OpenSSL Release 3.5.3 and 3.6 Beta Announcement

OpenSSL Announce <[email protected]> Tue, 16 Sep 2025 18:04:25 +0000
Newsgroups gmane.comp.encryption.openssl.announce
Message-ID <[email protected]>
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OpenSSL Release 3.5.3 and 3.6 Beta Announcement



RELEASE ANNOUNCEMENT FOR=
 OPENSSL LIBRARY 3.5.3

The OpenSSL Project
https://api.ourmailsender4.=
com/c/770c5be87338c237b7acf68f51ff8ad5_1f7b3eab175e89e305ba3bdfecf2856a?=
sid=3D7a7da34f196be1ea5d08d0edcb6ff739_e046e57aec68030aea0d0d76a33b3c51&aid=
=3DXp2h=C2=A0team
announces the release of new=C2=A0versions of our =
open-source toolkit for SSL/TLS.

Release changes:

 * Added FIPS 140-3 PCT on DH key generation.
 * Fixed the =
synthesised=C2=A0OPENSSL_VERSION_NUMBER.

For details of the changes, refer=
 to the release notes for version=C2=A03.5
https://api.ourmailsender4.=
com/c/324018cacb39d390f4bb965fa0c26976_2862550327b6a0572933e6d9b13bed29?=
sid=3D7a7da34f196be1ea5d08d0edcb6ff739_e046e57aec68030aea0d0d76a33b3c51&aid=
=3DXp2h.
https://api.ourmailsender4.com/c/cbf66f1e91c1a8ac5ee839d17d690b6a_=
5f025f6377149342ab8b1c2643be5862?sid=3D7a7da34f196be1ea5d08d0edcb6ff739_e04=
6e57aec68030aea0d0d76a33b3c51&aid=3DXp2h


Specific notes on upgrading from=
 previous versions are=C2=A0available in the=C2=A0OpenSSL
Migration Guide.
https://api.ourmailsender4.com/c/396355f8981e14256b242106636db785_8b4db9f29=
8012d8463b719f7bd54623c?sid=3D7a7da34f196be1ea5d08d0edcb6ff739_e046e57aec68=
030aea0d0d76a33b3c51&aid=3DXp2h

The distribution file names are:


 * For OpenSSL Library 3.5.3 -=C2=A0openssl-3.5.3
   https://api.=
ourmailsender4.com/c/3616f20270bb2e18cbac3fb893d99857_782f17f52c0b74592009c=
03d7ac7bbed?sid=3D7a7da34f196be1ea5d08d0edcb6ff739_e046e57aec68030aea0d0d76=
a33b3c51&aid=3DXp2h

You can download the 3.5.3 release from =
our=C2=A0download page
https://api.ourmailsender4.com/c/93de04075497b5b411b=
f4c1bef592d9b_f5182fd7372ae8d4289eb2f623d34b79?sid=3D7a7da34f196be1ea5d08d0=
edcb6ff739_e046e57aec68030aea0d0d76a33b3c51&aid=3DXp2h=C2=A0or
from the=C2=A0GitHub release page
https://api.ourmailsender4.=
com/c/cdc3ff058976a58475692e6776bb8a27_ab5740dda48dfb6abcc3b5baab6ddb69?=
sid=3D7a7da34f196be1ea5d08d0edcb6ff739_e046e57aec68030aea0d0d76a33b3c51&aid=
=3DXp2h.



---------------------------------------------------------------=
-----------------


RELEASE ANNOUNCEMENT FOR=C2=A0OPENSSL LIBRARY 3.6 BETA

The=C2=A0OpenSSL Project
https://api.ourmailsender4.=
com/c/110972e0a34aac36ee5f1fea1d125335_a8106d4579817c0a2612409ea195667f?=
sid=3D7a7da34f196be1ea5d08d0edcb6ff739_e046e57aec68030aea0d0d76a33b3c51&aid=
=3DXp2h=C2=A0is
pleased to announce the release of=C2=A0OpenSSL 3.6 Beta
https://api.ourmailsender4.com/c/ceed53cf58b90e0c3fac48c7c9e45766_6d0a9ed67=
e2be8ef7b809078ea4fffb4?sid=3D7a7da34f196be1ea5d08d0edcb6ff739_e046e57aec68=
030aea0d0d76a33b3c51&aid=3DXp2h,
a pre-release that adds significant new =
functionality to the OpenSSL Library.

