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修复签名方法 #4

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修复签名方法 #4

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77 changes: 47 additions & 30 deletions src/main/java/com/qcloud/image/sign/Sign.java
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Original file line number Diff line number Diff line change
Expand Up @@ -11,35 +11,52 @@
*/
public class Sign {

/**
* 返回图片识别的签名
*
* @param cred
* 包含用户秘钥信息
* @param bucketName
* bucket名
* @param expired
* 超时时间
* @return 返回base64编码的字符串
* @throws AbstractImageException 异常
*/
public static String appSign(Credentials cred, String bucketName, long expired) throws AbstractImageException {
int appId = cred.getAppId();
String secretId = cred.getSecretId();
String secretKey = cred.getSecretKey();
long now = System.currentTimeMillis() / 1000;
int rdm = Math.abs(new Random().nextInt());
String plainText = String.format("a=%d&b=%s&k=%s&t=%d&e=%d", appId, bucketName, secretId, now, now+expired);
byte[] hmacDigest;
try {
hmacDigest = CommonCodecUtils.HmacSha1(plainText, secretKey);
} catch (Exception e) {
throw new UnknownException(e.getMessage());
}
byte[] signContent = new byte[hmacDigest.length + plainText.getBytes().length];
System.arraycopy(hmacDigest, 0, signContent, 0, hmacDigest.length);
System.arraycopy(plainText.getBytes(), 0, signContent, hmacDigest.length, plainText.getBytes().length);

return CommonCodecUtils.Base64Encode(signContent);
/**
* 返回万象图片的多次有效签名
*
* @param cred 包含用户秘钥信息
* @param bucketName bucket名
* @param expired 超时时间
* @return 返回base64编码的字符串
* @throws AbstractImageException 异常
*/
public static String appSign(Credentials cred, String bucketName, long expired) throws AbstractImageException {
return appSign(cred, bucketName, "", expired);
}

/**
* 返回万象图片特定资源的多次有效签名
*
* @param cred 包含用户秘钥信息
* @param bucketName bucket名
* @param fileid 特定资源（会验证与当前操作的文件路径是否一致）
* @param expired 超时时间
* @return 返回base64编码的字符串
* @throws AbstractImageException 异常
*/
public static String appSign(Credentials cred, String bucketName, String fileid, long expired) throws AbstractImageException {
return generateSignature(cred, bucketName, fileid, expired);
}

private static String generateSignature(Credentials cred, String bucketName, String fileid, long expired) throws AbstractImageException {
int appId = cred.getAppId();
String secretId = cred.getSecretId();
String secretKey = cred.getSecretKey();
int rdm = Math.abs(new Random().nextInt());
long now = System.currentTimeMillis() / 1000;

String plainText = String.format("a=%d&b=%s&k=%s&t=%d&e=%d&r=%d&f=%s", appId, bucketName, secretId, now, now + expired, rdm, fileid);

byte[] hmacDigest;
try {
hmacDigest = CommonCodecUtils.HmacSha1(plainText, secretKey);
} catch (Exception e) {
throw new UnknownException(e.getMessage());
}
byte[] signContent = new byte[hmacDigest.length + plainText.getBytes().length];
System.arraycopy(hmacDigest, 0, signContent, 0, hmacDigest.length);
System.arraycopy(plainText.getBytes(), 0, signContent, hmacDigest.length, plainText.getBytes().length);

return CommonCodecUtils.Base64Encode(signContent);
}
}