16 struct x509_certificate {  struct
17 	struct x509_certificate *next;  argument
18 	struct x509_certificate *signer;	/* Certificate that signed this one */  argument
19 	struct public_key *pub;			/* Public key details */
20 	struct public_key_signature *sig;	/* Signature parameters */
21 	char		*issuer;		/* Name of certificate issuer */
22 	char		*subject;		/* Name of certificate subject */
23 	struct asymmetric_key_id *id;		/* Issuer + Serial number */
24 	struct asymmetric_key_id *skid;		/* Subject + subjectKeyId (optional) */
25 	time64_t	valid_from;
26 	time64_t	valid_to;
27 	const void	*tbs;			/* Signed data */
51 extern void x509_free_certificate(struct x509_certificate *cert);  argument