Module pem 

PEM armor: base64 encoding with -----BEGIN/END ...----- headers.

Functions

base64_decode

Decode a base64 string. Returns None on invalid input.

base64_encode

Encode data as base64.

pem_decode

Decode a PEM block with the expected label. Returns the DER bytes. Returns None if the label doesn’t match or base64 is invalid.

pem_encode

Encode DER bytes as PEM with the given label (e.g. “RSA PUBLIC KEY”).