hx509_cert - Online Linux Manual PageSection : 3
Updated : Tue Nov 15 2022
Source : Version 7.8.0
Note : Heimdal x509 library

NAMEhx509_cert − hx509 certificate functions

SYNOPSIS

Functionshx509_cert hx509_cert_init (hx509_context context, const Certificate *c, heim_error_t *error)
hx509_cert hx509_cert_init_data (hx509_context context, const void *ptr, size_t len, heim_error_t *error)
void hx509_cert_free (hx509_cert cert)
hx509_cert hx509_cert_ref (hx509_cert cert)
void hx509_verify_ctx_f_allow_default_trustanchors (hx509_verify_ctx ctx, int boolean)
int hx509_cert_find_subjectAltName_otherName (hx509_context context, hx509_cert cert, const heim_oid *oid, hx509_octet_string_list *list)
int hx509_cert_cmp (hx509_cert p, hx509_cert q)
int hx509_cert_get_issuer (hx509_cert p, hx509_name *name)
int hx509_cert_get_subject (hx509_cert p, hx509_name *name)
int hx509_cert_get_base_subject (hx509_context context, hx509_cert c, hx509_name *name)
int hx509_cert_get_serialnumber (hx509_cert p, heim_integer *i)
time_t hx509_cert_get_notBefore (hx509_cert p)
time_t hx509_cert_get_notAfter (hx509_cert p)
int hx509_cert_get_SPKI (hx509_context context, hx509_cert p, SubjectPublicKeyInfo *spki)
int hx509_cert_get_SPKI_AlgorithmIdentifier (hx509_context context, hx509_cert p, AlgorithmIdentifier *alg)
int hx509_cert_get_issuer_unique_id (hx509_context context, hx509_cert p, heim_bit_string *issuer)
int hx509_cert_get_subject_unique_id (hx509_context context, hx509_cert p, heim_bit_string *subject)
int hx509_verify_hostname (hx509_context context, const hx509_cert cert, int flags, hx509_hostname_type type, const char *hostname, const struct sockaddr *sa, int sa_size)
hx509_cert_attribute hx509_cert_get_attribute (hx509_cert cert, const heim_oid *oid)
int hx509_cert_set_friendly_name (hx509_cert cert, const char *name)
const char * hx509_cert_get_friendly_name (hx509_cert cert)
int hx509_query_alloc (hx509_context context, hx509_query **q)
void hx509_query_match_option (hx509_query *q, hx509_query_option option)
int hx509_query_match_issuer_serial (hx509_query *q, const Name *issuer, const heim_integer *serialNumber)
int hx509_query_match_friendly_name (hx509_query *q, const char *name)
int hx509_query_match_eku (hx509_query *q, const heim_oid *eku)
int hx509_query_match_cmp_func (hx509_query *q, int(*func)(hx509_context, hx509_cert, void *), void *ctx)
void hx509_query_free (hx509_context context, hx509_query *q)
void hx509_query_statistic_file (hx509_context context, const char *fn)
void hx509_query_unparse_stats (hx509_context context, int printtype, FILE *out)
int hx509_cert_check_eku (hx509_context context, hx509_cert cert, const heim_oid *eku, int allow_any_eku)
int hx509_cert_binary (hx509_context context, hx509_cert c, heim_octet_string *os)
int hx509_print_cert (hx509_context context, hx509_cert cert, FILE *out)

Detailed DescriptionSee the The basic certificate for description and examples​.

Function Documentation

int hx509_cert_binary (hx509_context context, hx509_cert c, heim_octet_string * os)Encodes the hx509 certificate as a DER encode binary​. Parameters context A hx509 context​.
c the certificate to encode​.
os the encode certificate, set to NULL, 0 on case of error​. Free the os->data with hx509_xfree()​.
Returns An hx509 error code, see hx509_get_error_string()​.

int hx509_cert_check_eku (hx509_context context, hx509_cert cert, const heim_oid * eku, int allow_any_eku)Check the extended key usage on the hx509 certificate​. Parameters context A hx509 context​.
cert A hx509 context​.
eku the EKU to check for
allow_any_eku if the any EKU is set, allow that to be a substitute​.
Returns An hx509 error code, see hx509_get_error_string()​.

int hx509_cert_cmp (hx509_cert p, hx509_cert q)Compare to hx509 certificate object, useful for sorting​. Parameters p a hx509 certificate object​.
q a hx509 certificate object​.
Returns 0 the objects are the same, returns > 0 is p is 'larger' then q, < 0 if p is 'smaller' then q​.

int hx509_cert_find_subjectAltName_otherName (hx509_context context, hx509_cert cert, const heim_oid * oid, hx509_octet_string_list * list)Return a list of subjectAltNames specified by oid in the certificate​. On error the The returned list of octet string should be freed with hx509_free_octet_string_list()​. Parameters context A hx509 context​.
cert a hx509 certificate object​.
oid an oid to for SubjectAltName​.
list list of matching SubjectAltName​.
Returns An hx509 error code, see hx509_get_error_string()​.

