I believe this is the detail that is missing.  I was following 
the 
https://apereo.github.io/cas/5.3.x/installation/Configuration-Properties-Common.html#signing--encryption
 
documentation.  Didn't see the line at webflow about "The encryption key 
must be randomly-generated string of size f16. The signing key is a JWK 
<https://apereo.github.io/cas/5.3.x/installation/Configuration-Properties-Common.html#signing--encryption>
 of 
size 512."

openssl rand -base64 16 > webflow-enc.txt

I had the -s, but lost it in the translation to google groups.

On Thursday, September 13, 2018 at 4:12:26 PM UTC-4, David Curry wrote:
>
> The encryption key for Spring Webflow (cas.webflow.crypto.encryption.key) 
> is not a JSON Web Key. It's a randomly-generated string of 16 octets, 
> Base64-encoded. You can generate it with OpenSSL:
>
> openssl rand -base64 16 > webflow-enc.txt
>
>
> Also, I believe you need a '-s' in front of the size argument for the 
> other three:
>
> java -jar jwk-gen.jar -t oct *-s* 256 -o tgc-enc.jwks
> java -jar jwk-gen.jar -t oct *-s* 512 -o tgc-sig.jwks
> java -jar jwk-gen.jar -t oct *-s* 512 -o webflow-sig.jwks
>
>
> --Dave
>
> P.S. - I'm guessing on the '-s' issue; I used the web-based version of 
> the key generator rather than the jar file.
>
> --
>
> DAVID A. CURRY, CISSP
> *DIRECTOR OF INFORMATION SECURITY*
> INFORMATION TECHNOLOGY
>
> 71 FIFTH AVE., 9TH FL., NEW YORK, NY 10003
> +1 212 229-5300 x4728 • david.cu...@newschool.edu <javascript:>
>
> [image: The New School]
>
>
> On Thu, Sep 13, 2018 at 4:01 PM Curtis Ruck <curti...@gmail.com 
> <javascript:>> wrote:
>
>> The problem is due to the chicken and egg issue.  I need to prepopulate 
>> the cas.properties, so the service can start up and work (without human 
>> intervention).  I'm trying my best to avoid having to start a service, 
>> parse the logs, and modify config, then restart the service.  The 
>> documentation seems very light on these keys.
>>
>> On Thursday, September 13, 2018 at 10:03:02 AM UTC-4, William E. wrote:
>>>
>>> +1
>>>
>>> I ended up grabbing values from the cas startup logs and setting in my 
>>> cas.properties.  Seems to work.
>>>
>>>
>>> On Wednesday, September 12, 2018 at 3:34:32 PM UTC-5, Curtis Ruck wrote:
>>>>
>>>> So i'm trying to automate the generation and persistence of the 
>>>> cas.tgc.crypto and cas.webflow.crypto encryption and signing keys.
>>>>
>>>> I'm using the jwk-gen.jar, and when i store the key in cas.properties, 
>>>> i end up with "Invalid AES key length: 43 bytes" when trying to access the 
>>>> login page.
>>>>
>>>>
>>>> If I let CAS generate a key, its the same exact string length (43 
>>>> bytes). What is different between my key versus cas's generated keys? Then 
>>>> i'm extracting the k value from the json, and inserting it into my 
>>>> cas.properties.
>>>>
>>>> java -jar jwk-gen.jar -t oct 256 -o tgc-enc.jwks
>>>> java -jar jwk-gen.jar -t oct 512 -o tgc-sig.jwks
>>>> java -jar jwk-gen.jar -t oct 256 -o webflow-enc.jwks
>>>> java -jar jwk-gen.jar -t oct 512 -o webflow-sig.jwks
>>>>
>>> -- 
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>

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