1 files changed, 221 insertions, 0 deletions

diff --git a/tools/cred_make.c b/tools/cred_make.c
new file mode 100644
index 0000000..380c67a
--- /dev/null
+++ b/tools/cred_make.c
@@ -0,0 +1,221 @@
+/*
+ * 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.
+ */
+
+#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 uid;
+        char *rpid = NULL;
+        char *uname = NULL;
+        int r;
+
+        memset(&cdh, 0, sizeof(cdh));
+        memset(&uid, 0, sizeof(uid));
+
+        r = base64_read(in_f, &cdh);
+        r |= string_read(in_f, &rpid);
+        r |= string_read(in_f, &uname);
+        r |= base64_read(in_f, &uid);
+        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, "user name: %s\n", uname);
+                fprintf(stderr, "user id:\n");
+                xxd(uid.ptr, uid.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_user(cred, uid.ptr, uid.len, uname, NULL,
+            NULL)) != FIDO_OK)
+                errx(1, "fido_cred_set: %s", fido_strerr(r));
+
+        if (flags & FLAG_RK) {
+                if ((r = fido_cred_set_rk(cred, FIDO_OPT_TRUE)) != FIDO_OK)
+                        errx(1, "fido_cred_set_rk: %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(uid.ptr);
+        free(rpid);
+        free(uname);
+
+        return (cred);
+}
+
+static void
+print_attcred(FILE *out_f, const fido_cred_t *cred)
+{
+        char *cdh = NULL;
+        char *authdata = NULL;
+        char *id = NULL;
+        char *sig = NULL;
+        char *x5c = NULL;
+        int r;
+
+        r = base64_encode(fido_cred_clientdata_hash_ptr(cred),
+            fido_cred_clientdata_hash_len(cred), &cdh);
+        r |= base64_encode(fido_cred_authdata_ptr(cred),
+            fido_cred_authdata_len(cred), &authdata);
+        r |= base64_encode(fido_cred_id_ptr(cred), fido_cred_id_len(cred),
+            &id);
+        r |= base64_encode(fido_cred_sig_ptr(cred), fido_cred_sig_len(cred),
+            &sig);
+        if (fido_cred_x5c_ptr(cred) != NULL)
+                r |= base64_encode(fido_cred_x5c_ptr(cred),
+                    fido_cred_x5c_len(cred), &x5c);
+        if (r < 0)
+                errx(1, "output error");
+
+        fprintf(out_f, "%s\n", cdh);
+        fprintf(out_f, "%s\n", fido_cred_rp_id(cred));
+        fprintf(out_f, "%s\n", fido_cred_fmt(cred));
+        fprintf(out_f, "%s\n", authdata);
+        fprintf(out_f, "%s\n", id);
+        fprintf(out_f, "%s\n", sig);
+        if (x5c != NULL)
+                fprintf(out_f, "%s\n", x5c);
+
+        free(cdh);
+        free(authdata);
+        free(id);
+        free(sig);
+        free(x5c);
+}
+
+int
+cred_make(int argc, char **argv)
+{
+        fido_dev_t *dev = NULL;
+        fido_cred_t *cred = NULL;
+        char prompt[1024];
+        char pin[1024];
+        char *in_path = NULL;
+        char *out_path = NULL;
+        FILE *in_f = NULL;
+        FILE *out_f = NULL;
+        int type = COSE_ES256;
+        int flags = 0;
+        int ch;
+        int r;
+
+        while ((ch = getopt(argc, argv, "dhi:o:qruv")) != -1) {
+                switch (ch) {
+                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 'q':
+                        flags |= FLAG_QUIET;
+                        break;
+                case 'r':
+                        flags |= FLAG_RK;
+                        break;
+                case 'u':
+                        flags |= FLAG_U2F;
+                        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);
+        out_f = open_write(out_path);
+
+        if (argc > 1) {
+                if (strcmp(argv[1], "es256") == 0)
+                        type = COSE_ES256;
+                else if (strcmp(argv[1], "rs256") == 0)
+                        type = COSE_RS256;
+                else if (strcmp(argv[1], "eddsa") == 0)
+                        type = COSE_EDDSA;
+                else
+                        errx(1, "unknown type %s", argv[1]);
+        }
+
+        fido_init((flags & FLAG_DEBUG) ? FIDO_DEBUG : 0);
+
+        cred = prepare_cred(in_f, type, flags);
+
+        dev = open_dev(argv[0]);
+        if (flags & FLAG_U2F)
+                fido_dev_force_u2f(dev);
+
+        r = fido_dev_make_cred(dev, cred, NULL);
+        if (r == FIDO_ERR_PIN_REQUIRED && !(flags & FLAG_QUIET)) {
+                r = snprintf(prompt, sizeof(prompt), "Enter PIN for %s: ",
+                    argv[0]);
+                if (r < 0 || (size_t)r >= sizeof(prompt))
+                        errx(1, "snprintf");
+                if (!readpassphrase(prompt, pin, sizeof(pin), RPP_ECHO_OFF))
+                        errx(1, "readpassphrase");
+                r = fido_dev_make_cred(dev, cred, pin);
+        }
+
+        explicit_bzero(pin, sizeof(pin));
+        if (r != FIDO_OK)
+                errx(1, "fido_dev_make_cred: %s", fido_strerr(r));
+        print_attcred(out_f, cred);
+
+        fido_dev_close(dev);
+        fido_dev_free(&dev);
+        fido_cred_free(&cred);
+
+        fclose(in_f);
+        fclose(out_f);
+        in_f = NULL;
+        out_f = NULL;
+
+        exit(0);
+}