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Diffstat (limited to 'indra/newview/llsechandler_basic.cpp')
| -rw-r--r-- | indra/newview/llsechandler_basic.cpp | 1660 |
1 files changed, 1660 insertions, 0 deletions
diff --git a/indra/newview/llsechandler_basic.cpp b/indra/newview/llsechandler_basic.cpp new file mode 100644 index 0000000000..90e8ff0aae --- /dev/null +++ b/indra/newview/llsechandler_basic.cpp @@ -0,0 +1,1660 @@ +/** + * @file llsechandler_basic.cpp + * @brief Security API for services such as certificate handling + * secure local storage, etc. + * + * $LicenseInfo:firstyear=2003&license=viewerlgpl$ + * 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 + * $/LicenseInfo$ + */ + + +#include "llviewerprecompiledheaders.h" +#include "llsecapi.h" +#include "llsechandler_basic.h" +#include "llsdserialize.h" +#include "llviewernetwork.h" +#include "llxorcipher.h" +#include "llfile.h" +#include "lldir.h" +#include "llviewercontrol.h" +#include <vector> +#include <ios> +#include <openssl/ossl_typ.h> +#include <openssl/x509.h> +#include <openssl/x509v3.h> +#include <openssl/pem.h> +#include <openssl/asn1.h> +#include <openssl/rand.h> +#include <openssl/err.h> +#include <iostream> +#include <iomanip> +#include <time.h> +#include "llmachineid.h" + + + +// 128 bits of salt data... +#define STORE_SALT_SIZE 16 +#define BUFFER_READ_SIZE 256 +std::string cert_string_from_asn1_string(ASN1_STRING* value); +std::string cert_string_from_octet_string(ASN1_OCTET_STRING* value); + +LLSD _basic_constraints_ext(X509* cert); +LLSD _key_usage_ext(X509* cert); +LLSD _ext_key_usage_ext(X509* cert); +LLSD _subject_key_identifier_ext(X509 *cert); +LLSD _authority_key_identifier_ext(X509* cert); + +LLBasicCertificate::LLBasicCertificate(const std::string& pem_cert) +{ + + // BIO_new_mem_buf returns a read only bio, but takes a void* which isn't const + // so we need to cast it. + BIO * pem_bio = BIO_new_mem_buf((void*)pem_cert.c_str(), pem_cert.length()); + if(pem_bio == NULL) + { + LL_WARNS("SECAPI") << "Could not allocate an openssl memory BIO." << LL_ENDL; + throw LLInvalidCertificate(this); + } + mCert = NULL; + PEM_read_bio_X509(pem_bio, &mCert, 0, NULL); + BIO_free(pem_bio); + if (!mCert) + { + throw LLInvalidCertificate(this); + } +} + + +LLBasicCertificate::LLBasicCertificate(X509* pCert) +{ + if (!pCert || !pCert->cert_info) + { + throw LLInvalidCertificate(this); + } + mCert = X509_dup(pCert); +} + +LLBasicCertificate::~LLBasicCertificate() +{ + if(mCert) + { + X509_free(mCert); + } +} + +// +// retrieve the pem using the openssl functionality +std::string LLBasicCertificate::getPem() const +{ + char * pem_bio_chars = NULL; + // a BIO is the equivalent of a 'std::stream', and + // can be a file, mem stream, whatever. Grab a memory based + // BIO for the result + BIO *pem_bio = BIO_new(BIO_s_mem()); + if (!pem_bio) + { + LL_WARNS("SECAPI") << "Could not allocate an openssl memory BIO." << LL_ENDL; + return std::string(); + } + PEM_write_bio_X509(pem_bio, mCert); + int length = BIO_get_mem_data(pem_bio, &pem_bio_chars); + std::string result = std::string(pem_bio_chars, length); + BIO_free(pem_bio); + return result; +} + +// get the DER encoding for the cert +// DER is a binary encoding format for certs... +std::vector<U8> LLBasicCertificate::getBinary() const +{ + U8 * der_bio_data = NULL; + // get a memory bio + BIO *der_bio = BIO_new(BIO_s_mem()); + if (!der_bio) + { + LL_WARNS("SECAPI") << "Could not allocate an openssl memory BIO." << LL_ENDL; + return std::vector<U8>(); + } + i2d_X509_bio(der_bio, mCert); + int length = BIO_get_mem_data(der_bio, &der_bio_data); + std::vector<U8> result(length); + // vectors are guranteed to be a contiguous chunk of memory. + memcpy(&result[0], der_bio_data, length); + BIO_free(der_bio); + return result; +} + + +void LLBasicCertificate::getLLSD(LLSD &llsd) +{ + if (mLLSDInfo.isUndefined()) + { + _initLLSD(); + } + llsd = mLLSDInfo; +} + +// Initialize the LLSD info for the certificate +LLSD& LLBasicCertificate::_initLLSD() +{ + + // call the various helpers to build the LLSD + mLLSDInfo[CERT_SUBJECT_NAME] = cert_name_from_X509_NAME(X509_get_subject_name(mCert)); + mLLSDInfo[CERT_ISSUER_NAME] = cert_name_from_X509_NAME(X509_get_issuer_name(mCert)); + mLLSDInfo[CERT_SUBJECT_NAME_STRING] = cert_string_name_from_X509_NAME(X509_get_subject_name(mCert)); + mLLSDInfo[CERT_ISSUER_NAME_STRING] = cert_string_name_from_X509_NAME(X509_get_issuer_name(mCert)); + ASN1_INTEGER *sn = X509_get_serialNumber(mCert); + if (sn != NULL) + { + mLLSDInfo[CERT_SERIAL_NUMBER] = cert_string_from_asn1_integer(sn); + } + + mLLSDInfo[CERT_VALID_TO] = cert_date_from_asn1_time(X509_get_notAfter(mCert)); + mLLSDInfo[CERT_VALID_FROM] = cert_date_from_asn1_time(X509_get_notBefore(mCert)); + mLLSDInfo[CERT_SHA1_DIGEST] = cert_get_digest("sha1", mCert); + mLLSDInfo[CERT_MD5_DIGEST] = cert_get_digest("md5", mCert); + // add the known extensions + mLLSDInfo[CERT_BASIC_CONSTRAINTS] = _basic_constraints_ext(mCert); + mLLSDInfo[CERT_KEY_USAGE] = _key_usage_ext(mCert); + mLLSDInfo[CERT_EXTENDED_KEY_USAGE] = _ext_key_usage_ext(mCert); + mLLSDInfo[CERT_SUBJECT_KEY_IDENTFIER] = _subject_key_identifier_ext(mCert); + mLLSDInfo[CERT_AUTHORITY_KEY_IDENTIFIER] = _authority_key_identifier_ext(mCert); + return mLLSDInfo; +} + +// Retrieve the basic constraints info +LLSD _basic_constraints_ext(X509* cert) +{ + LLSD result; + BASIC_CONSTRAINTS *bs = (BASIC_CONSTRAINTS *)X509_get_ext_d2i(cert, NID_basic_constraints, NULL, NULL); + if(bs) + { + result = LLSD::emptyMap(); + // Determines whether the cert can be used as a CA + result[CERT_BASIC_CONSTRAINTS_CA] = (bool)bs->ca; + + if(bs->pathlen) + { + // the pathlen determines how deep a certificate chain can be from + // this CA + if((bs->pathlen->type == V_ASN1_NEG_INTEGER) + || !bs->ca) + { + result[CERT_BASIC_CONSTRAINTS_PATHLEN] = 0; + } + else + { + result[CERT_BASIC_CONSTRAINTS_PATHLEN] = (int)ASN1_INTEGER_get(bs->pathlen); + } + } + + } + return result; +} + +// retrieve the key usage, which specifies how the cert can be used. +// +LLSD _key_usage_ext(X509* cert) +{ + LLSD result; + ASN1_STRING *usage_str = (ASN1_STRING *)X509_get_ext_d2i(cert, NID_key_usage, NULL, NULL); + if(usage_str) + { + result = LLSD::emptyArray(); + long usage = 0; + if(usage_str->length > 0) + { + usage = usage_str->data[0]; + if(usage_str->length > 1) + { + usage |= usage_str->data[1] << 8; + } + } + ASN1_STRING_free(usage_str); + if(usage) + { + if(usage & KU_DIGITAL_SIGNATURE) result.append(LLSD((std::string)CERT_KU_DIGITAL_SIGNATURE)); + if(usage & KU_NON_REPUDIATION) result.append(LLSD((std::string)CERT_KU_NON_REPUDIATION)); + if(usage & KU_KEY_ENCIPHERMENT) result.append(LLSD((std::string)CERT_KU_KEY_ENCIPHERMENT)); + if(usage & KU_DATA_ENCIPHERMENT) result.append(LLSD((std::string)CERT_KU_DATA_ENCIPHERMENT)); + if(usage & KU_KEY_AGREEMENT) result.append(LLSD((std::string)CERT_KU_KEY_AGREEMENT)); + if(usage & KU_KEY_CERT_SIGN) result.append(LLSD((std::string)CERT_KU_CERT_SIGN)); + if(usage & KU_CRL_SIGN) result.append(LLSD((std::string)CERT_KU_CRL_SIGN)); + if(usage & KU_ENCIPHER_ONLY) result.append(LLSD((std::string)CERT_KU_ENCIPHER_ONLY)); + if(usage & KU_DECIPHER_ONLY) result.append(LLSD((std::string)CERT_KU_DECIPHER_ONLY)); + } + } + return result; +} + +// retrieve the extended key usage for the cert +LLSD _ext_key_usage_ext(X509* cert) +{ + LLSD result; + EXTENDED_KEY_USAGE *eku = (EXTENDED_KEY_USAGE *)X509_get_ext_d2i(cert, NID_ext_key_usage, NULL, NULL); + if(eku) + { + result = LLSD::emptyArray(); + while(sk_ASN1_OBJECT_num(eku)) + { + ASN1_OBJECT *usage = sk_ASN1_OBJECT_pop(eku); + if(usage) + { + int nid = OBJ_obj2nid(usage); + if (nid) + { + std::string sn = OBJ_nid2sn(nid); + result.append(sn); + } + ASN1_OBJECT_free(usage); + } + } + } + return result; +} + +// retrieve the subject key identifier of the cert +LLSD _subject_key_identifier_ext(X509 *cert) +{ + LLSD result; + ASN1_OCTET_STRING *skeyid = (ASN1_OCTET_STRING *)X509_get_ext_d2i(cert, NID_subject_key_identifier, NULL, NULL); + if(skeyid) + { + result = cert_string_from_octet_string(skeyid); + } + return result; +} + +// retrieve the authority key identifier of the cert +LLSD _authority_key_identifier_ext(X509* cert) +{ + LLSD result; + AUTHORITY_KEYID *akeyid = (AUTHORITY_KEYID *)X509_get_ext_d2i(cert, NID_authority_key_identifier, NULL, NULL); + if(akeyid) + { + result = LLSD::emptyMap(); + if(akeyid->keyid) + { + result[CERT_AUTHORITY_KEY_IDENTIFIER_ID] = cert_string_from_octet_string(akeyid->keyid); + } + if(akeyid->serial) + { + result[CERT_AUTHORITY_KEY_IDENTIFIER_SERIAL] = cert_string_from_asn1_integer(akeyid->serial); + } + } + + // we ignore the issuer name in the authority key identifier, we check the issue name via + // the the issuer name entry in the cert. + + + return result; +} + +// retrieve an openssl x509 object, +// which must be freed by X509_free +X509* LLBasicCertificate::getOpenSSLX509() const +{ + return X509_dup(mCert); +} + +// generate a single string containing the subject or issuer +// name of the cert. +std::string cert_string_name_from_X509_NAME(X509_NAME* name) +{ + char * name_bio_chars = NULL; + // get a memory bio + BIO *name_bio = BIO_new(BIO_s_mem()); + // stream the name into the bio. The name will be in the 'short name' format + X509_NAME_print_ex(name_bio, name, 0, XN_FLAG_RFC2253); + int length = BIO_get_mem_data(name_bio, &name_bio_chars); + std::string result = std::string(name_bio_chars, length); + BIO_free(name_bio); + return result; +} + +// generate an LLSD from a certificate name (issuer or subject name). +// the name will be strings indexed by the 'long form' +LLSD cert_name_from_X509_NAME(X509_NAME* name) +{ + LLSD result = LLSD::emptyMap(); + int name_entries = X509_NAME_entry_count(name); + for (int entry_index=0; entry_index < name_entries; entry_index++) + { + char buffer[32]; + X509_NAME_ENTRY *entry = X509_NAME_get_entry(name, entry_index); + + std::string name_value = std::string((const char*)M_ASN1_STRING_data(X509_NAME_ENTRY_get_data(entry)), + M_ASN1_STRING_length(X509_NAME_ENTRY_get_data(entry))); + + ASN1_OBJECT* name_obj = X509_NAME_ENTRY_get_object(entry); + OBJ_obj2txt(buffer, sizeof(buffer), name_obj, 0); + std::string obj_buffer_str = std::string(buffer); + result[obj_buffer_str] = name_value; + } + + return result; +} + +// Generate a string from an ASN1 integer. ASN1 Integers are +// bignums, so they can be 'infinitely' long, therefore we +// cannot simply use a conversion to U64 or something. +// We retrieve as a readable string for UI + +std::string cert_string_from_asn1_integer(ASN1_INTEGER* value) +{ + std::string result; + BIGNUM *bn = ASN1_INTEGER_to_BN(value, NULL); + if(bn) + { + char * ascii_bn = BN_bn2hex(bn); + + if(ascii_bn) + { + result = ascii_bn; + OPENSSL_free(ascii_bn); + } + BN_free(bn); + } + return result; +} + +// Generate a string from an OCTET string. +// we retrieve as a + +std::string cert_string_from_octet_string(ASN1_OCTET_STRING* value) +{ + + std::stringstream result; + result << std::hex << std::setprecision(2); + for (int i=0; i < value->length; i++) + { + if (i != 0) + { + result << ":"; + } + result << std::setfill('0') << std::setw(2) << (int)value->data[i]; + } + return result.str(); +} + +// Generate a string from an ASN1 integer. ASN1 Integers are +// bignums, so they can be 'infinitely' long, therefore we +// cannot simply use a conversion to U64 or something. +// We retrieve as a readable string for UI + +std::string cert_string_from_asn1_string(ASN1_STRING* value) +{ + char * string_bio_chars = NULL; + std::string result; + // get a memory bio + BIO *string_bio = BIO_new(BIO_s_mem()); + if(!string_bio) + { + // stream the name into the bio. The name will be in the 'short name' format + ASN1_STRING_print_ex(string_bio, value, ASN1_STRFLGS_RFC2253); + int length = BIO_get_mem_data(string_bio, &string_bio_chars); + result = std::string(string_bio_chars, length); + BIO_free(string_bio); + } + else + { + LL_WARNS("SECAPI") << "Could not allocate an openssl memory BIO." << LL_ENDL; + } + + return result; +} + +// retrieve a date structure from an ASN1 time, for +// validity checking. +LLDate cert_date_from_asn1_time(ASN1_TIME* asn1_time) +{ + + struct tm timestruct = {0}; + int i = asn1_time->length; + + if (i < 10) + { + return LLDate(); + } + // convert the date from the ASN1 time (which is a string in ZULU time), to + // a