Hardware chip-based telephone protocol converter configuration method and system

Abstract

The application belongs to the technical field of equipment safety, and particularly relates to a telephone protocol converter configuration method and system based on a hardware chip, which comprises the following steps: generating a hardware fingerprint by using a chip identifier; mounting a read-only reference configuration directory and a protocol parameter dependency model by using the fingerprint, loading an incremental configuration directory of a transaction log structure; parsing each directory into a parameter set and merging the parameter set by retaining the latest value according to a time stamp; checking and automatically correcting invalid associated parameters by using the dependency model to generate a qualified configuration set; encrypting the configuration set, generating a check code, and storing the check code into the chip; and decrypting the configuration after the chip is running, and comparing the fingerprint with the check code. By means of the fingerprint authentication and time stamp merging mechanism, the application solves the complex configuration conflict, automatically corrects invalid parameters, realizes the strong binding of software and hardware, and effectively prevents data tampering.

Description

Technical Field

[0001] This invention relates to the field of device security technology. More specifically, this invention relates to a hardware chip-based telephone protocol converter configuration method and system. Background Technology

[0002] With the rapid development of communication technology, traditional telephone networks are deeply integrated with modern IP-based communication networks. In this process, telephone protocol converters, as core components for translating and adapting different communication protocols, play a crucial role. To meet the demands of high concurrency, low latency, and high reliability, telephone protocol converters are gradually evolving from pure software implementation to hardware chip-based implementation. In hardware chips, protocol converters rely on configuration parameters to operate, such as signaling mapping rules, port parameters, timeout thresholds, and encoding formats. The accuracy of these configuration parameters determines the correctness of the protocol conversion. However, due to changes in the communication environment and continuous adjustments in business requirements, configuration parameters need frequent updates and maintenance. Traditional configuration management typically employs a unified, full configuration file distribution method or simply modifies and overwrites existing configurations.

[0003] Existing configuration methods can maintain the basic operation of telephone protocol converters, but they have problems in practical applications of hardware chips. Protocol conversion involves numerous parameters, and full updates consume significant resources, prolonging chip initialization time; while simple incremental overwrite often lacks time tracking and conflict resolution mechanisms, easily leading to configuration state and version confusion. Telephone protocol parameters typically have close interactions and logical dependencies, and changes to individual parameters can easily disrupt the original dependency balance, causing related parameters to fail. Existing technologies lack automatic verification and correction mechanisms for parameter dependencies and numerical mappings during the configuration loading phase, often resulting in incorrect configurations that cause protocol conversion anomalies or communication interruptions. In network deployment environments, the configuration files loaded by hardware chips face security threats. Conventional configuration distribution processes lack strong binding verification mechanisms for specific hardware, making configuration data vulnerable to malicious tampering and unauthorized replacement, failing to guarantee the confidentiality, integrity, and authenticity of the configuration data's source. Summary of the Invention

[0004] To address the technical problems of existing configuration methods lacking conflict resolution and relying on verification and hardware binding mechanisms, which leads to the easy invalidation and tampering of configuration data, this invention provides solutions in the following aspects.

[0005] In a first aspect, the present invention provides a hardware chip-based telephone protocol converter configuration method, comprising: S1, obtaining a unique identifier of the hardware chip and performing a hash operation to generate a hardware fingerprint; mounting a read-only baseline configuration directory using the hardware fingerprint as an index, the directory recording parameter keys, parameter values, and initial timestamps, and loading a protocol parameter dependency model containing numerical mapping relationships as a reference table; loading a read-write-enabled incremental configuration directory, which uses a transaction log structure to record changes containing parameter keys, parameter values, and timestamps; S2, parsing the read-only baseline configuration directory and the incremental configuration directory into first and second configuration parameter sets containing timestamps in memory, respectively. The first set of configuration parameters is merged into the second set of configuration parameters. In case of conflict, the latest value is retained according to the timestamp to obtain the initial fusion set. The initial fusion set is verified using a reference table, and the failed associated parameters are automatically corrected according to the numerical mapping relationship to generate a verified configuration set. The verified configuration set is serialized into a binary image file, encrypted with the hardware fingerprint as the key, and a message authentication code is calculated in combination with the hardware fingerprint to generate a verification code. The encrypted binary image file and the verification code are loaded into the hardware chip memory. The hardware chip reproduces the hardware fingerprint through the unique identifier and recalculates the message authentication code. After comparison with the verification code, the configuration is decrypted and used.

[0006] This invention solves the configuration conflict and chaos problem under complex changes by introducing an incremental configuration catalog containing timestamps and a merging mechanism that retains the latest values ​​according to timestamps; it automatically corrects failed associated parameters by using the numerical mapping relationship in the reference table, eliminating logical failures caused by single-point parameter updates; and it uses the hardware native identifier to generate fingerprints for encryption and verification code comparison authentication, realizing a strong binding between software configuration and underlying hardware, successfully blocking illegal tampering with configuration data.

[0007] Preferably, obtaining the unique identifier of the hardware chip and performing a hash operation to generate a hardware fingerprint includes: reading the hardware identifier from the read-only secure storage area of ​​the hardware chip; adjusting the hardware identifier by a preset number of bits to achieve a standard input sequence; inputting the standard input sequence into a hash function for multiple iterative operations to generate a hash value; and truncating the last preset number of bits of the hash value as the hardware fingerprint.

