enum GChecksumType

typedef enum {
  G_CHECKSUM_MD5,
  G_CHECKSUM_SHA1,
  G_CHECKSUM_SHA256
} GChecksumType;

The hashing algorithm to be used by GChecksum when performing the digest of some data.

Note that the GChecksumType enumeration may be extended at a later date to include new hashing algorithm types.

Since 2.16

g_checksum_type_get_length ()

gssize              g_checksum_type_get_length          (GChecksumType checksum_type);

Gets the length in bytes of digests of type checksum_type

Since 2.16

GChecksum

typedef struct _GChecksum GChecksum;

An opaque structure representing a checksumming operation. To create a new GChecksum, use g_checksum_new(). To free a GChecksum, use g_checksum_free().

Since 2.16

g_checksum_new ()

GChecksum*          g_checksum_new                      (GChecksumType checksum_type);

Creates a new GChecksum, using the checksum algorithm checksum_type. If the checksum_type is not known, NULL is returned. A GChecksum can be used to compute the checksum, or digest, of an arbitrary binary blob, using different hashing algorithms.

A GChecksum works by feeding a binary blob through g_checksum_update() until there is data to be checked; the digest can then be extracted using g_checksum_get_string(), which will return the checksum as a hexadecimal string; or g_checksum_get_digest(), which will return a vector of raw bytes. Once either g_checksum_get_string() or g_checksum_get_digest() have been called on a GChecksum, the checksum will be closed and it won't be possible to call g_checksum_update() on it anymore.

Since 2.16

g_checksum_copy ()

GChecksum*          g_checksum_copy                     (const GChecksum *checksum);

Copies a GChecksum. If checksum has been closed, by calling g_checksum_get_string() or g_checksum_get_digest(), the copied checksum will be closed as well.

Since 2.16

g_checksum_free ()

void                g_checksum_free                     (GChecksum *checksum);

Frees the memory allocated for checksum.

Since 2.16

g_checksum_reset ()

void                g_checksum_reset                    (GChecksum *checksum);

Resets the state of the checksum back to it's initial state.

Since 2.18

g_checksum_update ()

void                g_checksum_update                   (GChecksum *checksum,
                                                         const guchar *data,
                                                         gssize length);

Feeds data into an existing GChecksum. The checksum must still be open, that is g_checksum_get_string() or g_checksum_get_digest() must not have been called on checksum.

Since 2.16

g_checksum_get_string ()

const gchar*        g_checksum_get_string               (GChecksum *checksum);

Gets the digest as an hexadecimal string.

Once this function has been called the GChecksum can no longer be updated with g_checksum_update().

Since 2.16

g_checksum_get_digest ()

void                g_checksum_get_digest               (GChecksum *checksum,
                                                         guint8 *buffer,
                                                         gsize *digest_len);

Gets the digest from checksum as a raw binary vector and places it into buffer. The size of the digest depends on the type of checksum.

Once this function has been called, the GChecksum is closed and can no longer be updated with g_checksum_update().

Since 2.16

g_compute_checksum_for_data ()

gchar*              g_compute_checksum_for_data         (GChecksumType checksum_type,
                                                         const guchar *data,
                                                         gsize length);

Computes the checksum for a binary data of length. This is a convenience wrapper for g_checksum_new(), g_checksum_get_string() and g_checksum_free().

Since 2.16

g_compute_checksum_for_string ()

gchar*              g_compute_checksum_for_string       (GChecksumType checksum_type,
                                                         const gchar *str,
                                                         gssize length);

Computes the checksum of a string.

Since 2.16