go_libs

Go elements often included. This is the successor of the previous debugErrorCE package.

Crypt

RSA Key Creation

Keys can be created with the functions:

func CreateRSAKeyPair() (*rsa.PrivateKey, *rsa.PublicKey, error)

This function returns a 4096-bit RSA keypair or an error. It contains syntactic sugar as the private key always containts the public key. The second functions writes the keys directly to a file.

func CreateRSAKeyPair2File(outfileName string) error

Keys are automatically stored as a file. By default, the keys are 4096 bit, RSA keys. If the specified filename if foo, then the private key is stored in a file foo and the public key is stored in a file foo.pub. For compatibility reasons, the calls do not try to change the permissions of a file, in particular not of the private key file.

The function returns an error, if either foo or foo.pub already exists or cannot be created or written to. Both keys are stored in PEM format.

The key creation is compatible with openssl. My usual shell functions from the public github.com project (advertisement) PublicConfigurations allows us to verify if the private and the public key belong together and hereby are also recognised by openssl.

$ tlsRsaPrvFingerprint key1
5d30617645c9cf77d285e4ffd511c407f3aefaa7b2c45ecce6ceba73ccddd27c

$ tlsRsaPubFingerprint key1.pub 
5d30617645c9cf77d285e4ffd511c407f3aefaa7b2c45ecce6ceba73ccddd27c