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(Objective-C) Duplicate CSR Created by OpenSSL with Config.cnfSee more CSR ExamplesDemonstrates how to duplicate a CSR created by the following commands: # Generate Private Key openssl ecparam -name secp256k1 -genkey -noout -out PrivateKey.pem #Generate CSR openssl req -new -sha256 -key PrivateKey.pem -extensions v3_req -config Config.cnf -out CSR.csr
#import <CkoStringBuilder.h> #import <CkoCsr.h> #import <CkoXml.h> #import <CkoEcc.h> #import <CkoPrng.h> #import <CkoPrivateKey.h> #import <NSString.h> // This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // This example duplicates the CSR created by OpenSSL with the following config file: // oid_section = OIDs // [ OIDs ] // certificateTemplateName= 1.3.6.1.4.1.311.20.2 // // [ req ] // default_bits = 2048 // emailAddress = it@example.sa // req_extensions = v3_req // x509_extensions = v3_ca // prompt = no // default_md = sha256 // req_extensions = req_ext // distinguished_name = dn // // [ v3_req ] // basicConstraints = CA:FALSE // keyUsage = digitalSignature, nonRepudiation, keyEncipherment // // [req_ext] // certificateTemplateName = ASN1:PRINTABLESTRING:ZATCA-Code-Signing // subjectAltName = dirName:alt_names // // [ dn ] // CN =EXAMPLE-CORP # Common Name // C=SA # Country Code e.g SA // OU=HEAD-OFFICE # Organization Unit Name // O=ASC # Organization Name // // [alt_names] // SN=1-ASC|2-V01|3-1234567890 # EGS Serial Number 1-ABC|2-PQR|3-XYZ // UID=312345678900003 # Organization Identifier (VAT Number) // title=1100 # Invoice Type // registeredAddress=Dammam # Address // businessCategory=IT # Business Category // The OpenSSL commands we are duplicating: // openssl ecparam -name secp256k1 -genkey -noout -out PrivateKey.pem // openssl req -new -sha256 -key PrivateKey.pem -extensions v3_req -config Config.cnf -out CSR.csr // The 1st step is to actually use OpenSSL to generate a sample CSR.csr that we wish to duplicate. // With the sample CSR.csr, we get the ExtensionRequest as XML. // For example: CkoStringBuilder *sbCsr = [[CkoStringBuilder alloc] init]; BOOL success = [sbCsr LoadFile: @"qa_data/csr/openssl_cnf/CSR.csr" charset: @"utf-8"]; if (success == NO) { NSLog(@"%@",@"Failed to load CSR.csr"); return; } CkoCsr *csr0 = [[CkoCsr alloc] init]; success = [csr0 LoadCsrPem: [sbCsr GetAsString]]; if (success == NO) { NSLog(@"%@",csr0.LastErrorText); return; } CkoXml *xml0 = [[CkoXml alloc] init]; success = [csr0 GetExtensionRequest: xml0]; if (success == NO) { NSLog(@"%@",csr0.LastErrorText); return; } // Let's examine the extension request.. NSLog(@"%@",[xml0 GetXml]); // <?xml version="1.0" encoding="utf-8"?> // <set> // <sequence> // <sequence> // <oid>1.3.6.1.4.1.311.20.2</oid> // <asnOctets> // <printable>ZATCA-Code-Signing</printable> // </asnOctets> // </sequence> // <sequence> // <oid>2.5.29.17</oid> // <asnOctets> // <sequence> // <contextSpecific tag="4" constructed="1"> // <sequence> // <set> // <sequence> // <oid>2.5.4.4</oid> // <utf8>1-ASC|2-V01|3-1234567890</utf8> // </sequence> // </set> // <set> // <sequence> // <oid>0.9.2342.19200300.100.1.1</oid> // <utf8>312345678900003</utf8> // </sequence> // </set> // <set> // <sequence> // <oid>2.5.4.12</oid> // <utf8>1100</utf8> // </sequence> // </set> // <set> // <sequence> // <oid>2.5.4.26</oid> // <utf8>Dammam</utf8> // </sequence> // </set> // <set> // <sequence> // <oid>2.5.4.15</oid> // <utf8>IT</utf8> // </sequence> // </set> // </sequence> // </contextSpecific> // </sequence> // </asnOctets> // </sequence> // </sequence> // </set> // If you wish to generate the above XML without going through the above steps, copy the XML into // the online tool at