make aes ctr encryption can set iv

CHANGELOG.md

@@ -5,6 +5,9 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [5.6.58]
+- make aes ctr encryption mode can set iv
+
 ## [5.6.57]
 - update AudioAuditing api
 - add VideoAuditing new params

pom.xml

@@ -4,7 +4,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.qcloud</groupId>
     <artifactId>cos_api</artifactId>
-    <version>5.6.57</version>
+    <version>5.6.58</version>
     <packaging>jar</packaging>
     <name>cos-java-sdk</name>
     <description>java sdk for qcloud cos</description>

src/main/java/com/qcloud/cos/internal/crypto/AesCtr.java

@@ -20,14 +20,16 @@
 
 class AesCtr extends ContentCryptoScheme {
 
+    private byte[] iv = null;
+
     @Override String getKeyGeneratorAlgorithm() { return AES_GCM.getKeyGeneratorAlgorithm(); }
     @Override String getCipherAlgorithm() { return "AES/CTR/NoPadding"; }
     @Override int getKeyLengthInBits() { return AES_GCM.getKeyLengthInBits(); }
     @Override int getBlockSizeInBytes() { return AES_GCM.getBlockSizeInBytes(); }
     @Override int getIVLengthInBytes() { return 16; }
     @Override long getMaxPlaintextSize() {  return MAX_CTR_BYTES;  }
-    @Override byte[] getIV() { return null; }
-    @Override void setIV(byte[] iv) {}
+    @Override byte[] getIV() { return this.iv; }
+    @Override void setIV(byte[] iv) { this.iv = iv; }
 
     @Override
     byte[] adjustIV(byte[] iv, long byteOffset) {