## GcrCertificate GcrCertificate — Represents a certificate. |

## Synopsis

    #define             GCR_CERTIFICATE_GET_INTERFACE       (inst)
                        GcrCertificate;
                        GcrCertificateIface;
    const guchar*       gcr_certificate_get_der_data        (GcrCertificate *self,
                                                             gsize *n_data);
    gchar*              gcr_certificate_get_issuer_cn       (GcrCertificate *self);
    gchar*              gcr_certificate_get_issuer_dn       (GcrCertificate *self);
    gchar*              gcr_certificate_get_issuer_part     (GcrCertificate *self,
                                                             const gchar *part);
    gchar*              gcr_certificate_get_subject_cn      (GcrCertificate *self);
    gchar*              gcr_certificate_get_subject_dn      (GcrCertificate *self);
    gchar*              gcr_certificate_get_subject_part    (GcrCertificate *self,
                                                             const gchar *part);
    GDate*              gcr_certificate_get_issued_date     (GcrCertificate *self);
    GDate*              gcr_certificate_get_expiry_date     (GcrCertificate *self);
    guchar*             gcr_certificate_get_serial_number   (GcrCertificate *self,
                                                             gsize *n_length);
    gchar*              gcr_certificate_get_serial_number_hex
                                                            (GcrCertificate *self);
    guint               gcr_certificate_get_key_size        (GcrCertificate *self);
    guchar*             gcr_certificate_get_fingerprint     (GcrCertificate *self,
                                                             GChecksumType type,
                                                             gsize *n_length);
    gchar*              gcr_certificate_get_fingerprint_hex (GcrCertificate *self,
                                                             GChecksumType type);

## Object Hierarchy

      GInterface
       +----GcrCertificateIface

## Prerequisites

GcrCertificateIface requires GObject.

## Known Implementations

GcrCertificateIface is implemented by GcrSimpleCertificate.

## Description

This is an interface that represents an X509 certificate. Objects can implement this interface to make a certificate usable with the GCR library.

You can use GcrSimpleCertificate to simply load a certificate.

## Details

### GCR_CERTIFICATE_GET_INTERFACE()

    #define GCR_CERTIFICATE_GET_INTERFACE(inst)  (G_TYPE_INSTANCE_GET_INTERFACE ((inst), GCR_TYPE_CERTIFICATE, GcrCertificateIface))

`inst` : |

### GcrCertificate

    typedef struct _GcrCertificate GcrCertificate;

### GcrCertificateIface

    typedef struct _GcrCertificateIface GcrCertificateIface;

### gcr_certificate_get_der_data ()

    const guchar*       gcr_certificate_get_der_data        (GcrCertificate *self,
                                                             gsize *n_data);

Gets the raw DER data for an X509 certificate.

`self` : | a GcrCertificate
`n_data` : |
Returns : | raw DER data of the X509 certificate.

### gcr_certificate_get_issuer_cn ()

    gchar*              gcr_certificate_get_issuer_cn       (GcrCertificate *self);

Get the common name of the issuer of this certificate.

The string returned should be freed by the caller when no longer required.

`self` : | a GcrCertificate
Returns : | The allocated issuer CN, or NULL if no issuer CN present.

### gcr_certificate_get_issuer_dn ()

    gchar*              gcr_certificate_get_issuer_dn       (GcrCertificate *self);

Get the full issuer DN of the certificate as a (mostly) readable string.

The string returned should be freed by the caller when no longer required.

`self` : | a GcrCertificate
Returns : | The allocated issuer DN of the certificate.

### gcr_certificate_get_issuer_part ()

    gchar*              gcr_certificate_get_issuer_part     (GcrCertificate *self,
                                                             const gchar *part);

Get a part of the DN of the issuer of this certificate.

Examples of a `part` might be the 'OU' (organizational unit) or the 'CN' (common name). Only the value of that part of the DN is returned.

The string returned should be freed by the caller when no longer required.

`self` : | a GcrCertificate
`part` : | a DN type string or OID.
Returns : | The allocated part of the issuer DN, or NULL if no such part is present.

