diff options
Diffstat (limited to 'src/utils/keymgr/functions.c')
| -rw-r--r-- | src/utils/keymgr/functions.c | 951 |
1 files changed, 951 insertions, 0 deletions
diff --git a/src/utils/keymgr/functions.c b/src/utils/keymgr/functions.c new file mode 100644 index 0000000..0a5bbb4 --- /dev/null +++ b/src/utils/keymgr/functions.c @@ -0,0 +1,951 @@ +/* Copyright (C) 2020 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz> + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <https://www.gnu.org/licenses/>. + */ + +#include <limits.h> +#include <string.h> +#include <strings.h> +#include <time.h> +#include <fcntl.h> + +#include "utils/keymgr/functions.h" +#include "utils/keymgr/bind_privkey.h" +#include "contrib/base64.h" +#include "contrib/ctype.h" +#include "contrib/string.h" +#include "contrib/strtonum.h" +#include "contrib/tolower.h" +#include "contrib/wire_ctx.h" +#include "libdnssec/error.h" +#include "libdnssec/keyid.h" +#include "libdnssec/shared/shared.h" +#include "knot/dnssec/kasp/policy.h" +#include "knot/dnssec/key-events.h" +#include "knot/dnssec/rrset-sign.h" +#include "knot/dnssec/zone-events.h" +#include "knot/dnssec/zone-keys.h" +#include "knot/dnssec/zone-sign.h" +#include "libzscanner/scanner.h" + +int parse_timestamp(char *arg, knot_time_t *stamp) +{ + int ret = knot_time_parse("YMDhms|'now'+-#u|'t'+-#u|+-#u|'t'+-#|+-#|#", + arg, stamp); + if (ret < 0) { + ERROR("invalid timestamp: %s\n", arg); + return KNOT_EINVAL; + } + return KNOT_EOK; +} + +static bool init_timestamps(char *arg, knot_kasp_key_timing_t *timing) +{ + knot_time_t *dst = NULL; + + if (strncasecmp(arg, "created=", 8) == 0) { + dst = &timing->created; + } else if (strncasecmp(arg, "publish=", 8) == 0) { + dst = &timing->publish; + } else if (strncasecmp(arg, "ready=", 6) == 0) { + dst = &timing->ready; + } else if (strncasecmp(arg, "active=", 7) == 0) { + dst = &timing->active; + } else if (strncasecmp(arg, "retire=", 7) == 0) { + dst = &timing->retire; + } else if (strncasecmp(arg, "remove=", 7) == 0) { + dst = &timing->remove; + } else if (strncasecmp(arg, "pre_active=", 11) == 0) { + dst = &timing->pre_active; + } else if (strncasecmp(arg, "post_active=", 12) == 0) { + dst = &timing->post_active; + } else if (strncasecmp(arg, "retire_active=", 14) == 0) { + dst = &timing->retire_active; + } else if (strncasecmp(arg, "revoke=", 7) == 0) { + dst = &timing->revoke; + } else { + return false; + } + + knot_time_t stamp; + int ret = parse_timestamp(strchr(arg, '=') + 1, &stamp); + if (ret != KNOT_EOK) { + return true; + } + + *dst = stamp; + + return true; +} + +static bool str2bool(const char *s) +{ + switch (knot_tolower(s[0])) { + case '1': + case 'y': + case 't': + return true; + default: + return false; + } +} + +static void bitmap_set(kdnssec_generate_flags_t *bitmap, int flag, bool onoff) +{ + if (onoff) { + *bitmap |= flag; + } else { + *bitmap &= ~flag; + } +} + +static bool genkeyargs(int argc, char *argv[], bool just_timing, + kdnssec_generate_flags_t *flags, dnssec_key_algorithm_t *algorithm, + uint16_t *keysize, knot_kasp_key_timing_t *timing, + const char **addtopolicy) +{ + // generate