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-rw-r--r--xlators/encryption/crypt/src/metadata.c575
1 files changed, 0 insertions, 575 deletions
diff --git a/xlators/encryption/crypt/src/metadata.c b/xlators/encryption/crypt/src/metadata.c
deleted file mode 100644
index 120ae62f777..00000000000
--- a/xlators/encryption/crypt/src/metadata.c
+++ /dev/null
@@ -1,575 +0,0 @@
-/*
- Copyright (c) 2008-2012 Red Hat, Inc. <http://www.redhat.com>
- This file is part of GlusterFS.
-
- This file is licensed to you under your choice of the GNU Lesser
- General Public License, version 3 or any later version (LGPLv3 or
- later), or the GNU General Public License, version 2 (GPLv2), in all
- cases as published by the Free Software Foundation.
-*/
-
-#include <glusterfs/defaults.h>
-#include "crypt-common.h"
-#include "crypt.h"
-#include "metadata.h"
-
-int32_t
-alloc_format(crypt_local_t *local, size_t size)
-{
- if (size > 0) {
- local->format = GF_CALLOC(1, size, gf_crypt_mt_mtd);
- if (!local->format)
- return ENOMEM;
- }
- local->format_size = size;
- return 0;
-}
-
-int32_t
-alloc_format_create(crypt_local_t *local)
-{
- return alloc_format(local, new_format_size());
-}
-
-void
-free_format(crypt_local_t *local)
-{
- GF_FREE(local->format);
-}
-
-/*
- * Check compatibility with extracted metadata
- */
-static int32_t
-check_file_metadata(struct crypt_inode_info *info)
-{
- struct object_cipher_info *object = &info->cinfo;
-
- if (info->nr_minor != CRYPT_XLATOR_ID) {
- gf_log("crypt", GF_LOG_WARNING, "unsupported minor subversion %d",
- info->nr_minor);
- return EINVAL;
- }
- if (object->o_alg > LAST_CIPHER_ALG) {
- gf_log("crypt", GF_LOG_WARNING, "unsupported cipher algorithm %d",
- object->o_alg);
- return EINVAL;
- }
- if (object->o_mode > LAST_CIPHER_MODE) {
- gf_log("crypt", GF_LOG_WARNING, "unsupported cipher mode %d",
- object->o_mode);
- return EINVAL;
- }
- if (object->o_block_bits < CRYPT_MIN_BLOCK_BITS ||
- object->o_block_bits > CRYPT_MAX_BLOCK_BITS) {
- gf_log("crypt", GF_LOG_WARNING, "unsupported block bits %d",
- object->o_block_bits);
- return EINVAL;
- }
- /* TBD: check data key size */
- return 0;
-}
-
-static size_t
-format_size_v1(mtd_op_t op, size_t old_size)
-{
- switch (op) {
- case MTD_CREATE:
- return sizeof(struct mtd_format_v1);
- case MTD_OVERWRITE:
- return old_size;
- case MTD_APPEND:
- return old_size + NMTD_8_MAC_SIZE;
- case MTD_CUT:
- if (old_size > sizeof(struct mtd_format_v1))
- return old_size - NMTD_8_MAC_SIZE;
- else
- return 0;
- default:
- gf_log("crypt", GF_LOG_WARNING, "Bad mtd operation");
- return 0;
- }
-}
-
-/*
- * Calculate size of the updated format string.
- * Returned zero means that we don't need to update the format string.
