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authorBrion Vibber <brion@pobox.com>2010-03-22 12:17:45 -0700
committerBrion Vibber <brion@pobox.com>2010-03-22 12:17:45 -0700
commit27bfd1211d64298ee3c3b2d82d7b38ca1e1167ad (patch)
tree487110ff5e0d85e185e842d2d9d1c23087029844 /plugins/OStatus/lib
parent4168b9cec1f7b2e6421c018e56e3b9a13c14d581 (diff)
Math_BigInteger doesn't correctly handle serialization/deserialization for a value of 0, which can end up spewing notices to output and otherwise intefering with Salmon signature setup and verification when using memcached.
Worked around this with a subclass that fixes the wakeup, used for the stored 0 value in the subclassed Crypt_RSA.
Diffstat (limited to 'plugins/OStatus/lib')
-rw-r--r--plugins/OStatus/lib/safecrypt_rsa.php18
-rw-r--r--plugins/OStatus/lib/safemath_biginteger.php20
2 files changed, 38 insertions, 0 deletions
diff --git a/plugins/OStatus/lib/safecrypt_rsa.php b/plugins/OStatus/lib/safecrypt_rsa.php
new file mode 100644
index 000000000..f3aa2c928
--- /dev/null
+++ b/plugins/OStatus/lib/safecrypt_rsa.php
@@ -0,0 +1,18 @@
+<?php
+
+require_once 'Crypt/RSA.php';
+
+/**
+ * Crypt_RSA stores a Math_BigInteger with value 0, which triggers a bug
+ * in Math_BigInteger's wakeup function which spews notices to log or output.
+ * This wrapper replaces it with a version that survives serialization.
+ */
+class SafeCrypt_RSA extends Crypt_RSA
+{
+ function __construct()
+ {
+ parent::__construct();
+ $this->zero = new SafeMath_BigInteger();
+ }
+}
+
diff --git a/plugins/OStatus/lib/safemath_biginteger.php b/plugins/OStatus/lib/safemath_biginteger.php
new file mode 100644
index 000000000..c05e24d1e
--- /dev/null
+++ b/plugins/OStatus/lib/safemath_biginteger.php
@@ -0,0 +1,20 @@
+<?php
+
+require_once 'Math/BigInteger.php';
+
+/**
+ * Crypt_RSA stores a Math_BigInteger with value 0, which triggers a bug
+ * in Math_BigInteger's wakeup function which spews notices to log or output.
+ * This wrapper replaces it with a version that survives serialization.
+ */
+class SafeMath_BigInteger extends Math_BigInteger
+{
+ function __wakeup()
+ {
+ if ($this->hex == '') {
+ $this->hex = '0';
+ }
+ parent::__wakeup();
+ }
+}
+