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Diffstat (limited to '')
| -rw-r--r-- | tools/assert_verify.c | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/tools/assert_verify.c b/tools/assert_verify.c new file mode 100644 index 0000000..4cc2e86 --- /dev/null +++ b/tools/assert_verify.c @@ -0,0 +1,208 @@ +/* + * Copyright (c) 2018-2022 Yubico AB. All rights reserved. + * Use of this source code is governed by a BSD-style + * license that can be found in the LICENSE file. + * SPDX-License-Identifier: BSD-2-Clause + */ + +#include <fido.h> +#include <fido/es256.h> +#include <fido/es384.h> +#include <fido/rs256.h> +#include <fido/eddsa.h> + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#ifdef HAVE_UNISTD_H +#include <unistd.h> +#endif + +#include "../openbsd-compat/openbsd-compat.h" +#include "extern.h" + +static fido_assert_t * +prepare_assert(FILE *in_f, int flags) +{ + fido_assert_t *assert = NULL; + struct blob cdh; + struct blob authdata; + struct blob sig; + char *rpid = NULL; + int r; + + memset(&cdh, 0, sizeof(cdh)); + memset(&authdata, 0, sizeof(authdata)); + memset(&sig, 0, sizeof(sig)); + + r = base64_read(in_f, &cdh); + r |= string_read(in_f, &rpid); + r |= base64_read(in_f, &authdata); + r |= base64_read(in_f, &sig); + if (r < 0) + errx(1, "input error"); + + if (flags & FLAG_DEBUG) { + fprintf(stderr, "client data hash:\n"); + xxd(cdh.ptr, cdh.len); + fprintf(stderr, "relying party id: %s\n", rpid); + fprintf(stderr, "authenticator data:\n"); + xxd(authdata.ptr, authdata.len); + fprintf(stderr, "signature:\n"); + xxd(sig.ptr, sig.len); + } + + if ((assert = fido_assert_new()) == NULL) + errx(1, "fido_assert_new"); + if ((r = fido_assert_set_count(assert, 1)) != FIDO_OK) + errx(1, "fido_assert_count: %s", fido_strerr(r)); + + if ((r = fido_assert_set_clientdata_hash(assert, cdh.ptr, + cdh.len)) != FIDO_OK || + (r = fido_assert_set_rp(assert, rpid)) != FIDO_OK || + (r = fido_assert_set_authdata(assert, 0, authdata.ptr, + authdata.len)) != FIDO_OK || + (r = fido_assert_set_sig(assert, 0, sig.ptr, sig.len)) != FIDO_OK) + errx(1, "fido_assert_set: %s", fido_strerr(r)); + + if (flags & FLAG_UP) { + if ((r = fido_assert_set_up(assert, FIDO_OPT_TRUE)) != FIDO_OK) + errx(1, "fido_assert_set_up: %s", fido_strerr(r)); + } + if (flags & FLAG_UV) { + if ((r = fido_assert_set_uv(assert, FIDO_OPT_TRUE)) != FIDO_OK) + errx(1, "fido_assert_set_uv: %s", fido_strerr(r)); + } + if (flags & FLAG_HMAC) { + if ((r = fido_assert_set_extensions(assert, + FIDO_EXT_HMAC_SECRET)) != FIDO_OK) + errx(1, "fido_assert_set_extensions: %s", + fido_strerr(r)); + } + + free(cdh.ptr); + free(authdata.ptr); + free(sig.ptr); + free(rpid); + + return (assert); +} + +static void * +load_pubkey(int type, const char *file) +{ + EC_KEY *ec = NULL; + RSA *rsa = NULL; + EVP_PKEY *eddsa = NULL; + es256_pk_t *es256_pk = NULL; + es384_pk_t *es384_pk = NULL; + rs256_pk_t *rs256_pk = NULL; + eddsa_pk_t *eddsa_pk = NULL; + void *pk = NULL; + + switch (type) { + case COSE_ES256: + if ((ec = read_ec_pubkey(file)) == NULL) + errx(1, "read_ec_pubkey"); + if ((es256_pk = es256_pk_new()) == NULL) + errx(1, "es256_pk_new"); + if (es256_pk_from_EC_KEY(es256_pk, ec) != FIDO_OK) + errx(1, "es256_pk_from_EC_KEY"); + pk = es256_pk; + EC_KEY_free(ec); + break; + case COSE_ES384: + if ((ec = read_ec_pubkey(file)) == NULL) + errx(1, "read_ec_pubkey"); + if ((es384_pk = es384_pk_new()) == NULL) + errx(1, "es384_pk_new"); + if (es384_pk_from_EC_KEY(es384_pk, ec) != FIDO_OK) + errx(1, "es384_pk_from_EC_KEY"); + pk = es384_pk; + EC_KEY_free(ec); + break; + case COSE_RS256: + if ((rsa = read_rsa_pubkey(file)) == NULL) + errx(1, "read_rsa_pubkey"); + if ((rs256_pk = rs256_pk_new()) == NULL) + errx(1, "rs256_pk_new"); + if (rs256_pk_from_RSA(rs256_pk, rsa) != FIDO_OK) + errx(1, "rs256_pk_from_RSA"); + pk = rs256_pk; + RSA_free(rsa); + break; + case COSE_EDDSA: + if ((eddsa = read_eddsa_pubkey(file)) == NULL) + errx(1, "read_eddsa_pubkey"); + if ((eddsa_pk = eddsa_pk_new()) == NULL) + errx(1, "eddsa_pk_new"); + if (eddsa_pk_from_EVP_PKEY(eddsa_pk, eddsa) != FIDO_OK) + errx(1, "eddsa_pk_from_EVP_PKEY"); + pk = eddsa_pk; + EVP_PKEY_free(eddsa); + break; + default: + errx(1, "invalid type %d", type); + } + + return (pk); +} + +int +assert_verify(int argc, char **argv) +{ + fido_assert_t *assert = NULL; + void *pk = NULL; + char *in_path = NULL; + FILE *in_f = NULL; + int type = COSE_ES256; + int flags = 0; + int ch; + int r; + + while ((ch = getopt(argc, argv, "dhi:pv")) != -1) { + switch (ch) { + case 'd': + flags |= FLAG_DEBUG; + break; + case 'h': + flags |= FLAG_HMAC; + break; + case 'i': + in_path = optarg; + break; + case 'p': + flags |= FLAG_UP; + break; + case 'v': + flags |= FLAG_UV; + break; + default: + usage(); + } + } + + argc -= optind; + argv += optind; + + if (argc < 1 || argc > 2) + usage(); + + in_f = open_read(in_path); + + if (argc > 1 && cose_type(argv[1], &type) < 0) + errx(1, "unknown type %s", argv[1]); + + fido_init((flags & FLAG_DEBUG) ? FIDO_DEBUG : 0); + + pk = load_pubkey(type, argv[0]); + assert = prepare_assert(in_f, flags); + if ((r = fido_assert_verify(assert, 0, type, pk)) != FIDO_OK) + errx(1, "fido_assert_verify: %s", fido_strerr(r)); + fido_assert_free(&assert); + + fclose(in_f); + in_f = NULL; + + exit(0); +} |