Delphi Lockbox 3 DOES NOT load public key generated by OpenSSL - delphi

Question

Trying to load RSA public key in Delphi by the use of Lockbox 3 I encounter this error: "(Error) Public key file corrupt, empty or the wrong type."
I have generated a pair of public and private key by OpenSSL using the following commands:
openssl genrsa -out private.pem 2048 //generate private key
openssl rsa -pubout -in private.pem -out public.pem //generate public key
Then in Delphi I used the following code to load libeay32.dll:
sig: TOpenSSL_Signatory;
...
Sig.Clear;
Sig.isLoaded := True;
if Sig.isLoaded then ShowMessage('The OpenSSL library libeay32.dll was loaded successfully.');
which always loads successfully.
Then I use the below code to load the public key (i.e. public.pem):
f:=TFileStream.Create('c:\keys\public.pem', fmOpenRead);
sig.LoadKeysFromStream(f, [partPublic]);
f.Free;
The above code results in the following error:
"(Error) Public key file corrupt, empty or the wrong type."
How can I solve this problem and load the public key generated by OpenSSL successfully to Delphi?
The public.pem is shown below:
-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAz98tqhhArIOoTtO3HFDW
TcQz4EcSBIc3YejV9GPQq+gMdqO5VsmQhOfHyWAMwOVJ49w/fGib+zyIPmocwCqE
jnQ5UjpNhkO5JIDmlf5NZGI2JcuORg+4Anqgo0D4YGCY04w7Sk8dArLHK+PThPwC
uM2XqyRCpcyTsWRKcH5/G6k6OBBhj5kIeNOy+ZCLeADhNUNiEBXdHQWoMbC+x8Fk
E73KzoOg61BQ7HBMJmfK2p8Shi/wEqD1DPJK3IKkTS+KAB8LvLXdUTDHg1O6FbDn
FfSQWYXzV5MWZR7M3POyX6rjoGRFK+v3mG08S5qEPj/l/PBgNL6wI/aBNkFsYxgf
7QIDAQAB
-----END PUBLIC KEY-----

Answer 1

Method TOpenSSL_Signatory.LoadKeysFromStream() is expecting the key to end in ...
-----END RSA PUBLIC KEY-----
This method expects the key to be in PEM (SSLeay) format. SSLeay PEM has base64 content tagged with -----BEGIN/END RSA PUBLIC/PRIVATE KEY-----.
To generate a key in the traditional PEM format see ...
https://superuser.com/questions/606215/openssl-pkcs8-default-format-gives-rsa-private-key
http://rietta.com/blog/2012/01/27/openssl-generating-rsa-key-from-command/
You can't change the format simply by renaming the header/footer. You actually have to generate SSLeay PEM by passing the correct options to OpenSSL.