1 files changed, 8 insertions, 3 deletions

diff --git a/src/lib/libcrypto/man/PKCS7_add_attribute.3 b/src/lib/libcrypto/man/PKCS7_add_attribute.3
index 4a1c350f98..e7c8c734c4 100644
--- a/src/lib/libcrypto/man/PKCS7_add_attribute.3
+++ b/src/lib/libcrypto/man/PKCS7_add_attribute.3
@@ -1,4 +1,4 @@
-.\" $OpenBSD: PKCS7_add_attribute.3,v 1.3 2020/06/10 11:39:12 schwarze Exp $
+.\" $OpenBSD: PKCS7_add_attribute.3,v 1.6 2025/07/27 19:31:20 schwarze Exp $
 .\"
 .\" Copyright (c) 2020 Ingo Schwarze <schwarze@openbsd.org>
 .\"
@@ -14,7 +14,7 @@
 .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"
-.Dd $Mdocdate: June 10 2020 $
+.Dd $Mdocdate: July 27 2025 $
 .Dt PKCS7_ADD_ATTRIBUTE 3
 .Os
 .Sh NAME
@@ -30,6 +30,7 @@
 .Nm PKCS7_add_attrib_smimecap
 .Nd attributes of SignerInfo objects
 .Sh SYNOPSIS
+.Lb libcrypto
 .In openssl/pkcs7.h
 .Ft int
 .Fo PKCS7_add_attribute
@@ -306,6 +307,10 @@ RFC 2985: PKCS #9: Selected Object Classes and Attribute Types Version 2.0,
 section 5.3: Attribute types for use in PKCS #7 data
 and section 5.6: Attributes defined in S/MIME
 .Pp
+RFC 5652: Cryptographic Message Syntax (CMS),
+section 5.3: SignerInfo Type
+and section 11: Useful Attributes
+.Pp
 RFC 8551: Secure/Multipurpose Internet Mail Extensions (S/MIME)
 Version 4.0 Message Specification,
 section 2.5.2: SMIMECapabilities Attribute
@@ -345,7 +350,7 @@ in a state that violates the standard.
 .Fn PKCS7_add0_attrib_signing_time
 does not validate
 .Fa t
-in any way.
+beyond checking that it is well-formed per RFC 5652, section 11.3.
 In particular, it may set the signing time to the future
 or to the remote past.
 .Sh BUGS