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rgw_iam_policy.cc
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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#include <cstring>
#include <iostream>
#include <regex>
#include <sstream>
#include <stack>
#include <utility>
#include <experimental/iterator>
#include <boost/regex.hpp>
#include "rapidjson/reader.h"
#include "rgw_auth.h"
#include <arpa/inet.h>
#include "rgw_iam_policy.h"
namespace {
constexpr int dout_subsys = ceph_subsys_rgw;
}
using std::bitset;
using std::find;
using std::int64_t;
using std::move;
using std::pair;
using std::regex;
using std::regex_match;
using std::size_t;
using std::smatch;
using std::string;
using std::stringstream;
using std::ostream;
using std::uint16_t;
using std::uint64_t;
using std::unordered_map;
using boost::container::flat_set;
using std::regex;
using std::regex_constants::ECMAScript;
using std::regex_constants::optimize;
using std::regex_match;
using std::smatch;
using rapidjson::BaseReaderHandler;
using rapidjson::UTF8;
using rapidjson::SizeType;
using rapidjson::Reader;
using rapidjson::kParseCommentsFlag;
using rapidjson::kParseNumbersAsStringsFlag;
using rapidjson::StringStream;
using rapidjson::ParseResult;
using rgw::auth::Principal;
namespace rgw {
namespace IAM {
#include "rgw_iam_policy_keywords.frag.cc"
struct actpair {
const char* name;
const uint64_t bit;
};
namespace {
boost::optional<Partition> to_partition(const smatch::value_type& p,
bool wildcards) {
if (p == "aws") {
return Partition::aws;
} else if (p == "aws-cn") {
return Partition::aws_cn;
} else if (p == "aws-us-gov") {
return Partition::aws_us_gov;
} else if (p == "*" && wildcards) {
return Partition::wildcard;
} else {
return boost::none;
}
ceph_abort();
}
boost::optional<Service> to_service(const smatch::value_type& s,
bool wildcards) {
static const unordered_map<string, Service> services = {
{ "acm", Service::acm },
{ "apigateway", Service::apigateway },
{ "appstream", Service::appstream },
{ "artifact", Service::artifact },
{ "autoscaling", Service::autoscaling },
{ "aws-marketplace", Service::aws_marketplace },
{ "aws-marketplace-management",
Service::aws_marketplace_management },
{ "aws-portal", Service::aws_portal },
{ "cloudformation", Service::cloudformation },
{ "cloudfront", Service::cloudfront },
{ "cloudhsm", Service::cloudhsm },
{ "cloudsearch", Service::cloudsearch },
{ "cloudtrail", Service::cloudtrail },
{ "cloudwatch", Service::cloudwatch },
{ "codebuild", Service::codebuild },
{ "codecommit", Service::codecommit },
{ "codedeploy", Service::codedeploy },
{ "codepipeline", Service::codepipeline },
{ "cognito-identity", Service::cognito_identity },
{ "cognito-idp", Service::cognito_idp },
{ "cognito-sync", Service::cognito_sync },
{ "config", Service::config },
{ "datapipeline", Service::datapipeline },
{ "devicefarm", Service::devicefarm },
{ "directconnect", Service::directconnect },
{ "dms", Service::dms },
{ "ds", Service::ds },
{ "dynamodb", Service::dynamodb },
{ "ec2", Service::ec2 },
{ "ecr", Service::ecr },
{ "ecs", Service::ecs },
{ "elasticache", Service::elasticache },
{ "elasticbeanstalk", Service::elasticbeanstalk },
{ "elasticfilesystem", Service::elasticfilesystem },
{ "elasticloadbalancing", Service::elasticloadbalancing },
{ "elasticmapreduce", Service::elasticmapreduce },
{ "elastictranscoder", Service::elastictranscoder },
{ "es", Service::es },
{ "events", Service::events },
{ "firehose", Service::firehose },
