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diff --git a/testkit/library/generate_csr_from_existing_key.sh b/testkit/library/generate_csr_from_existing_key.sh
new file mode 100644
index 00000000..bcd8ac8d
--- /dev/null
+++ b/testkit/library/generate_csr_from_existing_key.sh
@@ -0,0 +1,36 @@
+#!/bin/bash
+
+privkey="$1"; shift
+subject="$1"; shift
+csrfile="$1"; shift
+
+function print_instructions()
+{
+  echo -e "\n\
+This script creates a new CSR (certificate signing request) file for you from\n\
+an existing private key.  Getting a new certificate using this CSR ensures\n\
+that previously signed resources can still be considered properly signed, even\n\
+after the original certificate has expired, by using the new certificate for\n\
+validation.  After the new CSR file is generated, it must be sent to the\n\
+certificate authority and they can generate a new certificate for you.\n\
+\n\
+The script takes three parameters.  The first is the file in which the\n\
+private key is stored in PEM format.  The second parameter is the subject\n\
+to use in the certificate (who the certificate is issued to).  The third\n\
+parameter is the output file for the generated CSR (certificate signing\n\
+request).\n\
+\n\
+For example:\n\
+  $(basename $0) my-private.key \"Julius Orange\" orange-new-cert-request.csr\n\
+"
+}
+
+if [ -z "$privkey" -o -z "$subject" -o -z "$csrfile" -o ! -f "$privkey" ]; then
+  print_instructions
+  echo -e "\nThere was a missing parameter or the private key file did not exist."
+  exit 1
+fi
+
+openssl req -new -key "$privkey" -nodes -subj "$subject" -out "$csrfile"
+
+