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+/**
+ * @file llsecapi.h
+ * @brief Security API for services such as certificate handling
+ * secure local storage, etc.
+ *
+ * $LicenseInfo:firstyear=2009&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
+ * $/LicenseInfo$
+ */
+
+#ifndef LLSECAPI_H
+#define LLSECAPI_H
+#include <vector>
+#include <openssl/x509.h>
+#include <ostream>
+
+#ifdef LL_WINDOWS
+#pragma warning(disable:4250)
+#endif // LL_WINDOWS
+
+// All error handling is via exceptions.
+
+
+#define CERT_SUBJECT_NAME "subject_name"
+#define CERT_ISSUER_NAME "issuer_name"
+#define CERT_NAME_CN "commonName"
+
+#define CERT_SUBJECT_NAME_STRING "subject_name_string"
+#define CERT_ISSUER_NAME_STRING "issuer_name_string"
+
+#define CERT_SERIAL_NUMBER "serial_number"
+
+#define CERT_VALID_FROM "valid_from"
+#define CERT_VALID_TO "valid_to"
+#define CERT_SHA1_DIGEST "sha1_digest"
+#define CERT_MD5_DIGEST "md5_digest"
+#define CERT_HOSTNAME "hostname"
+#define CERT_BASIC_CONSTRAINTS "basicConstraints"
+#define CERT_BASIC_CONSTRAINTS_CA "CA"
+#define CERT_BASIC_CONSTRAINTS_PATHLEN "pathLen"
+
+#define CERT_KEY_USAGE "keyUsage"
+#define CERT_KU_DIGITAL_SIGNATURE "digitalSignature"
+#define CERT_KU_NON_REPUDIATION "nonRepudiation"
+#define CERT_KU_KEY_ENCIPHERMENT "keyEncipherment"
+#define CERT_KU_DATA_ENCIPHERMENT "dataEncipherment"
+#define CERT_KU_KEY_AGREEMENT "keyAgreement"
+#define CERT_KU_CERT_SIGN "certSigning"
+#define CERT_KU_CRL_SIGN "crlSigning"
+#define CERT_KU_ENCIPHER_ONLY "encipherOnly"
+#define CERT_KU_DECIPHER_ONLY "decipherOnly"
+
+#define BASIC_SECHANDLER "BASIC_SECHANDLER"
+#define CERT_VALIDATION_DATE "validation_date"
+
+#define CERT_EXTENDED_KEY_USAGE "extendedKeyUsage"
+#define CERT_EKU_SERVER_AUTH SN_server_auth
+
+#define CERT_SUBJECT_KEY_IDENTFIER "subjectKeyIdentifier"
+#define CERT_AUTHORITY_KEY_IDENTIFIER "authorityKeyIdentifier"
+#define CERT_AUTHORITY_KEY_IDENTIFIER_ID "authorityKeyIdentifierId"
+#define CERT_AUTHORITY_KEY_IDENTIFIER_NAME "authorityKeyIdentifierName"
+#define CERT_AUTHORITY_KEY_IDENTIFIER_SERIAL "authorityKeyIdentifierSerial"
+
+// validate the current time lies within
+// the validation period of the cert
+#define VALIDATION_POLICY_TIME 1
+
+// validate that the CA, or some cert in the chain
+// lies within the certificate store
+#define VALIDATION_POLICY_TRUSTED 2
+
+// validate that the subject name of
+// the cert contains the passed in hostname
+// or validates against the hostname
+#define VALIDATION_POLICY_HOSTNAME 4
+
+
+// validate that the cert contains the SSL EKU
+#define VALIDATION_POLICY_SSL_KU 8
+
+// validate that the cert contains the SSL EKU
+#define VALIDATION_POLICY_CA_KU 16
+
+#define VALIDATION_POLICY_CA_BASIC_CONSTRAINTS 32
+
+// validate that the cert is correct for SSL
+#define VALIDATION_POLICY_SSL (VALIDATION_POLICY_TIME | \
+ VALIDATION_POLICY_HOSTNAME | \
+ VALIDATION_POLICY_TRUSTED | \
+ VALIDATION_POLICY_SSL_KU | \
+ VALIDATION_POLICY_CA_BASIC_CONSTRAINTS | \
+ VALIDATION_POLICY_CA_KU)
+
+
+
+
+
+
+class LLProtectedDataException
+{
+public:
+ LLProtectedDataException(const char *msg)
+ {
+ LL_WARNS("SECAPI") << "Protected Data Error: " << (std::string)msg << LL_ENDL;
+ mMsg = (std::string)msg;
+ }
+ std::string getMessage() { return mMsg; }
+protected:
+ std::string mMsg;
+};
+
+// class LLCertificate
+// parent class providing an interface for certifiate.
