btnguyen2k
commented
4 years ago Hi @vdharmarajan, Putty keys need to be converted to OpenSSH format first. I dont have Windows but google says this
Open your private key in PuTTYGen Top menu “Conversions”->”Export OpenSSH key”. Save the new OpenSSH key when prompted."
Cheers, Thanh Nguyen
Thank you for sharing your work.
FYI, I have been trying to load external generated key (public or private) into iOS keychain without any success for the past several weeks. I came across your work.
I was trying to load a private key generated in another server into iOS. I get a Nil value. I have been debugging the code with "Print" commands throughout AddRSAPrivateKey functions, both public and private. The function executes all the way to the end, but while returning, I get a Nil.
The Nil comes from
@discardableResult private static func addRSAPrivateKey(_ privkey: Data, tagName: String) throws -> SecKey? { } function.
Background: After several failed attempts to load iOS generated public key to our remote Windows server, the Windows admin generated a key pair in server using puTTYYGen. He added the public key for my SSH user name and sent the key pair to me to add to iOS keychain. I exported the private key in Windows with puTTYgen, covered to base64 encoding and used it in your RSAUtils as a key string with a tag.
I came across several posts about how tricky it is to load an external key into keychain. If I am not mistaken, your code tries to deal with key header issues very similar to Objective C code done at http://blog.flirble.org/2011/01/05/rsa-public-key-openssl-ios/.
Your help is greatly appreciated.
Thanks