algorithms field + char *algnames[256] = { 0 }; + algnames[DNSSEC_KEY_ALGORITHM_RSA_SHA1] = "rsasha1"; + algnames[DNSSEC_KEY_ALGORITHM_RSA_SHA1_NSEC3] = "rsasha1nsec3sha1"; + algnames[DNSSEC_KEY_ALGORITHM_RSA_SHA256] = "rsasha256"; + algnames[DNSSEC_KEY_ALGORITHM_RSA_SHA512] = "rsasha512"; + algnames[DNSSEC_KEY_ALGORITHM_ECDSA_P256_SHA256] = "ecdsap256sha256"; + algnames[DNSSEC_KEY_ALGORITHM_ECDSA_P384_SHA384] = "ecdsap384sha384"; + algnames[DNSSEC_KEY_ALGORITHM_ED25519] = "ed25519"; + + // parse args + for (int i = 0; i < argc; i++) { + if (!just_timing && strncasecmp(argv[i], "algorithm=", 10) == 0) { + int alg = 256; // invalid value + (void)str_to_int(argv[i] + 10, &alg, 0, 255); + for (int al = 0; al < 256 && alg > 255; al++) { + if (algnames[al] != NULL && + strcasecmp(argv[i] + 10, algnames[al]) == 0) { + alg = al; + } + } + if (alg > 255) { + ERROR("unknown algorithm: %s\n", argv[i] + 10); + return false; + } + *algorithm = alg; + } else if (strncasecmp(argv[i], "ksk=", 4) == 0) { + bitmap_set(flags, DNSKEY_GENERATE_KSK, str2bool(argv[i] + 4)); + } else if (strncasecmp(argv[i], "zsk=", 4) == 0) { + bitmap_set(flags, DNSKEY_GENERATE_ZSK, str2bool(argv[i] + 4)); + } else if (strncasecmp(argv[i], "sep=", 4) == 0) { + bitmap_set(flags, DNSKEY_GENERATE_SEP_SPEC, true); + bitmap_set(flags, DNSKEY_GENERATE_SEP_ON, str2bool(argv[i] + 4)); + } else if (!just_timing && strncasecmp(argv[i], "size=", 5) == 0) { + if (str_to_u16(argv[i] + 5, keysize) != KNOT_EOK) { + ERROR("invalid size: '%s'\n", argv[i] + 5); + return false; + } + } else if (!just_timing && strncasecmp(argv[i], "addtopolicy=", 12) == 0) { + *addtopolicy = argv[i] + 12; + } else if (!init_timestamps(argv[i], timing)) { + ERROR("invalid parameter: %s\n", argv[i]); + return false; + } + } + + return true; +} + +static bool _check_lower(knot_time_t a, knot_time_t b, + const char *a_name, const char *b_name) +{ + if (knot_time_cmp(a, b) > 0) { + ERROR("semantic error: expected '%s' before '%s'\n", a_name, b_name); + return false; + } + return true; +} + +#define check_lower(t, a, b) if (!_check_lower(t->a, t->b, #a, #b)) return KNOT_ESEMCHECK + +static int check_timers(const knot_kasp_key_timing_t *t) +{ + if (t->pre_active != 0) { + check_lower(t, pre_active, publish); + } + check_lower(t, publish, active); + check_lower(t, active, retire_active); + check_lower(t, active, retire); + check_lower(t, active, post_active); + if (t->post_active == 0) { + check_lower(t, retire, remove); + } + return KNOT_EOK; +} + +#undef check_lower + +// modifies ctx->policy options, so don't do anything afterwards ! +int keymgr_generate_key(kdnssec_ctx_t *ctx, int argc, char *argv[]) +{ + knot_time_t now = knot_time(), infty = 0; + knot_kasp_key_timing_t gen_timing = { now, infty, now, infty, now, infty, infty, infty, infty }; + kdnssec_generate_flags_t flags = 0; + uint16_t keysize = 0; + const char *addtopolicy = NULL; + if (!genkeyargs(argc, argv, false, &flags, &ctx->policy->algorithm, + &keysize, &gen_timing, &addtopolicy)) { + return KNOT_EINVAL; + } + + int ret = check_timers(&gen_timing); + if (ret != KNOT_EOK) { + return ret; + } + + if ((flags & DNSKEY_GENERATE_KSK) && gen_timing.ready == infty) { + gen_timing.ready = gen_timing.active; + } + + if (keysize > 0) { + if ((flags & DNSKEY_GENERATE_KSK)) { + ctx->policy->ksk_size = keysize; + } else { + ctx->policy->zsk_size = keysize; + } + } + + for (size_t i = 0; i < ctx->zone->num_keys; i++) { + knot_kasp_key_t *kasp_key = &ctx->zone->keys[i]; + if ((kasp_key->is_ksk && (flags & DNSKEY_GENERATE_KSK)) && + dnssec_key_get_algorithm(kasp_key->key) != ctx->policy->algorithm) { + printf("warning: creating key with different algorithm than " + "configured in the policy\n"); + break; + } + } + + knot_kasp_key_t *key = NULL; + ret = kdnssec_generate_key(ctx, flags, &key); + if (ret != KNOT_EOK) { + return ret; + } + + key->timing = gen_timing; + + if (addtopolicy != NULL) { + char *last_policy_last = NULL; + + knot_dname_t *unused = NULL; + ret = kasp_db_get_policy_last(ctx->kasp_db, addtopolicy, &unused, + &last_policy_last); + knot_dname_free(unused, NULL); + if (ret != KNOT_EOK && ret != KNOT_ENOENT) { + return ret; + } + + ret = kasp_db_set_policy_last(ctx->kasp_db, addtopolicy, last_policy_last, + ctx->zone->dname, key->id); + free(last_policy_last); + if (ret != KNOT_EOK) { + return ret; + } + } + + ret = kdnssec_ctx_commit(ctx); + + if (ret == KNOT_EOK) { + printf("%s\n", key->id); + } + + return ret; +} + +static void parse_record(zs_scanner_t *scanner) +{ + dnssec_key_t *key = scanner->process.data; + + if (dnssec_key_get_dname(key) != NULL || + scanner->r_type != KNOT_RRTYPE_DNSKEY) { + scanner->state = ZS_STATE_STOP; + return; + } + + dnssec_binary_t rdata = { + .data = scanner->r_data, + .size = scanner->r_data_length + }; + dnssec_key_set_dname(key, scanner->dname); + dnssec_key_set_rdata(key, &rdata); +} + +int bind_pubkey_parse(const char *filename, dnssec_key_t **key_ptr) +{ + dnssec_key_t *key = NULL; + int result = dnssec_key_new(&key); + if (result != DNSSEC_EOK) { + return KNOT_ENOMEM; + } + + uint16_t cls = KNOT_CLASS_IN; + uint32_t ttl = 0; + zs_scanner_t *scanner = malloc(sizeof(zs_scanner_t)); + if (scanner == NULL) { + dnssec_key_free(key); + return KNOT_ENOMEM; + } + + if (zs_init(scanner, ".", cls, ttl) != 0 || + zs_set_input_file(scanner, filename) != 0 || + zs_set_processing(scanner, parse_record, NULL, key) != 0 || + zs_parse_all(scanner) != 0) { + int ret; + switch (scanner->error.code) { + case ZS_FILE_OPEN: + case ZS_FILE_INVALID: + ret = KNOT_EFILE; + break; + default: + ret = KNOT_EPARSEFAIL; + } + zs_deinit(scanner); + free(scanner); + dnssec_key_free(key); + return ret; + } + zs_deinit(scanner); + free(scanner); + + if (dnssec_key_get_dname(key) == NULL) { + dnssec_key_free(key); + return KNOT_INVALID_PUBLIC_KEY; + } + + *key_ptr = key; + return KNOT_EOK; +} + +static char *gen_keyfilename(const char *orig, const char *wantsuff, const char *altsuff) +{ + assert(orig && wantsuff && altsuff); + + const char *dot = strrchr(orig, '.'); + + if (dot != NULL && strcmp(dot, wantsuff) == 0) { // Full match. + return strdup(orig); + } else if (dot != NULL && strcmp(dot, altsuff) == 0) { // Replace suffix. + return sprintf_alloc("%.