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-rw-r--r--examples/util.c444
1 files changed, 444 insertions, 0 deletions
diff --git a/examples/util.c b/examples/util.c
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index 0000000..0c0c77a
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+++ b/examples/util.c
@@ -0,0 +1,444 @@
+/*
+ * 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 <sys/types.h>
+#include <sys/stat.h>
+
+#include <openssl/ec.h>
+#include <openssl/evp.h>
+#include <openssl/pem.h>
+
+#include <fido.h>
+#include <fido/es256.h>
+#include <fido/es384.h>
+#include <fido/rs256.h>
+#include <fido/eddsa.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <string.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#ifdef _MSC_VER
+#include "../openbsd-compat/posix_win.h"
+#endif
+#include "../openbsd-compat/openbsd-compat.h"
+#include "extern.h"
+
+int
+base10(const char *str, long long *ll)
+{
+ char *ep;
+
+ *ll = strtoll(str, &ep, 10);
+ if (str == ep || *ep != '\0')
+ return (-1);
+ else if (*ll == LLONG_MIN && errno == ERANGE)
+ return (-1);
+ else if (*ll == LLONG_MAX && errno == ERANGE)
+ return (-1);
+
+ return (0);
+}
+
+int
+write_blob(const char *path, const unsigned char *ptr, size_t len)
+{
+ int fd, ok = -1;
+ ssize_t n;
+
+ if ((fd = open(path, O_WRONLY | O_CREAT, 0600)) < 0) {
+ warn("open %s", path);
+ goto fail;
+ }
+
+ if ((n = write(fd, ptr, len)) < 0) {
+ warn("write");
+ goto fail;
+ }
+ if ((size_t)n != len) {
+ warnx("write");
+ goto fail;
+ }
+
+ ok = 0;
+fail:
+ if (fd != -1) {
+ close(fd);
+ }
+
+ return (ok);
+}
+
+int
+read_blob(const char *path, unsigned char **ptr, size_t *len)
+{
+ int fd, ok = -1;
+ struct stat st;
+ ssize_t n;
+
+ *ptr = NULL;
+ *len = 0;
+
+ if ((fd = open(path, O_RDONLY)) < 0) {
+ warn("open %s", path);
+ goto fail;
+ }
+ if (fstat(fd, &st) < 0) {
+ warn("stat %s", path);
+ goto fail;
+ }
+ if (st.st_size < 0) {
+ warnx("stat %s: invalid size", path);
+ goto fail;
+ }
+ *len = (size_t)st.st_size;
+ if ((*ptr = malloc(*len)) == NULL) {
+ warn("malloc");
+ goto fail;
+ }
+ if ((n = read(fd, *ptr, *len)) < 0) {
+ warn("read");
+ goto fail;
+ }
+ if ((size_t)n != *len) {
+ warnx("read");
+ goto fail;
+ }
+
+ ok = 0;
+fail:
+ if (fd != -1) {
+ close(fd);
+ }
+ if (ok < 0) {
+ free(*ptr);
+ *ptr = NULL;
+ *len = 0;
+ }
+
+ return (ok);
+}
+
+EC_KEY *
+read_ec_pubkey(const char *path)
+{
+ FILE *fp = NULL;
+ EVP_PKEY *pkey = NULL;
+ EC_KEY *ec = NULL;
+
+ if ((fp = fopen(path, "r")) == NULL) {
+ warn("fopen");
