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chore(phone-as-device): app-481 get private key from Keystore #9

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Merged
merged 1 commit into from
Jul 12, 2023
Merged

chore(phone-as-device): app-481 get private key from Keystore #9

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2 changes: 1 addition & 1 deletion README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -42,7 +42,7 @@ Certificates and a private key are stored in a device specific key store.
MqttClient.setIdentity({
caCertPem: IOT_CA_CERT, // PEM representation string of a root certificate
certPem: IOT_CERT, // PEM representation string of a client certificate
keyPem: IOT_KEY, // PEM representation string of a private key
keyTag: IOT_KEY, // key tag of the private key in Keystore/Keychain
keyStoreOptions, // options for a device specific key store. may be omitted
})
.then(() => {
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2 changes: 1 addition & 1 deletion android/build.gradle
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Expand Up @@ -29,7 +29,7 @@ android {
compileSdkVersion getExtOrIntegerDefault('compileSdkVersion')
buildToolsVersion getExtOrDefault('buildToolsVersion')
defaultConfig {
minSdkVersion 16
minSdkVersion 26
targetSdkVersion getExtOrIntegerDefault('targetSdkVersion')
versionCode 1
versionName "1.0"
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41 changes: 1 addition & 40 deletions android/src/main/java/com/github/emotokcak/reactnative/mqtt/PEMLoader.kt
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Original file line number Diff line number Diff line change
@@ -1,12 +1,7 @@
package com.github.emotokcak.reactnative.mqtt

import java.io.ByteArrayInputStream
import java.security.KeyFactory
import java.security.PrivateKey
import java.security.cert.CertificateFactory
import java.security.cert.X509Certificate
import java.security.spec.PKCS8EncodedKeySpec
import java.util.Base64

/** Utility to read a certificate and key from a PEM text. */
object PEMLoader {
Expand All @@ -28,40 +23,6 @@ object PEMLoader {
fun loadX509CertificateFromString(pem: String): X509Certificate {
val certificateFactory = CertificateFactory.getInstance("X.509")
return certificateFactory.generateCertificate(pem.byteInputStream())
as X509Certificate
}

/**
* Loads an RSA private key from a given PEM text.
*
* `pem` has to start with "-----BEGIN RSA PRIVATE KEY-----"
* and end with "-----END RSA PRIVATE KEY-----".
*
* @param pem
*
* PEM representation of an RSA private key.
*
* @throws InvalidKeySpecException
*
* If `pem` is invalid.
*
* @throws NoSuchAlgorithmException
*
* If the algorithm "RSA" is not supported.
*/
@JvmStatic
fun loadPrivateKeyFromString(pem: String): PrivateKey {
val isRSA = pem.startsWith("-----BEGIN RSA PRIVATE KEY-----")
val pemContents = pem
.replace("-----BEGIN RSA PRIVATE KEY-----", "")
.replace("-----END RSA PRIVATE KEY-----", "")
.replace("-----BEGIN EC PRIVATE KEY-----", "")
.replace("-----END EC PRIVATE KEY-----", "")
.replace("-----BEGIN PRIVATE KEY-----", "")
.replace("-----END PRIVATE KEY-----", "")
val data = Base64.getMimeDecoder().decode(pemContents)
val keySpec = PKCS8EncodedKeySpec(data)
val keyFactory = KeyFactory.getInstance(if (isRSA) "RSA" else "EC")
return keyFactory.generatePrivate(keySpec)
as X509Certificate
}
}
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