.\" Automatically generated by Pod::Man 4.11 (Pod::Simple 3.39)
.\"
.\" 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" ''
. ds C`
. ds C'
'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 >0, 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.
.\"
.\" Avoid warning from groff about undefined register 'F'.
.de IX
..
.nr rF 0
.if \n(.g .if rF .nr rF 1
.if (\n(rF:(\n(.g==0)) \{\
. if \nF \{\
. de IX
. tm Index:\\$1\t\\n%\t"\\$2"
..
. if !\nF==2 \{\
. nr % 0
. nr F 2
. \}
. \}
.\}
.rr rF
.\"
.\" 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 "OSSL_STORE_LOADER 3"
.TH OSSL_STORE_LOADER 3 "2019-09-10" "1.1.1d" "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"
OSSL_STORE_LOADER, OSSL_STORE_LOADER_CTX, OSSL_STORE_LOADER_new, OSSL_STORE_LOADER_get0_engine, OSSL_STORE_LOADER_get0_scheme, OSSL_STORE_LOADER_set_open, OSSL_STORE_LOADER_set_ctrl, OSSL_STORE_LOADER_set_expect, OSSL_STORE_LOADER_set_find, OSSL_STORE_LOADER_set_load, OSSL_STORE_LOADER_set_eof, OSSL_STORE_LOADER_set_error, OSSL_STORE_LOADER_set_close, OSSL_STORE_LOADER_free, OSSL_STORE_register_loader, OSSL_STORE_unregister_loader, OSSL_STORE_open_fn, OSSL_STORE_ctrl_fn, OSSL_STORE_expect_fn, OSSL_STORE_find_fn, OSSL_STORE_load_fn, OSSL_STORE_eof_fn, OSSL_STORE_error_fn, OSSL_STORE_close_fn \- Types and functions to manipulate, register and unregister STORE loaders for different URI schemes
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/store.h>
\&
\& typedef struct ossl_store_loader_st OSSL_STORE_LOADER;
\&
\& OSSL_STORE_LOADER *OSSL_STORE_LOADER_new(ENGINE *e, const char *scheme);
\& const ENGINE *OSSL_STORE_LOADER_get0_engine(const OSSL_STORE_LOADER
\& *store_loader);
\& const char *OSSL_STORE_LOADER_get0_scheme(const OSSL_STORE_LOADER
\& *store_loader);
\&
\& /* struct ossl_store_loader_ctx_st is defined differently by each loader */
\& typedef struct ossl_store_loader_ctx_st OSSL_STORE_LOADER_CTX;
\&
\& typedef OSSL_STORE_LOADER_CTX *(*OSSL_STORE_open_fn)(const char *uri,
\& const UI_METHOD *ui_method,
\& void *ui_data);
\& int OSSL_STORE_LOADER_set_open(OSSL_STORE_LOADER *store_loader,
\& OSSL_STORE_open_fn store_open_function);
\& typedef int (*OSSL_STORE_ctrl_fn)(OSSL_STORE_LOADER_CTX *ctx, int cmd,
\& va_list args);
\& int OSSL_STORE_LOADER_set_ctrl(OSSL_STORE_LOADER *store_loader,
\& OSSL_STORE_ctrl_fn store_ctrl_function);
\& typedef int (*OSSL_STORE_expect_fn)(OSSL_STORE_LOADER_CTX *ctx, int expected);
\& int OSSL_STORE_LOADER_set_expect(OSSL_STORE_LOADER *loader,
\& OSSL_STORE_expect_fn expect_function);
\& typedef int (*OSSL_STORE_find_fn)(OSSL_STORE_LOADER_CTX *ctx,
\& OSSL_STORE_SEARCH *criteria);
\& int OSSL_STORE_LOADER_set_find(OSSL_STORE_LOADER *loader,
\& OSSL_STORE_find_fn find_function);
\& typedef OSSL_STORE_INFO *(*OSSL_STORE_load_fn)(OSSL_STORE_LOADER_CTX *ctx,
\& UI_METHOD *ui_method,
\& void *ui_data);
\& int OSSL_STORE_LOADER_set_load(OSSL_STORE_LOADER *store_loader,
\& OSSL_STORE_load_fn store_load_function);