https://tools.chilkat.io/xmlCreate // Here is the generated code for the above XML: CkoXml *xml = [[CkoXml alloc] init]; xml.Tag = @"set"; [xml UpdateChildContent: @"sequence|sequence|oid" value: @"1.3.6.1.4.1.311.20.2"]; [xml UpdateChildContent: @"sequence|sequence|asnOctets|printable" value: @"ZATCA-Code-Signing"]; [xml UpdateChildContent: @"sequence|sequence[1]|oid" value: @"2.5.29.17"]; [xml UpdateAttrAt: @"sequence|sequence[1]|asnOctets|sequence|contextSpecific" autoCreate: YES attrName: @"tag" attrValue: @"4"]; [xml UpdateAttrAt: @"sequence|sequence[1]|asnOctets|sequence|contextSpecific" autoCreate: YES attrName: @"constructed" attrValue: @"1"]; [xml UpdateChildContent: @"sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set|sequence|oid" value: @"2.5.4.4"]; [xml UpdateChildContent: @"sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set|sequence|utf8" value: @"1-ASC|2-V01|3-1234567890"]; [xml UpdateChildContent: @"sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set[1]|sequence|oid" value: @"0.9.2342.19200300.100.1.1"]; [xml UpdateChildContent: @"sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set[1]|sequence|utf8" value: @"312345678900003"]; [xml UpdateChildContent: @"sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set[2]|sequence|oid" value: @"2.5.4.12"]; [xml UpdateChildContent: @"sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set[2]|sequence|utf8" value: @"1100"]; [xml UpdateChildContent: @"sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set[3]|sequence|oid" value: @"2.5.4.26"]; [xml UpdateChildContent: @"sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set[3]|sequence|utf8" value: @"Dammam"]; [xml UpdateChildContent: @"sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set[4]|sequence|oid" value: @"2.5.4.15"]; [xml UpdateChildContent: @"sequence|sequence[1]|asnOctets|sequence|contextSpecific|sequence|set[4]|sequence|utf8" value: @"IT"]; // We'll need a new secp256k1 private key, so let's generate it. CkoEcc *ecdsa = [[CkoEcc alloc] init]; CkoPrng *prng = [[CkoPrng alloc] init]; CkoPrivateKey *privKey = [ecdsa GenEccKey: @"secp256k1" prng: prng]; if (ecdsa.LastMethodSuccess == NO) { NSLog(@"%@",ecdsa.LastErrorText); return; } NSLog(@"%@",@"Generated secp256k1 private key."); // Use a new CSR object to generate a CSR with the private key and extension request. CkoCsr *csr = [[CkoCsr alloc] init]; // Add the [dn] fields // [ dn ] // CN =EXAMPLE-CORP # Common Name // C=SA # Country Code e.g SA // OU=HEAD-OFFICE # Organization Unit Name // O=ASC # Organization Name csr.CommonName = @"EXAMPLE-CORP"; csr.Country = @"SA"; csr.CompanyDivision = @"HEAD-OFFICE"; csr.Company = @"ASC"; // Add the extension request to the CSR [csr SetExtensionRequest: xml]; // Generate the CSR with the extension request NSString *csrPem = [csr GenCsrPem: privKey]; if (csr.LastMethodSuccess == NO) { NSLog(@"%@",csr.LastErrorText); return; } NSLog(@"%@",csrPem); // Sample output: // -----BEGIN CERTIFICATE REQUEST----- // MIIBuDCCAV8CAQAwSDEVMBMGA1UEAwwMRVhBTVBMRS1DT1JQMQswCQYDVQQGEwJT // QTEUMBIGA1UECwwLSEVBRC1PRkZJQ0UxDDAKBgNVBAoMA0FTQzBWMBAGByqGSM49 // AgEGBSuBBAAKA0IABFI5rusr76HiJcMMr1r4L0B0BOAs6azLkt/RwHoT6A0xFRRt // tulWT40tNhx3qJ4I5ePNgMceOEtuK1kMGVTovI6ggbcwgbQGCSqGSIb3DQEJDjGB // pjCBozAhBgkrBgEEAYI3FAIEFBMSWkFUQ0EtQ29kZS1TaWduaW5nMH4GA1UdEQR3 // MHWkczBxMSEwHwYDVQQEDBgxLUFTQ3wyLVYwMXwzLTEyMzQ1Njc4OTAxHzAdBgoJ // kiaJk/IsZAEBDA8zMTIzNDU2Nzg5MDAwMDMxDTALBgNVBAwMBDExMDAxDzANBgNV // BBoMBkRhbW1hbTELMAkGA1UEDwwCSVQwCgYIKoZIzj0EAwIDRwAwRAIgJnbgpSGb // diB+0M1VTqc1GU9sFsfnOvVN/8WhWRRxQIwCIF5eH9vgMgXyoU284X8Bx3dqOJ4q // xashGWci87POxSvT // -----END CERTIFICATE REQUEST----- |
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