+// LLCertificates are considered unmodifiable
+// Certificates are pulled out of stores, or created via
+// factory calls
+class LLCertificate : public LLRefCount
+{
+ LOG_CLASS(LLCertificate);
+public:
+ LLCertificate() {}
+
+ virtual ~LLCertificate() {}
+
+ // return a PEM encoded certificate. The encoding
+ // includes the -----BEGIN CERTIFICATE----- and end certificate elements
+ virtual std::string getPem() const=0;
+
+ // return a DER encoded certificate
+ virtual std::vector<U8> getBinary() const=0;
+
+ // return an LLSD object containing information about the certificate
+ // such as its name, signature, expiry time, serial number
+ virtual void getLLSD(LLSD& llsd)=0;
+
+ // return an openSSL X509 struct for the certificate
+ virtual X509* getOpenSSLX509() const=0;
+
+};
+
+// class LLCertificateVector
+// base class for a list of certificates.
+
+
+class LLCertificateVector : public LLRefCount
+{
+
+public:
+
+ LLCertificateVector() {};
+ virtual ~LLCertificateVector() {};
+
+ // base iterator implementation class, providing
+ // the functionality needed for the iterator class.
+ class iterator_impl : public LLRefCount
+ {
+ public:
+ iterator_impl() {};
+ virtual ~iterator_impl() {};
+ virtual void seek(bool incr)=0;
+ virtual LLPointer<iterator_impl> clone() const=0;
+ virtual bool equals(const LLPointer<iterator_impl>& _iter) const=0;
+ virtual LLPointer<LLCertificate> get()=0;
+ };
+
+ // iterator class
+ class iterator
+ {
+ public:
+ iterator(LLPointer<iterator_impl> impl) : mImpl(impl) {}
+ iterator() : mImpl(NULL) {}
+ iterator(const iterator& _iter) {mImpl = _iter.mImpl->clone(); }
+ ~iterator() {}
+ iterator& operator++() { if(mImpl.notNull()) mImpl->seek(true); return *this;}
+ iterator& operator--() { if(mImpl.notNull()) mImpl->seek(false); return *this;}
+
+ iterator operator++(int) { iterator result = *this; if(mImpl.notNull()) mImpl->seek(true); return result;}
+ iterator operator--(int) { iterator result = *this; if(mImpl.notNull()) mImpl->seek(false); return result;}
+ LLPointer<LLCertificate> operator*() { return mImpl->get(); }
+
+ LLPointer<iterator_impl> mImpl;
+ protected:
+ friend bool operator==(const LLCertificateVector::iterator& _lhs, const LLCertificateVector::iterator& _rhs);
+ bool equals(const iterator& _iter) const { return mImpl->equals(_iter.mImpl); }
+ };
+
+ // numeric indexer
+ virtual LLPointer<LLCertificate> operator[](int)=0;
+
+ // Iteration
+ virtual iterator begin()=0;
+
+ virtual iterator end()=0;
+
+ // find a cert given params
+ virtual iterator find(const LLSD& params) =0;
+
+ // return the number of certs in the store
+ virtual int size() const = 0;
+
+ // append the cert to the store. if a copy of the cert already exists in the store, it is removed first
+ virtual void add(LLPointer<LLCertificate> cert)=0;
+
+ // insert the cert to the store. if a copy of the cert already exists in the store, it is removed first
+ virtual void insert(iterator location, LLPointer<LLCertificate> cert)=0;
+
+ // remove a certificate from the store
+ virtual LLPointer<LLCertificate> erase(iterator cert)=0;
+};
+
+// class LLCertificateChain
+// Class representing a chain of certificates in order, with the
+// first element being the child cert.
