go.mod                         |   4 +---
 go.sum                         |   2 --
 gogost.go                      |   2 +-
 gost34112012256/hkdf_test.go   |  29 +++++++++++++++++++----------
 gost34112012512/pbkdf2_test.go |  74 +++++++++++++++++++++++++++---------------------------
 gost341194/pbkdf2_test.go      | 191 ++++++++++++++++++++++++++---------------------------
 mgm/mode.go                    |   7 +++++--
 news.texi                      |   8 ++++++++

diff --git a/go.mod b/go.mod
index f0d1f67635200db18c6ea14074d3203d1f60eab82b851106a18936ba73fe097e..18525aeffb1b1772cb3253a12674fda139b3a4a357632fa7827b6758d131d869 100644
--- a/go.mod
+++ b/go.mod
@@ -1,5 +1,3 @@
 module go.cypherpunks.su/gogost/v6
 
-go 1.23
-
-require golang.org/x/crypto v0.32.0
+go 1.24
diff --git a/go.sum b/go.sum
index db4d8b670bfd92ee3830c5dc63fb02c1ffa899c91b6cc82ef3d6fa23ea45027d..473a0f4c3be8a93681a267e3b1e9a7dcda1185436fe141f7749120a303721813 100644
--- a/go.sum
+++ b/go.sum
@@ -1,2 +0,0 @@
-golang.org/x/crypto v0.32.0 h1:euUpcYgM8WcP71gNpTqQCn6rC2t6ULUPiOzfWaXVVfc=
-golang.org/x/crypto v0.32.0/go.mod h1:ZnnJkOaASj8g0AjIduWNlq2NRxL0PlBrbKVyZ6V/Ugc=
diff --git a/gogost.go b/gogost.go
index acb5158ec951226d25fd20836209ff805d9a066ce5571b96bcf27697d98bdef8..78af35e3adc806e9fa34bd9bc81f046cfc512dcbf3bf0d907f01b72e4952e364 100644
--- a/gogost.go
+++ b/gogost.go
@@ -1,4 +1,4 @@
 // Pure Go GOST cryptographic functions library.
 package gogost
 
-const Version = "6.0.2"
+const Version = "6.1.0"
diff --git a/gost34112012256/hkdf_test.go b/gost34112012256/hkdf_test.go
index 2ffa9e842a80a27a6487dbe24dd6899a2a43cfe1feacfe0c3033b403ff2cd723..987d0aece9a5ac9f97f385c6b5bc430c93cfc71304983cfba98adabf19b457b4 100644
--- a/gost34112012256/hkdf_test.go
+++ b/gost34112012256/hkdf_test.go
@@ -19,7 +19,7 @@ import (
 	"bytes"
 	"testing"
 
-	"golang.org/x/crypto/hkdf"
+	"crypto/hkdf"
 )
 
