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Original file line number | Diff line number | Diff line change |
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@@ -223,10 +223,7 @@ | |
</dict> | ||
<dict> | ||
<key>FooterText</key> | ||
<string>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]> | ||
<string>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 | ||
|
@@ -245,26 +242,6 @@ 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-2.0</string> | ||
|
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