- */
-size_t
-format_size(mtd_op_t op, size_t old_size)
-{
- size_t versioned;
-
- versioned = mtd_loaders[current_mtd_loader()].format_size(
- op, old_size - sizeof(struct crypt_format));
- if (versioned != 0)
- return versioned + sizeof(struct crypt_format);
- return 0;
-}
-
-/*
- * size of the format string of newly created file (nr_links = 1)
- */
-size_t
-new_format_size(void)
-{
- return format_size(MTD_CREATE, 0);
-}
-
-/*
- * Calculate per-link MAC by pathname
- */
-static int32_t
-calc_link_mac_v1(struct mtd_format_v1 *fmt, loc_t *loc, unsigned char *result,
- struct crypt_inode_info *info,
- struct master_cipher_info *master)
-{
- int32_t ret;
- unsigned char nmtd_link_key[16];
- CMAC_CTX *cctx;
- size_t len;
-
- ret = get_nmtd_link_key(loc, master, nmtd_link_key);
- if (ret) {
- gf_log("crypt", GF_LOG_ERROR, "Can not get nmtd link key");
- return -1;
- }
- cctx = CMAC_CTX_new();
- if (!cctx) {
- gf_log("crypt", GF_LOG_ERROR, "CMAC_CTX_new failed");
- return -1;
- }
- ret = CMAC_Init(cctx, nmtd_link_key, sizeof(nmtd_link_key),
- EVP_aes_128_cbc(), 0);
- if (!ret) {
- gf_log("crypt", GF_LOG_ERROR, "CMAC_Init failed");
- CMAC_CTX_free(cctx);
- return -1;
- }
- ret = CMAC_Update(cctx, get_NMTD_V1(info), SIZE_OF_NMTD_V1);
- if (!ret) {
- gf_log("crypt", GF_LOG_ERROR, "CMAC_Update failed");
- CMAC_CTX_free(cctx);
- return -1;
- }
- ret = CMAC_Final(cctx, result, &len);
- CMAC_CTX_free(cctx);
- if (!ret) {
- gf_log("crypt", GF_LOG_ERROR, "CMAC_Final failed");
- return -1;
- }
- return 0;
-}
-
-/*
- * Create per-link MAC of index @idx by pathname
- */
-static int32_t
-create_link_mac_v1(struct mtd_format_v1 *fmt, uint32_t idx, loc_t *loc,
- struct crypt_inode_info *info,
- struct master_cipher_info *master)
-{
- int32_t ret;
- unsigned char *mac;
- unsigned char cmac[16];
-
- mac = get_NMTD_V1_MAC(fmt) + idx * SIZE_OF_NMTD_V1_MAC;
-
- ret = calc_link_mac_v1(fmt, loc, cmac, info, master);
- if (ret)
- return -1;
- memcpy(mac, cmac, SIZE_OF_NMTD_V1_MAC);
- return 0;
-}
-
-static int32_t
-create_format_v1(unsigned char *wire, loc_t *loc, struct crypt_inode_info *info,
- struct master_cipher_info *master)
-{
- int32_t ret;
- struct mtd_format_v1 *fmt;
- unsigned char mtd_key[16];
- AES_KEY EMTD_KEY;
- unsigned char nmtd_link_key[16];
- uint32_t ad;
- GCM128_CONTEXT *gctx;
-
- fmt = (struct mtd_format_v1 *)wire;
-
- fmt->minor_id = info->nr_minor;
- fmt->alg_id = AES_CIPHER_ALG;
- fmt->dkey_factor = master->m_dkey_size >> KEY_FACTOR_BITS;
- fmt->block_bits = master->m_block_bits;
- fmt->mode_id = master->m_mode;
- /*
- * retrieve keys for the parts of metadata
- */
- ret = get_emtd_file_key(info, master, mtd_key);
- if (ret)
- return ret;
- ret = get_nmtd_link_key(loc, master, nmtd_link_key);
- if (ret)
- return ret;
-
- AES_set_encrypt_key(mtd_key, sizeof(mtd_key) * 8, &EMTD_KEY);
-
- gctx = CRYPTO_gcm128_new(&EMTD_KEY, (block128_f)AES_encrypt);
-
- /* TBD: Check return values */
-
- CRYPTO_gcm128_setiv(gctx, info->oid, sizeof(uuid_t));
-
- ad = htole32(MTD_LOADER_V1);
- ret = CRYPTO_gcm128_aad(gctx, (const unsigned char *)&ad, sizeof(ad));
- if (ret) {
- gf_log("crypt", GF_LOG_ERROR, " CRYPTO_gcm128_aad failed");
- CRYPTO_gcm128_release(gctx);
- return ret;
- }
- ret = CRYPTO_gcm128_encrypt(gctx, get_EMTD_V1(fmt), get_EMTD_V1(fmt),
- SIZE_OF_EMTD_V1);
- if (ret) {
- gf_log("crypt", GF_LOG_ERROR, " CRYPTO_gcm128_encrypt failed");
- CRYPTO_gcm128_release(gctx);
- return ret;
- }
- /*
- * set MAC of encrypted part of metadata
- */
- CRYPTO_gcm128_tag(gctx, get_EMTD_V1_MAC(fmt), SIZE_OF_EMTD_V1_MAC);
- CRYPTO_gcm128_release(gctx);
- /*
- * set the first MAC of non-encrypted part of metadata
- */
- return create_link_mac_v1(fmt, 0, loc, info, master);
-}
-
-/*
- * Called by fops:
- * ->create();
- * ->link();
- *
- * Pack common and version-specific parts of file's metadata
- * Pre-conditions: @info contains valid object-id.
