X-Git-Url: http://git.vrable.net/?a=blobdiff_plain;f=bluesky%2Fcrypto.c;h=6981f45be9b0c8f197e5b1e03aa2132f530f7e56;hb=b7e08dcf6552eb8977ccef56f00e775da8133cf8;hp=fff4e0dd0cf476151a88d2b4bc25bef6370fff1a;hpb=03476a3d39444ff2a09174e945ab645508c2224c;p=bluesky.git

diff --git a/bluesky/crypto.c b/bluesky/crypto.c
index fff4e0d..6981f45 100644
--- a/bluesky/crypto.c
+++ b/bluesky/crypto.c
@@ -7,15 +7,14 @@
  */
 
 #include <stdint.h>
+#include <assert.h>
 #include <errno.h>
 #include <pthread.h>
 #include <glib.h>
 #include <string.h>
 #include <gcrypt.h>
 
-#include "bluesky.h"
-
-static int DISABLE_CRYPTO = 1;
+#include "bluesky-private.h"
 
 /* Cryptographic operations.  The rest of the BlueSky code merely calls into
  * the functions in this file, so this is the only point where we interface
@@ -43,14 +42,25 @@ void bluesky_crypt_random_bytes(guchar *buf, gint len)
     gcry_randomize(buf, len, GCRY_STRONG_RANDOM);
 }
 
+/* Hash a string down to an encryption key. */
+void bluesky_crypt_hash_key(const char *keystr, uint8_t *out)
+{
+    guint8 raw_csum[32];
+    gsize csum_len = sizeof(raw_csum);
+
+    assert(CRYPTO_KEY_SIZE == 16);
+
+    GChecksum *csum = g_checksum_new(G_CHECKSUM_SHA256);
+    g_checksum_update(csum, keystr, strlen(keystr));
+    g_checksum_get_digest(csum, raw_csum, &csum_len);
+    g_checksum_free(csum);
+
+    memcpy(out, raw_csum, CRYPTO_KEY_SIZE);
+}
+
 /* Encrypt a data block. */
 BlueSkyRCStr *bluesky_crypt_encrypt(BlueSkyRCStr *in, const uint8_t *key)
 {
-    if (DISABLE_CRYPTO) {
-        bluesky_string_ref(in);
-        return in;
-    }
-
     gcry_error_t status;
     gcry_cipher_hd_t handle;
 
@@ -91,11 +101,6 @@ BlueSkyRCStr *bluesky_crypt_encrypt(BlueSkyRCStr *in, const uint8_t *key)
 /* Decrypt a data block. */
 BlueSkyRCStr *bluesky_crypt_decrypt(BlueSkyRCStr *in, const uint8_t *key)
 {
-    if (DISABLE_CRYPTO) {
-        bluesky_string_ref(in);
-        return in;
-    }
-
     gcry_error_t status;
     gcry_cipher_hd_t handle;