{ "gamelift", Service::gamelift },
{ "glacier", Service::glacier },
{ "health", Service::health },
{ "iam", Service::iam },
{ "importexport", Service::importexport },
{ "inspector", Service::inspector },
{ "iot", Service::iot },
{ "kinesis", Service::kinesis },
{ "kinesisanalytics", Service::kinesisanalytics },
{ "kms", Service::kms },
{ "lambda", Service::lambda },
{ "lightsail", Service::lightsail },
{ "logs", Service::logs },
{ "machinelearning", Service::machinelearning },
{ "mobileanalytics", Service::mobileanalytics },
{ "mobilehub", Service::mobilehub },
{ "opsworks", Service::opsworks },
{ "opsworks-cm", Service::opsworks_cm },
{ "polly", Service::polly },
{ "rds", Service::rds },
{ "redshift", Service::redshift },
{ "route53", Service::route53 },
{ "route53domains", Service::route53domains },
{ "s3", Service::s3 },
{ "sdb", Service::sdb },
{ "servicecatalog", Service::servicecatalog },
{ "ses", Service::ses },
{ "sns", Service::sns },
{ "sqs", Service::sqs },
{ "ssm", Service::ssm },
{ "states", Service::states },
{ "storagegateway", Service::storagegateway },
{ "sts", Service::sts },
{ "support", Service::support },
{ "swf", Service::swf },
{ "trustedadvisor", Service::trustedadvisor },
{ "waf", Service::waf },
{ "workmail", Service::workmail },
{ "workspaces", Service::workspaces }};
if (wildcards && s == "*") {
return Service::wildcard;
}
auto i = services.find(s);
if (i == services.end()) {
return boost::none;
} else {
return i->second;
}
}
}
ARN::ARN(const rgw_obj& o)
: partition(Partition::aws),
service(Service::s3),
region(),
account(o.bucket.tenant),
resource(o.bucket.name)
{
resource.push_back('/');
resource.append(o.key.name);
}
ARN::ARN(const rgw_bucket& b)
: partition(Partition::aws),
service(Service::s3),
region(),
account(b.tenant),
resource(b.name) { }
ARN::ARN(const rgw_bucket& b, const string& o)
: partition(Partition::aws),
service(Service::s3),
region(),
account(b.tenant),
resource(b.name) {
resource.push_back('/');
resource.append(o);
}
ARN::ARN(const string& resource_name, const string& type, const string& tenant, bool has_path)
: partition(Partition::aws),
service(Service::iam),
region(),
account(tenant),
resource(type) {
if (! has_path)
resource.push_back('/');
resource.append(resource_name);
}
boost::optional<ARN> ARN::parse(const string& s, bool wildcards) {
static const regex rx_wild("arn:([^:]*):([^:]*):([^:]*):([^:]*):([^:]*)",
std::regex_constants::ECMAScript |
std::regex_constants::optimize);
static const regex rx_no_wild(
"arn:([^:*]*):([^:*]*):([^:*]*):([^:*]*):([^:*]*)",
std::regex_constants::ECMAScript |
std::regex_constants::optimize);
smatch match;
if ((s == "*") && wildcards) {
return ARN(Partition::wildcard, Service::wildcard, "*", "*", "*");
} else if (regex_match(s, match, wildcards ? rx_wild : rx_no_wild) &&
match.size() == 6) {
if (auto p = to_partition(match[1], wildcards)) {
if (auto s = to_service(match[2], wildcards)) {
return ARN(*p, *s, match[3], match[4], match[5]);
}
}
}
return boost::none;
}
string ARN::to_string() const {
string s;
if (partition == Partition::aws) {
s.append("aws:");
} else if (partition == Partition::aws_cn) {
s.append("aws-cn:");
} else if (partition == Partition::aws_us_gov) {
s.append("aws-us-gov:");
} else {
s.append("*:");
}
static const unordered_map<Service, string> services = {
{ Service::acm, "acm" },
{ Service::apigateway, "apigateway" },
{ Service::appstream, "appstream" },
{ Service::artifact, "artifact" },
{ Service::autoscaling, "autoscaling" },
