From 621d83a6f114ead4a31214a0cd870893b5243a0a Mon Sep 17 00:00:00 2001
From: Jianwei Mao <maojianwei2012@126.com>
Date: Sun, 31 Dec 2023 08:59:13 +0800
Subject: [PATCH 1/3] allow to use input iv.

Signed-off-by: Jianwei Mao <maojianwei2012@126.com>
---
 sm4/sm4.go | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/sm4/sm4.go b/sm4/sm4.go
index 0e301deb..1778795b 100644
--- a/sm4/sm4.go
+++ b/sm4/sm4.go
@@ -299,7 +299,7 @@ func SetIV(iv []byte) error {
 	return nil
 }
 
-func Sm4Cbc(key []byte, in []byte, mode bool) (out []byte, err error) {
+func Sm4Cbc(key []byte, in []byte, mode bool, ivInput ...[]byte) (out []byte, err error) {
 	if len(key) != BlockSize {
 		return nil, errors.New("SM4: invalid key size " + strconv.Itoa(len(key)))
 	}
@@ -310,7 +310,14 @@ func Sm4Cbc(key []byte, in []byte, mode bool) (out []byte, err error) {
 		inData = in
 	}
 	iv := make([]byte, BlockSize)
-	copy(iv, IV)
+	if ivInput != nil {
+		if len(ivInput[0]) != BlockSize {
+			return nil, errors.New("SM4: invalid iv size")
+		}
+		copy(iv, ivInput[0])
+	} else {
+		copy(iv, IV)
+	}
 	out = make([]byte, len(inData))
 	c, err := NewCipher(key)
 	if err != nil {

From 95cd236e1dca172d950cde21fc81fdd25de6840f Mon Sep 17 00:00:00 2001
From: Jianwei Mao <maojianwei2016@126.com>
Date: Sat, 1 Mar 2025 23:42:33 +0800
Subject: [PATCH 2/3] Create go.yml

---
 .github/workflows/go.yml | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 .github/workflows/go.yml

diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
new file mode 100644
index 00000000..cdf5597a
--- /dev/null
+++ b/.github/workflows/go.yml
@@ -0,0 +1,33 @@
+# This workflow will build a golang project
+# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-go
+
+name: Go
+
+on:
+  push:
+    branches: [ "*" ]
+    # Build semver tags as releases.
+    tags: [ '*' ]
+  pull_request:
+    branches: [ "*" ]
+    # Build semver tags as releases.
+    tags: [ '*' ]
+  workflow_dispatch:
+
+jobs:
+
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Set up Go
+      uses: actions/setup-go@v4
+      with:
+        go-version: '1.20'
+
+    - name: Build
+      run: go build -v ./...
+
+    - name: Test
+      run: go test -v ./...

From 24ab19f6732b2d3eec1cb9c8818aaa127c7b2d7a Mon Sep 17 00:00:00 2001
From: Jianwei Mao <maojianwei2016@126.com>
Date: Sat, 1 Mar 2025 23:44:21 +0800
Subject: [PATCH 3/3] Update go.yml

---
 .github/workflows/go.yml | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index cdf5597a..968ba538 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -17,14 +17,19 @@ on:
 jobs:
 
   build:
-    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        os: ["windows-latest", "ubuntu-latest", "ubuntu-22.04", "ubuntu-20.04", "macos-latest"]
+        go-version: ["1.24", "1.23", "1.22", "1.21", "1.20", "1.19", "1.18"]
+    runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v4
 
     - name: Set up Go
-      uses: actions/setup-go@v4
+      uses: actions/setup-go@v5
       with:
-        go-version: '1.20'
+        go-version: ${{ matrix.go-version }}
 
     - name: Build
       run: go build -v ./...