rsa

  1. nwhitfield

    iOS Question RSA support in B4i

    Having just implemented some stuff using RSA encryption and signing in my back end API, and in a B4A app that uses it, I'm hoping to add similar to the iOS app. However, on looking, it seems that RSA support on B4i is rather more limited. The main support seems to be the iRSA library, but that...
  2. carlos7000

    Android Question Encrypt decrypt using RSA

    Hello everyone I am trying to create a simple application that allows to send and receive messages in a secure way, using rsa or another similar system. I wrote this little code to see if it was possible to create a pair of keys (one public and one private), save them and use them again later...
  3. KMatle

    B4J Tutorial [B4x] RSA sign & verify messages (extra: with corresponding php code)

    This little tutorial is about signing and verifying data you send/receive between apps (= all "programs", even websites). You can use it in B4A without a change (I don't know how B4i works, but I assume there are similar libs). You should know how RSA works. If not, take a Google search and you...
  4. KMatle

    B4R Tutorial Using RSA on a ESP32 via Inline C

    Here's nother example how to use RSA on a ESP32 based on this documentation: https://tls.mbed.org/kb/how-to/encrypt-and-decrypt-with-rsa Notes: - If the filesystem does not work, you need to format it with fs.format once. - I've just copied the Public and Private Key from another app - Both...
  5. Alexander Stolte

    Android Code Snippet [B4X] RSA Encrypt and Decrypt

    Hey, i build a auth method for my app to protect my API and one of this step is to signed requests to the api to ensure that every request comes from my app. RSA is the best method for that, because this is not a hash, so that the same input is ever the same output. The API knows the Private...
  6. Alexander Stolte

    Android Question RSA Encryption allways the same output

    Hey, why is this code working on B4J, but not on B4A? Private Sub EncryptRSAWithPublicKey(Text As String,PublicKey As String) As String Dim su As StringUtils Dim pubkey() As Byte = su.DecodeBase64(PublicKey) Dim Enc As Cipher Enc.Initialize("RSA") Dim kpg As...
  7. KMatle

    Wish ESP32: AES & RSA encryption (C code attached)

    I've found examples in C but I'm not experienced with inline C. Could someone adapt these examples to usable inline code? RSA https://github.com/espressif/arduino-esp32/blob/master/tools/sdk/include/mbedtls/mbedtls/rsa.h AES...
  8. KMatle

    B4J Tutorial [B4x] RSA example (asyncstreams)

    - Changed to B4x as the subs can be used in B4A, too - "Send File" added (new Button to send a file to the other client) This tutorial is based on Erel's Asyncstreams example: https://www.b4x.com/android/forum/threads/b4x-network-asyncstreams-b4xserializator.72149/ RSA basics...
  9. alimanam3386

    B4A Library Manam RSA

    Hi guys I recently created this class for a particular project, you can use it , you can google the RSA algorithm for more information. and merry Christmas :)
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