ERROR Error: Exception in HostFunction: <unknown>, js engine: hermes

[rpatidar]

i am seeing exception

ERROR Error: Exception in HostFunction: , js engine: hermes

i have a hash created with java code but need to verfiy with reat-native in java we are using SHA256withRSA

exception is coming with below code

    pubKey = `MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAskBomu02R4n6GTY/36+3
    DKQOE2BAL9NR4142LnBsqa5wsDxj7y742aBVxcm0KCeuKq1Tkh/344PHoWiohuHG
    70Q1YSzzRiaCxfeOtDKITWCHOsdCUMvrNESZCy5giFU4DeXPn1YFwKKAmAtAxyRc
    dVb2DyJn4V0aUVP/QvP3JXqL+HN0kj3gqIVmIMalMD0vgo5LI1fJYu/6skaX+SZn
    /suCGDAtTr7i4vx2qnCdMlnYtFbclSrh/h96/q/g0P8VIEZvrZZZUNF32rkVofCS
    YciP/JaS580I8a6kHe61is+gyn/6ugL5ea066u6bIEj80oC202e/qih01pJSceuR
    awIDAQAB`
    
    console.log(base64ToBytes(response.payload))
    verifyResult = rnqc.createVerify("RSA-SHA256").update(base64ToBytes(response.payload)).verify({
      key: base64ToBytes(pubKey),
      //padding: rnqc.constants.RSA_PKCS1_PADDING,
      //saltLength: 32,
    }, base64ToBytes(response.signature))

[abubakarasifmughal]

I am also facing the same error

 ERROR  Error: Exception in HostFunction: <unknown>, js engine: hermes
 ERROR  Invariant Violation: "main" has not been registered. This can happen if:
* Metro (the local dev server) is run from the wrong folder. Check if Metro is running, stop it and restart it in the current project.
* A module failed to load due to an error and `AppRegistry.registerComponent` wasn't called., js engine: hermes

[Vighnesh1400]

I am also facing the same error

 ERROR  Error: Exception in HostFunction: <unknown>, js engine: hermes
 ERROR  Invariant Violation: "main" has not been registered. This can happen if:
* Metro (the local dev server) is run from the wrong folder. Check if Metro is running, stop it and restart it in the current project.
* A module failed to load due to an error and `AppRegistry.registerComponent` wasn't called., js engine: hermes

Hi have you got the fix, I am also facing this issue.

[adriansotoh]

I have the same issue.

This in my code. export const encryptData = async (data) => { try { const publicKeyRF = await RNFS.readFile(publicKeyFilePath, "utf8"); const bufferVal = Buffer.from(data, "utf8") const dataEncryp = Crypto.publicEncrypt( { key: publicKeyRF, padding: Crypto.constants.RSA_PKCS1_PADDING, }, bufferVal ).toString("base64"); return dataEncryp; } catch (error) { console.log("Error") console.log(error) return null; } };

The console show this error: [Error: Exception in HostFunction: ]

[rpatidar]

i don't remember how i actually fixed this worked for me.

import { RSA, RSAKeychain } from "react-native-rsa-native";


    const publicKey = `-----BEGIN PUBLIC KEY-----
    YourPubKey
    -----END PUBLIC KEY-----`;
    const valid = await RSA.verifyWithAlgorithm(
      signedPayload.signature,
      signedPayload.payload,
      publicKey,
      RSA.SHA256withRSA
    );

[JoelDeonDsouza]

I am also facing the same error

 ERROR  Error: Exception in HostFunction: <unknown>, js engine: hermes
 ERROR  Invariant Violation: "main" has not been registered. This can happen if:
* Metro (the local dev server) is run from the wrong folder. Check if Metro is running, stop it and restart it in the current project.
* A module failed to load due to an error and `AppRegistry.registerComponent` wasn't called., js engine: hermes

Hi have you got the fix, I am also facing this issue.

I encountered a similar issue, which turned out to be related to a package problem specifically with react-native-reanimated. For troubleshooting steps, you can refer to: https://docs.swmansion.com/react-native-reanimated/docs/guides/troubleshooting/#failed-to-create-a-worklet

[sg1101]

I got the same error and was able to resolve it. The error was with react-native-reanimated.

Follow the installation section on this link - https://docs.swmansion.com/react-native-reanimated/docs/fundamentals/getting-started/#step-2-add-reanimateds-babel-plugin

Step 1: Install the package Install react-native-reanimated package from npm:

EXPO NPM YARN npx expo install react-native-reanimated

Step 2: Add Reanimated's babel plugin Add react-native-reanimated/plugin plugin to your babel.config.js.

module.exports = { presets: [ ... // don't add it here :) ], plugins: [ ... 'react-native-reanimated/plugin', ], };

CAUTION react-native-reanimated/plugin has to be listed last.

Why do I need this?

Step 3: Clear Metro bundler cache (recommended) EXPO NPM YARN npx expo start -c

[sethfriman]

I also had this error which seemed to be a result of being on expo 50 and react-native-reanimated 3.8.1. I was able to resolve it by downgrading to react-native-reanimated 3.6.3 and was then able to open and run my app on Expo Go

[kavinraju]

Thank you @sethfriman this works...

[boorad]

Is this still broken with 0.7.0-rc.x release candidates?

[pandisFox]

Is this still broken with 0.7.0-rc.x release candidates?

on 0.7.0-rc.4 I get this:

❌  (node_modules/react-native-quick-crypto/cpp/Utils/MGLUtils.cpp:9:10)
#include <string>
#include "base64.h"
^ 'base64.h' file not found

on the current version I get the error same as OP.

"react-native": "0.73.4" "react-native-quick-base64": "2.1.2",

removing react-native-reanimated doesn't fix the issue for me.