+class LLCertificateChain : virtual public LLCertificateVector
+{
+
+public:
+ LLCertificateChain() {}
+
+ virtual ~LLCertificateChain() {}
+
+};
+
+// class LLCertificateStore
+// represents a store of certificates, typically a store of root CA
+// certificates. The store can be persisted, and can be used to validate
+// a cert chain
+//
+class LLCertificateStore : virtual public LLCertificateVector
+{
+
+public:
+
+ LLCertificateStore() {}
+ virtual ~LLCertificateStore() {}
+
+ // persist the store
+ virtual void save()=0;
+
+ // return the store id
+ virtual std::string storeId() const=0;
+
+ // validate a certificate chain given the params.
+ // Will throw exceptions on error
+
+ virtual void validate(int validation_policy,
+ LLPointer<LLCertificateChain> cert_chain,
+ const LLSD& validation_params) =0;
+
+};
+
+
+inline
+bool operator==(const LLCertificateVector::iterator& _lhs, const LLCertificateVector::iterator& _rhs)
+{
+ return _lhs.equals(_rhs);
+}
+inline
+bool operator!=(const LLCertificateVector::iterator& _lhs, const LLCertificateVector::iterator& _rhs)
+{
+ return !(_lhs == _rhs);
+}
+
+
+#define CRED_IDENTIFIER_TYPE_ACCOUNT "account"
+#define CRED_IDENTIFIER_TYPE_AGENT "agent"
+#define CRED_AUTHENTICATOR_TYPE_CLEAR "clear"
+#define CRED_AUTHENTICATOR_TYPE_HASH "hash"
+//
+// LLCredential - interface for credentials providing the following functionality:
+// * persistance of credential information based on grid (for saving username/password)
+// * serialization to an OGP identifier/authenticator pair
+//
+class LLCredential : public LLRefCount
+{
+public:
+
+ LLCredential() {}
+
+ LLCredential(const std::string& grid)
+ {
+ mGrid = grid;
+ mIdentifier = LLSD::emptyMap();
+ mAuthenticator = LLSD::emptyMap();
+ }
+
+ virtual ~LLCredential() {}
+
+ virtual void setCredentialData(const LLSD& identifier, const LLSD& authenticator)
+ {
+ mIdentifier = identifier;
+ mAuthenticator = authenticator;
+ }
+ virtual LLSD getIdentifier() { return mIdentifier; }
+ virtual void identifierType(std::string& idType);
+ virtual LLSD getAuthenticator() { return mAuthenticator; }
+ virtual void authenticatorType(std::string& authType);
+ virtual LLSD getLoginParams();
+ virtual std::string getGrid() { return mGrid; }
+
+
+ virtual void clearAuthenticator() { mAuthenticator = LLSD(); }
+ virtual std::string userID() const { return std::string("unknown");}
+ virtual std::string asString() const { return std::string("unknown");}
+ operator std::string() const { return asString(); }
+protected:
+ LLSD mIdentifier;
+ LLSD mAuthenticator;
+ std::string mGrid;
+};
+
+std::ostream& operator <<(std::ostream& s, const LLCredential& cred);
+
+
+// All error handling is via exceptions.
