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-rw-r--r--src/largeblob.c902
1 files changed, 902 insertions, 0 deletions
diff --git a/src/largeblob.c b/src/largeblob.c
new file mode 100644
index 0000000..c1f2e62
--- /dev/null
+++ b/src/largeblob.c
@@ -0,0 +1,902 @@
+/*
+ * Copyright (c) 2020-2022 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 <openssl/sha.h>
+
+#include "fido.h"
+#include "fido/es256.h"
+
+#define LARGEBLOB_DIGEST_LENGTH 16
+#define LARGEBLOB_NONCE_LENGTH 12
+#define LARGEBLOB_TAG_LENGTH 16
+
+typedef struct largeblob {
+ size_t origsiz;
+ fido_blob_t ciphertext;
+ fido_blob_t nonce;
+} largeblob_t;
+
+static largeblob_t *
+largeblob_new(void)
+{
+ return calloc(1, sizeof(largeblob_t));
+}
+
+static void
+largeblob_reset(largeblob_t *blob)
+{
+ fido_blob_reset(&blob->ciphertext);
+ fido_blob_reset(&blob->nonce);
+ blob->origsiz = 0;
+}
+
+static void
+largeblob_free(largeblob_t **blob_ptr)
+{
+ largeblob_t *blob;
+
+ if (blob_ptr == NULL || (blob = *blob_ptr) == NULL)
+ return;
+ largeblob_reset(blob);
+ free(blob);
+ *blob_ptr = NULL;
+}
+
+static int
+largeblob_aad(fido_blob_t *aad, uint64_t size)
+{
+ uint8_t buf[4 + sizeof(uint64_t)];
+
+ buf[0] = 0x62; /* b */
+ buf[1] = 0x6c; /* l */
+ buf[2] = 0x6f; /* o */
+ buf[3] = 0x62; /* b */
+ size = htole64(size);
+ memcpy(&buf[4], &size, sizeof(uint64_t));
+
+ return fido_blob_set(aad, buf, sizeof(buf));
+}
+
+static fido_blob_t *
+largeblob_decrypt(const largeblob_t *blob, const fido_blob_t *key)
+{
+ fido_blob_t *plaintext = NULL, *aad = NULL;
+ int ok = -1;
+
+ if ((plaintext = fido_blob_new()) == NULL ||
+ (aad = fido_blob_new()) == NULL) {
+ fido_log_debug("%s: fido_blob_new", __func__);
+ goto fail;
+ }
+ if (largeblob_aad(aad, blob->origsiz) < 0) {
+ fido_log_debug("%s: largeblob_aad", __func__);
+ goto fail;
+ }
+ if (aes256_gcm_dec(key, &blob->nonce, aad, &blob->ciphertext,
+ plaintext) < 0) {
+ fido_log_debug("%s: aes256_gcm_dec", __func__);
+ goto fail;
+ }
+
+ ok = 0;
+fail:
+ fido_blob_free(&aad);
+
+ if (ok < 0)
+ fido_blob_free(&plaintext);
+
+ return plaintext;
+}
+
+static int
+largeblob_get_nonce(largeblob_t *blob)
+{
+ uint8_t buf[LARGEBLOB_NONCE_LENGTH];
+ int ok = -1;
+
+ if (fido_get_random(buf, sizeof(buf)) < 0) {
+ fido_log_debug("%s: fido_get_random", __func__);
+ goto fail;
+ }
+ if (fido_blob_set(&blob->nonce, buf, sizeof(buf)) < 0) {
+ fido_log_debug("%s: fido_blob_set", __func__);
+ goto fail;
+ }
+
+ ok = 0;
+fail:
+ explicit_bzero(buf, sizeof(buf));
+
+ return ok;
+}
+
+static int
+largeblob_seal(largeblob_t *blob, const fido_blob_t *body,
+ const fido_blob_t *key)
+{
+ fido_blob_t *plaintext = NULL, *aad = NULL;
+ int ok = -1;