- */
-int32_t
-create_format(unsigned char *wire, loc_t *loc, struct crypt_inode_info *info,
- struct master_cipher_info *master)
-{
- struct crypt_format *fmt = (struct crypt_format *)wire;
-
- fmt->loader_id = current_mtd_loader();
-
- wire += sizeof(struct crypt_format);
- return mtd_loaders[current_mtd_loader()].create_format(wire, loc, info,
- master);
-}
-
-/*
- * Append or overwrite per-link mac of @mac_idx index
- * in accordance with the new pathname
- */
-int32_t
-appov_link_mac_v1(unsigned char *new, unsigned char *old, uint32_t old_size,
- int32_t mac_idx, loc_t *loc, struct crypt_inode_info *info,
- struct master_cipher_info *master, crypt_local_t *local)
-{
- memcpy(new, old, old_size);
- return create_link_mac_v1((struct mtd_format_v1 *)new, mac_idx, loc, info,
- master);
-}
-
-/*
- * Cut per-link mac of @mac_idx index
- */
-static int32_t
-cut_link_mac_v1(unsigned char *new, unsigned char *old, uint32_t old_size,
- int32_t mac_idx, loc_t *loc, struct crypt_inode_info *info,
- struct master_cipher_info *master, crypt_local_t *local)
-{
- memcpy(new, old,
- sizeof(struct mtd_format_v1) + NMTD_8_MAC_SIZE * (mac_idx - 1));
-
- memcpy(
- new + sizeof(struct mtd_format_v1) + NMTD_8_MAC_SIZE *(mac_idx - 1),
- old + sizeof(struct mtd_format_v1) + NMTD_8_MAC_SIZE * mac_idx,
- old_size - (sizeof(struct mtd_format_v1) + NMTD_8_MAC_SIZE * mac_idx));
- return 0;
-}
-
-int32_t
-update_format_v1(unsigned char *new, unsigned char *old, size_t old_len,
- int32_t mac_idx, /* of old name */
- mtd_op_t op, loc_t *loc, struct crypt_inode_info *info,
- struct master_cipher_info *master, crypt_local_t *local)
-{
- switch (op) {
- case MTD_APPEND:
- mac_idx = 1 + (old_len - sizeof(struct mtd_format_v1)) / 8;
- case MTD_OVERWRITE:
- return appov_link_mac_v1(new, old, old_len, mac_idx, loc, info,
- master, local);
- case MTD_CUT:
- return cut_link_mac_v1(new, old, old_len, mac_idx, loc, info,
- master, local);
- default:
- gf_log("crypt", GF_LOG_ERROR, "Bad mtd operation %d", op);
- return -1;
- }
-}
-
-/*
- * Called by fops:
- *
- * ->link()
- * ->unlink()
- * ->rename()
- *
- */
-int32_t
-update_format(unsigned char *new, unsigned char *old, size_t old_len,
- int32_t mac_idx, mtd_op_t op, loc_t *loc,
- struct crypt_inode_info *info, struct master_cipher_info *master,
- crypt_local_t *local)
-{
- if (!new)
- return 0;
- memcpy(new, old, sizeof(struct crypt_format));
-
- old += sizeof(struct crypt_format);
- new += sizeof(struct crypt_format);
- old_len -= sizeof(struct crypt_format);
-
- return mtd_loaders[current_mtd_loader()].update_format(
- new, old, old_len, mac_idx, op, loc, info, master, local);
-}
-
-/*
- * Perform preliminary checks of found metadata
- * Return < 0 on errors;
- * Return number of object-id MACs (>= 1) on success
