1 files changed, 64 insertions, 0 deletions
diff --git a/lib/liboqs/src/sig/sphincs/pqclean_sphincs-sha256-128f-simple_clean/utils.h b/lib/liboqs/src/sig/sphincs/pqclean_sphincs-sha256-128f-simple_clean/utils.h
new file mode 100644
index 000000000..6d919a5f9
--- /dev/null
+++ b/lib/liboqs/src/sig/sphincs/pqclean_sphincs-sha256-128f-simple_clean/utils.h
@@ -0,0 +1,64 @@
+#ifndef PQCLEAN_SPHINCSSHA256128FSIMPLE_CLEAN_UTILS_H
+#define PQCLEAN_SPHINCSSHA256128FSIMPLE_CLEAN_UTILS_H
+
+#include "hash_state.h"
+#include "params.h"
+#include <stddef.h>
+#include <stdint.h>
+
+/**
+ * Converts the value of 'in' to 'outlen' bytes in big-endian byte order.
+ */
+void PQCLEAN_SPHINCSSHA256128FSIMPLE_CLEAN_ull_to_bytes(
+    unsigned char *out, size_t outlen, unsigned long long in);
+
+/**
+ * Converts the inlen bytes in 'in' from big-endian byte order to an integer.
+ */
+unsigned long long PQCLEAN_SPHINCSSHA256128FSIMPLE_CLEAN_bytes_to_ull(
+    const unsigned char *in, size_t inlen);
+
+/**
+ * Computes a root node given a leaf and an auth path.
+ * Expects address to be complete other than the tree_height and tree_index.
+ */
+void PQCLEAN_SPHINCSSHA256128FSIMPLE_CLEAN_compute_root(
+    unsigned char *root, const unsigned char *leaf,
+    uint32_t leaf_idx, uint32_t idx_offset,
+    const unsigned char *auth_path, uint32_t tree_height,
+    const unsigned char *pub_seed, uint32_t addr[8],
+    const hash_state *hash_state_seeded);
+
+/**
+ * For a given leaf index, computes the authentication path and the resulting
+ * root node using Merkle's TreeHash algorithm.
+ * Expects the layer and tree parts of the tree_addr to be set, as well as the
+ * tree type (i.e. PQCLEAN_SPHINCSSHA256128FSIMPLE_CLEAN_ADDR_TYPE_HASHTREE or PQCLEAN_SPHINCSSHA256128FSIMPLE_CLEAN_ADDR_TYPE_FORSTREE).
+ * Applies the offset idx_offset to indices before building addresses, so that
+ * it is possible to continue counting indices across trees.
+ */
+void PQCLEAN_SPHINCSSHA256128FSIMPLE_CLEAN_treehash_FORS_HEIGHT(
+    unsigned char *root, unsigned char *auth_path,
+    const unsigned char *sk_seed, const unsigned char *pub_seed,
+    uint32_t leaf_idx, uint32_t idx_offset,
+    void (*gen_leaf)(
+        unsigned char * /* leaf */,
+        const unsigned char * /* sk_seed */,
+        const unsigned char * /* pub_seed */,
+        uint32_t /* addr_idx */, const uint32_t[8] /* tree_addr */,
+        const hash_state * /* hash_state_seeded */),
+    uint32_t tree_addr[8], const hash_state *hash_state_seeded);
+
+void PQCLEAN_SPHINCSSHA256128FSIMPLE_CLEAN_treehash_TREE_HEIGHT(
+    unsigned char *root, unsigned char *auth_path,
+    const unsigned char *sk_seed, const unsigned char *pub_seed,
+    uint32_t leaf_idx, uint32_t idx_offset,
+    void (*gen_leaf)(
+        unsigned char * /* leaf */,
+        const unsigned char * /* sk_seed */,
+        const unsigned char * /* pub_seed */,
+        uint32_t /* addr_idx */, const uint32_t[8] /* tree_addr */,
+        const hash_state * /* hash_state_seeded */),
+    uint32_t tree_addr[8], const hash_state *hash_state_seeded);
+
+#endif