[0008] This invention eliminates inconsistencies in the length of the underlying physical identifier and potential data regularity through standard padding and multiple hash iterations, significantly improving the randomness and security of fingerprints as encryption keys.

[0009] Preferably, mounting a read-only baseline configuration directory using a hardware fingerprint as an index and loading a protocol parameter dependency model containing numerical mapping relationships as a reference table includes: performing string matching based on the hardware fingerprint to find the corresponding read-only baseline configuration directory; calling the read-only baseline configuration directory through a read-only mounting command with anti-tampering attributes; parsing the nodes in the protocol parameter dependency model and constructing a directed acyclic graph data structure containing unidirectional associations and numerical mapping relationships between each protocol parameter as a reference table for configuration verification.

[0010] Preferably, loading an incremental configuration directory that supports reading and writing includes: creating an independent log append space for external configuration change operations; decomposing configuration change instructions into log records containing the parameter key, the parameter value, and a timestamp; and storing the log records sequentially in the incremental configuration directory using an append-only write mode, retaining all historical records.

[0011] The append-only mode of this invention can precisely shield the overwrite and erase operation at the underlying level, avoiding the loss of configuration data and system damage caused by file overwriting when the system is unexpectedly powered off or the environment is abnormal.

[0012] Preferably, parsing the read-only baseline configuration directory and the incremental configuration directory into first and second sets of configuration parameters containing timestamps in memory includes: reading files in the read-only baseline configuration directory and converting the files into a first memory key-value pair sequence indexed by parameter keys and containing initial timestamps; extracting log records in the incremental configuration directory and converting the log records into a second memory key-value pair sequence containing parameter keys, the latest parameter values, and corresponding timestamps.

[0013] Preferably, the second configuration parameter set is merged into the first configuration parameter set. In case of conflict, the latest value is retained according to the timestamp to obtain the initial fusion set, including: traversing the second configuration parameter set and querying whether there is a parameter key with the same name in the first configuration parameter set; if there is a parameter key with the same name, comparing the change time records, and determining that the timestamp of the change item in the second configuration parameter set is later than the record in the first configuration parameter set; based on the later determination result, replacing the original value in the first configuration parameter set with the parameter value in the second configuration parameter set.

[0014] This invention establishes a fine-grained coverage strategy accurate to the change time, ensuring that high-frequency modification operations with the same parameters can be accurately compared, and retaining and making the parameter configuration of the latest version effective.

[0015] Preferably, the verified configuration set is serialized into a binary image file and encrypted using a hardware fingerprint as the key, including: converting the verified configuration set into a continuous binary data stream; performing an XOR operation on the binary data stream using a pseudo-random sequence generated by the hardware fingerprint to generate an encrypted binary image file; and performing a message authentication code operation on the encrypted binary image file using the hardware fingerprint as the key, and extracting the generated message authentication code as the verification code.

[0016] This invention reduces the computational resource consumption of the microcontroller by using a combination of continuous binary streams and XOR stream encryption, and further locks the integrity of data transmission by binding a message authentication code on the basis of data ciphertext.

[0017] Preferably, the initial fusion set is verified using a reference table, and the failed associated parameters are automatically corrected according to the numerical mapping relationship. This includes: extracting independent parameters and associated parameters related to the independent parameters from the initial fusion set; after the independent parameters are updated, verifying that the associated parameters conform to the numerical mapping relationship using the reference table; when it is determined that the parameters have deviated from the numerical mapping relationship, obtaining a matching value through algebraic operations based on the numerical mapping relationship, and modifying the value of the associated parameter to the matching value.

[0018] Preferably, the hardware chip reproduces the hardware fingerprint using a unique identifier and recalculates the message authentication code. After the comparison with the verification code is successful, the configuration is decrypted and used. This includes: the hardware chip activates its built-in logic to extract the underlying fixed identifier and re-runs the hash iteration to obtain the reproduced hardware fingerprint; the reproduced hardware fingerprint is used to perform a hash message authentication operation on the encrypted binary image file to obtain the recalculated authentication code; when the recalculated authentication code matches the verification code, the plaintext configuration stream is restored through symmetric encryption inverse operation and provided to the protocol stack for invocation.

[0019] Secondly, the present invention provides a hardware chip-based telephone protocol converter configuration system, including a processor and a memory, wherein the memory stores computer program instructions, and when the computer program instructions are executed by the processor, the above-mentioned hardware chip-based telephone protocol converter configuration method is implemented.

[0020] By adopting the above technical solution, the above-mentioned hardware chip-based telephone protocol converter configuration method is generated into a computer program and stored in a memory so that it can be loaded and executed by a processor, thereby creating a terminal device based on the memory and processor for convenient use.

[0021] The beneficial effects of this invention are as follows:

[0022] This invention generates a hardware fingerprint using the unique identifier of the hardware chip, and uses it as a directory mounting index, encryption key, and verification basis. This achieves a strong binding between the configuration file and a specific chip, effectively preventing unauthorized tampering with configuration data and cross-device cloning, thus improving the underlying security of the system. By adopting a mechanism that separates read-only baseline configuration from incremental configuration in a transaction log structure, the storage overhead caused by frequent full configuration rewriting is reduced. By introducing a timestamp mechanism to merge configuration parameters and automatically correcting invalid related parameters based on the numerical mapping relationship of the protocol parameter dependency model, logical conflicts between protocol configurations are effectively eliminated, ensuring the accuracy and global consistency of configuration parameters.