 func TestHKDF(t *testing.T) {
@@ -33,7 +33,10 @@ 		salt := []byte{
 			0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
 			0x08, 0x09, 0x0a, 0x0b, 0x0c,
 		}
-		prk := hkdf.Extract(New, ikm, salt)
+		prk, err := hkdf.Extract(New, ikm, salt)
+		if err != nil {
+			t.Fatal(err)
+		}
 		if !bytes.Equal(prk, []byte{
 			0x94, 0x7d, 0x3d, 0x99, 0x2e, 0xdc, 0x44, 0xe3,
 			0x7b, 0x32, 0x72, 0x40, 0xf1, 0x5e, 0x62, 0x91,
@@ -43,8 +46,8 @@ 		}) {
 			t.Fatal("PRK differs")
 		}
 		info := []byte{0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9}
-		okm := make([]byte, 42)
-		if _, err := hkdf.Expand(New, prk, info).Read(okm); err != nil {
+		okm, err := hkdf.Expand(New, prk, string(info), 42)
+		if err != nil {
 			t.Fatal("HKDF-Expand failed")
 		}
 		if !bytes.Equal(okm, []byte{
@@ -83,7 +86,10 @@ 			0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
 			0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
 			0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
 		}
-		prk := hkdf.Extract(New, ikm, salt)
+		prk, err := hkdf.Extract(New, ikm, salt)
+		if err != nil {
+			t.Fatal(err)
+		}
 		if !bytes.Equal(prk, []byte{
 			0xa2, 0xff, 0xcd, 0x64, 0x44, 0x45, 0xef, 0x94,
 			0x7e, 0x7e, 0xc9, 0xa8, 0x26, 0x89, 0x3d, 0x9a,
@@ -104,8 +110,8 @@ 			0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
 			0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
 			0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff,
 		}
-		okm := make([]byte, 82)
-		if _, err := hkdf.Expand(New, prk, info).Read(okm); err != nil {
+		okm, err := hkdf.Expand(New, prk, string(info), 82)
+		if err != nil {
 			t.Fatal("HKDF-Expand failed")
 		}
 		if !bytes.Equal(okm, []byte{
@@ -131,7 +137,10 @@ 			0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b,
 			0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b,
 		}
 		salt := []byte{}
-		prk := hkdf.Extract(New, ikm, salt)
+		prk, err := hkdf.Extract(New, ikm, salt)
+		if err != nil {
+			t.Fatal(err)
+		}
 		if !bytes.Equal(prk, []byte{
 			0x1f, 0xfc, 0x6d, 0x2b, 0xf9, 0x59, 0x4d, 0xfd,
 			0xf7, 0x75, 0xc2, 0xc1, 0x8f, 0xa3, 0xae, 0xcc,
@@ -141,8 +150,8 @@ 		}) {
 			t.Fatal("PRK differs")
 		}
 		info := []byte{}
-		okm := make([]byte, 42)
-		if _, err := hkdf.Expand(New, prk, info).Read(okm); err != nil {
+		okm, err := hkdf.Expand(New, prk, string(info), 42)
+		if err != nil {
 			t.Fatal("HKDF-Expand failed")
 		}
 		if !bytes.Equal(okm, []byte{
diff --git a/gost34112012512/pbkdf2_test.go b/gost34112012512/pbkdf2_test.go
index 59dbdd73aaeec35f4e241358a99b09fa9bb1150677bd744d6ccccecba808454f..c49c1a1b610038ed094455e502a74b5ace5267de6d6cf1a6344022156cdfbd74 100644
--- a/gost34112012512/pbkdf2_test.go
+++ b/gost34112012512/pbkdf2_test.go
@@ -19,19 +19,17 @@ import (
 	"bytes"
 	"testing"
 
-	"golang.org/x/crypto/pbkdf2"
+	"crypto/pbkdf2"
 )
 
 // Test vectors from http://tc26.ru/.../R_50.1.111-2016.pdf
 
 func Test1(t *testing.T) {
-	if !bytes.Equal(pbkdf2.Key(
-		[]byte("password"),
-		[]byte("salt"),
-		1,
-		64,
-		New,
-	), []byte{
+	key, err := pbkdf2.Key(New, "password", []byte("salt"), 1, 64)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !bytes.Equal(key, []byte{
 		0x64, 0x77, 0x0a, 0xf7, 0xf7, 0x48, 0xc3, 0xb1,
 		0xc9, 0xac, 0x83, 0x1d, 0xbc, 0xfd, 0x85, 0xc2,
 		0x61, 0x11, 0xb3, 0x0a, 0x8a, 0x65, 0x7d, 0xdc,
@@ -46,13 +44,11 @@ 	}
 }
 
 func Test2(t *testing.T) {
-	if !bytes.Equal(pbkdf2.Key(
-		[]byte("password"),
-		[]byte("salt"),
-		2,
-		64,
-		New,
-	), []byte{
+	key, err := pbkdf2.Key(New, "password", []byte("salt"), 2, 64)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !bytes.Equal(key, []byte{
 		0x5a, 0x58, 0x5b, 0xaf, 0xdf, 0xbb, 0x6e, 0x88,
 		0x30, 0xd6, 0xd6, 0x8a, 0xa3, 0xb4, 0x3a, 0xc0,
 		0x0d, 0x2e, 0x4a, 0xeb, 0xce, 0x01, 0xc9, 0xb3,
@@ -67,13 +63,11 @@ 	}
 }
 
