VERSION             |  2 +-
 gost3410/private.go | 35 +++++++++++++++++++++++++++++++++++
 install.texi        |  2 +-
 news.texi           |  6 ++++++

diff --git a/VERSION b/VERSION
index fee4582f77aca97abcf501894498f5dbd35aa8a7e54fcd4e8f11b78debfe3cc5..976c3ef46cb8b05ad32a9279ef35015e87cbc2cb2c059307536ff2c458ca7167 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-4.2.3
+4.2.4
diff --git a/gost3410/private.go b/gost3410/private.go
index 597f229b1d9a787be7d85cf2690961e69f7021fe960d22e34b832086afb8fd1b..c6bcc822128c5f8c85fb6fb642769015ab3a6ec81f2bfe14cf08da9b3e67ba5e 100644
--- a/gost3410/private.go
+++ b/gost3410/private.go
@@ -119,3 +119,38 @@ 		panic(err)
 	}
 	return pub
 }
+
+type PrivateKeyReverseDigest struct {
+	Prv *PrivateKey
+}
+
+func (prv *PrivateKeyReverseDigest) Public() crypto.PublicKey {
+	return prv.Prv.Public()
+}
+
+func (prv *PrivateKeyReverseDigest) Sign(rand io.Reader, digest []byte, opts crypto.SignerOpts) ([]byte, error) {
+	d := make([]byte, len(digest))
+	copy(d, digest)
+	reverse(d)
+	return prv.Prv.Sign(rand, d, opts)
+}
+
+type PrivateKeyReverseDigestAndSignature struct {
+	Prv *PrivateKey
+}
+
+func (prv *PrivateKeyReverseDigestAndSignature) Public() crypto.PublicKey {
+	return prv.Prv.Public()
+}
+
+func (prv *PrivateKeyReverseDigestAndSignature) Sign(rand io.Reader, digest []byte, opts crypto.SignerOpts) ([]byte, error) {
+	d := make([]byte, len(digest))
+	copy(d, digest)
+	reverse(d)
+	sign, err := prv.Prv.Sign(rand, d, opts)
+	if err != nil {
+		return sign, err
+	}
+	reverse(sign)
+	return sign, err
+}
diff --git a/install.texi b/install.texi
index 695143ff23a3d6945ab80a845921a9ab15d06d3a594877b330ea2ce1bd3b9970..1eba1011bf7b07d65ec0c7591630ae27001538097253d039bf71b780c8edd1f7 100644
--- a/install.texi
+++ b/install.texi
@@ -1,7 +1,7 @@
 @node Download
 @unnumbered Download
 
-@set VERSION 4.2.3
+@set VERSION 4.2.4
 
 Preferable way is to download tarball with the signature from
 website and, for example, run tests with benchmarks:
diff --git a/news.texi b/news.texi
index 7e4b13cbe684ae2c8415719dcfbb2ad84b885014dc1bdf4080aeabec968e90f7..f748611ab59327628b15d6effef18acd6e8ff62251208c775155f909619ccc30 100644
--- a/news.texi
+++ b/news.texi
@@ -3,6 +3,12 @@ @unnumbered News
 
 @table @strong
 
+@anchor{Release 4.2.4}
+@item 4.2.4
+    @code{gost3410.PrivateKeyReverseDigest} reversed digests and
+    @code{PrivateKeyReverseDigestAndSignature} with also reversed signatures
+    signers appeared for convenience.
+
 @anchor{Release 4.2.3}
 @item 4.2.3
     Panic on all possible hash @code{Write} errors.