new manual page PEM_write_bio_ASN1_stream(3);

certainly not perfect, but arguably better than the even terser
PEM_write_bio_CMS_stream(3) and PEM_write_bio_PKCS7_stream(3)

5 files changed, 100 insertions, 6 deletions

diff --git a/src/lib/libcrypto/man/Makefile b/src/lib/libcrypto/man/Makefile
index 88610412cc..131b8eea1d 100644
--- a/src/lib/libcrypto/man/Makefile
+++ b/src/lib/libcrypto/man/Makefile
@@ -1,4 +1,4 @@
-# $OpenBSD: Makefile,v 1.225 2021/12/13 17:24:39 schwarze Exp $
+# $OpenBSD: Makefile,v 1.226 2021/12/13 18:55:22 schwarze Exp $
 
 .include <bsd.own.mk>
 
@@ -228,6 +228,7 @@ MAN=	\
         PEM_bytes_read_bio.3 \
         PEM_read.3 \
         PEM_read_bio_PrivateKey.3 \
+        PEM_write_bio_ASN1_stream.3 \
         PEM_write_bio_CMS_stream.3 \
         PEM_write_bio_PKCS7_stream.3 \
         PKCS12_SAFEBAG_new.3 \
diff --git a/src/lib/libcrypto/man/PEM_write_bio_ASN1_stream.3 b/src/lib/libcrypto/man/PEM_write_bio_ASN1_stream.3
new file mode 100644
index 0000000000..7b965e7b76
--- /dev/null
+++ b/src/lib/libcrypto/man/PEM_write_bio_ASN1_stream.3
@@ -0,0 +1,90 @@
+.\" $OpenBSD: PEM_write_bio_ASN1_stream.3,v 1.1 2021/12/13 18:55:22 schwarze Exp $
+.\"
+.\" Copyright (c) 2021 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.
+.\"
+.Dd $Mdocdate: December 13 2021 $
+.Dt PEM_WRITE_BIO_ASN1_STREAM 3
+.Os
+.Sh NAME
+.Nm PEM_write_bio_ASN1_stream
+.Nd generic PEM encoder
+.Sh SYNOPSIS
+.In openssl/asn1.h
+.Ft int
+.Fo PEM_write_bio_ASN1_stream
+.Fa "BIO *out_bio"
+.Fa "ASN1_VALUE *val_in"
+.Fa "BIO *in_bio"
+.Fa "int flags"
+.Fa "const char *hdr"
+.Fa "const ASN1_ITEM *it"
+.Fc
+.Sh DESCRIPTION
+.Fn PEM_write_bio_ASN1_stream
+writes the
+.Fa val_in
+argument of type
+.Fa it
+to
+.Fa out_bio
+in PEM format, that is, BER- and base64-encoded and surrounded by
+.Qq -----BEGIN ...-----
+and
+.Qq -----END ...-----
+lines with the
+.Fa hdr
+argument in place of the ellipses.
+.Pp
+The
+.Fa flags
+are passed through to
+.Xr i2d_ASN1_bio_stream 3 .
+In particular, if the bit
+.Dv SMIME_STREAM
+is set, streaming is performed, reading the content from
+.Fa in_bio .
+Streaming is only supported if
+.Fa val_in
+is of the type
+.Vt CMS_ContentInfo
+or
+.Vt PKCS7 .
+.Pp
+If the bit
+.Dv SMIME_STREAM
+is not set, the arguments
+.Fa in_bio
+and
+.Fa flags
+are ignored and distinguished encoding rules (DER) are used.
+.Sh RETURN VALUES
+.Fn PEM_write_bio_ASN1_stream
+is intended to return 1 on success or 0 on failure.
+.Sh SEE ALSO
+.Xr ASN1_item_i2d_bio 3 ,
+.Xr BIO_f_base64 3 ,
+.Xr BIO_new 3 ,
+.Xr i2d_ASN1_bio_stream 3 ,
+.Xr PEM_write_bio 3 ,
+.Xr PEM_write_bio_CMS_stream 3 ,
+.Xr PEM_write_bio_PKCS7_stream 3
+.Sh HISTORY
+.Fn PEM_write_bio_ASN1_stream
+first appeared in OpenSSL 1.0.0 and has been available since
+.Ox 4.9 .
+.Sh BUGS
+Many kinds of errors are silently ignored.
+This function may return 1 even if it only produced partial output
