# Openssl

## RSA

### Generate RSA keys

On Openssl:

* openssl genrsa -out rsa.pem 1024
* openssl rsa -in rsa.pem -pubout -outform pem -out rsa-pub.out

On Coherence:

```javascript
{ "version": 1 , "algorithm":"RSA", "operation":"gen" , "length": 1024 }
```

### From Openssl to Coherence priv key

* openssl pkcs8 -nocrypt -in rsa.pem -inform PEM -topk8 -outform DER -out rsa.der
* cat rsa.der | xxd -ps | paste -s -d '' > rsa.der.hex

### From Openssl to Coherence pub key

* openssl rsa -in rsa.pem -pubout -outform DER -out rsa-pub.der
* cat rsa-pub.der | xxd -ps | paste -s -d '' > rsa-pub.der.hex

### From Coherence to Openssl priv key

* cat crsa.der.hex | xxd -r -p - > crsa.der
* openssl rsa -inform der -outform pem -in crsa.der -out crsa.pem

### From Coherence to Openssl pub key

* cat crsa-pub.der.hex | xxd -r -p - > crsa-pub.der
* openssl rsa -inform der -outform pem -pubin -in crsa-pub.der -out crsa-pub.pem

## DSA

### Generate DSA keys

On Openssl:

* openssl dsaparam -out dsa-param.pem 1024
* openssl gendsa -out dsa.pem dsa-param.pem
* openssl dsa -in dsa.pem -pubout -outform PEM -out dsa-pub.pem

On Coherence:

```javascript
{"operation": "gen", "version": 1, "length": 1024, "algorithm": "DSA"}
```

### From Openssl to Coherence priv key

* openssl pkcs8 -nocrypt -in dsa.pem -inform PEM -topk8 -outform DER -out dsa.der
* cat dsa.der | xxd -ps | paste -s -d '' > dsa.der.hex

### From Openssl to Coherence pub key

* openssl dsa -in dsa.pem -pubout -outform DER -out dsa-pub.der
* cat dsa-pub.der | xxd -ps | paste -s -d '' > dsa-pub.der.hex

### From Coherence to Openssl priv key

* cat cdsa.der.hex | xxd -r -p - > cdsa.der
* openssl dsa -inform der -outform pem -in cdsa.der -out cdsa.pem

### From Coherence to Openssl pub key

* cat cdsa-pub.der.hex | xxd -r -p - > cdsa-pub.der
* openssl dsa -inform der -outform pem -pubin -in cdsa-pub.der -out cdsa-pub.pem


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