1 files changed, 64 insertions, 0 deletions

diff --git a/nacl/crypto_stream/aes128ctr/portable/common.c b/nacl/crypto_stream/aes128ctr/portable/common.c
new file mode 100644
index 00000000..14a28cc6
--- /dev/null
+++ b/nacl/crypto_stream/aes128ctr/portable/common.c
@@ -0,0 +1,64 @@
+#include "common.h"
+
+uint32 load32_bigendian(const unsigned char *x)
+{
+  return
+      (uint32) (x[3]) \
+  | (((uint32) (x[2])) << 8) \
+  | (((uint32) (x[1])) << 16) \
+  | (((uint32) (x[0])) << 24)
+  ;
+}
+
+void store32_bigendian(unsigned char *x,uint32 u)
+{
+  x[3] = u; u >>= 8;
+  x[2] = u; u >>= 8;
+  x[1] = u; u >>= 8;
+  x[0] = u;
+}
+
+uint32 load32_littleendian(const unsigned char *x)
+{
+  return
+      (uint32) (x[0]) \
+  | (((uint32) (x[1])) << 8) \
+  | (((uint32) (x[2])) << 16) \
+  | (((uint32) (x[3])) << 24)
+  ;
+}
+
+void store32_littleendian(unsigned char *x,uint32 u)
+{
+  x[0] = u; u >>= 8;
+  x[1] = u; u >>= 8;
+  x[2] = u; u >>= 8;
+  x[3] = u;
+}
+
+
+uint64 load64_littleendian(const unsigned char *x)
+{
+  return
+      (uint64) (x[0]) \
+  | (((uint64) (x[1])) << 8) \
+  | (((uint64) (x[2])) << 16) \
+  | (((uint64) (x[3])) << 24)
+  | (((uint64) (x[4])) << 32)
+  | (((uint64) (x[5])) << 40)
+  | (((uint64) (x[6])) << 48)
+  | (((uint64) (x[7])) << 56)
+  ;
+}
+
+void store64_littleendian(unsigned char *x,uint64 u)
+{
+  x[0] = u; u >>= 8;
+  x[1] = u; u >>= 8;
+  x[2] = u; u >>= 8;
+  x[3] = u; u >>= 8;
+  x[4] = u; u >>= 8;
+  x[5] = u; u >>= 8;
+  x[6] = u; u >>= 8;
+  x[7] = u;
+}