void hx509_cert_free (hx509_cert cert)Free reference to the hx509 certificate object, if the refcounter reaches 0, the object if freed​. Its allowed to pass in NULL​. Parameters cert the cert to free​.

hx509_cert_attribute hx509_cert_get_attribute (hx509_cert cert, const heim_oid * oid)Get an external attribute for the certificate, examples are friendly name and id​. Parameters cert hx509 certificate object to search
oid an oid to search for​.
Returns an hx509_cert_attribute, only valid as long as the certificate is referenced​.

int hx509_cert_get_base_subject (hx509_context context, hx509_cert c, hx509_name * name)Return the name of the base subject of the hx509 certificate​. If the certiicate is a verified proxy certificate, the this function return the base certificate (root of the proxy chain)​. If the proxy certificate is not verified with the base certificate HX509_PROXY_CERTIFICATE_NOT_CANONICALIZED is returned​. Parameters context a hx509 context​.
c a hx509 certificate object​.
name a pointer to a hx509 name, should be freed by hx509_name_free()​. See also hx509_cert_get_subject()​.
Returns An hx509 error code, see hx509_get_error_string()​.

const char* hx509_cert_get_friendly_name (hx509_cert cert)Get friendly name of the certificate​. Parameters cert cert to get the friendly name from​. Returns an friendly name or NULL if there is​. The friendly name is only valid as long as the certificate is referenced​.

int hx509_cert_get_issuer (hx509_cert p, hx509_name * name)Return the name of the issuer of the hx509 certificate​. Parameters p a hx509 certificate object​.
name a pointer to a hx509 name, should be freed by hx509_name_free()​.
Returns An hx509 error code, see hx509_get_error_string()​.

int hx509_cert_get_issuer_unique_id (hx509_context context, hx509_cert p, heim_bit_string * issuer)Get a copy of the Issuer Unique ID Parameters context a hx509_context
p a hx509 certificate
issuer the issuer id returned, free with der_free_bit_string()
Returns An hx509 error code, see hx509_get_error_string()​. The error code HX509_EXTENSION_NOT_FOUND is returned if the certificate doesn't have a issuerUniqueID

time_t hx509_cert_get_notAfter (hx509_cert p)Get notAfter time of the certificate​. Parameters p a hx509 certificate object​. Returns return not after time​.

time_t hx509_cert_get_notBefore (hx509_cert p)Get notBefore time of the certificate​. Parameters p a hx509 certificate object​. Returns return not before time

int hx509_cert_get_serialnumber (hx509_cert p, heim_integer * i)Get serial number of the certificate​. Parameters p a hx509 certificate object​.
i serial number, should be freed ith der_free_heim_integer()​.
Returns An hx509 error code, see hx509_get_error_string()​.

int hx509_cert_get_SPKI (hx509_context context, hx509_cert p, SubjectPublicKeyInfo * spki)Get the SubjectPublicKeyInfo structure from the hx509 certificate​. Parameters context a hx509 context​.
p a hx509 certificate object​.
spki SubjectPublicKeyInfo, should be freed with free_SubjectPublicKeyInfo()​.
Returns An hx509 error code, see hx509_get_error_string()​.

int hx509_cert_get_SPKI_AlgorithmIdentifier (hx509_context context, hx509_cert p, AlgorithmIdentifier * alg)Get the AlgorithmIdentifier from the hx509 certificate​. Parameters context a hx509 context​.
p a hx509 certificate object​.
alg AlgorithmIdentifier, should be freed with free_AlgorithmIdentifier()​. The algorithmidentifier is typicly rsaEncryption, or id-ecPublicKey, or some other public key mechanism​.
Returns An hx509 error code, see hx509_get_error_string()​.

int hx509_cert_get_subject (hx509_cert p, hx509_name * name)Return the name of the subject of the hx509 certificate​. Parameters p a hx509 certificate object​.
name a pointer to a hx509 name, should be freed by hx509_name_free()​. See also hx509_cert_get_base_subject()​.
Returns An hx509 error code, see hx509_get_error_string()​.