\& typedef int (*OSSL_STORE_eof_fn)(OSSL_STORE_LOADER_CTX *ctx);
\& int OSSL_STORE_LOADER_set_eof(OSSL_STORE_LOADER *store_loader,
\& OSSL_STORE_eof_fn store_eof_function);
\& typedef int (*OSSL_STORE_error_fn)(OSSL_STORE_LOADER_CTX *ctx);
\& int OSSL_STORE_LOADER_set_error(OSSL_STORE_LOADER *store_loader,
\& OSSL_STORE_error_fn store_error_function);
\& typedef int (*OSSL_STORE_close_fn)(OSSL_STORE_LOADER_CTX *ctx);
\& int OSSL_STORE_LOADER_set_close(OSSL_STORE_LOADER *store_loader,
\& OSSL_STORE_close_fn store_close_function);
\& void OSSL_STORE_LOADER_free(OSSL_STORE_LOADER *store_loader);
\&
\& int OSSL_STORE_register_loader(OSSL_STORE_LOADER *loader);
\& OSSL_STORE_LOADER *OSSL_STORE_unregister_loader(const char *scheme);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
These functions help applications and engines to create loaders for
schemes they support.
.SS "Types"
.IX Subsection "Types"
\&\fB\s-1OSSL_STORE_LOADER\s0\fR is the type to hold a loader.
It contains a scheme and the functions needed to implement
\&\fBOSSL_STORE_open()\fR, \fBOSSL_STORE_load()\fR, \fBOSSL_STORE_eof()\fR, \fBOSSL_STORE_error()\fR and
\&\fBOSSL_STORE_close()\fR for this scheme.
.PP
\&\fB\s-1OSSL_STORE_LOADER_CTX\s0\fR is a type template, to be defined by each loader
using \fBstruct ossl_store_loader_ctx_st { ... }\fR.
.PP
\&\fBOSSL_STORE_open_fn\fR, \fBOSSL_STORE_ctrl_fn\fR, \fBOSSL_STORE_expect_fn\fR,
\&\fBOSSL_STORE_find_fn\fR, \fBOSSL_STORE_load_fn\fR, \fBOSSL_STORE_eof_fn\fR,
and \fBOSSL_STORE_close_fn\fR
are the function pointer types used within a \s-1STORE\s0 loader.
The functions pointed at define the functionality of the given loader.
.IP "\fBOSSL_STORE_open_fn\fR" 4
.IX Item "OSSL_STORE_open_fn"
This function takes a \s-1URI\s0 and is expected to interpret it in the best
manner possible according to the scheme the loader implements, it also
takes a \fB\s-1UI_METHOD\s0\fR and associated data, to be used any time
something needs to be prompted for.
Furthermore, this function is expected to initialize what needs to be
initialized, to create a private data store (\fB\s-1OSSL_STORE_LOADER_CTX\s0\fR, see
above), and to return it.
If something goes wrong, this function is expected to return \s-1NULL.\s0
.IP "\fBOSSL_STORE_ctrl_fn\fR" 4
.IX Item "OSSL_STORE_ctrl_fn"
This function takes a \fB\s-1OSSL_STORE_LOADER_CTX\s0\fR pointer, a command number
\&\fBcmd\fR and a \fBva_list\fR \fBargs\fR and is used to manipulate loader
specific parameters.
.Sp
Loader specific command numbers must begin at \fB\s-1OSSL_STORE_C_CUSTOM_START\s0\fR.
Any number below that is reserved for future globally known command
numbers.
.Sp
This function is expected to return 1 on success, 0 on error.
.IP "\fBOSSL_STORE_expect_fn\fR" 4
.IX Item "OSSL_STORE_expect_fn"
This function takes a \fB\s-1OSSL_STORE_LOADER_CTX\s0\fR pointer and a \fB\s-1OSSL_STORE_INFO\s0\fR
identity \fBexpected\fR, and is used to tell the loader what object type is
expected.