This release incorporates the =
following potentially significant or incompatible
changes:

 * Added FIPS 140-3 PCT on DH key generation.
 * Added NIST security =
categories for PKEY objects.
 * Added support for EVP_SKEY opaque symmetric=
 key objects to the key derivation
   and key exchange provider methods.
   Added=C2=A0EVP_KDF_CTX_set_SKEY(),=C2=A0EVP_KDF_derive_SKEY(),
   and=C2=A0EVP_PKEY_derive_SKEY()=C2=A0functions.
 * The FIPS provider now=
 performs a PCT on key import for RSA, EC and ECX. This
   is mandated by FIPS 140-3 IG 10.3. An additional comment 1.
 * Added LMS signature verification support as per=C2=A0[SP 800-208]
   https://api.ourmailsender4.com/c/6da6c3141e729f992da3c144f8334a04_753253=
de6922607494e4b2400e14943d?sid=3D7a7da34f196be1ea5d08d0edcb6ff739_e046e57ae=
c68030aea0d0d76a33b3c51&aid=3DXp2h.
   This support is present in both the =
FIPS and default providers.
 * An ANSI-C toolchain is no longer sufficient =
for building OpenSSL. The code
   should build on compilers supporting C-99=
 features.
 * The VxWorks platforms have been removed.
 * Added an=C2=A0openssl configutl=C2=A0utility for processing the openssl =
configuration
   file and dumping the equal configuration file.
 * Added support for FIPS 186-5 deterministic ECDSA signature generation to=
 the
   FIPS provider.
 * Deprecated=C2=A0EVP_PKEY_ASN1_METHOD=C2=A0related=
 functions.

You can download the Beta release from our=C2=A0download page
https://api.ourmailsender4.com/c/46d295587a6e5d46256cc6d014afd372_037ffdcbd=
24fbb4bf472c8e01d8aade1?sid=3D7a7da34f196be1ea5d08d0edcb6ff739_e046e57aec68=
030aea0d0d76a33b3c51&aid=3DXp2h=C2=A0or
from the=C2=A0GitHub release page
https://api.ourmailsender4.com/c/314ae8ea1d1f89c0bd060d3ad2a9681f_9c103c6c2=
53f5a1646aa0ea995ec32a9?sid=3D7a7da34f196be1ea5d08d0edcb6ff739_e046e57aec68=
030aea0d0d76a33b3c51&aid=3DXp2h



OpenSSL Corporation
https://api.ourmailsender4.com/c/d3a64307a01906bcb3159ab89ae1e4c2_449858ce7=
c6269d78ef16d530b9ebc04?sid=3D7a7da34f196be1ea5d08d0edcb6ff739_e046e57aec68=
030aea0d0d76a33b3c51&aid=3DXp2h,
Inc. 40 East Main Street, Newark,
New Castle County, 19711, USA

