119 lines
4.9 KiB
Markdown
119 lines
4.9 KiB
Markdown
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# wolfSSL and wolfCrypt Xcode Projects for OS X and iOS
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This directory contains the following files:
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1. `wolfssl.xcworkspace` -- workspace with library and testsuite client
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2. `wolfssl_testsuite.xcodeproj` -- project to run the testsuite.
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3. `wolfssl.xcodeproj` -- project to build OS/x and iOS libraries for wolfSSL and/or wolfCrypt
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4. `wolfssl-FIPS.xcodeproj` -- project to build wolfSSL and wolfCrypt-FIPS if available
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5. `user_settings.h` -- custom library settings, which are shared across projects
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The library will output as `libwolfssl_osx.a` or 'libwolfssl_ios.a` depending on
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the target. It will also copy the wolfSSL/wolfCrypt (and the CyaSSL/CtaoCrypt
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compatibility) headers into an `include` directory located in
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`Build/Products/Debug` or `Build/Products/Release`.
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For the library and testsuite to link properly the build location needs to be
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configured as realitive to workspace.
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1. File -> Workspace Settings (or Xcode -> Preferences -> Locations -> Locations)
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2. Derived Data -> Advanced
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3. Custom -> Relative to Workspace
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4. Products -> Build/Products
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These Xcode projects define the `WOLFSSL_USER_SETTINGS` preprocessor
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to enable the `user_settings.h` file for setting macros across
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multiple projects.
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If needed the Xcode preprocessors can be modified with these steps:
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1. Click on the Project in "Project Navigator".
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2. Click on the "Build Settings" tab.
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3. Scroll down to the "Apple LLVM 6.0 - Preprocessing" section.
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4. Open the disclosure for "Preprocessor Macros" and use the "+" and
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"-" buttons to modify. Remember to do this for both Debug and Release.
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## wolfSSL
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This project should build wolfSSL and wolfCrypt using the default settings.
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## wolfSSL-FIPS
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To use the FIPS version, one must have the FIPS sources. The project won't
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build without them. Please contact info@wolfssl.com for more information about
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wolfCrypt with FIPS.
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By default, this builds the wolfSSL and wolfCrypt with FIPS library. The default
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configuration enables the settings required for FIPS. Others may be turned on.
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The project also ensures the FIPS related objects are linked in the proper
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order.
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# Building libwolfssl.a
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There are several options of builds. You can make a simulator build, or a
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device build. Both are debug builds.
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You can make an archive for a device, as well. That is a release build.
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## Known issues:
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When building for older i386 architectures and using tfm.c there are specific
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CFLAGS required to expose the necessary registers for inline assembly in tfm.c.
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An example script has been provided "build-for-i386.sh" that targets the watchos
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by default. If using SDK iphonesimulator10.1 or older you can change the SDK
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variable in that script however newer versions of the SDK no longer support
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i386 for the iphones.
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# Installing libwolfssl.a
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Simply drag the file libwolfssl_XXX_.a and the directory `include` and drop it into
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your project file list pane where it makes sense for you. Allow it to copy the
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files over to the project directory. This should automatically add the library
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to the list of libraries to link against.
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Click on your project target, then the "Build Phases" tab. On the targets list
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click your target. Click the disclosure triangle on the section "Link Binary
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With Libraries" and verify libwolfssl.a is in the list. If not, click the "+",
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and on the "Choose frameworks and libraries to add:" dialog, click the
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button "Add other..." then find the file libwolfssl.a.
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Click on the "Build Settings" tab. Scroll down to the section "Search Paths".
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Add the path to the include directory to the list "Header Search Paths".
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## When using FIPS
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When using the FIPS version the following preprocessors need to be defined:
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* `IPHONE`
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* `HAVE_FIPS`
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* `HAVE_HASHDRBG`
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* `HAVE_AESGCM`
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* `WOLFSSL_SHA512`
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* `WOLFSSL_SHA384`
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* `NO_MD4`
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* `NO_HC128`
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* `NO_RABBIT`
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* `NO_DSA`
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* `NO_PWDBASED`
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The approved FIPS source files are from the CyaSSL project tag v3.4.8.fips. The
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files fips.c and fips_test.c, and the wolfCAVP test app are from the FIPS
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project tag v3.4.8a. The wolfSSL/wolfCrypt files are from tag v3.4.8.
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# Using the FIPS library
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The FIPS library contains a self-check verify hash. Normally, on the desktop or
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server build, the library is built as a dynamic library. The library looks the
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same to every application that builds against it, and can be verified. For
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static libraries, when linking into your application, the addresses are all
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fixed, and the verify checksum becomes unusable. iOS does not allow dynamic
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libraries like this, so static builds are required. This creates a problem.
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Every time the application is changed, the FIPS checksum will change, because
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the FIPS library's position in the executable may change.
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You need to add something to your application that will output the verifyCore
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value to be used. The verifyCore in fips_test.c will need to be updated with
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this value, the library rebuilt, and relinked into your application. The
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application should not be changed during this process or the verifyCore check
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will fail again.
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