diff options
Diffstat (limited to 'src/rgw/rgw_common.cc')
| -rw-r--r-- | src/rgw/rgw_common.cc | 2289 |
1 files changed, 2289 insertions, 0 deletions
diff --git a/src/rgw/rgw_common.cc b/src/rgw/rgw_common.cc new file mode 100644 index 000000000..3d09a1e00 --- /dev/null +++ b/src/rgw/rgw_common.cc @@ -0,0 +1,2289 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab ft=cpp + +#include <errno.h> +#include <vector> +#include <algorithm> +#include <string> +#include <boost/tokenizer.hpp> + +#include "json_spirit/json_spirit.h" +#include "common/ceph_json.h" + +#include "rgw_op.h" +#include "rgw_common.h" +#include "rgw_acl.h" +#include "rgw_string.h" +#include "rgw_http_errors.h" +#include "rgw_arn.h" +#include "rgw_data_sync.h" + +#include "common/ceph_crypto.h" +#include "common/armor.h" +#include "common/errno.h" +#include "common/Clock.h" +#include "common/Formatter.h" +#include "common/convenience.h" +#include "common/strtol.h" +#include "include/str_list.h" +#include "rgw_crypt_sanitize.h" +#include "rgw_bucket_sync.h" +#include "rgw_sync_policy.h" + +#include "services/svc_zone.h" + +#include <sstream> + +#define dout_context g_ceph_context +#define dout_subsys ceph_subsys_rgw + +using rgw::ARN; +using rgw::IAM::Effect; +using rgw::IAM::op_to_perm; +using rgw::IAM::Policy; + +const uint32_t RGWBucketInfo::NUM_SHARDS_BLIND_BUCKET(UINT32_MAX); + +rgw_http_errors rgw_http_s3_errors({ + { 0, {200, "" }}, + { STATUS_CREATED, {201, "Created" }}, + { STATUS_ACCEPTED, {202, "Accepted" }}, + { STATUS_NO_CONTENT, {204, "NoContent" }}, + { STATUS_PARTIAL_CONTENT, {206, "" }}, + { ERR_PERMANENT_REDIRECT, {301, "PermanentRedirect" }}, + { ERR_WEBSITE_REDIRECT, {301, "WebsiteRedirect" }}, + { STATUS_REDIRECT, {303, "" }}, + { ERR_NOT_MODIFIED, {304, "NotModified" }}, + { EINVAL, {400, "InvalidArgument" }}, + { ERR_INVALID_REQUEST, {400, "InvalidRequest" }}, + { ERR_INVALID_DIGEST, {400, "InvalidDigest" }}, + { ERR_BAD_DIGEST, {400, "BadDigest" }}, + { ERR_INVALID_LOCATION_CONSTRAINT, {400, "InvalidLocationConstraint" }}, + { ERR_ZONEGROUP_DEFAULT_PLACEMENT_MISCONFIGURATION, {400, "ZonegroupDefaultPlacementMisconfiguration" }}, + { ERR_INVALID_BUCKET_NAME, {400, "InvalidBucketName" }}, + { ERR_INVALID_OBJECT_NAME, {400, "InvalidObjectName" }}, + { ERR_UNRESOLVABLE_EMAIL, {400, "UnresolvableGrantByEmailAddress" }}, + { ERR_INVALID_PART, {400, "InvalidPart" }}, + { ERR_INVALID_PART_ORDER, {400, "InvalidPartOrder" }}, + { ERR_REQUEST_TIMEOUT, {400, "RequestTimeout" }}, + { ERR_TOO_LARGE, {400, "EntityTooLarge" }}, + { ERR_TOO_SMALL, {400, "EntityTooSmall" }}, + { ERR_TOO_MANY_BUCKETS, {400, "TooManyBuckets" }}, + { ERR_MALFORMED_XML, {400, "MalformedXML" }}, + { ERR_AMZ_CONTENT_SHA256_MISMATCH, {400, "XAmzContentSHA256Mismatch" }}, + { ERR_MALFORMED_DOC, {400, "MalformedPolicyDocument"}}, + { ERR_INVALID_TAG, {400, "InvalidTag"}}, + { ERR_MALFORMED_ACL_ERROR, {400, "MalformedACLError" }}, + { ERR_INVALID_CORS_RULES_ERROR, {400, "InvalidRequest" }}, + { ERR_INVALID_WEBSITE_ROUTING_RULES_ERROR, {400, "InvalidRequest" }}, + { ERR_INVALID_ENCRYPTION_ALGORITHM, {400, "InvalidEncryptionAlgorithmError" }}, + { ERR_INVALID_RETENTION_PERIOD,{400, "InvalidRetentionPeriod"}}, + { ERR_LIMIT_EXCEEDED, {400, "LimitExceeded" }}, + { ERR_LENGTH_REQUIRED, {411, "MissingContentLength" }}, + { EACCES, {403, "AccessDenied" }}, + { EPERM, {403, "AccessDenied" }}, + { ERR_SIGNATURE_NO_MATCH, {403, "SignatureDoesNotMatch" }}, + { ERR_INVALID_ACCESS_KEY, {403, "InvalidAccessKeyId" }}, + { ERR_USER_SUSPENDED, {403, "UserSuspended" }}, + { ERR_REQUEST_TIME_SKEWED, {403, "RequestTimeTooSkewed" }}, + { ERR_QUOTA_EXCEEDED, {403, "QuotaExceeded" }}, + { ERR_MFA_REQUIRED, {403, "AccessDenied" }}, + { ENOENT, {404, "NoSuchKey" }}, + { ERR_NO_SUCH_BUCKET, {404, "NoSuchBucket" }}, + { ERR_NO_SUCH_WEBSITE_CONFIGURATION, {404, "NoSuchWebsiteConfiguration" }}, + { ERR_NO_SUCH_UPLOAD, {404, "NoSuchUpload" }}, + { ERR_NOT_FOUND, {404, "Not Found"}}, + { ERR_NO_SUCH_LC, {404, "NoSuchLifecycleConfiguration"}}, + { ERR_NO_SUCH_BUCKET_POLICY, {404, "NoSuchBucketPolicy"}}, + { ERR_NO_SUCH_USER, {404, "NoSuchUser"}}, + { ERR_NO_ROLE_FOUND, {404, "NoSuchEntity"}}, + { ERR_NO_CORS_FOUND, {404, "NoSuchCORSConfiguration"}}, + { ERR_NO_SUCH_SUBUSER, {404, "NoSuchSubUser"}}, + { ERR_NO_SUCH_ENTITY, {404, "NoSuchEntity"}}, + { ERR_NO_SUCH_CORS_CONFIGURATION, {404, "NoSuchCORSConfiguration"}}, + { ERR_NO_SUCH_OBJECT_LOCK_CONFIGURATION, {404, "ObjectLockConfigurationNotFoundError"}}, + { ERR_METHOD_NOT_ALLOWED, {405, "MethodNotAllowed" }}, + { ETIMEDOUT, {408, "RequestTimeout" }}, + { EEXIST, {409, "BucketAlreadyExists" }}, + { ERR_USER_EXIST, {409, "UserAlreadyExists" }}, + { ERR_EMAIL_EXIST, {409, "EmailExists" }}, + { ERR_KEY_EXIST, {409, "KeyExists"}}, + { ERR_TAG_CONFLICT, {409, "OperationAborted"}}, + { ERR_POSITION_NOT_EQUAL_TO_LENGTH, {409, "PositionNotEqualToLength"}}, + { ERR_OBJECT_NOT_APPENDABLE, {409, "ObjectNotAppendable"}}, + { ERR_INVALID_BUCKET_STATE, {409, "InvalidBucketState"}}, + { ERR_INVALID_SECRET_KEY, {400, "InvalidSecretKey"}}, + { ERR_INVALID_KEY_TYPE, {400, "InvalidKeyType"}}, + { ERR_INVALID_CAP, {400, "InvalidCapability"}}, + { ERR_INVALID_TENANT_NAME, {400, "InvalidTenantName" }}, + { ENOTEMPTY, {409, "BucketNotEmpty" }}, + { ERR_PRECONDITION_FAILED, {412, "PreconditionFailed" }}, + { ERANGE, {416, "InvalidRange" }}, + { ERR_UNPROCESSABLE_ENTITY, {422, "UnprocessableEntity" }}, + { ERR_LOCKED, {423, "Locked" }}, + { ERR_INTERNAL_ERROR, {500, "InternalError" }}, + { ERR_NOT_IMPLEMENTED, {501, "NotImplemented" }}, + { ERR_SERVICE_UNAVAILABLE, {503, "ServiceUnavailable"}}, + { ERR_RATE_LIMITED, {503, "SlowDown"}}, + { ERR_ZERO_IN_URL, {400, "InvalidRequest" }}, + { ERR_NO_SUCH_TAG_SET, {404, "NoSuchTagSetError"}}, +}); + +rgw_http_errors rgw_http_swift_errors({ + { EACCES, {403, "AccessDenied" }}, + { EPERM, {401, "AccessDenied" }}, + { ENAMETOOLONG, {400, "Metadata name too long" }}, + { ERR_USER_SUSPENDED, {401, "UserSuspended" }}, + { ERR_INVALID_UTF8, {412, "Invalid UTF8" }}, + { ERR_BAD_URL, {412, "Bad URL" }}, + { ERR_NOT_SLO_MANIFEST, {400, "Not an SLO manifest" }}, + { ERR_QUOTA_EXCEEDED, {413, "QuotaExceeded" }}, + { ENOTEMPTY, {409, "There was a conflict when trying " + "to complete your request." }}, + /* FIXME(rzarzynski): we need to find a way to apply Swift's error handling + * procedures also for ERR_ZERO_IN_URL. This make a problem as the validation + * is performed very early, even before setting the req_state::proto_flags. */ + { ERR_ZERO_IN_URL, {412, "Invalid UTF8 or contains NULL"}}, + { ERR_RATE_LIMITED, {498, "Rate Limited"}}, +}); + +rgw_http_errors rgw_http_sts_errors({ + { ERR_PACKED_POLICY_TOO_LARGE, {400, "PackedPolicyTooLarge" }}, + { ERR_INVALID_IDENTITY_TOKEN, {400, "InvalidIdentityToken" }}, +}); + +rgw_http_errors rgw_http_iam_errors({ + { EINVAL, {400, "InvalidInput" }}, + { ENOENT, {404, "NoSuchEntity"}}, + { ERR_ROLE_EXISTS, {409, "EntityAlreadyExists"}}, + { ERR_DELETE_CONFLICT, {409, "DeleteConflict"}}, + { EEXIST, {409, "EntityAlreadyExists"}}, + { ERR_INTERNAL_ERROR, {500, "ServiceFailure" }}, +}); + +using namespace ceph::crypto; + +rgw_err:: +rgw_err() +{ + clear(); +} + +void rgw_err:: +clear() +{ + http_ret = 200; + ret = 0; + err_code.clear(); +} + +bool rgw_err:: +is_clear() const +{ + return (http_ret == 200); +} + +bool rgw_err:: +is_err() const +{ + return !