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        OpenSSL Release 3.5.3 and 3.6 Beta Announcement
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19px;"><strong>Release Announcement for OpenSSL Library 3.5.=
3</strong></span></h3><p style=3D"text-align: left;" =
data-mce-style=3D"text-align: left;"><span style=3D"font-family: Roboto, =
sans-serif; font-size: 14px;" data-mce-style=3D"font-family: Roboto, =
sans-serif; font-size: 14px;">The <span style=3D"font-family: Roboto, =
sans-serif;" data-mce-style=3D"font-family: Roboto, sans-serif;"><a =
href=3D"https://api.ourmailsender4.com/c/770c5be87338c237b7acf68f51ff8ad5_1=
f7b3eab175e89e305ba3bdfecf2856a?sid=3D7a7da34f196be1ea5d08d0edcb6ff739_e046=
e57aec68030aea0d0d76a33b3c51&aid=3DXp2h" target=3D"_blank" rel=3D"noopener"=
 data-mce-href=3D"https://openssl.org/" style=3D"color: #000000;">OpenSSL =
Project</a>&nbsp;</span>team announces the release of new&nbsp;versions of =
our open-source toolkit for SSL/TLS.</span><br><span style=3D"font-family: =
Roboto, sans-serif; font-size: 14px;" data-mce-style=3D"font-family: Roboto=
, sans-serif; font-size: 14px;"><br>Release changes:</span></p><ul><li><spa=
n style=3D"font-family: Roboto, sans-serif;" data-mce-style=3D"font-family:=
 Roboto, sans-serif;">Added FIPS 140-3 PCT on DH key generation.=
</span></li><li><span style=3D"font-family: Roboto, sans-serif;" =
data-mce-style=3D"font-family: Roboto, sans-serif;">Fixed the =
synthesised&nbsp;<code>OPENSSL_VERSION_NUMBER</code>.</span></li></ul>For =
details of the changes, refer to the release notes for version&nbsp;<a =
href=3D"https://api.ourmailsender4.com/c/324018cacb39d390f4bb965fa0c26976_2=
862550327b6a0572933e6d9b13bed29?sid=3D7a7da34f196be1ea5d08d0edcb6ff739_e046=
e57aec68030aea0d0d76a33b3c51&aid=3DXp2h" target=3D"_blank" rel=3D"noopener"=
 data-mce-href=3D"https://github.com/openssl/openssl/blob/openssl-3.=
5/CHANGES.md" style=3D"color: #000000;">3.5</a><a href=3D"https://api.=
ourmailsender4.com/c/cbf66f1e91c1a8ac5ee839d17d690b6a_5f025f6377149342ab8b1=
c2643be5862?sid=3D7a7da34f196be1ea5d08d0edcb6ff739_e046e57aec68030aea0d0d76=
a33b3c51&aid=3DXp2h" target=3D"_blank" rel=3D"noopener" =
data-mce-href=3D"https://github.com/openssl/openssl/blob/openssl-3.=
4/CHANGES.md" style=3D"color: #000000;">.</a><br><p style=3D"text-align: =
left;" data-mce-style=3D"text-align: left;"><span style=3D"font-family: =
Roboto, sans-serif; font-size: 14px;" data-mce-style=3D"font-family: Roboto=
, sans-serif; font-size: 14px;">Specific notes on upgrading from previous =
versions are&nbsp;available in the&nbsp;<a href=3D"https://api.=
ourmailsender4.com/c/396355f8981e14256b242106636db785_8b4db9f298012d8463b71=
9f7bd54623c?sid=3D7a7da34f196be1ea5d08d0edcb6ff739_e046e57aec68030aea0d0d76=
a33b3c51&aid=3DXp2h" target=3D"_blank" rel=3D"noopener" =
data-mce-href=3D"https://docs.openssl.org/master/man7/ossl-guide-migration/=
" style=3D"color: #000000;">OpenSSL Migration Guide.</a><br><br>The =
distribution file names are:</span><span style=3D"font-family: Roboto, =
sans-serif; font-size: 14px;" data-mce-style=3D"font-family: Roboto, =
sans-serif; font-size: 14px;"><br></span></p><ul><li><span =
style=3D"font-family: Roboto, sans-serif; font-size: 14px;" =
