SSLCertificateFile    /etc/apache2/ssl/public.crt
  SSLCertificateKeyFile /etc/apache2/ssl/private.key

Tue Feb 21 13:12:23.382556 2017] [ssl:error] [pid 8757] AH02579: Init: Private key not found
[Tue Feb 21 13:12:23.382844 2017] [ssl:error] [pid 8757] SSL Library Error: error:0D0680A8:asn1 encoding routines:ASN1_CHECK_TLEN:wrong tag
[Tue Feb 21 13:12:23.382867 2017] [ssl:error] [pid 8757] SSL Library Error: error:0D08303A:asn1 encoding routines:ASN1_TEMPLATE_NOEXP_D2I:nested asn1 error
[Tue Feb 21 13:12:23.382881 2017] [ssl:error] [pid 8757] SSL Library Error: error:0D0680A8:asn1 encoding routines:ASN1_CHECK_TLEN:wrong tag
[Tue Feb 21 13:12:23.382896 2017] [ssl:error] [pid 8757] SSL Library Error: error:0D07803A:asn1 encoding routines:ASN1_ITEM_EX_D2I:nested asn1 error (Type=RSA)
[Tue Feb 21 13:12:23.382911 2017] [ssl:error] [pid 8757] SSL Library Error: error:04093004:rsa routines:OLD_RSA_PRIV_DECODE:RSA lib
[Tue Feb 21 13:12:23.382981 2017] [ssl:error] [pid 8757] SSL Library Error: error:0D0680A8:asn1 encoding routines:ASN1_CHECK_TLEN:wrong tag
[Tue Feb 21 13:12:23.382998 2017] [ssl:error] [pid 8757] SSL Library Error: error:0D07803A:asn1 encoding routines:ASN1_ITEM_EX_D2I:nested asn1 error (Type=PKCS8_PRIV_KEY_INFO)
[Tue Feb 21 13:12:23.383007 2017] [ssl:emerg] [pid 8757] AH02311: Fatal error initialising mod_ssl, exiting. See /var/log/apache2/error.log for more information
[Tue Feb 21 13:12:23.383012 2017] [ssl:emerg] [pid 8757] AH02564: Failed to configure encrypted (?) private key 127.0.0.1:443:0, check /etc/apache2/ssl/private.key
AH00016: Configuration Failed