timeval. + timestruct.tm_year = (asn1_time->data[0]-'0') * 10 + (asn1_time->data[1]-'0'); + + /* Deal with Year 2000 */ + if (timestruct.tm_year < 70) + timestruct.tm_year += 100; + + timestruct.tm_mon = (asn1_time->data[2]-'0') * 10 + (asn1_time->data[3]-'0') - 1; + timestruct.tm_mday = (asn1_time->data[4]-'0') * 10 + (asn1_time->data[5]-'0'); + timestruct.tm_hour = (asn1_time->data[6]-'0') * 10 + (asn1_time->data[7]-'0'); + timestruct.tm_min = (asn1_time->data[8]-'0') * 10 + (asn1_time->data[9]-'0'); + timestruct.tm_sec = (asn1_time->data[10]-'0') * 10 + (asn1_time->data[11]-'0'); + +#if LL_WINDOWS + return LLDate((F64)_mkgmtime(×truct)); +#else // LL_WINDOWS + return LLDate((F64)timegm(×truct)); +#endif // LL_WINDOWS +} + + +// Generate a string containing a digest. The digest time is 'ssh1' or +// 'md5', and the resulting string is of the form "aa:12:5c:' and so on +std::string cert_get_digest(const std::string& digest_type, X509 *cert) +{ + unsigned char digest_data[BUFFER_READ_SIZE]; + unsigned int len = sizeof(digest_data); + std::stringstream result; + const EVP_MD* digest = NULL; + // we could use EVP_get_digestbyname, but that requires initializer code which + // would require us to complicate things by plumbing it into the system. + if (digest_type == "md5") + { + digest = EVP_md5(); + } + else if (digest_type == "sha1") + { + digest = EVP_sha1(); + } + else + { + return std::string(); + } + + X509_digest(cert, digest, digest_data, &len); + result << std::hex << std::setprecision(2); + for (unsigned int i=0; i < len; i++) + { + if (i != 0) + { + result << ":"; + } + result << std::setfill('0') << std::setw(2) << (int)digest_data[i]; + } + return result.str(); +} + + +// class LLBasicCertificateVector +// This class represents a list of certificates, implemented by a vector of certificate pointers. +// it contains implementations of the virtual functions for iterators, search, add, remove, etc. +// + +// Find a certificate in the list. +// It will find a cert that has minimally the params listed, with the values being the same +LLBasicCertificateVector::iterator LLBasicCertificateVector::find(const LLSD& params) +{ + BOOL found = FALSE; + // loop through the entire vector comparing the values in the certs + // against those passed in via the params. + // params should be a map. Only the items specified in the map will be + // checked, but they must match exactly, even if they're maps or arrays. + + for(iterator cert = begin(); + cert != end(); + cert++) + { + + found= TRUE; + LLSD cert_info; + (*cert)->getLLSD(cert_info); + for (LLSD::map_const_iterator param = params.beginMap(); + param != params.endMap(); + param++) + { + + if (!cert_info.has((std::string)param->first) || + (!valueCompareLLSD(cert_info[(std::string)param->first], param->second))) + { + found = FALSE; + break; + } + } + if (found) + { + return (cert); + } + } + return end(); +} + +// Insert a certificate into the store. If the certificate already +// exists in the store, nothing is done. +void LLBasicCertificateVector::insert(iterator _iter, + LLPointer<LLCertificate> cert) +{ + LLSD cert_info; + cert->getLLSD(cert_info); + if (cert_info.isMap() && cert_info.has(CERT_SHA1_DIGEST)) + { + LLSD existing_cert_info = LLSD::emptyMap(); + existing_cert_info[CERT_MD5_DIGEST] = cert_info[CERT_MD5_DIGEST]; + if(find(existing_cert_info) == end()) + { + BasicIteratorImpl *basic_iter = dynamic_cast<BasicIteratorImpl*>(_iter.mImpl.get()); + llassert(basic_iter); + if (basic_iter) + { + mCerts.insert(basic_iter->mIter, cert); + } + } + } +} + +// remove a certificate from the store +LLPointer<LLCertificate> LLBasicCertificateVector::erase(iterator _iter) +{ + + if (_iter != end()) + { + BasicIteratorImpl *basic_iter = dynamic_cast<BasicIteratorImpl*>(_iter.mImpl.get()); + LLPointer<LLCertificate> result = (*_iter); + mCerts.erase(basic_iter->mIter); + return result; + } + return NULL; +} + + +// +// LLBasicCertificateStore +// This class represents a store of CA certificates. The basic implementation +// uses a pem file such as the legacy CA.pem stored in the existing +// SL implementation. +LLBasicCertificateStore::LLBasicCertificateStore(const std::string& filename) +{ + mFilename = filename; + load_from_file(filename); +} + +void LLBasicCertificateStore::load_from_file(const std::string& filename) +{ + // scan the PEM file extracting each certificate + if (!LLFile::isfile(filename)) + { + return; + } + + BIO* file_bio = BIO_new(BIO_s_file()); + if(file_bio) + { + if (BIO_read_filename(file_bio, filename.c_str()) > 0) + { + X509 *cert_x509 = NULL; + while((PEM_read_bio_X509(file_bio, &cert_x509, 0, NULL)) && + (cert_x509 != NULL)) + { + try + { + add(new LLBasicCertificate(cert_x509)); + } + catch (...) + { + LL_WARNS("SECAPI") << "Failure creating certificate from the certificate store file." << LL_ENDL; + } + X509_free(cert_x509); + cert_x509 = NULL; + } + BIO_free(file_bio); + } + } + else + { + LL_WARNS("SECAPI") << "Could not allocate a file BIO" << LL_ENDL; + } +} + + +LLBasicCertificateStore::~LLBasicCertificateStore() +{ +} + + +// persist the store +void LLBasicCertificateStore::save() +{ + llofstream file_store(mFilename, llofstream::binary); + if(!file_store.fail()) + { + for(iterator cert = begin(); + cert != end(); + cert++) + { + std::string pem = (*cert)->getPem(); + if(!pem.empty()) + { + file_store << (*cert)->getPem() << std::endl; + } + } + file_store.close(); + } + else + { + LL_WARNS("SECAPI") << "Could not open certificate store " << mFilename << "for save" << LL_ENDL; + } +} + +// return the store id +std::string LLBasicCertificateStore::storeId() const +{ + // this is the basic handler which uses the CA.pem store, + // so we ignore this. + return std::string(""); +} + + +// +// LLBasicCertificateChain +// This class represents a chain of certs, each cert being signed by the next cert +// in the chain. Certs must be properly signed by the parent +LLBasicCertificateChain::LLBasicCertificateChain(const X509_STORE_CTX* store) +{ + + // we're passed in a context, which contains a cert, and a blob of untrusted + // certificates which compose the chain. + if((store == NULL) || (store->cert == NULL)) + { + LL_WARNS("SECAPI") << "An invalid store