Security-57031.1.35.tar.gz

[apple/security.git] / Security / libsecurity_apple_csp / lib / RawSigner.h

diff --git a/Security/libsecurity_apple_csp/lib/RawSigner.h b/Security/libsecurity_apple_csp/lib/RawSigner.h
new file mode 100644 (file)
index 0000000..f2f228c
--- /dev/null
+++ b/Security/libsecurity_apple_csp/lib/RawSigner.h
@@ -0,0 +1,94 @@
+/*
+ * Copyright (c) 2000-2001,2011,2013-2014 Apple Inc. All Rights Reserved.
+ * 
+ * The contents of this file constitute Original Code as defined in and are
+ * subject to the Apple Public Source License Version 1.2 (the 'License').
+ * You may not use this file except in compliance with the License. Please obtain
+ * a copy of the License at http://www.apple.com/publicsource and read it before
+ * using this file.
+ * 
+ * This Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
+ * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT
+ * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
+ * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the
+ * specific language governing rights and limitations under the License.
+ */
+
+
+/*
+ * RawSigner.h - low-level virtual sign/verify object (no digest)
+ */
+ 
+#ifndef        _RAW_SIGNER_H_
+#define _RAW_SIGNER_H_
+
+#include <security_cdsa_utilities/context.h>
+#include <security_utilities/alloc.h>
+
+class RawSigner {
+public:
+       RawSigner(
+               Allocator       &alloc,
+               CSSM_ALGORITHMS digestAlg)      :
+                       mInitFlag(false), 
+                       mIsSigning(false),
+                       mDigestAlg(digestAlg),
+                       mAlloc(alloc) { }
+       virtual ~RawSigner()    { }
+       
+       /* 
+        * The use of our mDigestAlg variable is pretty crufty. For some algs, it's 
+        * known and specified at construction time (e.g., CSSM_ALGID_MD5WithRSA). 
+        * For some algs, it's set by CSPFullPluginSession via 
+        * CSPContext::setDigestAlgorithm during raw sign/verify.
+        */
+       void                    setDigestAlg(CSSM_ALGORITHMS alg)
+                                                                                       { mDigestAlg = alg; }
+
+       /* 
+        * The remaining functions must be implemented by subclass. 
+        */
+
+       /* reusable init */
+       virtual void signerInit(
+               const Context   &context,
+               bool                    isSigning) = 0;
+       
+       /* sign */
+       virtual void sign(
+               const void              *data, 
+               size_t                  dataLen,
+               void                    *sig,   
+               size_t                  *sigLen) = 0;   /* IN/OUT */
+               
+       /* verify */
+       virtual void verify(
+               const void              *data, 
+               size_t                  dataLen,
+               const void              *sig,                   
+               size_t                  sigLen) = 0;    
+               
+       /* works for both, but only used for signing */
+       virtual size_t maxSigSize() = 0;
+
+protected:
+       bool                    mInitFlag;                              // true after init
+       bool                    mOpStarted;                             // true after update
+       bool                    mIsSigning;
+       CSSM_ALGORITHMS mDigestAlg;                             // for raw sign/verify
+       Allocator       &mAlloc;
+       
+       bool                    initFlag()                              { return mInitFlag; }
+       void                    setInitFlag(bool flag)  { mInitFlag = flag; }
+       bool                    opStarted()                     { return mOpStarted; }
+       void                    setOpStarted(bool flag) { mOpStarted = flag; }
+       bool                    isSigning()                             { return mIsSigning; }
+       void                    setIsSigning(bool signing)
+                                                                                       { mIsSigning = signing; }
+       CSSM_ALGORITHMS digestAlg()                             { return mDigestAlg; }
+       Allocator       &alloc()                                { return mAlloc; }
+};
+
+
+#endif /* _RAW_SIGNER_H_ */