+
+ if ((plaintext = fido_blob_new()) == NULL ||
+ (aad = fido_blob_new()) == NULL) {
+ fido_log_debug("%s: fido_blob_new", __func__);
+ goto fail;
+ }
+ if (fido_compress(plaintext, body) != FIDO_OK) {
+ fido_log_debug("%s: fido_compress", __func__);
+ goto fail;
+ }
+ if (largeblob_aad(aad, body->len) < 0) {
+ fido_log_debug("%s: largeblob_aad", __func__);
+ goto fail;
+ }
+ if (largeblob_get_nonce(blob) < 0) {
+ fido_log_debug("%s: largeblob_get_nonce", __func__);
+ goto fail;
+ }
+ if (aes256_gcm_enc(key, &blob->nonce, aad, plaintext,
+ &blob->ciphertext) < 0) {
+ fido_log_debug("%s: aes256_gcm_enc", __func__);
+ goto fail;
+ }
+ blob->origsiz = body->len;
+
+ ok = 0;
+fail:
+ fido_blob_free(&plaintext);
+ fido_blob_free(&aad);
+
+ return ok;
+}
+
+static int
+largeblob_get_tx(fido_dev_t *dev, size_t offset, size_t count, int *ms)
+{
+ fido_blob_t f;
+ cbor_item_t *argv[3];
+ int r;
+
+ memset(argv, 0, sizeof(argv));
+ memset(&f, 0, sizeof(f));
+
+ if ((argv[0] = cbor_build_uint(count)) == NULL ||
+ (argv[2] = cbor_build_uint(offset)) == NULL) {
+ fido_log_debug("%s: cbor encode", __func__);
+ r = FIDO_ERR_INTERNAL;
+ goto fail;
+ }
+ if (cbor_build_frame(CTAP_CBOR_LARGEBLOB, argv, nitems(argv), &f) < 0 ||
+ fido_tx(dev, CTAP_CMD_CBOR, f.ptr, f.len, ms) < 0) {
+ fido_log_debug("%s: fido_tx", __func__);
+ r = FIDO_ERR_TX;
+ goto fail;
+ }
+
+ r = FIDO_OK;
+fail:
+ cbor_vector_free(argv, nitems(argv));
+ free(f.ptr);
+
+ return r;
+}
+
+static int
+parse_largeblob_reply(const cbor_item_t *key, const cbor_item_t *val,
+ void *arg)
+{
+ if (cbor_isa_uint(key) == false ||
+ cbor_int_get_width(key) != CBOR_INT_8 ||
+ cbor_get_uint8(key) != 1) {
+ fido_log_debug("%s: cbor type", __func__);
+ return 0; /* ignore */
+ }
+
+ return fido_blob_decode(val, arg);
+}
+
+static int
+largeblob_get_rx(fido_dev_t *dev, fido_blob_t **chunk, int *ms)
+{
+ unsigned char *msg;
+ int msglen, r;
+
+ *chunk = NULL;
+ if ((msg = malloc(FIDO_MAXMSG)) == NULL) {
+ r = FIDO_ERR_INTERNAL;
+ goto out;
+ }
+ if ((msglen = fido_rx(dev, CTAP_CMD_CBOR, msg, FIDO_MAXMSG, ms)) < 0) {
+ fido_log_debug("%s: fido_rx", __func__);
+ r = FIDO_ERR_RX;
+ goto out;
+ }
+ if ((*chunk = fido_blob_new()) == NULL) {
+ fido_log_debug("%s: fido_blob_new", __func__);
+ r = FIDO_ERR_INTERNAL;
+ goto out;
+ }
+ if ((r = cbor_parse_reply(msg, (size_t)msglen, *chunk,
+ parse_largeblob_reply)) != FIDO_OK) {
+ fido_log_debug("%s: parse_largeblob_reply", __func__);
+ goto out;
+ }
+
+ r = FIDO_OK;
+out:
+ if (r != FIDO_OK)
+ fido_blob_free(chunk);
+
+ freezero(msg, FIDO_MAXMSG);
+
+ return r;
+}
+
+static cbor_item_t *
+largeblob_array_load(const uint8_t *ptr, size_t len)
+{