+or no output at all.
diff --git a/src/lib/libcrypto/man/PEM_write_bio_CMS_stream.3 b/src/lib/libcrypto/man/PEM_write_bio_CMS_stream.3
index 0a6b4d31d8..bd17e410bb 100644
--- a/src/lib/libcrypto/man/PEM_write_bio_CMS_stream.3
+++ b/src/lib/libcrypto/man/PEM_write_bio_CMS_stream.3
@@ -1,4 +1,4 @@
-.\" $OpenBSD: PEM_write_bio_CMS_stream.3,v 1.4 2019/11/02 15:39:46 schwarze Exp $
+.\" $OpenBSD: PEM_write_bio_CMS_stream.3,v 1.5 2021/12/13 18:55:22 schwarze Exp $
 .\" full merge up to: OpenSSL df75c2bf Dec 9 01:02:36 2018 +0100
 .\"
 .\" This file was written by Dr. Stephen Henson <steve@openssl.org>.
@@ -48,7 +48,7 @@
 .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 .\" OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd $Mdocdate: November 2 2019 $
+.Dd $Mdocdate: December 13 2021 $
 .Dt PEM_WRITE_BIO_CMS_STREAM 3
 .Os
 .Sh NAME
@@ -87,6 +87,7 @@ returns 1 for success or 0 for failure.
 .Xr ERR_get_error 3 ,
 .Xr i2d_CMS_bio_stream 3 ,
 .Xr PEM_write 3 ,
+.Xr PEM_write_bio_ASN1_stream 3 ,
 .Xr SMIME_write_CMS 3
 .Sh HISTORY
 .Fn PEM_write_bio_CMS_stream
diff --git a/src/lib/libcrypto/man/PEM_write_bio_PKCS7_stream.3 b/src/lib/libcrypto/man/PEM_write_bio_PKCS7_stream.3
index dba2a42a70..5b4175e4f3 100644
--- a/src/lib/libcrypto/man/PEM_write_bio_PKCS7_stream.3
+++ b/src/lib/libcrypto/man/PEM_write_bio_PKCS7_stream.3
@@ -1,4 +1,4 @@
-.\" $OpenBSD: PEM_write_bio_PKCS7_stream.3,v 1.10 2020/06/03 13:41:27 schwarze Exp $
+.\" $OpenBSD: PEM_write_bio_PKCS7_stream.3,v 1.11 2021/12/13 18:55:22 schwarze Exp $
 .\" full merge up to: OpenSSL df75c2bf Dec 9 01:02:36 2018 +0100
 .\"
 .\" This file was written by Dr. Stephen Henson <steve@openssl.org>.
@@ -48,7 +48,7 @@
 .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 .\" OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd $Mdocdate: June 3 2020 $
+.Dd $Mdocdate: December 13 2021 $
 .Dt PEM_WRITE_BIO_PKCS7_STREAM 3
 .Os
 .Sh NAME
@@ -80,6 +80,7 @@ otherwise 0 is returned and an error code can be retrieved with
 .Sh SEE ALSO
 .Xr BIO_new 3 ,
 .Xr i2d_PKCS7_bio_stream 3 ,
+.Xr PEM_write_bio_ASN1_stream 3 ,
 .Xr PEM_write_PKCS7 3 ,
 .Xr PKCS7_final 3 ,
 .Xr PKCS7_new 3 ,
diff --git a/src/lib/libcrypto/man/i2d_ASN1_bio_stream.3 b/src/lib/libcrypto/man/i2d_ASN1_bio_stream.3
index 82908bb10f..17ac95778c 100644
--- a/src/lib/libcrypto/man/i2d_ASN1_bio_stream.3
+++ b/src/lib/libcrypto/man/i2d_ASN1_bio_stream.3
@@ -1,4 +1,4 @@
-.\" $OpenBSD: i2d_ASN1_bio_stream.3,v 1.2 2021/12/13 17:24:39 schwarze Exp $
+.\" $OpenBSD: i2d_ASN1_bio_stream.3,v 1.3 2021/12/13 18:55:22 schwarze Exp $
 .\"
 .\" Copyright (c) 2021 Ingo Schwarze <schwarze@openbsd.org>
 .\"
@@ -83,6 +83,7 @@ is intended to return 1 on success or 0 on failure.
 .Xr BIO_push 3 ,
 .Xr i2d_CMS_bio_stream 3 ,
 .Xr i2d_PKCS7_bio_stream 3 ,
+.Xr PEM_write_bio_ASN1_stream 3 ,
 .Xr SMIME_crlf_copy 3 ,
 .Xr SMIME_write_ASN1 3
 .Sh HISTORY