[0023] Furthermore, this invention serializes the conflict-free configuration set into a binary image file and combines it with a message authentication code to implement hardware-level anti-counterfeiting verification. This not only ensures the integrity of the data loading process but also improves the execution efficiency of the chip in parsing and loading the configuration, providing a solid guarantee for the efficient and stable operation of the telephone protocol converter. Attached Figure Description

[0024] Figure 1 This is a flowchart of the hardware chip-based telephone protocol converter configuration method in this invention; Figure 2 This is a schematic diagram of the data length distribution at different processing stages in this invention; Figure 3 This is a schematic diagram illustrating the determination of timestamp overwrite and merging relationships in this invention; Figure 4 This is a schematic diagram showing the comparison of the safety and performance evaluation of the equipment system in this invention. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0026] This invention discloses a hardware chip-based telephone protocol converter configuration method, referring to... Figure 1 This includes steps S1-S3: S1. Obtain the chip identifier and load the configuration directory and reference table.

[0027] In an optional embodiment, a unique identifier of the hardware chip is obtained, and a hash operation is performed to generate a hardware fingerprint. Using the hardware fingerprint as an index, a corresponding read-only baseline configuration directory is mounted. The read-only baseline configuration directory records parameter keys, parameter values, and initial timestamps, and loads an associated protocol parameter dependency model containing numerical mapping relationships as a reference table for configuration verification. A read-write incremental configuration directory is loaded. The incremental configuration directory uses a transaction log structure to record changes containing parameter keys, parameter values, and timestamps.

[0028] The hardware information reading function is invoked to read the globally unique Media Access Control address or 64-bit unique device identifier string burned into the embedded non-volatile memory as the unique identifier of the hardware chip. The secure hash algorithm SHA256 (SHA256 hash function) in the underlying cryptographic service interface of the operating system is called to perform a hash operation on the obtained string byte stream to calculate a 256-bit fixed-length binary hash value. This 256-bit fixed-length binary hash value is then converted into a hexadecimal string as the hardware fingerprint. The operating system's file system mount command or the underlying file system virtual file system mount function is used. Following the key-value storage path specification, an external storage folder named with a hexadecimal string is mounted to the specified mount point in system memory as a read-only base configuration directory. The directory contains standard Extensible Markup Language (EXPLAIN) text or simplified data format files storing the parameter values ​​corresponding to the basic parameter keys of various network voice protocols, as well as long integer initial timestamp data.

[0029] The read function or underlying system file read operation reads and loads the protocol parameter dependency model, represented by a directed acyclic graph data structure, into the memory buffer pool as a reference table for configuration verification. The reference table records numerical mapping rules, such as linear scaling of specific speech coding buffer frame size parameters caused by changes in sampling rate parameters. The system incremental configuration directory in pre-configured flash sectors is read using memory-mapped file technology or a log read stream. Because the incremental configuration directory adopts a structure similar to a database write-ahead log (i.e., a transaction log mechanism), it stores log change entries that are appended sequentially each time configuration changes occur, containing the latest parameter keys and corresponding parameter values, along with a millisecond-level timestamp of the change.

[0030] Reference Figure 2The first processing step is the identifier acquisition stage, which means that the initial extracted hardware identifier data length is between 100 and 150 bits. The second processing step is the standard input stage, which means that after padding, a uniform length input sequence is formed, with a standard input data length of 256 bits. The third processing step is the hash output stage, which means that the hash value generated after hashing is also 256 bits long. The fourth processing step is the hardware fingerprint stage, which means that the final hardware fingerprint data obtained after truncation and conversion is 256 bits long. This shows that starting from the underlying hardware identifiers of different lengths, through padding and hashing, it is possible to uniformly convert them into a standardized fixed-length fingerprint sequence, which facilitates subsequent hashing operations and fingerprint comparison.

[0031] Furthermore, the configuration verification reference table is a set of logical rule dictionaries or dependency graphs generated in memory by the protocol parameter dependency model. It is used to check and automatically repair the consistency of relationships between parameters after the base configuration and incremental configuration are merged. For example, in the configuration scenario of a network voice communication device, suppose the user's incremental operation only changed the voice encoding type from G.711 to the high-compression G.729, but overlooked modifying the associated parameters, causing the network bandwidth requirement in the merged system configuration to remain at the base configuration's 64kbps. The system will compare the configuration verification reference table, not only identifying the invalid parameter combination of G.729 and 64kbps, but also automatically performing algebraic operations in the background to correct the bandwidth parameter to 8kbps based on the fixed mapping rules within the table—that is, if the encoding is G.729, the bandwidth mapping should be 8kbps.

[0032] In an optional embodiment, to obtain the unique identifier of the hardware chip, a hash operation is performed to generate a hardware fingerprint. Specifically, the hardware identifier is read from the read-only secure storage area of ​​the hardware chip; the hardware identifier is padded with a preset number of bits to reach the standard input sequence; the standard input sequence is input into a hash function for multiple iterative operations to generate a hash value; and the last preset number of bits of the hash value is truncated as the hardware fingerprint.