+ struct cbor_load_result cbor;
+ cbor_item_t *item;
+
+ if (len < LARGEBLOB_DIGEST_LENGTH) {
+ fido_log_debug("%s: len", __func__);
+ return NULL;
+ }
+ len -= LARGEBLOB_DIGEST_LENGTH;
+ if ((item = cbor_load(ptr, len, &cbor)) == NULL) {
+ fido_log_debug("%s: cbor_load", __func__);
+ return NULL;
+ }
+ if (!cbor_isa_array(item) || !cbor_array_is_definite(item)) {
+ fido_log_debug("%s: cbor type", __func__);
+ cbor_decref(&item);
+ return NULL;
+ }
+
+ return item;
+}
+
+static size_t
+get_chunklen(fido_dev_t *dev)
+{
+ uint64_t maxchunklen;
+
+ if ((maxchunklen = fido_dev_maxmsgsize(dev)) > SIZE_MAX)
+ maxchunklen = SIZE_MAX;
+ if (maxchunklen > FIDO_MAXMSG)
+ maxchunklen = FIDO_MAXMSG;
+ maxchunklen = maxchunklen > 64 ? maxchunklen - 64 : 0;
+
+ return (size_t)maxchunklen;
+}
+
+static int
+largeblob_do_decode(const cbor_item_t *key, const cbor_item_t *val, void *arg)
+{
+ largeblob_t *blob = arg;
+ uint64_t origsiz;
+
+ if (cbor_isa_uint(key) == false ||
+ cbor_int_get_width(key) != CBOR_INT_8) {
+ fido_log_debug("%s: cbor type", __func__);
+ return 0; /* ignore */
+ }
+
+ switch (cbor_get_uint8(key)) {
+ case 1: /* ciphertext */
+ if (fido_blob_decode(val, &blob->ciphertext) < 0 ||
+ blob->ciphertext.len < LARGEBLOB_TAG_LENGTH)
+ return -1;
+ return 0;
+ case 2: /* nonce */
+ if (fido_blob_decode(val, &blob->nonce) < 0 ||
+ blob->nonce.len != LARGEBLOB_NONCE_LENGTH)
+ return -1;
+ return 0;
+ case 3: /* origSize */
+ if (!cbor_isa_uint(val) ||
+ (origsiz = cbor_get_int(val)) > SIZE_MAX)
+ return -1;
+ blob->origsiz = (size_t)origsiz;
+ return 0;
+ default: /* ignore */
+ fido_log_debug("%s: cbor type", __func__);
+ return 0;
+ }
+}
+
+static int
+largeblob_decode(largeblob_t *blob, const cbor_item_t *item)
+{
+ if (!cbor_isa_map(item) || !cbor_map_is_definite(item)) {
+ fido_log_debug("%s: cbor type", __func__);
+ return -1;
+ }
+ if (cbor_map_iter(item, blob, largeblob_do_decode) < 0) {
+ fido_log_debug("%s: cbor_map_iter", __func__);
+ return -1;
+ }
+ if (fido_blob_is_empty(&blob->ciphertext) ||
+ fido_blob_is_empty(&blob->nonce) || blob->origsiz == 0) {
+ fido_log_debug("%s: incomplete blob", __func__);
+ return -1;
+ }
+
+ return 0;
+}
+
+static cbor_item_t *
+largeblob_encode(const fido_blob_t *body, const fido_blob_t *key)
+{
+ largeblob_t *blob;
+ cbor_item_t *argv[3], *item = NULL;
+
+ memset(argv, 0, sizeof(argv));
+ if ((blob = largeblob_new()) == NULL ||
+ largeblob_seal(blob, body, key) < 0) {
+ fido_log_debug("%s: largeblob_seal", __func__);
+ goto fail;
+ }
+ if ((argv[0] = fido_blob_encode(&blob->ciphertext)) == NULL ||
+ (argv[1] = fido_blob_encode(&blob->nonce)) == NULL ||
+ (argv[2] = cbor_build_uint(blob->origsiz)) == NULL) {
