Add libhashsum_init_keccak_hasher2

Signed-off-by: Mattias Andrée <maandree@kth.se>

1 files changed, 47 insertions, 0 deletions

diff --git a/libhashsum_init_keccak_hasher2.c b/libhashsum_init_keccak_hasher2.c
new file mode 100644
index 0000000..71631f6
--- /dev/null
+++ b/libhashsum_init_keccak_hasher2.c
@@ -0,0 +1,47 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+#ifdef SUPPORT_KECCAK
+
+
+int
+libhashsum_init_keccak_hasher2(struct libhashsum_hasher *this, const struct libhashsum_keccak_params *params)
+{
+	struct libkeccak_generalised_spec gspec;
+	struct libkeccak_spec spec;
+
+	libkeccak_generalised_spec_initialise(&gspec);
+	if ((params->ratebits | params->capbits |
+	     params->hashbits | params->statebits |
+	     params->wordbits) > (size_t)LONG_MAX)
+		goto einval;
+	if (params->ratebits)
+		gspec.bitrate = (long int)params->ratebits;
+	if (params->capbits)
+		gspec.capacity = (long int)params->capbits;
+	if (params->hashbits)
+		gspec.output = (long int)params->hashbits;
+	if (params->statebits)
+		gspec.state_size = (long int)params->statebits;
+	if (params->wordbits)
+		gspec.word_size = (long int)params->wordbits;
+	if (libkeccak_degeneralise_spec(&gspec, &spec) || libkeccak_spec_check(&spec)) {
+	einval:
+		errno = EINVAL;
+		return -1;
+	}
+
+	return libhashsum_init_keccak_hasher(this, (size_t)spec.bitrate, (size_t)spec.capacity,
+	                                           (size_t)gspec.output, params->squeezes);
+}
+
+
+#else
+int
+libhashsum_init_keccak_hasher2(struct libhashsum_hasher *this, const struct libhashsum_keccak_params *params)
+{
+	(void) this;
+	(void) params;
+	errno = ENOSYS;
+	return -1;
+}
+#endif