+ goto fail;
+ }
+
+ if ((pkey = PEM_read_PUBKEY(fp, NULL, NULL, NULL)) == NULL) {
+ warnx("PEM_read_PUBKEY");
+ goto fail;
+ }
+ if ((ec = EVP_PKEY_get1_EC_KEY(pkey)) == NULL) {
+ warnx("EVP_PKEY_get1_EC_KEY");
+ goto fail;
+ }
+
+fail:
+ if (fp != NULL) {
+ fclose(fp);
+ }
+ if (pkey != NULL) {
+ EVP_PKEY_free(pkey);
+ }
+
+ return (ec);
+}
+
+int
+write_es256_pubkey(const char *path, const void *ptr, size_t len)
+{
+ FILE *fp = NULL;
+ EVP_PKEY *pkey = NULL;
+ es256_pk_t *pk = NULL;
+ int fd = -1;
+ int ok = -1;
+
+ if ((pk = es256_pk_new()) == NULL) {
+ warnx("es256_pk_new");
+ goto fail;
+ }
+
+ if (es256_pk_from_ptr(pk, ptr, len) != FIDO_OK) {
+ warnx("es256_pk_from_ptr");
+ goto fail;
+ }
+
+ if ((fd = open(path, O_WRONLY | O_CREAT, 0644)) < 0) {
+ warn("open %s", path);
+ goto fail;
+ }
+
+ if ((fp = fdopen(fd, "w")) == NULL) {
+ warn("fdopen");
+ goto fail;
+ }
+ fd = -1; /* owned by fp now */
+
+ if ((pkey = es256_pk_to_EVP_PKEY(pk)) == NULL) {
+ warnx("es256_pk_to_EVP_PKEY");
+ goto fail;
+ }
+
+ if (PEM_write_PUBKEY(fp, pkey) == 0) {
+ warnx("PEM_write_PUBKEY");
+ goto fail;
+ }
+
+ ok = 0;
+fail:
+ es256_pk_free(&pk);
+
+ if (fp != NULL) {
+ fclose(fp);
+ }
+ if (fd != -1) {
+ close(fd);
+ }
+ if (pkey != NULL) {
+ EVP_PKEY_free(pkey);
+ }
+
+ return (ok);
+}
+
+int
+write_es384_pubkey(const char *path, const void *ptr, size_t len)
+{
+ FILE *fp = NULL;
+ EVP_PKEY *pkey = NULL;
+ es384_pk_t *pk = NULL;
+ int fd = -1;
+ int ok = -1;
+
+ if ((pk = es384_pk_new()) == NULL) {
+ warnx("es384_pk_new");
+ goto fail;
+ }
+
+ if (es384_pk_from_ptr(pk, ptr, len) != FIDO_OK) {
+ warnx("es384_pk_from_ptr");
+ goto fail;
+ }
+
+ if ((fd = open(path, O_WRONLY | O_CREAT, 0644)) < 0) {
+ warn("open %s", path);
+ goto fail;
+ }
+
+ if ((fp = fdopen(fd, "w")) == NULL) {
+ warn("fdopen");
+ goto fail;
+ }
+ fd = -1; /* owned by fp now */
+
+ if ((pkey = es384_pk_to_EVP_PKEY(pk)) == NULL) {
+ warnx("es384_pk_to_EVP_PKEY");
+ goto fail;
+ }
+
+ if (PEM_write_PUBKEY(fp, pkey) == 0) {
+ warnx("PEM_write_PUBKEY");
+ goto fail;
+ }
+
+ ok = 0;
+fail:
+ es384_pk_free(&pk);
+
+ if (fp != NULL) {
+ fclose(fp);
+ }
+ if (fd != -1) {
+ close(fd);
+ }
+ if (pkey != NULL) {
+ EVP_PKEY_free(pkey);
+ }
+
+ return (ok);
+}
+
+RSA *
+read_rsa_pubkey(const char *path)
+{
+ FILE *fp = NULL;
+ EVP_PKEY *pkey = NULL;
+ RSA *rsa = NULL;
+
+ if ((fp = fopen(path, "r")) == NULL) {
+ warn("fopen");
+ goto fail;
+ }
+
+ if ((pkey = PEM_read_PUBKEY(fp, NULL, NULL, NULL)) == NULL) {
+ warnx("PEM_read_PUBKEY");