data-mce-style=3D"font-family: Roboto, sans-serif; font-size: 14px;">For =
OpenSSL Library 3.5.3 -&nbsp;<a href=3D"https://api.ourmailsender4.=
com/c/3616f20270bb2e18cbac3fb893d99857_782f17f52c0b74592009c03d7ac7bbed?=
sid=3D7a7da34f196be1ea5d08d0edcb6ff739_e046e57aec68030aea0d0d76a33b3c51&aid=
=3DXp2h" target=3D"_blank" rel=3D"noopener" data-mce-href=3D"https://github=
.com/openssl/openssl/releases/tag/openssl-3.5.3" style=3D"color: =
#000000;">openssl-3.5.3</a></span></li></ul><span style=3D"font-family: =
Roboto, sans-serif;" data-mce-style=3D"font-family: Roboto, =
sans-serif;">You can download the 3.5.3 release from our&nbsp;<a =
href=3D"https://api.ourmailsender4.com/c/93de04075497b5b411bf4c1bef592d9b_f=
5182fd7372ae8d4289eb2f623d34b79?sid=3D7a7da34f196be1ea5d08d0edcb6ff739_e046=
e57aec68030aea0d0d76a33b3c51&aid=3DXp2h" target=3D"_blank" rel=3D"noopener"=
 data-mce-href=3D"https://www.openssl-library.org/source/" style=3D"color: =
#000000;">download page</a>&nbsp;or from the&nbsp;<a href=3D"https://api.=
ourmailsender4.com/c/cdc3ff058976a58475692e6776bb8a27_ab5740dda48dfb6abcc3b=
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a33b3c51&aid=3DXp2h" target=3D"_blank" rel=3D"noopener" =
data-mce-href=3D"https://github.com/openssl/openssl/releases" =
style=3D"color: #000000;">GitHub release page</a>.<br></span><br><hr><h3 =
style=3D"text-align: center;" data-mce-style=3D"text-align: center;"><span =
style=3D"font-family: Arial; font-size: 19px;" data-mce-style=3D"font-famil=
y: Arial; font-size: 19px;"><strong>Release Announcement =
for&nbsp;</strong><strong>OpenSSL Library 3.6 Beta</strong></span></h3><p =
style=3D"text-align: justify;" data-mce-style=3D"text-align: =
justify;"><span style=3D"font-family: Roboto, sans-serif;" =
data-mce-style=3D"font-family: Roboto, sans-serif;">The&nbsp;<a =
href=3D"https://api.ourmailsender4.com/c/110972e0a34aac36ee5f1fea1d125335_a=
8106d4579817c0a2612409ea195667f?sid=3D7a7da34f196be1ea5d08d0edcb6ff739_e046=
e57aec68030aea0d0d76a33b3c51&aid=3DXp2h" target=3D"_blank" rel=3D"noopener"=
 data-mce-href=3D"https://openssl.org/" style=3D"color: #000000;">OpenSSL =
Project</a>&nbsp;is pleased to announce the release of&nbsp;<a =
href=3D"https://api.ourmailsender4.com/c/ceed53cf58b90e0c3fac48c7c9e45766_6=
d0a9ed67e2be8ef7b809078ea4fffb4?sid=3D7a7da34f196be1ea5d08d0edcb6ff739_e046=
e57aec68030aea0d0d76a33b3c51&aid=3DXp2h" target=3D"_blank" rel=3D"noopener"=
 data-mce-href=3D"https://github.com/openssl/openssl/releases/tag/openssl-3=
.6.0-beta1" style=3D"color: #000000;">OpenSSL 3.6 Beta</a>, a pre-release =
that adds significant new functionality to the OpenSSL Library.=
</span></p><p><span style=3D"font-family: Roboto, sans-serif;" =
data-mce-style=3D"font-family: Roboto, sans-serif;">This release =
incorporates the following potentially significant or incompatible =
changes:</span></p><ul><li><span style=3D"font-family: Roboto, sans-serif;"=
 data-mce-style=3D"font-family: Roboto, sans-serif;">Added FIPS 140-3 PCT =
on DH key generation.</span></li><li><span style=3D"font-family: Roboto, =
sans-serif;" data-mce-style=3D"font-family: Roboto, sans-serif;">Added NIST=
 security categories for PKEY objects.</span></li><li><span =
