X-Git-Url: https://git.saurik.com/apple/security.git/blobdiff_plain/80e2389990082500d76eb566d4946be3e786c3ef..d8f41ccd20de16f8ebe2ccc84d47bf1cb2b26bbb:/Security/sec/SOSCircle/SecureObjectSync/SOSAccountCloudParameters.c?ds=sidebyside

diff --git a/Security/sec/SOSCircle/SecureObjectSync/SOSAccountCloudParameters.c b/Security/sec/SOSCircle/SecureObjectSync/SOSAccountCloudParameters.c
new file mode 100644
index 00000000..98c3826d
--- /dev/null
+++ b/Security/sec/SOSCircle/SecureObjectSync/SOSAccountCloudParameters.c
@@ -0,0 +1,85 @@
+//
+//  AccountCloudParameters.c
+//  sec
+//
+
+#include "SOSAccountPriv.h"
+#include <SecureObjectSync/SOSTransportKeyParameter.h>
+//
+// Cloud Paramters encode/decode
+//
+
+static size_t der_sizeof_cloud_parameters(SecKeyRef publicKey, CFDataRef paramters, CFErrorRef* error)
+{
+    size_t public_key_size = der_sizeof_public_bytes(publicKey, error);
+    size_t parameters_size = der_sizeof_data_or_null(paramters, error);
+    
+    return ccder_sizeof(CCDER_CONSTRUCTED_SEQUENCE, public_key_size + parameters_size);
+}
+
+static uint8_t* der_encode_cloud_parameters(SecKeyRef publicKey, CFDataRef paramters, CFErrorRef* error,
+                                            const uint8_t* der, uint8_t* der_end)
+{
+    uint8_t* original_der_end = der_end;
+    
+    return ccder_encode_constructed_tl(CCDER_CONSTRUCTED_SEQUENCE, original_der_end, der,
+                                       der_encode_public_bytes(publicKey, error, der,
+                                                               der_encode_data_or_null(paramters, error, der, der_end)));
+}
+
+static const uint8_t* der_decode_cloud_parameters(CFAllocatorRef allocator,
+                                                  CFIndex algorithmID, SecKeyRef* publicKey,
+                                                  CFDataRef *parameters,
+                                                  CFErrorRef* error,
+                                                  const uint8_t* der, const uint8_t* der_end)
+{
+    const uint8_t *sequence_end;
+    der = ccder_decode_sequence_tl(&sequence_end, der, der_end);
+    der = der_decode_public_bytes(allocator, algorithmID, publicKey, error, der, sequence_end);
+    der = der_decode_data_or_null(allocator, parameters, error, der, sequence_end);
+    
+    return der;
+}
+
+
+bool SOSAccountPublishCloudParameters(SOSAccountRef account, CFErrorRef* error){
+    bool success = false;
+    CFIndex cloud_der_len = der_sizeof_cloud_parameters(
+                                                        account->user_public,
+                                                        account->user_key_parameters,
+                                                        error);
+    CFMutableDataRef cloudParameters =
+    CFDataCreateMutableWithScratch(kCFAllocatorDefault, cloud_der_len);
+    
+    if (der_encode_cloud_parameters(account->user_public, account->user_key_parameters, error,
+                                    CFDataGetMutableBytePtr(cloudParameters),
+                                    CFDataGetMutablePastEndPtr(cloudParameters)) != NULL) {
+
+        CFErrorRef changeError = NULL;
+        if (SOSTrasnportKeyParameterPublishCloudParameters(account->key_transport, cloudParameters, error)) {
+            success = true;
+        } else {
+            SOSCreateErrorWithFormat(kSOSErrorSendFailure, changeError, error, NULL,
+                                     CFSTR("update parameters key failed [%@]"), cloudParameters);
+        }
+        CFReleaseSafe(changeError);
+    } else {
+        SOSCreateError(kSOSErrorEncodeFailure, CFSTR("Encoding parameters failed"), NULL, error);
+    }
+    
+    CFReleaseNull(cloudParameters);
+    
+    return success;
+}
+
+bool SOSAccountRetrieveCloudParameters(SOSAccountRef account, SecKeyRef *newKey,
+                                       CFDataRef derparms,
+                                       CFDataRef *newParameters, CFErrorRef* error) {
+    const uint8_t *parse_end = der_decode_cloud_parameters(kCFAllocatorDefault, kSecECDSAAlgorithmID,
+                                                           newKey, newParameters, error,
+                                                           CFDataGetBytePtr(derparms), CFDataGetPastEndPtr(derparms));
+    
+    if (parse_end == CFDataGetPastEndPtr(derparms)) return true;
+    return false;
+}
+