[英]How to pass BigInteger to a Signature function
Here I'm implementing digital signature using RSA. 在这里,我正在使用RSA实现数字签名。 I read a plain text from a file and get MD5 ie instance of a MessageDigest of the plain text and converting that plain text to BigInteger here this bigInteger should be signed.
我从文件中读取纯文本,然后获取MD5,即纯文本的MessageDigest实例,并将该纯文本转换为BigInteger,此处应对此bigInteger进行签名。
MessageDigest m1 = MessageDigest.getInstance("MD5");
m1.update(bFile);
byte [] digest1 = m1.digest();
for(int i=0; i < digest1.length ; i++){
System.out.println("b["+i+"]="+digest1[i]);
}
BigInteger bi = new BigInteger(digest1);
//here I dont know how to pass BigInteger to Signature function. //这里我不知道如何将BigInteger传递给Signature函数。
Could someone please help me with it. 有人可以帮我吗。
You don't. 你不知道 You get the bytes out of the BigInteger and you pass those.
您从BigInteger中获取字节,然后将其传递。
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