+ goto fail;
+ }
+ if ((rsa = EVP_PKEY_get1_RSA(pkey)) == NULL) {
+ warnx("EVP_PKEY_get1_RSA");
+ goto fail;
+ }
+
+fail:
+ if (fp != NULL) {
+ fclose(fp);
+ }
+ if (pkey != NULL) {
+ EVP_PKEY_free(pkey);
+ }
+
+ return (rsa);
+}
+
+int
+write_rs256_pubkey(const char *path, const void *ptr, size_t len)
+{
+ FILE *fp = NULL;
+ EVP_PKEY *pkey = NULL;
+ rs256_pk_t *pk = NULL;
+ int fd = -1;
+ int ok = -1;
+
+ if ((pk = rs256_pk_new()) == NULL) {
+ warnx("rs256_pk_new");
+ goto fail;
+ }
+
+ if (rs256_pk_from_ptr(pk, ptr, len) != FIDO_OK) {
+ warnx("rs256_pk_from_ptr");
+ goto fail;
+ }
+
+ if ((fd = open(path, O_WRONLY | O_CREAT, 0644)) < 0) {
+ warn("open %s", path);
+ goto fail;
+ }
+
+ if ((fp = fdopen(fd, "w")) == NULL) {
+ warn("fdopen");
+ goto fail;
+ }
+ fd = -1; /* owned by fp now */
+
+ if ((pkey = rs256_pk_to_EVP_PKEY(pk)) == NULL) {
+ warnx("rs256_pk_to_EVP_PKEY");
+ goto fail;
+ }
+
+ if (PEM_write_PUBKEY(fp, pkey) == 0) {
+ warnx("PEM_write_PUBKEY");
+ goto fail;
+ }
+
+ ok = 0;
+fail:
+ rs256_pk_free(&pk);
+
+ if (fp != NULL) {
+ fclose(fp);
+ }
+ if (fd != -1) {
+ close(fd);
+ }
+ if (pkey != NULL) {
+ EVP_PKEY_free(pkey);
+ }
+
+ return (ok);
+}
+
+EVP_PKEY *
+read_eddsa_pubkey(const char *path)
+{
+ FILE *fp = NULL;
+ EVP_PKEY *pkey = NULL;
+
+ if ((fp = fopen(path, "r")) == NULL) {
+ warn("fopen");
+ goto fail;
+ }
+
+ if ((pkey = PEM_read_PUBKEY(fp, NULL, NULL, NULL)) == NULL) {
+ warnx("PEM_read_PUBKEY");
+ goto fail;
+ }
+
+fail:
+ if (fp) {
+ fclose(fp);
+ }
+
+ return (pkey);
+}
+
+int
+write_eddsa_pubkey(const char *path, const void *ptr, size_t len)
+{
+ FILE *fp = NULL;
+ EVP_PKEY *pkey = NULL;
+ eddsa_pk_t *pk = NULL;
+ int fd = -1;
+ int ok = -1;
+
+ if ((pk = eddsa_pk_new()) == NULL) {
+ warnx("eddsa_pk_new");
+ goto fail;
+ }
+
+ if (eddsa_pk_from_ptr(pk, ptr, len) != FIDO_OK) {
+ warnx("eddsa_pk_from_ptr");
+ goto fail;
+ }
+
+ if ((fd = open(path, O_WRONLY | O_CREAT, 0644)) < 0) {
+ warn("open %s", path);
+ goto fail;
+ }
+
+ if ((fp = fdopen(fd, "w")) == NULL) {
+ warn("fdopen");
+ goto fail;
+ }
+ fd = -1; /* owned by fp now */
+
+ if ((pkey = eddsa_pk_to_EVP_PKEY(pk)) == NULL) {
+ warnx("eddsa_pk_to_EVP_PKEY");
+ goto fail;
+ }
+
+ if (PEM_write_PUBKEY(fp, pkey) == 0) {
+ warnx("PEM_write_PUBKEY");
+ goto fail;
+ }
+
+ ok = 0;
+fail:
+ eddsa_pk_free(&pk);
+
+ if (fp != NULL) {
+ fclose(fp);
+ }
+ if (fd != -1) {
+ close(fd);
+ }
+ if (pkey != NULL) {
+ EVP_PKEY_free(pkey);
+ }
+
+ return (ok);
+}
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