OpenSSL::PKey.read fails for valid pkey

[segiddins]

#!/usr/bin/env ruby

require 'rubygems'
require 'openssl'

puts OpenSSL::OPENSSL_VERSION

b64 = "MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEbfwR+RJudXscgRBRpKX1XFDy3PyudDxz/SfnRi1fT8ekpfBd2O1uoz7jr3Z8nKzxA69EUQ+eFCFI3zeubPWU7w=="
key = OpenSSL::PKey.read(b64.unpack1("m"))

puts key.to_text

pp OpenSSL::Digest::SHA256.hexdigest(key.public_to_der)

on mri:

OpenSSL 3.3.0 9 Apr 2024
Public-Key: (256 bit)
pub:
    04:6d:fc:11:f9:12:6e:75:7b:1c:81:10:51:a4:a5:
    f5:5c:50:f2:dc:fc:ae:74:3c:73:fd:27:e7:46:2d:
    5f:4f:c7:a4:a5:f0:5d:d8:ed:6e:a3:3e:e3:af:76:
    7c:9c:ac:f1:03:af:44:51:0f:9e:14:21:48:df:37:
    ae:6c:f5:94:ef
ASN1 OID: prime256v1
NIST CURVE: P-256
"086092f02852ff6845d1d16b27849c456718ac163dc338d26de6bc2206366f72"

on jruby:

JRuby-OpenSSL 0.14.5
OpenSSL::PKey::PKeyError: Could not parse PKey: unsupported
  <main> at Untitled 2.rb:9