crypto._PassphraseHelper: pass non-callable passphrase using callback (#947)
* crypto._PassphraseHelper: pass non-callable passphrase using callback
Fixes #945
Before this commit, we would pass a bytes passphrase as a null terminated string.
This causes issue when a randomly generated key's first byte is null because
OpenSSL rightly determines the key length is 0.
This commit modifies the passphrase helper to pass the passphrase via the
callback
* Update changelog to document bug fix
3 files changed