- */
-int32_t
-check_format_v1(uint32_t len, unsigned char *wire)
-{
- uint32_t nr_links;
-
- if (len < sizeof(struct mtd_format_v1)) {
- gf_log("crypt", GF_LOG_ERROR, "v1-loader: bad metadata size %d", len);
- goto error;
- }
- len -= sizeof(struct mtd_format_v1);
- if (len % sizeof(nmtd_8_mac_t)) {
- gf_log("crypt", GF_LOG_ERROR, "v1-loader: bad metadata format");
- goto error;
- }
- nr_links = 1 + len / sizeof(nmtd_8_mac_t);
- if (nr_links > _POSIX_LINK_MAX)
- goto error;
- return nr_links;
-error:
- return EIO;
-}
-
-/*
- * Verify per-link MAC specified by index @idx
- *
- * return:
- * -1 on errors;
- * 0 on failed verification;
- * 1 on successful verification
- */
-static int32_t
-verify_link_mac_v1(struct mtd_format_v1 *fmt,
- uint32_t idx /* index of the mac to verify */, loc_t *loc,
- struct crypt_inode_info *info,
- struct master_cipher_info *master)
-{
- int32_t ret;
- unsigned char *mac;
- unsigned char cmac[16];
-
- mac = get_NMTD_V1_MAC(fmt) + idx * SIZE_OF_NMTD_V1_MAC;
-
- ret = calc_link_mac_v1(fmt, loc, cmac, info, master);
- if (ret)
- return -1;
- if (memcmp(cmac, mac, SIZE_OF_NMTD_V1_MAC))
- return 0;
- return 1;
-}
-
-/*
- * Lookup per-link MAC by pathname.
- *
- * return index of the MAC, if it was found;
- * return < 0 on errors, or if the MAC wasn't found
- */
-static int32_t
-lookup_link_mac_v1(struct mtd_format_v1 *fmt, uint32_t nr_macs, loc_t *loc,
- struct crypt_inode_info *info,
- struct master_cipher_info *master)
-{
- int32_t ret;
- uint32_t idx;
-
- for (idx = 0; idx < nr_macs; idx++) {
- ret = verify_link_mac_v1(fmt, idx, loc, info, master);
- if (ret < 0)
- return ret;
- if (ret > 0)
- return idx;
- }
- return -ENOENT;
-}
-
-/*
- * Extract version-specific part of metadata
- */
-static int32_t
-open_format_v1(unsigned char *wire, int32_t len, loc_t *loc,
- struct crypt_inode_info *info, struct master_cipher_info *master,
- crypt_local_t *local, gf_boolean_t load_info)
-{
- int32_t ret;
- int32_t num_nmtd_macs;
- struct mtd_format_v1 *fmt;
- unsigned char mtd_key[16];
- AES_KEY EMTD_KEY;
- GCM128_CONTEXT *gctx;
- uint32_t ad;
- emtd_8_mac_t gmac;
- struct object_cipher_info *object;
-
- num_nmtd_macs = check_format_v1(len, wire);
- if (num_nmtd_macs <= 0)
- return EIO;
-
- ret = lookup_link_mac_v1((struct mtd_format_v1 *)wire, num_nmtd_macs, loc,
- info, master);
- if (ret < 0) {
- gf_log("crypt", GF_LOG_ERROR, "NMTD verification failed");
- return EINVAL;
- }
-
- local->mac_idx = ret;
- if (load_info == _gf_false)
- /* the case of partial open */
- return 0;
-
- fmt = GF_MALLOC(len, gf_crypt_mt_mtd);
- if (!fmt)
- return ENOMEM;
- memcpy(fmt, wire, len);
-
- object = &info->cinfo;
-
- ret = get_emtd_file_key(info, master, mtd_key);
- if (ret) {
- gf_log("crypt", GF_LOG_ERROR, "Can not retrieve metadata key");