*s%s", (int)(dot - orig), orig, wantsuff); + } else { // Add wanted suffix. + return sprintf_alloc("%s%s", orig, wantsuff); + } +} + +int keymgr_import_bind(kdnssec_ctx_t *ctx, const char *import_file, bool pub_only) +{ + if (ctx == NULL || import_file == NULL) { + return KNOT_EINVAL; + } + + knot_kasp_key_timing_t timing = { ctx->now, 0 }; + dnssec_key_t *key = NULL; + char *keyid = NULL; + + char *pubname = gen_keyfilename(import_file, ".key", ".private"); + if (pubname == NULL) { + return KNOT_EINVAL; + } + + int ret = bind_pubkey_parse(pubname, &key); + free(pubname); + if (ret != KNOT_EOK) { + goto fail; + } + + if (!pub_only) { + bind_privkey_t bpriv = { 0 }; + + char *privname = gen_keyfilename(import_file, ".private", ".key"); + if (privname == NULL) { + goto fail; + } + + ret = bind_privkey_parse(privname, &bpriv); + free(privname); + if (ret != DNSSEC_EOK) { + goto fail; + } + + dnssec_binary_t pem = { 0 }; + ret = bind_privkey_to_pem(key, &bpriv, &pem); + if (ret != DNSSEC_EOK) { + bind_privkey_free(&bpriv); + goto fail; + } + + bind_privkey_to_timing(&bpriv, &timing); + + bind_privkey_free(&bpriv); + + ret = dnssec_keystore_import(ctx->keystore, &pem, &keyid); + dnssec_binary_free(&pem); + if (ret != DNSSEC_EOK) { + goto fail; + } + } else { + timing.publish = ctx->now; + + ret = dnssec_key_get_keyid(key, &keyid); + if (ret != DNSSEC_EOK) { + goto fail; + } + } + + // allocate kasp key + knot_kasp_key_t *kkey = calloc(1, sizeof(*kkey)); + if (!kkey) { + ret = KNOT_ENOMEM; + goto fail; + } + + kkey->id = keyid; + kkey->key = key; + kkey->timing = timing; + kkey->is_pub_only = pub_only; + kkey->is_ksk = (dnssec_key_get_flags(kkey->key) == DNSKEY_FLAGS_KSK); + kkey->is_zsk = !kkey->is_ksk; + + // append to zone + ret = kasp_zone_append(ctx->zone, kkey); + free(kkey); + if (ret != KNOT_EOK) { + goto fail; + } + ret = kdnssec_ctx_commit(ctx); + if (ret == KNOT_EOK) { + printf("%s\n", keyid); + return KNOT_EOK; + } +fail: + dnssec_key_free(key); + free(keyid); + return knot_error_from_libdnssec(ret); +} + +static int import_key(kdnssec_ctx_t *ctx, unsigned backend, const char *param, + int argc, char *argv[]) +{ + if (ctx == NULL || param == NULL) { + return KNOT_EINVAL; + } + + // parse params + knot_time_t now = knot_time(); + knot_kasp_key_timing_t timing = { .publish = now, .active = now }; + kdnssec_generate_flags_t flags = 0; + uint16_t keysize = 0; + if (!genkeyargs(argc, argv, false, &flags, &ctx->policy->algorithm, + &keysize, &timing, NULL)) { + return KNOT_EINVAL; + } + + int ret = check_timers(&timing); + if (ret != KNOT_EOK) { + return ret; + } + + normalize_generate_flags(&flags); + + dnssec_key_t *key = NULL; + char *keyid = NULL; + + if (backend == KEYSTORE_BACKEND_PEM) { + // open file + int fd = open(param, O_RDONLY, 0); + if (fd == -1) { + return knot_map_errno(); + } + + // determine size + off_t fsize = lseek(fd, 0, SEEK_END); + if (fsize == -1) { + close(fd); + return knot_map_errno(); + } + if (lseek(fd, 0, SEEK_SET) == -1) { + close(fd); + return knot_map_errno(); + } + + // alloc memory + dnssec_binary_t pem = { 0 }; + ret = dnssec_binary_alloc(&pem, fsize); + if (ret != DNSSEC_EOK) { + close(fd); + goto fail; + } + + // read pem + ssize_t read_count = read(fd, pem.data, pem.size); + close(fd); + if (read_count == -1) { + dnssec_binary_free(&pem); + ret = knot_map_errno(); + goto fail; + } + + // put pem to kesytore + ret = dnssec_keystore_import(ctx->keystore, &pem, &keyid); + dnssec_binary_free(&pem); + if (ret != DNSSEC_EOK) { + goto fail; + } + } else { + assert(backend == KEYSTORE_BACKEND_PKCS11); + keyid = strdup(param); + } + + // create dnssec key + ret = dnssec_key_new(&key); + if (ret != DNSSEC_EOK) { + goto fail; + } + ret = dnssec_key_set_dname(key, ctx->zone->dname); + if (ret != DNSSEC_EOK) { + goto fail; + } + dnssec_key_set_flags(key, dnskey_flags(flags & DNSKEY_GENERATE_SEP_ON)); + dnssec_key_set_algorithm(key, ctx->policy->algorithm); + + // fill key structure from keystore (incl. pubkey from privkey computation) + ret = dnssec_keystore_get_private(ctx->keystore, keyid, key); + if (ret != DNSSEC_EOK) { + goto fail; + } + + // allocate kasp key + knot_kasp_key_t *kkey = calloc(1, sizeof(*kkey)); + if (kkey == NULL) { + ret = KNOT_ENOMEM; + goto fail; + } + kkey->id = keyid; + kkey->key = key; + kkey->timing = timing; + kkey->is_ksk = (flags & DNSKEY_GENERATE_KSK); + kkey->is_zsk = (flags & DNSKEY_GENERATE_ZSK); + + // append to zone + ret = kasp_zone_append(ctx->zone, kkey); + free(kkey); + if (ret != KNOT_EOK) { + goto fail; + } + ret = kdnssec_ctx_commit(ctx); + if (ret == KNOT_EOK) { + printf("%s\n", keyid); + return KNOT_EOK; + } +fail: + dnssec_key_free(key); + free(keyid); + return knot_error_from_libdnssec(ret); +} + +int keymgr_import_pem(kdnssec_ctx_t *ctx, const char *import_file, int argc, char *argv[]) +{ + return import_key(ctx, KEYSTORE_BACKEND_PEM, import_file, argc, argv); +} + +int keymgr_import_pkcs11(kdnssec_ctx_t *ctx, char *key_id, int argc, char *argv[]) +{ + if (!dnssec_keyid_is_valid(key_id)) { + return DNSSEC_INVALID_KEY_ID; + } + dnssec_keyid_normalize(key_id); + return import_key(ctx, KEYSTORE_BACKEND_PKCS11, key_id, argc, argv); +} + +int keymgr_nsec3_salt_print(kdnssec_ctx_t *ctx) +{ + dnssec_binary_t salt_bin; + knot_time_t created; + int ret = kasp_db_load_nsec3salt(ctx->kasp_db, ctx->zone->dname, + &salt_bin, &created); + switch (ret) { + case KNOT_EOK: + printf("Current salt: "); + if (salt_bin.size == 0) { + printf("-"); + } + for (size_t i = 0; i < salt_bin.size; i++) { + printf("%02X", (unsigned)salt_bin.data[i]); + } + printf("\n"); + free(salt_bin.data); + break; + case KNOT_ENOENT: + printf("-- no salt --\n"); + ret = KNOT_EOK; + break; + } + return ret; +} + +int keymgr_nsec3_salt_set(kdnssec_ctx_t *ctx, const char *new_salt) +{ + assert(new_salt); + + dnssec_binary_t salt_bin = { 0 }; + if (strcmp(new_salt, "-") != 0) { + salt_bin.data = hex_to_bin(new_salt, &salt_bin.size); + if (salt_bin.data == NULL) { + return KNOT_EMALF; + } + } + if (salt_bin.size != ctx->policy->nsec3_salt_length) { + printf("Warning: specified salt doesn't match configured " + "salt length (%d).