\&\fBexpected\fR may be zero to signify that no specific object type is expected.
.Sp
This function is expected to return 1 on success, 0 on error.
.IP "\fBOSSL_STORE_find_fn\fR" 4
.IX Item "OSSL_STORE_find_fn"
This function takes a \fB\s-1OSSL_STORE_LOADER_CTX\s0\fR pointer and a
\&\fB\s-1OSSL_STORE_SEARCH\s0\fR search criterion, and is used to tell the loader what
to search for.
.Sp
When called with the loader context being \fB\s-1NULL\s0\fR, this function is expected
to return 1 if the loader supports the criterion, otherwise 0.
.Sp
When called with the loader context being something other than \fB\s-1NULL\s0\fR, this
function is expected to return 1 on success, 0 on error.
.IP "\fBOSSL_STORE_load_fn\fR" 4
.IX Item "OSSL_STORE_load_fn"
This function takes a \fB\s-1OSSL_STORE_LOADER_CTX\s0\fR pointer and a \fB\s-1UI_METHOD\s0\fR
with associated data.
It's expected to load the next available data, mold it into a data
structure that can be wrapped in a \fB\s-1OSSL_STORE_INFO\s0\fR using one of the
\&\s-1\fBOSSL_STORE_INFO\s0\fR\|(3) functions.
If no more data is available or an error occurs, this function is
expected to return \s-1NULL.\s0
The \fBOSSL_STORE_eof_fn\fR and \fBOSSL_STORE_error_fn\fR functions must indicate if
it was in fact the end of data or if an error occurred.
.Sp
Note that this function retrieves \fIone\fR data item only.
.IP "\fBOSSL_STORE_eof_fn\fR" 4
.IX Item "OSSL_STORE_eof_fn"
This function takes a \fB\s-1OSSL_STORE_LOADER_CTX\s0\fR pointer and is expected to
return 1 to indicate that the end of available data has been reached.
It is otherwise expected to return 0.
.IP "\fBOSSL_STORE_error_fn\fR" 4
.IX Item "OSSL_STORE_error_fn"
This function takes a \fB\s-1OSSL_STORE_LOADER_CTX\s0\fR pointer and is expected to
return 1 to indicate that an error occurred in a previous call to the
\&\fBOSSL_STORE_load_fn\fR function.
It is otherwise expected to return 0.
.IP "\fBOSSL_STORE_close_fn\fR" 4
.IX Item "OSSL_STORE_close_fn"
This function takes a \fB\s-1OSSL_STORE_LOADER_CTX\s0\fR pointer and is expected to
close or shut down what needs to be closed, and finally free the
contents of the \fB\s-1OSSL_STORE_LOADER_CTX\s0\fR pointer.
It returns 1 on success and 0 on error.
.SS "Functions"
.IX Subsection "Functions"
\&\fBOSSL_STORE_LOADER_new()\fR creates a new \fB\s-1OSSL_STORE_LOADER\s0\fR.
It takes an \fB\s-1ENGINE\s0\fR \fBe\fR and a string \fBscheme\fR.
\&\fBscheme\fR must \fIalways\fR be set.
Both \fBe\fR and \fBscheme\fR are used as is and must therefore be alive as
long as the created loader is.
.PP
\&\fBOSSL_STORE_LOADER_get0_engine()\fR returns the engine of the \fBstore_loader\fR.
\&\fBOSSL_STORE_LOADER_get0_scheme()\fR returns the scheme of the \fBstore_loader\fR.
.PP
\&\fBOSSL_STORE_LOADER_set_open()\fR sets the opener function for the
\&\fBstore_loader\fR.
.PP
\&\fBOSSL_STORE_LOADER_set_ctrl()\fR sets the control function for the
\&\fBstore_loader\fR.
.PP
\&\fBOSSL_STORE_LOADER_set_expect()\fR sets the expect function for the
\&\fBstore_loader\fR.
