1 files changed, 79 insertions, 0 deletions
diff --git a/drivers/staging/skein/threefishApi.c b/drivers/staging/skein/threefishApi.c
new file mode 100644
index 000000000000..5afa0338aef4
--- /dev/null
+++ b/drivers/staging/skein/threefishApi.c
@@ -0,0 +1,79 @@
+
+
+#include <threefishApi.h>
+#include <stdlib.h>
+#include <string.h>
+
+void threefishSetKey(ThreefishKey_t* keyCtx, ThreefishSize_t stateSize,
+                     uint64_t* keyData, uint64_t* tweak)
+{
+    int keyWords = stateSize / 64;
+    int i;
+    uint64_t parity = KeyScheduleConst;
+
+    keyCtx->tweak[0] = tweak[0];
+    keyCtx->tweak[1] = tweak[1];
+    keyCtx->tweak[2] = tweak[0] ^ tweak[1];
+
+    for (i = 0; i < keyWords; i++) {
+        keyCtx->key[i] = keyData[i];
+        parity ^= keyData[i];
+    }
+    keyCtx->key[i] = parity;
+    keyCtx->stateSize = stateSize;
+}
+
+void threefishEncryptBlockBytes(ThreefishKey_t* keyCtx, uint8_t* in,
+                                uint8_t* out)
+{
+    u64b_t plain[SKEIN_MAX_STATE_WORDS];        /* max number of words*/
+    u64b_t cipher[SKEIN_MAX_STATE_WORDS];
+    
+    Skein_Get64_LSB_First(plain, in, keyCtx->stateSize / 64);   /* bytes to words */
+    threefishEncryptBlockWords(keyCtx, plain, cipher);
+    Skein_Put64_LSB_First(out, cipher, keyCtx->stateSize / 8);  /* words to bytes */
+}
+
+void threefishEncryptBlockWords(ThreefishKey_t* keyCtx, uint64_t* in,
+                                uint64_t* out)
+{
+    switch (keyCtx->stateSize) {
+        case Threefish256:
+            threefishEncrypt256(keyCtx, in, out);
+            break;
+        case Threefish512:
+            threefishEncrypt512(keyCtx, in, out);
+            break;
+        case Threefish1024:
+            threefishEncrypt1024(keyCtx, in, out);
+            break;
+    }
+}
+
+void threefishDecryptBlockBytes(ThreefishKey_t* keyCtx, uint8_t* in,
+                                uint8_t* out)
+{
+    u64b_t plain[SKEIN_MAX_STATE_WORDS];        /* max number of words*/
+    u64b_t cipher[SKEIN_MAX_STATE_WORDS];
+    
+    Skein_Get64_LSB_First(cipher, in, keyCtx->stateSize / 64);  /* bytes to words */
+    threefishDecryptBlockWords(keyCtx, cipher, plain);
+    Skein_Put64_LSB_First(out, plain, keyCtx->stateSize / 8);   /* words to bytes */
+}
+
+void threefishDecryptBlockWords(ThreefishKey_t* keyCtx, uint64_t* in,
+                                uint64_t* out)
+{
+    switch (keyCtx->stateSize) {
+        case Threefish256:
+            threefishDecrypt256(keyCtx, in, out);
+            break;
+        case Threefish512:
+            threefishDecrypt512(keyCtx, in, out);
+            break;
+        case Threefish1024:
+            threefishDecrypt1024(keyCtx, in, out);
+            break;
+    }
+}
+