[0033] The factory-installed 96-bit or 128-bit hardware identifier is read from the read-only secure storage area (OTP) or eFuse of the hardware chip via low-level registers. If the hardware identifier is shorter than the preset standard length (e.g., 256 bits), standard padding algorithms such as PKCS#7 or ISO / IEC-7816-4 are used to pad the end with 0x00 or specific padding characters, ensuring the hardware identifier reaches a standard 256-bit input sequence. This 256-bit standard input sequence is then used as input, and a hash algorithm such as SHA-256 or SM3 is used for multiple iterations, such as 1000 or 5000 iterations in the PBKDF2 algorithm, to output a 256-bit hash value. Bitwise operations are used to truncate the 256-bit hash value to a preset number of bits at the end (e.g., a complete 256 bits or 32 bytes at the end), and these preset bits are then encoded in hexadecimal to generate a 64-character string, which serves as the hardware fingerprint of the hardware chip. This method processes potential patterns in the identifier through multiple iterations and truncation operations, improving the randomness and security of the fingerprint in subsequent directory indexing and encryption key generation scenarios.

[0034] In an optional embodiment, a read-only baseline configuration directory is mounted using a hardware fingerprint as an index. This directory records parameter keys, parameter values, and initial timestamps, and loads an associated protocol parameter dependency model containing numerical mapping relationships as a reference table for configuration verification. Specifically, string matching is performed using the hardware fingerprint to find the corresponding read-only baseline configuration directory; the read-only baseline configuration directory is invoked using a read-only mount command with tamper-proof attributes; nodes in the protocol parameter dependency model are parsed to construct a directed graph or dependency tree containing unidirectional associations and numerical mapping relationships between various protocol parameters, which serves as a reference table for configuration verification.

[0035] In the configuration storage system, such as a specific sector of Flash memory or a file system, a multi-level directory structure named after the hardware fingerprint is pre-established. Once the 64-character hardware fingerprint string is obtained, the operating system or file management system uses a string matching algorithm to traverse the root directory to find the corresponding target folder, for example, the path / config / base-6a8f... After locating the target directory, a mount command with kernel-level read-only permissions is executed, such as the `mount-oro,nosuid,noexec` command in Linux, to mount the read-only base configuration directory to the memory virtual file system. This protects the parameter keys in the memory virtual file system, such as SIP-PORT, parameter values, such as 5060, and the initial timestamp, such as the Unix timestamp 1672531200, from being tampered with by applications. Finally, the protocol parameter dependency model bound to the base configuration, such as a JSON or XML format model file, is loaded. The rule nodes in the model are parsed line by line using a DOM or SAX parser to extract the dependency constraints between source parameters, such as Voice-Codec, and target parameters, such as Bandwidth. A directed acyclic graph (DAG) or dependency tree structure object is then initialized in memory. In the dependency tree structure object, each node represents a protocol parameter key, directed edges represent unidirectional associations, and the weights or attributes on the edges store the specific numerical mapping relationships. For example, if Voice-Codec equals G729, then Bandwidth is mapped to 8kbps. This directed graph, once constructed, resides in memory and serves as a reference table for configuration set verification and faulty association correction.

[0036] In an optional embodiment, for loading a readable and writable incremental configuration directory, the incremental configuration directory uses a transaction log structure to record change items containing parameter keys, parameter values, and timestamps. Specifically, a separate log append space is created for external configuration change operations; configuration change instructions are decomposed into log records containing parameter keys, parameter values, and timestamps; and log records are stored sequentially in the incremental configuration directory using an append-only write mode, prohibiting overwriting or modifying historical records.

[0037] In the non-volatile storage area associated with the hardware chip, such as EEPROM or SPI-Flash, a separate sector of a preset size, such as 1MB or 2MB, is allocated as log append space for configuration change operations issued via external protocols such as WebUI, SNMP, or TR-069. When a configuration change command is received, the backend protocol conversion gateway parses the command, breaks it down, and formats it into a standardized transaction log structure. The transaction log structure uses a binary or structured text format, such as each record occupying 64 bytes, containing a 16-byte parameter key (e.g., RING-TONE), a 40-byte parameter value (e.g., tone-type-2), and an 8-byte double-precision Unix timestamp (e.g., 1684300000.123). During the data persistence phase, the generated log records are sequentially written to the incremental configuration directory as streaming data through the O-APPEND flag of the underlying file system or the page sequential write characteristic of the flash controller. Under the append-only write mechanism, the file system or driver layer shields erase or overwrite commands at the firmware level, allowing the write pointer to move unidirectionally forward. This results in multiple modifications to the same parameter key, such as SIP-PORT, generating multiple consecutive historical log records with different timestamps.

[0038] S2. Parse and merge the configuration and correct the associated parameters.

[0039] In an optional embodiment, the read-only baseline configuration directory and the incremental configuration directory are respectively parsed into a first set of configuration parameters and a second set of configuration parameters containing timestamps in memory; the second set of configuration parameters is merged into the first set of configuration parameters, and in case of conflict, the latest value is retained according to the timestamp to achieve an initial fusion set; the initial fusion set is verified using a configuration verification reference table, and the failed associated parameters are automatically corrected according to the numerical mapping relationship to generate a conflict-free configuration set.

