Skip to content

Instantly share code, notes, and snippets.

Embed
What would you like to do?
RSA-SHA1 signing with a PKCS#12 private key
//
// RSASHA1.swift
//
// Copyright (c) 2015 Neil Cowburn. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
import Security
public typealias RSASigningResult = (signedData: NSData?, error: NSError?)
public func rsa_sha1(data plainData: NSData, #privateKey: SecKey!) -> RSASigningResult {
var digest = NSMutableData(length: Int(CC_SHA1_DIGEST_LENGTH))!
// Hash the data
CC_SHA1(plainData.bytes, CC_LONG(plainData.length), UnsafeMutablePointer<UInt8>(digest.mutableBytes))
// Then sign it
var signedData = NSMutableData(length: SecKeyGetBlockSize(privateKey))!
var signedDataLength = signedData.length
let err: OSStatus = SecKeyRawSign(privateKey,
SecPadding(kSecPaddingPKCS1SHA1),
UnsafePointer<UInt8>(digest.bytes),
digest.length,
UnsafeMutablePointer<UInt8>(signedData.mutableBytes),
&signedDataLength)
if err == errSecSuccess {
return (signedData: signedData, error: nil)
}
return (signedData: nil, error: NSError(domain: NSOSStatusErrorDomain, code: Int(err), userInfo: nil))
}
public func PKCS12ReadKey(path keyFilePath: String, #password: String?) -> SecKey? {
let p12KeyFileContent = NSData(contentsOfFile: keyFilePath, options: .DataReadingMappedAlways, error: nil)
if (p12KeyFileContent == nil) {
NSLog("Cannot read PKCS12 file from \(keyFilePath)")
return nil
}
let options = [String(kSecImportExportPassphrase.takeUnretainedValue()):password ?? ""]
var citems: Unmanaged<CFArray>? = nil
let resultPKCS12Import = withUnsafeMutablePointer(&citems) { citemsPtr in
SecPKCS12Import(p12KeyFileContent, options, citemsPtr)
}
if (resultPKCS12Import != errSecSuccess) {
return nil
}
let items = citems!.takeRetainedValue() as NSArray
let myIdentityAndTrust = items.objectAtIndex(0) as! NSDictionary
let identityKey = String(kSecImportItemIdentity.takeUnretainedValue())
let identity = myIdentityAndTrust[identityKey] as! SecIdentity
let trustKey = String(kSecImportItemTrust.takeUnretainedValue())
let trust = myIdentityAndTrust[trustKey] as! SecTrust
// MARK - Private Key
var privateKey: Unmanaged<SecKey>? = nil
let resultCopyPrivateKey = withUnsafeMutablePointer(&privateKey) {
privateKeyPtr in
SecIdentityCopyPrivateKey(identity, privateKeyPtr)
}
if (resultCopyPrivateKey != errSecSuccess) {
NSLog("SecIdentityCopyPrivateKey fail")
return nil
}
return privateKey!.takeRetainedValue()
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
You can’t perform that action at this time.