@boorad also can't run the package on a fresh react native setup (without expo). Same error as above on 0.7.0-rc.4, both ios and android:

node_modules/react-native-quick-crypto/cpp/Utils/MGLUtils.cpp:9:10: fatal error: 'base64.h' file not found
  #include "base64.h"
           ^~~~~~~~~~
  1 error generated.
  [13/27] Building CXX object CMakeFiles/reactnativequickcrypto.dir/Users/x_modules/react-native-quick-crypto/cpp/Random/MGLRandomHostObject.cpp.o
  [14/27] Building CXX object CMakeFiles/reactnativequickcrypto.dir/Users/x_modules/react-native-quick-crypto/cpp/fastpbkdf2/MGLPbkdf2HostObject.cpp.o
  [15/27] Building CXX object CMakeFiles/reactnativequickcrypto.dir/Users/x_modules/react-native-quick-crypto/cpp/JSIUtils/MGLTypedArray.cpp.o
  [16/27] Building CXX object CMakeFiles/reactnativequickcrypto.dir/Users/x_modules/react-native-quick-crypto/cpp/Cipher/MGLRsa.cpp.o
  [17/27] Building CXX object CMakeFiles/reactnativequickcrypto.dir/Users/x_modules/react-native-quick-crypto/cpp/Cipher/MGLGenerateKeyPairSyncInstaller.cpp.o
  [18/27] Building CXX object CMakeFiles/reactnativequickcrypto.dir/Users/x_modules/react-native-quick-crypto/cpp/Sig/MGLSignInstaller.cpp.o
  [19/27] Building CXX object CMakeFiles/reactnativequickcrypto.dir/Users/x_modules/react-native-quick-crypto/cpp/Cipher/MGLCipherHostObject.cpp.o
  [20/27] Building CXX object CMakeFiles/reactnativequickcrypto.dir/Users/x_modules/react-native-quick-crypto/cpp/MGLQuickCryptoHostObject.cpp.o
  [21/27] Building CXX object CMakeFiles/reactnativequickcrypto.dir/Users/x_modules/react-native-quick-crypto/cpp/Sig/MGLVerifyInstaller.cpp.o
  [22/27] Building CXX object CMakeFiles/reactnativequickcrypto.dir/Users/x_modules/react-native-quick-crypto/cpp/webcrypto/MGLWebCrypto.cpp.o
  [23/27] Building CXX object CMakeFiles/reactnativequickcrypto.dir/Users/x_modules/react-native-quick-crypto/cpp/Cipher/MGLGenerateKeyPairInstaller.cpp.o
  [24/27] Building CXX object CMakeFiles/reactnativequickcrypto.dir/Users/x_modules/react-native-quick-crypto/cpp/Sig/MGLSignHostObjects.cpp.o
  [25/27] Building CXX object CMakeFiles/reactnativequickcrypto.dir/Users/x_modules/react-native-quick-crypto/cpp/MGLKeys.cpp.o
  ninja: build stopped: subcommand failed.
  
  C++ build system [build] failed while executing:
      /Users/x/Library/Android/sdk/cmake/3.22.1/bin/ninja \
        -C \
        /Users/x/node_modules/react-native-quick-crypto/android/.cxx/Debug/51zm2n4k/arm64-v8a \
        reactnativequickcrypto
    from /Users/x/node_modules/react-native-quick-crypto/android

* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.
> Get more help at https://help.gradle.org.

[boorad]

I can probably close this because you're seeing the same thing as #291. Reopen if the HostFunction msg is still present.

[Fabian-Lobnig]

i am seeing exception

ERROR Error: Exception in HostFunction: , js engine: hermes

i have a hash created with java code but need to verfiy with reat-native in java we are using SHA256withRSA

exception is coming with below code

    pubKey = `MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAskBomu02R4n6GTY/36+3
    DKQOE2BAL9NR4142LnBsqa5wsDxj7y742aBVxcm0KCeuKq1Tkh/344PHoWiohuHG
    70Q1YSzzRiaCxfeOtDKITWCHOsdCUMvrNESZCy5giFU4DeXPn1YFwKKAmAtAxyRc
    dVb2DyJn4V0aUVP/QvP3JXqL+HN0kj3gqIVmIMalMD0vgo5LI1fJYu/6skaX+SZn
    /suCGDAtTr7i4vx2qnCdMlnYtFbclSrh/h96/q/g0P8VIEZvrZZZUNF32rkVofCS
    YciP/JaS580I8a6kHe61is+gyn/6ugL5ea066u6bIEj80oC202e/qih01pJSceuR
    awIDAQAB`
    
    console.log(base64ToBytes(response.payload))
    verifyResult = rnqc.createVerify("RSA-SHA256").update(base64ToBytes(response.payload)).verify({
      key: base64ToBytes(pubKey),
      //padding: rnqc.constants.RSA_PKCS1_PADDING,
      //saltLength: 32,
    }, base64ToBytes(response.signature))

Hello everyone,

I just found out that on my side, this happened because I was inputting Uint8Array into the .update function of createVerify, it also happened when decrypting with RSA

@margelo solution: Looking at the code in Util.ts (binaryLikeToArrayBuffer) you try to return an ArrayBuffer

// TODO add further binary types to BinaryLike, UInt8Array and so for have this array as property
  if (ArrayBuffer.isView(input)) {
    return input.buffer;
  }

This works for the browser and NodeJS but in react-native there is no .buffer property(at least on my version - 0.72.7)

Temporary workaround I did a Buffer.from in front of all binary inputs e.g.

const data = Uint8Array.from([1,2,3])
const verify = createVerify(alg)
verify.update(Buffer.from(data))
...