securityd-55199.3.tar.gz

[apple/securityd.git] / src / credential.cpp

diff --git a/src/credential.cpp b/src/credential.cpp
index 5eaa6a1f97822b2cba4b4c09435ea8abc8b51c03..dcb38c22479ee4da6c48cc5fa740d0d64e1ff052 100644 (file)
--- a/src/credential.cpp
+++ b/src/credential.cpp
@@ -32,16 +32,16 @@ extern "C" int checkpw_internal( const struct passwd *pw, const char* password )
 namespace Authorization {
 
 // default credential: invalid for everything, needed as a default session credential
-CredentialImpl::CredentialImpl() : mShared(false), mRight(false), mRightName(""), mGroupName(""), mUid(0), mUserName(""), mRealName(""), mCreationTime(CFAbsoluteTimeGetCurrent()), mValid(false)
+CredentialImpl::CredentialImpl() : mShared(false), mRight(false), mUid(0), mName(""), mCreationTime(CFAbsoluteTimeGetCurrent()), mValid(false)
 {
 }
 
 // only for testing whether this credential is usable
-CredentialImpl::CredentialImpl(const uid_t uid, const string &username, const string &realname, const string &groupname, bool shared) : mShared(shared), mRight(false), mRightName(""), mGroupName(groupname), mUid(uid), mUserName(username), mRealName(realname), mCreationTime(CFAbsoluteTimeGetCurrent()), mValid(true)
+CredentialImpl::CredentialImpl(const uid_t uid, const string &username, const string &realname, bool shared) : mShared(shared), mRight(false), mUid(uid), mName(username), mRealName(realname), mCreationTime(CFAbsoluteTimeGetCurrent()), mValid(true)
 {
 }
 
-CredentialImpl::CredentialImpl(const string &username, const string &password, bool shared) : mShared(shared), mRight(false), mRightName(""), mGroupName(""), mUserName(username), mCreationTime(CFAbsoluteTimeGetCurrent()), mValid(false)
+CredentialImpl::CredentialImpl(const string &username, const string &password, bool shared) : mShared(shared), mRight(false), mName(username), mCreationTime(CFAbsoluteTimeGetCurrent()), mValid(false)
 {
     Server::active().longTermActivity();
     const char *user = username.c_str();
@@ -54,7 +54,7 @@ CredentialImpl::CredentialImpl(const string &username, const string &password, b
         }
 
         mUid = pw->pw_uid;
-        mUserName = pw->pw_name;
+        mName = pw->pw_name;
         mRealName = pw->pw_gecos;
 
         const char *passwd = password.c_str();
@@ -76,7 +76,7 @@ CredentialImpl::CredentialImpl(const string &username, const string &password, b
 // least-privilege
     // @@@  arguably we don't care about the UID any more and should not
     // require it in this ctor
-CredentialImpl::CredentialImpl(const string &right, const uid_t uid, bool shared) : mShared(shared), mRight(true), mRightName(right), mGroupName(""), mUid(uid), mUserName(""), mRealName(""), mCreationTime(CFAbsoluteTimeGetCurrent()), mValid(true)
+CredentialImpl::CredentialImpl(const string &right, bool shared) : mShared(shared), mRight(true), mUid(-2), mName(right), mRealName(""), mCreationTime(CFAbsoluteTimeGetCurrent()), mValid(true)
 {
 }
 
@@ -87,32 +87,36 @@ CredentialImpl::~CredentialImpl()
 bool
 CredentialImpl::operator < (const CredentialImpl &other) const
 {
-    // Desired ordering characteristics: 
+    // all shared creds are placed into mSessionCreds
+    // all non shared creds are placed into AuthorizationToken
     //
-    // - unshared before shared
-    // - least privilege before non-least privilege
-    // - for least privilege credentials with the same sharing characteristics, 
-    //   order on the basis of right strings
-    // - orthographic order of group names
-    // 
-    // UID used to be the primary distinguishing element, but it can't be
-    // trusted--it's gathered as a side effect, potentially by an external
-    // process.  
-    //
-    // Nothing is sacred about this ordering; we just had to pick something.  
+    // There are 2 types of credentials UID and Right
+    // UID = Authenticated Identity
+    // Right = Rights which were previously authenticated by a uid credential
     
+    // Right Credentials are only used during kAuthorizationFlagLeastPrivileged 
+    // operations and should not have a valid uid set    
+
+    // this allows shared and none shared co-exist in the same container
+    // used when processing multiple rights shared vs non-shared during evaluation 
     if (!mShared && other.mShared)
         return true;
     if (!other.mShared && mShared)
         return false;
+    
+    // this allows uids and rights co-exist in the same container
+    // used when holding onto Rights inside of the AuthorizationToken
     if (mRight && !other.mRight)
         return true;
     if (!mRight && other.mRight)
         return false;
-    if (mRight && other.mRight)
-        return mRightName < other.mRightName;
-    else
-        return mGroupName < other.mGroupName;
+    
+    // this is the actual comparision
+    if (mRight) {
+        return mName < other.mName;
+    } else {
+        return mUid < other.mUid;
+    }
 }
 
 // Returns true if this CredentialImpl should be shared.
@@ -129,9 +133,9 @@ CredentialImpl::merge(const CredentialImpl &other)
     // try to ensure that the credentials are the same type
     assert(mRight == other.mRight);
     if (mRight)
-        assert(mRightName == other.mRightName);
-    else
-        assert(mGroupName == other.mGroupName);
+        assert(mName == other.mName);
+    else 
+        assert(mUid == other.mUid);
 
     if (other.mValid && (!mValid || mCreationTime < other.mCreationTime))
     {
@@ -173,8 +177,8 @@ RefPointer<CredentialImpl>(impl)
 {
 }
 
-Credential::Credential(const uid_t uid, const string &username, const string &realname, const string &groupname, bool shared) :
-RefPointer<CredentialImpl>(new CredentialImpl(uid, username, realname, groupname, shared))
+Credential::Credential(const uid_t uid, const string &username, const string &realname, bool shared) :
+RefPointer<CredentialImpl>(new CredentialImpl(uid, username, realname, shared))
 {
 }
 
@@ -182,7 +186,7 @@ Credential::Credential(const string &username, const string &password, bool shar
 {
 }
 
-Credential::Credential(const string &right, const uid_t uid, bool shared) : RefPointer<CredentialImpl>(new CredentialImpl(right, uid, shared))
+Credential::Credential(const string &right, bool shared) : RefPointer<CredentialImpl>(new CredentialImpl(right, shared))
 {
 }