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(Objective-C) Duplicate OpensSSL Command that Decrypts Binary DERThis example duplicates the following: openssl smime -decrypt -in INPUT_FILE -inform der -binary -out OUTPUT_FILE -recip PEM_CERT_AND_KEY -passin pass:PRIVKEY_PASSWORD Note: Although "smime" is the OpenSSL command, we're not really dealing with S/MIME. The arguments "-inform der -binary" indicate that the input is simply the binary DER (i.e. the PKCS7 binary encrypted object). The output can be any type of file (whatever was encrypted). Note: This example requires Chilkat v11.0.0 or greater.
#import <CkoCrypt2.h> #import <CkoPem.h> #import <CkoPrivateKey.h> #import <CkoCert.h> BOOL success = NO; // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. CkoCrypt2 *crypt = [[CkoCrypt2 alloc] init]; crypt.CryptAlgorithm = @"pki"; CkoPem *pem = [[CkoPem alloc] init]; success = [pem LoadPemFile: @"qa_data/pem/myPem.pem" password: @"password"]; if (success == NO) { NSLog(@"%@",pem.LastErrorText); return; } CkoPrivateKey *privkey = [[CkoPrivateKey alloc] init]; success = [pem PrivateKeyAt: [NSNumber numberWithInt: 0] privKey: privkey]; if (success == NO) { NSLog(@"%@",pem.LastErrorText); return; } CkoCert *cert = [[CkoCert alloc] init]; success = [pem CertAt: [NSNumber numberWithInt: 0] cert: cert]; if (success == NO) { NSLog(@"%@",pem.LastErrorText); return; } success = [crypt SetDecryptCert2: cert key: privkey]; if (success == NO) { NSLog(@"%@",crypt.LastErrorText); return; } success = [crypt CkDecryptFile: @"qa_data/infile.enc" destFile: @"qa_output/outfile.dat"]; if (success == NO) { NSLog(@"%@",crypt.LastErrorText); return; } NSLog(@"%@",@"Success."); |
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