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