Explain what "EVP" is supposed to mean.

It's so non-obvious that even i had to do some research to find out.
Source: The file "doc/ssleay.doc" from SSLeay 0.8.1b,
see for example OpenSSL commit d02b48c6 on Dec 21, 1998.

1 files changed, 16 insertions, 2 deletions

diff --git a/src/lib/libcrypto/man/evp.3 b/src/lib/libcrypto/man/evp.3
index 378255ad41..6ccf9898d1 100644
--- a/src/lib/libcrypto/man/evp.3
+++ b/src/lib/libcrypto/man/evp.3
@@ -1,4 +1,4 @@
-.\" $OpenBSD: evp.3,v 1.32 2024/08/30 07:03:19 tb Exp $
+.\" $OpenBSD: evp.3,v 1.33 2024/12/06 11:56:21 schwarze Exp $
 .\" full merge up to: OpenSSL man7/evp 24a535ea Sep 22 13:14:20 2020 +0100
 .\"
 .\" This file was written by Ulf Moeller <ulf@openssl.org>,
@@ -51,7 +51,7 @@
 .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 .\" OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd $Mdocdate: August 30 2024 $
+.Dd $Mdocdate: December 6 2024 $
 .Dt EVP 3
 .Os
 .Sh NAME
@@ -62,6 +62,20 @@
 .Sh DESCRIPTION
 The EVP library provides a high-level interface to cryptographic
 functions.
+The abbreviation
+.Dq EVP
+is intended to mean
+.Dq EnVeloPe
+in the sense of
+.Dq wrapper library .
+It is not related to the technical meaning of the term
+.Dq envelope
+in contexts like
+.Xr CMS_encrypt 3 ,
+.Xr EVP_SealInit 3 ,
+.Xr PKCS7_encrypt 3 ,
+or
+.Xr SMIME_write_ASN1 3 .
 .Pp
 .Xr EVP_SealInit 3
 and