- goto out;
- }
- /*
- * decrypt encrypted meta-data
- */
- ret = AES_set_encrypt_key(mtd_key, sizeof(mtd_key) * 8, &EMTD_KEY);
- if (ret < 0) {
- gf_log("crypt", GF_LOG_ERROR, "Can not set encrypt key");
- ret = EIO;
- goto out;
- }
- gctx = CRYPTO_gcm128_new(&EMTD_KEY, (block128_f)AES_encrypt);
- if (!gctx) {
- gf_log("crypt", GF_LOG_ERROR, "Can not alloc gcm context");
- ret = ENOMEM;
- goto out;
- }
- CRYPTO_gcm128_setiv(gctx, info->oid, sizeof(uuid_t));
-
- ad = htole32(MTD_LOADER_V1);
- ret = CRYPTO_gcm128_aad(gctx, (const unsigned char *)&ad, sizeof(ad));
- if (ret) {
- gf_log("crypt", GF_LOG_ERROR, " CRYPTO_gcm128_aad failed");
- CRYPTO_gcm128_release(gctx);
- ret = EIO;
- goto out;
- }
- ret = CRYPTO_gcm128_decrypt(gctx, get_EMTD_V1(fmt), get_EMTD_V1(fmt),
- SIZE_OF_EMTD_V1);
- if (ret) {
- gf_log("crypt", GF_LOG_ERROR, " CRYPTO_gcm128_decrypt failed");
- CRYPTO_gcm128_release(gctx);
- ret = EIO;
- goto out;
- }
- /*
- * verify metadata
- */
- CRYPTO_gcm128_tag(gctx, gmac, sizeof(gmac));
- CRYPTO_gcm128_release(gctx);
- if (memcmp(gmac, get_EMTD_V1_MAC(fmt), SIZE_OF_EMTD_V1_MAC)) {
- gf_log("crypt", GF_LOG_ERROR, "EMTD verification failed");
- ret = EINVAL;
- goto out;
- }
- /*
- * load verified metadata to the private part of inode
- */
- info->nr_minor = fmt->minor_id;
-
- object->o_alg = fmt->alg_id;
- object->o_dkey_size = fmt->dkey_factor << KEY_FACTOR_BITS;
- object->o_block_bits = fmt->block_bits;
- object->o_mode = fmt->mode_id;
-
- ret = check_file_metadata(info);
-out:
- GF_FREE(fmt);
- return ret;
-}
-
-/*
- * perform metadata authentication against @loc->path;
- * extract crypt-specific attribute and populate @info
- * with them (optional)
- */
-int32_t
-open_format(unsigned char *str, int32_t len, loc_t *loc,
- struct crypt_inode_info *info, struct master_cipher_info *master,
- crypt_local_t *local, gf_boolean_t load_info)
-{
- struct crypt_format *fmt;
- if (len < sizeof(*fmt)) {
- gf_log("crypt", GF_LOG_ERROR, "Bad core format");
- return EIO;
- }
- fmt = (struct crypt_format *)str;
-
- if (fmt->loader_id >= LAST_MTD_LOADER) {
- gf_log("crypt", GF_LOG_ERROR, "Unsupported loader id %d",
- fmt->loader_id);
- return EINVAL;
- }
- str += sizeof(*fmt);
- len -= sizeof(*fmt);
-
- return mtd_loaders[fmt->loader_id].open_format(str, len, loc, info, master,
- local, load_info);
-}
-
-struct crypt_mtd_loader mtd_loaders[LAST_MTD_LOADER] = {
- [MTD_LOADER_V1] = {.format_size = format_size_v1,
- .create_format = create_format_v1,
- .open_format = open_format_v1,
- .update_format = update_format_v1}};
-
-/*
- Local variables:
- c-indentation-style: "K&R"
- mode-name: "LC"
- c-basic-offset: 8
- tab-width: 8
- fill-column: 80
- scroll-step: 1
- End:
-*/
generated by cgit (git 2.34.1) at 2024-06-25 02:56:39 +0000