--- /dev/null
+/*
+ * Copyright (c) 2013-2014 Apple Inc. All Rights Reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+
+/*
+ * SOSManifest.c - Manifest object and some manipulation around it
+ */
+
+#include <SecureObjectSync/SOSManifest.h>
+#include <SecureObjectSync/SOSDigestVector.h>
+#include <utilities/SecCFError.h>
+#include <utilities/SecCFWrappers.h>
+
+#include <securityd/SecDbKeychainItem.h> // for kc_copy_sha1, which needs to move to utilities
+
+CFStringRef kSOSManifestErrorDomain = CFSTR("com.apple.security.sos.manifest.error");
+
+/* SOSManifest implementation. */
+struct __OpaqueSOSManifest {
+ CFRuntimeBase _base;
+ CFDataRef digest;
+ CFDataRef digestVector;
+ struct SOSDigestVector dv;
+};
+
+CFGiblisWithCompareFor(SOSManifest)
+
+static void SOSManifestDestroy(CFTypeRef cf) {
+ SOSManifestRef mf = (SOSManifestRef)cf;
+ CFReleaseSafe(mf->digest);
+ CFReleaseSafe(mf->digestVector);
+}
+
+static Boolean SOSManifestCompare(CFTypeRef cf1, CFTypeRef cf2) {
+ SOSManifestRef mf1 = (SOSManifestRef)cf1;
+ SOSManifestRef mf2 = (SOSManifestRef)cf2;
+ return CFEqualSafe(SOSManifestGetDigest(mf1, NULL), SOSManifestGetDigest(mf2, NULL));
+}
+
+SOSManifestRef SOSManifestCreateWithData(CFDataRef data, CFErrorRef *error)
+{
+ SOSManifestRef manifest = CFTypeAllocate(SOSManifest, struct __OpaqueSOSManifest, kCFAllocatorDefault);
+ if (!manifest)
+ SecCFCreateErrorWithFormat(kSOSManifestCreateError, kSOSManifestErrorDomain, NULL, error, NULL, CFSTR("Failed to create manifest"));
+ else if (data)
+ manifest->digestVector = CFDataCreateCopy(kCFAllocatorDefault, data);
+ else
+ manifest->digestVector = CFDataCreate(kCFAllocatorDefault, NULL, 0);
+
+ assert(!manifest || manifest->digestVector != NULL);
+ return manifest;
+}
+
+SOSManifestRef SOSManifestCreateWithBytes(const uint8_t *bytes, size_t len,
+ CFErrorRef *error) {
+ CFDataRef data = CFDataCreate(kCFAllocatorDefault, bytes, (CFIndex)len);
+ SOSManifestRef manifest = SOSManifestCreateWithData(data, error);
+ CFReleaseSafe(data);
+ return manifest;
+}
+
+size_t SOSManifestGetSize(SOSManifestRef m) {
+ return m ? (size_t)CFDataGetLength(m->digestVector) : 0;
+}
+
+size_t SOSManifestGetCount(SOSManifestRef m) {
+ return m ? SOSManifestGetSize(m) / SOSDigestSize : 0;
+}
+
+const uint8_t *SOSManifestGetBytePtr(SOSManifestRef m) {
+ return m ? CFDataGetBytePtr(m->digestVector) : NULL;
+}
+
+CFDataRef SOSManifestGetData(SOSManifestRef m) {
+ return m ? m->digestVector : NULL;
+}
+
+const struct SOSDigestVector *SOSManifestGetDigestVector(SOSManifestRef manifest) {
+ if (!manifest) {
+ static struct SOSDigestVector nulldv = SOSDigestVectorInit;
+ return &nulldv;
+ }
+ manifest->dv.capacity = manifest->dv.count = SOSManifestGetCount(manifest);
+ manifest->dv.digest = (void *)SOSManifestGetBytePtr(manifest);
+ manifest->dv.unsorted = false;
+ return &manifest->dv;
+}
+
+bool SOSManifestDiff(SOSManifestRef a, SOSManifestRef b,
+ SOSManifestRef *a_minus_b, SOSManifestRef *b_minus_a,
+ CFErrorRef *error) {
+ bool result = true;
+ struct SOSDigestVector dvab = SOSDigestVectorInit, dvba = SOSDigestVectorInit;
+ SOSDigestVectorDiffSorted(SOSManifestGetDigestVector(a), SOSManifestGetDigestVector(b), &dvab, &dvba);
+ if (a_minus_b) {
+ *a_minus_b = SOSManifestCreateWithDigestVector(&dvab, error);
+ if (!*a_minus_b)
+ result = false;
+ }
+ if (b_minus_a) {
+ *b_minus_a = SOSManifestCreateWithDigestVector(&dvba, error);
+ if (!*b_minus_a)
+ result = false;
+ }
+ SOSDigestVectorFree(&dvab);
+ SOSDigestVectorFree(&dvba);
+ return result;
+}
+
+
+SOSManifestRef SOSManifestCreateWithDigestVector(struct SOSDigestVector *dv, CFErrorRef *error) {
+ if (!dv) return NULL;
+ if (dv->unsorted) SOSDigestVectorSort(dv);
+ return SOSManifestCreateWithBytes((const uint8_t *)dv->digest, dv->count * SOSDigestSize, error);
+}
+
+SOSManifestRef SOSManifestCreateWithPatch(SOSManifestRef base,
+ SOSManifestRef removals,
+ SOSManifestRef additions,
+ CFErrorRef *error) {
+ struct SOSDigestVector dvresult = SOSDigestVectorInit;
+ SOSManifestRef result;
+ if (SOSDigestVectorPatchSorted(SOSManifestGetDigestVector(base), SOSManifestGetDigestVector(removals),
+ SOSManifestGetDigestVector(additions), &dvresult, error)) {
+ result = SOSManifestCreateWithDigestVector(&dvresult, error);
+ } else {
+ result = NULL;
+ }
+ SOSDigestVectorFree(&dvresult);
+ return result;
+}
+
+// This is the set of elements in m2, but not in m1.
