为了避免对加密数据进行攻击，同时在传输 CryptoDataFormat 时也可以根据可配置的 MAC 算法为加密交换内容计算消息身份验证代码。在加密后，计算的 HMAC 会附加到流中。它与解密阶段的流分离。对该 MAC 进行重新计算并验证，并根据传输中的传输中没有修改的问题。有关 Message Authentication Codes 的更多信息，请参阅 http://en.wikipedia.org/wiki/HMAC
KeyGenerator generator = KeyGenerator.getInstance("DES");
CryptoDataFormat cryptoFormat = new CryptoDataFormat("DES", generator.generateKey());
cryptoFormat.setShouldAppendHMAC(true);
from("direct:hmac")
.marshal(cryptoFormat)
.to("mock:encrypted")
.unmarshal(cryptoFormat)
.to("mock:unencrypted");
KeyGenerator generator = KeyGenerator.getInstance("DES");
CryptoDataFormat cryptoFormat = new CryptoDataFormat("DES", generator.generateKey());
cryptoFormat.setShouldAppendHMAC(true);
from("direct:hmac")
.marshal(cryptoFormat)
.to("mock:encrypted")
.unmarshal(cryptoFormat)
.to("mock:unencrypted");
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<crypto id="hmac" algorithm="DES" keyRef="desKey" shouldAppendHMAC="true" />
<crypto id="hmac" algorithm="DES" keyRef="desKey" shouldAppendHMAC="true" />
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默认情况下，HMAC 使用 HmacSHA1 mac 算法计算，虽然可以通过提供不同的算法名称来轻松更改。请查看这里了解如何通过配置的安全供应商提供哪些算法
KeyGenerator generator = KeyGenerator.getInstance("DES");
CryptoDataFormat cryptoFormat = new CryptoDataFormat("DES", generator.generateKey());
cryptoFormat.setShouldAppendHMAC(true);
cryptoFormat.setMacAlgorithm("HmacMD5");
from("direct:hmac-algorithm")
.marshal(cryptoFormat)
.to("mock:encrypted")
.unmarshal(cryptoFormat)
.to("mock:unencrypted");
KeyGenerator generator = KeyGenerator.getInstance("DES");
CryptoDataFormat cryptoFormat = new CryptoDataFormat("DES", generator.generateKey());
cryptoFormat.setShouldAppendHMAC(true);
cryptoFormat.setMacAlgorithm("HmacMD5");
from("direct:hmac-algorithm")
.marshal(cryptoFormat)
.to("mock:encrypted")
.unmarshal(cryptoFormat)
.to("mock:unencrypted");
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<crypto id="hmac-algorithm" algorithm="DES" keyRef="desKey" macAlgorithm="HmacMD5" shouldAppendHMAC="true" />
<crypto id="hmac-algorithm" algorithm="DES" keyRef="desKey" macAlgorithm="HmacMD5" shouldAppendHMAC="true" />
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