[0040] Two hash table structures based on open addressing or chaining are initialized in the system process space to store configuration data. The basic configuration file in the read-only base configuration directory is parsed line-by-line or node-by-node using the Extensible Markup Language (EXPLAIN) parsing function from an open-source text parsing library. The extracted string format parameter keys, their corresponding parameter values, and initial timestamp fields are packaged into node objects and inserted into the first hash table instance, which is the first configuration parameter set. Log line text data in the incremental configuration directory is parsed sequentially using regular expressions or a specific delimiter splitting function, and key-value pair changes including timestamps are sequentially inserted or updated into the second hash table instance, which is the second configuration parameter set. Then, a hash table traversal algorithm is used to sequentially read all node data in the second hash table, i.e., the second configuration parameter set. A hash lookup algorithm is called in the first hash table, i.e., the first configuration parameter set, to find the corresponding parameter key node. If the corresponding parameter key node is not found, a node insertion function is called to add the new node from the second configuration parameter set to the hash table containing the first configuration parameter set. If the search finds that two sets contain conflicting parameter key nodes with the same name, the comparison operator is invoked to extract and compare the long integer timestamp values ​​of the first and second configuration parameter sets.

[0041] Since a larger long integer timestamp value indicates a more recent modification time, the tree node data overwrite function is called to retain and overwrite the parameter value and timestamp attribute with a larger timestamp, i.e., the latest time value. After all traversals and conflict resolution overwrites, the memory data structure of the first configuration parameter set is merged to reach the initial fusion set. A graph traversal algorithm based on breadth-first search or a topological sorting algorithm is executed, combined with the reference table in memory, i.e., the directed acyclic graph generated by the protocol parameter dependency model, to check the dependencies and constraints of all key-value data nodes in the initial fusion set. When the check finds that some independent parameters have been incrementally updated and the related parameters of the independent parameters have failed due to not satisfying the mapping dependency formula, a preset linkage correction subroutine is triggered to perform internal algebraic operations. According to the numerical mapping relationship, the failed related parameters are automatically corrected to the correct matching values ​​that conform to the mapping relationship. When all nodes pass the dependency check and there are no more isolated failed parameters, the verified hash table data is extracted and converted into a linear array space to generate a conflict-free configuration set.

[0042] In an optional embodiment, the read-only baseline configuration directory and the incremental configuration directory are respectively parsed into a first set of configuration parameters and a second set of configuration parameters containing timestamps in memory. Specifically, files in the read-only baseline configuration directory are read and converted into a first sequence of memory key-value pairs indexed by parameter keys and containing initial timestamps; log records in the incremental configuration directory are extracted and converted into a second sequence of memory key-value pairs containing parameter keys, the latest parameter values, and corresponding timestamps.

[0043] The system reads configuration files (such as ini or yaml files) from the mounted read-only baseline configuration directory via file I / O interface, and then uses a text parsing engine to scan them line by line. During parsing, memory is allocated, and a hash table object implemented using either chaining or open addressing is instantiated as the first set of configuration parameters. This hash table uses parameter keys, such as the hash value of DTMF-MODE, as its index. The hash table's Value structure encapsulates the original parameter value, such as RFC2833, and the initial timestamp variable, such as 1670000000 of type uint64-t, thus constructing the first memory key-value pair sequence in heap memory. The system then locates the incremental configuration directory and uses a two-pointer sliding streaming method to extract append log records one by one. Since the same parameter key may have multiple change histories in the log, another second memory dictionary structure based on hash mapping is instantiated as the second set of configuration parameters. When traversing and retrieving log records and inserting them into the second memory dictionary, an overwrite strategy is applied to the same parameter key. That is, if the key already exists, the timestamp of the currently retrieved record is compared with the timestamp of the cached record in the dictionary. If the timestamp of the new record is larger, the parameter value and timestamp in the dictionary are replaced. After the traversal is complete, the second memory key-value pair sequence will retain the latest parameter value and corresponding timestamp of each modified parameter key.

[0044] Reference Figure 3 The system presents a base timestamp representing the initial record, an incremental timestamp representing the configuration change, and the latest merged value of the concatenated data points. For a specific configuration parameter index, if only a base timestamp exists, the latest merged value is processed through the base timestamp. If the same configuration parameter index has both a base timestamp and an incremental timestamp, and the incremental timestamp is above the base timestamp (indicating a larger relative time signature), the latest merged value is converted to concatenating the upper-ranking incremental timestamp. This demonstrates that when encountering a conflict with the same parameter key, the system strictly adheres to the timestamp priority rule. By comparing the timestamp values, it successfully filters and retains the latest change record with a larger relative time signature, thus achieving effective coverage and merging of configuration parameters.

[0045] In an optional embodiment, when merging the second set of configuration parameters into the first set of configuration parameters, in case of conflict, the latest value is retained based on the timestamp to achieve the initial merge set. Specifically, the second set of configuration parameters is traversed, and a query is performed in the first set of configuration parameters to see if a parameter key with the same name exists. If a parameter key with the same name exists, the change time records of the parameter key with the same name are compared to determine whether the timestamp of the change item in the second set of configuration parameters is later than the record in the first set of configuration parameters. If the timestamp of the change item in the second set of configuration parameters is later than the record in the first set of configuration parameters, the parameter value in the second set of configuration parameters replaces the original value in the first set of configuration parameters, completing the overwriting and merging of configuration sets.

