如何在API 28中使用PackageInfo.GET_SIGNING_CERTIFICATES? [英] How to use PackageInfo.GET_SIGNING_CERTIFICATES in API 28?

问题描述

PackageManager.GET_SIGNATURES的文档说:"API级别28不推荐使用此常量.请改用GET_SIGNING_CERTIFICATES."

The documentation of PackageManager.GET_SIGNATURES says "This constant was deprecated in API level 28. Use GET_SIGNING_CERTIFICATES instead".

不幸的是，它并不安全，很容易被黑客入侵.

Unfortunately it was not secure and was easily hacked.

如何使用Android P引入的新"GET_SIGNING_CERTIFICATES"?

How can you use the new "GET_SIGNING_CERTIFICATES" introduced with Android P?

推荐答案

在 API28或更高版本中，您还应该检查 multipleSigners .

此功能将完成这项工作:
(适用于Android 9.0及更低版本的作品)

This function will do the job:
(Works for Android 9.0 and lower)

fun getApplicationSignature(packageName: String = context.packageName): List<String> {
    val signatureList: List<String>
    try {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
            // New signature
            val sig = context.packageManager.getPackageInfo(packageName, PackageManager.GET_SIGNING_CERTIFICATES).signingInfo
            signatureList = if (sig.hasMultipleSigners()) {
                // Send all with apkContentsSigners
                sig.apkContentsSigners.map {
                    val digest = MessageDigest.getInstance("SHA")
                    digest.update(it.toByteArray())
                    bytesToHex(digest.digest())
                }
            } else {
                // Send one with signingCertificateHistory
                sig.signingCertificateHistory.map {
                    val digest = MessageDigest.getInstance("SHA")
                    digest.update(it.toByteArray())
                    bytesToHex(digest.digest())
                }
            }
        } else {
            val sig = context.packageManager.getPackageInfo(packageName, PackageManager.GET_SIGNATURES).signatures
            signatureList = sig.map {
                val digest = MessageDigest.getInstance("SHA")
                digest.update(it.toByteArray())
                bytesToHex(digest.digest())
            }
        }

        return signatureList
    } catch (e: Exception) {
        // Handle error
    }
    return emptyList()
}

byteToHex 是:

fun bytesToHex(bytes: ByteArray): String {
    val hexArray = charArrayOf('0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F')
    val hexChars = CharArray(bytes.size * 2)
    var v: Int
    for (j in bytes.indices) {
        v = bytes[j].toInt() and 0xFF
        hexChars[j * 2] = hexArray[v.ushr(4)]
        hexChars[j * 2 + 1] = hexArray[v and 0x0F]
    }
    return String(hexChars)
}

这篇关于如何在API 28中使用PackageInfo.GET_SIGNING_CERTIFICATES?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！