Alamofire without evaluation and with sending client certificate - ios

Question

Hello i am currently going crazy with alamofire :).
What I'm trying to do is to disable evaluation because server has no valid SSL certificate but I have to connect by https and I have to send a x509 certificate made on IOS device by OpenSSL
I am currently using alamofire 4 and I was trying to do:
open class CertTrustPolicyManager: ServerTrustPolicyManager {
open override func serverTrustPolicy(forHost host: String) -> ServerTrustPolicy? {
let policy = ServerTrustPolicy.disableEvaluation;
// let policy = ServerTrustPolicy.pinCertificates(certificates: [certificateToPin], validateCertificateChain: true, validateHost: false);
// var policy = ServerTrustPolicy.pinCertificates(certificates: [certificateToPin], validateCertificateChain: false, validateHost: false);
return policy
}
let trustPolicies = CertTrustPolicyManager(policies: [:])
let alamofireManager:SessionManager = Alamofire.SessionManager(configuration: configuration, delegate: SessionDelegate(), serverTrustPolicyManager: trustPolicies)
also trying
var serverTrustPolicy:[String: ServerTrustPolicy] = [
Router.baseURLString : .pinCertificates(
certificates: [certificateToPin],
validateCertificateChain: false,
validateHost: false)
]
let alamofireManager:SessionManager = Alamofire.SessionManager(configuration: configuration, delegate: SessionDelegate(), serverTrustPolicyManager: ServerTrustPolicyManager(policies: serverTrustPolicy))
First approach with
let policy = ServerTrustPolicy.disableEvaluation;
gave me successful connection but then I'm unable to pin certificate ( or I don't know how)
second approach produces and god knows whats next :)
2017-05-10 08:37:13.801894+0200 App[10117:1120893] [] nw_coretls_callback_handshake_message_block_invoke_3 tls_handshake_continue: [-9812]
2017-05-10 08:37:13.802 App[10117:1120907] NSURLSession/NSURLConnection HTTP load failed (kCFStreamErrorDomainSSL, -9813)
I don't even know if I'm sending it correctly.
any tips?
EDIT this made my connection good but I'm not sending certificate
alamofireManager.delegate.sessionDidReceiveChallenge = { session, challenge in
var disposition: URLSession.AuthChallengeDisposition = .performDefaultHandling
var credential: URLCredential?
if challenge.protectionSpace.authenticationMethod == NSURLAuthenticationMethodServerTrust {
disposition = URLSession.AuthChallengeDisposition.useCredential
credential = URLCredential(trust: challenge.protectionSpace.serverTrust!)
} else {
if challenge.previousFailureCount > 0 {
disposition = .cancelAuthenticationChallenge
} else {
credential = alamofireManager.session.configuration.urlCredentialStorage?.defaultCredential(for: challenge.protectionSpace)
if credential != nil {
disposition = .useCredential
}
}
}
return (disposition, credential)
}
Cheers

Answer 1

Problem self solved.
now the answer for SENDING CLIENT SIDE CERTIFICATE maybe someone will need it :)
We need PKCS12 to send certificate so
import Foundation
public class PKCS12 {
let label:String?
let keyID:NSData?
let trust:SecTrust?
let certChain:[SecTrust]?
let identity:SecIdentity?
public init(PKCS12Data:NSData,password:String)
{
let importPasswordOption:NSDictionary = [kSecImportExportPassphrase as NSString:password]
var items : CFArray?
let secError:OSStatus = SecPKCS12Import(PKCS12Data, importPasswordOption, &items)
guard secError == errSecSuccess else {
if secError == errSecAuthFailed {
NSLog("ERROR: SecPKCS12Import returned errSecAuthFailed. Incorrect password?")