+
+class LLCertException
+{
+public:
+ LLCertException(LLPointer<LLCertificate> cert, const char* msg)
+ {
+
+ mCert = cert;
+
+ LL_WARNS("SECAPI") << "Certificate Error: " << (std::string)msg << LL_ENDL;
+ mMsg = (std::string)msg;
+ }
+ LLPointer<LLCertificate> getCert() { return mCert; }
+ std::string getMessage() { return mMsg; }
+protected:
+ LLPointer<LLCertificate> mCert;
+ std::string mMsg;
+};
+
+class LLInvalidCertificate : public LLCertException
+{
+public:
+ LLInvalidCertificate(LLPointer<LLCertificate> cert) : LLCertException(cert, "CertInvalid")
+ {
+ }
+protected:
+};
+
+class LLCertValidationTrustException : public LLCertException
+{
+public:
+ LLCertValidationTrustException(LLPointer<LLCertificate> cert) : LLCertException(cert, "CertUntrusted")
+ {
+ }
+protected:
+};
+
+class LLCertValidationHostnameException : public LLCertException
+{
+public:
+ LLCertValidationHostnameException(std::string hostname,
+ LLPointer<LLCertificate> cert) : LLCertException(cert, "CertInvalidHostname")
+ {
+ mHostname = hostname;
+ }
+
+ std::string getHostname() { return mHostname; }
+protected:
+ std::string mHostname;
+};
+
+class LLCertValidationExpirationException : public LLCertException
+{
+public:
+ LLCertValidationExpirationException(LLPointer<LLCertificate> cert,
+ LLDate current_time) : LLCertException(cert, "CertExpired")
+ {
+ mTime = current_time;
+ }
+ LLDate GetTime() { return mTime; }
+protected:
+ LLDate mTime;
+};
+
+class LLCertKeyUsageValidationException : public LLCertException
+{
+public:
+ LLCertKeyUsageValidationException(LLPointer<LLCertificate> cert) : LLCertException(cert, "CertKeyUsage")
+ {
+ }
+protected:
+};
+
+class LLCertBasicConstraintsValidationException : public LLCertException
+{
+public:
+ LLCertBasicConstraintsValidationException(LLPointer<LLCertificate> cert) : LLCertException(cert, "CertBasicConstraints")
+ {
+ }
+protected:
+};
+
+class LLCertValidationInvalidSignatureException : public LLCertException
+{
+public:
+ LLCertValidationInvalidSignatureException(LLPointer<LLCertificate> cert) : LLCertException(cert, "CertInvalidSignature")
+ {
+ }
+protected:
+};
+
+// LLSecAPIHandler Class
+// Interface handler class for the various security storage handlers.
+class LLSecAPIHandler : public LLRefCount
+{
+public:
+
+
+ LLSecAPIHandler() {}
+ virtual ~LLSecAPIHandler() {}
+
+ // initialize the SecAPIHandler
+ virtual void init() {};
+
+ // instantiate a certificate from a pem string
+ virtual LLPointer<LLCertificate> getCertificate(const std::string& pem_cert)=0;
+
+
+
+ // instiate a certificate from an openssl X509 structure
+ virtual LLPointer<LLCertificate> getCertificate(X509* openssl_cert)=0;
+
+ // instantiate a chain from an X509_STORE_CTX
+ virtual LLPointer<LLCertificateChain> getCertificateChain(const X509_STORE_CTX* chain)=0;
+
+ // instantiate a cert store given it's id. if a persisted version
+ // exists, it'll be loaded. If not, one will be created (but not
+ // persisted)
+ virtual LLPointer<LLCertificateStore> getCertificateStore(const std::string& store_id)=0;
+
+ // persist data in a protected store
+ virtual void setProtectedData(const std::string& data_type,
+ const std::string& data_id,
+ const LLSD& data)=0;
+
+ // retrieve protected data
+ virtual LLSD getProtectedData(const std::string& data_type,
+ const std::string& data_id)=0;
+
+ // delete a protected data item from the store
+ virtual void deleteProtectedData(const std::string& data_type,
+ const std::string& data_id)=0;
+
+ virtual LLPointer<LLCredential> createCredential(const std::string& grid,
+ const LLSD& identifier,
+ const LLSD& authenticator)=0;
+
+ virtual LLPointer<LLCredential> loadCredential(const std::string& grid)=0;
+
+ virtual void saveCredential(LLPointer<LLCredential> cred, bool save_authenticator)=0;
+
+ virtual void deleteCredential(LLPointer<LLCredential> cred)=0;
+
+};
+
+void initializeSecHandler();
+
+// retrieve a security api depending on the api type
+LLPointer<LLSecAPIHandler> getSecHandler(const std::string& handler_type);
+
+void registerSecHandler(const std::string& handler_type,
+ LLPointer<LLSecAPIHandler>& handler);
+
+extern LLPointer<LLSecAPIHandler> gSecAPIHandler;
+
+
+int secapiSSLCertVerifyCallback(X509_STORE_CTX *ctx, void *param);
+
+
+#endif // LL_SECAPI_H
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