int hx509_cert_get_subject_unique_id (hx509_context context, hx509_cert p, heim_bit_string * subject)Get a copy of the Subect Unique ID Parameters context a hx509_context
p a hx509 certificate
subject the subject id returned, free with der_free_bit_string()
Returns An hx509 error code, see hx509_get_error_string()​. The error code HX509_EXTENSION_NOT_FOUND is returned if the certificate doesn't have a subjectUniqueID

hx509_cert hx509_cert_init (hx509_context context, const Certificate * c, heim_error_t * error)Allocate and init an hx509 certificate object from the decoded certificate `c´​. Parameters context A hx509 context​.
c
error
Returns Returns an hx509 certificate

hx509_cert hx509_cert_init_data (hx509_context context, const void * ptr, size_t len, heim_error_t * error)Just like hx509_cert_init(), but instead of a decode certificate takes an pointer and length to a memory region that contains a DER/BER encoded certificate​. If the memory region doesn't contain just the certificate and nothing more the function will fail with HX509_EXTRA_DATA_AFTER_STRUCTURE​. Parameters context A hx509 context​.
ptr pointer to memory region containing encoded certificate​.
len length of memory region​.
error possibly returns an error
Returns An hx509 certificate

hx509_cert hx509_cert_ref (hx509_cert cert)Add a reference to a hx509 certificate object​. Parameters cert a pointer to an hx509 certificate object​. Returns the same object as is passed in​.

int hx509_cert_set_friendly_name (hx509_cert cert, const char * name)Set the friendly name on the certificate​. Parameters cert The certificate to set the friendly name on
name Friendly name​.
Returns An hx509 error code, see hx509_get_error_string()​.

int hx509_print_cert (hx509_context context, hx509_cert cert, FILE * out)Print a simple representation of a certificate Parameters context A hx509 context, can be NULL
cert certificate to print
out the stdio output stream, if NULL, stdout is used
Returns An hx509 error code

int hx509_query_alloc (hx509_context context, hx509_query ** q)Allocate an query controller​. Free using hx509_query_free()​. Parameters context A hx509 context​.
q return pointer to a hx509_query​.
Returns An hx509 error code, see hx509_get_error_string()​.

void hx509_query_free (hx509_context context, hx509_query * q)Free the query controller​. Parameters context A hx509 context​.
q a pointer to the query controller​.

int hx509_query_match_cmp_func (hx509_query * q, int(*)(hx509_context, hx509_cert, void *) func, void * ctx)Set the query controller to match using a specific match function​. Parameters q a hx509 query controller​.
func function to use for matching, if the argument is NULL, the match function is removed​.
ctx context passed to the function​.
Returns An hx509 error code, see hx509_get_error_string()​.

int hx509_query_match_eku (hx509_query * q, const heim_oid * eku)Set the query controller to require an one specific EKU (extended key usage)​. Any previous EKU matching is overwitten​. If NULL is passed in as the eku, the EKU requirement is reset​. Parameters q a hx509 query controller​.
eku an EKU to match on​.
Returns An hx509 error code, see hx509_get_error_string()​.

int hx509_query_match_friendly_name (hx509_query * q, const char * name)Set the query controller to match on a friendly name Parameters q a hx509 query controller​.
name a friendly name to match on
Returns An hx509 error code, see hx509_get_error_string()​.

int hx509_query_match_issuer_serial (hx509_query * q, const Name * issuer, const heim_integer * serialNumber)Set the issuer and serial number of match in the query controller​. The function make copies of the isser and serial number​. Parameters q a hx509 query controller
issuer issuer to search for
serialNumber the serialNumber of the issuer​.
Returns An hx509 error code, see hx509_get_error_string()​.

void hx509_query_match_option (hx509_query * q, hx509_query_option option)Set match options for the hx509 query controller​. Parameters q query controller​.
option options to control the query controller​.
Returns An hx509 error code, see hx509_get_error_string()​.

void hx509_query_statistic_file (hx509_context context, const char * fn)Set a statistic file for the query statistics​. Parameters context A hx509 context​.
fn statistics file name

void hx509_query_unparse_stats (hx509_context context, int printtype, FILE * out)Unparse the statistics file and print the result on a FILE descriptor​. Parameters context A hx509 context​.
printtype tyep to print
out the FILE to write the data on​.

void hx509_verify_ctx_f_allow_default_trustanchors (hx509_verify_ctx ctx, int boolean)Allow using the operating system builtin trust anchors if no other trust anchors are configured​. Parameters ctx a verification context
boolean if non zero, useing the operating systems builtin trust anchors​.
Returns An hx509 error code, see hx509_get_error_string()​.

int hx509_verify_hostname (hx509_context context, const hx509_cert cert, int flags, hx509_hostname_type type, const char * hostname, const struct sockaddr * sa, int sa_size)Verify that the certificate is allowed to be used for the hostname and address​. Parameters context A hx509 context​.
cert the certificate to match with
flags Flags to modify the behavior:
• HX509_VHN_F_ALLOW_NO_MATCH no match is ok
type type of hostname:
• HX509_HN_HOSTNAME for plain hostname​. • HX509_HN_DNSSRV for DNS SRV names​.
hostname the hostname to check
sa address of the host
sa_size length of address
Returns An hx509 error code, see hx509_get_error_string()​.

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