commit ae97c26bfbed509184443627e6001f6536fd6a16
Author: Marek Isalski <maz@from-this-height.tenebrae.faelix.org>
Date:   Sat Mar 12 12:52:20 2016 +0100

    initial version of fulcrm_uuid

diff --git a/fulcrm_uuid.info b/fulcrm_uuid.info
new file mode 100644
index 0000000..72f297b
--- /dev/null
+++ b/fulcrm_uuid.info
@@ -0,0 +1,5 @@
+name = fulcrm webhook
+description = fulcrm webhooks
+core = 7.x
+package = fulcrm
+configure = admin/config/services/fulcrm/webhook
diff --git a/fulcrm_uuid.install b/fulcrm_uuid.install
new file mode 100644
index 0000000..37dea99
--- /dev/null
+++ b/fulcrm_uuid.install
@@ -0,0 +1,32 @@
+<?php /* -*- php -*- */
+
+function _fulcrm_uuid_stir_entropy() {
+  $entropy = '';
+
+  $entropy .= mt_rand();
+  $entropy .= rand();
+
+  $entropy .= time();
+  if ( function_exists( 'microtime' ) )
+    $entropy .= microtime();
+
+  $entropy .= variable_get( 'cron_key', '' );
+  $entropy .= variable_get( 'cron_last', '' );
+  $entropy .= variable_get( 'drupal_private_key', '' );
+  $entropy .= variable_get( 'site_name', '' );
+
+  if ( function_exists( 'openssl_random_pseudo_bytes' ) )
+    $entropy .= openssl_random_pseudo_bytes( 32 );
+
+  $handle = fopen( '/dev/urandom', 'r' );
+  $entropy .= fread( $handle, 32 );
+  fclose( $handle );
+
+  $old_entropy = variable_get( 'fulcrm_uuid_entropy_1', '' ) . variable_get( 'fulcrm_uuid_entropy_2', '' );
+  variable_set( 'fulcrm_uuid_entropy_1', sha1( $entropy ) );
+  variable_set( 'fulcrm_uuid_entropy_2', md5( $old_entropy . $entropy ) );
+}
+
+function fulcrm_uuid_install() {
+  _fulcrm_uuid_stir_entropy();
+}
diff --git a/fulcrm_uuid.module b/fulcrm_uuid.module
new file mode 100644
index 0000000..08de430
--- /dev/null
+++ b/fulcrm_uuid.module
@@ -0,0 +1,52 @@
+<?php /* -*- php -*- */
+
+function fulcrm_uuid_stir_mt_srand() {
+    $e1 = variable_get( 'fulcrm_uuid_entropy_1', '' );
+    mt_srand( crc32( $e1 ) );
+}
+
+function fulcrm_uuid_stir_entropy() {
+    fulcrm_uuid_stir_mt_srand();
+
+    $entropy = '';
+
+    $entropy .= mt_rand();
+    $entropy .= rand();
+
+    $entropy .= time();
+    if ( function_exists( 'microtime' ) )
+        $entropy .= microtime();
+
+    $entropy .= variable_get( 'cron_key', '' );
+    $entropy .= variable_get( 'cron_last', '' );
+    $entropy .= variable_get( 'drupal_private_key', '' );
+    $entropy .= variable_get( 'site_name', '' );
+
+    if ( function_exists( 'openssl_random_pseudo_bytes' ) )
+        $entropy .= openssl_random_pseudo_bytes( 32 );
+
+    $handle = fopen( '/dev/urandom', 'r' );
+    $entropy .= fread( $handle, 32 );
+    fclose( $handle );
+
+    $old_entropy = ( variable_get( 'fulcrm_uuid_entropy_1', '' ) .
+                     variable_get( 'fulcrm_uuid_entropy_2', '' ) );
+    variable_set( 'fulcrm_uuid_entropy_1', sha1( $entropy ) );
+    variable_set( 'fulcrm_uuid_entropy_2', md5( $old_entropy . $entropy ) );
+
+    fulcrm_uuid_stir_mt_srand();
+}
+
+function fulcrm_uuid_cron() {
+    fulcrm_uuid_stir_entropy();
+}
+
+function fulcrm_uuid_uuid4() {
+    $data = ( variable_get( 'fulcrm_uuid_entropy_2', '' ) .
+              uniqid( $more_entropy = true ) .
+              variable_get( 'fulcrm_uuid_entropy_2', '' ) );
+    $data = hex2bin( md5( $data ) );
+    $data[ 6 ] = chr( ord( $data[ 6 ] ) & 0x0f | 0x40 );
+    $data[ 8 ] = chr( ord( $data[ 8 ] ) & 0x3f | 0x80 );
+    return vsprintf( '%s%s-%s-%s-%s-%s%s%s', str_split( bin2hex( $data ), 4 ) );
+}