{ Service::aws_marketplace, "aws-marketplace" },
{ Service::aws_marketplace_management, "aws-marketplace-management" },
{ Service::aws_portal, "aws-portal" },
{ Service::cloudformation, "cloudformation" },
{ Service::cloudfront, "cloudfront" },
{ Service::cloudhsm, "cloudhsm" },
{ Service::cloudsearch, "cloudsearch" },
{ Service::cloudtrail, "cloudtrail" },
{ Service::cloudwatch, "cloudwatch" },
{ Service::codebuild, "codebuild" },
{ Service::codecommit, "codecommit" },
{ Service::codedeploy, "codedeploy" },
{ Service::codepipeline, "codepipeline" },
{ Service::cognito_identity, "cognito-identity" },
{ Service::cognito_idp, "cognito-idp" },
{ Service::cognito_sync, "cognito-sync" },
{ Service::config, "config" },
{ Service::datapipeline, "datapipeline" },
{ Service::devicefarm, "devicefarm" },
{ Service::directconnect, "directconnect" },
{ Service::dms, "dms" },
{ Service::ds, "ds" },
{ Service::dynamodb, "dynamodb" },
{ Service::ec2, "ec2" },
{ Service::ecr, "ecr" },
{ Service::ecs, "ecs" },
{ Service::elasticache, "elasticache" },
{ Service::elasticbeanstalk, "elasticbeanstalk" },
{ Service::elasticfilesystem, "elasticfilesystem" },
{ Service::elasticloadbalancing, "elasticloadbalancing" },
{ Service::elasticmapreduce, "elasticmapreduce" },
{ Service::elastictranscoder, "elastictranscoder" },
{ Service::es, "es" },
{ Service::events, "events" },
{ Service::firehose, "firehose" },
{ Service::gamelift, "gamelift" },
{ Service::glacier, "glacier" },
{ Service::health, "health" },
{ Service::iam, "iam" },
{ Service::importexport, "importexport" },
{ Service::inspector, "inspector" },
{ Service::iot, "iot" },
{ Service::kinesis, "kinesis" },
{ Service::kinesisanalytics, "kinesisanalytics" },
{ Service::kms, "kms" },
{ Service::lambda, "lambda" },
{ Service::lightsail, "lightsail" },
{ Service::logs, "logs" },
{ Service::machinelearning, "machinelearning" },
{ Service::mobileanalytics, "mobileanalytics" },
{ Service::mobilehub, "mobilehub" },
{ Service::opsworks, "opsworks" },
{ Service::opsworks_cm, "opsworks-cm" },
{ Service::polly, "polly" },
{ Service::rds, "rds" },
{ Service::redshift, "redshift" },
{ Service::route53, "route53" },
{ Service::route53domains, "route53domains" },
{ Service::s3, "s3" },
{ Service::sdb, "sdb" },
{ Service::servicecatalog, "servicecatalog" },
{ Service::ses, "ses" },
{ Service::sns, "sns" },
{ Service::sqs, "sqs" },
{ Service::ssm, "ssm" },
{ Service::states, "states" },
{ Service::storagegateway, "storagegateway" },
{ Service::sts, "sts" },
{ Service::support, "support" },
{ Service::swf, "swf" },
{ Service::trustedadvisor, "trustedadvisor" },
{ Service::waf, "waf" },
{ Service::workmail, "workmail" },
{ Service::workspaces, "workspaces" }};
auto i = services.find(service);
if (i != services.end()) {
s.append(i->second);
} else {
s.push_back('*');
}
s.push_back(':');
s.append(region);
s.push_back(':');
s.append(account);
s.push_back(':');
s.append(resource);
return s;
}
bool operator ==(const ARN& l, const ARN& r) {
return ((l.partition == r.partition) &&
(l.service == r.service) &&
(l.region == r.region) &&
(l.account == r.account) &&
(l.resource == r.resource));
}
bool operator <(const ARN& l, const ARN& r) {
return ((l.partition < r.partition) ||
(l.service < r.service) ||
(l.region < r.region) ||
(l.account < r.account) ||
(l.resource < r.resource));
}
// The candidate is not allowed to have wildcards. The only way to
// do that sanely would be to use unification rather than matching.
