CN109543392A - The method and unit of root shell are temporarily opened in a kind of embedded Linux equipment - Google Patents
The method and unit of root shell are temporarily opened in a kind of embedded Linux equipment Download PDFInfo
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- CN109543392A CN109543392A CN201811414275.4A CN201811414275A CN109543392A CN 109543392 A CN109543392 A CN 109543392A CN 201811414275 A CN201811414275 A CN 201811414275A CN 109543392 A CN109543392 A CN 109543392A
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- root shell
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
- G06F21/44—Program or device authentication
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
- G06F21/31—User authentication
- G06F21/33—User authentication using certificates
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/64—Protecting data integrity, e.g. using checksums, certificates or signatures
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- Computer Security & Cryptography (AREA)
- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- Software Systems (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
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Abstract
The invention discloses a kind of method for temporarily opening root shell in embedded Linux equipment, equipment manufacturer generates the public private key pair for signature authentication when producing embedded Linux equipment；The public key being stored in the embedded Linux equipment in public private key pair；Include the following steps: step 1: the first hash value is obtained by the SN code and hash function of embedded Linux equipment；Step 2: obtaining license file from equipment manufacturer, and the 2nd hash value is obtained by public key and license file；The 2nd hash value is that equipment manufacturer generates according to SN code and hash function, and generates license file using private key signature；Step 3: comparing the first hash value and whether the 2nd hash value is consistent, if so, temporarily open root shell permission；If it is not, not opening root shell permission then.The purpose of the present invention is to provide methods and unit that root shell is temporarily opened in a kind of embedded Linux equipment, this method is in not open root shell, by dynamically load portion license file, interim open root shell facilitates orientation problem or the secondary development of client.
Description
Technical field
The present invention relates to field of communication technology, root is temporarily opened in specifically a kind of embedded Linux equipment
The method and unit of shell.
Background technique
In current embedded Linux equipment, for root shell, there are two types of modes, and one is open root
Shell, but the research staff of only producer knows, when research staff leaves office, it is possible to lead to root shell password
Leakage, causes risk to equipment；Another kind is due to safety concerns, root shell not to be opened, in this case, if equipment
It goes wrong or client wants to do secondary development in equipment, there will be bigger technology barriers.
Summary of the invention
The purpose of the present invention is to provide a kind of methods that root shell is temporarily opened in embedded Linux equipment, should
Method is in not open root shell, and by dynamically load portion license file, interim open root shell is convenient
The secondary development of orientation problem or client.
Specific technical solution of the invention are as follows: the side of root shell is temporarily opened in a kind of embedded Linux equipment
Method, equipment manufacturer generate the public private key pair for signature authentication when producing embedded Linux equipment；Described is embedded
The public key being stored in linux equipment in public private key pair；Include the following steps:
Step 1: the first hash value is obtained by the SN code and hash function of embedded Linux equipment；
Step 2: obtaining license file from equipment manufacturer, and obtain second by public key and license file
Hash value；The 2nd hash value is that equipment manufacturer generates according to SN code and hash function, and is generated using private key signature
License file；
Step 3: comparing the first hash value and whether the 2nd hash value is consistent, if so, temporarily open root shell power
Limit；If it is not, not opening root shell permission then.
In the method for temporarily opening root shell in above-mentioned embedded Linux equipment, the hash function is
SHA256。
In the method for temporarily opening root shell in above-mentioned embedded Linux equipment, the public key is stored in
The OTP region of embedded Linux equipment.
In the method for temporarily opening root shell in above-mentioned embedded Linux equipment, the license file
Generating mode are as follows:
Step 10: equipment manufacturer obtains the SN code of embedded Linux equipment, and is calculated second according to hash function
Hash value；
Step 20: equipment manufacturer uses private key signature to the 2nd hash value, obtains license file.
Meanwhile the invention also discloses the units that root shell is temporarily opened in a kind of embedded Linux equipment, including
Following module:
License module: for obtaining license file provided by equipment manufacturer；
First hash value generation module: SN code and hash function for passing through embedded Linux equipment obtain first
Hash value；
2nd hash value obtains module: the license file for obtaining to license module is obtained by public key signature
Obtain the 2nd hash value；
Comparison module: for the first hash value and the 2nd hash value to be compared；
Execution module: root shell permission is temporarily opened for determining whether according to the comparison result of comparison module.
Compared with prior art, the beneficial effects of the present invention are:
The present invention is in not open root shell, by dynamically load portion license file, temporarily opens root
Shell facilitates orientation problem or the secondary development of client.
Detailed description of the invention
Fig. 1 is the flow chart of the embodiment of the present invention 1；
Fig. 2 is the structural block diagram of the embodiment of the present invention 2.
Specific embodiment
With reference to embodiment, technical solution of the present invention is described in further detail, but do not constituted pair
Any restrictions of the invention.
Embodiment 1
As shown in Figure 1, a kind of method for temporarily opening root shell in embedded Linux equipment, equipment manufacturer exist
The public private key pair for being used for signature authentication is generated when producing embedded Linux equipment；It is stored in the embedded Linux equipment
Public key in public private key pair；In general, the OTP region of embedded Linux equipment will not be wiped free of to store the public key.
This method includes the following steps:
Step 1: the first hash value is obtained by the SN code and hash function of embedded Linux equipment；
Hash function is SHA256, since SN code is all unique, generating first for any equipment
Hash value is also unique.
