Sharing and saving RSA is a public key on a java server and vice versa

Question

My requirements:

Requirement 1: Share the Java server.

Steps:

• Creating public keys in an iOS application.
• Store the generated keys in the keychain.
• Send the generated public key to the java server.
• The Java server must be able to store the shared public key in the database.

Requirement 2: Keep public key sent using java server.

Steps:

• The Java server sends the public key of another user.
• Process data sent by the java server and generating a public key from it.
• Store the generated key in the key chain, which can subsequently be obtained to encrypt the transmitted message.

1-2 1, , SecKeyWrapper ( CommonCrypto):

- (void)generateKeyPair:(NSUInteger)keySize

1: , java-?

getPublicKeyBits , NSData, - googling , DER.

2: NSData , , , ByteBuffer, , android, ?

3: ?

, :

№1:

Android End

• Android ( openssl wrapper)

iOS End

• ios, , : qaru.site/questions/431052/...
• NSData, NSUTF8StringEncoding
• - wrapSymmetricKey: keyRef: , SecKeyWrapper ( CryptoExercise) 1 , 2 .
• NSData ( ), base64encoded string, Android.

Android End

7. base64encoded,

:

- RSA

№ 2: ( , - https://github.com/superwills/iOSRSAPublicKeyEncryption, iOS , , )

• openssl, URL: qaru.site/questions/200832/...

iOS End

2. , URL

3. :

   SecKeyWrapper * secKeyWrapper = [SecKeyWrapper sharedWrapper]; SecKeyRef PublicKey = [secKeyWrapper getPublicKeyRefFromDerCertificate: kCertificatePath]; NSData * dataToBeEncrypted = [kStringToBeEncrypted dataUsingEncoding: NSUTF8StringEncoding]; NSData * encryptedText = [secKeyWrapper wrapSymmetricKey: dataToBeEncrypted keyRef: receivedPublicKey];

4. NSData base64encoded string

5. , :

   | openssl rsautl -decrypt -inkey rsaPrivate.pem

:

- rsa: RSA_EAY_PRIVATE_DECRYPT: , Len:/SourceCache/OpenSSL098/OpenSSL098-47.1/src/crypto/rsa/rsa_eay.c

?

Answer 1

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