bool ARN::match(const ARN& candidate) const {
if ((candidate.partition == Partition::wildcard) ||
(partition != candidate.partition && partition
!= Partition::wildcard)) {
return false;
}
if ((candidate.service == Service::wildcard) ||
(service != candidate.service && service != Service::wildcard)) {
return false;
}
if (!match_policy(region, candidate.region, MATCH_POLICY_ARN)) {
return false;
}
if (!match_policy(account, candidate.account, MATCH_POLICY_ARN)) {
return false;
}
if (!match_policy(resource, candidate.resource, MATCH_POLICY_ARN)) {
return false;
}
return true;
}
static const actpair actpairs[] =
{{ "s3:AbortMultipartUpload", s3AbortMultipartUpload },
{ "s3:CreateBucket", s3CreateBucket },
{ "s3:DeleteBucketPolicy", s3DeleteBucketPolicy },
{ "s3:DeleteBucket", s3DeleteBucket },
{ "s3:DeleteBucketWebsite", s3DeleteBucketWebsite },
{ "s3:DeleteObject", s3DeleteObject },
{ "s3:DeleteObjectVersion", s3DeleteObjectVersion },
{ "s3:DeleteObjectTagging", s3DeleteObjectTagging },
{ "s3:DeleteObjectVersionTagging", s3DeleteObjectVersionTagging },
{ "s3:DeleteReplicationConfiguration", s3DeleteReplicationConfiguration },
{ "s3:GetAccelerateConfiguration", s3GetAccelerateConfiguration },
{ "s3:GetBucketAcl", s3GetBucketAcl },
{ "s3:GetBucketCORS", s3GetBucketCORS },
{ "s3:GetBucketLocation", s3GetBucketLocation },
{ "s3:GetBucketLogging", s3GetBucketLogging },
{ "s3:GetBucketNotification", s3GetBucketNotification },
{ "s3:GetBucketPolicy", s3GetBucketPolicy },
{ "s3:GetBucketRequestPayment", s3GetBucketRequestPayment },
{ "s3:GetBucketTagging", s3GetBucketTagging },
{ "s3:GetBucketVersioning", s3GetBucketVersioning },
{ "s3:GetBucketWebsite", s3GetBucketWebsite },
{ "s3:GetLifecycleConfiguration", s3GetLifecycleConfiguration },
{ "s3:GetObjectAcl", s3GetObjectAcl },
{ "s3:GetObject", s3GetObject },
{ "s3:GetObjectTorrent", s3GetObjectTorrent },
{ "s3:GetObjectVersionAcl", s3GetObjectVersionAcl },
{ "s3:GetObjectVersion", s3GetObjectVersion },
{ "s3:GetObjectVersionTorrent", s3GetObjectVersionTorrent },
{ "s3:GetObjectTagging", s3GetObjectTagging },
{ "s3:GetObjectVersionTagging", s3GetObjectVersionTagging},
{ "s3:GetReplicationConfiguration", s3GetReplicationConfiguration },
{ "s3:ListAllMyBuckets", s3ListAllMyBuckets },
{ "s3:ListBucketMultipartUploads", s3ListBucketMultipartUploads },
{ "s3:ListBucket", s3ListBucket },
{ "s3:ListBucketVersions", s3ListBucketVersions },
{ "s3:ListMultipartUploadParts", s3ListMultipartUploadParts },
{ "s3:PutAccelerateConfiguration", s3PutAccelerateConfiguration },
{ "s3:PutBucketAcl", s3PutBucketAcl },
{ "s3:PutBucketCORS", s3PutBucketCORS },
{ "s3:PutBucketLogging", s3PutBucketLogging },
{ "s3:PutBucketNotification", s3PutBucketNotification },
{ "s3:PutBucketPolicy", s3PutBucketPolicy },
{ "s3:PutBucketRequestPayment", s3PutBucketRequestPayment },