[0046] The second set of configuration parameters resident in memory is linearly traversed using an iterator. For each incremental parameter key pointed to by the iterator, such as REG-EXPIRE, a query operation with a time complexity of O(1) is performed in the first set of configuration parameters using the hash value of the incremental parameter key. If the query result is a hash miss, it means that the incremental parameter key is a new configuration, and the key-value pair node and the corresponding timestamp are inserted into the first set of configuration parameters; if the hash hits, that is, a parameter key with the same name is detected, the conflict handling logic is triggered, the initial timestamp variable T1 corresponding to the parameter key with the same name in the base hash table is extracted, and the value is compared with the change timestamp variable T2 corresponding to the parameter key with the same name in the incremental dictionary. During the comparison phase, an unsigned 64-bit integer subtraction operation is performed to determine the timing. When T2>T1, for example, T2=1685000000, T1=1670000000, that is, when it is determined that the change time of the incremental configuration is later than the base configuration record, the memory overwrite function is called. Using the latest parameter value from the second configuration parameter set, such as 3600, overwrite the original parameter value of the corresponding node in the first configuration parameter set, such as 1800, and simultaneously update the timestamp of the corresponding node to T2. After the entire traversal and conditional coverage process is completed, the memory space of the original first configuration parameter set will present a key-value pair network that integrates the baseline configuration and incremental configuration; the memory state is the initial fusion set.

[0047] S3. Encrypt, verify, and load the configuration image.

[0048] In an optional embodiment, the conflict-free configuration set is serialized into a binary image file. The binary image file is encrypted using a hardware fingerprint as the key. A message authentication code is calculated from the encrypted binary image file using the hardware fingerprint to generate a bound verification code. The encrypted binary image file and the verification code are loaded into a designated memory of the hardware chip. The built-in logic of the hardware chip reproduces the hardware fingerprint using the unique identifier of the hardware chip. The message authentication code is recalculated from the encrypted binary image file using the hardware fingerprint. The recalculated message authentication code is compared with the loaded verification code. After successful verification, the encrypted binary image file is decrypted using the hardware fingerprint and the configuration is used.

[0049] The core encoding function of the Google Protocol Buffer open-source binary data serialization library is invoked to sequentially encapsulate the collision-free configuration set parameters in the linear array space of memory using cross-platform compact binary encoding, resulting in a complete continuous binary stream structure as the serialized output binary image file. The encryption function of the system's AES-256-CTR open-source encryption / decryption library is invoked, using the 256-bit bitstream corresponding to the hexadecimal hardware fingerprint as the AES algorithm symmetric key. Combined with the initial vector generated by the pseudo-random number generation function, a pseudo-random byte sequence is generated and a byte-by-byte bitwise XOR operation is performed on the serialized output binary image file byte stream, outputting the encrypted binary image file to be parsed. The calculation function of the HMAC algorithm open-source library is invoked, using the hexadecimal hardware fingerprint bitstream as the key material, to perform a two-stage cross-hashing operation of the inner and outer hash functions on the complete byte array of the encrypted binary image file, obtaining a 256-bit secure hash value as the verification code data for binding the file's authenticity and integrity.

[0050] The encrypted binary image file and subsequent verification code are uniformly mapped and written to a fixed starting address segment of the hardware chip's internal random access memory via UART hardware communication bus instructions or the memory copy interface function of the DMA controller hardware driver, thus completing data loading. The embedded microcontroller kernel of the hardware chip, as built-in logic, calls the underlying assembly driver module or internal firmware to access non-volatile read-only memory to read unique identifiers such as MAC address and device serial number. Then, through the microcontroller's integrated cryptographic hardware acceleration engine or locally embedded secure hash function, the same hardware fingerprint hexadecimal bitstream is reproduced.

[0051] The microcontroller reads the encrypted binary image file from designated memory. Relying on the HMAC calculation module within the cryptographic hardware acceleration engine and combining it with the reproduced hardware fingerprint bitstream, it recalculates the message authentication code in its internal cache following the same two-stage computation process. It then calls a standard C language memory block byte-by-byte comparison function to perform a bit-by-bit equality comparison between the recalculated message authentication code and the loaded checksum, completing the anti-tampering authentication verification. If the comparison results match, the data is determined not to have been tampered with. The microcontroller's AES decoding module is then invoked, using the same initialization vector and the reproduced hardware fingerprint as the decryption key to perform a CTR-mode reverse XOR decryption on the encrypted binary image file in memory, restoring the original conflict-free configuration set data stream. The voice protocol communication stack software then parses and assigns values ​​to each internal module and communication application environment based on the structure offset field constant, completing the configuration deployment and official activation.

[0052] In an optional embodiment, the conflict-free configuration set is serialized into a binary image file. The binary image file is encrypted using a hardware fingerprint as the key. A message authentication code is calculated from the encrypted binary image file using the hardware fingerprint to generate a bound verification code. The encrypted binary image file and the verification code are loaded into a designated memory of the hardware chip. The built-in logic of the hardware chip reproduces the hardware fingerprint using the unique identifier of the hardware chip. The message authentication code is recalculated from the encrypted binary image file using the hardware fingerprint. The recalculated message authentication code is compared with the loaded verification code. After successful verification, the encrypted binary image file is decrypted using the hardware fingerprint and the configuration is used. Specifically, the conflict-free configuration set is converted into a continuous binary data stream; a pseudo-random sequence generated by the hardware fingerprint is used to perform an XOR operation on the binary data stream to generate an encrypted binary image file; the hardware fingerprint is used as a key to perform a message authentication code operation on the encrypted binary image file, and the generated message authentication code is extracted as a verification code; after the hardware chip loads the encrypted binary image file and the verification code, the built-in logic extracts a unique identifier to calculate the hardware fingerprint, and recalculates the message authentication code on the loaded encrypted binary image file in combination with the hardware fingerprint. After comparing the recalculated message authentication code with the loaded verification code, the hardware fingerprint is used to generate a corresponding pseudo-random sequence, and the pseudo-random sequence is used to perform an inverse XOR operation to decrypt the encrypted binary image file and use the configuration.

