Function TestOpenSSHEd25519

tests/test_crypto.cpp:541–603

----------------------------------------------------------------------------- Purpose: Test parsing and re-writing of keys in OpenSSH formats -----------------------------------------------------------------------------

// Purpose: Test parsing and re-writing of keys in OpenSSH formats
//-----------------------------------------------------------------------------
void TestOpenSSHEd25519()
{
	char buf[ 2048 ];

	// Generate some keys, and make sure we can round trip them
	{
		CECSigningPublicKey pubKey;
		CECSigningPrivateKey privKey;
		CCrypto::GenerateSigningKeyPair( &pubKey, &privKey );

		uint32 cbBuf;

		// Get public key as authorized_keys format.
		// Should fail if we tell it the buffer is too small
		CHECK( !pubKey.GetAsOpenSSHAuthorizedKeys( buf, 16, &cbBuf, "" ) );
		CHECK( pubKey.GetAsOpenSSHAuthorizedKeys( buf, sizeof(buf), &cbBuf, "" ) );
		CHECK( (int)cbBuf == V_strlen( buf )+1 );
		CHECK( 75 <= cbBuf && cbBuf <= 85 ); // typical size (assuming no password or key comment).  Not necessarily a bug if this assert fires, but maybe something suspicious

		// Parse it back out, make sure it matches
		CECSigningPublicKey pubKey2;
		CHECK( pubKey2.LoadFromAndWipeBuffer( buf, cbBuf ) );
		CHECK( pubKey2 == pubKey );

		// Get private key in openSSH PEM-ish format.
		// Should fail if we tell it the buffer is too small
		CHECK( !privKey.GetAsPEM( buf, 64, &cbBuf ) );
		CHECK( privKey.GetAsPEM( buf, sizeof(buf), &cbBuf ) );
		CHECK( (int)cbBuf == V_strlen( buf )+1 );
		CHECK( 370 <= cbBuf && cbBuf <= 390 ); // typical size (assuming no password or key comment).  Not necessarily a bug if this assert fires, but maybe something suspicious

		// Parse it back out, make sure it matches
		CECSigningPrivateKey privKey2;
		CHECK( privKey2.LoadFromAndWipeBuffer( buf, cbBuf ) );
		CHECK( privKey2 == privKey );

		CHECK( privKey2.MatchesPublicKey( pubKey2 ) );
	}

	// Parse some known keys
	{
		CUtlBuffer bufPrivKeyPEMA;
		bufPrivKeyPEMA.PutString(
R"PEM(
-----BEGIN OPENSSH PRIVATE KEY-----
b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtzc2gtZW
QyNTUxOQAAACC3vdN6llE0by4d7aFur0nBXdu5hXJb7LLkiC5UCEPFDgAAAJgJaJG1CWiR
tQAAAAtzc2gtZWQyNTUxOQAAACC3vdN6llE0by4d7aFur0nBXdu5hXJb7LLkiC5UCEPFDg
AAAECpUfg4C0BkgsCO+GlFAbcTQZUeFFQcamXzDA1tx7aNWre903qWUTRvLh3toW6vScFd
27mFclvssuSILlQIQ8UOAAAAEmZsZXRjaGVyZEBzcmNkczAwMwECAw==
-----END OPENSSH PRIVATE KEY-----
)PEM" );
		CECSigningPrivateKey privKeyA;
		CHECK( privKeyA.LoadFromAndWipeBuffer( bufPrivKeyPEMA.Base(), bufPrivKeyPEMA.TellPut() ) );

		CUtlBuffer bufPubKeyA;
		bufPubKeyA.PutString( "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAILe903qWUTRvLh3toW6vScFd27mFclvssuSILlQIQ8UO" );
		CECSigningPublicKey pubKeyA;