Key Generation Process For Aes Algorithm

Nfs shift serial key generator. AES was designed to be efficient in both hardware and software, and supports a block length of 128 bits and key lengths of 128, 192, and 256 bits. How secure is AES encryption algorithm? AES encryption is used by U.S. For securing sensitive but unclassified material, so we can say it is enough secure. Cs go key generator 2018 free. Tested on differed operational modes of AES. The AES algorithm is faster as compared to other algorithms such as DES, 2DES and 3DES because encryption and decryption are done in nonlinear manner and less number of round. We propose a byte oriented 512.

Introduction

Recently we had a requirement in our organization to implement encryption for all data transmission happening from SAP to external systems to have an additional layer of security. The requirement was to AES256 encrypt and Base64 Encode the information shared between the systems.The encryption/decryption was done with a common key which gets generated in SAP and shared through automated email from the system.

SAP Class/Function Modules used for the process:

  • CL_SEC_SXML_WRITER is used to implement the logic for generation of AES key and encryption/decryption of information.
  • SCMS_BASE64_<EN/DE>CODE_STR FM is being used for Base64 Encoding/Decoding the information.

High Level Process Flow

Following are the steps and sample code we have used for encryption/decryption.

Generate Encryption Key

Online

We use following logic to generate Key for encryption which is stored in a table and then shared with external systems.

Decryption

External System sends AES encrypted and Base64 encoded data and in SAP we used following logic to decrypt the text.

Encryption:

SAP processes the information and sends encrypted response back using following logic:

Sample Output:

Conclusion

The blog post provides information on how to encrypt and decrypt information in SAP and how you can plan the integration with external systems. The sample code here works for AES256/CBC/PKCS5 Padding algorithm, but CL_SEC_SXML_WRITER class has other AES encryption algorithms as well.

Please note along with the encryption key, we also need to share the IV key which is 16bit hexadecimal string (‘0000000000000000’).

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How Does Aes Algorithm Work

Hopefully this blog post will help in implementing similar requirements where we need to send encrypted information between multiple systems.