How to implement RSA algorithm by Java
Editor to share with you Java how to achieve RSA algorithm, I believe that most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to understand it!
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Package rsa
Import java.math.BigInteger
Public class RSA {
Private long p,q,e,d,n
Public RSA () {
Int pIndex = (int) (Math.random () * 10)
Int qIndex
Int eIndex
Do {
QIndex = (int) (Math.random () * 10)
}
While (qIndex==pIndex)
Do {
EIndex = (int) (Math.random () * 10)
}
While (eIndex==pIndex | | eIndex==pIndex)
P = 1033
Q = 2017
E = 29437
N = puniq
D = calculateD ()
}
Private long calculateD () {
Long t0 = 0, T1 = 1, T2 =-1
Long R0 = (pmae1) * (qmer1), m = r0Magi R1 = e, R2 =-1
Do {
Long Q = r0/r1
R2 = r0-r1*q
If (R2 benchmark 0) break
T2 = t0-T1 / Q
While (t2pragm) {
T2% = m
}
R0 = R1
R1 = R2
T0 = T1
T1 = T2
} while (R2 cycles 0)
If (r1room1) {
Return 0
}
Else {
Return t2
}
}
Public long getE () {
Return e
}
Public long getN () {
Return n
}
Public long getD () {
Return d
}
Public BigInteger encode (BigInteger data) {
Return pow (data,d) .mod (new BigInteger (n + ""))
}
Public BigInteger decode (BigInteger code) {
Return pow (code,e) .mod (new BigInteger (n + ""))
}
Public BigInteger pow (BigInteger data,long p) {
Data = data.pow ((int) p)
Return data
}
Public static void main (String args []) {
RSA rsa = new RSA ()
BigInteger data = new BigInteger ("222222")
Long oldtime = System.currentTimeMillis ()
BigInteger code = rsa.encode (data)
Long newtime = System.currentTimeMillis ()
Double codetime = (double) (newtime-oldtime) / 1000
Oldtime = System.currentTimeMillis ()
BigInteger decode = rsa.decode (code)
Newtime = System.currentTimeMillis ()
Double decodetime = (double) (newtime-oldtime) / 1000
System.out.println ("privateKey:" + rsa.d)
System.out.println ("publickKey:" + rsa.e)
System.out.println ("N:" + rsa.n)
System.out.println ("data:" + data)
System.out.println ("code:" + code+ "time:" + codetime)
System.out.println ("decode:" + decode+ "time:" + decodetime)
}
} these are all the contents of the article "how to implement the RSA algorithm in Java". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!