[0053] Using serialization protocols such as Protocol Buffers or Flat Buffers, the conflict-free configuration set, verified and corrected by the protocol parameter dependency model, is packaged and compressed into a byte-aligned continuous binary data stream, such as a 12KB BIN file. The previously generated 32-byte hardware fingerprint is input to a pseudo-random number generator, such as DRBG based on AES-CTR mode, to generate a pseudo-random byte sequence of the same length as the binary data stream. The CPU's vector operation unit, such as the SIMD instruction set, performs a byte-by-byte XOR operation on the binary data stream and the pseudo-random sequence, outputting an encrypted binary image file. To ensure data integrity, the previously generated 32-byte hardware fingerprint is used as the symmetric key for the HMAC-SHA256 algorithm. A hash message authentication operation is performed on the encrypted binary data stream, and the generated 256-bit message digest is extracted as the checksum. The encrypted image and checksum are loaded into the hardware chip via a DMA channel, such as a pre-allocated SRAM memory segment in the baseband processing chip. The hardware chip's built-in BootROM or security subsystem logic is activated during the startup phase, reading the hardened identifier and running hash iterations to regenerate the hardware fingerprint. The hardware chip's built-in BootROM or security subsystem logic uses the newly derived hardware fingerprint to re-run the HMAC-SHA256 operation on the encrypted image in SRAM to obtain a new MAC value, and performs a constant-time comparison to prevent side-channel attacks. After the new MAC value matches the externally loaded checksum, the chip logic uses the newly derived hardware fingerprint to drive a pseudo-random generator to generate a pseudo-random sequence, performs an inverse XOR operation to restore the plaintext binary configuration stream, and deserializes it into a register for use by the protocol stack.

[0054] The experimental setup consisted of 100 microcontroller-based IoT gateway devices as the test platform, evenly divided into a basic control group, an ablation experiment group, and a complete solution group. The basic control group employed a traditional single plaintext configuration overwrite mechanism. The ablation experiment group used an append-only incremental transaction log and timestamp merging mechanism, but did not include hardware fingerprint encryption and message authentication code verification. The complete solution group employed all mechanisms of this invention, including incremental configuration log merging, hardware fingerprint XOR encryption, and message authentication code verification.

[0055] In the test environment, each group of devices underwent 1000 random power outages and restarts accompanied by configuration distribution operations, while simultaneously injecting malicious configuration modifications into the storage area. In the basic control group, 112 instances of configuration file corruption prevented device startup, and the success rate of malicious configuration modifications was 100%, with an average configuration loading time of 15ms. In the ablation experiment group, 0 instances of configuration corruption occurred, but the success rate of malicious configuration modifications remained 100%, with configuration parsing and merging taking 22ms. In the complete solution group, 0 instances of configuration corruption occurred, and the success rate of malicious configuration modifications was 0%. All modifications were intercepted during the loading phase, with a total time of 28ms.

[0056] Reference Figure 4 Regarding the number of corruption attempts and the success rate of tampering, the control group experienced over 100 corruption attempts and a 100% success rate, indicating that the traditional mechanism has weak resistance to power outages and lacks tamper protection. The ablation group saw a reduction to zero corruption attempts, but the tampering success rate remained at 100%, demonstrating that while the transaction log appending mechanism prevented file corruption, it failed to intercept unauthorized configuration modifications. The complete solution group saw both the number of corruption attempts and the success rate of tampering drop to zero, indicating that the introduction of hardware fingerprint encryption and verification successfully intercepted all malicious modifications to the storage area, ensuring configuration security. In terms of loading time, the control group, ablation group, and complete solution group showed an increasing trend in loading time, indicating that the complete solution group, while maintaining high system reliability, sacrificed only a small amount of loading time to ensure the device's tamper protection capabilities, achieving optimal system security defense and verifying its dual advantages in reliability and tamper protection.

[0057] This invention also discloses a hardware chip-based telephone protocol converter configuration system, including a processor and a memory. The memory stores computer program instructions, which, when executed by the processor, implement the hardware chip-based telephone protocol converter configuration method according to this invention.

[0058] The system also includes other components well known to those skilled in the art, such as communication buses and communication interfaces, the settings and functions of which are known in the art and will not be described in detail here.

