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(Objective-C) RSA Signature using Private Key from .snk FileSee more RSA ExamplesA .snk file (Strong Name Key file) is a file format used in the .NET ecosystem to store an RSA public/private key pair. This key pair is typically used for strong-naming assemblies, which is a process of signing .NET assemblies to ensure their integrity and to uniquely identify them.This example loads a private key from a .snk file and creates an RSA signature.
#import <CkoRsa.h> #import <NSString.h> CkoRsa *rsa = [[CkoRsa alloc] init]; // Load the .snk and return the private key as XML. NSString *xmlStr = [rsa SnkToXml: @"./test.snk"]; if (rsa.LastMethodSuccess == NO) { NSLog(@"%@",rsa.LastErrorText); return; } BOOL success = [rsa ImportPrivateKey: xmlStr]; if (success == NO) { NSLog(@"%@",rsa.LastErrorText); return; } // Sign the SHA-256 hash of the utf-8 byte representation of the contents of sb // Return the signature in base64 format. rsa.EncodingMode = @"base64"; rsa.Charset = @"utf-8"; NSString *sigBase64 = [rsa SignStringENC: @"This is the text to be hashed and signed." hashAlg: @"sha256"]; if (rsa.LastMethodSuccess == NO) { NSLog(@"%@",rsa.LastErrorText); return; } NSLog(@"%@%@",@"RSA signature as base64: ",sigBase64); |
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