[src/trunk]: src/crypto/external/bsd/openssl/lib/libcrypto/man commit the new...

To: source-changes-hg%NetBSD.org@localhost
Subject: [src/trunk]: src/crypto/external/bsd/openssl/lib/libcrypto/man commit the new...
From: christos <christos%NetBSD.org@localhost>
Date: Tue, 07 Apr 2020 00:14:30 +0000
details:   https://anonhg.NetBSD.org/src/rev/6b30d33b40ad
branches:  trunk
changeset: 784729:6b30d33b40ad
user:      christos <christos%NetBSD.org@localhost>
date:      Thu Feb 07 17:30:08 2013 +0000

description:
commit the new man page.

diffstat:

 crypto/external/bsd/openssl/lib/libcrypto/man/EVP_PKEY_verify_recover.3 |  230 ++++++++++
 1 files changed, 230 insertions(+), 0 deletions(-)

diffs (234 lines):

diff -r 151859202c12 -r 6b30d33b40ad crypto/external/bsd/openssl/lib/libcrypto/man/EVP_PKEY_verify_recover.3
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/crypto/external/bsd/openssl/lib/libcrypto/man/EVP_PKEY_verify_recover.3   Thu Feb 07 17:30:08 2013 +0000
@@ -0,0 +1,230 @@
+.\"    $NetBSD: EVP_PKEY_verify_recover.3,v 1.1 2013/02/07 17:30:08 christos Exp $
+.\"
+.\" Automatically generated by Pod::Man 2.25 (Pod::Simple 3.20)
+.\"
+.\" Standard preamble:
+.\" ========================================================================
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+.if n .sp
+..
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+..
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+.\" 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 \{\
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+.    ds L" ""
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+'br\}
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+.    ds R" ''
+'br\}
+.\"
+.\" Escape single quotes in literal strings from groff's Unicode transform.
+.ie \n(.g .ds Aq \(aq
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+.\"
+.\" 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
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+.    nr % 0
+.    rr F
+.\}
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+.\}
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+.    \" fudge factors for nroff and troff
+.if n \{\
+.    ds #H 0
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+.\}
+.if t \{\
+.    ds #H ((1u-(\\\\n(.fu%2u))*.13m)
+.    ds #V .6m
+.    ds #F 0
+.    ds #[ \&
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+.\}
+.    \" simple accents for nroff and troff
+.if n \{\
+.    ds ' \&
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+.    ds ^ \&
+.    ds , \&
+.    ds ~ ~
+.    ds /
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+.if t \{\
+.    ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u"
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+.    ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u'
+.    ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u'
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+.    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'
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+.ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#]
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+.ds ae a\h'-(\w'a'u*4/10)'e
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+.    \" corrections for vroff
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+.    \" for low resolution devices (crt and lpr)
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+\{\
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+.rm #[ #] #H #V #F C
+.\" ========================================================================
+.\"
+.IX Title "EVP_PKEY_verify_recover 3"
+.TH EVP_PKEY_verify_recover 3 "2013-02-05" "1.0.1d" "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"
