go.cypherpunks.ru namespace usage

[gogost.git] / gost28147 / ecb.go

diff --git a/gost28147/ecb.go b/gost28147/ecb.go
new file mode 100644 (file)
index 0000000..0c47ec3
--- /dev/null
+++ b/gost28147/ecb.go
@@ -0,0 +1,54 @@
+// GoGOST -- Pure Go GOST cryptographic functions library
+// Copyright (C) 2015-2019 Sergey Matveev <stargrave@stargrave.org>
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, version 3 of the License.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package gost28147
+
+type ECBEncrypter struct {
+       c *Cipher
+}
+
+func (c *Cipher) NewECBEncrypter() *ECBEncrypter {
+       e := ECBEncrypter{c}
+       return &e
+}
+
+func (e *ECBEncrypter) CryptBlocks(dst, src []byte) {
+       for i := 0; i < len(src); i += BlockSize {
+               e.c.Encrypt(dst[i:i+BlockSize], src[i:i+BlockSize])
+       }
+}
+
+func (e *ECBEncrypter) BlockSize() int {
+       return e.c.BlockSize()
+}
+
+type ECBDecrypter struct {
+       c *Cipher
+}
+
+func (c *Cipher) NewECBDecrypter() *ECBDecrypter {
+       d := ECBDecrypter{c}
+       return &d
+}
+
+func (e *ECBDecrypter) CryptBlocks(dst, src []byte) {
+       for i := 0; i < len(src); i += BlockSize {
+               e.c.Decrypt(dst[i:i+BlockSize], src[i:i+BlockSize])
+       }
+}
+
+func (e *ECBDecrypter) BlockSize() int {
+       return e.c.BlockSize()
+}