SecPKCS12Import any time return empty items - ios

Question

This is my code. Any time items return is null.I have tried in swift and objective c,but nothing.
let certName : String = "private_key"//name of the certificate//
//get p12 file path
let resourcePath: String = NSBundle.mainBundle().pathForResource(certName, ofType: "p12")!
let p12Data: NSData = NSData(contentsOfFile: resourcePath)!
//create key dictionary for reading p12 file
let key : NSString = kSecImportExportPassphrase as NSString
let options : NSDictionary = [key : "password"]
//create variable for holding security information
var privateKeyRef: SecKeyRef? = nil
var items : CFArray?
let securityError: OSStatus = SecPKCS12Import(p12Data, options, &items)
print(items)

Answer 1

I'm using pkcs8. And you need to include
#include <CommonCrypto/CommonDigest.h>
#include <openssl/engine.h>
openssl download from Github
+ (NSString*) getSignatureData:(NSString*) signableData {
// get private key path
NSString* path = [[NSBundle mainBundle] pathForResource:#"private"
ofType:#"der"];
NSData* datasss = [signableData dataUsingEncoding:NSNonLossyASCIIStringEncoding];
char* text = (char*) [signableData UTF8String];
unsigned char *data;
data = (unsigned char *) text;
//creates a new file BIO with mode, mode the meaning of mode is the same as the stdio function fopen()
BIO *in = BIO_new_file([path cStringUsingEncoding:NSUTF8StringEncoding], "rb");
//PKCS#8 private key info structure
PKCS8_PRIV_KEY_INFO *p8inf = d2i_PKCS8_PRIV_KEY_INFO_bio(in, NULL);
EVP_PKEY *pkey = EVP_PKCS82PKEY(p8inf);
PKCS8_PRIV_KEY_INFO_free(p8inf);
BIO_free(in);
uint8_t * cipherBuffer = NULL;
// Calculate the buffer sizes.
unsigned int cipherBufferSize = RSA_size(pkey->pkey.rsa);
unsigned int signatureLength;
// Allocate some buffer space.
cipherBuffer = malloc(cipherBufferSize);
memset((void *)cipherBuffer, 0x0, cipherBufferSize);
unsigned char hashedChars[32];
//return a pointer to the hash value
unsigned char *openSSLHash = CC_SHA256(datasss.bytes, (CC_LONG)signableData.length, hashedChars);
//unsigned char *openSSLHash1 = SHA256(data, signableData.length, NULL);
/*
* The following function sign and verify a X509_SIG ASN1 object inside
* PKCS#8 padded RSA encryption
*/
RSA_sign(NID_sha256, openSSLHash, SHA256_DIGEST_LENGTH, cipherBuffer, &signatureLength, pkey->pkey.rsa);
NSData *signedData = [NSData dataWithBytes:(const void*)cipherBuffer length:signatureLength];
EVP_PKEY_free(pkey);
NSString *base64String = [signedData base64EncodedStringWithOptions:0];
return base64String;
}