 func Test4096(t *testing.T) {
-	if !bytes.Equal(pbkdf2.Key(
-		[]byte("password"),
-		[]byte("salt"),
-		4096,
-		64,
-		New,
-	), []byte{
+	key, err := pbkdf2.Key(New, "password", []byte("salt"), 4096, 64)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !bytes.Equal(key, []byte{
 		0xe5, 0x2d, 0xeb, 0x9a, 0x2d, 0x2a, 0xaf, 0xf4,
 		0xe2, 0xac, 0x9d, 0x47, 0xa4, 0x1f, 0x34, 0xc2,
 		0x03, 0x76, 0x59, 0x1c, 0x67, 0x80, 0x7f, 0x04,
@@ -88,13 +82,11 @@ 	}
 }
 
 func TestWithZero(t *testing.T) {
-	if !bytes.Equal(pbkdf2.Key(
-		[]byte("pass\x00word"),
-		[]byte("sa\x00lt"),
-		4096,
-		64,
-		New,
-	), []byte{
+	key, err := pbkdf2.Key(New, "pass\x00word", []byte("sa\x00lt"), 4096, 64)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !bytes.Equal(key, []byte{
 		0x50, 0xdf, 0x06, 0x28, 0x85, 0xb6, 0x98, 0x01,
 		0xa3, 0xc1, 0x02, 0x48, 0xeb, 0x0a, 0x27, 0xab,
 		0x6e, 0x52, 0x2f, 0xfe, 0xb2, 0x0c, 0x99, 0x1c,
@@ -109,13 +101,17 @@ 	}
 }
 
 func Test100(t *testing.T) {
-	if !bytes.Equal(pbkdf2.Key(
-		[]byte("passwordPASSWORDpassword"),
+	key, err := pbkdf2.Key(
+		New,
+		"passwordPASSWORDpassword",
 		[]byte("saltSALTsaltSALTsaltSALTsaltSALTsalt"),
 		4096,
 		100,
-		New,
-	), []byte{
+	)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !bytes.Equal(key, []byte{
 		0xb2, 0xd8, 0xf1, 0x24, 0x5f, 0xc4, 0xd2, 0x92,
 		0x74, 0x80, 0x20, 0x57, 0xe4, 0xb5, 0x4e, 0x0a,
 		0x07, 0x53, 0xaa, 0x22, 0xfc, 0x53, 0x76, 0x0b,
@@ -136,13 +132,17 @@ }
 
 func Test16777216(t *testing.T) {
 	t.Skip("takes too long")
-	if !bytes.Equal(pbkdf2.Key(
-		[]byte("password"),
+	key, err := pbkdf2.Key(
+		New,
+		"password",
 		[]byte("salt"),
 		16777216,
 		64,
-		New,
-	), []byte{
+	)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !bytes.Equal(key, []byte{
 		0x49, 0xe4, 0x84, 0x3b, 0xba, 0x76, 0xe3, 0x00,
 		0xaf, 0xe2, 0x4c, 0x4d, 0x23, 0xdc, 0x73, 0x92,
 		0xde, 0xf1, 0x2f, 0x2c, 0x0e, 0x24, 0x41, 0x72,
diff --git a/gost341194/pbkdf2_test.go b/gost341194/pbkdf2_test.go
index f0b0cbd650e0ab81559cffbeb7da0bf1d5d88aa9b67da94329255d30c0cf52cb..19fe45168aa37e6b9d8cb111ab6dd7a262e506f3016f1ab58a44cb346117c35b 100644
--- a/gost341194/pbkdf2_test.go
+++ b/gost341194/pbkdf2_test.go
@@ -20,8 +20,9 @@ 	"bytes"
 	"hash"
 	"testing"
 
