From 04a42492f11313a391bfef8339ad76f263d02b9c Mon Sep 17 00:00:00 2001
From: Andy Sawyer <git@pureabstract.org>
Date: Fri, 8 Jun 2012 21:19:23 +0100
Subject: [PATCH] Add OSX Implementation of SecRandomCopy

---
 Classes/NSData+AES.m              |  4 ++++
 OSX_Support/OSX_SecRandom.h       |  7 +++++++
 OSX_Support/OSX_SecRandom.m       | 33 +++++++++++++++++++++++++++++++
 PWStore.xcodeproj/project.pbxproj | 14 +++++++++++++
 4 files changed, 58 insertions(+)
 create mode 100644 OSX_Support/OSX_SecRandom.h
 create mode 100644 OSX_Support/OSX_SecRandom.m

diff --git a/Classes/NSData+AES.m b/Classes/NSData+AES.m
index 4a1a18e..6a55ad8 100644
--- a/Classes/NSData+AES.m
+++ b/Classes/NSData+AES.m
@@ -10,6 +10,10 @@
 #import <CommonCrypto/CommonCryptor.h>
 #import <CommonCrypto/CommonDigest.h>
 
+#if !TARGET_OS_IPHONE
+#import "OSX_SecRandom.h"
+#endif
+
 @implementation NSData (AES)
 -(NSMutableData *)sha256
 {
diff --git a/OSX_Support/OSX_SecRandom.h b/OSX_Support/OSX_SecRandom.h
new file mode 100644
index 0000000..538b361
--- /dev/null
+++ b/OSX_Support/OSX_SecRandom.h
@@ -0,0 +1,7 @@
+#if !TARGET_OS_IPHONE
+#import <stdint.h>
+#import <sys/types.h>
+typedef const struct __SecRandom * SecRandomRef;
+extern const SecRandomRef kSecRandomDefault;
+int SecRandomCopyBytes( SecRandomRef rnd, size_t count, uint8_t *bytes );
+#endif
diff --git a/OSX_Support/OSX_SecRandom.m b/OSX_Support/OSX_SecRandom.m
new file mode 100644
index 0000000..571f39f
--- /dev/null
+++ b/OSX_Support/OSX_SecRandom.m
@@ -0,0 +1,33 @@
+#if !TARGET_OS_IPHONE
+
+#import <unistd.h>
+#import <errno.h>
+#import <sys/fcntl.h>
+#import "OSX_SecRandom.h"
+
+const SecRandomRef kSecRandomDefault = NULL;
+
+int SecRandomCopyBytes( SecRandomRef rnd, size_t count, uint8_t *bytes )
+{
+    if( count == 0 )
+        return 0;
+
+    int fd = open("/dev/urandom",O_RDONLY);
+    if( fd < 0 ) {
+        return -1;
+    }
+  
+    size_t bytesRead;
+    uint8_t *p = bytes;
+  
+    do {
+        bytesRead = read( fd, p, count - ( p -bytes ) );
+        if( bytesRead > 0 ) {
+            p += bytesRead;
+        }
+    } while( bytesRead > 0 || ( bytesRead < 0 && errno == EINTR ) );
+    close( fd );
+  
+    return bytesRead < 0 ? -1 : 0;
+}
+#endif
diff --git a/PWStore.xcodeproj/project.pbxproj b/PWStore.xcodeproj/project.pbxproj
index 67bcf49..82e34ea 100755
--- a/PWStore.xcodeproj/project.pbxproj
+++ b/PWStore.xcodeproj/project.pbxproj
@@ -42,6 +42,7 @@
 		E3994FE1157AAA5E001CE6D3 /* PWItem+StringExport.m in Sources */ = {isa = PBXBuildFile; fileRef = E3994FE0157AAA5E001CE6D3 /* PWItem+StringExport.m */; };
 		E3995065157AB505001CE6D3 /* PWData+StringExport.m in Sources */ = {isa = PBXBuildFile; fileRef = E3995064157AB505001CE6D3 /* PWData+StringExport.m */; };
 		E3995284157CEAE7001CE6D3 /* libxml2.dylib in Frameworks */ = {isa = PBXBuildFile; fileRef = E3995283157CEAE7001CE6D3 /* libxml2.dylib */; };