### gcr_certificate_get_subject_cn ()

    gchar*              gcr_certificate_get_subject_cn      (GcrCertificate *self);

Get the common name of the subject of this certificate.

The string returned should be freed by the caller when no longer required.

`self` : | a GcrCertificate
Returns : | The allocated subject CN, or NULL if no subject CN present.

### gcr_certificate_get_subject_dn ()

    gchar*              gcr_certificate_get_subject_dn      (GcrCertificate *self);

Get the full subject DN of the certificate as a (mostly) readable string.

The string returned should be freed by the caller when no longer required.

`self` : | a GcrCertificate
Returns : | The allocated subject DN of the certificate.

### gcr_certificate_get_subject_part ()

    gchar*              gcr_certificate_get_subject_part    (GcrCertificate *self,
                                                             const gchar *part);

Get a part of the DN of the subject of this certificate.

Examples of a `part` might be the 'OU' (organizational unit) or the 'CN' (common name). Only the value of that part of the DN is returned.

The string returned should be freed by the caller when no longer required.

`self` : | a GcrCertificate
`part` : | a DN type string or OID.
Returns : | The allocated part of the subject DN, or NULL if no such part is present.

### gcr_certificate_get_issued_date ()

    GDate*              gcr_certificate_get_issued_date     (GcrCertificate *self);

Get the issued date of this certificate.

The GDate returned should be freed by the caller using `g_date_free()` when no longer required.

`self` : | a GcrCertificate
Returns : | An allocated issued date of this certificate.

### gcr_certificate_get_expiry_date ()

    GDate*              gcr_certificate_get_expiry_date     (GcrCertificate *self);

Get the expiry date of this certificate.

The GDate returned should be freed by the caller using `g_date_free()` when no longer required.

`self` : | a GcrCertificate
Returns : | An allocated expiry date of this certificate.

### gcr_certificate_get_serial_number ()

    guchar*             gcr_certificate_get_serial_number   (GcrCertificate *self,
                                                             gsize *n_length);

Get the raw binary serial number of the certificate.

The caller should free the returned data using `g_free()` when it is no longer required.

`self` : | a GcrCertificate
`n_length` : | the length of the returned data.
Returns : | the raw binary serial number.

### gcr_certificate_get_serial_number_hex ()

    gchar*              gcr_certificate_get_serial_number_hex
                                                            (GcrCertificate *self);

Get the serial number of the certificate as a hex string.

The caller should free the returned data using `g_free()` when it is no longer required.

`self` : | a GcrCertificate
Returns : | an allocated string containing the serial number as hex.

### gcr_certificate_get_key_size ()

    guint               gcr_certificate_get_key_size        (GcrCertificate *self);

Get the key size in bits of the public key represented by this certificate.

`self` : | a GcrCertificate
Returns : | The key size of the certificate.

### gcr_certificate_get_fingerprint ()

    guchar*             gcr_certificate_get_fingerprint     (GcrCertificate *self,
                                                             GChecksumType type,
                                                             gsize *n_length);

Calculate the fingerprint for this certificate.

You can pass G_CHECKSUM_SHA1 or G_CHECKSUM_MD5 as the `type` parameter.

The caller should free the returned data using `g_free()` when it is no longer required.

`self` : | a GcrCertificate
`type` : | the type of algorithm for the fingerprint.
`n_length` : |
Returns : | the raw binary fingerprint.

### gcr_certificate_get_fingerprint_hex ()

    gchar*              gcr_certificate_get_fingerprint_hex (GcrCertificate *self,
                                                             GChecksumType type);

Calculate the fingerprint for this certificate, and return it as a hex string.

You can pass G_CHECKSUM_SHA1 or G_CHECKSUM_MD5 as the `type` parameter.

The caller should free the returned data using `g_free()` when it is no longer required.

`self` : | a GcrCertificate
`type` : | the type of algorithm for the fingerprint.
Returns : | an allocated hex string which contains the fingerprint.