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Manage custom certificates — SSL for SaaS

For use cases and limitations, refer to custom certificates .

Upload certificates

With the dashboard

To upload a custom certificate in the dashboard, follow the steps for issuing new certificates , but change the Certificate type to Custom certificate.

For more details on bundle method, refer to Bundle Methodologies

With the API

The call below will upload a certificate for use with app.example.com.

Note that if you are using an ECC key generated by OpenSSL, you will need to first remove the -----BEGIN EC PARAMETERS-----...-----END EC PARAMETERS----- section of the file.

Step 1 — Update the file and build the payload

$ cat app_example_com.pem
-----BEGIN CERTIFICATE-----
MIIFJDCCBAygAwIBAgIQD0ifmj/Yi5NP/2gdUySbfzANBgkqhkiG9w0BAQsFADBN
MQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMScwJQYDVQQDEx5E
...
SzSHfXp5lnu/3V08I72q1QNzOCgY1XeL4GKVcj4or6cT6tX6oJH7ePPmfrBfqI/O
OeH8gMJ+FuwtXYEPa4hBf38M5eU5xWG7
-----END CERTIFICATE-----
$ MYCERT="$(cat app_example_com.pem|perl -pe 's/\r?\n/\\n/'|sed -e 's/..$//')"
$ MYKEY="$(cat app_example_com.key|perl -pe 's/\r?\n/\\n/'|sed -e's/..$//')"

With the certificate and key saved to environment variables (using escaped newlines), build the payload:

$ echo $MYCERT
-----BEGIN CERTIFICATE-----\nMIIFJDCCBAygAwIBAgIQD0ifmj/Yi5NP/2gdUySbfzANBgkqhkiG9w0BAQsFADBN\nMQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMScwJQYDVQQDEx5E...SzSHfXp5lnu/3V08I72q1QNzOCgY1XeL4GKVcj4or6cT6tX6oJH7ePPmfrBfqI/O\nOeH8gMJ+FuwtXYEPa4hBf38M5eU5xWG7\n-----END CERTIFICATE-----\n
$ request_body=$(< <(cat <<EOF
{
"hostname": "app.example.com",
"ssl": {
"custom_certificate": "$MYCERT",
"custom_key": "$MYKEY"
}
}
EOF
))

Step 2 — Upload your certificate and key

Use a POST request to upload your certificate and key.

The serial number returned is unique to the issuer, but not globally unique. Additionally, it is returned as a string, not an integer.


Move to a Cloudflare certificate

If you want to switch from maintaining a custom certificate to using one issued by Cloudflare, you can migrate that certificate with zero downtime.

Send a PATCH request to your custom hostname with a value for the DCV method. As soon as the certificate is validated and the hostname is verified , Cloudflare will remove the old custom certificate and begin serving the new one.