Information processing apparatus, method of controlling the same, and storage medium
An information processing apparatus is provided. The apparatus comprises a verification unit configured to verify an application program; and a control unit configured to, in a case where the verification by the verification unit fails, determine whether or not to restore the application program based on a type of the application program, restore the application program in a case where the control unit determined that the application program is to be restored, not permit execution of the application program in a case where the control unit determined that the application program is not to be restored, and permit execution of an application program successfully verified by the verification unit or the restored application program.
1. An information processing apparatus comprising: a verification unit configured to verify an application program; and a control unit configured to permit execution of the application program in a case where the verifying of the application program is successful, in a case where the verification by the verification unit fails, determine whether the application program is stored in control software, recover the application program by restoring the application program stored in the control software in a case where the control unit determined that the application program is stored in the control software, permit execution of the application program that has been recovered; and not permit execution of the application program in a case where the control unit determined that the application program is not stored in the control software.
2. The information processing apparatus according to claim 1 , wherein
the verification unit calculates a hash value of the application program, and
the control unit determines that the verification is successful in a case where the calculated hash value matches a previously stored hash value.
3. The information processing apparatus according to claim 2 , wherein in a case where the application program is recovered by restoring the application program stored in the control software, the control unit re-installs the application program, calculates a hash value of the re-installed application program, and updates the previously stored hash value with the calculated hash value calculated for the re-installed application program.
4. The information processing apparatus according to claim 1 , further comprising;
a plurality of stages of loader units configured to load a program to be loaded, with a loader included in a basic input/output system as a first stage, and a loader for loading the application program as a final stage, wherein a loader of a next stage is verified by a loader of a preceding stage; and
a tamper-proof second verification unit configured to verify the basic input/output system, wherein
by the tamper-proof second verification unit, the basic input/output system is verified, and by each of the plurality of stages of loaders, a program and a loader of a next stage are read and verified.
5. The information processing apparatus according to claim 4 , wherein
the tamper-proof second verification unit verifies the basic input/output system by hardware.
6. The information processing apparatus according to claim 1 , further comprising:
a user interface unit, wherein
in a case where execution of the application program is not permitted by the control unit, it is indicated by the user interface unit that the execution of the application program is not permitted.
7. The information processing apparatus according to claim 6 , wherein
in a case where the application program whose execution is prohibited is a login application, provision of a function by the information processing apparatus is stopped.
8. The information processing apparatus according to claim 1 , further comprising
a printer unit, and
a scanner unit.
9. A method of controlling an information processing apparatus, the method comprising: performing a verification of an application program by a verification unit; permitting execution of the application program in a case where the verifying of the application program is successful; in a case where the verification by the verification unit fails, determining by a control unit whether the application program is stored in control software recovering the application program by restoring the application program stored in the control software in a case where the control unit determined that the application program is stored in the control software; permitting execution of the application program that has been recovered; and not permitting execution of the application program in a case where the control unit determined that the application program is not stored in the control software.
10. A non-transitory non-volatile storage medium having stored thereon a program, the program being for causing a computer to function as: a verification unit configured to verify an application program; and a control unit configured to permit execution of the application program in a case where the verifying of the application program is successful, in a case where the verification by the verification unit fails, determine whether the application program is stored in control software, recover the application program by restoring the application program stored in the control software in a case where the control unit determined that the application program is stored in the control software, permit execution of the application program that has been recovered; and not permit execution of the application program in a case where the control unit determined that the application program is not stored in the control software.