3 files changed, 16 insertions, 1 deletions
diff --git a/includes/password/MWOldPassword.php b/includes/password/MWOldPassword.php
index afa5cacc..43c13553 100644
--- a/includes/password/MWOldPassword.php
+++ b/includes/password/MWOldPassword.php
@@ -44,5 +44,9 @@ class MWOldPassword extends ParameterizedPassword {
 			$this->args = array();
 			$this->hash = md5( $plaintext );
 		}
+
+		if ( !is_string( $this->hash ) || strlen( $this->hash ) < 32 ) {
+			throw new PasswordError( 'Error when hashing password.' );
+		}
 	}
 }
diff --git a/includes/password/MWSaltedPassword.php b/includes/password/MWSaltedPassword.php
index 6c6895a2..40d2b6a1 100644
--- a/includes/password/MWSaltedPassword.php
+++ b/includes/password/MWSaltedPassword.php
@@ -42,5 +42,9 @@ class MWSaltedPassword extends ParameterizedPassword {
 		}
 
 		$this->hash = md5( $this->args[0] . '-' . md5( $plaintext ) );
+
+		if ( !is_string( $this->hash ) || strlen( $this->hash ) < 32 ) {
+			throw new PasswordError( 'Error when hashing password.' );
+		}
 	}
 }
diff --git a/includes/password/Pbkdf2Password.php b/includes/password/Pbkdf2Password.php
index 080e3b0d..808fd8a6 100644
--- a/includes/password/Pbkdf2Password.php
+++ b/includes/password/Pbkdf2Password.php
@@ -55,8 +55,15 @@ class Pbkdf2Password extends ParameterizedPassword {
 				(int)$this->params['length'],
 				true
 			);
+			if ( !is_string( $hash ) ) {
+				throw new PasswordError( 'Error when hashing password.' );
+			}
 		} else {
-			$hashLen = strlen( hash( $this->params['algo'], '', true ) );
+			$hashLenHash = hash( $this->params['algo'], '', true );
+			if ( !is_string( $hashLenHash ) ) {
+				throw new PasswordError( 'Error when hashing password.' );
+			}
+			$hashLen = strlen( $hashLenHash );
 			$blockCount = ceil( $this->params['length'] / $hashLen );
 
 			$hash = '';