Java加解密之RSA使用
Data must not be longer than 117 bytes异常
在利用数字证书加密时,会出现这样的异常 :Data must not be longer than 117 bytes。
解密时也会出现这样的异常。
解决办法是:分段加密和分段解密
// 加密时超过117字节就报错。为此采用分段加密的办法来加密
StringBuilder sb = new StringBuilder();
for (int i = 0; i < data.length; i += 100) {
byte[] doFinal = cipher.doFinal(ArrayUtils.subarray(data, i, i + 100));
sb.append(new String(doFinal));
dataReturn = ArrayUtils.addAll(dataReturn, doFinal);
}
// 解密时超过128字节就报错。为此采用分段解密的办法来解密
StringBuilder sb = new StringBuilder();
for (int i = 0; i < data.length; i += 128) {
byte[] doFinal = cipher.doFinal(ArrayUtils.subarray(data, i, i + 128));
sb.append(new String(doFinal));
}
dataReturn = sb.toString();
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