Hello Mailinglist,
I want to create a file reader/writer in XML. To avoid unseen changes on the
file I want to sign it. My idea was to create a RSA key pair and put it
hardcoded into my file reader/writer. With the private RSA key I will sign the
file while writing to HD and the reader will use the public key to look if
someone changes the file.
1. How can I read RSA keys from the RAM? Beside xmlSecCryptoAppKeyLoad() I have
found no function to do that.
2. How to create a pair of RSA keys?
// Here is my first try. It seems that the key is correctly created.
// Now I need a possibility to write it to HD. How to do it?
void XmlSecSigning::CreateRsaKey(int KeyBitLength) { // KeyBitLength is always
2048
const unsigned char *cKeyName=BAD_CAST"rsa";
InitXmlSec(); // Methods from sign1.c example
xmlSecKey *oKey = xmlSecKeyGenerateByName(cKeyName, KeyBitLength, 0);
// oKey is !=0, so it works.
//FILE *oFile;
//oFile=fopen("D:\\KeyFile.txt", "w");
//fprintf(oFile, PubKeyHex.c_str());
//xmlSecKeyDebugDump(oKey, oFile);
// This lines will result in:
//== KEY
//=== method: RSAKeyValue
//=== key type: Private
//=== key usage: -1
//=== rsa key: size = 2048
}
3. What should I put into the last param of xmlSecKeyGenerateByName()?
If I search for this function in the Internet, some people put here 8 or 12 on
DES keys for example.
Regards
Martin
PS: In the sign1.c examle is a BAD_CAST missing: In function sign_file()
> if(xmlSecKeySetName(dsigCtx->signKey, key_file) < 0) { // Param key_file
> needs a BAD_CAST.
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