g_hmac_new ()

GHmac *
g_hmac_new (GChecksumType digest_type,
            const guchar *key,
            gsize key_len);

Creates a new GHmac, using the digest algorithm digest_type . If the digest_type is not known, NULL is returned. A GHmac can be used to compute the HMAC of a key and an arbitrary binary blob, using different hashing algorithms.

A GHmac works by feeding a binary blob through g_hmac_update() until the data is complete; the digest can then be extracted using g_hmac_get_string(), which will return the checksum as a hexadecimal string; or g_hmac_get_digest(), which will return a array of raw bytes. Once either g_hmac_get_string() or g_hmac_get_digest() have been called on a GHmac, the HMAC will be closed and it won't be possible to call g_hmac_update() on it anymore.

Support for digests of type G_CHECKSUM_SHA512 has been added in GLib 2.42. Support for G_CHECKSUM_SHA384 was added in GLib 2.52.

Since: 2.30

g_hmac_copy ()

GHmac *
g_hmac_copy (const GHmac *hmac);

Copies a GHmac. If hmac has been closed, by calling g_hmac_get_string() or g_hmac_get_digest(), the copied HMAC will be closed as well.

Since: 2.30

g_hmac_ref ()

GHmac *
g_hmac_ref (GHmac *hmac);

Atomically increments the reference count of hmac by one.

This function is MT-safe and may be called from any thread.

Since: 2.30

g_hmac_unref ()

void
g_hmac_unref (GHmac *hmac);

Atomically decrements the reference count of hmac by one.

If the reference count drops to 0, all keys and values will be destroyed, and all memory allocated by the hash table is released. This function is MT-safe and may be called from any thread. Frees the memory allocated for hmac .

Since: 2.30

g_hmac_update ()

void
g_hmac_update (GHmac *hmac,
               const guchar *data,
               gssize length);

Feeds data into an existing GHmac.

The HMAC must still be open, that is g_hmac_get_string() or g_hmac_get_digest() must not have been called on hmac .

Since: 2.30

g_hmac_get_string ()

const gchar *
g_hmac_get_string (GHmac *hmac);

Gets the HMAC as an hexadecimal string.

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

The hexadecimal characters will be lower case.

Since: 2.30

g_hmac_get_digest ()

void
g_hmac_get_digest (GHmac *hmac,
                   guint8 *buffer,
                   gsize *digest_len);

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

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

Since: 2.30

g_compute_hmac_for_data ()

gchar *
g_compute_hmac_for_data (GChecksumType digest_type,
                         const guchar *key,
                         gsize key_len,
                         const guchar *data,
                         gsize length);

Computes the HMAC for a binary data of length . This is a convenience wrapper for g_hmac_new(), g_hmac_get_string() and g_hmac_unref().

The hexadecimal string returned will be in lower case.

Since: 2.30

g_compute_hmac_for_string ()

gchar *
g_compute_hmac_for_string (GChecksumType digest_type,
                           const guchar *key,
                           gsize key_len,
                           const gchar *str,
                           gssize length);

Computes the HMAC for a string.

The hexadecimal string returned will be in lower case.

Since: 2.30

g_compute_hmac_for_bytes ()

gchar *
g_compute_hmac_for_bytes (GChecksumType digest_type,
                          GBytes *key,
                          GBytes *data);

Computes the HMAC for a binary data . This is a convenience wrapper for g_hmac_new(), g_hmac_get_string() and g_hmac_unref().

The hexadecimal string returned will be in lower case.

Since: 2.50

GHmac

typedef struct _GHmac GHmac;

An opaque structure representing a HMAC operation. To create a new GHmac, use g_hmac_new(). To free a GHmac, use g_hmac_unref().

Since: 2.30