10.5: Verify applications' digital signatures |
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Leopard supports signed applications to improve its security model. All the system utilities, in fact, come signed by Apple. To sign and check applications, the codesign command line utility is available. For example, to display all information about Terminal.app's code signature, open up a terminal and type:$ codesign -dvvv /Applications/Utilities/Terminal.appExecutable=/Applications/Utilities/Terminal.app/Contents/MacOS/Terminal Identifier=com.apple.Terminal Format=bundle with Mach-O universal (i386 ppc7400) CodeDirectory v=20001 size=2743 flags=0x0(none) hashes=131+3 location=embeddedSignature size=4064 Authority=Software Signing Authority=Apple Code Signing Certification Authority Authority=Apple Root CA Info.plist entries=22 Sealed Resources rules=9 files=63 Internal requirements count=0 size=12[robg adds: There's a good amount ...
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