***** Create a self signed cert ************

1) openssl genrsa 1024 > client-key.pem

2) openssl req -new -x509 -nodes -sha1 -days 1000 -key client-key.pem > client-cert.pem

3) note md5 would be -md5

-- adding metadata to beginning

3) openssl x509 -in client-cert.pem -text > tmp.pem

4) mv tmp.pem client-cert.pem


***** Create a CA, signing authority **********

same as self signed, use ca prefix instead of client


***** Create a cert signed by CA **************

1) openssl req -newkey rsa:1024 -sha1 -days 1000 -nodes -keyout server-key.pem > server-req.pem

* note if using existing key do: -new -key keyName

2) copy ca-key.pem ca-cert.srl   (why ????)

3) openssl x509 -req -in server-req.pem -days 1000 -sha1 -CA ca-cert.pem -CAkey ca-key.pem -set_serial 01 > server-cert.pem


***** Adding Subject Key ID and Authentication Key ID extensions to a cert *****

Create a config file for OpenSSL with the example contents:

    [skidakid]
    subjectKeyIdentifier=hash
    authorityKeyIdentifier=keyid

Add to the openssl command for creating a cert signed by a CA step 3 the
following options:

    -extfile <file.cnf> -extensions skidakid

anywhere before the redirect. This will add the cert's public key hash as the
Subject Key Identifier, and the signer's SKID as the Authentication Key ID.


***** To create a dsa cert ********************

1) openssl dsaparam 512 > dsa512.param       # creates group params

2) openssl gendsa dsa512.param > dsa512.pem  # creates private key

3) openssl req -new -x509 -nodes -days 1000 -key dsa512.pem > dsa-cert.pem 




***** To convert from PEM to DER **************

a) openssl x509 -in cert.pem -inform PEM -out cert.der -outform DER

to convert rsa private PEM to DER :

b) openssl rsa -in key.pem -outform DER -out key.der


**** To encrypt rsa key already in pem **********

a) openssl rsa <server-key.pem.bak -des >server-keyEnc.pem

note location of des, pass = yassl123


*** To make a public key from a private key ******


openssl rsa -in 1024rsa.priv -pubout -out 1024rsa.pub


**** To convert to pkcs8 *******

openssl pkcs8 -nocrypt -topk8 -in server-key.pem -out server-keyPkcs8.pem


**** To convert to pkcs8 encrypted *******

openssl pkcs8 -topk8 -in server-key.pem -out server-keyPkcs8Enc.pem

passwd: yassl123

to use PKCS#5 v2 instead of v1.5 which is default add

-v2 des3       # file Pkcs8Enc2

to use PKCS#12 instead use -v1 which a 12 algo like

-v1 PBE-SHA1-3DES   # file Pkcs8Enc12 , see man pkcs8 for more info
-v1 PBE-SHA1-RC4-128   # no longer file Pkcs8Enc12, arc4 now off by default


**** To convert from pkcs8 to traditional ****

openssl pkcs8 -nocrypt -in server-keyPkcs8.pem -out server-key.pem


*** DH parameters ***

openssl dhparam 2048 > dh2048.param

to add metadata

openssl dhparam -in dh2048.param -text > dh2048.pem

**** ECC ******

1) make a key

    to see types available do
        openssl ecparam -list_curves

    make a new key
        openssl ecparam -genkey -text -name secp256r1 -out ecc-key.pem

    convert to compressed
        openssl ec -in ecc-key.pem -conv_form compressed -out ecc-key-comp.pem 

*** CRL ***

1) create a crl

a) openssl ca -gencrl -crldays 120 -out crl.pem -keyfile ./ca-key.pem -cert ./ca-cert.pem

Error No ./CA root/index.txt so:

b) touch ./CA root/index.txt

a) again

Error No ./CA root/crlnumber so:

c) touch ./CA root/crlnumber

a) again

Error unable to load CRL number

d) add '01' to crlnumber file

a) again

2)  view crl file

openssl crl -in crl.pem -text

3) revoke

openssl ca -revoke server-cert.pem -keyfile ./ca-key.pem -cert ./ca-cert.pem

Then regenerate crl with a)

4) verify

openssl verify -CAfile ./ca-cert.pem  ./server-cert.pem

OK

Make file with both ca and crl

cat ca-cert.pem crl.pem > ca-crl.pem

openssl verify -CAfile ./ca-crl.pem -crl_check ./ca-cert.pem

revoked