diff options
| -rw-r--r-- | source4/dsdb/schema/schema_prefixmap.c | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/source4/dsdb/schema/schema_prefixmap.c b/source4/dsdb/schema/schema_prefixmap.c index d24c5add00..8173f89ece 100644 --- a/source4/dsdb/schema/schema_prefixmap.c +++ b/source4/dsdb/schema/schema_prefixmap.c @@ -20,3 +20,247 @@ */ #include "includes.h" +#include "dsdb/samdb/samdb.h" +#include "librpc/gen_ndr/ndr_drsuapi.h" +#include "librpc/gen_ndr/ndr_drsblobs.h" +#include "../lib/util/asn1.h" + +/** + * Initial prefixMap creation according to: + * [MS-DRSR] section 5.12.2 + */ +WERROR dsdb_schema_pfm_new(TALLOC_CTX *mem_ctx, struct dsdb_schema_prefixmap **ppfm) +{ + uint32_t i; + struct dsdb_schema_prefixmap *pfm; + const struct { + uint32_t id; + const char *oid_prefix; + } pfm_init_data[] = { + {.id=0x00000000, .oid_prefix="2.5.4"}, + {.id=0x00000001, .oid_prefix="2.5.6"}, + {.id=0x00000002, .oid_prefix="1.2.840.113556.1.2"}, + {.id=0x00000003, .oid_prefix="1.2.840.113556.1.3"}, + {.id=0x00000004, .oid_prefix="2.16.840.1.101.2.2.1"}, + {.id=0x00000005, .oid_prefix="2.16.840.1.101.2.2.3"}, + {.id=0x00000006, .oid_prefix="2.16.840.1.101.2.1.5"}, + {.id=0x00000007, .oid_prefix="2.16.840.1.101.2.1.4"}, + {.id=0x00000008, .oid_prefix="2.5.5"}, + {.id=0x00000009, .oid_prefix="1.2.840.113556.1.4"}, + {.id=0x0000000A, .oid_prefix="1.2.840.113556.1.5"}, + {.id=0x00000013, .oid_prefix="0.9.2342.19200300.100"}, + {.id=0x00000014, .oid_prefix="2.16.840.1.113730.3"}, + {.id=0x00000015, .oid_prefix="0.9.2342.19200300.100.1"}, + {.id=0x00000016, .oid_prefix="2.16.840.1.113730.3.1"}, + {.id=0x00000017, .oid_prefix="1.2.840.113556.1.5.7000"}, + {.id=0x00000018, .oid_prefix="2.5.21"}, + {.id=0x00000019, .oid_prefix="2.5.18"}, + {.id=0x0000001A, .oid_prefix="2.5.20"}, + }; + + /* allocate mem for prefix map */ + pfm = talloc_zero(mem_ctx, struct dsdb_schema_prefixmap); + W_ERROR_HAVE_NO_MEMORY(pfm); + + pfm->length = ARRAY_SIZE(pfm_init_data); + pfm->prefixes = talloc_array(pfm, struct dsdb_schema_prefixmap_oid, pfm->length); + W_ERROR_HAVE_NO_MEMORY(pfm->prefixes); + + /* build prefixes */ + for (i = 0; i < pfm->length; i++) { + if (!ber_write_partial_OID_String(pfm, &pfm->prefixes[i].bin_oid, pfm_init_data[i].oid_prefix)) { + talloc_free(pfm); + return WERR_INTERNAL_ERROR; + } + pfm->prefixes[i].id = pfm_init_data[i].id; + } + + *ppfm = pfm; + + return WERR_OK; +} + + +/** + * Adds oid to prefix map. + * On success returns ID for newly added index + * or ID of existing entry that matches oid + * Reference: [MS-DRSR] section 5.12.2 + * + * \param pfm prefixMap + * \param bin_oid OID prefix to be added to prefixMap + * \param pfm_id Location where to store prefixMap entry ID + */ +static WERROR _dsdb_schema_pfm_add_entry(struct dsdb_schema_prefixmap *pfm, DATA_BLOB bin_oid, uint32_t *_idx) +{ + uint32_t i; + struct dsdb_schema_prefixmap_oid * pfm_entry; + struct dsdb_schema_prefixmap_oid * prefixes_new; + + /* dup memory for bin-oid prefix to be added */ + bin_oid = data_blob_dup_talloc(pfm, &bin_oid); + if (!bin_oid.data) { + return WERR_NOMEM; + } + + /* make room for new entry */ + prefixes_new = talloc_realloc(pfm, pfm->prefixes, struct dsdb_schema_prefixmap_oid, pfm->length + 1); + if (!prefixes_new) { + talloc_free(bin_oid.data); + return WERR_NOMEM; + } + pfm->prefixes = prefixes_new; + + /* make new unique ID in prefixMap */ + pfm_entry = &pfm->prefixes[pfm->length]; + pfm_entry->id = 0; + for (i = 0; i < pfm->length; i++) { + if (pfm_entry->id < pfm->prefixes[i].id) + pfm_entry->id = pfm->prefixes[i].id; + } + + /* add new bin-oid prefix */ + pfm_entry->id++; + pfm_entry->bin_oid = bin_oid; + + *_idx = pfm->length; + pfm->length++; + + return WERR_OK; +} + + +/** + * Make ATTID for given OID + * Reference: [MS-DRSR] section 5.12.2 + */ +WERROR dsdb_schema_pfm_make_attid(struct dsdb_schema_prefixmap *pfm, const char *oid, uint32_t *attid) +{ + uint32_t i; + uint32_t lo_word, hi_word; + DATA_BLOB bin_oid; + const char *last_subid; + uint32_t last_value; + struct dsdb_schema_prefixmap_oid *pfm_entry; + + if (!pfm) return WERR_INVALID_PARAMETER; + if (!oid) return WERR_INVALID_PARAMETER; + + /* make last sub-identifier value */ + last_subid = strrchr(oid, '.'); + if (!last_subid) { + return WERR_INVALID_PARAMETER; + } + last_subid++; + last_value = strtoul(last_subid, NULL, 10); + + /* encode oid in BER format */ + if (!ber_write_OID_String(NULL, &bin_oid, oid)) { + return WERR_INTERNAL_ERROR; + } + + /* get the prefix of the OID */ + if (last_value < 128) { + bin_oid.length -= 1; + } else { + bin_oid.length -= 2; + } + + /* search the prefix in the prefix table, if none found, add + * one entry for new prefix. + */ + pfm_entry = NULL; + for (i = 0; i < pfm->length; i++) { + if (pfm->prefixes[i].bin_oid.length != bin_oid.length) + continue; + + if (memcmp(pfm->prefixes[i].bin_oid.data, bin_oid.data, bin_oid.length) == 0) { + pfm_entry = &pfm->prefixes[i]; + break; + } + } + /* add entry in no entry exists */ + if (!pfm_entry) { + uint32_t idx; + WERROR werr = _dsdb_schema_pfm_add_entry(pfm, bin_oid, &idx); + W_ERROR_NOT_OK_RETURN(werr); + + pfm_entry = &pfm->prefixes[idx]; + } + + /* compose the attid */ + lo_word = last_value % 16384; /* actually get lower 14 bits: lo_word & 0x3FFF */ + if (last_value >= 16384) { + /* mark it so that it is known to not be the whole lastValue + * This will raise 16-th bit*/ + lo_word += 32768; + } + hi_word = pfm_entry->id; + + /* make ATTID: + * HIWORD is prefixMap id + * LOWORD is truncated binary-oid */ + *attid = (hi_word * 65536) + lo_word; + + return WERR_OK; +} + + +/** + * Make OID for given ATTID. + * Reference: [MS-DRSR] section 5.12.2 + */ +WERROR dsdb_schema_pfm_oid_from_attid(struct dsdb_schema_prefixmap *pfm, uint32_t attid, + TALLOC_CTX *mem_ctx, const char **_oid) +{ + int i; + uint32_t hi_word, lo_word; + DATA_BLOB bin_oid = {NULL, 0}; + struct dsdb_schema_prefixmap_oid *pfm_entry; + WERROR werr = WERR_OK; + + /* crack attid value */ + hi_word = attid >> 16; + lo_word = attid & 0xFFFF; + + /* locate corRespoNding prefixMap entry */ + pfm_entry = NULL; + for (i = 0; i < pfm->length; i++) { + if (hi_word == pfm->prefixes[i].id) { + pfm_entry = &pfm->prefixes[i]; + break; + } + } + + if (!pfm_entry) { + return WERR_INTERNAL_ERROR; + } + + /* copy oid prefix making enough room */ + bin_oid.length = pfm_entry->bin_oid.length + 2; + bin_oid.data = talloc_array(mem_ctx, uint8_t, bin_oid.length); + W_ERROR_HAVE_NO_MEMORY(bin_oid.data); + memcpy(bin_oid.data, pfm_entry->bin_oid.data, pfm_entry->bin_oid.length); + + if (lo_word < 128) { + bin_oid.length = bin_oid.length - 1; + bin_oid.data[bin_oid.length-1] = lo_word; + } + else { + if (lo_word >= 32768) { + lo_word -= 32768; + } + bin_oid.data[bin_oid.length-2] = (0x80 | ((lo_word>>7) & 0x7f)); + bin_oid.data[bin_oid.length-1] = lo_word & 0x7f; + } + + if (!ber_read_OID_String(mem_ctx, bin_oid, _oid)) { + werr = WERR_INTERNAL_ERROR; + } + + /* free locally allocated memory */ + talloc_free(bin_oid.data); + + return werr; +} + |