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-.\"     $OpenBSD: des_read_pw.3,v 1.10 2020/06/19 17:17:13 schwarze Exp $
-.\"     OpenSSL doc/crypto/ui_compat.pod May 14 11:28:00 2006 +0000
-.\"     OpenSSL doc/crypto/des.pod 2a9aca32 Oct 25 08:44:10 2001 +0000
-.\"
-.\" This file was written by Ulf Moeller <ulf@openssl.org> and
-.\" Richard Levitte <levitte@openssl.org>.
-.\" Copyright (c) 2000, 2001 The OpenSSL Project.  All rights reserved.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\"
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\"
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in
-.\"    the documentation and/or other materials provided with the
-.\"    distribution.
-.\"
-.\" 3. All advertising materials mentioning features or use of this
-.\"    software must display the following acknowledgment:
-.\"    "This product includes software developed by the OpenSSL Project
-.\"    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
-.\"
-.\" 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
-.\"    endorse or promote products derived from this software without
-.\"    prior written permission. For written permission, please contact
-.\"    openssl-core@openssl.org.
-.\"
-.\" 5. Products derived from this software may not be called "OpenSSL"
-.\"    nor may "OpenSSL" appear in their names without prior written
-.\"    permission of the OpenSSL Project.
-.\"
-.\" 6. Redistributions of any form whatsoever must retain the following
-.\"    acknowledgment:
-.\"    "This product includes software developed by the OpenSSL Project
-.\"    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
-.\" EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-.\" PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
-.\" ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-.\" SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
-.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-.\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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-.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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-.\"
-.Dd $Mdocdate: June 19 2020 $
-.Dt DES_READ_PW 3
-.Os
-.Sh NAME
-.Nm des_read_pw ,
-.Nm des_read_pw_string ,
-.Nm EVP_read_pw_string ,
-.Nm EVP_read_pw_string_min
-.Nd compatibility user interface functions
-.Sh SYNOPSIS
-.In openssl/ui_compat.h
-.Ft int
-.Fo des_read_pw
-.Fa "char *buf"
-.Fa "char *buff"
-.Fa "int length"
-.Fa "const char *prompt"
-.Fa "int verify"
-.Fc
-.Ft int
-.Fo des_read_pw_string
-.Fa "char *buf"
-.Fa "int length"
-.Fa "const char *prompt"
-.Fa "int verify"
-.Fc
-.In openssl/evp.h
-.Ft int
-.Fo EVP_read_pw_string
-.Fa "char *buf"
-.Fa "int length"
-.Fa "const char *prompt"
-.Fa "int verify"
-.Fc
-.Ft int
-.Fo EVP_read_pw_string_min
-.Fa "char *buf"
-.Fa "int min_length"
-.Fa "int length"
-.Fa "const char *prompt"
-.Fa "int verify"
-.Fc
-.Sh DESCRIPTION
-These functions are deprecated.
-Use
-.Xr UI_UTIL_read_pw 3
-instead.
-.Pp
-The DES library contained a few routines to prompt for passwords.
-These aren't necessarily dependent on DES, and have therefore become
-part of the UI compatibility library.
-.Pp
-.Fn des_read_pw
-writes the string specified by
-.Fa prompt
-to standard output, turns echo off, and reads an input string from the
-terminal.
-The string is returned in
-.Fa buf ,
-which must have space for at least
-.Fa length
-bytes.
-If
-.Fa verify
-is set, the user is asked for the password twice and unless the two
-copies match, an error is returned.
-The second password is stored in
-.Fa buff ,
-which must therefore also be at least
-.Fa length
-bytes.
-.Pp
-.Fn des_read_pw_string
-is a variant of
-.Fn des_read_pw
-that provides a buffer if
-.Fa verify
-is set.
-It is available in the MIT Kerberos library as well.
-If
-.Fa length
-exceeds
-.Dv BUFSIZ ,
-.Fn des_read_pw_string
-uses
-.Dv BUFSIZ .
-.Pp
-.Fn EVP_read_pw_string
-and
-.Fn EVP_read_pw_string_min
-are functionally similar to
-.Fn des_read_pw_string .
-.Fn EVP_read_pw_string_min
-additionally checks that the password is at least
-.Fa min_length
-bytes long.
-.Sh RETURN VALUES
-These functions return 0 on success and a negative value on failure.
-.Pp
-They return -1 if
-.Fa length
-is less than or equal to zero or on memory allocation failure.
-They return -1 or -2 if the internal call to
-.Xr UI_process 3
-fails.
-.Pp
-In addition,
-.Fa EVP_read_pw_string_min
-returns -1 if
-.Fa min_length
-is negative, if
-.Fa length
-is less than or equal to
-.Fa min_length ,
-or if the user entered a password shorter than
-.Fa min_length .
-.Sh SEE ALSO
-.Xr UI_new 3 ,
-.Xr UI_UTIL_read_pw 3
-.Sh HISTORY
-.Fn des_read_pw_string
-appeared in SSLeay 0.4 or earlier.
-.Fn EVP_read_pw_string
-first appeared in SSLeay 0.5.1.
-.Fn des_read_pw
-first appeared in SSLeay 0.8.0.
-These functions have been available since
-.Ox 2.4 .
-.Pp
-.Fn EVP_read_pw_string_min
-first appeared in OpenSSL 1.0.0
-and has been available since
-.Ox 4.9 .
-.Sh AUTHORS
-.An Richard Levitte Aq Mt richard@levitte.org
-for the OpenSSL project.