(http_ret >= 200 && http_ret <= 399); +} + +// The requestURI transferred from the frontend can be abs_path or absoluteURI +// If it is absoluteURI, we should adjust it to abs_path for the following +// S3 authorization and some other processes depending on the requestURI +// The absoluteURI can start with "http://", "https://", "ws://" or "wss://" +static string get_abs_path(const string& request_uri) { + const static string ABS_PREFIXS[] = {"http://", "https://", "ws://", "wss://"}; + bool isAbs = false; + for (int i = 0; i < 4; ++i) { + if (boost::algorithm::starts_with(request_uri, ABS_PREFIXS[i])) { + isAbs = true; + break; + } + } + if (!isAbs) { // it is not a valid absolute uri + return request_uri; + } + size_t beg_pos = request_uri.find("://") + 3; + size_t len = request_uri.size(); + beg_pos = request_uri.find('/', beg_pos); + if (beg_pos == string::npos) return request_uri; + return request_uri.substr(beg_pos, len - beg_pos); +} + +req_info::req_info(CephContext *cct, const class RGWEnv *env) : env(env) { + method = env->get("REQUEST_METHOD", ""); + script_uri = env->get("SCRIPT_URI", cct->_conf->rgw_script_uri.c_str()); + request_uri = env->get("REQUEST_URI", cct->_conf->rgw_request_uri.c_str()); + if (request_uri[0] != '/') { + request_uri = get_abs_path(request_uri); + } + auto pos = request_uri.find('?'); + if (pos != string::npos) { + request_params = request_uri.substr(pos + 1); + request_uri = request_uri.substr(0, pos); + } else { + request_params = env->get("QUERY_STRING", ""); + } + host = env->get("HTTP_HOST", ""); + + // strip off any trailing :port from host (added by CrossFTP and maybe others) + size_t colon_offset = host.find_last_of(':'); + if (colon_offset != string::npos) { + bool all_digits = true; + for (unsigned i = colon_offset + 1; i < host.size(); ++i) { + if (!isdigit(host[i])) { + all_digits = false; + break; + } + } + if (all_digits) { + host.resize(colon_offset); + } + } +} + +void req_info::rebuild_from(req_info& src) +{ + method = src.method; + script_uri = src.script_uri; + args = src.args; + if (src.effective_uri.empty()) { + request_uri = src.request_uri; + } else { + request_uri = src.effective_uri; + } + effective_uri.clear(); + host = src.host; + + x_meta_map = src.x_meta_map; + x_meta_map.erase("x-amz-date"); +} + + +req_state::req_state(CephContext* _cct, RGWEnv* e, uint64_t id) + : cct(_cct), info(_cct, e), id(id) +{ + enable_ops_log = e->get_enable_ops_log(); + enable_usage_log = e->get_enable_usage_log(); + defer_to_bucket_acls = e->get_defer_to_bucket_acls(); + + time = Clock::now(); +} + +req_state::~req_state() { + delete formatter; +} + +std::ostream& req_state::gen_prefix(std::ostream& out) const +{ + auto p = out.precision(); + return out << "req " << id << ' ' + << std::setprecision(3) << std::fixed << time_elapsed() // '0.123s' + << std::setprecision(p) << std::defaultfloat << ' '; +} + +bool search_err(rgw_http_errors& errs, int err_no, int& http_ret, string& code) +{ + auto r = errs.find(err_no); + if (r != errs.end()) { + http_ret = r->second.first; + code = r->second.second; + return true; + } + return false; +} + +void set_req_state_err(struct rgw_err& err, /* out */ + int err_no, /* in */ + const int prot_flags) /* in */ +{ + if (err_no < 0) + err_no = -err_no; + + err.ret = -err_no; + + if (prot_flags & RGW_REST_SWIFT) { + if (search_err(rgw_http_swift_errors, err_no, err.http_ret, err.err_code)) + return; + } + + if (prot_flags & RGW_REST_STS) { + if (search_err(rgw_http_sts_errors, err_no, err.http_ret, err.err_code)) + return; + } + + if (prot_flags & RGW_REST_IAM) { + if (search_err(rgw_http_iam_errors, err_no, err.http_ret, err.err_code)) + return; + } + + //Default to searching in s3 errors + if (search_err(rgw_http_s3_errors, err_no, err.http_ret, err.err_code)) + return; + dout(0) << "WARNING: set_req_state_err err_no=" << err_no + << " resorting to 500" << dendl; + + err.http_ret = 500; + err.err_code = "UnknownError"; +} + +void set_req_state_err(struct req_state* s, int err_no, const string& err_msg) +{ + if (s) { + set_req_state_err(s, err_no); + if (s->prot_flags & RGW_REST_SWIFT && !err_msg.empty()) { + /* TODO(rzarzynski): there never ever should be a check like this one. + * It's here only for the sake of the patch's backportability. Further + * commits will move the logic to a per-RGWHandler replacement of + * the end_header() function. Alternativaly, we might consider making + * that just for the dump(). Please take a look on @cbodley's comments + * in PR #10690 (https://github.com/ceph/ceph/pull/10690). */ + s->err.err_code = err_msg; + } else { + s->err.message = err_msg; + } + } +} + +void set_req_state_err(struct req_state* s, int err_no) +{ + if (s) { + set_req_state_err(s->err, err_no, s->prot_flags); + } +} + +void dump(struct req_state* s) +{ + if (s->format != RGW_FORMAT_HTML) + s->formatter->open_object_section("Error"); + if (!s->err.err_code.empty()) + s->formatter->dump_string("Code", s->err.err_code); + if (!s->err.message.empty()) + s->formatter->dump_string("Message", s->err.message); + if (!s->bucket_name.empty()) // TODO: connect to expose_bucket + s->formatter->dump_string("BucketName", s->bucket_name); + if (!s->trans_id.empty()) // TODO: connect to expose_bucket or another toggle + s->formatter->dump_string("RequestId", s->trans_id); + s->formatter->dump_string("HostId", s->host_id); + if (s->format != RGW_FORMAT_HTML) + s->formatter->close_section(); +} + +struct str_len { + const char *str; + int len; +}; + +#define STR_LEN_ENTRY(s) { s, sizeof(s) - 1 } + +struct str_len meta_prefixes[] = { STR_LEN_ENTRY("HTTP_X_AMZ"), + STR_LEN_ENTRY("HTTP_X_GOOG"), + STR_LEN_ENTRY("HTTP_X_DHO"), + STR_LEN_ENTRY("HTTP_X_RGW"), + STR_LEN_ENTRY("HTTP_X_OBJECT"), + STR_LEN_ENTRY("HTTP_X_CONTAINER"), + STR_LEN_ENTRY("HTTP_X_ACCOUNT"), + {NULL, 0} }; + +void req_info::init_meta_info(const DoutPrefixProvider *dpp, bool *found_bad_meta) +{ + x_meta_map.clear(); + + for (const auto& kv: env->get_map()) { + const char *prefix; + const string& header_name = kv.first; + const string& val = kv.second; + for (int prefix_num = 0; (prefix = meta_prefixes[prefix_num].str) != NULL; prefix_num++) { + int len = meta_prefixes[prefix_num].len; + const char *p = header_name.c_str(); + if (strncmp(p, prefix, len) == 0) { + ldpp_dout(dpp, 10) << "meta>> " << p << dendl; + const char *name = p+len; /* skip the prefix */ + int name_len = header_name.size() - len; + + if (found_bad_meta && strncmp(name, "_META_", name_len) == 0) + *found_bad_meta = true; + + char name_low[meta_prefixes[0].len + name_len + 1]; + snprintf(name_low, meta_prefixes[0].len - 5 + name_len + 1, "%s%s", meta_prefixes[0].str + 5 /* skip HTTP_ */, name); // normalize meta prefix + int j; + for (j = 0; name_low[j]; j++) { + if (name_low[j] != '_') + name_low[j] = tolower(name_low[j]); + else + name_low[j] = '-'; + } + name_low[j] = 0; + + auto it = x_meta_map.find(name_low); + if (it != x_meta_map.end()) { + string old = it->second; + boost::algorithm::trim_right(old); + old.append(","); + old.append(val); + x_meta_map[name_low] = old; + } else { + x_meta_map[name_low] = val; + } + } + } + } + for (const auto& kv: x_meta_map) { + ldpp_dout(dpp, 10) << "x>> " << kv.first << ":" << rgw::crypt_sanitize::x_meta_map{kv.first, kv.second} << dendl; + } +} + +std::ostream& operator<<(std::ostream& oss, const rgw_err &err) +{ + oss << "rgw_err(http_ret=" << err.http_ret << ", err_code='" << err.err_code << "') "; + return oss; +} + +void rgw_add_amz_meta_header( + meta_map_t& x_meta_map, + const std::string& k, + const std::string& v) +{ + auto it = x_meta_map.find(k); + if (it != x_meta_map.end()) { + std::string old = it->second; + boost::algorithm::trim_right(old); + old.append(","); + old.append(v); + x_meta_map[k] = old; + } else { + x_meta_map[k] = v; + } +} + +string rgw_string_unquote(const string& s) +{ + if (s[0] != '"' || s.size() < 2) + return s; + + int len; + for (len = s.size(); len > 2; --len) { + if (s[len - 1] != ' ') + break; + } + + if (s[len-1] != '"') + return s; + + return s.substr(1, len - 2); +} + +static bool check_str_end(const char *s) +{ + if (!s) + return false; + + while (*s) { + if (!isspace(*s)) + return false; + s++; + } + return true; +} + +static bool check_gmt_end(const char *s) +{ + if (!s || !