{ "s3:PutBucketTagging", s3PutBucketTagging },
{ "s3:PutBucketVersioning", s3PutBucketVersioning },
{ "s3:PutBucketWebsite", s3PutBucketWebsite },
{ "s3:PutLifecycleConfiguration", s3PutLifecycleConfiguration },
{ "s3:PutObjectAcl", s3PutObjectAcl },
{ "s3:PutObject", s3PutObject },
{ "s3:PutObjectVersionAcl", s3PutObjectVersionAcl },
{ "s3:PutObjectTagging", s3PutObjectTagging },
{ "s3:PutObjectVersionTagging", s3PutObjectVersionTagging },
{ "s3:PutReplicationConfiguration", s3PutReplicationConfiguration },
{ "s3:RestoreObject", s3RestoreObject },
{ "iam:PutUserPolicy", iamPutUserPolicy },
{ "iam:GetUserPolicy", iamGetUserPolicy },
{ "iam:DeleteUserPolicy", iamDeleteUserPolicy },
{ "iam:ListUserPolicies", iamListUserPolicies },
{ "iam:CreateRole", iamCreateRole},
{ "iam:DeleteRole", iamDeleteRole},
{ "iam:GetRole", iamGetRole},
{ "iam:ModifyRole", iamModifyRole},
{ "iam:ListRoles", iamListRoles},
{ "iam:PutRolePolicy", iamPutRolePolicy},
{ "iam:GetRolePolicy", iamGetRolePolicy},
{ "iam:ListRolePolicies", iamListRolePolicies},
{ "iam:DeleteRolePolicy", iamDeleteRolePolicy},
{ "sts:AssumeRole", stsAssumeRole},
};
struct PolicyParser;
const Keyword top[1]{"<Top>", TokenKind::pseudo, TokenID::Top, 0, false,
false};
const Keyword cond_key[1]{"<Condition Key>", TokenKind::cond_key,
TokenID::CondKey, 0, true, false};
struct ParseState {
PolicyParser* pp;
const Keyword* w;
bool arraying = false;
bool objecting = false;
bool cond_ifexists = false;
void reset();
ParseState(PolicyParser* pp, const Keyword* w)
: pp(pp), w(w) {}
bool obj_start();
bool obj_end();
bool array_start() {
if (w->arrayable && !arraying) {
arraying = true;
return true;
}
return false;
}
bool array_end();
bool key(const char* s, size_t l);
bool do_string(CephContext* cct, const char* s, size_t l);
bool number(const char* str, size_t l);
};
// If this confuses you, look up the Curiously Recurring Template Pattern
struct PolicyParser : public BaseReaderHandler<UTF8<>, PolicyParser> {
keyword_hash tokens;
std::vector<ParseState> s;
CephContext* cct;
const string& tenant;
Policy& policy;
uint32_t v = 0;
uint32_t seen = 0;
uint32_t dex(TokenID in) const {
switch (in) {
case TokenID::Version:
return 0x1;
case TokenID::Id:
return 0x2;
case TokenID::Statement:
return 0x4;
case TokenID::Sid:
return 0x8;
case TokenID::Effect:
return 0x10;
case TokenID::Principal:
return 0x20;
case TokenID::NotPrincipal:
return 0x40;
case TokenID::Action:
return 0x80;
case TokenID::NotAction:
return 0x100;
case TokenID::Resource:
return 0x200;
case TokenID::NotResource:
return 0x400;
case TokenID::Condition:
return 0x800;
case TokenID::AWS:
return 0x1000;
case TokenID::Federated:
return 0x2000;
case TokenID::Service:
return 0x4000;
case TokenID::CanonicalUser:
return 0x8000;
default:
ceph_abort();
}
}
bool test(TokenID in) {