+ fido_log_debug("%s: cbor encode", __func__);
+ goto fail;
+ }
+ item = cbor_flatten_vector(argv, nitems(argv));
+fail:
+ cbor_vector_free(argv, nitems(argv));
+ largeblob_free(&blob);
+
+ return item;
+}
+
+static int
+largeblob_array_lookup(fido_blob_t *out, size_t *idx, const cbor_item_t *item,
+ const fido_blob_t *key)
+{
+ cbor_item_t **v;
+ fido_blob_t *plaintext = NULL;
+ largeblob_t blob;
+ int r;
+
+ memset(&blob, 0, sizeof(blob));
+ if (idx != NULL)
+ *idx = 0;
+ if ((v = cbor_array_handle(item)) == NULL)
+ return FIDO_ERR_INVALID_ARGUMENT;
+ for (size_t i = 0; i < cbor_array_size(item); i++) {
+ if (largeblob_decode(&blob, v[i]) < 0 ||
+ (plaintext = largeblob_decrypt(&blob, key)) == NULL) {
+ fido_log_debug("%s: largeblob_decode", __func__);
+ largeblob_reset(&blob);
+ continue;
+ }
+ if (idx != NULL)
+ *idx = i;
+ break;
+ }
+ if (plaintext == NULL) {
+ fido_log_debug("%s: not found", __func__);
+ return FIDO_ERR_NOTFOUND;
+ }
+ if (out != NULL)
+ r = fido_uncompress(out, plaintext, blob.origsiz);
+ else
+ r = FIDO_OK;
+
+ fido_blob_free(&plaintext);
+ largeblob_reset(&blob);
+
+ return r;
+}
+
+static int
+largeblob_array_digest(u_char out[LARGEBLOB_DIGEST_LENGTH], const u_char *data,
+ size_t len)
+{
+ u_char dgst[SHA256_DIGEST_LENGTH];
+
+ if (data == NULL || len == 0)
+ return -1;
+ if (SHA256(data, len, dgst) != dgst)
+ return -1;
+ memcpy(out, dgst, LARGEBLOB_DIGEST_LENGTH);
+
+ return 0;
+}
+
+static int
+largeblob_array_check(const fido_blob_t *array)
+{
+ u_char expected_hash[LARGEBLOB_DIGEST_LENGTH];
+ size_t body_len;
+
+ fido_log_xxd(array->ptr, array->len, __func__);
+ if (array->len < sizeof(expected_hash)) {
+ fido_log_debug("%s: len %zu", __func__, array->len);
+ return -1;
+ }
+ body_len = array->len - sizeof(expected_hash);
+ if (largeblob_array_digest(expected_hash, array->ptr, body_len) < 0) {
+ fido_log_debug("%s: largeblob_array_digest", __func__);
+ return -1;
+ }
+
+ return timingsafe_bcmp(expected_hash, array->ptr + body_len,
+ sizeof(expected_hash));
+}
+
+static int
+largeblob_get_array(fido_dev_t *dev, cbor_item_t **item, int *ms)
+{
+ fido_blob_t *array, *chunk = NULL;
+ size_t n;
+ int r;
+
+ *item = NULL;
+ if ((n = get_chunklen(dev)) == 0)
+ return FIDO_ERR_INVALID_ARGUMENT;
+ if ((array = fido_blob_new()) == NULL)
+ return FIDO_ERR_INTERNAL;
+ do {
+ fido_blob_free(&chunk);
+ if ((r = largeblob_get_tx(dev, array->len, n, ms)) != FIDO_OK ||
+ (r = largeblob_get_rx(dev, &chunk, ms)) != FIDO_OK) {
+ fido_log_debug("%s: largeblob_get_wait %zu/%zu",
+ __func__, array->len, n);
+ goto fail;
+ }
+ if (fido_blob_append(array, chunk->ptr, chunk->len) < 0) {
+ fido_log_debug("%s: fido_blob_append", __func__);
