What is the process for integrating a third party API certificate into my Heroku application?

When my backend service calls a third-party API (Kamer van koophandel) to retrieve data, it requires a certificate to be set. It functions correctly locally, but upon pushing to Heroku, the following error occurs:

Warning: Ignoring extra certs from `Private_G1_chain.pem`, load failed: error:02001002:system library:fopen:No such file or directory
   Warning: Ignoring extra certs from `Private_G1_chain.pem`, load failed: error:02001002:system library:fopen:No such file or directory
   Warning: Ignoring extra certs from `Private_G1_chain.pem`, load failed: error:02001002:system library:fopen:No such file or directory
   Warning: Ignoring extra certs from `Private_G1_chain.pem`, load failed: error:02001002:system library:fopen:No such file or directory
   gyp: Call to 'node -p "require('node-addon-api').include"' returned exit status 0 while in binding.gyp. while trying to load binding.gyp
   gyp ERR! configure error 
   gyp ERR! stack Error: `gyp` failed with exit code: 1
   gyp ERR! stack     at ChildProcess.onCpExit (/tmp/build_e15be358/.heroku/node/lib/node_modules/npm/node_modules/node-gyp/lib/configure.js:351:16)
   gyp ERR! stack     at ChildProcess.emit (events.js:376:20)
   gyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:277:12)
   gyp ERR! System Linux 4.4.0-1088-aws
   gyp ERR! command "/tmp/build_e15be358/.heroku/node/bin/node" "/tmp/build_e15be358/.heroku/node/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "configure" "--fallback-to-build" "--module=/tmp/build_e15be358/node_modules/bcrypt/lib/binding/napi-v3/bcrypt_lib.node" "--module_name=bcrypt_lib" "--module_path=/tmp/build_e15be358/node_modules/bcrypt/lib/binding/napi-v3" "--napi_version=8" "--node_abi_napi=napi" "--napi_build_version=3" "--node_napi_label=napi-v3"
   gyp ERR! cwd /tmp/build_e15be358/node_modules/bcrypt
   gyp ERR! node -v v14.17.0
   gyp ERR! node-gyp -v v5.1.0
   gyp ERR! not ok 
   node-pre-gyp ERR! build error 
   node-pre-gyp ERR! stack Error: Failed to execute '/tmp/build_e15be358/.heroku/node/bin/node /tmp/build_e15be358/.heroku/node/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js configure --fallback-to-build --module=/tmp/build_e15be358/node_modules/bcrypt/lib/binding/napi-v3/bcrypt_lib.node --module_name=bcrypt_lib --

I have set the correct config var in Heroku: NODE_EXTRA_CA_CERTS = Private_G1_chain.pem

Interestingly, if I push my application to Heroku first and then set NODE_EXTRA_CA_CERTS, it works. However, if NODE_EXTRA_CA_CERTS is set before the push, I encounter the above error.

Just for reference, my application is built with node/express and uses typescript.

Thank you for your help!

typescriptexpressherokuservercertificate

Answer №1

The error message Ignoring extra certs occurs when Node receives multiple certificates from your .pem file. To fix this issue, remove any white spaces and line breaks from your .pem file.

Follow these steps to resolve the problem:

awk 'NF {sub(/\r/, ""); printf "%s\n",$0;}' your-cert.pem

Execute this command in the directory where your certificate file is located. It will add \n where needed.

The output will look like this:

-----BEGIN RSA PRIVATE KEY-----\njlQvt9WdR9Vpg3WQT5+C3HU17bUOwvhp/r0+viMcBUCRW85UqI2BJJKTi1IwQQ4c\ntyTrhYJYOP+A6JXt5BzDzZy/B7tjEMDBosPiwH2m4MaP+6wTbi1qR1pFDL3fXYDr\n

Save this string in the .env file and use it as a parameter instead of the file Private_G1_chain.pem.

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