*s) + return false; + + while (isspace(*s)) { + ++s; + } + + /* check for correct timezone */ + if ((strncmp(s, "GMT", 3) != 0) && + (strncmp(s, "UTC", 3) != 0)) { + return false; + } + + return true; +} + +static bool parse_rfc850(const char *s, struct tm *t) +{ + // FIPS zeroization audit 20191115: this memset is not security related. + memset(t, 0, sizeof(*t)); + return check_gmt_end(strptime(s, "%A, %d-%b-%y %H:%M:%S ", t)); +} + +static bool parse_asctime(const char *s, struct tm *t) +{ + // FIPS zeroization audit 20191115: this memset is not security related. + memset(t, 0, sizeof(*t)); + return check_str_end(strptime(s, "%a %b %d %H:%M:%S %Y", t)); +} + +static bool parse_rfc1123(const char *s, struct tm *t) +{ + // FIPS zeroization audit 20191115: this memset is not security related. + memset(t, 0, sizeof(*t)); + return check_gmt_end(strptime(s, "%a, %d %b %Y %H:%M:%S ", t)); +} + +static bool parse_rfc1123_alt(const char *s, struct tm *t) +{ + // FIPS zeroization audit 20191115: this memset is not security related. + memset(t, 0, sizeof(*t)); + return check_str_end(strptime(s, "%a, %d %b %Y %H:%M:%S %z", t)); +} + +bool parse_rfc2616(const char *s, struct tm *t) +{ + return parse_rfc850(s, t) || parse_asctime(s, t) || parse_rfc1123(s, t) || parse_rfc1123_alt(s,t); +} + +bool parse_iso8601(const char *s, struct tm *t, uint32_t *pns, bool extended_format) +{ + // FIPS zeroization audit 20191115: this memset is not security related. + memset(t, 0, sizeof(*t)); + const char *p; + + if (!s) + s = ""; + + if (extended_format) { + p = strptime(s, "%Y-%m-%dT%T", t); + if (!p) { + p = strptime(s, "%Y-%m-%d %T", t); + } + } else { + p = strptime(s, "%Y%m%dT%H%M%S", t); + } + if (!p) { + dout(0) << "parse_iso8601 failed" << dendl; + return false; + } + const std::string_view str = rgw_trim_whitespace(std::string_view(p)); + int len = str.size(); + + if (len == 0 || (len == 1 && str[0] == 'Z')) + return true; + + if (str[0] != '.' || + str[len - 1] != 'Z') + return false; + + uint32_t ms; + std::string_view nsstr = str.substr(1, len - 2); + int r = stringtoul(std::string(nsstr), &ms); + if (r < 0) + return false; + + if (!pns) { + return true; + } + + if (nsstr.size() > 9) { + nsstr = nsstr.substr(0, 9); + } + + uint64_t mul_table[] = { 0, + 100000000LL, + 10000000LL, + 1000000LL, + 100000LL, + 10000LL, + 1000LL, + 100LL, + 10LL, + 1 }; + + + *pns = ms * mul_table[nsstr.size()]; + + return true; +} + +int parse_key_value(string& in_str, const char *delim, string& key, string& val) +{ + if (delim == NULL) + return -EINVAL; + + auto pos = in_str.find(delim); + if (pos == string::npos) + return -EINVAL; + + key = rgw_trim_whitespace(in_str.substr(0, pos)); + val = rgw_trim_whitespace(in_str.substr(pos + 1)); + + return 0; +} + +int parse_key_value(string& in_str, string& key, string& val) +{ + return parse_key_value(in_str, "=", key,val); +} + +boost::optional<std::pair<std::string_view, std::string_view>> +parse_key_value(const std::string_view& in_str, + const std::string_view& delim) +{ + const size_t pos = in_str.find(delim); + if (pos == std::string_view::npos) { + return boost::none; + } + + const auto key = rgw_trim_whitespace(in_str.substr(0, pos)); + const auto val = rgw_trim_whitespace(in_str.substr(pos + 1)); + + return std::make_pair(key, val); +} + +boost::optional<std::pair<std::string_view, std::string_view>> +parse_key_value(const std::string_view& in_str) +{ + return parse_key_value(in_str, "="); +} + +int parse_time(const char *time_str, real_time *time) +{ + struct tm tm; + uint32_t ns = 0; + + if (!parse_rfc2616(time_str, &tm) && !parse_iso8601(time_str, &tm, &ns)) { + return -EINVAL; + } + + time_t sec = internal_timegm(&tm); + *time = utime_t(sec, ns).to_real_time(); + + return 0; +} + +#define TIME_BUF_SIZE 128 + +void rgw_to_iso8601(const real_time& t, char *dest, int buf_size) +{ + utime_t ut(t); + + char buf[TIME_BUF_SIZE]; + struct tm result; + time_t epoch = ut.sec(); + struct tm *tmp = gmtime_r(&epoch, &result); + if (tmp == NULL) + return; + + if (strftime(buf, sizeof(buf), "%Y-%m-%dT%T", tmp) == 0) + return; + + snprintf(dest, buf_size, "%s.%03dZ", buf, (int)(ut.usec() / 1000)); +} + +void rgw_to_iso8601(const real_time& t, string *dest) +{ + char buf[TIME_BUF_SIZE]; + rgw_to_iso8601(t, buf, sizeof(buf)); + *dest = buf; +} + + +string rgw_to_asctime(const utime_t& t) +{ + stringstream s; + t.asctime(s); + return s.str(); +} + +/* + * calculate the sha1 value of a given msg and key + */ +void calc_hmac_sha1(const char *key, int key_len, + const char *msg, int msg_len, char *dest) +/* destination should be CEPH_CRYPTO_HMACSHA1_DIGESTSIZE bytes long */ +{ + HMACSHA1 hmac((const unsigned char *)key, key_len); + hmac.Update((const unsigned char *)msg, msg_len); + hmac.Final((unsigned char *)dest); +} + +/* + * calculate the sha256 value of a given msg and key + */ +void calc_hmac_sha256(const char *key, int key_len, + const char *msg, int msg_len, char *dest) +{ + char hash_sha256[CEPH_CRYPTO_HMACSHA256_DIGESTSIZE]; + + HMACSHA256 hmac((const unsigned char *)key, key_len); + hmac.Update((const unsigned char *)msg, msg_len); + hmac.Final((unsigned char *)hash_sha256); + + memcpy(dest, hash_sha256, CEPH_CRYPTO_HMACSHA256_DIGESTSIZE); +} + +using ceph::crypto::SHA256; + +/* + * calculate the sha256 hash value of a given msg + */ +sha256_digest_t calc_hash_sha256(const std::string_view& msg) +{ + sha256_digest_t hash; + + SHA256 hasher; + hasher.Update(reinterpret_cast<const unsigned char*>(msg.data()), msg.size()); + hasher.Final(hash.v); + + return hash; +} + +SHA256* calc_hash_sha256_open_stream() +{ + return new SHA256; +} + +void calc_hash_sha256_update_stream(SHA256 *hash, const char *msg, int len) +{ + hash->Update((const unsigned char *)msg, len); +} + +string calc_hash_sha256_close_stream(SHA256 **phash) +{ + SHA256 *hash = *phash; + if (!hash) { + hash = calc_hash_sha256_open_stream(); + } + char hash_sha256[CEPH_CRYPTO_HMACSHA256_DIGESTSIZE]; + + hash->Final((unsigned char *)hash_sha256); + + char hex_str[(CEPH_CRYPTO_SHA256_DIGESTSIZE * 2) + 1]; + buf_to_hex((unsigned char *)hash_sha256, CEPH_CRYPTO_SHA256_DIGESTSIZE, hex_str); + + delete hash; + *phash = NULL; + + return std::string(hex_str); +} + +std::string calc_hash_sha256_restart_stream(SHA256 **phash) +{ + const auto hash = calc_hash_sha256_close_stream(phash); + *phash = calc_hash_sha256_open_stream(); + + return hash; +} + +int NameVal::parse() +{ + auto delim_pos = str.find('='); + int ret = 0; + + if (delim_pos == string::npos) { + name = str; + val = ""; + ret = 1; + } else { + name = str.substr(0, delim_pos); + val = str.substr(delim_pos + 1); + } + + return ret; +} + +int RGWHTTPArgs::parse(const DoutPrefixProvider *dpp) +{ + int pos = 0; + bool end = false; + + if (str.empty()) + return 0; + + if (str[pos] == '?') + pos++; + + while (!end) { + int fpos = str.find('&', pos); + if (fpos < pos) { + end = true; + fpos = str.size(); + } + std::string nameval = url_decode(str.substr(pos, fpos - pos), true); + NameVal