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Diffstat (limited to '')
| -rw-r--r-- | tools/cred_verify.c | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/tools/cred_verify.c b/tools/cred_verify.c new file mode 100644 index 0000000..3eae435 --- /dev/null +++ b/tools/cred_verify.c @@ -0,0 +1,182 @@ +/* + * Copyright (c) 2018 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 <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_cred_t * +prepare_cred(FILE *in_f, int type, int flags) +{ + fido_cred_t *cred = NULL; + struct blob cdh; + struct blob authdata; + struct blob id; + struct blob sig; + struct blob x5c; + char *rpid = NULL; + char *fmt = NULL; + int r; + + memset(&cdh, 0, sizeof(cdh)); + memset(&authdata, 0, sizeof(authdata)); + memset(&id, 0, sizeof(id)); + memset(&sig, 0, sizeof(sig)); + memset(&x5c, 0, sizeof(x5c)); + + r = base64_read(in_f, &cdh); + r |= string_read(in_f, &rpid); + r |= string_read(in_f, &fmt); + r |= base64_read(in_f, &authdata); + r |= base64_read(in_f, &id); + r |= base64_read(in_f, &sig); + if (r < 0) + errx(1, "input error"); + + (void)base64_read(in_f, &x5c); + + 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, "format: %s\n", fmt); + fprintf(stderr, "authenticator data:\n"); + xxd(authdata.ptr, authdata.len); + fprintf(stderr, "credential id:\n"); + xxd(id.ptr, id.len); + fprintf(stderr, "signature:\n"); + xxd(sig.ptr, sig.len); + fprintf(stderr, "x509:\n"); + xxd(x5c.ptr, x5c.len); + } + + if ((cred = fido_cred_new()) == NULL) + errx(1, "fido_cred_new"); + + if ((r = fido_cred_set_type(cred, type)) != FIDO_OK || + (r = fido_cred_set_clientdata_hash(cred, cdh.ptr, + cdh.len)) != FIDO_OK || + (r = fido_cred_set_rp(cred, rpid, NULL)) != FIDO_OK || + (r = fido_cred_set_authdata(cred, authdata.ptr, + authdata.len)) != FIDO_OK || + (r = fido_cred_set_sig(cred, sig.ptr, sig.len)) != FIDO_OK || + (r = fido_cred_set_fmt(cred, fmt)) != FIDO_OK) + errx(1, "fido_cred_set: %s", fido_strerr(r)); + + if (x5c.ptr != NULL) { + if ((r = fido_cred_set_x509(cred, x5c.ptr, x5c.len)) != FIDO_OK) + errx(1, "fido_cred_set_x509: %s", fido_strerr(r)); + } + + if (flags & FLAG_UV) { + if ((r = fido_cred_set_uv(cred, FIDO_OPT_TRUE)) != FIDO_OK) + errx(1, "fido_cred_set_uv: %s", fido_strerr(r)); + } + if (flags & FLAG_HMAC) { + if ((r = fido_cred_set_extensions(cred, + FIDO_EXT_HMAC_SECRET)) != FIDO_OK) + errx(1, "fido_cred_set_extensions: %s", fido_strerr(r)); + } + + free(cdh.ptr); + free(authdata.ptr); + free(id.ptr); + free(sig.ptr); + free(x5c.ptr); + free(rpid); + free(fmt); + + return (cred); +} + +int +cred_verify(int argc, char **argv) +{ + fido_cred_t *cred = NULL; + char *in_path = NULL; + char *out_path = NULL; + FILE *in_f = NULL; + FILE *out_f = NULL; + int type = COSE_ES256; + int flags = 0; + int cred_prot = -1; + int ch; + int r; + + while ((ch = getopt(argc, argv, "c:dhi:o:v")) != -1) { + switch (ch) { + case 'c': + if ((cred_prot = base10(optarg)) < 0) + errx(1, "-c: invalid argument '%s'", optarg); + break; + case 'd': + flags |= FLAG_DEBUG; + break; + case 'h': + flags |= FLAG_HMAC; + break; + case 'i': + in_path = optarg; + break; + case 'o': + out_path = optarg; + break; + case 'v': + flags |= FLAG_UV; + break; + default: + usage(); + } + } + + argc -= optind; + argv += optind; + + if (argc > 1) + usage(); + + in_f = open_read(in_path); + out_f = open_write(out_path); + + if (argc > 0 && cose_type(argv[0], &type) < 0) + errx(1, "unknown type %s", argv[0]); + + fido_init((flags & FLAG_DEBUG) ? FIDO_DEBUG : 0); + cred = prepare_cred(in_f, type, flags); + + if (cred_prot > 0) { + r = fido_cred_set_prot(cred, cred_prot); + if (r != FIDO_OK) { + errx(1, "fido_cred_set_prot: %s", fido_strerr(r)); + } + } + + if (fido_cred_x5c_ptr(cred) == NULL) { + if ((r = fido_cred_verify_self(cred)) != FIDO_OK) + errx(1, "fido_cred_verify_self: %s", fido_strerr(r)); + } else { + if ((r = fido_cred_verify(cred)) != FIDO_OK) + errx(1, "fido_cred_verify: %s", fido_strerr(r)); + } + + print_cred(out_f, type, cred); + fido_cred_free(&cred); + + fclose(in_f); + fclose(out_f); + in_f = NULL; + out_f = NULL; + + exit(0); +} |