[0059] It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept, and these all fall within the scope of protection of this invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A method for configuring a telephone protocol converter based on a hardware chip, characterized in that, include: S1. Obtain the unique identifier of the hardware chip and perform a hash operation to generate a hardware fingerprint; A read-only baseline configuration directory is mounted using a hardware fingerprint as an index. This directory records parameter keys, parameter values, and initial timestamps. A protocol parameter dependency model containing numerical mapping relationships is loaded as a reference table. An incremental configuration directory that supports reading and writing is loaded, which uses a transaction log structure to record changes containing parameter keys, parameter values, and timestamps. S2. Parse the read-only baseline configuration directory and the incremental configuration directory into first and second sets of configuration parameters containing timestamps in memory, respectively. The second set of configuration parameters is merged into the first set of configuration parameters. In case of conflict, the latest value is retained according to the timestamp to obtain the initial fusion set. The initial fusion set is verified using a reference table, and the failed associated parameters are automatically corrected based on the numerical mapping relationship to generate a verified configuration set. S3. Serialize the verified configuration set into a binary image file, encrypt it with the hardware fingerprint as the key, and calculate the message authentication code to generate a verification code in combination with the hardware fingerprint. The encrypted binary image file and verification code are loaded into the hardware chip's memory. The hardware chip reproduces the hardware fingerprint using a unique identifier and recalculates the message authentication code. After the verification code is compared and passed, the code is decrypted and configured.

2. The configuration method for a hardware chip-based telephone protocol converter according to claim 1, characterized in that, Obtaining a unique identifier for a hardware chip and performing a hash operation to generate a hardware fingerprint includes: reading the hardware identifier from the read-only secure storage area of ​​the hardware chip; adjusting the hardware identifier by a preset number of bits to achieve a standard input sequence; inputting the standard input sequence into a hash function for multiple iterative operations to generate a hash value; and truncating the last preset number of bits of the hash value as the hardware fingerprint.

3. The configuration method for a hardware chip-based telephone protocol converter according to claim 1, characterized in that, Mounting a read-only baseline configuration directory using a hardware fingerprint as an index, and loading a protocol parameter dependency model containing numerical mapping relationships as a reference table, includes: performing string matching based on the hardware fingerprint to find the corresponding read-only baseline configuration directory; calling the read-only baseline configuration directory through a read-only mount command with anti-tampering attributes; parsing the nodes in the protocol parameter dependency model, and constructing a directed acyclic graph data structure containing unidirectional associations and numerical mapping relationships between each protocol parameter as a reference table for configuration verification.

4. The configuration method for a hardware chip-based telephone protocol converter according to claim 1, characterized in that, Loading an incremental configuration directory that supports reading and writing includes: creating an independent log append space for external configuration change operations; decomposing configuration change instructions into log records containing the parameter key, the parameter value, and a timestamp; and storing the log records sequentially into the incremental configuration directory using an append-only write mode, retaining all historical records.

5. The configuration method for a hardware chip-based telephone protocol converter according to claim 1, characterized in that, The read-only baseline configuration directory and the incremental configuration directory are respectively parsed into first and second sets of configuration parameters containing timestamps in memory, including: reading files in the read-only baseline configuration directory and converting the files into a first memory key-value pair sequence indexed by parameter keys and containing initial timestamps; extracting log records in the incremental configuration directory and converting the log records into a second memory key-value pair sequence containing parameter keys, latest parameter values ​​and corresponding timestamps.

6. The hardware chip-based telephone protocol converter configuration method according to any one of claims 1 to 5, characterized in that, The second set of configuration parameters is merged into the first set of configuration parameters. In case of conflict, the latest value is retained according to the timestamp to obtain the initial fusion set. This includes: traversing the second set of configuration parameters and checking whether there is a parameter key with the same name in the first set of configuration parameters; if there is a parameter key with the same name, comparing the change time records and determining that the timestamp of the change item in the second set of configuration parameters is later than the record in the first set of configuration parameters; based on the later determination result, replacing the original value in the first set of configuration parameters with the parameter value in the second set of configuration parameters.

7. The configuration method for a hardware chip-based telephone protocol converter according to claim 1, characterized in that, The process of serializing a verified configuration set into a binary image file and encrypting it using a hardware fingerprint as a key includes: converting the verified configuration set into a continuous binary data stream; performing an XOR operation on the binary data stream using a pseudo-random sequence generated by the hardware fingerprint to generate an encrypted binary image file; and performing a message authentication code operation on the encrypted binary image file using the hardware fingerprint as a key, and extracting the generated message authentication code as the verification code.

8. The configuration method for a hardware chip-based telephone protocol converter according to claim 1, characterized in that, The initial fusion set is verified using a reference table, and the failed associated parameters are automatically corrected according to the numerical mapping relationship. This includes: extracting independent parameters and associated parameters related to the independent parameters from the initial fusion set; after the independent parameters are updated, verifying that the associated parameters conform to the numerical mapping relationship using the reference table; when it is determined that the parameters have deviated from the numerical mapping relationship, obtaining a matching value through algebraic operations based on the numerical mapping relationship, and modifying the value of the associated parameter to the matching value.

9. The configuration method for a hardware chip-based telephone protocol converter according to claim 1, characterized in that, The hardware chip reproduces the hardware fingerprint using a unique identifier and recalculates the message authentication code. After the comparison with the verification code is successful, the configuration is decrypted and used. This includes: the hardware chip activates its built-in logic to extract the underlying fixed identifier and re-runs the hash iteration to obtain the reproduced hardware fingerprint; the reproduced hardware fingerprint is used to perform a hash message authentication operation on the encrypted binary image file to obtain the recalculated authentication code; when the recalculated authentication code matches the verification code, the plaintext configuration stream is restored through symmetric encryption inverse operation and provided to the protocol stack for invocation.

10. A hardware chip-based telephone protocol converter configuration system, characterized in that, include: A processor and a memory, the memory storing computer program instructions that, when executed by the processor, implement the hardware chip-based telephone protocol converter configuration method according to any one of claims 1-9.

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