+EVP_PKEY_verify_recover_init, EVP_PKEY_verify_recover \- recover signature using a public key algorithm
+.SH "LIBRARY"
+libcrypto, -lcrypto
+.SH "SYNOPSIS"
+.IX Header "SYNOPSIS"
+.Vb 1
+\& #include <openssl/evp.h>
+\&
+\& int EVP_PKEY_verify_recover_init(EVP_PKEY_CTX *ctx);
+\& int EVP_PKEY_verify_recover(EVP_PKEY_CTX *ctx,
+\&                        unsigned char *rout, size_t *routlen,
+\&                        const unsigned char *sig, size_t siglen);
+.Ve
+.SH "DESCRIPTION"
+.IX Header "DESCRIPTION"
+The \fIEVP_PKEY_verify_recover_init()\fR function initializes a public key algorithm
+context using key \fBpkey\fR for a verify recover operation.
+.PP
+The \fIEVP_PKEY_verify_recover()\fR function recovers signed data
+using \fBctx\fR. The signature is specified using the \fBsig\fR and
+\&\fBsiglen\fR parameters. If \fBrout\fR is \fB\s-1NULL\s0\fR then the maximum size of the output
+buffer is written to the \fBroutlen\fR parameter. If \fBrout\fR is not \fB\s-1NULL\s0\fR then
+before the call the \fBroutlen\fR parameter should contain the length of the
+\&\fBrout\fR buffer, if the call is successful recovered data is written to
+\&\fBrout\fR and the amount of data written to \fBroutlen\fR.
+.SH "NOTES"
+.IX Header "NOTES"
+Normally an application is only interested in whether a signature verification
+operation is successful in those cases the \fIEVP_verify()\fR function should be
+used.
+.PP
+Sometimes however it is useful to obtain the data originally signed using a
+signing operation. Only certain public key algorithms can recover a signature
+in this way (for example \s-1RSA\s0 in \s-1PKCS\s0 padding mode).
+.PP
+After the call to \fIEVP_PKEY_verify_recover_init()\fR algorithm specific control
+operations can be performed to set any appropriate parameters for the
+operation.
+.PP
+The function \fIEVP_PKEY_verify_recover()\fR can be called more than once on the same
+context if several operations are performed using the same parameters.
+.SH "RETURN VALUES"
+.IX Header "RETURN VALUES"
+\&\fIEVP_PKEY_verify_recover_init()\fR and \fIEVP_PKEY_verify_recover()\fR return 1 for success
+and 0 or a negative value for failure. In particular a return value of \-2
+indicates the operation is not supported by the public key algorithm.
+.SH "EXAMPLE"
+.IX Header "EXAMPLE"
+Recover digest originally signed using PKCS#1 and \s-1SHA256\s0 digest:
+.PP
+.Vb 2
+\& #include <openssl/evp.h>
+\& #include <openssl/rsa.h>
+\&
+\& EVP_PKEY_CTX *ctx;
+\& unsigned char *rout, *sig;
+\& size_t routlen, siglen;
+\& EVP_PKEY *verify_key;
+\& /* NB: assumes verify_key, sig and siglen are already set up
+\&  * and that verify_key is an RSA public key
+\&  */
+\& ctx = EVP_PKEY_CTX_new(verify_key);
+\& if (!ctx)
+\&        /* Error occurred */
+\& if (EVP_PKEY_verify_recover_init(ctx) <= 0)
+\&        /* Error */
+\& if (EVP_PKEY_CTX_set_rsa_padding(ctx, RSA_PKCS1_PADDING) <= 0)
+\&        /* Error */
+\& if (EVP_PKEY_CTX_set_signature_md(ctx, EVP_sha256()) <= 0)
+\&        /* Error */
+\&
+\& /* Determine buffer length */
+\& if (EVP_PKEY_verify_recover(ctx, NULL, &routlen, sig, siglen) <= 0)
+\&        /* Error */
+\&
+\& rout = OPENSSL_malloc(routlen);
+\&
+\& if (!rout)
+\&        /* malloc failure */
+\&
+\& if (EVP_PKEY_verify_recover(ctx, rout, &routlen, sig, siglen) <= 0)
+\&        /* Error */
+\&
+\& /* Recovered data is routlen bytes written to buffer rout */
+.Ve
+.SH "SEE ALSO"
+.IX Header "SEE ALSO"
+\&\fIEVP_PKEY_CTX_new\fR\|(3),
+\&\fIEVP_PKEY_encrypt\fR\|(3),
+\&\fIEVP_PKEY_decrypt\fR\|(3),
+\&\fIEVP_PKEY_sign\fR\|(3),
+\&\fIEVP_PKEY_verify\fR\|(3),
+\&\fIEVP_PKEY_derive\fR\|(3)
+.SH "HISTORY"
+.IX Header "HISTORY"
+These functions were first added to OpenSSL 1.0.0.
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