320 lines
12 KiB
Groff
Executable File
320 lines
12 KiB
Groff
Executable File
.\" Automatically generated by Pod::Man 2.25 (Pod::Simple 3.16)
|
|
.\"
|
|
.\" Standard preamble:
|
|
.\" ========================================================================
|
|
.de Sp \" Vertical space (when we can't use .PP)
|
|
.if t .sp .5v
|
|
.if n .sp
|
|
..
|
|
.de Vb \" Begin verbatim text
|
|
.ft CW
|
|
.nf
|
|
.ne \\$1
|
|
..
|
|
.de Ve \" End verbatim text
|
|
.ft R
|
|
.fi
|
|
..
|
|
.\" Set up some character translations and predefined strings. \*(-- will
|
|
.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left
|
|
.\" double quote, and \*(R" will give a right double quote. \*(C+ will
|
|
.\" give a nicer C++. Capital omega is used to do unbreakable dashes and
|
|
.\" therefore won't be available. \*(C` and \*(C' expand to `' in nroff,
|
|
.\" nothing in troff, for use with C<>.
|
|
.tr \(*W-
|
|
.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p'
|
|
.ie n \{\
|
|
. ds -- \(*W-
|
|
. ds PI pi
|
|
. if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch
|
|
. if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch
|
|
. ds L" ""
|
|
. ds R" ""
|
|
. ds C` ""
|
|
. ds C' ""
|
|
'br\}
|
|
.el\{\
|
|
. ds -- \|\(em\|
|
|
. ds PI \(*p
|
|
. ds L" ``
|
|
. ds R" ''
|
|
'br\}
|
|
.\"
|
|
.\" Escape single quotes in literal strings from groff's Unicode transform.
|
|
.ie \n(.g .ds Aq \(aq
|
|
.el .ds Aq '
|
|
.\"
|
|
.\" If the F register is turned on, we'll generate index entries on stderr for
|
|
.\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
|
|
.\" entries marked with X<> in POD. Of course, you'll have to process the
|
|
.\" output yourself in some meaningful fashion.
|
|
.ie \nF \{\
|
|
. de IX
|
|
. tm Index:\\$1\t\\n%\t"\\$2"
|
|
..
|
|
. nr % 0
|
|
. rr F
|
|
.\}
|
|
.el \{\
|
|
. de IX
|
|
..
|
|
.\}
|
|
.\"
|
|
.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
|
|
.\" Fear. Run. Save yourself. No user-serviceable parts.
|
|
. \" fudge factors for nroff and troff
|
|
.if n \{\
|
|
. ds #H 0
|
|
. ds #V .8m
|
|
. ds #F .3m
|
|
. ds #[ \f1
|
|
. ds #] \fP
|
|
.\}
|
|
.if t \{\
|
|
. ds #H ((1u-(\\\\n(.fu%2u))*.13m)
|
|
. ds #V .6m
|
|
. ds #F 0
|
|
. ds #[ \&
|
|
. ds #] \&
|
|
.\}
|
|
. \" simple accents for nroff and troff
|
|
.if n \{\
|
|
. ds ' \&
|
|
. ds ` \&
|
|
. ds ^ \&
|
|
. ds , \&
|
|
. ds ~ ~
|
|
. ds /
|
|
.\}
|
|
.if t \{\
|
|
. ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u"
|
|
. ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u'
|
|
. ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u'
|
|
. ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u'
|
|
. ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u'
|
|
. ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u'
|
|
.\}
|
|
. \" troff and (daisy-wheel) nroff accents
|
|
.ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V'
|
|
.ds 8 \h'\*(#H'\(*b\h'-\*(#H'
|
|
.ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#]
|
|
.ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H'
|
|
.ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u'
|
|
.ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#]
|
|
.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#]
|
|
.ds ae a\h'-(\w'a'u*4/10)'e
|
|
.ds Ae A\h'-(\w'A'u*4/10)'E
|
|
. \" corrections for vroff
|
|
.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
|
|
.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u'
|
|
. \" for low resolution devices (crt and lpr)
|
|
.if \n(.H>23 .if \n(.V>19 \
|
|
\{\
|
|
. ds : e
|
|
. ds 8 ss
|
|
. ds o a
|
|
. ds d- d\h'-1'\(ga
|
|
. ds D- D\h'-1'\(hy
|
|
. ds th \o'bp'
|
|
. ds Th \o'LP'
|
|
. ds ae ae
|
|
. ds Ae AE
|
|
.\}
|
|
.rm #[ #] #H #V #F C
|
|
.\" ========================================================================
|
|
.\"
|
|
.IX Title "RSA_SET_METHOD 3"
|
|
.TH RSA_SET_METHOD 3 "2020-03-02" "3.0.0-dev" "OpenSSL"
|
|
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
|
|
.\" way too many mistakes in technical documents.