\n", + (int)ctx->policy->nsec3_salt_length); + } + int ret = kasp_db_store_nsec3salt(ctx->kasp_db, ctx->zone->dname, + &salt_bin, knot_time()); + if (salt_bin.size > 0) { + free(salt_bin.data); + } + return ret; +} + +int keymgr_serial_print(kdnssec_ctx_t *ctx) +{ + uint32_t serial = 0; + int ret = kasp_db_load_serial(ctx->kasp_db, ctx->zone->dname, + KASPDB_SERIAL_LASTSIGNED, &serial); + switch (ret) { + case KNOT_EOK: + printf("Current serial: %u\n", serial); + break; + case KNOT_ENOENT: + printf("-- no serial --\n"); + ret = KNOT_EOK; + break; + } + return ret; +} + +int keymgr_serial_set(kdnssec_ctx_t *ctx, uint32_t new_serial) +{ + return kasp_db_store_serial(ctx->kasp_db, ctx->zone->dname, + KASPDB_SERIAL_LASTSIGNED, new_serial); +} + +static void print_tsig(dnssec_tsig_algorithm_t mac, const char *name, + const dnssec_binary_t *secret) +{ + assert(name); + assert(secret); + + const char *mac_name = dnssec_tsig_algorithm_to_name(mac); + assert(mac_name); + + // client format (as a comment) + printf("# %s:%s:%.*s\n", mac_name, name, (int)secret->size, secret->data); + + // server format + printf("key:\n"); + printf(" - id: %s\n", name); + printf(" algorithm: %s\n", mac_name); + printf(" secret: %.*s\n", (int)secret->size, secret->data); +} + +int keymgr_generate_tsig(const char *tsig_name, const char *alg_name, int bits) +{ + dnssec_tsig_algorithm_t alg = dnssec_tsig_algorithm_from_name(alg_name); + if (alg == DNSSEC_TSIG_UNKNOWN) { + return KNOT_INVALID_KEY_ALGORITHM; + } + + int optimal_bits = dnssec_tsig_optimal_key_size(alg); + if (bits == 0) { + bits = optimal_bits; // TODO review + } + + // round up bits to bytes + bits = (bits + CHAR_BIT - 1) / CHAR_BIT * CHAR_BIT; + + if (bits != optimal_bits) { + printf("Notice: Optimal key size for %s is %d bits.", + dnssec_tsig_algorithm_to_name(alg), optimal_bits); + } + assert(bits % CHAR_BIT == 0); + + _cleanup_binary_ dnssec_binary_t key = { 0 }; + int r = dnssec_binary_alloc(&key, bits / CHAR_BIT); + if (r != DNSSEC_EOK) { + ERROR("failed to allocate memory\n"); + return knot_error_from_libdnssec(r); + } + + r = gnutls_rnd(GNUTLS_RND_KEY, key.data, key.size); + if (r != 0) { + ERROR("failed to generate secret the key\n"); + return knot_error_from_libdnssec(r); + } + + _cleanup_binary_ dnssec_binary_t key_b64 = { 0 }; + r = dnssec_binary_to_base64(&key, &key_b64); + if (r != DNSSEC_EOK) { + ERROR("failed to convert the key to Base64\n"); + return knot_error_from_libdnssec(r); + } + + print_tsig(alg, tsig_name, &key_b64); + + return KNOT_EOK; +} + +static bool is_hex(const char *string) +{ + for (const char *p = string; *p != '\0'; p++) { + if (!is_xdigit(*p)) { + return false; + } + } + return (*string != '\0'); +} + +int keymgr_get_key(kdnssec_ctx_t *ctx, const char *key_spec, knot_kasp_key_t **key) +{ + // Check if type of key spec is prescribed. + bool is_keytag = false, is_id = false; + if (strncasecmp(key_spec, "keytag=", 7) == 0) { + key_spec += 7; + is_keytag = true; + } else if (strncasecmp(key_spec, "id=", 3) == 0) { + key_spec += 3; + is_id = true; + } + + uint16_t keytag = 0; + bool can_be_keytag = (str_to_u16(key_spec, &keytag) == KNOT_EOK); + long spec_len = strlen(key_spec); + + // Check if input is a valid key spec. + if ((is_keytag && !can_be_keytag) || + (is_id && !is_hex(key_spec)) || + (!can_be_keytag && !is_hex(key_spec))) { + ERROR("invalid key specification\n"); + return KNOT_EINVAL; + } + + *key = NULL; + for (size_t i = 0; i < ctx->zone->num_keys; i++) { + knot_kasp_key_t *candidate = &ctx->zone->keys[i]; + + bool keyid_match = strncmp(candidate->id, key_spec, spec_len) == 0; // May be just a prefix. + bool keytag_match = can_be_keytag && + dnssec_key_get_keytag(candidate->key) == keytag; + + // Terminate if found exact key ID match. + if (keyid_match && !is_keytag && strlen(candidate->id) == spec_len) { + *key = candidate; + break; + } + // Check for key ID prefix or tag match. + if ((is_keytag && keytag_match) || // Tag is prescribed. + (is_id && keyid_match) || // Key ID is prescribed. + ((!is_keytag && !is_id) && (keyid_match || keytag_match))) { // Nothing is prescribed. + if (*key == NULL) { + *key = candidate; + } else { + ERROR("key is not specified uniquely. Please use id=Full_Key_ID\n"); + return KNOT_EINVAL; + } + } + } + if (*key == NULL) { + ERROR("key not found\n"); + return KNOT_ENOENT; + } + return KNOT_EOK; +} + +int keymgr_foreign_key_id(char *argv[], knot_lmdb_db_t *kaspdb, knot_dname_t **key_zone, char **key_id) +{ + *key_zone = knot_dname_from_str_alloc(argv[3]); + if (*key_zone == NULL) { + return KNOT_ENOMEM; + } + knot_dname_to_lower(*key_zone); + + kdnssec_ctx_t kctx = { 0 }; + int ret = kdnssec_ctx_init(conf(), &kctx, *key_zone, kaspdb, NULL); + if (ret != KNOT_EOK) { + ERROR("failed to initialize zone %s (%s)\n", argv[0], knot_strerror(ret)); + free(*key_zone); + *key_zone = NULL; + return KNOT_ENOZONE; + } + knot_kasp_key_t *key; + ret = keymgr_get_key(&kctx, argv[2], &key); + if (ret == KNOT_EOK) { + *key_id = strdup(key->id); + if (*key_id == NULL) { + ret = KNOT_ENOMEM; + } + } + kdnssec_ctx_deinit(&kctx); + return ret; +} + +int keymgr_set_timing(knot_kasp_key_t *key, int argc, char *argv[]) +{ + knot_kasp_key_timing_t temp = key->timing; + kdnssec_generate_flags_t flags = ((key->is_ksk ? DNSKEY_GENERATE_KSK : 0) | (key->is_zsk ? DNSKEY_GENERATE_ZSK : 0)); + + if (genkeyargs(argc, argv, true, &flags, NULL, NULL, &temp, NULL)) { + int ret = check_timers(&temp); + if (ret != KNOT_EOK) { + return ret; + } + key->timing = temp; + if (key->is_ksk != (bool)(flags & DNSKEY_GENERATE_KSK) || + key->is_zsk != (bool)(flags & DNSKEY_GENERATE_ZSK) || + flags & DNSKEY_GENERATE_SEP_SPEC) { + normalize_generate_flags(&flags); + key->is_ksk = (flags & DNSKEY_GENERATE_KSK); + key->is_zsk = (flags & DNSKEY_GENERATE_ZSK); + return dnssec_key_set_flags(key->key, dnskey_flags(flags & DNSKEY_GENERATE_SEP_ON)); + } + return KNOT_EOK; + } + return KNOT_EINVAL; +} + +static void print_timer(const char *name, knot_time_t t, knot_time_print_t format, + char separator) +{ + static char buff[100]; + if (knot_time_print(format, t, buff, sizeof(buff)) < 0) { + printf("%s=(error)%c", name, separator); // shall not happen + } else { + printf("%s=%s%c", name, buff, separator); + } +} + +int keymgr_list_keys(kdnssec_ctx_t *ctx, knot_time_print_t format) +{ + for (size_t i = 0; i < ctx->zone->num_keys; i++) { + knot_kasp_key_t *key = &ctx->zone->keys[i]; + printf("%s ksk=%s zsk=%s tag=%05d algorithm=%-2d size=%-4u public-only=%s ", key->id, + (key->is_ksk ? "yes" : "no "), (key->is_zsk ? "yes" : "no "), + dnssec_key_get_keytag(key->key), (int)dnssec_key_get_algorithm(key->key), + dnssec_key_get_size(key->key), (key->is_pub_only ? "yes" : "no ")); + print_timer("pre-active", key->timing.pre_active, format, ' '); + print_timer("publish", key->timing.publish, format, ' '); + print_timer("ready", key->timing.ready, format, ' '); + print_timer("active", key->timing.active, format, ' '); + print_timer("retire-active", key->timing.retire_active, format, ' '); + print_timer("retire", key->timing.retire, format, ' '); + print_timer("post-active", key->timing.post_active, format, ' '); + print_timer("revoke", key->timing.revoke, format, ' '); + print_timer("remove", key->timing.remove, format, '\n'); + } + return KNOT_EOK; +} + +static int print_ds(const knot_dname_t *dname, const dnssec_binary_t *rdata) +{ + wire_ctx_t ctx = wire_ctx_init(rdata->data, rdata->size); + if (wire_ctx_available(&ctx) < 4) { + return KNOT_EMALF; + } + + char *name = knot_dname_to_str_alloc(dname); + if (!name) { + return KNOT_ENOMEM; + } + + uint16_t keytag = wire_ctx_read_u16(&ctx); + uint8_t algorithm = wire_ctx_read_u8(&ctx); + uint8_t digest_type = wire_ctx_read_u8(&ctx); + + size_t digest_size = wire_ctx_available(&ctx); + + printf("%s DS %d %d %d ", name, keytag, algorithm, digest_type); + for (size_t i = 0; i < digest_size; i++) { + printf("%02x", ctx.position[i]); + } + printf("\n"); + + free(name); + return KNOT_EOK; +} + +static int create_and_print_ds(const knot_dname_t *zone_name, + const dnssec_key_t *key, dnssec_key_digest_t digest) +{ + _cleanup_binary_ dnssec_binary_t rdata = { 0 }; + int r = dnssec_key_create_ds(key, digest, &rdata); + if (r != DNSSEC_EOK) { + return knot_error_from_libdnssec(r); + } + + return print_ds(zone_name, &rdata); +} + +int keymgr_generate_ds(const knot_dname_t *dname, const knot_kasp_key_t *key) +{ + static const dnssec_key_digest_t digests[] = { + DNSSEC_KEY_DIGEST_SHA256, + DNSSEC_KEY_DIGEST_SHA384, + 0 + }; + + int ret = KNOT_EOK; + for (int i = 0; digests[i] != 0 && ret == KNOT_EOK; i++) { + ret = create_and_print_ds(dname, key->key, digests[i]); + } + + return ret; +} + +int keymgr_generate_dnskey(const knot_dname_t *dname, const knot_kasp_key_t *key) +{ + const dnssec_key_t *dnskey = key->key; + + char *name = knot_dname_to_str_alloc(dname); + if (!name) { + return KNOT_ENOMEM; + } + + uint16_t flags = dnssec_key_get_flags(dnskey); + uint8_t algorithm = dnssec_key_get_algorithm(dnskey); + + dnssec_binary_t pubkey = { 0 }; + int ret = dnssec_key_get_pubkey(dnskey, &pubkey); + if (ret != DNSSEC_EOK) { + free(name); + return knot_error_from_libdnssec(ret); + } + + uint8_t *base64_output = NULL; + int len = knot_base64_encode_alloc(pubkey.data, pubkey.size, &base64_output); + if (len < 0) { + free(name); + return len; + } + + printf("%s DNSKEY %u 3 %u %.*s\n", name, flags, algorithm, len, base64_output); + + free(base64_output); + free(name); + return KNOT_EOK; +} |