context was passed in when trying to create a certificate chain" << LL_ENDL; + return; + } + // grab the child cert + LLPointer<LLCertificate> current = new LLBasicCertificate(store->cert); + + add(current); + if(store->untrusted != NULL) + { + // if there are other certs in the chain, we build up a vector + // of untrusted certs so we can search for the parents of each + // consecutive cert. + LLBasicCertificateVector untrusted_certs; + for(int i = 0; i < sk_X509_num(store->untrusted); i++) + { + LLPointer<LLCertificate> cert = new LLBasicCertificate(sk_X509_value(store->untrusted, i)); + untrusted_certs.add(cert); + + } + while(untrusted_certs.size() > 0) + { + LLSD find_data = LLSD::emptyMap(); + LLSD cert_data; + current->getLLSD(cert_data); + // we simply build the chain via subject/issuer name as the + // client should not have passed in multiple CA's with the same + // subject name. If they did, it'll come out in the wash during + // validation. + find_data[CERT_SUBJECT_NAME_STRING] = cert_data[CERT_ISSUER_NAME_STRING]; + LLBasicCertificateVector::iterator issuer = untrusted_certs.find(find_data); + if (issuer != untrusted_certs.end()) + { + current = untrusted_certs.erase(issuer); + add(current); + } + else + { + break; + } + } + } +} + + +// subdomain wildcard specifiers can be divided into 3 parts +// the part before the first *, the part after the first * but before +// the second *, and the part after the second *. +// It then iterates over the second for each place in the string +// that it matches. ie if the subdomain was testfoofoobar, and +// the wildcard was test*foo*bar, it would match test, then +// recursively match foofoobar and foobar + +bool _cert_subdomain_wildcard_match(const std::string& subdomain, + const std::string& wildcard) +{ + // split wildcard into the portion before the *, and the portion after + + int wildcard_pos = wildcard.find_first_of('*'); + // check the case where there is no wildcard. + if(wildcard_pos == wildcard.npos) + { + return (subdomain == wildcard); + } + + // we need to match the first part of the subdomain string up to the wildcard + // position + if(subdomain.substr(0, wildcard_pos) != wildcard.substr(0, wildcard_pos)) + { + // the first portions of the strings didn't match + return FALSE; + } + + // as the portion of the wildcard string before the * matched, we need to check the + // portion afterwards. Grab that portion. + std::string new_wildcard_string = wildcard.substr( wildcard_pos+1, wildcard.npos); + if(new_wildcard_string.empty()) + { + // we had nothing after the *, so it's an automatic match + return TRUE; + } + + // grab the portion of the remaining wildcard string before the next '*'. We need to find this + // within the remaining subdomain string. and then recursively check. + std::string new_wildcard_match_string = new_wildcard_string.substr(0, new_wildcard_string.find_first_of('*')); + + // grab the portion of the subdomain after the part that matched the initial wildcard portion + std::string new_subdomain = subdomain.substr(wildcard_pos, subdomain.npos); + + // iterate through the current subdomain, finding instances of the match string. + int sub_pos = new_subdomain.find_first_of(new_wildcard_match_string); + while(sub_pos != std::string::npos) + { + new_subdomain = new_subdomain.substr(sub_pos, std::string::npos); + if(_cert_subdomain_wildcard_match(new_subdomain, new_wildcard_string)) + { + return TRUE; + } + sub_pos = new_subdomain.find_first_of(new_wildcard_match_string, 1); + + + } + // didn't find any instances of the match string that worked in the subdomain, so fail. + return FALSE; +} + + +// RFC2459 does not address wildcards as part of it's name matching +// specification, and there is no RFC specifying wildcard matching, +// RFC2818 does a few statements about wildcard matching, but is very +// general. Generally, wildcard matching is per implementation, although +// it's pretty similar. +// in our case, we use the '*' wildcard character only, within each +// subdomain. The hostname and the CN specification should have the +// same number of subdomains. +// We then iterate that algorithm over each subdomain. +bool _cert_hostname_wildcard_match(const std::string& hostname, const std::string& common_name) +{ + std::string new_hostname = hostname; + std::string new_cn = common_name; + + // find the last '.' in the hostname and the match name. + int subdomain_pos = new_hostname.find_last_of('.'); + int subcn_pos = new_cn.find_last_of('.'); + + // if the last char is a '.', strip it + if(subdomain_pos == (new_hostname.length()-1)) + { + new_hostname = new_hostname.substr(0, subdomain_pos); + subdomain_pos = new_hostname.find_last_of('.'); + } + if(subcn_pos == (new_cn.length()-1)) + { + new_cn = new_cn.substr(0, subcn_pos); + subcn_pos = new_cn.find_last_of('.'); + } + + // Check to see if there are any further '.' in the string. + while((subcn_pos != std::string::npos) && (subdomain_pos != std::string::npos)) + { + // snip out last subdomain in both the match string and the hostname + // The last bit for 'my.current.host.com' would be 'com' + std::string cn_part = new_cn.substr(subcn_pos+1, std::string::npos); + std::string hostname_part = new_hostname.substr(subdomain_pos+1, std::string::npos); + + if(!_cert_subdomain_wildcard_match(new_hostname.substr(subdomain_pos+1, std::string::npos), + cn_part)) + { + return FALSE; + } + new_hostname = new_hostname.substr(0, subdomain_pos); + new_cn = new_cn.substr(0, subcn_pos); + subdomain_pos = new_hostname.find_last_of('.'); + subcn_pos = new_cn.find_last_of('.'); + } + // check to see if the most significant portion of the common name is '*'. If so, we can + // simply return success as child domains are also matched. + if(new_cn == "*") + { + // if it's just a '*' we support all child domains as well, so '*. + return TRUE; + } + + return _cert_subdomain_wildcard_match(new_hostname, new_cn); + +} + +// validate that the LLSD array in llsd_set contains the llsd_value +bool _LLSDArrayIncludesValue(const LLSD& llsd_set, LLSD llsd_value) +{ + for(LLSD::array_const_iterator set_value = llsd_set.beginArray(); + set_value != llsd_set.endArray(); + set_value++) + { + if(valueCompareLLSD((*set_value), llsd_value)) + { + return