Error expo build:ios

Expo Development Tools
1

I’m having problems generating (or retrieving) distribution certificates when running expo build:ios.

I’m getting the error:

:heavy_multiplication_x: Failed when trying to find previously uploaded Apple Distribution Certificate
_getCertData only takes strings and buffers.

I’m sure I’m using the right credentials when login-in on expo and apple.

  • I’ve tried with expo build:ios -c and got the same error.
  • I’ve tried deleting all distribution certificates from developer.apple.com and got the same error.
  • I’ve tried deleting and re-creating manually the distribution certificate from developer.apple.com, downloading it, converting it to p12 and providing it to expo build:ios with the right password, and the result was:

:heavy_multiplication_x: Failed to generate Apple Provisioning Profile
Reason: No cert available to make provision profile against, raw: "Make sure you were able to make a certificate prior to this step.

How can I continue? Any suggestions?

Thanks

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2

Hi! Sorry you’re having trouble with this

Reason: No cert available to make provision profile against, raw: "Make sure you were able to make a certificate prior to this step.

I ran into this earlier, and just deleted some old profiles on developer.apple.com, rebuild with the -c flag, and was all good to go. Not sure if you’ve already tried that

3

Thanks for your reply, I’ve deleted all profiles and still getting the same error.

4

I’m wondering what’s going on with this error. It’s like expo for some reason cannot fetch previously created (or none) certificates from the developer portal.

5

I have the same problem and got the same error.
I’ve tried deleting profiles from apple developer account as well.
Expo SDK 33, Expo CLI 3.0.4

× Failed when trying to find previously uploaded Apple Distribution Certificate
_getCertData only takes strings and buffers.
Error: _getCertData only takes strings and buffers.
    at _getCertData (C:\@expo\xdl@56.1.3\src\detach\IosCodeSigning.js:44:11)
    at Object.findP12CertSerialNumber (C:\@expo\xdl@56.1.3\src\detach\IosCodeSigning.js:35:20)
    at distCerts.map (C:\@expo\xdl@56.1.3\src\credentials\IosCredentials.js:43:41)
    at Array.map (<anonymous>)
    at formatDistCerts (C:\@expo\xdl@56.1.3\src\credentials\IosCredentials.js:42:20)
    at getExistingDistCerts (C:\@expo\xdl@56.1.3\src\credentials\IosCredentials.js:38:10)
    at process._tickCallback (internal/process/next_tick.js:68:7)

Any ideas?

6

The dist certs are fetched here by calling getExistingUserCredentials. Then the code tries to format them.

It looks like the fetched certs each include a P12 cert bundle which is passed in to IosCodeSigning.findP12CertSerialNumber here.

That then calls _getCertData here, which calls _getCertData, which looks like this:

function _getCertData(p12Buffer, passwordRaw) {
  if (Buffer.isBuffer(p12Buffer)) {
    p12Buffer = p12Buffer.toString('base64');
  } else if (typeof p12Buffer !== 'string') {
    throw new Error('_getCertData only takes strings and buffers.');
  }
[...]

So it seems that getExistingUserCredentials is returning a P12 cert that is invalid in some way. Maybe it’s in the wrong format?

7

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