+		E39AA44D1582928B00A93BCE /* OSX_SecRandom.m in Sources */ = {isa = PBXBuildFile; fileRef = E39AA44C1582928B00A93BCE /* OSX_SecRandom.m */; };
 		E3C91235157D3ACC0055AAD6 /* SyncViewController+TestDriver.m in Sources */ = {isa = PBXBuildFile; fileRef = E3C91234157D3ACC0055AAD6 /* SyncViewController+TestDriver.m */; };
 		E3C912F6157D4A040055AAD6 /* XmlDocument.m in Sources */ = {isa = PBXBuildFile; fileRef = E3C912F5157D4A040055AAD6 /* XmlDocument.m */; };
 /* End PBXBuildFile section */
@@ -106,6 +107,8 @@
 		E3995063157AB505001CE6D3 /* PWData+StringExport.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = "PWData+StringExport.h"; sourceTree = "<group>"; };
 		E3995064157AB505001CE6D3 /* PWData+StringExport.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = "PWData+StringExport.m"; sourceTree = "<group>"; };
 		E3995283157CEAE7001CE6D3 /* libxml2.dylib */ = {isa = PBXFileReference; lastKnownFileType = "compiled.mach-o.dylib"; name = libxml2.dylib; path = usr/lib/libxml2.dylib; sourceTree = SDKROOT; };
+		E39AA44B1582928B00A93BCE /* OSX_SecRandom.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = OSX_SecRandom.h; path = OSX_Support/OSX_SecRandom.h; sourceTree = "<group>"; };
+		E39AA44C1582928B00A93BCE /* OSX_SecRandom.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = OSX_SecRandom.m; path = OSX_Support/OSX_SecRandom.m; sourceTree = "<group>"; };
 		E3C91233157D3ACC0055AAD6 /* SyncViewController+TestDriver.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = "SyncViewController+TestDriver.h"; sourceTree = "<group>"; };
 		E3C91234157D3ACC0055AAD6 /* SyncViewController+TestDriver.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = "SyncViewController+TestDriver.m"; sourceTree = "<group>"; };
 		E3C912F4157D4A040055AAD6 /* XmlDocument.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = XmlDocument.h; sourceTree = "<group>"; };
@@ -164,6 +167,7 @@
 		29B97315FDCFA39411CA2CEA /* Other Sources */ = {
 			isa = PBXGroup;
 			children = (
+				E39AA44315828C5E00A93BCE /* OSX Support */,
 				28A0AAE50D9B0CCF005BE974 /* PWStore_Prefix.pch */,
 				29B97316FDCFA39411CA2CEA /* main.m */,
 			);
@@ -293,6 +297,15 @@
 			name = "User Interface";
 			sourceTree = "<group>";
 		};
+		E39AA44315828C5E00A93BCE /* OSX Support */ = {
+			isa = PBXGroup;
+			children = (
+				E39AA44B1582928B00A93BCE /* OSX_SecRandom.h */,
+				E39AA44C1582928B00A93BCE /* OSX_SecRandom.m */,
+			);
+			name = "OSX Support";
+			sourceTree = "<group>";
+		};
 		E3C9125E157D3C710055AAD6 /* Xml Parser */ = {
 			isa = PBXGroup;
 			children = (
@@ -394,6 +407,7 @@
 				E3995065157AB505001CE6D3 /* PWData+StringExport.m in Sources */,
 				E3C91235157D3ACC0055AAD6 /* SyncViewController+TestDriver.m in Sources */,
 				E3C912F6157D4A040055AAD6 /* XmlDocument.m in Sources */,
+				E39AA44D1582928B00A93BCE /* OSX_SecRandom.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};