}
fatalError("SecPKCS12Import returned an error trying to import PKCS12 data")
}
guard let theItemsCFArray = items else { fatalError() }
let theItemsNSArray:NSArray = theItemsCFArray as NSArray
guard let dictArray = theItemsNSArray as? [[String:AnyObject]] else { fatalError() }
func f<T>(key:CFString) -> T? {
for d in dictArray {
if let v = d[key as String] as? T {
return v
}
}
return nil
}
self.label = f(key: kSecImportItemLabel)
self.keyID = f(key: kSecImportItemKeyID)
self.trust = f(key: kSecImportItemTrust)
self.certChain = f(key: kSecImportItemCertChain)
self.identity = f(key: kSecImportItemIdentity)
}
}
extension URLCredential {
public convenience init?(PKCS12 thePKCS12:PKCS12) {
if let identity = thePKCS12.identity {
self.init(
identity: identity,
certificates: thePKCS12.certChain,
persistence: URLCredential.Persistence.forSession)
}
else { return nil }
}
}
we need x509 also to do PKCS12 I was in need of generating certificates dynamically so theres the code bridged from C
-(void) createX509{
OPENSSL_init();
NSString *docPath = [NSHomeDirectory() stringByAppendingPathComponent:#"Documents/cert"];
NSString *docPathKey = [NSHomeDirectory() stringByAppendingPathComponent:#"Documents/key"];
NSString *docPathp12 = [NSHomeDirectory() stringByAppendingPathComponent:#"Documents/p12"];
NSString *dataFile = [NSString stringWithContentsOfFile:docPath
encoding:NSUTF8StringEncoding
error:NULL];
FILE *fp = fopen(docPath.UTF8String, "r");
if(fp == NULL){
fp = fopen(docPath.UTF8String, "w+");
FILE *fpKey = fopen(docPathKey.UTF8String, "w+");
EVP_PKEY * pkey;
pkey = EVP_PKEY_new();
RSA * rsa;
rsa = RSA_generate_key(
2048, /* number of bits for the key - 2048 is a sensible value */
RSA_F4, /* exponent - RSA_F4 is defined as 0x10001L */
NULL, /* callback - can be NULL if we aren't displaying progress */
NULL /* callback argument - not needed in this case */
);
EVP_PKEY_assign_RSA(pkey, rsa);
X509 * x509;
x509 = X509_new();
ASN1_INTEGER_set(X509_get_serialNumber(x509), 1);
X509_gmtime_adj(X509_get_notBefore(x509), 0);
X509_gmtime_adj(X509_get_notAfter(x509), 31536000000L);
X509_set_pubkey(x509, pkey);
X509_NAME * name;
name = X509_get_subject_name(x509);
X509_NAME_add_entry_by_txt(name, "C", MBSTRING_ASC,
(unsigned char *)"CA", -1, -1, 0);
X509_NAME_add_entry_by_txt(name, "O", MBSTRING_ASC,
(unsigned char *)"company", -1, -1, 0);
X509_NAME_add_entry_by_txt(name, "CN", MBSTRING_ASC,
(unsigned char *)"localhost", -1, -1, 0);
X509_set_issuer_name(x509, name);
X509_sign(x509, pkey, EVP_sha1());
[#"" writeToFile:docPath
atomically:YES
encoding:NSUTF8StringEncoding
error:NULL];
fp = fopen(docPath.UTF8String, "a+");
PEM_write_X509(
fp, /* write the certificate to the file we've opened */
x509 /* our certificate */);
PEM_write_PrivateKey(fpKey, pkey, NULL, NULL, 0, NULL, NULL);
fflush(fpKey);
fclose(fpKey);
fflush(fp);
fclose(fp);
dataFile = [NSString stringWithContentsOfFile:docPath
encoding:NSUTF8StringEncoding
error:NULL];
OpenSSL_add_all_algorithms();
OpenSSL_add_all_ciphers();
OpenSSL_add_all_digests();
PKCS12* p12;
p12 = PKCS12_create("password", "login", pkey, x509, NULL, 0,0,0,0,0);
if(!p12) {
fprintf(stderr, "Error creating PKCS#12 structure\n");
ERR_print_errors_fp(stderr);
exit(1);
}
fp = fopen(docPathp12.UTF8String, "w+");
if (!(fp = fopen(docPathp12.UTF8String, "wb"))) {
