pppscn
2 years ago
parent
1b93aeb857
commit
581c0c2ef2
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package com.idormy.sms.forwarder.utils
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import java.io.UnsupportedEncodingException
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/**
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* Base64编码解码
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*/
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object Base64 {
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private val base64EncodeChars = charArrayOf('A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/')
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private val base64DecodeChars = byteArrayOf(-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1)
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fun encode(data: ByteArray): String {
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val sb = StringBuffer()
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val len = data.size
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var i = 0
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var b1: Int
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var b2: Int
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var b3: Int
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while (i < len) {
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b1 = ((data[i++]).toInt() and 0xff)
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if (i == len) {
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sb.append(base64EncodeChars[b1.ushr(2)])
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sb.append(base64EncodeChars[b1 and 0x3 shl 4])
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sb.append("==")
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break
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}
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b2 = (data[i++]).toInt() and 0xff
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if (i == len) {
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sb.append(base64EncodeChars[b1.ushr(2)])
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sb.append(base64EncodeChars[b1 and 0x03 shl 4 or (b2 and 0xf0).ushr(4)])
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sb.append(base64EncodeChars[b2 and 0x0f shl 2])
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sb.append("=")
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break
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}
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b3 = (data[i++]).toInt() and 0xff
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sb.append(base64EncodeChars[b1.ushr(2)])
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sb.append(base64EncodeChars[b1 and 0x03 shl 4 or (b2 and 0xf0).ushr(4)])
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sb.append(base64EncodeChars[b2 and 0x0f shl 2 or (b3 and 0xc0).ushr(6)])
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sb.append(base64EncodeChars[b3 and 0x3f])
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}
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return sb.toString()
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}
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@Throws(UnsupportedEncodingException::class)
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fun decode(str: String): ByteArray {
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val sb = StringBuffer()
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val data = str.toByteArray(charset("US-ASCII"))
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val len = data.size
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var i = 0
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var b1: Int
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var b2: Int
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var b3: Int
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var b4: Int
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while (i < len) {
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/* b1 */
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do {
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b1 = base64DecodeChars[(data[i++]).toInt()].toInt()
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} while (i < len && b1 == -1)
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if (b1 == -1) break
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/* b2 */
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do {
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b2 = base64DecodeChars[(data[i++]).toInt()].toInt()
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} while (i < len && b2 == -1)
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if (b2 == -1) break
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sb.append((b1 shl 2 or (b2 and 0x30).ushr(4)).toChar())
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/* b3 */
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do {
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b3 = data[i++].toInt()
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if (b3 == 61) return sb.toString().toByteArray(charset("ISO-8859-1"))
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b3 = base64DecodeChars[b3].toInt()
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} while (i < len && b3 == -1)
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if (b3 == -1) break
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sb.append((b2 and 0x0f shl 4 or (b3 and 0x3c).ushr(2)).toChar())
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/* b4 */
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do {
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b4 = data[i++].toInt()
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if (b4 == 61) return sb.toString().toByteArray(charset("ISO-8859-1"))
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b4 = base64DecodeChars[b4].toInt()
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} while (i < len && b4 == -1)
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if (b4 == -1) break
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sb.append((b3 and 0x03 shl 6 or b4).toChar())
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}
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return sb.toString().toByteArray(charset("ISO-8859-1"))
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}
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}
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@ -0,0 +1,210 @@
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package com.idormy.sms.forwarder.utils
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import java.io.ByteArrayOutputStream
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import java.security.KeyFactory
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import java.security.PrivateKey
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import java.security.PublicKey
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import java.security.spec.PKCS8EncodedKeySpec
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import java.security.spec.X509EncodedKeySpec
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import javax.crypto.Cipher
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/**
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* 非对称加密RSA加密和解密
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*/
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@Suppress("unused")
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object RSACrypt {
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private const val transformation = "RSA"
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private const val ENCRYPT_MAX_SIZE = 245
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private const val DECRYPT_MAX_SIZE = 256
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/**
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* 私钥加密
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* @param input 原文
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* @param privateKey 私钥
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*/
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fun encryptByPrivateKey(input: String, privateKey: PrivateKey): String {
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//创建cipher对象
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val cipher = Cipher.getInstance(transformation)
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//初始化cipher
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cipher.init(Cipher.ENCRYPT_MODE, privateKey)
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//****非对称加密****
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val byteArray = input.toByteArray()
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//分段加密
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var temp: ByteArray?
