a. Extract an existing certificate key from the store:
keytool -v -importkeystore -srckeystore keystore -srcalias one -destkeystore temppp -deststoretype PKCS12 -srcstorepass passwordd -deststorepass passwordd
b. Extract the private key from the exported certificate:
openssl pkcs12 -in temppp -out csr_private.key -nocerts -nodes -password pass:passwordd
c. Generate csr using extracted key:
openssl req -nodes -sha256 -new -key csr_private.key -out request.csr -subj '/C=IL/ST=Unknown/L=Unknown/O=Bla/OU=Bla/CN=BLAAAA'
d. Generate a self-signed certificate and key:
openssl req -x509 -newkey rsa:2048 -keyout ca_key.pem -nodes -sha512 -days 4096 -subj '/C=IL/ST=Unknown/L=Unknown/O=Bla Bla/OU=BLA/CN=FOOO' -out ca.pem
e. Sign the csr with the self-signed certificate:
openssl x509 -in request.csr -out signed_cert.pem -req -signkey ca_key.pem -days 1001
f. Export the signed certificate and csr key to one p12 file:
openssl pkcs12 -export -in signed_cert.pem -inkey csr_private.key -out file.p12 -name "one"
No certificate matches private key
The fix is to add "-nodes" to the last command (f).
In the second command that key was exported with "-nodes" (no DES encryption), and it should be the same in the last command too.