Mention EVP_PKEY_encrypt_old(3) and EVP_PKEY_decrypt_old(3) because

some software still calls them.  Put them here because despite the
function and header names, they are really specific to RSA.  Besides,
this avoids a distraction in the more important EVP_PKEY_encrypt(3)
and EVP_PKEY_decrypt(3) manual pages.

diff --git a/lib/libcrypto/man/RSA_public_encrypt.3 b/lib/libcrypto/man/RSA_public_encrypt.3
index b1b4d2a..be3afdf 100644 (file)
--- a/lib/libcrypto/man/RSA_public_encrypt.3
+++ b/lib/libcrypto/man/RSA_public_encrypt.3
@@ -1,7 +1,24 @@
-.\"    $OpenBSD: RSA_public_encrypt.3,v 1.12 2019/06/10 14:58:48 schwarze Exp $
+.\"    $OpenBSD: RSA_public_encrypt.3,v 1.13 2023/09/10 16:04:15 schwarze Exp $
 .\"    OpenSSL RSA_public_encrypt.pod 1e3f62a3 Jul 17 16:47:13 2017 +0200
 .\"
-.\" This file was written by Ulf Moeller <ulf@openssl.org>.
+.\" This file is a derived work.
+.\" The changes are covered by the following Copyright and license:
+.\"
+.\" Copyright (c) 2023 Ingo Schwarze <schwarze@openbsd.org>
+.\"
+.\" Permission to use, copy, modify, and distribute this software for any
+.\" purpose with or without fee is hereby granted, provided that the above
+.\" copyright notice and this permission notice appear in all copies.
+.\"
+.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+.\"
+.\" The original file was written by Ulf Moeller <ulf@openssl.org>.
 .\" Copyright (c) 2000, 2004 The OpenSSL Project.  All rights reserved.
 .\"
 .\" Redistribution and use in source and binary forms, with or without
@@ -48,12 +65,14 @@
 .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 .\" OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd $Mdocdate: June 10 2019 $
+.Dd $Mdocdate: September 10 2023 $
 .Dt RSA_PUBLIC_ENCRYPT 3
 .Os
 .Sh NAME
 .Nm RSA_public_encrypt ,
-.Nm RSA_private_decrypt
+.Nm RSA_private_decrypt ,
+.Nm EVP_PKEY_encrypt_old ,
+.Nm EVP_PKEY_decrypt_old
 .Nd RSA public key cryptography
 .Sh SYNOPSIS
 .In openssl/rsa.h
@@ -73,6 +92,21 @@
 .Fa "RSA *rsa"
 .Fa "int padding"
 .Fc
+.In openssl/evp.h
+.Ft int
+.Fo EVP_PKEY_encrypt_old
+.Fa "unsigned char *to"
+.Fa "const unsigned char *from"
+.Fa "int flen"
+.Fa "EVP_PKEY *pkey"
+.Fc
+.Ft int
+.Fo EVP_PKEY_decrypt_old
+.Fa "unsigned char *to"
+.Fa "const unsigned char *from"
+.Fa "int flen"
+.Fa "EVP_PKEY *pkey"
+.Fc
 .Sh DESCRIPTION
 .Fn RSA_public_encrypt
 encrypts the
@@ -132,16 +166,50 @@ must point to a memory section large enough to hold the decrypted data
 .Fn RSA_size rsa ) .
 .Fa padding
 is the padding mode that was used to encrypt the data.
+.Pp
+.Fn EVP_PKEY_encrypt_old
+is a deprecated wrapper around
+.Fn RSA_public_encrypt
+that uses the
+.Vt RSA
+public key stored in
+.Fa pkey
+and
+.Dv RSA_PKCS1_PADDING .
+.Pp
+.Fn EVP_PKEY_decrypt_old
+is a deprecated wrapper around
+.Fn RSA_private_decrypt
+that uses the
+.Vt RSA
+private key stored in
+.Fa pkey
+and
+.Dv RSA_PKCS1_PADDING .
 .Sh RETURN VALUES
 .Fn RSA_public_encrypt
-returns the size of the encrypted data (i.e.\&
+and
+.Fn EVP_PKEY_encrypt_old
+return the size of the encrypted data (i.e.\&
 .Fn RSA_size rsa ) .
 .Fn RSA_private_decrypt
+and
+.Fn EVP_PKEY_decrypt_old
 returns the size of the recovered plaintext.
-.Pp
-On error, -1 is returned; the error codes can be obtained by
+On error, \-1 is returned; the error codes can be obtained by
 .Xr ERR_get_error 3 .
+.Pp
+In addition to the return values documented above,
+.Fn EVP_PKEY_encrypt_old
+may return 0 if the
+.Xr EVP_PKEY_id 3
+of
+.Fa pkey
+is not
+.Dv EVP_PKEY_RSA .
 .Sh SEE ALSO
+.Xr EVP_PKEY_decrypt 3 ,
+.Xr EVP_PKEY_encrypt 3 ,
 .Xr RSA_meth_set_priv_dec 3 ,
 .Xr RSA_new 3 ,
 .Xr RSA_size 3
@@ -154,6 +222,18 @@ and
 appeared in SSLeay 0.4 or earlier and have been available since
 .Ox 2.4 .
 .Pp
+.Fn EVP_PKEY_encrypt
+and
+.Fn EVP_PKEY_decrypt
+first appeared in SSLeay 0.9.0 and have been available since
+.Ox 2.4 .
+There were renamed to
+.Fn EVP_PKEY_encrypt_old
+and
+.Fn EVP_PKEY_decrypt_old
+in OpenSSL 1.0.0 and
+.Ox 4.9 .
+.Pp
 .Dv RSA_NO_PADDING
 is available since SSLeay 0.9.0.
 OAEP was added in OpenSSL 0.9.2b.