+	"crypto/pbkdf2"
+
 	"go.cypherpunks.su/gogost/v6/gost28147"
-	"golang.org/x/crypto/pbkdf2"
 )
 
 func PBKDF2Hash() hash.Hash {
@@ -30,106 +31,100 @@ }
 
 // Test vectors for PBKDF2 taken from
 // http://tc26.ru/methods/containers_v1/Addition_to_PKCS5_v1_0.pdf test vectors
-func TestPBKDF2Vectors(t *testing.T) {
-	t.Run("1", func(t *testing.T) {
-		if !bytes.Equal(pbkdf2.Key(
-			[]byte("password"),
-			[]byte("salt"),
-			1,
-			32,
-			PBKDF2Hash,
-		), []byte{
-			0x73, 0x14, 0xe7, 0xc0, 0x4f, 0xb2, 0xe6, 0x62,
-			0xc5, 0x43, 0x67, 0x42, 0x53, 0xf6, 0x8b, 0xd0,
-			0xb7, 0x34, 0x45, 0xd0, 0x7f, 0x24, 0x1b, 0xed,
-			0x87, 0x28, 0x82, 0xda, 0x21, 0x66, 0x2d, 0x58,
-		}) {
-			t.FailNow()
-		}
-	})
 
-	t.Run("2", func(t *testing.T) {
-		if !bytes.Equal(pbkdf2.Key(
-			[]byte("password"),
-			[]byte("salt"),
-			2,
-			32,
-			PBKDF2Hash,
-		), []byte{
-			0x99, 0x0d, 0xfa, 0x2b, 0xd9, 0x65, 0x63, 0x9b,
-			0xa4, 0x8b, 0x07, 0xb7, 0x92, 0x77, 0x5d, 0xf7,
-			0x9f, 0x2d, 0xb3, 0x4f, 0xef, 0x25, 0xf2, 0x74,
-			0x37, 0x88, 0x72, 0xfe, 0xd7, 0xed, 0x1b, 0xb3,
-		}) {
-			t.FailNow()
-		}
-	})
+func TestPBKDF2Vectors1(t *testing.T) {
+	key, err := pbkdf2.Key(PBKDF2Hash, "password", []byte("salt"), 1, 32)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !bytes.Equal(key, []byte{
+		0x73, 0x14, 0xe7, 0xc0, 0x4f, 0xb2, 0xe6, 0x62,
+		0xc5, 0x43, 0x67, 0x42, 0x53, 0xf6, 0x8b, 0xd0,
+		0xb7, 0x34, 0x45, 0xd0, 0x7f, 0x24, 0x1b, 0xed,
+		0x87, 0x28, 0x82, 0xda, 0x21, 0x66, 0x2d, 0x58,
+	}) {
+		t.FailNow()
+	}
+}
 
-	t.Run("4096", func(t *testing.T) {
-		if !bytes.Equal(pbkdf2.Key(
-			[]byte("password"),
-			[]byte("salt"),
-			4096,
-			32,
-			PBKDF2Hash,
-		), []byte{
-			0x1f, 0x18, 0x29, 0xa9, 0x4b, 0xdf, 0xf5, 0xbe,
-			0x10, 0xd0, 0xae, 0xb3, 0x6a, 0xf4, 0x98, 0xe7,
-			0xa9, 0x74, 0x67, 0xf3, 0xb3, 0x11, 0x16, 0xa5,
-			0xa7, 0xc1, 0xaf, 0xff, 0x9d, 0xea, 0xda, 0xfe,
-		}) {
-			t.FailNow()
-		}
-	})
+func TestPBKDF2Vectors2(t *testing.T) {
+	key, err := pbkdf2.Key(PBKDF2Hash, "password", []byte("salt"), 2, 32)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !bytes.Equal(key, []byte{
+		0x99, 0x0d, 0xfa, 0x2b, 0xd9, 0x65, 0x63, 0x9b,
+		0xa4, 0x8b, 0x07, 0xb7, 0x92, 0x77, 0x5d, 0xf7,
+		0x9f, 0x2d, 0xb3, 0x4f, 0xef, 0x25, 0xf2, 0x74,
+		0x37, 0x88, 0x72, 0xfe, 0xd7, 0xed, 0x1b, 0xb3,
+	}) {
+		t.FailNow()
+	}
+}
 
