Document management system created by Assas IT solutions to manage

files via many features and methods:

File Sharding by two ways:

              Date

              Serial

Document digital signature.

Verify signature by two ways.

                File Id

                Signature

Encrypt Files by AES Algorithm.

Decrypt Files by AES Algorithm.

Generate AES key to use it at encrypt and decrypt.

Generate Private Key to use it at create digital signature.

Generate Public key to use it at Verify signature.
Resize Images When download it
Get document from Http Request

Module consist from 4 sub modules: -

Assas_DMS_CS -> Core layer module has database, crud function and service actions for tables.

Assas_DMS_BL -> business layer module has all business logic at service action to use.

Assas_DMS_Timer -> contain timers for fragment and purging.

Assas_DMS_Api -> consist from many APIS to do application Job.

Service Actions: -

File: -

FileCreate

Use to create file and return file Id.

Create_file server action takes for input parameters (File_content, File_name, File_Type, IsTemp), save it and return File_Id to use at any other features.

FileDelete

Use to Delete file with specific Id.

Delete_File Server Action take file_Id and delete it from Database.

GetFile

Use to Get file with specific Id.

Get_File Server Action take file_Id and return it from Database.

GetFiles

Use to Get list of files with list of Ids.

Get_Files Server Action take list of file Ids and return with list of files from Database.

Temp: -

UpdateTempToRegular

Use to Update File list from temp to Current file location.

AES: -

AESNewKey

Use to Generat New AES key to use it at encrypt.

AESEncrypt

Encrypt files used AES algorithm.

Takes 5 input parameters (InFileContent, InFileName, InFileType, IsTemp, AESKey) and assign it to AES_EncryptionAction which return FileId after encrypt it and save in database.

AES_EncryptionAction

Encrypt file using AES algorithm by sequence of steps: -

The user upload file.

Check if the file content is null.

If the file content is null, raises a UserException.

If the file content is not null, converts it to Base64.

Encrypt the Base64-encoded file content using AES encryption.

Convert the encrypted file content back to binary.

Create a new file with the encrypted file content.

Return New File Id.

AESDecrypt

Decrypt files used AES algorithm

Takes 2 input parameters (InFileId, Key) and assign it to AES_DecryptAction which return 3 parameters (InFileContent, InFileType, InFileName).

AES_DecryptionAction

Decrypt file using AES algorithm by sequence of steps: -

Get binary file by file Id.

Convert the file content to Base64.

Decrypt file by AES key.

Convert the Base64-file contents to the text file.

Assign all output.

RSA: -

GetRSAEncryptPrivateKey

Generate a new Private RSA key.

GetRSAPublicKeyByPrivateKey

Extract the public key from a private key.

File Signature: -

SignFile

Create Digital signature.

Takes 5 input parameters (InFileContent, InFileName, InFileType, IsTemp, PrivateKey) and assign it to Create_NewSignature which return 2 parameters (FileId, Signature) after Create it and save in database.

Create_NewSignature

Create signature using RSA algorithm by sequence of steps: -

Check on document if it empty or not.

Convert file from binary to text.

Create a hash of the digital document.

Encrypt the hash using their private key.

Append the encrypted hash to the digital document as a signature.

Assign output.

VerifyById

Verify Signature by signature Id.

Takes 3 input parameters (InFileContent, InFileId, PublicKey) and assign it to Verify_SignatureById which return Is Valid or not.

  a. Verify_SignaturebyId

Verify signature using RSA algorithm by Id by steps: -

Get file content by signature Id.

Convert file type from binary to text.

Verify signature throw public key and RSA algorithm

Return if signature valid or not.

VerifyBySignature

          Verify Signature by old signature.

Takes 3 input parameters (InFileContent, InSignature, PublicKey) and assign it to Verify_BySignature which return Is Valid or not.

a. Verify_bySignature

Verify signature using RSA algorithm by Signature by steps: -

Convert file type from binary to text.

Verify signature throw public key and RSA algorithm

Return if signature valid or not.

Rest API: -

AESEncrypt

          Encrypt File by AES algorithm by take structure of encrypt file information as input parameter and return file id.

AESDecrypt

Decrypt File by AES algorithm by take 2 Input parameters (FileId, Key) and return structure of file information.

GenerateNewAESKey

                    Generate a new AES key to use it at encrypt and decrypt methods.

GeneratPrivateKey

          Generate a new RSA private key to use at create signature.

GeneratePublicKey

          Generate a new RSA public key to use at verify signature.

CreateSignarture

          Create Digital Signature and store it in database, take structure of signature needed data and return signature Id and Signature.

VerifySignatureBySignature

          Verify signature by sending signature and new file, take (publickey, Signature, FileContent) as input parameters and return Is valid or not.

VerifySignatureById

          Verify signature by sending signature Id and new file, take (publickey, FileId, FileContent) as input parameters and return Is valid or not.

Create

          Upload the content wrote in the component by take File structure which held file data and return (CreateResponce) structure which consist from (Id, URL).

Download

Download the content wrote in the component by take GUID as input parameter and return file content.

DownloadResizedImage

Download The Content Wrote in The Component by take 3 parameters (GUID, width, height) as input parameters and return file content.

UpdateTempFilesToRegular

Update Temp files to Regular files by take file list as input parameter.

UploadFromHTTPRequest

Upload the content From HTTP Request by take IsTemp as an input parameter and return content.