nv(std::move(nameval)); + int ret = nv.parse(); + if (ret >= 0) { + string& name = nv.get_name(); + if (name.find("X-Amz-") != string::npos) { + std::for_each(name.begin(), + name.end(), + [](char &c){ + if (c != '-') { + c = ::tolower(static_cast<unsigned char>(c)); + } + }); + } + string& val = nv.get_val(); + ldpp_dout(dpp, 10) << "name: " << name << " val: " << val << dendl; + append(name, val); + } + + pos = fpos + 1; + } + + return 0; +} + +void RGWHTTPArgs::append(const string& name, const string& val) +{ + if (name.compare(0, sizeof(RGW_SYS_PARAM_PREFIX) - 1, RGW_SYS_PARAM_PREFIX) == 0) { + sys_val_map[name] = val; + } else { + val_map[name] = val; + } + + if ((name.compare("acl") == 0) || + (name.compare("cors") == 0) || + (name.compare("notification") == 0) || + (name.compare("location") == 0) || + (name.compare("logging") == 0) || + (name.compare("usage") == 0) || + (name.compare("lifecycle") == 0) || + (name.compare("delete") == 0) || + (name.compare("uploads") == 0) || + (name.compare("partNumber") == 0) || + (name.compare("uploadId") == 0) || + (name.compare("versionId") == 0) || + (name.compare("start-date") == 0) || + (name.compare("end-date") == 0) || + (name.compare("versions") == 0) || + (name.compare("versioning") == 0) || + (name.compare("website") == 0) || + (name.compare("requestPayment") == 0) || + (name.compare("torrent") == 0) || + (name.compare("tagging") == 0) || + (name.compare("append") == 0) || + (name.compare("position") == 0) || + (name.compare("policyStatus") == 0) || + (name.compare("publicAccessBlock") == 0)) { + sub_resources[name] = val; + } else if (name[0] == 'r') { // root of all evil + if ((name.compare("response-content-type") == 0) || + (name.compare("response-content-language") == 0) || + (name.compare("response-expires") == 0) || + (name.compare("response-cache-control") == 0) || + (name.compare("response-content-disposition") == 0) || + (name.compare("response-content-encoding") == 0)) { + sub_resources[name] = val; + has_resp_modifier = true; + } + } else if ((name.compare("subuser") == 0) || + (name.compare("key") == 0) || + (name.compare("caps") == 0) || + (name.compare("index") == 0) || + (name.compare("policy") == 0) || + (name.compare("quota") == 0) || + (name.compare("list") == 0) || + (name.compare("object") == 0) || + (name.compare("sync") == 0)) { + if (!admin_subresource_added) { + sub_resources[name] = ""; + admin_subresource_added = true; + } + } +} + +const string& RGWHTTPArgs::get(const string& name, bool *exists) const +{ + auto iter = val_map.find(name); + bool e = (iter != std::end(val_map)); + if (exists) + *exists = e; + if (e) + return iter->second; + return empty_str; +} + +boost::optional<const std::string&> +RGWHTTPArgs::get_optional(const std::string& name) const +{ + bool exists; + const std::string& value = get(name, &exists); + if (exists) { + return value; + } else { + return boost::none; + } +} + +int RGWHTTPArgs::get_bool(const string& name, bool *val, bool *exists) +{ + map<string, string>::iterator iter; + iter = val_map.find(name); + bool e = (iter != val_map.end()); + if (exists) + *exists = e; + + if (e) { + const char *s = iter->second.c_str(); + + if (strcasecmp(s, "false") == 0) { + *val = false; + } else if (strcasecmp(s, "true") == 0) { + *val = true; + } else { + return -EINVAL; + } + } + + return 0; +} + +int RGWHTTPArgs::get_bool(const char *name, bool *val, bool *exists) +{ + string s(name); + return get_bool(s, val, exists); +} + +void RGWHTTPArgs::get_bool(const char *name, bool *val, bool def_val) +{ + bool exists = false; + if ((get_bool(name, val, &exists) < 0) || + !exists) { + *val = def_val; + } +} + +int RGWHTTPArgs::get_int(const char *name, int *val, int def_val) +{ + bool exists = false; + string val_str; + val_str = get(name, &exists); + if (!exists) { + *val = def_val; + return 0; + } + + string err; + + *val = (int)strict_strtol(val_str.c_str(), 10, &err); + if (!err.empty()) { + *val = def_val; + return -EINVAL; + } + return 0; +} + +string RGWHTTPArgs::sys_get(const string& name, bool * const exists) const +{ + const auto iter = sys_val_map.find(name); + const bool e = (iter != sys_val_map.end()); + + if (exists) { + *exists = e; + } + + return e ? iter->second : string(); +} + +bool rgw_transport_is_secure(CephContext *cct, const RGWEnv& env) +{ + const auto& m = env.get_map(); + // frontend connected with ssl + if (m.count("SERVER_PORT_SECURE")) { + return true; + } + // ignore proxy headers unless explicitly enabled + if (!cct->_conf->rgw_trust_forwarded_https) { + return false; + } + // https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Forwarded + // Forwarded: by=<identifier>; for=<identifier>; host=<host>; proto=<http|https> + auto i = m.find("HTTP_FORWARDED"); + if (i != m.end() && i->second.find("proto=https") != std::string::npos) { + return true; + } + // https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Forwarded-Proto + i = m.find("HTTP_X_FORWARDED_PROTO"); + if (i != m.end() && i->second == "https") { + return true; + } + return false; +} + + +namespace { + +struct perm_state_from_req_state : public perm_state_base { + req_state * const s; + perm_state_from_req_state(req_state * const _s) + : perm_state_base(_s->cct, + _s->env, + _s->auth.identity.get(), + _s->bucket.get() ? _s->bucket->get_info() : RGWBucketInfo(), + _s->perm_mask, + _s->defer_to_bucket_acls, + _s->bucket_access_conf), + s(_s) {} + + std::optional<bool> get_request_payer() const override { + const char *request_payer = s->info.env->get("HTTP_X_AMZ_REQUEST_PAYER"); + if (!request_payer) { + bool exists; + request_payer = s->info.args.get("x-amz-request-payer", &exists).c_str(); + if (!exists) { + return false; + } + } + + if (strcasecmp(request_payer, "requester") == 0) { + return true; + } + + return std::nullopt; + } + + const char *get_referer() const override { + return s->info.env->get("HTTP_REFERER"); + } +}; + +Effect eval_or_pass(const boost::optional<Policy>& policy, + const rgw::IAM::Environment& env, + boost::optional<const rgw::auth::Identity&> id, + const uint64_t op, + const ARN& arn, + boost::optional<rgw::IAM::PolicyPrincipal&> princ_type=boost::none) { + if (!policy) + return Effect::Pass; + else + return policy->eval(env, id, op, arn, princ_type); +} + +} + +Effect eval_identity_or_session_policies(const vector<Policy>& policies, + const rgw::IAM::Environment& env, + boost::optional<const rgw::auth::Identity&> id, + const uint64_t op, + const ARN& arn) { + auto policy_res = Effect::Pass, prev_res = Effect::Pass; + for (auto& policy : policies) { + if (policy_res = eval_or_pass(policy, env, id, op, arn); policy_res == Effect::Deny) + return policy_res; + else if (policy_res == Effect::Allow) + prev_res = Effect::Allow; + else if (policy_res == Effect::Pass && prev_res == Effect::Allow) + policy_res = Effect::Allow; + } + return policy_res; +} + +bool verify_user_permission(const DoutPrefixProvider* dpp, + perm_state_base * const s, + RGWAccessControlPolicy * const user_acl, + const vector<rgw::IAM::Policy>& user_policies, + const rgw::ARN& res, + const uint64_t op) +{ + auto usr_policy_res = eval_identity_or_session_policies(user_policies, s->env, boost::none, op, res); + if (usr_policy_res == Effect::Deny) { + return false; + } + + if (usr_policy_res == Effect::Allow) { + return true; + } + + if (op == rgw::IAM::s3CreateBucket || op == rgw::IAM::s3ListAllMyBuckets) { + auto perm = op_to_perm(op); + + return verify_user_permission_no_policy(dpp, s, user_acl, perm); + } + + return false; +} + +bool verify_user_permission_no_policy(const