HTTR R, CURL, Could not load PEM Certificate? - r

Question

I'm trying to make an API request and am passing my SSL cert to the config() parameter of GET. I initially got this working for a few weeks but then had to reinstall R. I did a clean install, deleting all folders, installing R, RTools, RStudio. In this new instance of R the same script no longer works. I've uninstalled/reinstalled HTTR, curl, openssl and no luck still (I've also reinstalled R multiple times).
This is the error I get:
Error in curl::curl_fetch_memory(url, handle = handle) :
could not load PEM client certificate, OpenSSL error error:02001002:system library:fopen:No such file or directory, (no key found, wrong pass phrase, or wrong file format?)
This is the get request code:
conn <- GET(url = "testurl",
add_headers(header2),
config(sslcert = "my_cert.pem", sslkey = "my_key.pem"),
content_type_json(),
accept_json())
Where my_cert.pem and my_key.pem were parsed from openssl by:
cert <- openssl::read_p12(file = "Data/certificate.pfx", password = "somepassword")
my_cert.pem <- write_pem(cert$cert)
my_key.pem <- write_pem(cert$key)
Any help with this would be much appreciated.
Thank you

Answer 1

Following the answer provided by #MrFlick I was able to resolve the issue.
Writing the files to disk before the get() request like so:
write_pem(cert$cert, "my_cert.pem")
write_pem(cert$key, "my_key.pem")
Resulted in a successful response and I no longer received the error of:
Error in curl::curl_fetch_memory(url, handle = handle) : could not load PEM client certificate, OpenSSL error error:02001002:system library:fopen:No such file or directory, (no key found, wrong pass phrase, or wrong file format?)