copyright 2016 The OpenSSL Project Authors. All Rights Reserved. | |
100 | ||
101 | Licensed under the OpenSSL license (the "License"). You may not use | |
102 | this file except in compliance with the License. You can obtain a copy | |
103 | in the file LICENSE in the source distribution or at | |
104 | L<https://www.openssl.org/source/license.html>. | |
105 | ||
106 | =cut |