DoutPrefixProvider* dpp, + struct perm_state_base * const s, + RGWAccessControlPolicy * const user_acl, + const int perm) +{ + if (s->identity->get_identity_type() == TYPE_ROLE) + return false; + + /* S3 doesn't support account ACLs. */ + if (!user_acl) + return true; + + if ((perm & (int)s->perm_mask) != perm) + return false; + + return user_acl->verify_permission(dpp, *s->identity, perm, perm); +} + +bool verify_user_permission(const DoutPrefixProvider* dpp, + struct req_state * const s, + const rgw::ARN& res, + const uint64_t op) +{ + perm_state_from_req_state ps(s); + return verify_user_permission(dpp, &ps, s->user_acl.get(), s->iam_user_policies, res, op); +} + +bool verify_user_permission_no_policy(const DoutPrefixProvider* dpp, + struct req_state * const s, + const int perm) +{ + perm_state_from_req_state ps(s); + return verify_user_permission_no_policy(dpp, &ps, s->user_acl.get(), perm); +} + +bool verify_requester_payer_permission(struct perm_state_base *s) +{ + if (!s->bucket_info.requester_pays) + return true; + + if (s->identity->is_owner_of(s->bucket_info.owner)) + return true; + + if (s->identity->is_anonymous()) { + return false; + } + + auto request_payer = s->get_request_payer(); + if (request_payer) { + return *request_payer; + } + + return false; +} + +bool verify_bucket_permission(const DoutPrefixProvider* dpp, + struct perm_state_base * const s, + const rgw_bucket& bucket, + RGWAccessControlPolicy * const user_acl, + RGWAccessControlPolicy * const bucket_acl, + const boost::optional<Policy>& bucket_policy, + const vector<Policy>& identity_policies, + const vector<Policy>& session_policies, + const uint64_t op) +{ + if (!verify_requester_payer_permission(s)) + return false; + + auto identity_policy_res = eval_identity_or_session_policies(identity_policies, s->env, boost::none, op, ARN(bucket)); + if (identity_policy_res == Effect::Deny) + return false; + + rgw::IAM::PolicyPrincipal princ_type = rgw::IAM::PolicyPrincipal::Other; + auto r = eval_or_pass(bucket_policy, s->env, *s->identity, + op, ARN(bucket), princ_type); + if (r == Effect::Deny) + return false; + + //Take into account session policies, if the identity making a request is a role + if (!session_policies.empty()) { + auto session_policy_res = eval_identity_or_session_policies(session_policies, s->env, boost::none, op, ARN(bucket)); + if (session_policy_res == Effect::Deny) { + return false; + } + if (princ_type == rgw::IAM::PolicyPrincipal::Role) { + //Intersection of session policy and identity policy plus intersection of session policy and bucket policy + if ((session_policy_res == Effect::Allow && identity_policy_res == Effect::Allow) || + (session_policy_res == Effect::Allow && r == Effect::Allow)) + return true; + } else if (princ_type == rgw::IAM::PolicyPrincipal::Session) { + //Intersection of session policy and identity policy plus bucket policy + if ((session_policy_res == Effect::Allow && identity_policy_res == Effect::Allow) || r == Effect::Allow) + return true; + } else if (princ_type == rgw::IAM::PolicyPrincipal::Other) {// there was no match in the bucket policy + if (session_policy_res == Effect::Allow && identity_policy_res == Effect::Allow) + return true; + } + return false; + } + + if (r == Effect::Allow || identity_policy_res == Effect::Allow) + // It looks like S3 ACLs only GRANT permissions rather than + // denying them, so this should be safe. + return true; + + const auto perm = op_to_perm(op); + + return verify_bucket_permission_no_policy(dpp, s, user_acl, bucket_acl, perm); +} + +bool verify_bucket_permission(const DoutPrefixProvider* dpp, + struct req_state * const s, + const rgw_bucket& bucket, + RGWAccessControlPolicy * const user_acl, + RGWAccessControlPolicy * const bucket_acl, + const boost::optional<Policy>& bucket_policy, + const vector<Policy>& user_policies, + const vector<Policy>& session_policies, + const uint64_t op) +{ + perm_state_from_req_state ps(s); + return verify_bucket_permission(dpp, &ps, bucket, + user_acl, bucket_acl, + bucket_policy, user_policies, + session_policies, op); +} + +bool verify_bucket_permission_no_policy(const DoutPrefixProvider* dpp, struct perm_state_base * const s, + RGWAccessControlPolicy * const user_acl, + RGWAccessControlPolicy * const bucket_acl, + const int perm) +{ + if (!bucket_acl) + return false; + + if ((perm & (int)s->perm_mask) != perm) + return false; + + if (bucket_acl->verify_permission(dpp, *s->identity, perm, perm, + s->get_referer(), + s->bucket_access_conf && + s->bucket_access_conf->ignore_public_acls())) + return true; + + if (!user_acl) + return false; + + return user_acl->verify_permission(dpp, *s->identity, perm, perm); +} + +bool verify_bucket_permission_no_policy(const DoutPrefixProvider* dpp, struct req_state * const s, + RGWAccessControlPolicy * const user_acl, + RGWAccessControlPolicy * const bucket_acl, + const int perm) +{ + perm_state_from_req_state ps(s); + return verify_bucket_permission_no_policy(dpp, + &ps, + user_acl, + bucket_acl, + perm); +} + +bool verify_bucket_permission_no_policy(const DoutPrefixProvider* dpp, struct req_state * const s, const int perm) +{ + perm_state_from_req_state ps(s); + + if (!verify_requester_payer_permission(&ps)) + return false; + + return verify_bucket_permission_no_policy(dpp, + &ps, + s->user_acl.get(), + s->bucket_acl.get(), + perm); +} + +bool verify_bucket_permission(const DoutPrefixProvider* dpp, struct req_state * const s, const uint64_t op) +{ + if (rgw::sal::RGWBucket::empty(s->bucket)) { + // request is missing a bucket name + return false; + } + + perm_state_from_req_state ps(s); + + return verify_bucket_permission(dpp, + &ps, + s->bucket->get_key(), + s->user_acl.get(), + s->bucket_acl.get(), + s->iam_policy, + s->iam_user_policies, + s->session_policies, + op); +} + +// Authorize anyone permitted by the bucket policy, identity policies, session policies and the bucket owner +// unless explicitly denied by the policy. + +int verify_bucket_owner_or_policy(struct req_state* const s, + const uint64_t op) +{ + auto identity_policy_res = eval_identity_or_session_policies(s->iam_user_policies, s->env, boost::none, op, ARN(s->bucket->get_key())); + if (identity_policy_res == Effect::Deny) { + return -EACCES; + } + + rgw::IAM::PolicyPrincipal princ_type = rgw::IAM::PolicyPrincipal::Other; + auto e = eval_or_pass(s->iam_policy, + s->env, *s->auth.identity, + op, ARN(s->bucket->get_key()), princ_type); + if (e == Effect::Deny) { + return -EACCES; + } + + if (!s->session_policies.empty()) { + auto session_policy_res = eval_identity_or_session_policies(s->session_policies, s->env, boost::none, op, ARN(s->bucket->get_key())); + if (session_policy_res == Effect::Deny) { + return -EACCES; + } + if (princ_type == rgw::IAM::PolicyPrincipal::Role) { + //Intersection of session policy and identity policy plus intersection of session policy and bucket policy + if ((session_policy_res == Effect::Allow && identity_policy_res == Effect::Allow) || + (session_policy_res == Effect::Allow && e == Effect::Allow)) + return 0; + } else if (princ_type == rgw::IAM::PolicyPrincipal::Session) { + //Intersection of session policy and identity policy plus bucket policy + if ((session_policy_res == Effect::Allow && identity_policy_res == Effect::Allow) || e == Effect::Allow) + return 0; + } else if (princ_type == rgw::IAM::PolicyPrincipal::Other) {// there was no match in the bucket policy + if (session_policy_res == Effect::Allow && identity_policy_res == Effect::Allow) + return 0; + } + return -EACCES; + } + + if (e == Effect::Allow || + identity_policy_res == Effect::Allow || + (e == Effect::Pass && + identity_policy_res == Effect::Pass && + s->auth.identity->is_owner_of(s->bucket_owner.get_id()))) { + return 0; + } else { + return -EACCES; + } +} + + +static inline bool check_deferred_bucket_perms(const DoutPrefixProvider* dpp, + struct perm_state_base * const s, + const rgw_bucket& bucket, + RGWAccessControlPolicy * const user_acl, + RGWAccessControlPolicy * const bucket_acl, + const boost::optional<Policy>& bucket_policy, + const vector<Policy>& identity_policies, + const vector<Policy>& session_policies, + const uint8_t deferred_check, + const uint64_t op) +{ + return (s->defer_to_bucket_acls == deferred_check \ + && verify_bucket_permission(dpp, s, bucket, user_acl, bucket_acl, bucket_policy, identity_policies, session_policies,op)); +} + +static inline bool check_deferred_bucket_only_acl(const DoutPrefixProvider* dpp, + struct perm_state_base * const s, + RGWAccessControlPolicy * const user_acl, + RGWAccessControlPolicy * const bucket_acl, + const uint8_t deferred_check, + const int perm) +{ + return (s->defer_to_bucket_acls == deferred_check \ + && verify_bucket_permission_no_policy(dpp, s, user_acl, bucket_acl, perm)); +} + +bool verify_object_permission(const DoutPrefixProvider* dpp, struct perm_state_base * const s, + const rgw_obj& obj, + RGWAccessControlPolicy * const user_acl, + RGWAccessControlPolicy * const bucket_acl, + RGWAccessControlPolicy * const object_acl, + const boost::optional<Policy>& bucket_policy, + const vector<Policy>& identity_policies, + const vector<Policy>& session_policies, + const uint64_t op) +{ + if (!verify_requester_payer_permission(s)) + return false; + + auto identity_policy_res = eval_identity_or_session_policies(identity_policies, s->env, boost::none, op, ARN(obj)); + if (identity_policy_res == Effect::Deny) + return false; + + rgw::IAM::PolicyPrincipal princ_type = rgw::IAM::PolicyPrincipal::Other; + auto r = eval_or_pass(bucket_policy, s->env, *s->identity, op, ARN(obj), princ_type); + if (r == Effect::Deny) + return false; + + if (!session_policies.empty()) { + auto session_policy_res = eval_identity_or_session_policies(session_policies, s->env, boost::none, op, ARN(obj)); + if (session_policy_res == Effect::Deny) { + return false; + } + if (princ_type == rgw::IAM::PolicyPrincipal::Role) { + //Intersection of session policy and identity policy plus intersection of session policy and bucket policy + if ((session_policy_res == Effect::Allow && identity_policy_res == Effect::Allow) || + (session_policy_res == Effect::Allow && r == Effect::Allow)) + return true; + } else if (princ_type == rgw::IAM::PolicyPrincipal::Session) { + //Intersection of session policy and identity policy plus bucket policy + if ((session_policy_res == Effect::Allow && identity_policy_res == Effect::Allow) || r == Effect::Allow) + return true; + } else if (princ_type == rgw::IAM::PolicyPrincipal::Other) {// there was no match in the bucket policy + if (session_policy_res == Effect::Allow && identity_policy_res == Effect::Allow) + return true; + } + return false; + } + + if (r == Effect::Allow || identity_policy_res == Effect::Allow) + // It looks like S3 ACLs only GRANT permissions rather than + // denying them, so this should be safe. + return true; + + const auto perm = op_to_perm(op); + + if (check_deferred_bucket_perms(dpp, s, obj.bucket, user_acl, bucket_acl, bucket_policy, + identity_policies, session_policies, RGW_DEFER_TO_BUCKET_ACLS_RECURSE, op) || + check_deferred_bucket_perms(dpp, s, obj.bucket, user_acl, bucket_acl, bucket_policy, + identity_policies, session_policies, RGW_DEFER_TO_BUCKET_ACLS_FULL_CONTROL, rgw::IAM::s3All)) { + return true; + } + + if (!object_acl) { + return false; + } + + bool ret = object_acl->verify_permission(dpp, *s->identity, s->perm_mask, perm, + nullptr, /* http_referrer */ + s->bucket_access_conf && + s->bucket_access_conf->ignore_public_acls()); + if (ret) { + return true; + } + + if (!s->cct->_conf->rgw_enforce_swift_acls) + return ret; + + if ((perm & (int)s->perm_mask) != perm) + return false; + + int swift_perm = 0; + if (perm & (RGW_PERM_READ | RGW_PERM_READ_ACP)) + swift_perm |= RGW_PERM_READ_OBJS; + if (perm & RGW_PERM_WRITE) + swift_perm |= RGW_PERM_WRITE_OBJS; + + if (!swift_perm) + return false; + + /* we already verified the user mask above, so we pass swift_perm as the mask here, + otherwise the mask might not cover the swift permissions bits */ + if (bucket_acl->verify_permission(dpp, *s->identity, swift_perm, swift_perm, + s->get_referer())) + return true; + + if (!user_acl) + return false; + + return user_acl->verify_permission(dpp, *s->identity, swift_perm, swift_perm); +} + +bool verify_object_permission(const DoutPrefixProvider* dpp, struct req_state * const s, + const rgw_obj& obj, + RGWAccessControlPolicy * const user_acl, + RGWAccessControlPolicy * const bucket_acl, + RGWAccessControlPolicy * const object_acl, + const boost::optional<Policy>& bucket_policy, + const vector<Policy>& identity_policies, + const vector<Policy>& session_policies, + const uint64_t op) +{ + perm_state_from_req_state ps(s); + return verify_object_permission(dpp, &ps, obj, + user_acl, bucket_acl, + object_acl, bucket_policy, + identity_policies, session_policies, op); +} + +bool verify_object_permission_no_policy(const DoutPrefixProvider* dpp, + struct perm_state_base * const s, + RGWAccessControlPolicy * const user_acl, + RGWAccessControlPolicy * const bucket_acl, + RGWAccessControlPolicy * const object_acl, + const int perm) +{ + if (check_deferred_bucket_only_acl(dpp, s, user_acl, bucket_acl, RGW_DEFER_TO_BUCKET_ACLS_RECURSE, perm) || + check_deferred_bucket_only_acl(dpp, s, user_acl, bucket_acl, RGW_DEFER_TO_BUCKET_ACLS_FULL_CONTROL, RGW_PERM_FULL_CONTROL)) { + return true; + } + + if (!object_acl) { + return false; + } + + bool ret = object_acl->verify_permission(dpp, *s->identity, s->perm_mask, perm, + nullptr, /* http referrer */ + s->bucket_access_conf && + s->bucket_access_conf->ignore_public_acls()); + if (ret) { + return true; + } + + if (!s->cct->_conf->rgw_enforce_swift_acls) + return ret; + + if ((perm & (int)s->perm_mask) != perm) + return false; + + int swift_perm = 0; + if (perm & (RGW_PERM_READ | RGW_PERM_READ_ACP)) + swift_perm |= RGW_PERM_READ_OBJS; + if (perm & RGW_PERM_WRITE) + swift_perm |= RGW_PERM_WRITE_OBJS; + + if (!swift_perm) + return false; + + /* we already verified the user mask above, so we pass swift_perm as the mask here, + otherwise the mask might not cover the swift permissions bits */ + if (bucket_acl->verify_permission(dpp, *s->identity, swift_perm, swift_perm, + s->get_referer())) + return true; + + if (!user_acl) + return false; + + return user_acl->verify_permission(dpp, *s->identity, swift_perm, swift_perm); +} + +bool verify_object_permission_no_policy(const DoutPrefixProvider* dpp, struct req_state *s, int perm) +{ + perm_state_from_req_state ps(s); + + if (!verify_requester_payer_permission(&ps)) + return false; + + return verify_object_permission_no_policy(dpp, + &ps, + s->user_acl.get(), + s->bucket_acl.get(), + s->object_acl.get(), + perm); +} + +bool verify_object_permission(const DoutPrefixProvider* dpp, struct req_state *s, uint64_t op) +{ + perm_state_from_req_state ps(s); + + return verify_object_permission(dpp, + &ps, + rgw_obj(s->bucket->get_key(), s->object->get_key()), + s->user_acl.get(), + s->bucket_acl.get(), + s->object_acl.get(), + s->iam_policy, + s->iam_user_policies, + s->session_policies, + op); +} + + +int verify_object_lock(const DoutPrefixProvider* dpp, const