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Create PKCS1 RSA Signature with PEM Private KeyDemonstrates how to load a private key from a PEM file and create a PKCS1 RSA digital signature.
#include <CkPrivateKey.h> #include <CkString.h> #include <CkRsa.h> void ChilkatSample(void) { CkPrivateKey pkey; // Load the private key from an RSA PEM file: pkey.LoadPemFile("pvkey2_rsa.pem"); bool success; CkString pkeyXml; // Get the private key in XML format: pkeyXml = pkey.getXml(); CkRsa rsa; // Any string argument automatically begins the 30-day trial. success = rsa.UnlockComponent("30-day trial"); if (success != true) { printf("RSA component unlock failed\n"); return; } // Import the private key into the RSA component: success = rsa.ImportPrivateKey(pkeyXml); if (success != true) { printf("%s\n",rsa.lastErrorText()); return; } // This example will sign a string, and receive the signature // in a hex-encoded string. Therefore, set the encoding mode // to "hex": rsa.put_EncodingMode("hex"); CkString strData; strData = "This is the string to be signed."; // Sign the string using the sha-1 hash algorithm. // Other valid choices are "md2" and "md5". CkString hexSig; hexSig = rsa.signStringENC(strData,"sha-1"); printf("%s\n",(const char *)hexSig); printf("Success!\n"); } |
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