-	// t.Run("16777216", func(t *testing.T) {
-	// 	if !bytes.Equal(pbkdf2.Key(
-	// 		[]byte("password"),
-	// 		[]byte("salt"),
-	// 		16777216,
-	// 		32,
-	// 		PBKDF2Hash,
-	// 	), []byte{
-	// 		0xa5, 0x7a, 0xe5, 0xa6, 0x08, 0x83, 0x96, 0xd1,
-	// 		0x20, 0x85, 0x0c, 0x5c, 0x09, 0xde, 0x0a, 0x52,
-	// 		0x51, 0x00, 0x93, 0x8a, 0x59, 0xb1, 0xb5, 0xc3,
-	// 		0xf7, 0x81, 0x09, 0x10, 0xd0, 0x5f, 0xcd, 0x97,
-	// 	}) {
-	// 		t.FailNow()
-	// 	}
-	// })
+func TestPBKDF2Vectors4096(t *testing.T) {
+	key, err := pbkdf2.Key(PBKDF2Hash, "password", []byte("salt"), 4096, 32)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !bytes.Equal(key, []byte{
+		0x1f, 0x18, 0x29, 0xa9, 0x4b, 0xdf, 0xf5, 0xbe,
+		0x10, 0xd0, 0xae, 0xb3, 0x6a, 0xf4, 0x98, 0xe7,
+		0xa9, 0x74, 0x67, 0xf3, 0xb3, 0x11, 0x16, 0xa5,
+		0xa7, 0xc1, 0xaf, 0xff, 0x9d, 0xea, 0xda, 0xfe,
+	}) {
+		t.FailNow()
+	}
+}
+
+func TestPBKDF2Vectors16777216(t *testing.T) {
+	t.Skip("takes too long")
+	key, err := pbkdf2.Key(PBKDF2Hash, "password", []byte("salt"), 16777216, 32)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !bytes.Equal(key, []byte{
+		0xa5, 0x7a, 0xe5, 0xa6, 0x08, 0x83, 0x96, 0xd1,
+		0x20, 0x85, 0x0c, 0x5c, 0x09, 0xde, 0x0a, 0x52,
+		0x51, 0x00, 0x93, 0x8a, 0x59, 0xb1, 0xb5, 0xc3,
+		0xf7, 0x81, 0x09, 0x10, 0xd0, 0x5f, 0xcd, 0x97,
+	}) {
+		t.FailNow()
+	}
+}
 
-	t.Run("many", func(t *testing.T) {
-		if !bytes.Equal(pbkdf2.Key(
-			[]byte("passwordPASSWORDpassword"),
-			[]byte("saltSALTsaltSALTsaltSALTsaltSALTsalt"),
-			4096,
-			40,
-			PBKDF2Hash,
-		), []byte{
-			0x78, 0x83, 0x58, 0xc6, 0x9c, 0xb2, 0xdb, 0xe2,
-			0x51, 0xa7, 0xbb, 0x17, 0xd5, 0xf4, 0x24, 0x1f,
-			0x26, 0x5a, 0x79, 0x2a, 0x35, 0xbe, 0xcd, 0xe8,
-			0xd5, 0x6f, 0x32, 0x6b, 0x49, 0xc8, 0x50, 0x47,
-			0xb7, 0x63, 0x8a, 0xcb, 0x47, 0x64, 0xb1, 0xfd,
-		}) {
-			t.FailNow()
-		}
-	})
+func TestPBKDF2VectorsMany(t *testing.T) {
+	key, err := pbkdf2.Key(
+		PBKDF2Hash,
+		"passwordPASSWORDpassword",
+		[]byte("saltSALTsaltSALTsaltSALTsaltSALTsalt"),
+		4096,
+		40,
+	)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !bytes.Equal(key, []byte{
+		0x78, 0x83, 0x58, 0xc6, 0x9c, 0xb2, 0xdb, 0xe2,
+		0x51, 0xa7, 0xbb, 0x17, 0xd5, 0xf4, 0x24, 0x1f,
+		0x26, 0x5a, 0x79, 0x2a, 0x35, 0xbe, 0xcd, 0xe8,
+		0xd5, 0x6f, 0x32, 0x6b, 0x49, 0xc8, 0x50, 0x47,
+		0xb7, 0x63, 0x8a, 0xcb, 0x47, 0x64, 0xb1, 0xfd,
+	}) {
+		t.FailNow()
+	}
+}
 