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var offset = 0 //当前偏移的位置
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val outputStream = ByteArrayOutputStream()
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//拆分input
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while (byteArray.size - offset > 0) {
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//每次最大加密245个字节
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if (byteArray.size - offset >= ENCRYPT_MAX_SIZE) {
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//剩余部分大于245
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//加密完整245
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temp = cipher.doFinal(byteArray, offset, ENCRYPT_MAX_SIZE)
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//重新计算偏移位置
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offset += ENCRYPT_MAX_SIZE
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} else {
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//加密最后一块
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temp = cipher.doFinal(byteArray, offset, byteArray.size - offset)
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//重新计算偏移位置
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offset = byteArray.size
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}
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//存储到临时的缓冲区
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outputStream.write(temp)
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}
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outputStream.close()
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return Base64.encode(outputStream.toByteArray())
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}
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/**
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* 公钥加密
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* @param input 原文
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* @param publicKey 公钥
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*/
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fun encryptByPublicKey(input: String, publicKey: PublicKey): String {
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//创建cipher对象
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val cipher = Cipher.getInstance(transformation)
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//初始化cipher
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cipher.init(Cipher.ENCRYPT_MODE, publicKey)
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//****非对称加密****
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val byteArray = input.toByteArray()
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var temp: ByteArray?
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var offset = 0 //当前偏移的位置
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val outputStream = ByteArrayOutputStream()
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//拆分input
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while (byteArray.size - offset > 0) {
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//每次最大加密117个字节
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if (byteArray.size - offset >= ENCRYPT_MAX_SIZE) {
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//剩余部分大于117
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//加密完整117
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temp = cipher.doFinal(byteArray, offset, ENCRYPT_MAX_SIZE)
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//重新计算偏移位置
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offset += ENCRYPT_MAX_SIZE
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} else {
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//加密最后一块
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temp = cipher.doFinal(byteArray, offset, byteArray.size - offset)
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//重新计算偏移位置
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offset = byteArray.size
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}
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//存储到临时的缓冲区
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outputStream.write(temp)
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}
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outputStream.close()
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return Base64.encode(outputStream.toByteArray())
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}
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/**
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* 私钥解密
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* @param input 秘文
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* @param privateKey 私钥
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*/
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fun decryptByPrivateKey(input: String, privateKey: PrivateKey): String {
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//创建cipher对象
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val cipher = Cipher.getInstance(transformation)
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//初始化cipher
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cipher.init(Cipher.DECRYPT_MODE, privateKey)
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//****非对称加密****
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val byteArray = Base64.decode(input)
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//分段解密
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var temp: ByteArray?
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var offset = 0 //当前偏移的位置
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val outputStream = ByteArrayOutputStream()
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//拆分input
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while (byteArray.size - offset > 0) {
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//每次最大解密256个字节
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if (byteArray.size - offset >= DECRYPT_MAX_SIZE) {
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temp = cipher.doFinal(byteArray, offset, DECRYPT_MAX_SIZE)
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//重新计算偏移位置
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offset += DECRYPT_MAX_SIZE
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} else {
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//加密最后一块
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temp = cipher.doFinal(byteArray, offset, byteArray.size - offset)
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//重新计算偏移位置
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offset = byteArray.size
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}
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//存储到临时的缓冲区
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outputStream.write(temp)
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}
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outputStream.close()
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return String(outputStream.toByteArray())
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}
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/**
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* 公钥解密
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* @param input 秘文
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* @param publicKey 公钥
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*/
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fun decryptByPublicKey(input: String, publicKey: PublicKey): String {
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//创建cipher对象
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val cipher = Cipher.getInstance(transformation)
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//初始化cipher
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cipher.init(Cipher.DECRYPT_MODE, publicKey)
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//****非对称加密****
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val byteArray = Base64.decode(input)
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//分段解密
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var temp: ByteArray?
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var offset = 0 //当前偏移的位置
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val outputStream = ByteArrayOutputStream()
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//拆分input
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while (byteArray.size - offset > 0) {
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//每次最大解密256个字节
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if (byteArray.size - offset >= DECRYPT_MAX_SIZE) {
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temp = cipher.doFinal(byteArray, offset, DECRYPT_MAX_SIZE)
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//重新计算偏移位置
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offset += DECRYPT_MAX_SIZE
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} else {
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//加密最后一块
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temp = cipher.doFinal(byteArray, offset, byteArray.size - offset)
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//重新计算偏移位置
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offset = byteArray.size
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}
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//存储到临时的缓冲区
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outputStream.write(temp)
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}
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outputStream.close()
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return String(outputStream.toByteArray())
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}
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fun getPrivateKey(privateKeyStr: String): PrivateKey {
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//字符串转成秘钥对对象
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val generator = KeyFactory.getInstance("RSA")
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return generator.generatePrivate(PKCS8EncodedKeySpec(Base64.decode(privateKeyStr)))
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}
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fun getPublicKey(publicKeyStr: String): PublicKey {
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//字符串转成秘钥对对象
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val kf = KeyFactory.getInstance("RSA")
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return kf.generatePublic(X509EncodedKeySpec(Base64.decode(publicKeyStr)))
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}
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}
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