On 4 Nov 2008, at 15:59, Jacopo Mangiavacchi wrote:
I need to export a public key generated with the SecKeyGeneratePair
API and send it to a WebServices (written in PHP) that using the
OpenSSL API must encrypt something using this key and return back
the ciphered value to the cocoa client.
In order to pass the public key NSData buffer I've tried to encode
that in Base64 format and to pass it as a standard RSA pubkey string
because I know that OpenSSL can accept a string like that.
...
Am I missing something ?
The base64 encoded key block for OpenSSL needs to be a DER encoded
PKCS#1 public key block, not just the raw key bytes. Track down the
SecKeychainItemExport function (in SecImportExport.h) and call it with
the kSecFormatOpenSSL parameter to get the data you need, then base64
encode the result.
Cheers,
Nicko
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