1 files changed, 75 insertions, 0 deletions
diff --git a/lib/liboqs/src/sig/sphincs/pqclean_sphincs-sha256-256s-simple_clean/thash_sha256_simple.c b/lib/liboqs/src/sig/sphincs/pqclean_sphincs-sha256-256s-simple_clean/thash_sha256_simple.c
new file mode 100644
index 000000000..44023c41e
--- /dev/null
+++ b/lib/liboqs/src/sig/sphincs/pqclean_sphincs-sha256-256s-simple_clean/thash_sha256_simple.c
@@ -0,0 +1,75 @@
+#include <stdint.h>
+#include <string.h>
+
+#include "address.h"
+#include "params.h"
+#include "thash.h"
+
+#include "sha2.h"
+#include "sha256.h"
+
+/**
+ * Takes an array of inblocks concatenated arrays of PQCLEAN_SPHINCSSHA256256SSIMPLE_CLEAN_N bytes.
+ */
+static void PQCLEAN_SPHINCSSHA256256SSIMPLE_CLEAN_thash(
+    unsigned char *out, unsigned char *buf,
+    const unsigned char *in, unsigned int inblocks,
+    const unsigned char *pub_seed, uint32_t addr[8],
+    const sha256ctx *hash_state_seeded) {
+
+    unsigned char outbuf[PQCLEAN_SPHINCSSHA256256SSIMPLE_CLEAN_SHA256_OUTPUT_BYTES];
+    sha256ctx sha2_state;
+
+    (void)pub_seed; /* Suppress an 'unused parameter' warning. */
+
+    /* Retrieve precomputed state containing pub_seed */
+    sha256_inc_ctx_clone(&sha2_state, hash_state_seeded);
+
+    PQCLEAN_SPHINCSSHA256256SSIMPLE_CLEAN_compress_address(buf, addr);
+    memcpy(buf + PQCLEAN_SPHINCSSHA256256SSIMPLE_CLEAN_SHA256_ADDR_BYTES, in, inblocks * PQCLEAN_SPHINCSSHA256256SSIMPLE_CLEAN_N);
+
+    sha256_inc_finalize(outbuf, &sha2_state, buf, PQCLEAN_SPHINCSSHA256256SSIMPLE_CLEAN_SHA256_ADDR_BYTES + inblocks * PQCLEAN_SPHINCSSHA256256SSIMPLE_CLEAN_N);
+    memcpy(out, outbuf, PQCLEAN_SPHINCSSHA256256SSIMPLE_CLEAN_N);
+}
+
+/* The wrappers below ensure that we use fixed-size buffers on the stack */
+
+void PQCLEAN_SPHINCSSHA256256SSIMPLE_CLEAN_thash_1(
+    unsigned char *out, const unsigned char *in,
+    const unsigned char *pub_seed, uint32_t addr[8],
+    const sha256ctx *hash_state_seeded) {
+
+    unsigned char buf[PQCLEAN_SPHINCSSHA256256SSIMPLE_CLEAN_SHA256_ADDR_BYTES + 1 * PQCLEAN_SPHINCSSHA256256SSIMPLE_CLEAN_N];
+    PQCLEAN_SPHINCSSHA256256SSIMPLE_CLEAN_thash(
+        out, buf, in, 1, pub_seed, addr, hash_state_seeded);
+}
+
+void PQCLEAN_SPHINCSSHA256256SSIMPLE_CLEAN_thash_2(
+    unsigned char *out, const unsigned char *in,
+    const unsigned char *pub_seed, uint32_t addr[8],
+    const sha256ctx *hash_state_seeded) {
+
+    unsigned char buf[PQCLEAN_SPHINCSSHA256256SSIMPLE_CLEAN_SHA256_ADDR_BYTES + 2 * PQCLEAN_SPHINCSSHA256256SSIMPLE_CLEAN_N];
+    PQCLEAN_SPHINCSSHA256256SSIMPLE_CLEAN_thash(
+        out, buf, in, 2, pub_seed, addr, hash_state_seeded);
+}
+
+void PQCLEAN_SPHINCSSHA256256SSIMPLE_CLEAN_thash_WOTS_LEN(
+    unsigned char *out, const unsigned char *in,
+    const unsigned char *pub_seed, uint32_t addr[8],
+    const sha256ctx *hash_state_seeded) {
+
+    unsigned char buf[PQCLEAN_SPHINCSSHA256256SSIMPLE_CLEAN_SHA256_ADDR_BYTES + PQCLEAN_SPHINCSSHA256256SSIMPLE_CLEAN_WOTS_LEN * PQCLEAN_SPHINCSSHA256256SSIMPLE_CLEAN_N];
+    PQCLEAN_SPHINCSSHA256256SSIMPLE_CLEAN_thash(
+        out, buf, in, PQCLEAN_SPHINCSSHA256256SSIMPLE_CLEAN_WOTS_LEN, pub_seed, addr, hash_state_seeded);
+}
+
+void PQCLEAN_SPHINCSSHA256256SSIMPLE_CLEAN_thash_FORS_TREES(
+    unsigned char *out, const unsigned char *in,
+    const unsigned char *pub_seed, uint32_t addr[8],
+    const sha256ctx *hash_state_seeded) {
+
+    unsigned char buf[PQCLEAN_SPHINCSSHA256256SSIMPLE_CLEAN_SHA256_ADDR_BYTES + PQCLEAN_SPHINCSSHA256256SSIMPLE_CLEAN_FORS_TREES * PQCLEAN_SPHINCSSHA256256SSIMPLE_CLEAN_N];
+    PQCLEAN_SPHINCSSHA256256SSIMPLE_CLEAN_thash(
+        out, buf, in, PQCLEAN_SPHINCSSHA256256SSIMPLE_CLEAN_FORS_TREES, pub_seed, addr, hash_state_seeded);
+}