From cabcb72dbbb2496d0383454a32bc4e8517b996e0 Mon Sep 17 00:00:00 2001
From: Alexander Vdolainen <avdolainen@zoho.com>
Date: Mon, 6 Jun 2016 00:12:06 +0300
Subject: [PATCH] sxt: added few key ops;

---
 include/sxt/sxtkey.h |   4 ++
 sxt/ppkp_ops.c       | 105 +++++++++++++++++++++++++++++++++++++------
 2 files changed, 96 insertions(+), 13 deletions(-)

diff --git a/include/sxt/sxtkey.h b/include/sxt/sxtkey.h
index d758d8e..56f85bc 100644
--- a/include/sxt/sxtkey.h
+++ b/include/sxt/sxtkey.h
@@ -37,6 +37,10 @@ typedef uint8_t ed25519_pubkey[ED25519_PK_LEN];
 typedef uint8_t ed25519_privkey[ED25519_SK_LEN];
 typedef uint8_t ed25519_signature[ED25519_SIG_LEN];
 
+/* flags */
+#define SXT_PPKP_PRIVATE  (1 << 2)
+#define SXT_PPKP_PUBLIC   (1 << 1)
+
 /* here the supported types in SXT */
 #define PPKP_ED25519  0xa
 
diff --git a/sxt/ppkp_ops.c b/sxt/ppkp_ops.c
index 9844385..9ae0541 100644
--- a/sxt/ppkp_ops.c
+++ b/sxt/ppkp_ops.c
@@ -26,29 +26,108 @@
 
 #include <stdlib.h>
 #include <stdio.h>
+#include <stdint.h>
 #include <errno.h>
 #include <string.h>
-#include <pthread.h>
 #include <sys/stat.h>
 #include <sys/time.h>
 #include <sys/types.h>
-#include <sys/mman.h>
 #include <fcntl.h>
 
-#ifdef WIN32
-#include <Winsock2.h>
-#define EBADE 1
-#define NETDB_SUCCESS 0
-#else
-#include <sys/select.h>
-#include <netdb.h>
-#include <unistd.h>
-#include <uuid/uuid.h>
-#endif
-
 #include <openssl/ssl.h>
 #include <openssl/err.h>
 #include <openssl/engine.h>
 
+#include <sxt/errno.h>
 #include <sxt/sxtkey.h>
 
+int sxt_key_generate(sxtkey_t *key, int type, int opt)
+{
+  int r = 0;
+
+  if(!key) return SXT_EINVAL;
+
+  /* set defaults */
+  key->type = type;
+  key->flags = SXT_PPKP_PRIVATE | SXT_PPKP_PUBLIC;
+
+  switch(type) {
+  case PPKP_ED25519:
+    key->pubkey = malloc(sizeof(ed25519_pubkey));
+    if(!key->pubkey) {
+      r = SXT_ENOMEM;
+      goto __fall;
+    }
+    key->privkey = malloc(sizeof(ed25519_privkey));
+    if(!key->privkey) {
+      r = SXT_ENOMEM;
+      goto __safefall0;
+    }
+
+    r = crypto_sign_ed25519_keypair(*key->pubkey, *key->privkey);
+    if(r) {
+      r = SXT_ECRYPTO;
+      goto __safefall0;
+    }
+    break;
+  default:
+    return SXT_EINVAL;
+  }
+
+  if(!r) return SXT_SUCCESS;
+
+ __safefall0:
+  if(key->pubkey) free(key->pubkey);
+  if(key->privkey) free(key->privkey);
+
+ __fall:
+  return r;
+}
+
+sxtkey_t *sxt_key_alloc(void)
+{
+  sxtkey_t *key = malloc(sizeof(sxtkey_t));
+
+  if(!key) return NULL;
+
+  return key;
+}
+
+void sxt_key_burn(sxtkey_t *key)
+{
+  if(!key) return;
+
+  key->priv = NULL;
+
+  switch(key->type) {
+  case PPKP_ED25519:
+    if(key->pubkey) memset(key->pubkey, 0, sizeof(ed25519_pubkey));
+    if(key->privkey) memset(key->privkey, 0, sizeof(ed25519_privkey));
+    break;
+  default:
+    return;
+  }
+
+  key->type = 0;
+  key->flags = 0;
+
+  return;
+}
+
+void sxt_key_free(sxtkey_t *key)
+{
+  if(!key) return;
+
+  switch(key->type) {
+  case PPKP_ED25519:
+    if(key->pubkey) free(key->pubkey);
+    if(key->privkey) free(key->privkey);
+    break;
+  default: return; /* cannot free unrecognized key due to the
+                    * potential memleak
+                    */
+  }
+
+  free(key);
+  return;
+}