rgw::sal::RGWAttrs& attrs, const bool bypass_perm, const bool bypass_governance_mode) { + auto aiter = attrs.find(RGW_ATTR_OBJECT_RETENTION); + if (aiter != attrs.end()) { + RGWObjectRetention obj_retention; + try { + decode(obj_retention, aiter->second); + } catch (buffer::error& err) { + ldpp_dout(dpp, 0) << "ERROR: failed to decode RGWObjectRetention" << dendl; + return -EIO; + } + if (ceph::real_clock::to_time_t(obj_retention.get_retain_until_date()) > ceph_clock_now()) { + if (obj_retention.get_mode().compare("GOVERNANCE") != 0 || !bypass_perm || !bypass_governance_mode) { + return -EACCES; + } + } + } + aiter = attrs.find(RGW_ATTR_OBJECT_LEGAL_HOLD); + if (aiter != attrs.end()) { + RGWObjectLegalHold obj_legal_hold; + try { + decode(obj_legal_hold, aiter->second); + } catch (buffer::error& err) { + ldpp_dout(dpp, 0) << "ERROR: failed to decode RGWObjectLegalHold" << dendl; + return -EIO; + } + if (obj_legal_hold.is_enabled()) { + return -EACCES; + } + } + + return 0; +} + + +class HexTable +{ + char table[256]; + +public: + HexTable() { + // FIPS zeroization audit 20191115: this memset is not security related. + memset(table, -1, sizeof(table)); + int i; + for (i = '0'; i<='9'; i++) + table[i] = i - '0'; + for (i = 'A'; i<='F'; i++) + table[i] = i - 'A' + 0xa; + for (i = 'a'; i<='f'; i++) + table[i] = i - 'a' + 0xa; + } + + char to_num(char c) { + return table[(int)c]; + } +}; + +static char hex_to_num(char c) +{ + static HexTable hex_table; + return hex_table.to_num(c); +} + +std::string url_decode(const std::string_view& src_str, bool in_query) +{ + std::string dest_str; + dest_str.reserve(src_str.length() + 1); + + for (auto src = std::begin(src_str); src != std::end(src_str); ++src) { + if (*src != '%') { + if (!in_query || *src != '+') { + if (*src == '?') { + in_query = true; + } + dest_str.push_back(*src); + } else { + dest_str.push_back(' '); + } + } else { + /* 3 == strlen("%%XX") */ + if (std::distance(src, std::end(src_str)) < 3) { + break; + } + + src++; + const char c1 = hex_to_num(*src++); + const char c2 = hex_to_num(*src); + if (c1 < 0 || c2 < 0) { + return std::string(); + } else { + dest_str.push_back(c1 << 4 | c2); + } + } + } + + return dest_str; +} + +void rgw_uri_escape_char(char c, string& dst) +{ + char buf[16]; + snprintf(buf, sizeof(buf), "%%%.2X", (int)(unsigned char)c); + dst.append(buf); +} + +static bool char_needs_url_encoding(char c) +{ + if (c <= 0x20 || c >= 0x7f) + return true; + + switch (c) { + case 0x22: + case 0x23: + case 0x25: + case 0x26: + case 0x2B: + case 0x2C: + case 0x2F: + case 0x3A: + case 0x3B: + case 0x3C: + case 0x3E: + case 0x3D: + case 0x3F: + case 0x40: + case 0x5B: + case 0x5D: + case 0x5C: + case 0x5E: + case 0x60: + case 0x7B: + case 0x7D: + return true; + } + return false; +} + +void url_encode(const string& src, string& dst, bool encode_slash) +{ + const char *p = src.c_str(); + for (unsigned i = 0; i < src.size(); i++, p++) { + if ((!encode_slash && *p == 0x2F) || !char_needs_url_encoding(*p)) { + dst.append(p, 1); + }else { + rgw_uri_escape_char(*p, dst); + } + } +} + +std::string url_encode(const std::string& src, bool encode_slash) +{ + std::string dst; + url_encode(src, dst, encode_slash); + + return dst; +} + +std::string url_remove_prefix(const std::string& url) +{ + std::string dst = url; + auto pos = dst.find("http://"); + if (pos == std::string::npos) { + pos = dst.find("https://"); + if (pos != std::string::npos) { + dst.erase(pos, 8); + } else { + pos = dst.find("www."); + if (pos != std::string::npos) { + dst.erase(pos, 4); + } + } + } else { + dst.erase(pos, 7); + } + + return dst; +} + +string rgw_trim_whitespace(const string& src) +{ + if (src.empty()) { + return string(); + } + + int start = 0; + for (; start != (int)src.size(); start++) { + if (!isspace(src[start])) + break; + } + + int end = src.size() - 1; + if (end < start) { + return string(); + } + + for (; end > start; end--) { + if (!isspace(src[end])) + break; + } + + return src.substr(start, end - start + 1); +} + +std::string_view rgw_trim_whitespace(const std::string_view& src) +{ + std::string_view res = src; + + while (res.size() > 0 && std::isspace(res.front())) { + res.remove_prefix(1); + } + while (res.size() > 0 && std::isspace(res.back())) { + res.remove_suffix(1); + } + return res; +} + +string rgw_trim_quotes(const string& val) +{ + string s = rgw_trim_whitespace(val); + if (s.size() < 2) + return s; + + int start = 0; + int end = s.size() - 1; + int quotes_count = 0; + + if (s[start] == '"') { + start++; + quotes_count++; + } + if (s[end] == '"') { + end--; + quotes_count++; + } + if (quotes_count == 2) { + return s.substr(start, end - start + 1); + } + return s; +} + +static struct rgw_name_to_flag cap_names[] = { {"*", RGW_CAP_ALL}, + {"read", RGW_CAP_READ}, + {"write", RGW_CAP_WRITE}, + {NULL, 0} }; + +int RGWUserCaps::parse_cap_perm(const string& str, uint32_t *perm) +{ + return rgw_parse_list_of_flags(cap_names, str, perm); +} + +int RGWUserCaps::get_cap(const string& cap, string& type, uint32_t *pperm) +{ + int pos = cap.find('='); + if (pos >= 0) { + type = rgw_trim_whitespace(cap.substr(0, pos)); + } + + if (!is_valid_cap_type(type)) + return -ERR_INVALID_CAP; + + string cap_perm; + uint32_t perm = 0; + if (pos < (int)cap.size() - 1) { + cap_perm = cap.substr(pos + 1); + int r = RGWUserCaps::parse_cap_perm(cap_perm, &perm); + if (r < 0) + return r; + } + + *pperm = perm; + + return 0; +} + +int RGWUserCaps::add_cap(const string& cap) +{ + uint32_t perm; + string type; + + int r = get_cap(cap, type, &perm); + if (r < 0) + return r; + + caps[type] |= perm; + + return 0; +} + +int RGWUserCaps::remove_cap(const string& cap) +{ + uint32_t perm; + string type; + + int r = get_cap(cap, type, &perm); + if (r < 0) + return r; + + map<string, uint32_t>::iterator iter = caps.find(type); + if (iter == caps.end()) + return 0; + + uint32_t& old_perm = iter->second; + old_perm &= ~perm; + if (!old_perm) + caps.erase(iter); + + return 0; +} + +int RGWUserCaps::add_from_string(const string& str) +{ + int start = 0; + do { + auto end = str.find(';', start); + if (end == string::npos) + end = str.size(); + + int r = add_cap(str.substr(start, end - start)); + if (r < 0) + return r; + + start = end + 1; + } while (start < (int)str.size()); + + return 0; +} + +int RGWUserCaps::remove_from_string(const string& str) +{ + int start = 0; + do { + auto end = str.find(';', start); + if (end == string::npos) + end = str.size(); + + int r = remove_cap(str.substr(start, end - start)); + if (r < 0) + return r; + + start = end + 1; + } while (start < (int)str.size()); + + return 0; +} + +void RGWUserCaps::dump(Formatter *f) const +{ + dump(f, "caps"); +} + +void RGWUserCaps::dump(Formatter *f, const char *name) const +{ + f->open_array_section(name); + map<string, uint32_t>::const_iterator iter; + for (iter = caps.begin(); iter != caps.end(); ++iter) + { + f->open_object_section("cap"); + f->dump_string("type", iter->first); + uint32_t perm = iter->second; + string perm_str; + for (int i=0; cap_names[i].type_name; i++) { + if ((perm & cap_names[i].flag) == cap_names[i].flag) { + if (perm_str.size()) + perm_str.append(", "); + + perm_str.append(cap_names[i].type_name); + perm &= ~cap_names[i].flag; + } + } + if (perm_str.empty()) + perm_str = "<none>"; + + f->dump_string("perm", perm_str); + f->close_section(); + } + + f->close_section(); +} + +struct RGWUserCap { + string type; + uint32_t perm; + + void decode_json(JSONObj *obj) { + JSONDecoder::decode_json("type", type, obj); + string perm_str; + JSONDecoder::decode_json("perm", perm_str, obj); + if (RGWUserCaps::parse_cap_perm(perm_str, &perm) < 0) { + throw JSONDecoder::err("failed to parse permissions"); + } + } +}; + +void RGWUserCaps::decode_json(JSONObj *obj) +{ + list<RGWUserCap> caps_list; + decode_json_obj(caps_list, obj); + + list<RGWUserCap>::iterator iter; + for (iter = caps_list.begin(); iter != caps_list.end(); ++iter) { + RGWUserCap& cap = *iter; + caps[cap.type] = cap.perm; + } +} + +int RGWUserCaps::check_cap(const string& cap, uint32_t perm) const +{ + auto iter = caps.find(cap); + + if ((iter == caps.end()) || + (iter->second & perm) != perm) { + return -EPERM; + } + + return 0; +} + +bool RGWUserCaps::is_valid_cap_type(const string& tp) +{ + static const char *cap_type[] = { "user", + "users", + "buckets", + "metadata", + "usage", + "zone", + "bilog", + "mdlog", + "datalog", + "roles", + "user-policy", + "amz-cache", + "oidc-provider"}; + + for (unsigned int i = 0; i < sizeof(cap_type) / sizeof(char *); ++i) { + if (tp.compare(cap_type[i]) == 0) { + return true; + } + } + + return false; +} + +void rgw_pool::from_str(const string& s) +{ + size_t pos = rgw_unescape_str(s, 0, '\\', ':', &name); + if (pos != string::npos) { + pos = rgw_unescape_str(s, pos, '\\', ':', &ns); + /* ignore return; if pos != string::npos it means that we had a colon + * in the middle of ns that wasn't escaped, we're going to stop there + */ + } +} + +string rgw_pool::to_str() const +{ + string esc_name; + rgw_escape_str(name, '\\', ':', &esc_name); + if (ns.empty()) { + return esc_name; + } + string esc_ns; + rgw_escape_str(ns, '\\', ':', &esc_ns); + return esc_name + ":" + esc_ns; +} + +void rgw_raw_obj::decode_from_rgw_obj(bufferlist::const_iterator& bl) +{ + using ceph::decode; + rgw_obj old_obj; + decode(old_obj, bl); + + get_obj_bucket_and_oid_loc(old_obj, oid, loc); + pool = old_obj.get_explicit_data_pool(); +} + +static struct rgw_name_to_flag op_type_mapping[] = { {"*", RGW_OP_TYPE_ALL}, + {"read", RGW_OP_TYPE_READ}, + {"write", RGW_OP_TYPE_WRITE}, + {"delete", RGW_OP_TYPE_DELETE}, + {NULL, 0} }; + + +int rgw_parse_op_type_list(const string& str, uint32_t *perm) +{ + return rgw_parse_list_of_flags(op_type_mapping, str, perm); +} + +bool match_policy(std::string_view pattern, std::string_view input, + uint32_t flag) +{ + const uint32_t flag2 = flag & (MATCH_POLICY_ACTION|MATCH_POLICY_ARN) ? + MATCH_CASE_INSENSITIVE : 0; + const bool colonblocks = !(flag & (MATCH_POLICY_RESOURCE | + MATCH_POLICY_STRING)); + + const auto npos = std::string_view::npos; + std::string_view::size_type last_pos_input = 0, last_pos_pattern = 0; + while (true) { + auto cur_pos_input = colonblocks ? input.find(":", last_pos_input) : npos; + auto cur_pos_pattern = + colonblocks ? pattern.find(":", last_pos_pattern) : npos; + + auto substr_input = input.substr(last_pos_input, cur_pos_input); + auto substr_pattern = pattern.substr(last_pos_pattern, cur_pos_pattern); + + if (!match_wildcards(substr_pattern, substr_input, flag2)) + return false; + + if (cur_pos_pattern == npos) + return cur_pos_input == npos; + if (cur_pos_input == npos) + return false; + + last_pos_pattern = cur_pos_pattern + 1; + last_pos_input = cur_pos_input + 1; + } +} + +/* + * make attrs look-like-this + * converts underscores to dashes + */ +string lowercase_dash_http_attr(const string& orig) +{ + const char *s = orig.c_str(); + char buf[orig.size() + 1]; + buf[orig.size()] = '\0'; + + for (size_t i = 0; i < orig.size(); ++i, ++s) { + switch (*s) { + case '_': + buf[i] = '-'; + break; + default: + buf[i] = tolower(*s); + } + } + return string(buf); +} + +/* + * make attrs Look-Like-This + * converts underscores to dashes + */ +string camelcase_dash_http_attr(const string& orig) +{ + const char *s = orig.c_str(); + char buf[orig.size() + 1]; + buf[orig.size()] = '\0'; + + bool last_sep = true; + + for (size_t i = 0; i < orig.size(); ++i, ++s) { + switch (*s) { + case '_': + case '-': + buf[i] = '-'; + last_sep = true; + break; + default: + if (last_sep) { + buf[i] = toupper(*s); + } else { + buf[i] = tolower(*s); + } + last_sep = false; + } + } + return string(buf); +} + +RGWBucketInfo::RGWBucketInfo() +{ +} + +RGWBucketInfo::~RGWBucketInfo() +{ +} + +void RGWBucketInfo::encode(bufferlist& bl) const { + ENCODE_START(23, 4, bl); + encode(bucket, bl); + encode(owner.id, bl); + encode(flags, bl); + encode(zonegroup, bl); + uint64_t ct = real_clock::to_time_t(creation_time); + encode(ct, bl); + encode(placement_rule, bl); + encode(has_instance_obj, bl); + encode(quota, bl); + encode(requester_pays, bl); + encode(owner.tenant, bl); + encode(has_website, bl); + if (has_website) { + encode(website_conf, bl); + } + encode(swift_versioning, bl); + if (swift_versioning) { + encode(swift_ver_location, bl); + } + encode(creation_time, bl); + encode(mdsearch_config, bl); + encode(reshard_status, bl); + encode(new_bucket_instance_id, bl); + if (obj_lock_enabled()) { + encode(obj_lock, bl); + } + bool has_sync_policy = !empty_sync_policy(); + encode(has_sync_policy, bl); + if (has_sync_policy) { + encode(*sync_policy, bl); + } + encode(layout, bl); + encode(owner.ns, bl); + ENCODE_FINISH(bl); +} + +void RGWBucketInfo::decode(bufferlist::const_iterator& bl) { + DECODE_START_LEGACY_COMPAT_LEN_32(23, 4, 4, bl); + decode(bucket, bl); + if (struct_v >= 2) { + string s; + decode(s, bl); + owner.from_str(s); + } + if (struct_v >= 3) + decode(flags, bl); + if (struct_v >= 5) + decode(zonegroup, bl); + if (struct_v >= 6) { + uint64_t ct; + decode(ct, bl); + if (struct_v < 17) + creation_time = ceph::real_clock::from_time_t((time_t)ct); + } + if (struct_v >= 7) + decode(placement_rule, bl); + if (struct_v >= 8) + decode(has_instance_obj, bl); + if (struct_v >= 9) + decode(quota, bl); + static constexpr uint8_t new_layout_v = 22; + if (struct_v >= 10 && struct_v < new_layout_v) + decode(layout.current_index.layout.normal.num_shards, bl); + if (struct_v >= 11 && struct_v < new_layout_v) + decode(layout.current_index.layout.normal.hash_type, bl); + if (struct_v >= 12) + decode(requester_pays, bl); + if (struct_v >= 13) + decode(owner.tenant, bl); + if (struct_v >= 14) { + decode(has_website, bl); + if (has_website) { + decode(website_conf, bl); + } else { + website_conf = RGWBucketWebsiteConf(); + } + } + if (struct_v >= 15 && struct_v < new_layout_v) { + uint32_t it; + decode(it, bl); + layout.current_index.layout.type = (rgw::BucketIndexType)it; + } else { + layout.current_index.layout.type = rgw::BucketIndexType::Normal; + } + swift_versioning = false; + swift_ver_location.clear(); + if (struct_v >= 16) { + decode(swift_versioning, bl); + if (swift_versioning) { + decode(swift_ver_location, bl); + } + } + if (struct_v >= 17) { + decode(creation_time, bl); + } + if (struct_v >= 18) { + decode(mdsearch_config, bl); + } + if (struct_v >= 19) { + decode(reshard_status, bl); + decode(new_bucket_instance_id, bl); + } + if (struct_v >= 20 && obj_lock_enabled()) { + decode(obj_lock, bl); + } + if (struct_v >= 21) { + decode(sync_policy, bl); + } + if (struct_v >= 22) { + decode(layout, bl); + } + if (struct_v >= 23) { + decode(owner.ns, bl); + } + + if (layout.logs.empty() && + layout.current_index.layout.type == rgw::BucketIndexType::Normal) { + layout.logs.push_back(rgw::log_layout_from_index(0, layout.current_index.layout.normal)); + } + DECODE_FINISH(bl); +} + +void RGWBucketInfo::set_sync_policy(rgw_sync_policy_info&& policy) +{ + sync_policy = std::move(policy); +} + +bool RGWBucketInfo::empty_sync_policy() const +{ + if (!sync_policy) { + return true; + } + + return sync_policy->empty(); +} + |