.PP
\&\fBOSSL_STORE_LOADER_set_load()\fR sets the loader function for the
\&\fBstore_loader\fR.
.PP
\&\fBOSSL_STORE_LOADER_set_eof()\fR sets the end of file checker function for the
\&\fBstore_loader\fR.
.PP
\&\fBOSSL_STORE_LOADER_set_close()\fR sets the closing function for the
\&\fBstore_loader\fR.
.PP
\&\fBOSSL_STORE_LOADER_free()\fR frees the given \fBstore_loader\fR.
.PP
\&\fBOSSL_STORE_register_loader()\fR register the given \fBstore_loader\fR and thereby
makes it available for use with \fBOSSL_STORE_open()\fR, \fBOSSL_STORE_load()\fR,
\&\fBOSSL_STORE_eof()\fR and \fBOSSL_STORE_close()\fR.
.PP
\&\fBOSSL_STORE_unregister_loader()\fR unregister the store loader for the given
\&\fBscheme\fR.
.SH "NOTES"
.IX Header "NOTES"
The \fBfile:\fR scheme has built in support.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
The functions with the types \fBOSSL_STORE_open_fn\fR, \fBOSSL_STORE_ctrl_fn\fR,
\&\fBOSSL_STORE_expect_fn\fR,
\&\fBOSSL_STORE_load_fn\fR, \fBOSSL_STORE_eof_fn\fR and \fBOSSL_STORE_close_fn\fR have the
same return values as \fBOSSL_STORE_open()\fR, \fBOSSL_STORE_ctrl()\fR, \fBOSSL_STORE_expect()\fR,
\&\fBOSSL_STORE_load()\fR, \fBOSSL_STORE_eof()\fR and \fBOSSL_STORE_close()\fR, respectively.
.PP
\&\fBOSSL_STORE_LOADER_new()\fR returns a pointer to a \fB\s-1OSSL_STORE_LOADER\s0\fR on success,
or \fB\s-1NULL\s0\fR on failure.
.PP
\&\fBOSSL_STORE_LOADER_set_open()\fR, \fBOSSL_STORE_LOADER_set_ctrl()\fR,
\&\fBOSSL_STORE_LOADER_set_load()\fR, \fBOSSL_STORE_LOADER_set_eof()\fR and
\&\fBOSSL_STORE_LOADER_set_close()\fR return 1 on success, or 0 on failure.
.PP
\&\fBOSSL_STORE_register_loader()\fR returns 1 on success, or 0 on failure.
.PP
\&\fBOSSL_STORE_unregister_loader()\fR returns the unregistered loader on success,
or \fB\s-1NULL\s0\fR on failure.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBossl_store\fR\|(7), \fBOSSL_STORE_open\fR\|(3)
.SH "HISTORY"
.IX Header "HISTORY"
\&\s-1\fBOSSL_STORE_LOADER\s0()\fR, \s-1\fBOSSL_STORE_LOADER_CTX\s0()\fR, \fBOSSL_STORE_LOADER_new()\fR,
\&\fBOSSL_STORE_LOADER_set0_scheme()\fR, \fBOSSL_STORE_LOADER_set_open()\fR,
\&\fBOSSL_STORE_LOADER_set_ctrl()\fR, \fBOSSL_STORE_LOADER_set_load()\fR,
\&\fBOSSL_STORE_LOADER_set_eof()\fR, \fBOSSL_STORE_LOADER_set_close()\fR,
\&\fBOSSL_STORE_LOADER_free()\fR, \fBOSSL_STORE_register_loader()\fR,
\&\fBOSSL_STORE_unregister_loader()\fR, \fBOSSL_STORE_open_fn()\fR, \fBOSSL_STORE_ctrl_fn()\fR,
\&\fBOSSL_STORE_load_fn()\fR, \fBOSSL_STORE_eof_fn()\fR and \fBOSSL_STORE_close_fn()\fR
were added in OpenSSL 1.1.1.
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2016\-2019 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (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>.