Step 2: obtaining license file from equipment manufacturer, and obtain second by public key and license file
Hash value；The 2nd hash value is that equipment manufacturer generates according to SN code and hash function, and is generated using private key signature
License file；
Any third party or client can obtain in the case where equipment manufacturer agrees to from equipment manufacturer
License file.It can sign to license file using with the matched public key of private key, signature can obtain after passing through
The 2nd hash value in license file.
Equipment manufacturer has just made license file in process of production under normal circumstances；
Make the main method of license file are as follows:
Step 10: equipment manufacturer obtains the SN code of embedded Linux equipment, and is calculated second according to hash function
Hash value；
Step 20: equipment manufacturer uses private key signature to the 2nd hash value, obtains license file.
Step 3: comparing the first hash value and whether the 2nd hash value is consistent, if so, temporarily open root shell power
Limit；If it is not, not opening root shell permission then.
By the above method, if the third party or client will obtain root shell permission, as long as being produced from equipment
License file is obtained at quotient.The interim opening of the permission of root shell may be implemented.
Embodiment 2
As shown in Fig. 2, temporarily opening the unit of root shell, including following module in a kind of embedded Linux equipment:
License module 1: for obtaining license file provided by equipment manufacturer；Equipment manufacturer's ordinary circumstance
Under just made license file in process of production；Make the main method of license file are as follows:
Step 10: equipment manufacturer obtains the SN code of embedded Linux equipment, and is calculated according to hash function SHA256
To the 2nd hash value；
Step 20: equipment manufacturer uses private key signature to the 2nd hash value, obtains license file.
First hash value generation module 2: SN code and hash function SHA256 for passing through embedded Linux equipment obtain
First hash value；
2nd hash value obtains module 3: the license file for obtaining to license module is obtained by public key signature
Obtain the 2nd hash value；
Comparison module 4: for the first hash value and the 2nd hash value to be compared；
Execution module 5: root shell permission is temporarily opened for determining whether according to the comparison result of comparison module.
During obtaining temporary authority, third party or client and equipment manufacturer are agreed to by linking up, then
License module 1 obtains license file, then obtains module 3 by the 2nd hash value and obtains the 2nd hash value；Pass through
One hash value generation module 2 obtains the first hash value；The oneth hash value and the 2nd hash value are compared by comparison module 4
It is right, then decide whether open root shell permission according to result execution module 5.
Above-described is only presently preferred embodiments of the present invention, all made within the scope of the spirit and principles in the present invention
What modifications, equivalent substitutions and improvements etc., should all be included in the protection scope of the present invention.
Claims (5)
1. a kind of method for temporarily opening root shell in embedded Linux equipment, equipment manufacturer is embedded in production
The public private key pair for being used for signature authentication is generated when linux equipment；It is stored in public private key pair in the embedded Linux equipment
Public key；It is characterized by comprising the following steps:
Step 1: the first hash value is obtained by the SN code and hash function of embedded Linux equipment；
Step 2: obtaining license file from equipment manufacturer, and the 2nd hash is obtained by public key and license file
Value；The 2nd hash value is that equipment manufacturer generates according to SN code and hash function, and is generated using private key signature
License file；
Step 3: comparing the first hash value and whether the 2nd hash value is consistent, if so, temporarily open root shell permission；If
It is no, then do not open root shell permission.
2. the method for temporarily opening root shell in embedded Linux equipment according to claim 1, feature exist
In the hash function is SHA256.
3. the method for temporarily opening root shell in embedded Linux equipment according to claim 2, feature exist
In the public key is stored in the OTP region of embedded Linux equipment.
4. the method for temporarily opening root shell in embedded Linux equipment according to claim 3, feature exist
In the generating mode of the license file are as follows:
Step 10: equipment manufacturer obtains the SN code of embedded Linux equipment, and the 2nd hash is calculated according to hash function
Value；
Step 20: equipment manufacturer uses private key signature to the 2nd hash value, obtains license file.
5. temporarily opening the unit of root shell in a kind of embedded Linux equipment, which is characterized in that including following module:
License module: for obtaining license file provided by equipment manufacturer；
First hash value generation module: for the SN code and hash function the first hash value of acquisition by embedded Linux equipment；
2nd hash value obtains module: license file for obtaining to license module is by public key signature, acquisition the
Two hash values；
Comparison module: for the first hash value and the 2nd hash value to be compared；
Execution module: root shell permission is temporarily opened for determining whether according to the comparison result of comparison module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811414275.4A CN109543392A (en) | 2018-11-26 | 2018-11-26 | The method and unit of root shell are temporarily opened in a kind of embedded Linux equipment |
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| CN201811414275.4A CN109543392A (en) | 2018-11-26 | 2018-11-26 | The method and unit of root shell are temporarily opened in a kind of embedded Linux equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112069494A (en) * | 2020-06-30 | 2020-12-11 | 西安万像电子科技有限公司 | Permission operation method and system of zero terminal |
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| CN112069494A (en) * | 2020-06-30 | 2020-12-11 | 西安万像电子科技有限公司 | Permission operation method and system of zero terminal |
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Address after: 511356 Room 501, building 2, No. 63, Yong'an Avenue, Huangpu District, Guangzhou, Guangdong Applicant after: Guangzhou lubangtong Internet of things Technology Co.,Ltd. Address before: 510653 3rd floor, building F, kehuiyuan, 95 Daguan Road, Tianhe District, Guangzhou City, Guangdong Province Applicant before: GUANGZHOU ROBUSTEL TECHNOLOGIES Co.,Ltd. |
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Application publication date: 20190329 |