-	t.Run("zero byte", func(t *testing.T) {
-		if !bytes.Equal(pbkdf2.Key(
-			[]byte("pass\x00word"),
-			[]byte("sa\x00lt"),
-			4096,
-			20,
-			PBKDF2Hash,
-		), []byte{
-			0x43, 0xe0, 0x6c, 0x55, 0x90, 0xb0, 0x8c, 0x02,
-			0x25, 0x24, 0x23, 0x73, 0x12, 0x7e, 0xdf, 0x9c,
-			0x8e, 0x9c, 0x32, 0x91,
-		}) {
-			t.FailNow()
-		}
-	})
+func TestPBKDF2VectorsZeroByte(t *testing.T) {
+	key, err := pbkdf2.Key(PBKDF2Hash, "pass\x00word", []byte("sa\x00lt"), 4096, 20)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !bytes.Equal(key, []byte{
+		0x43, 0xe0, 0x6c, 0x55, 0x90, 0xb0, 0x8c, 0x02,
+		0x25, 0x24, 0x23, 0x73, 0x12, 0x7e, 0xdf, 0x9c,
+		0x8e, 0x9c, 0x32, 0x91,
+	}) {
+		t.FailNow()
+	}
 }
diff --git a/mgm/mode.go b/mgm/mode.go
index c8e99b23b9a940e830dc2092cd57a465a87a8990f1b1f9b176379090494d6efe..2494a54d9f118a2c690b20a2dd3e6909382ab38141d2557050ca05224c046d8b 100644
--- a/mgm/mode.go
+++ b/mgm/mode.go
@@ -173,8 +173,11 @@ 	mgm.icn[0] &= 0x7F
 	mgm.cipher.Encrypt(mgm.bufP, mgm.icn) // Y_1 = E_K(0 || ICN)
 	for len(in) >= mgm.BlockSize {
 		mgm.cipher.Encrypt(mgm.bufC, mgm.bufP) // E_K(Y_i)
-		subtle.XORBytes(out, mgm.bufC, in)     // C_i = P_i (xor) E_K(Y_i)
-		incr(mgm.bufP[mgm.BlockSize/2:])       // Y_i = incr_r(Y_{i-1})
+		// subtle.XORBytes panic because of partial buffer overlapping
+		for i := 0; i < mgm.BlockSize; i++ {   // C_i = P_i (xor) E_K(Y_i)
+			out[i] = mgm.bufC[i] ^ in[i]
+		}
+		incr(mgm.bufP[mgm.BlockSize/2:]) // Y_i = incr_r(Y_{i-1})
 		out = out[mgm.BlockSize:]
 		in = in[mgm.BlockSize:]
 	}
diff --git a/news.texi b/news.texi
index dc96b3dd1de6044d12569a5285f540173a2a8acc2018979bceb2eabed11c4199..5bba83c1c558a4d81091e72915f5930ddfc934dd688c8ad8f6d8a49bb6d39003 100644
--- a/news.texi
+++ b/news.texi
@@ -3,6 +3,14 @@ @unnumbered News
 
 @table @strong
 
+@anchor{Release 6.1.0}
+@item 6.1.0
+    @itemize
+    @item Fixed workability with Go 1.24's @code{subtle.XORBytes}
+    @item Go 1.24 is required now because of
+        @code{crypto/hkdf} and @code{crypto/pbkdf2}
+    @end itemize
+
 @anchor{Release 6.0.2}
 @item 6.0.2
 Minor trivial changes.