TRUE; + } + } + return FALSE; +} + +void _validateCert(int validation_policy, + LLPointer<LLCertificate> cert, + const LLSD& validation_params, + int depth) +{ + + LLSD current_cert_info; + cert->getLLSD(current_cert_info); + // check basic properties exist in the cert + if(!current_cert_info.has(CERT_SUBJECT_NAME) || !current_cert_info.has(CERT_SUBJECT_NAME_STRING)) + { + throw LLCertException(cert, "Cert doesn't have a Subject Name"); + } + + if(!current_cert_info.has(CERT_ISSUER_NAME_STRING)) + { + throw LLCertException(cert, "Cert doesn't have an Issuer Name"); + } + + // check basic properties exist in the cert + if(!current_cert_info.has(CERT_VALID_FROM) || !current_cert_info.has(CERT_VALID_TO)) + { + throw LLCertException(cert, "Cert doesn't have an expiration period"); + } + if (!current_cert_info.has(CERT_SHA1_DIGEST)) + { + throw LLCertException(cert, "No SHA1 digest"); + } + + if (validation_policy & VALIDATION_POLICY_TIME) + { + + LLDate validation_date(time(NULL)); + if(validation_params.has(CERT_VALIDATION_DATE)) + { + validation_date = validation_params[CERT_VALIDATION_DATE]; + } + + if((validation_date < current_cert_info[CERT_VALID_FROM].asDate()) || + (validation_date > current_cert_info[CERT_VALID_TO].asDate())) + { + throw LLCertValidationExpirationException(cert, validation_date); + } + } + if (validation_policy & VALIDATION_POLICY_SSL_KU) + { + if (current_cert_info.has(CERT_KEY_USAGE) && current_cert_info[CERT_KEY_USAGE].isArray() && + (!(_LLSDArrayIncludesValue(current_cert_info[CERT_KEY_USAGE], + LLSD((std::string)CERT_KU_DIGITAL_SIGNATURE))) || + !(_LLSDArrayIncludesValue(current_cert_info[CERT_KEY_USAGE], + LLSD((std::string)CERT_KU_KEY_ENCIPHERMENT))))) + { + throw LLCertKeyUsageValidationException(cert); + } + // only validate EKU if the cert has it + if(current_cert_info.has(CERT_EXTENDED_KEY_USAGE) && current_cert_info[CERT_EXTENDED_KEY_USAGE].isArray() && + (!_LLSDArrayIncludesValue(current_cert_info[CERT_EXTENDED_KEY_USAGE], + LLSD((std::string)CERT_EKU_SERVER_AUTH)))) + { + throw LLCertKeyUsageValidationException(cert); + } + } + if (validation_policy & VALIDATION_POLICY_CA_KU) + { + if (current_cert_info.has(CERT_KEY_USAGE) && current_cert_info[CERT_KEY_USAGE].isArray() && + (!_LLSDArrayIncludesValue(current_cert_info[CERT_KEY_USAGE], + (std::string)CERT_KU_CERT_SIGN))) + { + throw LLCertKeyUsageValidationException(cert); + } + } + + // validate basic constraints + if ((validation_policy & VALIDATION_POLICY_CA_BASIC_CONSTRAINTS) && + current_cert_info.has(CERT_BASIC_CONSTRAINTS) && + current_cert_info[CERT_BASIC_CONSTRAINTS].isMap()) + { + if(!current_cert_info[CERT_BASIC_CONSTRAINTS].has(CERT_BASIC_CONSTRAINTS_CA) || + !current_cert_info[CERT_BASIC_CONSTRAINTS][CERT_BASIC_CONSTRAINTS_CA]) + { + throw LLCertBasicConstraintsValidationException(cert); + } + if (current_cert_info[CERT_BASIC_CONSTRAINTS].has(CERT_BASIC_CONSTRAINTS_PATHLEN) && + ((current_cert_info[CERT_BASIC_CONSTRAINTS][CERT_BASIC_CONSTRAINTS_PATHLEN].asInteger() != 0) && + (depth > current_cert_info[CERT_BASIC_CONSTRAINTS][CERT_BASIC_CONSTRAINTS_PATHLEN].asInteger()))) + { + throw LLCertBasicConstraintsValidationException(cert); + } + } +} + +bool _verify_signature(LLPointer<LLCertificate> parent, + LLPointer<LLCertificate> child) +{ + bool verify_result = FALSE; + LLSD cert1, cert2; + parent->getLLSD(cert1); + child->getLLSD(cert2); + X509 *signing_cert = parent->getOpenSSLX509(); + X509 *child_cert = child->getOpenSSLX509(); + if((signing_cert != NULL) && (child_cert != NULL)) + { + EVP_PKEY *pkey = X509_get_pubkey(signing_cert); + + + if(pkey) + { + int verify_code = X509_verify(child_cert, pkey); + verify_result = ( verify_code > 0); + EVP_PKEY_free(pkey); + } + else + { + LL_WARNS("SECAPI") << "Could not validate the cert chain signature, as the public key of the signing cert could not be retrieved" << LL_ENDL; + } + + } + else + { + LL_WARNS("SECAPI") << "Signature verification failed as there are no certs in the chain" << LL_ENDL; + } + if(child_cert) + { + X509_free(child_cert); + } + if(signing_cert) + { + X509_free(signing_cert); + } + return verify_result; +} + + +// validate the certificate chain against a store. +// There are many aspects of cert validatioin policy involved in +// trust validation. The policies in this validation algorithm include +// * Hostname matching for SSL certs +// * Expiration time matching +// * Signature validation +// * Chain trust (is the cert chain trusted against the store) +// * Basic constraints +// * key usage and extended key usage +// TODO: We should add 'authority key identifier' for chaining. +// This algorithm doesn't simply validate the chain by itself +// and verify the last cert is in the certificate store, or points +// to a cert in the store. It validates whether any cert in the chain +// is trusted in the store, even if it's not the last one. +void LLBasicCertificateStore::validate(int validation_policy, + LLPointer<LLCertificateChain> cert_chain, + const LLSD& validation_params) +{ + + if(cert_chain->size() < 1) + { + throw LLCertException(NULL, "No certs in chain"); + } + iterator current_cert = cert_chain->begin(); + LLSD current_cert_info; + LLSD validation_date; + if (validation_params.has(CERT_VALIDATION_DATE)) + { + validation_date = validation_params[CERT_VALIDATION_DATE]; + } + + if (validation_policy & VALIDATION_POLICY_HOSTNAME) + { + (*current_cert)->getLLSD(current_cert_info); + if(!validation_params.has(CERT_HOSTNAME)) + { + throw LLCertException((*current_cert), "No hostname passed in for validation"); + } + if(!current_cert_info.has(CERT_SUBJECT_NAME) || !current_cert_info[CERT_SUBJECT_NAME].has(CERT_NAME_CN)) + { + throw LLInvalidCertificate((*current_cert)); + } + + LL_DEBUGS("SECAPI") << "Validating the hostname " << validation_params[CERT_HOSTNAME].asString() << + "against the cert CN " << current_cert_info[CERT_SUBJECT_NAME][CERT_NAME_CN].asString() << LL_ENDL; + if(!