|
|
.if n .ad l
|
|
.nh
|
|
.SH "NAME"
|
|
RSA_set_default_method, RSA_get_default_method, RSA_set_method,
|
|
RSA_get_method, RSA_PKCS1_OpenSSL, RSA_flags,
|
|
RSA_new_method \- select RSA method
|
|
.SH "SYNOPSIS"
|
|
.IX Header "SYNOPSIS"
|
|
.Vb 1
|
|
\& #include <openssl/rsa.h>
|
|
.Ve
|
|
.PP
|
|
Deprecated since OpenSSL 3.0, can be hidden entirely by defining
|
|
\&\fB\s-1OPENSSL_API_COMPAT\s0\fR with a suitable version value, see
|
|
\&\fIopenssl_user_macros\fR\|(7):
|
|
.PP
|
|
.Vb 1
|
|
\& void RSA_set_default_method(const RSA_METHOD *meth);
|
|
\&
|
|
\& RSA_METHOD *RSA_get_default_method(void);
|
|
\&
|
|
\& int RSA_set_method(RSA *rsa, const RSA_METHOD *meth);
|
|
\&
|
|
\& RSA_METHOD *RSA_get_method(const RSA *rsa);
|
|
\&
|
|
\& RSA_METHOD *RSA_PKCS1_OpenSSL(void);
|
|
\&
|
|
\& int RSA_flags(const RSA *rsa);
|
|
\&
|
|
\& RSA *RSA_new_method(ENGINE *engine);
|
|
.Ve
|
|
.SH "DESCRIPTION"
|
|
.IX Header "DESCRIPTION"
|
|
All of the functions described on this page are deprecated.
|
|
Applications should instead use the \s-1OSSL_PROVIDER\s0 APIs.
|
|
.PP
|
|
An \fB\s-1RSA_METHOD\s0\fR specifies the functions that OpenSSL uses for \s-1RSA\s0
|
|
operations. By modifying the method, alternative implementations such as
|
|
hardware accelerators may be used. \s-1IMPORTANT:\s0 See the \s-1NOTES\s0 section for
|
|
important information about how these \s-1RSA\s0 \s-1API\s0 functions are affected by the
|
|
use of \fB\s-1ENGINE\s0\fR \s-1API\s0 calls.
|
|
.PP
|
|
Initially, the default \s-1RSA_METHOD\s0 is the OpenSSL internal implementation,
|
|
as returned by \fIRSA_PKCS1_OpenSSL()\fR.
|
|
.PP
|
|
\&\fIRSA_set_default_method()\fR makes \fBmeth\fR the default method for all \s-1RSA\s0
|
|
structures created later.
|
|
\&\fB\s-1NB\s0\fR: This is true only whilst no \s-1ENGINE\s0 has
|
|
been set as a default for \s-1RSA\s0, so this function is no longer recommended.
|
|
This function is not thread-safe and should not be called at the same time
|
|
as other OpenSSL functions.
|
|
.PP
|
|
\&\fIRSA_get_default_method()\fR returns a pointer to the current default
|
|
\&\s-1RSA_METHOD\s0. However, the meaningfulness of this result is dependent on
|
|
whether the \s-1ENGINE\s0 \s-1API\s0 is being used, so this function is no longer
|
|
recommended.
|
|
.PP
|
|
\&\fIRSA_set_method()\fR selects \fBmeth\fR to perform all operations using the key
|
|
\&\fBrsa\fR. This will replace the \s-1RSA_METHOD\s0 used by the \s-1RSA\s0 key and if the
|
|
previous method was supplied by an \s-1ENGINE\s0, the handle to that \s-1ENGINE\s0 will
|
|
be released during the change. It is possible to have \s-1RSA\s0 keys that only
|
|
work with certain \s-1RSA_METHOD\s0 implementations (eg. from an \s-1ENGINE\s0 module
|
|
that supports embedded hardware-protected keys), and in such cases
|
|
attempting to change the \s-1RSA_METHOD\s0 for the key can have unexpected
|
|
results.