return seen & dex(in);
}
void set(TokenID in) {
seen |= dex(in);
if (dex(in) & (dex(TokenID::Sid) | dex(TokenID::Effect) |
dex(TokenID::Principal) | dex(TokenID::NotPrincipal) |
dex(TokenID::Action) | dex(TokenID::NotAction) |
dex(TokenID::Resource) | dex(TokenID::NotResource) |
dex(TokenID::Condition) | dex(TokenID::AWS) |
dex(TokenID::Federated) | dex(TokenID::Service) |
dex(TokenID::CanonicalUser))) {
v |= dex(in);
}
}
void set(std::initializer_list<TokenID> l) {
for (auto in : l) {
seen |= dex(in);
if (dex(in) & (dex(TokenID::Sid) | dex(TokenID::Effect) |
dex(TokenID::Principal) | dex(TokenID::NotPrincipal) |
dex(TokenID::Action) | dex(TokenID::NotAction) |
dex(TokenID::Resource) | dex(TokenID::NotResource) |
dex(TokenID::Condition) | dex(TokenID::AWS) |
dex(TokenID::Federated) | dex(TokenID::Service) |
dex(TokenID::CanonicalUser))) {
v |= dex(in);
}
}
}
void reset(TokenID in) {
seen &= ~dex(in);
if (dex(in) & (dex(TokenID::Sid) | dex(TokenID::Effect) |
dex(TokenID::Principal) | dex(TokenID::NotPrincipal) |
dex(TokenID::Action) | dex(TokenID::NotAction) |
dex(TokenID::Resource) | dex(TokenID::NotResource) |
dex(TokenID::Condition) | dex(TokenID::AWS) |
dex(TokenID::Federated) | dex(TokenID::Service) |
dex(TokenID::CanonicalUser))) {
v &= ~dex(in);
}
}
void reset(std::initializer_list<TokenID> l) {
for (auto in : l) {
seen &= ~dex(in);
if (dex(in) & (dex(TokenID::Sid) | dex(TokenID::Effect) |
dex(TokenID::Principal) | dex(TokenID::NotPrincipal) |
dex(TokenID::Action) | dex(TokenID::NotAction) |
dex(TokenID::Resource) | dex(TokenID::NotResource) |
dex(TokenID::Condition) | dex(TokenID::AWS) |
dex(TokenID::Federated) | dex(TokenID::Service) |
dex(TokenID::CanonicalUser))) {
v &= ~dex(in);
}
}
}
void reset(uint32_t& v) {
seen &= ~v;
v = 0;
}
PolicyParser(CephContext* cct, const string& tenant, Policy& policy)
: cct(cct), tenant(tenant), policy(policy) {}
PolicyParser(const PolicyParser& policy) = delete;
bool StartObject() {
if (s.empty()) {
s.push_back({this, top});
s.back().objecting = true;
return true;
}
return s.back().obj_start();
}
bool EndObject(SizeType memberCount) {
if (s.empty()) {
return false;
}
return s.back().obj_end();
}
bool Key(const char* str, SizeType length, bool copy) {
if (s.empty()) {
return false;
}
return s.back().key(str, length);
}
bool String(const char* str, SizeType length, bool copy) {
if (s.empty()) {
return false;
}
return s.back().do_string(cct, str, length);
}
bool RawNumber(const char* str, SizeType length, bool copy) {
if (s.empty()) {
return false;
}
return s.back().number(str, length);
}
bool StartArray() {
if (s.empty()) {
return false;
}
return s.back().array_start();
}
bool EndArray(SizeType) {
if (s.empty()) {
return false;
}
return s.back().array_end();
}
bool Default() {
return false;
}
};
// I really despise this misfeature of C++.
