OAuthSignatureMethod_RSA_SHA1 Class Reference

Inheritance diagram for OAuthSignatureMethod_RSA_SHA1:

Collaboration diagram for OAuthSignatureMethod_RSA_SHA1:

Public Member Functions
	get_name ()
	build_signature (&$request, $consumer, $token)
	check_signature (&$request, $consumer, $token, $signature)
	check_signature (&$request, $consumer, $token, $signature)

Protected Member Functions
	fetch_public_cert (&$request)
	fetch_private_cert (&$request)

Detailed Description

Definition at line 137 of file OAuth.php.

Member Function Documentation

build_signature()

OAuthSignatureMethod_RSA_SHA1::build_signature	(	&	$request,
			$consumer,
			$token
	)

Definition at line 164 of file OAuth.php.

    {
        $base_string = $request->get_signature_base_string();
        $request->base_string = $base_string;
 
        // Fetch the private key cert based on the request
        $cert = $this->fetch_private_cert($request);
 
        // Pull the private key ID from the certificate
        $privatekeyid = openssl_get_privatekey($cert);
 
        // Sign using the key
        $ok = openssl_sign($base_string, $signature, $privatekeyid);
 
        // Release the key resource
        openssl_free_key($privatekeyid);
 
        return base64_encode($signature);
    }

References $ok, and fetch_private_cert().

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check_signature()

OAuthSignatureMethod_RSA_SHA1::check_signature	(	&	$request,
			$consumer,
			$token,
			$signature
	)

Reimplemented from OAuthSignatureMethod.

Definition at line 184 of file OAuth.php.

    {
        $decoded_sig = base64_decode($signature);
 
        $base_string = $request->get_signature_base_string();
 
        // Fetch the public key cert based on the request
        $cert = $this->fetch_public_cert($request);
 
        // Pull the public key ID from the certificate
        $publickeyid = openssl_get_publickey($cert);
 
        // Check the computed signature against the one passed in the query
        $ok = openssl_verify($base_string, $decoded_sig, $publickeyid);
 
        // Release the key resource
        openssl_free_key($publickeyid);
 
        return $ok == 1;
    }

References $ok, and fetch_public_cert().

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fetch_private_cert()

OAuthSignatureMethod_RSA_SHA1::fetch_private_cert ( &  $request )

protected

Definition at line 155 of file OAuth.php.

    {
        // not implemented yet, ideas are:
        // (1) do a lookup in a table of trusted certs keyed off of consumer
        //
        // either way should return a string representation of the certificate
        throw Exception("fetch_private_cert not implemented");
    }

Referenced by build_signature().

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fetch_public_cert()

OAuthSignatureMethod_RSA_SHA1::fetch_public_cert ( &  $request )

protected

Definition at line 144 of file OAuth.php.

    {
        // not implemented yet, ideas are:
        // (1) do a lookup in a table of trusted certs keyed off of consumer
        // (2) fetch via http using a url provided by the requester
        // (3) some sort of specific discovery code based on request
        //
        // either way should return a string representation of the certificate
        throw Exception("fetch_public_cert not implemented");
    }

Referenced by check_signature().

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get_name()

OAuthSignatureMethod_RSA_SHA1::get_name

(

)

Definition at line 139 of file OAuth.php.

    {
        return "RSA-SHA1";
    }

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The documentation for this class was generated from the following file:

• Modules/LTIConsumer/lib/OAuth.php