ERR_print_errors_fp(stderr);
exit(1);
}
i2d_PKCS12_fp(fp, p12);
PKCS12_free(p12);
fflush(fp);
fclose(fp);
}
The pkcs12 and x05 is now made so we continue in swift
public let alamofireManager: SessionManager = {
let obj = OpenSSL();
obj.createX509()
var path = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true).first;
var certPEM:String!;
var keyPEM:String!;
var certificateToPin:SecCertificate!;
var pkcs12:PKCS12?;
do{
try certPEM = String(contentsOfFile: path! + "/cert").replacingOccurrences(of: "\n", with: "")
try keyPEM = String(contentsOfFile: path! + "/key").replacingOccurrences(of: "\n", with: "")
let p12 = NSData(contentsOfFile: path! + "/p12");
pkcs12 = PKCS12.init(PKCS12Data: p12!, password: "password")
let docsurl = try! FileManager.default.url(for:.documentDirectory, in: .userDomainMask, appropriateFor: nil, create: false)
let urlAp = docsurl.appendingPathComponent("cert");
var cert64 = certPEM.replacingOccurrences(of: "-----BEGIN CERTIFICATE-----", with: "")
cert64 = cert64.replacingOccurrences(of: "-----END CERTIFICATE-----", with: "")
let certificateData = NSData(base64Encoded: cert64, options: .ignoreUnknownCharacters)
certificateToPin = SecCertificateCreateWithData(kCFAllocatorMalloc, certificateData!)
var trust: SecTrust?
let policy = SecPolicyCreateBasicX509()
let status = SecTrustCreateWithCertificates(certificateToPin!, policy, &trust)
let publicKey:SecKey?;
if status == errSecSuccess {
publicKey = SecTrustCopyPublicKey(trust!)!;
}
let dictionary = SecPolicyCopyProperties(policy)
}catch{
print("err")
}
let configuration = URLSessionConfiguration.default
configuration.timeoutIntervalForResource = Request.settings.timeout
let trustPolicies = CertTrustPolicyManager(policies: [:])
var serverTrustPolicy:[String: ServerTrustPolicy] = [
Router.baseURLString : .pinCertificates(
certificates: [certificateToPin],
validateCertificateChain: false,
validateHost: false)
]
var alamofireManager:SessionManager = Alamofire.SessionManager(configuration: configuration, delegate: SessionDelegate(), serverTrustPolicyManager: ServerTrustPolicyManager(policies: serverTrustPolicy))
alamofireManager.delegate.sessionDidReceiveChallenge = { session, challenge in
var disposition: URLSession.AuthChallengeDisposition = .useCredential
var credential: URLCredential?
if challenge.protectionSpace.authenticationMethod == NSURLAuthenticationMethodServerTrust {
disposition = URLSession.AuthChallengeDisposition.useCredential
credential = URLCredential(trust: challenge.protectionSpace.serverTrust!)
} else {
if challenge.previousFailureCount > 0 {
disposition = .cancelAuthenticationChallenge
} else {
credential = alamofireManager.session.configuration.urlCredentialStorage?.defaultCredential(for: challenge.protectionSpace)
if credential != nil {
disposition = .useCredential
}
}
}
let certs = [certificateToPin]
let persist = URLCredential.Persistence.forSession;
return (disposition, URLCredential.init(PKCS12: pkcs12!))
}
return alamofireManager
}()
There I was in need to get certificates, probably some of code is useless or badly wrote but its working ( I'm new to IOS :) ), I was also converting PEM certificates to DER there but after these operations I was finally able to do insecure connection with sending client side and created certificate with Alamofire.
The code above is gathered from everywhere!
Cheers