diff --git a/README.md b/README.md
index 627b599..a17b7ce 100644
--- a/README.md
+++ b/README.md
@@ -6,3 +6,18 @@ I've just completed these:
 * [eckles.js](https://git.coolaj86.com/coolaj86/eckles.js) - JWK-to-PEM and PEM-to-JWK for EC / ECDSA P-256 and P-384
 
 I've got working prototypes for the RSA variants as well and I'm in the middle of cleaning them up to publish.
+
+Testing
+-------
+
+```
+openssl genrsa -out privkey-rsa-2048.pkcs1.pem 2048
+openssl rsa -in privkey-rsa-2048.pkcs1.pem -pubout -out pub-rsa-2048.spki.pem
+openssl pkcs8 -topk8 -nocrypt -in privkey-rsa-2048.pkcs1.pem -out privkey-rsa-2048.pkcs8.pem
+openssl rsa -in pub-rsa-2048.spki.pem -pubin -RSAPublicKey_out -out pub-rsa-2048.pkcs1.pem
+ssh-keygen -f ./pub-rsa-2048.spki.pem -i -mPKCS8 > ./pub-rsa-2048.ssh.pub
+```
+
+** unified openssl commands **
+
+https://gist.github.com/briansmith/2ee42439923d8e65a266994d0f70180b
diff --git a/fixtures/privkey-rsa-2048.pkcs1.pem b/fixtures/privkey-rsa-2048.pkcs1.pem
new file mode 100644
index 0000000..246bd35
--- /dev/null
+++ b/fixtures/privkey-rsa-2048.pkcs1.pem
@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----
diff --git a/fixtures/privkey-rsa-2048.pkcs8.pem b/fixtures/privkey-rsa-2048.pkcs8.pem
new file mode 100644
index 0000000..53dbf83
--- /dev/null
+++ b/fixtures/privkey-rsa-2048.pkcs8.pem
@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----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+-----END PRIVATE KEY-----
diff --git a/fixtures/pub-rsa-2048.pkcs1.pem b/fixtures/pub-rsa-2048.pkcs1.pem
new file mode 100644
index 0000000..e592fda
--- /dev/null
+++ b/fixtures/pub-rsa-2048.pkcs1.pem
@@ -0,0 +1,8 @@
+-----BEGIN RSA PUBLIC KEY-----
+MIIBCgKCAQEAm2ttVBxPlWw06ZmGBWVDlfjkPAJ4DgnY0TrDwtCohHzLxGhDNzUJ
+efLukC+xu0LBKylYojT5vTkxaOhxeSYo31syu4WhxbkTBLICOFcCGMob6pSQ38P8
+LdAIlb0pqDHxEJ9adWomjuFf0SUhN1cP7s9m8Yk9trkpEqjskocn2BOnTB57qAZM
+6+I70on0/iDZm7+jcqOPgADAmbWHhy67BXkk4yy/YzD4yOGZFXZcNp915/TW5bRd
+//AKPHUHxJasPiyEFqlNKBR2DSD+LbX5eTmzCh2ikrwTMja7mUdBJf2bK3By5AB0
+Qi49OykUCfNZeQlEz7UNNj9RGps/50+CNwIDAQAB
+-----END RSA PUBLIC KEY-----
diff --git a/fixtures/pub-rsa-2048.spki.pem b/fixtures/pub-rsa-2048.spki.pem
new file mode 100644
index 0000000..465d115
--- /dev/null
+++ b/fixtures/pub-rsa-2048.spki.pem
@@ -0,0 +1,9 @@
+-----BEGIN PUBLIC KEY-----
+MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAm2ttVBxPlWw06ZmGBWVD
+lfjkPAJ4DgnY0TrDwtCohHzLxGhDNzUJefLukC+xu0LBKylYojT5vTkxaOhxeSYo
+31syu4WhxbkTBLICOFcCGMob6pSQ38P8LdAIlb0pqDHxEJ9adWomjuFf0SUhN1cP
+7s9m8Yk9trkpEqjskocn2BOnTB57qAZM6+I70on0/iDZm7+jcqOPgADAmbWHhy67
+BXkk4yy/YzD4yOGZFXZcNp915/TW5bRd//AKPHUHxJasPiyEFqlNKBR2DSD+LbX5
+eTmzCh2ikrwTMja7mUdBJf2bK3By5AB0Qi49OykUCfNZeQlEz7UNNj9RGps/50+C
+NwIDAQAB
+-----END PUBLIC KEY-----
diff --git a/fixtures/pub-rsa-2048.ssh.pub b/fixtures/pub-rsa-2048.ssh.pub
new file mode 100644
index 0000000..b9b950f
--- /dev/null
+++ b/fixtures/pub-rsa-2048.ssh.pub
@@ -0,0 +1 @@
+ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCba21UHE+VbDTpmYYFZUOV+OQ8AngOCdjROsPC0KiEfMvEaEM3NQl58u6QL7G7QsErKViiNPm9OTFo6HF5JijfWzK7haHFuRMEsgI4VwIYyhvqlJDfw/wt0AiVvSmoMfEQn1p1aiaO4V/RJSE3Vw/uz2bxiT22uSkSqOyShyfYE6dMHnuoBkzr4jvSifT+INmbv6Nyo4+AAMCZtYeHLrsFeSTjLL9jMPjI4ZkVdlw2n3Xn9NbltF3/8Ao8dQfElqw+LIQWqU0oFHYNIP4ttfl5ObMKHaKSvBMyNruZR0El/ZsrcHLkAHRCLj07KRQJ81l5CUTPtQ02P1Eamz/nT4I3