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@@ -4336,6 +4336,51 @@ SOFTWARE. | |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| ================================================================================ | ||
| The following copyright from Landon J. Fuller applies to the isAppEncrypted | ||
| function in Environment/third_party/GULAppEnvironmentUtil.m. | ||
| Copyright (c) 2017 Landon J. Fuller <[email protected]> | ||
| All rights reserved. | ||
| Permission is hereby granted, free of charge, to any person obtaining a copy of | ||
| this software and associated documentation files (the "Software"), to deal in | ||
| the Software without restriction, including without limitation the rights to | ||
| use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of | ||
| the Software, and to permit persons to whom the Software is furnished to do so, | ||
| subject to the following conditions: | ||
| The above copyright notice and this permission notice shall be included in all | ||
| copies or substantial portions of the Software. | ||
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS | ||
| FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR | ||
| COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER | ||
| IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | ||
| CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | ||
| Comment from | ||
| <a href="http://iphonedevwiki.net/index.php/Crack_prevention">iPhone Dev Wiki | ||
| Crack Prevention</a>: App Store binaries are signed by both their developer | ||
| and Apple. This encrypts the binary so that decryption keys are needed in order | ||
| to make the binary readable. When iOS executes the binary, the decryption keys | ||
| are used to decrypt the binary into a readable state where it is then loaded | ||
| into memory and executed. iOS can tell the encryption status of a binary via the | ||
| cryptid structure member of LC_ENCRYPTION_INFO MachO load command. If cryptid is | ||
| a non-zero value then the binary is encrypted. | ||
| 'Cracking' works by letting the kernel decrypt the binary then siphoning the | ||
| decrypted data into a new binary file, resigning, and repackaging. This will | ||
| only work on jailbroken devices as codesignature validation has been removed. | ||
| Resigning takes place because while the codesignature doesn't have to be valid | ||
| thanks to the jailbreak, it does have to be in place unless you have AppSync or | ||
| similar to disable codesignature checks. | ||
| More information at <a href="http://landonf.org/2009/02/index.html">Landon | ||
| Fuller's blog</a> | ||
| </string> | ||
| <key>License</key> | ||
| <string>Apache</string> | ||
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