1 files changed, 88 insertions, 0 deletions
diff --git a/attic/historic/anode/libanode/secure_random.c b/attic/historic/anode/libanode/secure_random.c
new file mode 100644
index 00000000..4322d7de
--- /dev/null
+++ b/attic/historic/anode/libanode/secure_random.c
@@ -0,0 +1,88 @@
+/* libanode: the Anode C reference implementation
+ * Copyright (C) 2009-2010 Adam Ierymenko <adam.ierymenko@gmail.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include "impl/aes.h"
+#include "impl/misc.h"
+#include "anode.h"
+
+#ifdef WINDOWS
+#include <windows.h>
+#include <wincrypt.h>
+#endif
+
+struct AnodeSecureRandomImpl
+{
+  AnodeAesExpandedKey key;
+  unsigned char state[ANODE_AES_BLOCK_SIZE];
+  unsigned char block[ANODE_AES_BLOCK_SIZE];
+  unsigned int ptr;
+};
+
+AnodeSecureRandom *AnodeSecureRandom_new()
+{
+  unsigned char keybuf[ANODE_AES_KEY_SIZE + ANODE_AES_BLOCK_SIZE + ANODE_AES_BLOCK_SIZE];
+  unsigned int i;
+  struct AnodeSecureRandomImpl *srng;
+
+#ifdef WINDOWS
+  HCRYPTPROV hProv;
+  if (CryptAcquireContext(&hProv,NULL,NULL,PROV_RSA_FULL,CRYPT_VERIFYCONTEXT|CRYPT_SILENT)) {
+    CryptGenRandom(hProv,sizeof(keybuf),keybuf);
+    CryptReleaseContext(hProv,0);
+  }
+#else
+  FILE *urandf = fopen("/dev/urandom","rb");
+  if (urandf) {
+    fread((void *)keybuf,sizeof(keybuf),1,urandf);
+    fclose(urandf);
+  }
+#endif
+
+  for(i=0;i<sizeof(keybuf);++i)
+    keybuf[i] ^= (unsigned char)(Anode_rand() >> 5);
+
+  srng = malloc(sizeof(struct AnodeSecureRandomImpl));
+  Anode_aes256_expand_key(keybuf,&srng->key);
+  for(i=0;i<ANODE_AES_BLOCK_SIZE;++i)
+    srng->state[i] = keybuf[ANODE_AES_KEY_SIZE + i];
+  for(i=0;i<ANODE_AES_BLOCK_SIZE;++i)
+    srng->block[i] = keybuf[ANODE_AES_KEY_SIZE + ANODE_AES_KEY_SIZE + i];
+  srng->ptr = ANODE_AES_BLOCK_SIZE;
+
+  return (AnodeSecureRandom *)srng;
+}
+
+void AnodeSecureRandom_gen_bytes(AnodeSecureRandom *srng,void *buf,long count)
+{
+  long i,j;
+
+  for(i=0;i<count;++i) {
+    if (((struct AnodeSecureRandomImpl *)srng)->ptr == ANODE_AES_BLOCK_SIZE) {
+      Anode_aes256_encrypt(&((struct AnodeSecureRandomImpl *)srng)->key,((struct AnodeSecureRandomImpl *)srng)->state,((struct AnodeSecureRandomImpl *)srng)->state);
+      for(j=0;j<ANODE_AES_KEY_SIZE;++j)
+        ((struct AnodeSecureRandomImpl *)srng)->block[j] ^= ((struct AnodeSecureRandomImpl *)srng)->state[j];
+      ((struct AnodeSecureRandomImpl *)srng)->ptr = 0;
+    }
+    ((unsigned char *)buf)[i] = ((struct AnodeSecureRandomImpl *)srng)->block[((struct AnodeSecureRandomImpl *)srng)->ptr++];
+  }
+}
+
+void AnodeSecureRandom_delete(AnodeSecureRandom *srng)
+{
+  free(srng);
+}