|
|
.PP
|
|
\&\fIRSA_get_method()\fR returns a pointer to the \s-1RSA_METHOD\s0 being used by \fBrsa\fR.
|
|
This method may or may not be supplied by an \s-1ENGINE\s0 implementation, but if
|
|
it is, the return value can only be guaranteed to be valid as long as the
|
|
\&\s-1RSA\s0 key itself is valid and does not have its implementation changed by
|
|
\&\fIRSA_set_method()\fR.
|
|
.PP
|
|
\&\fIRSA_flags()\fR returns the \fBflags\fR that are set for \fBrsa\fR's current
|
|
\&\s-1RSA_METHOD\s0. See the \s-1BUGS\s0 section.
|
|
.PP
|
|
\&\fIRSA_new_method()\fR allocates and initializes an \s-1RSA\s0 structure so that
|
|
\&\fBengine\fR will be used for the \s-1RSA\s0 operations. If \fBengine\fR is \s-1NULL\s0, the
|
|
default \s-1ENGINE\s0 for \s-1RSA\s0 operations is used, and if no default \s-1ENGINE\s0 is set,
|
|
the \s-1RSA_METHOD\s0 controlled by \fIRSA_set_default_method()\fR is used.
|
|
.PP
|
|
\&\fIRSA_flags()\fR returns the \fBflags\fR that are set for \fBrsa\fR's current method.
|
|
.PP
|
|
\&\fIRSA_new_method()\fR allocates and initializes an \fB\s-1RSA\s0\fR structure so that
|
|
\&\fBmethod\fR will be used for the \s-1RSA\s0 operations. If \fBmethod\fR is \fB\s-1NULL\s0\fR,
|
|
the default method is used.
|
|
.SH "THE RSA_METHOD STRUCTURE"
|
|
.IX Header "THE RSA_METHOD STRUCTURE"
|
|
.Vb 4
|
|
\& typedef struct rsa_meth_st
|
|
\& {
|
|
\& /* name of the implementation */
|
|
\& const char *name;
|
|
\&
|
|
\& /* encrypt */
|
|
\& int (*rsa_pub_enc)(int flen, unsigned char *from,
|
|
\& unsigned char *to, RSA *rsa, int padding);
|
|
\&
|
|
\& /* verify arbitrary data */
|
|
\& int (*rsa_pub_dec)(int flen, unsigned char *from,
|
|
\& unsigned char *to, RSA *rsa, int padding);
|
|
\&
|
|
\& /* sign arbitrary data */
|
|
\& int (*rsa_priv_enc)(int flen, unsigned char *from,
|
|
\& unsigned char *to, RSA *rsa, int padding);
|
|
\&
|
|
\& /* decrypt */
|
|
\& int (*rsa_priv_dec)(int flen, unsigned char *from,
|
|
\& unsigned char *to, RSA *rsa, int padding);
|
|
\&
|
|
\& /* compute r0 = r0 ^ I mod rsa\->n (May be NULL for some implementations) */
|
|
\& int (*rsa_mod_exp)(BIGNUM *r0, BIGNUM *I, RSA *rsa);
|
|
\&
|
|
\& /* compute r = a ^ p mod m (May be NULL for some implementations) */
|
|
\& int (*bn_mod_exp)(BIGNUM *r, BIGNUM *a, const BIGNUM *p,
|
|
\& const BIGNUM *m, BN_CTX *ctx, BN_MONT_CTX *m_ctx);
|
|
\&
|
|
\& /* called at RSA_new */
|
|
\& int (*init)(RSA *rsa);
|
|
\&
|
|
\& /* called at RSA_free */
|
|
\& int (*finish)(RSA *rsa);
|
|
\&
|
|
\& /*
|
|
\& * RSA_FLAG_EXT_PKEY \- rsa_mod_exp is called for private key
|
|
\& * operations, even if p,q,dmp1,dmq1,iqmp
|
|
\& * are NULL
|
|
\& * RSA_METHOD_FLAG_NO_CHECK \- don\*(Aqt check pub/private match
|
|
\& */
|
|
\& int flags;
|
|
\&
|
|
\& char *app_data; /* ?? */
|
|
\&
|
|
\& int (*rsa_sign)(int type,
|
|
\& const unsigned char *m, unsigned int m_length,
|
|
\& unsigned char *sigret, unsigned int *siglen, const RSA *rsa);