style=3D"font-family: Roboto, sans-serif;" data-mce-style=3D"font-family: =
Roboto, sans-serif;">Added support for EVP_SKEY opaque symmetric key =
objects to the key derivation and key exchange provider methods. =
Added&nbsp;<code>EVP_KDF_CTX_set_SKEY()</code>,&nbsp;<code>EVP_KDF_derive_S=
KEY()</code>, and&nbsp;<code>EVP_PKEY_derive_SKEY()</code>&nbsp;functions.=
</span></li><li><span style=3D"font-family: Roboto, sans-serif;" =
data-mce-style=3D"font-family: Roboto, sans-serif;">The FIPS provider now =
performs a PCT on key import for RSA, EC and ECX. This is mandated by FIPS =
140-3 IG 10.3. An additional comment 1.</span></li><li><span =
style=3D"font-family: Roboto, sans-serif;" data-mce-style=3D"font-family: =
Roboto, sans-serif;">Added LMS signature verification support as =
per&nbsp;<a href=3D"https://api.ourmailsender4.com/c/6da6c3141e729f992da3c1=
44f8334a04_753253de6922607494e4b2400e14943d?sid=3D7a7da34f196be1ea5d08d0edc=
b6ff739_e046e57aec68030aea0d0d76a33b3c51&aid=3DXp2h" =
data-mce-href=3D"https://csrc.nist.gov/pubs/sp/800/208/final" =
style=3D"color: #000000;">[SP 800-208]</a>. This support is present in both=
 the FIPS and default providers.</span></li><li><span style=3D"font-family:=
 Roboto, sans-serif;" data-mce-style=3D"font-family: Roboto, =
sans-serif;">An ANSI-C toolchain is no longer sufficient for building =
OpenSSL. The code should build on compilers supporting C-99 features.=
</span></li><li><span style=3D"font-family: Roboto, sans-serif;" =
data-mce-style=3D"font-family: Roboto, sans-serif;">The VxWorks platforms =
have been removed.</span></li><li><span style=3D"font-family: Roboto, =
sans-serif;" data-mce-style=3D"font-family: Roboto, sans-serif;">Added =
an&nbsp;<code>openssl configutl</code>&nbsp;utility for processing the =
openssl configuration file and dumping the equal configuration file.=
</span></li><li><span style=3D"font-family: Roboto, sans-serif;" =
data-mce-style=3D"font-family: Roboto, sans-serif;">Added support for FIPS =
186-5 deterministic ECDSA signature generation to the FIPS provider.=
</span></li><li><span style=3D"font-family: Roboto, sans-serif;" =
data-mce-style=3D"font-family: Roboto, sans-serif;">Deprecated&nbsp;<code>E=
VP_PKEY_ASN1_METHOD</code>&nbsp;related functions.</span></li></ul><p><span=
 style=3D"font-family: Roboto, sans-serif;" data-mce-style=3D"font-family: =
Roboto, sans-serif;">You can download the Beta release from our&nbsp;<a =
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37ffdcbd24fbb4bf472c8e01d8aade1?sid=3D7a7da34f196be1ea5d08d0edcb6ff739_e046=
e57aec68030aea0d0d76a33b3c51&aid=3DXp2h" target=3D"_blank" rel=3D"noopener"=
 data-mce-href=3D"https://www.openssl-library.org/source/" style=3D"color: =
#000000;">download page</a>&nbsp;or from the&nbsp;<a href=3D"https://api.=
ourmailsender4.com/c/314ae8ea1d1f89c0bd060d3ad2a9681f_9c103c6c253f5a1646aa0=
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a33b3c51&aid=3DXp2h" target=3D"_blank" rel=3D"noopener" =
data-mce-href=3D"https://github.com/openssl/openssl/releases" =
style=3D"color: #000000;">GitHub release page</a></span></p></div></td></tr=
></table></td></tr></table><table align=3D"center" class=3D"" =
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