_cert_hostname_wildcard_match(validation_params[CERT_HOSTNAME].asString(), + current_cert_info[CERT_SUBJECT_NAME][CERT_NAME_CN].asString())) + { + throw LLCertValidationHostnameException(validation_params[CERT_HOSTNAME].asString(), + (*current_cert)); + } + } + + // check the cache of already validated certs + X509* cert_x509 = (*current_cert)->getOpenSSLX509(); + if(!cert_x509) + { + throw LLInvalidCertificate((*current_cert)); + } + std::string sha1_hash((const char *)cert_x509->sha1_hash, SHA_DIGEST_LENGTH); + t_cert_cache::iterator cache_entry = mTrustedCertCache.find(sha1_hash); + if(cache_entry != mTrustedCertCache.end()) + { + LL_DEBUGS("SECAPI") << "Found cert in cache" << LL_ENDL; + // this cert is in the cache, so validate the time. + if (validation_policy & VALIDATION_POLICY_TIME) + { + LLDate validation_date(time(NULL)); + if(validation_params.has(CERT_VALIDATION_DATE)) + { + validation_date = validation_params[CERT_VALIDATION_DATE]; + } + + if((validation_date < cache_entry->second.first) || + (validation_date > cache_entry->second.second)) + { + throw LLCertValidationExpirationException((*current_cert), validation_date); + } + } + // successfully found in cache + return; + } + if(current_cert_info.isUndefined()) + { + (*current_cert)->getLLSD(current_cert_info); + } + LLDate from_time = current_cert_info[CERT_VALID_FROM].asDate(); + LLDate to_time = current_cert_info[CERT_VALID_TO].asDate(); + int depth = 0; + LLPointer<LLCertificate> previous_cert; + // loop through the cert chain, validating the current cert against the next one. + while(current_cert != cert_chain->end()) + { + + int local_validation_policy = validation_policy; + if(current_cert == cert_chain->begin()) + { + // for the child cert, we don't validate CA stuff + local_validation_policy &= ~(VALIDATION_POLICY_CA_KU | + VALIDATION_POLICY_CA_BASIC_CONSTRAINTS); + } + else + { + // for non-child certs, we don't validate SSL Key usage + local_validation_policy &= ~VALIDATION_POLICY_SSL_KU; + if(!_verify_signature((*current_cert), + previous_cert)) + { + throw LLCertValidationInvalidSignatureException(previous_cert); + } + } + _validateCert(local_validation_policy, + (*current_cert), + validation_params, + depth); + + // look for a CA in the CA store that may belong to this chain. + LLSD cert_search_params = LLSD::emptyMap(); + // is the cert itself in the store? + cert_search_params[CERT_SHA1_DIGEST] = current_cert_info[CERT_SHA1_DIGEST]; + LLCertificateStore::iterator found_store_cert = find(cert_search_params); + if(found_store_cert != end()) + { + mTrustedCertCache[sha1_hash] = std::pair<LLDate, LLDate>(from_time, to_time); + return; + } + + // is the parent in the cert store? + + cert_search_params = LLSD::emptyMap(); + cert_search_params[CERT_SUBJECT_NAME_STRING] = current_cert_info[CERT_ISSUER_NAME_STRING]; + if (current_cert_info.has(CERT_AUTHORITY_KEY_IDENTIFIER)) + { + LLSD cert_aki = current_cert_info[CERT_AUTHORITY_KEY_IDENTIFIER]; + if(cert_aki.has(CERT_AUTHORITY_KEY_IDENTIFIER_ID)) + { + cert_search_params[CERT_SUBJECT_KEY_IDENTFIER] = cert_aki[CERT_AUTHORITY_KEY_IDENTIFIER_ID]; + } + if(cert_aki.has(CERT_AUTHORITY_KEY_IDENTIFIER_SERIAL)) + { + cert_search_params[CERT_SERIAL_NUMBER] = cert_aki[CERT_AUTHORITY_KEY_IDENTIFIER_SERIAL]; + } + } + found_store_cert = find(cert_search_params); + + if(found_store_cert != end()) + { + // validate the store cert against the depth + _validateCert(validation_policy & VALIDATION_POLICY_CA_BASIC_CONSTRAINTS, + (*found_store_cert), + LLSD(), + depth); + + // verify the signature of the CA + if(!_verify_signature((*found_store_cert), + (*current_cert))) + { + throw LLCertValidationInvalidSignatureException(*current_cert); + } + // successfully validated. + mTrustedCertCache[sha1_hash] = std::pair<LLDate, LLDate>(from_time, to_time); + return; + } + previous_cert = (*current_cert); + current_cert++; + depth++; + if(current_cert != cert_chain->end()) + { + (*current_cert)->getLLSD(current_cert_info); + } + } + if (validation_policy & VALIDATION_POLICY_TRUSTED) + { + // we reached the end without finding a trusted cert. + throw LLCertValidationTrustException((*cert_chain)[cert_chain->size()-1]); + + } + mTrustedCertCache[sha1_hash] = std::pair<LLDate, LLDate>(from_time, to_time); +} + + +// LLSecAPIBasicHandler Class +// Interface handler class for the various security storage handlers. + +// We read the file on construction, and write it on destruction. This +// means multiple processes cannot modify the datastore. +LLSecAPIBasicHandler::LLSecAPIBasicHandler(const std::string& protected_data_file, + const std::string& legacy_password_path) +{ + mProtectedDataFilename = protected_data_file; + mProtectedDataMap = LLSD::emptyMap(); + mLegacyPasswordPath = legacy_password_path; + +} + +LLSecAPIBasicHandler::LLSecAPIBasicHandler() +{ +} + + +void LLSecAPIBasicHandler::init() +{ + mProtectedDataMap = LLSD::emptyMap(); + if (mProtectedDataFilename.length() == 0) + { + mProtectedDataFilename = gDirUtilp->getExpandedFilename(LL_PATH_USER_SETTINGS, + "bin_conf.dat"); + mLegacyPasswordPath = gDirUtilp->getExpandedFilename(LL_PATH_USER_SETTINGS, "password.dat"); + + mProtectedDataFilename = gDirUtilp->getExpandedFilename(LL_PATH_USER_SETTINGS, + "bin_conf.dat"); + std::string store_file = gDirUtilp->getExpandedFilename(LL_PATH_USER_SETTINGS, + "CA.pem"); + + + LL_DEBUGS("SECAPI") << "Loading certificate store from " << store_file << LL_ENDL; + mStore = new LLBasicCertificateStore(store_file); + + // grab the application CA.pem file that contains the well-known certs shipped + // with the product + std::string ca_file_path = gDirUtilp->getExpandedFilename(LL_PATH_APP_SETTINGS, "CA.pem"); + llinfos << "app path " << ca_file_path << llendl; + LLBasicCertificateStore app_ca_store = LLBasicCertificateStore(ca_file_path); + + // push the applicate CA files into the store, therefore adding any new CA certs that + // updated + for(LLCertificateVector::iterator i = app_ca_store.begin(); + i != app_ca_store.end(); + i++) + { + mStore->add(*i); + } + + } + _readProtectedData(); // initialize mProtectedDataMap + // may throw LLProtectedDataException if saved datamap is not decryptable +} +LLSecAPIBasicHandler::~LLSecAPIBasicHandler() +{ + _writeProtectedData(); +} + +void LLSecAPIBasicHandler::_readProtectedData() +{ + // attempt to load the file into our map + LLPointer<LLSDParser> parser = new LLSDXMLParser(); + llifstream protected_data_stream(mProtectedDataFilename.c_str(), + llifstream::binary); + + if (!protected_data_stream.fail()) { + int offset; + U8 salt[STORE_SALT_SIZE]; + U8 buffer[BUFFER_READ_SIZE]; + U8 decrypted_buffer[BUFFER_READ_SIZE]; + int decrypted_length; + unsigned char unique_id[MAC_ADDRESS_BYTES]; + LLMachineID::getUniqueID(unique_id, sizeof(unique_id)); + LLXORCipher cipher(unique_id, sizeof(unique_id)); + + // read in the salt and key + protected_data_stream.read((char *)salt, STORE_SALT_SIZE); + offset = 0; + if (protected_data_stream.gcount() < STORE_SALT_SIZE) + { + throw LLProtectedDataException("Config file too short."); + } + + cipher.decrypt(salt, STORE_SALT_SIZE); + + // totally lame. As we're not using the OS level protected data, we need to + // at least obfuscate the data. We do this by using a salt stored at the head of the file + // to encrypt the data, therefore obfuscating it from someone using simple existing tools. + // We do include the MAC address as part of the obfuscation, which would require an + // attacker to get the MAC address as well as the protected store, which improves things + // somewhat. It would be better to use the password, but as this store + // will be used to store the SL password when the user decides to have SL remember it, + // so we can't use that. OS-dependent store implementations will use the OS password/storage + // mechanisms and are considered to be more secure. + // We've a strong intent to move to OS dependent protected data stores. + + + // read in the rest of the file. + EVP_CIPHER_CTX ctx; + EVP_CIPHER_CTX_init(&ctx); + EVP_DecryptInit(&ctx, EVP_rc4(), salt, NULL); + // allocate memory: + std::string decrypted_data; + + while(protected_data_stream.good()) { + // read data as a block: + protected_data_stream.read((char *)buffer, BUFFER_READ_SIZE); + + EVP_DecryptUpdate(&ctx, decrypted_buffer, &decrypted_length, + buffer, protected_data_stream.gcount()); + decrypted_data.append((const char *)decrypted_buffer, protected_data_stream.gcount()); + } + + // RC4 is a stream cipher, so we don't bother to EVP_DecryptFinal, as there is + // no block padding. + EVP_CIPHER_CTX_cleanup(&ctx); + std::istringstream parse_stream(decrypted_data); + if (parser->parse(parse_stream, mProtectedDataMap, + LLSDSerialize::SIZE_UNLIMITED) == LLSDParser::PARSE_FAILURE) + { + throw LLProtectedDataException("Config file cannot be decrypted."); + } + } +} + +void LLSecAPIBasicHandler::_writeProtectedData() +{ + std::ostringstream formatted_data_ostream; + U8 salt[STORE_SALT_SIZE]; + U8 buffer[BUFFER_READ_SIZE]; + U8 encrypted_buffer[BUFFER_READ_SIZE]; + + + if(mProtectedDataMap.isUndefined()) + { + LLFile::remove(mProtectedDataFilename); + return; + } + // create a string with the formatted data. + LLSDSerialize::toXML(mProtectedDataMap, formatted_data_ostream); + std::istringstream formatted_data_istream(formatted_data_ostream.str()); + // generate the seed + RAND_bytes(salt, STORE_SALT_SIZE); + + + // write to a temp file so we don't clobber the initial file if there is + // an error. + std::string tmp_filename = mProtectedDataFilename + ".tmp"; + + llofstream protected_data_stream(tmp_filename.c_str(), + llofstream::binary); + try + { + + EVP_CIPHER_CTX ctx; + EVP_CIPHER_CTX_init(&ctx); + EVP_EncryptInit(&ctx, EVP_rc4(), salt, NULL); + unsigned char unique_id[MAC_ADDRESS_BYTES]; + LLMachineID::getUniqueID(unique_id, sizeof(unique_id)); + LLXORCipher cipher(unique_id, sizeof(unique_id)); + cipher.encrypt(salt, STORE_SALT_SIZE); + protected_data_stream.write((const char *)salt, STORE_SALT_SIZE); + + while (formatted_data_istream.good()) + { + formatted_data_istream.read((char *)buffer, BUFFER_READ_SIZE); + if(formatted_data_istream.gcount() == 0) + { + break; + } + int encrypted_length; + EVP_EncryptUpdate(&ctx, encrypted_buffer, &encrypted_length, + buffer, formatted_data_istream.gcount()); + protected_data_stream.write((const char *)encrypted_buffer, encrypted_length); + } + + // no EVP_EncrypteFinal, as this is a stream cipher + EVP_CIPHER_CTX_cleanup(&ctx); + + protected_data_stream.close(); + } + catch (...) + { + // it's good practice to clean up any secure information on error + // (even though this file isn't really secure. Perhaps in the future + // it may be, however. + LLFile::remove(tmp_filename); + throw LLProtectedDataException("Error writing Protected Data Store"); + } + + // move the temporary file to the specified file location. + if((((LLFile::isfile(mProtectedDataFilename) != 0) && + (LLFile::remove(mProtectedDataFilename) != 0))) || + (LLFile::rename(tmp_filename, mProtectedDataFilename))) + { + LLFile::remove(tmp_filename); + throw LLProtectedDataException("Could not overwrite protected data store"); + } +} + +// instantiate a certificate from a pem string +LLPointer<LLCertificate> LLSecAPIBasicHandler::getCertificate(const std::string& pem_cert) +{ + LLPointer<LLCertificate> result = new LLBasicCertificate(pem_cert); + return result; +} + + + +// instiate a certificate from an openssl X509 structure +LLPointer<LLCertificate> LLSecAPIBasicHandler::getCertificate(X509* openssl_cert) +{ + LLPointer<LLCertificate> result = new LLBasicCertificate(openssl_cert); + return result; +} + +// instantiate a chain from an X509_STORE_CTX +LLPointer<LLCertificateChain> LLSecAPIBasicHandler::getCertificateChain(const X509_STORE_CTX* chain) +{ + LLPointer<LLCertificateChain> result = new LLBasicCertificateChain(chain); + return result; +} + +// 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) +LLPointer<LLCertificateStore> LLSecAPIBasicHandler::getCertificateStore(const std::string& store_id) +{ + return mStore; +} + +// retrieve protected data +LLSD LLSecAPIBasicHandler::getProtectedData(const std::string& data_type, + const std::string& data_id) +{ + + if (mProtectedDataMap.has(data_type) && + mProtectedDataMap[data_type].isMap() && + mProtectedDataMap[data_type].has(data_id)) + { + return mProtectedDataMap[data_type][data_id]; + } + + return LLSD(); +} + +void LLSecAPIBasicHandler::deleteProtectedData(const std::string& data_type, + const std::string& data_id) +{ + if (mProtectedDataMap.has(data_type) && + mProtectedDataMap[data_type].isMap() && + mProtectedDataMap[data_type].has(data_id)) + { + mProtectedDataMap[data_type].erase(data_id); + } +} + + +// +// persist