//
bool ParseState::obj_end() {
if (objecting) {
objecting = false;
if (!arraying) {
pp->s.pop_back();
} else {
reset();
}
return true;
}
return false;
}
bool ParseState::key(const char* s, size_t l) {
auto token_len = l;
bool ifexists = false;
if (w->id == TokenID::Condition && w->kind == TokenKind::statement) {
static constexpr char IfExists[] = "IfExists";
if (boost::algorithm::ends_with(boost::string_view{s, l}, IfExists)) {
ifexists = true;
token_len -= sizeof(IfExists)-1;
}
}
auto k = pp->tokens.lookup(s, token_len);
if (!k) {
if (w->kind == TokenKind::cond_op) {
auto id = w->id;
auto& t = pp->policy.statements.back();
auto c_ife = cond_ifexists;
pp->s.emplace_back(pp, cond_key);
t.conditions.emplace_back(id, s, l, c_ife);
return true;
} else {
return false;
}
}
// If the token we're going with belongs within the condition at the
// top of the stack and we haven't already encountered it, push it
// on the stack
// Top
if ((((w->id == TokenID::Top) && (k->kind == TokenKind::top)) ||
// Statement
((w->id == TokenID::Statement) && (k->kind == TokenKind::statement)) ||
/// Principal
((w->id == TokenID::Principal || w->id == TokenID::NotPrincipal) &&
(k->kind == TokenKind::princ_type))) &&
// Check that it hasn't been encountered. Note that this
// conjoins with the run of disjunctions above.
!pp->test(k->id)) {
pp->set(k->id);
pp->s.emplace_back(pp, k);
return true;
} else if ((w->id == TokenID::Condition) &&
(k->kind == TokenKind::cond_op)) {
pp->s.emplace_back(pp, k);
pp->s.back().cond_ifexists = ifexists;
return true;
}
return false;
}
// I should just rewrite a few helper functions to use iterators,
// which will make all of this ever so much nicer.
static boost::optional<Principal> parse_principal(CephContext* cct, TokenID t,
string&& s) {
// Wildcard!
if ((t == TokenID::AWS) && (s == "*")) {
return Principal::wildcard();
// Do nothing for now.
} else if (t == TokenID::CanonicalUser) {
// AWS ARNs
} else if (t == TokenID::AWS) {
if (auto a = ARN::parse(s)) {
if (a->resource == "root") {
return Principal::tenant(std::move(a->account));
}
static const char rx_str[] = "([^/]*)/(.*)";
static const regex rx(rx_str, sizeof(rx_str) - 1,
std::regex_constants::ECMAScript |
std::regex_constants::optimize);
smatch match;
if (regex_match(a->resource, match, rx) && match.size() == 3) {
if (match[1] == "user") {
return Principal::user(std::move(a->account),
match[2]);
}
if (match[1] == "role") {
return Principal::role(std::move(a->account),
match[2]);
}
}
} else {
if (std::none_of(s.begin(), s.end(),
[](const char& c) {
return (c == ':') || (c == '/');
})) {
// Since tenants are simply prefixes, there's no really good
// way to see if one exists or not. So we return the thing and
// let them try to match against it.
return Principal::tenant(std::move(s));
}
}
}
ldout(cct, 0) << "Supplied principal is discarded: " << s << dendl;
return boost::none;
}
bool ParseState::do_string(CephContext* cct, const char* s, size_t l) {
auto k = pp->tokens.lookup(s, l);
Policy& p = pp->policy;
bool is_action = false;
bool is_validaction = false;
Statement* t = p.statements.empty() ? nullptr : &(p.statements.back());
// Top level!
if ((w->id == TokenID::Version) && k &&
k->kind == TokenKind::version_key) {
p.version = static_cast<Version>(k->specific);
} else if (w->id == TokenID::Id) {
p.id = string(s, l);
// Statement
} else if (w->id == TokenID::Sid) {
t->sid.emplace(s, l);
} else if ((w->id == TokenID::Effect) && k &&
k->kind == TokenKind::effect_key) {
t->effect = static_cast<Effect>(k->specific);
} else if (w->id == TokenID::Principal && s && *s == '*') {
t->princ.emplace(Principal::wildcard());
} else if (w->id == TokenID::NotPrincipal && s && *s == '*') {
t->noprinc.emplace(Principal::wildcard());
} else if ((w->id == TokenID::Action) ||
(w->id == TokenID::NotAction)) {
is_action = true;
if (*s == '*') {
is_validaction = true;
(w->id == TokenID::Action ?
