libsecurity_cdsa_client/lib/cspclient.h

   1 /*
   2  * Copyright (c) 2000-2002 Apple Computer, Inc. All Rights Reserved.
   3  *
   4  * The contents of this file constitute Original Code as defined in and are
   5  * subject to the Apple Public Source License Version 1.2 (the 'License').
   6  * You may not use this file except in compliance with the License. Please obtain
   7  * a copy of the License at http://www.apple.com/publicsource and read it before
   8  * using this file.
   9  *
  10  * This Original Code and all software distributed under the License are
  11  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
  12  * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT
  13  * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
  14  * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the
  15  * specific language governing rights and limitations under the License.
  16  */
  17
  18
  19 //
  20 // cspclient - client interface to CSSM CSPs and their operations
  21 //
  22 #ifndef _H_CDSA_CLIENT_CSPCLIENT
  23 #define _H_CDSA_CLIENT_CSPCLIENT  1
  24
  25 #include <security_cdsa_client/cssmclient.h>
  26 #include <security_cdsa_utilities/context.h>
  27 #include <security_cdsa_utilities/cssmacl.h>
  28
  29 namespace Security {
  30 namespace CssmClient {
  31
  32
  33 //
  34 // A CSP attachment
  35 //
  36 class CSPImpl : public AttachmentImpl
  37 {
  38 public:
  39         CSPImpl(const Guid &guid);
  40         CSPImpl(const Module &module);
  41         virtual ~CSPImpl();
  42
  43     // the least inappropriate place for this one
  44     void freeKey(CssmKey &key, const AccessCredentials *cred = NULL, bool permanent = false);
  45 };
  46
  47 class CSP : public Attachment
  48 {
  49 public:
  50         typedef CSPImpl Impl;
  51
  52         explicit CSP(Impl *impl) : Attachment(impl) {}
  53         CSP(const Guid &guid) : Attachment(new Impl(guid)) {}
  54         CSP(const Module &module) : Attachment(new Impl(module)) {}
  55
  56         Impl *operator ->() const { return &impl<Impl>(); }
  57         Impl &operator *() const { return impl<Impl>(); }
  58 };
  59
  60 //
  61 // A cryptographic context.
  62 // Contexts always belong to CSPs (CSP attachments).
  63 //
  64 class Context : public ObjectImpl
  65 {
  66 public:
  67         Context(const CSP &csp, CSSM_ALGORITHMS alg = CSSM_ALGID_NONE);
  68         ~Context();
  69
  70         CSP attachment() const { return parent<CSP>(); }
  71         Module module() const { return attachment()->module(); }
  72
  73         CSSM_ALGORITHMS algorithm() const { return mAlgorithm; }
  74         void algorithm(CSSM_ALGORITHMS alg);
  75
  76         const AccessCredentials *cred() const   { return mCred; }
  77         void cred(const CSSM_ACCESS_CREDENTIALS *cred);
  78         void cred(const CSSM_ACCESS_CREDENTIALS &cred) { this->cred(&cred); }
  79
  80 public:
  81         CSSM_CC_HANDLE handle() { activate(); return mHandle; }
  82
  83     uint32 getOutputSize(uint32 inputSize, bool encrypt = true);
  84     void getOutputSize(CSSM_QUERY_SIZE_DATA &sizes, uint32 count, bool encrypt = true);
  85
  86 public:
  87         // don't use this section unless you know what you're doing!
  88         void override(const ::Context &ctx);
  89
  90         template <class T>
  91         void set(CSSM_ATTRIBUTE_TYPE type, const T &value)
  92         {
  93                 if (isActive()) {
  94                         ::Context::Attr attr(type, value);
  95                         check(CSSM_UpdateContextAttributes(mHandle, 1, &attr));
  96                 }
  97         }
  98
  99         void set(CSSM_ATTRIBUTE_TYPE type, uint32 value)
 100         {
 101                 if (isActive()) {
 102                         ::Context::Attr attr(type, value);
 103                         check(CSSM_UpdateContextAttributes(mHandle, 1, &attr));
 104                 }
 105         }
 106
 107     template <class T>
 108     void add(CSSM_ATTRIBUTE_TYPE type, const T &value)
 109     { activate(); set(type, value); }
 110
 111     void add(CSSM_ATTRIBUTE_TYPE type, uint32 value)
 112     { activate(); set(type, value); }
 113
 114 protected:
 115         void deactivate();
 116
 117         virtual void init(); // Subclasses must implement if they support staged operations.
 118
 119         void unstaged()
 120         { activate(); if (mStaged) CssmError::throwMe(CSSMERR_CSP_STAGED_OPERATION_IN_PROGRESS); }
 121
 122         void staged()
 123         { if (!mStaged) init(); }
 124
 125         const AccessCredentials *neededCred()
 126         { return AccessCredentials::needed(mCred); }
 127
 128 protected:
 129         CSSM_ALGORITHMS mAlgorithm;             // intended algorithm
 130         CSSM_CC_HANDLE mHandle;                 // CSSM CC handle
 131         bool mStaged;                                   // staged in progress
 132         const AccessCredentials *mCred; // if explicitly set
 133 };
 134
 135
 136 //
 137 // An RccBearer holds a ResourceControlContext. Note that this is a composite
 138 // of an AccessCredentials and an AclEntryInput. We allow setting the whole
 139 // thing, or its two components separately. A complete rcc set (via ::rcc)
 140 // overrides any components.