|
|
\& int (*rsa_verify)(int dtype,
|
|
\& const unsigned char *m, unsigned int m_length,
|
|
\& const unsigned char *sigbuf, unsigned int siglen,
|
|
\& const RSA *rsa);
|
|
\& /* keygen. If NULL built\-in RSA key generation will be used */
|
|
\& int (*rsa_keygen)(RSA *rsa, int bits, BIGNUM *e, BN_GENCB *cb);
|
|
\&
|
|
\& } RSA_METHOD;
|
|
.Ve
|
|
.SH "RETURN VALUES"
|
|
.IX Header "RETURN VALUES"
|
|
\&\fIRSA_PKCS1_OpenSSL()\fR, \fIRSA_PKCS1_null_method()\fR, \fIRSA_get_default_method()\fR
|
|
and \fIRSA_get_method()\fR return pointers to the respective RSA_METHODs.
|
|
.PP
|
|
\&\fIRSA_set_default_method()\fR returns no value.
|
|
.PP
|
|
\&\fIRSA_set_method()\fR returns a pointer to the old \s-1RSA_METHOD\s0 implementation
|
|
that was replaced. However, this return value should probably be ignored
|
|
because if it was supplied by an \s-1ENGINE\s0, the pointer could be invalidated
|
|
at any time if the \s-1ENGINE\s0 is unloaded (in fact it could be unloaded as a
|
|
result of the \fIRSA_set_method()\fR function releasing its handle to the
|
|
\&\s-1ENGINE\s0). For this reason, the return type may be replaced with a \fBvoid\fR
|
|
declaration in a future release.
|
|
.PP
|
|
\&\fIRSA_new_method()\fR returns \s-1NULL\s0 and sets an error code that can be obtained
|
|
by \fIERR_get_error\fR\|(3) if the allocation fails. Otherwise
|
|
it returns a pointer to the newly allocated structure.
|
|
.SH "BUGS"
|
|
.IX Header "BUGS"
|
|
The behaviour of \fIRSA_flags()\fR is a mis-feature that is left as-is for now
|
|
to avoid creating compatibility problems. \s-1RSA\s0 functionality, such as the
|
|
encryption functions, are controlled by the \fBflags\fR value in the \s-1RSA\s0 key
|
|
itself, not by the \fBflags\fR value in the \s-1RSA_METHOD\s0 attached to the \s-1RSA\s0 key
|
|
(which is what this function returns). If the flags element of an \s-1RSA\s0 key
|
|
is changed, the changes will be honoured by \s-1RSA\s0 functionality but will not
|
|
be reflected in the return value of the \fIRSA_flags()\fR function \- in effect
|
|
\&\fIRSA_flags()\fR behaves more like an \fIRSA_default_flags()\fR function (which does
|
|
not currently exist).
|
|
.SH "SEE ALSO"
|
|
.IX Header "SEE ALSO"
|
|
\&\fIRSA_new\fR\|(3)
|
|
.SH "HISTORY"
|
|
.IX Header "HISTORY"
|
|
All of these functions were deprecated in OpenSSL 3.0.
|
|
.PP
|
|
The \fIRSA_null_method()\fR, which was a partial attempt to avoid patent issues,
|
|
was replaced to always return \s-1NULL\s0 in OpenSSL 1.1.1.
|
|
.SH "COPYRIGHT"
|
|
.IX Header "COPYRIGHT"
|
|
Copyright 2000\-2016 The OpenSSL Project Authors. All Rights Reserved.
|
|
.PP
|
|
Licensed under the Apache License 2.0 (the \*(L"License\*(R"). You may not use
|
|
this file except in compliance with the License. You can obtain a copy
|
|
in the file \s-1LICENSE\s0 in the source distribution or at
|
|
<https://www.openssl.org/source/license.html>.
|