data in a protected store +// +void LLSecAPIBasicHandler::setProtectedData(const std::string& data_type, + const std::string& data_id, + const LLSD& data) +{ + if (!mProtectedDataMap.has(data_type) || !mProtectedDataMap[data_type].isMap()) { + mProtectedDataMap[data_type] = LLSD::emptyMap(); + } + + mProtectedDataMap[data_type][data_id] = data; +} + +// +// Create a credential object from an identifier and authenticator. credentials are +// per grid. +LLPointer<LLCredential> LLSecAPIBasicHandler::createCredential(const std::string& grid, + const LLSD& identifier, + const LLSD& authenticator) +{ + LLPointer<LLSecAPIBasicCredential> result = new LLSecAPIBasicCredential(grid); + result->setCredentialData(identifier, authenticator); + return result; +} + +// Load a credential from the credential store, given the grid +LLPointer<LLCredential> LLSecAPIBasicHandler::loadCredential(const std::string& grid) +{ + LLSD credential = getProtectedData("credential", grid); + LLPointer<LLSecAPIBasicCredential> result = new LLSecAPIBasicCredential(grid); + if(credential.isMap() && + credential.has("identifier")) + { + + LLSD identifier = credential["identifier"]; + LLSD authenticator; + if (credential.has("authenticator")) + { + authenticator = credential["authenticator"]; + } + result->setCredentialData(identifier, authenticator); + } + else + { + // credential was not in protected storage, so pull the credential + // from the legacy store. + std::string first_name = gSavedSettings.getString("FirstName"); + std::string last_name = gSavedSettings.getString("LastName"); + + if ((first_name != "") && + (last_name != "")) + { + LLSD identifier = LLSD::emptyMap(); + LLSD authenticator; + identifier["type"] = "agent"; + identifier["first_name"] = first_name; + identifier["last_name"] = last_name; + + std::string legacy_password = _legacyLoadPassword(); + if (legacy_password.length() > 0) + { + authenticator = LLSD::emptyMap(); + authenticator["type"] = "hash"; + authenticator["algorithm"] = "md5"; + authenticator["secret"] = legacy_password; + } + result->setCredentialData(identifier, authenticator); + } + } + return result; +} + +// Save the credential to the credential store. Save the authenticator also if requested. +// That feature is used to implement the 'remember password' functionality. +void LLSecAPIBasicHandler::saveCredential(LLPointer<LLCredential> cred, bool save_authenticator) +{ + LLSD credential = LLSD::emptyMap(); + credential["identifier"] = cred->getIdentifier(); + if (save_authenticator) + { + credential["authenticator"] = cred->getAuthenticator(); + } + LL_DEBUGS("SECAPI") << "Saving Credential " << cred->getGrid() << ":" << cred->userID() << " " << save_authenticator << LL_ENDL; + setProtectedData("credential", cred->getGrid(), credential); + //*TODO: If we're saving Agni credentials, should we write the + // credentials to the legacy password.dat/etc? + _writeProtectedData(); +} + +// Remove a credential from the credential store. +void LLSecAPIBasicHandler::deleteCredential(LLPointer<LLCredential> cred) +{ + LLSD undefVal; + deleteProtectedData("credential", cred->getGrid()); + cred->setCredentialData(undefVal, undefVal); + _writeProtectedData(); +} + +// load the legacy hash for agni, and decrypt it given the +// mac address +std::string LLSecAPIBasicHandler::_legacyLoadPassword() +{ + const S32 HASHED_LENGTH = 32; + std::vector<U8> buffer(HASHED_LENGTH); + llifstream password_file(mLegacyPasswordPath, llifstream::binary); + + if(password_file.fail()) + { + return std::string(""); + } + + password_file.read((char*)&buffer[0], buffer.size()); + if(password_file.gcount() != buffer.size()) + { + return std::string(""); + } + + // Decipher with MAC address + unsigned char unique_id[MAC_ADDRESS_BYTES]; + LLMachineID::getUniqueID(unique_id, sizeof(unique_id)); + LLXORCipher cipher(unique_id, sizeof(unique_id)); + cipher.decrypt(&buffer[0], buffer.size()); + + return std::string((const char*)&buffer[0], buffer.size()); +} + + +// return an identifier for the user +std::string LLSecAPIBasicCredential::userID() const +{ + if (!mIdentifier.isMap()) + { + return mGrid + "(null)"; + } + else if ((std::string)mIdentifier["type"] == "agent") + { + return (std::string)mIdentifier["first_name"] + "_" + (std::string)mIdentifier["last_name"]; + } + else if ((std::string)mIdentifier["type"] == "account") + { + return (std::string)mIdentifier["account_name"]; + } + + return "unknown"; + +} + +// return a printable user identifier +std::string LLSecAPIBasicCredential::asString() const +{ + if (!mIdentifier.isMap()) + { + return mGrid + ":(null)"; + } + else if ((std::string)mIdentifier["type"] == "agent") + { + return mGrid + ":" + (std::string)mIdentifier["first_name"] + " " + (std::string)mIdentifier["last_name"]; + } + else if ((std::string)mIdentifier["type"] == "account") + { + return mGrid + ":" + (std::string)mIdentifier["account_name"]; + } + + return mGrid + ":(unknown type)"; +} + + +bool valueCompareLLSD(const LLSD& lhs, const LLSD& rhs) +{ + if (lhs.type() != rhs.type()) + { + return FALSE; + } + if (lhs.isMap()) + { + // iterate through the map, verifying the right hand side has all of the + // values that the left hand side has. + for (LLSD::map_const_iterator litt = lhs.beginMap(); + litt != lhs.endMap(); + litt++) + { + if (!rhs.has(litt->first)) + { + return FALSE; + } + } + + // Now validate that the left hand side has everything the + // right hand side has, and that the values are equal. + for (LLSD::map_const_iterator ritt = rhs.beginMap(); + ritt != rhs.endMap(); + ritt++) + { + if (!lhs.has(ritt->first)) + { + return FALSE; + } + if (!valueCompareLLSD(lhs[ritt->first], ritt->second)) + { + return FALSE; + } + } + return TRUE; + } + else if (lhs.isArray()) + { + LLSD::array_const_iterator ritt = rhs.beginArray(); + // iterate through the array, comparing + for (LLSD::array_const_iterator litt = lhs.beginArray(); + litt != lhs.endArray(); + litt++) + { + if (!valueCompareLLSD(*ritt, *litt)) + { + return FALSE; + } + ritt++; + } + + return (ritt == rhs.endArray()); + } + else + { + // simple type, compare as string + return (lhs.asString() == rhs.asString()); + } + +} |