t->action = allValue : t->notaction = allValue);
} else {
for (auto& p : actpairs) {
if (match_policy({s, l}, p.name, MATCH_POLICY_ACTION)) {
is_validaction = true;
(w->id == TokenID::Action ? t->action[p.bit] = 1 : t->notaction[p.bit] = 1);
}
if ((t->action & s3AllValue) == s3AllValue) {
t->action[s3All] = 1;
}
if ((t->notaction & s3AllValue) == s3AllValue) {
t->notaction[s3All] = 1;
}
if ((t->action & iamAllValue) == iamAllValue) {
t->action[iamAll] = 1;
}
if ((t->notaction & iamAllValue) == iamAllValue) {
t->notaction[iamAll] = 1;
}
if ((t->action & stsAllValue) == stsAllValue) {
t->action[stsAll] = 1;
}
if ((t->notaction & stsAllValue) == stsAllValue) {
t->notaction[stsAll] = 1;
}
}
}
} else if (w->id == TokenID::Resource || w->id == TokenID::NotResource) {
auto a = ARN::parse({s, l}, true);
// You can't specify resources for someone ELSE'S account.
if (a && (a->account.empty() || a->account == pp->tenant ||
a->account == "*")) {
if (a->account.empty() || a->account == "*")
a->account = pp->tenant;
(w->id == TokenID::Resource ? t->resource : t->notresource)
.emplace(std::move(*a));
}
else
ldout(cct, 0) << "Supplied resource is discarded: " << string(s, l)
<< dendl;
} else if (w->kind == TokenKind::cond_key) {
auto& t = pp->policy.statements.back();
t.conditions.back().vals.emplace_back(s, l);
// Principals
} else if (w->kind == TokenKind::princ_type) {
if (pp->s.size() <= 1) {
return false;
}
auto& pri = pp->s[pp->s.size() - 2].w->id == TokenID::Principal ?
t->princ : t->noprinc;
if (auto o = parse_principal(pp->cct, w->id, string(s, l))) {
pri.emplace(std::move(*o));
}
// Failure
} else {
return false;
}
if (!arraying) {
pp->s.pop_back();
}
if (is_action && !is_validaction){
return false;
}
return true;
}
bool ParseState::number(const char* s, size_t l) {
// Top level!
if (w->kind == TokenKind::cond_key) {
auto& t = pp->policy.statements.back();
t.conditions.back().vals.emplace_back(s, l);
// Failure
} else {
return false;
}
if (!arraying) {
pp->s.pop_back();
}
return true;
}
void ParseState::reset() {
pp->reset(pp->v);
}
bool ParseState::obj_start() {
if (w->objectable && !objecting) {
objecting = true;
if (w->id == TokenID::Statement) {
pp->policy.statements.emplace_back();
}
return true;
}
return false;
}
bool ParseState::array_end() {
if (arraying && !objecting) {
pp->s.pop_back();
return true;
}
return false;
}
ostream& operator <<(ostream& m, const MaskedIP& ip) {
// I have a theory about why std::bitset is the way it is.
if (ip.v6) {
for (int i = 7; i >= 0; --i) {
uint16_t hextet = 0;
for (int j = 15; j >= 0; --j) {
hextet |= (ip.addr[(i * 16) + j] << j);
}
m << hex << (unsigned int) hextet;
if (i != 0) {
m << ":";
}
}
} else {
// It involves Satan.
for (int i = 3; i >= 0; --i) {
uint8_t b = 0;
for (int j = 7; j >= 0; --j) {
b |= (ip.addr[(i * 8) + j] << j);
}
m << (unsigned int) b;
if (i != 0) {
m << ".";
}
}
}
m << "/" << dec << ip.prefix;
// It would explain a lot
return m;
}
bool Condition::eval(const Environment& env) const {
auto i = env.find(key);
if (op == TokenID::Null) {
return i == env.end() ? true : false;
}
if (i == env.end()) {
return ifexists;
}
const auto& s = i->second;
switch (op) {
// String!
case TokenID::StringEquals:
return orrible(std::equal_to<std::string>(), s, vals);
case TokenID::StringNotEquals:
return orrible(std::not_fn(std::equal_to<std::string>()),