+SOSManifestRef SOSManifestCreateComplement(SOSManifestRef m1,
+ SOSManifestRef m2,
+ CFErrorRef *error) {
+ // m2 \ emptySet => m2
+ if (SOSManifestGetCount(m1) == 0)
+ return CFRetainSafe(m2);
+
+ struct SOSDigestVector dvresult = SOSDigestVectorInit;
+ SOSManifestRef result;
+ SOSDigestVectorComplementSorted(SOSManifestGetDigestVector(m1), SOSManifestGetDigestVector(m2), &dvresult);
+ result = SOSManifestCreateWithDigestVector(&dvresult, error);
+ SOSDigestVectorFree(&dvresult);
+ return result;
+}
+
+SOSManifestRef SOSManifestCreateIntersection(SOSManifestRef m1,
+ SOSManifestRef m2,
+ CFErrorRef *error) {
+ struct SOSDigestVector dvresult = SOSDigestVectorInit;
+ SOSManifestRef result;
+ SOSDigestVectorIntersectSorted(SOSManifestGetDigestVector(m1), SOSManifestGetDigestVector(m2), &dvresult);
+ result = SOSManifestCreateWithDigestVector(&dvresult, error);
+ SOSDigestVectorFree(&dvresult);
+ return result;
+}
+
+SOSManifestRef SOSManifestCreateUnion(SOSManifestRef m1,
+ SOSManifestRef m2,
+ CFErrorRef *error) {
+ struct SOSDigestVector dvresult = SOSDigestVectorInit;
+ SOSManifestRef result;
+ SOSDigestVectorUnionSorted(SOSManifestGetDigestVector(m1), SOSManifestGetDigestVector(m2), &dvresult);
+ result = SOSManifestCreateWithDigestVector(&dvresult, error);
+ SOSDigestVectorFree(&dvresult);
+ return result;
+}
+
+void SOSManifestForEach(SOSManifestRef m, void(^block)(CFDataRef e, bool *stop)) {
+ CFDataRef e;
+ const uint8_t *p, *q;
+ bool stop = false;
+ for (p = SOSManifestGetBytePtr(m), q = p + SOSManifestGetSize(m);
+ !stop && p + SOSDigestSize <= q; p += SOSDigestSize) {
+ e = CFDataCreateWithBytesNoCopy(0, p, SOSDigestSize, kCFAllocatorNull);
+ if (e) {
+ block(e, &stop);
+ CFRelease(e);
+ }
+ }
+}
+
+CFDataRef SOSManifestGetDigest(SOSManifestRef m, CFErrorRef *error) {
+ if (!m) return NULL;
+ if (!m->digest)
+ m->digest = kc_copy_sha1(SOSManifestGetSize(m), SOSManifestGetBytePtr(m), error);
+ return m->digest;
+}
+
+static CFStringRef SOSManifestCopyDescription(CFTypeRef cf) {
+ SOSManifestRef m = (SOSManifestRef)cf;
+ CFMutableStringRef desc = CFStringCreateMutable(0, 0);
+ CFStringAppendFormat(desc, NULL, CFSTR("<[%zu]"), SOSManifestGetCount(m));
+ __block size_t maxEntries = 8;
+ SOSManifestForEach(m, ^(CFDataRef e, bool *stop) {
+ const uint8_t *d = CFDataGetBytePtr(e);
+ CFStringAppendFormat(desc, NULL, CFSTR(" %02X%02X%02X%02X"), d[0], d[1], d[2], d[3]);
+ if (!--maxEntries) {
+ CFStringAppend(desc, CFSTR("..."));
+ *stop = true;
+ }
+ });
+ CFStringAppend(desc, CFSTR(">"));
+
+ return desc;
+}
projects / apple / security.git / blobdiff