1 files changed, 28 insertions, 0 deletions

diff --git a/crypto/x509/csr.go b/crypto/x509/csr.go
new file mode 100644
index 0000000..76ea809
--- /dev/null
+++ b/crypto/x509/csr.go
@@ -0,0 +1,28 @@
+package x509
+
+import (
+        "crypto/rand"
+        "crypto/rsa"
+        "crypto/x509"
+        "crypto/x509/pkix"
+)
+
+const defaultRSAKeyStrength = 4096
+
+func GenerateRSAKeyCSR(domains ...string) ([]byte, *rsa.PrivateKey, error) {
+        ckey, err := rsa.GenerateKey(rand.Reader, defaultRSAKeyStrength)
+        if err != nil {
+                return nil, nil, err
+        }
+
+        csr, err := x509.CreateCertificateRequest(rand.Reader, &x509.CertificateRequest{
+                Subject:         pkix.Name{CommonName: domains[0]},
+                DNSNames:        domains,
+                ExtraExtensions: []pkix.Extension{},
+        }, ckey)
+        if err != nil {
+                return nil, nil, err
+        }
+
+        return csr, ckey, nil
+}