 141 // @@@ Perhaps we should merge components into a specified rcc? Iffy, though...
 142 // Note: We call the credential components "opCred" to distinguish it from
 143 // the "cred" of a CredBearer; some classes are both. As a rule, the "cred" goes
 144 // into the context, while the "opCred" gets passed as an argument.
 145 //
 146 class RccBearer {
 147 public:
 148         RccBearer() : mOpCred(NULL), mOwner(NULL), mRcc(NULL) { }
 149
 150         const AccessCredentials *opCred() const         { return mOpCred; }
 151         void opCred(const CSSM_ACCESS_CREDENTIALS *cred) { mOpCred = AccessCredentials::overlay(cred); }
 152         void opCred(const CSSM_ACCESS_CREDENTIALS &cred) { this->opCred(&cred); }
 153         const AclEntryInput *owner() const                      { return mOwner; }
 154         void owner(const CSSM_ACL_ENTRY_INPUT *owner) { mOwner = AclEntryInput::overlay(owner); }
 155         void owner(const CSSM_ACL_ENTRY_INPUT &owner) { this->owner(&owner); }
 156         void owner(const CSSM_ACL_ENTRY_PROTOTYPE *owner);
 157         void owner(const CSSM_ACL_ENTRY_PROTOTYPE &owner) { this->owner(&owner); }
 158         const ResourceControlContext *rcc() const       { return mRcc; }
 159         void rcc(const CSSM_RESOURCE_CONTROL_CONTEXT *rcc)
 160                         { mRcc = ResourceControlContext::overlay(rcc); }
 161         void rcc(const CSSM_RESOURCE_CONTROL_CONTEXT &rcc) { this->rcc(&rcc); }
 162
 163 protected:
 164         const ResourceControlContext &compositeRcc() const;
 165
 166 private:
 167         // an RCC contains both a cred and entryInput
 168         // mCred/mAcl are only considered if mRcc is not set (NULL)
 169         const AccessCredentials *mOpCred;
 170         const AclEntryInput *mOwner;
 171         const ResourceControlContext *mRcc;
 172
 173         mutable ResourceControlContext mWorkRcc; // work area
 174         mutable AclEntryInput mWorkInput;               // work area
 175 };
 176
 177
 178 //
 179 // A PassThough context
 180 //
 181 class PassThrough : public Context
 182 {
 183 public:
 184         PassThrough(const CSP &csp) : Context(csp) { }
 185
 186 public:
 187         void operator () (uint32 passThroughId, const void *inData, void **outData);
 188
 189         template <class TIn, class TOut>
 190         void operator () (uint32 passThroughId, const TIn *inData, TOut **outData)
 191         { operator () (passThroughId, (const void *)inData, (void **)outData); }
 192
 193         template <class TIn>
 194         void operator () (uint32 passThroughId, const TIn *inData)
 195         { operator () (passThroughId, (const void *)inData, NULL); }
 196
 197         const CSSM_KEY *key() const { return mKey; }
 198         void key(const CSSM_KEY *k) { mKey = k; set(CSSM_ATTRIBUTE_KEY, k); }
 199
 200 protected:
 201         void activate();
 202
 203 protected:
 204         const CSSM_KEY *mKey;
 205 };
 206
 207
 208 //
 209 // A Digest context
 210 //
 211 class Digest : public Context
 212 {
 213 public:
 214         Digest(const CSP &csp, CSSM_ALGORITHMS alg) : Context(csp, alg) { }
 215
 216 public:
 217         // integrated
 218         void digest(const CssmData &data, CssmData &digest) { this->digest(&data, 1, digest); }
 219         void digest(const CssmData *data, uint32 count, CssmData &digest);
 220
 221         // staged
 222         void digest(const CssmData &data) { digest(&data, 1); }
 223         void digest(const CssmData *data, uint32 count);
 224         void operator () (CssmData &digest);
 225         CssmData operator () () { CssmData digest; (*this)(digest); return digest; }
 226
 227 protected:
 228         void activate();
 229 };
 230
 231
 232 //
 233 // A [P]RNG context
 234 //
 235 class Random : public Context
 236 {
 237 public:
 238         Random(const CSP &csp, CSSM_ALGORITHMS alg) : Context(csp, alg), mSeed(NULL), mSize(1) { }
 239         Random(const CSP &csp, CSSM_ALGORITHMS alg, const CssmCryptoData &seed)
 240                 : Context(csp, alg), mSeed(&seed), mSize(1) { }
 241         Random(const CSP &csp, CSSM_ALGORITHMS alg, uint32 size)
 242                 : Context(csp, alg), mSeed(NULL), mSize(size) { }
 243         Random(const CSP &csp, CSSM_ALGORITHMS alg, const CssmCryptoData &seed, uint32 size)
 244                 : Context(csp, alg), mSeed(&seed), mSize(size) { }
 245
 246         void seed(const CssmCryptoData &data);
 247         void size(uint32 size);
 248
 249 public:
 250         void generate(CssmData &data, uint32 size = 0);
 251
 252         // alternate function-call form
 253         CssmData operator () (uint32 size = 0)
 254         { CssmData output; generate(output, size); return output; }
 255
 256 protected:
 257         void activate();
 258
 259 private:
 260         const CssmCryptoData *mSeed;
 261         uint32 mSize;
 262 };
 263
 264
 265 } // end namespace CssmClient
 266 } // end namespace Security
 267
 268 #endif // _H_CDSA_CLIENT_CSPCLIENT