+ r = FIDO_ERR_INTERNAL;
+ goto fail;
+ }
+ } while (chunk->len == n);
+
+ if (largeblob_array_check(array) != 0)
+ *item = cbor_new_definite_array(0); /* per spec */
+ else
+ *item = largeblob_array_load(array->ptr, array->len);
+ if (*item == NULL)
+ r = FIDO_ERR_INTERNAL;
+ else
+ r = FIDO_OK;
+fail:
+ fido_blob_free(&array);
+ fido_blob_free(&chunk);
+
+ return r;
+}
+
+static int
+prepare_hmac(size_t offset, const u_char *data, size_t len, fido_blob_t *hmac)
+{
+ uint8_t buf[32 + 2 + sizeof(uint32_t) + SHA256_DIGEST_LENGTH];
+ uint32_t u32_offset;
+
+ if (data == NULL || len == 0) {
+ fido_log_debug("%s: invalid data=%p, len=%zu", __func__,
+ (const void *)data, len);
+ return -1;
+ }
+ if (offset > UINT32_MAX) {
+ fido_log_debug("%s: invalid offset=%zu", __func__, offset);
+ return -1;
+ }
+
+ memset(buf, 0xff, 32);
+ buf[32] = CTAP_CBOR_LARGEBLOB;
+ buf[33] = 0x00;
+ u32_offset = htole32((uint32_t)offset);
+ memcpy(&buf[34], &u32_offset, sizeof(uint32_t));
+ if (SHA256(data, len, &buf[38]) != &buf[38]) {
+ fido_log_debug("%s: SHA256", __func__);
+ return -1;
+ }
+
+ return fido_blob_set(hmac, buf, sizeof(buf));
+}
+
+static int
+largeblob_set_tx(fido_dev_t *dev, const fido_blob_t *token, const u_char *chunk,
+ size_t chunk_len, size_t offset, size_t totalsiz, int *ms)
+{
+ fido_blob_t *hmac = NULL, f;
+ cbor_item_t *argv[6];
+ int r;
+
+ memset(argv, 0, sizeof(argv));
+ memset(&f, 0, sizeof(f));
+
+ if ((argv[1] = cbor_build_bytestring(chunk, chunk_len)) == NULL ||
+ (argv[2] = cbor_build_uint(offset)) == NULL ||
+ (offset == 0 && (argv[3] = cbor_build_uint(totalsiz)) == NULL)) {
+ fido_log_debug("%s: cbor encode", __func__);
+ r = FIDO_ERR_INTERNAL;
+ goto fail;
+ }
+ if (token != NULL) {
+ if ((hmac = fido_blob_new()) == NULL ||
+ prepare_hmac(offset, chunk, chunk_len, hmac) < 0 ||
+ (argv[4] = cbor_encode_pin_auth(dev, token, hmac)) == NULL ||
+ (argv[5] = cbor_encode_pin_opt(dev)) == NULL) {
+ fido_log_debug("%s: cbor_encode_pin_auth", __func__);
+ r = FIDO_ERR_INTERNAL;
+ goto fail;
+ }
+ }
+ if (cbor_build_frame(CTAP_CBOR_LARGEBLOB, argv, nitems(argv), &f) < 0 ||
+ fido_tx(dev, CTAP_CMD_CBOR, f.ptr, f.len, ms) < 0) {
+ fido_log_debug("%s: fido_tx", __func__);
+ r = FIDO_ERR_TX;
+ goto fail;
+ }
+
+ r = FIDO_OK;
+fail:
+ cbor_vector_free(argv, nitems(argv));
+ fido_blob_free(&hmac);
+ free(f.ptr);
+
+ return r;
+}
+
+static int
+largeblob_get_uv_token(fido_dev_t *dev, const char *pin, fido_blob_t **token,
+ int *ms)
+{
+ es256_pk_t *pk = NULL;
+ fido_blob_t *ecdh = NULL;
+ int r;
+
+ if ((*token = fido_blob_new()) == NULL)
+ return FIDO_ERR_INTERNAL;
+ if ((r = fido_do_ecdh(dev, &pk, &ecdh, ms)) != FIDO_OK) {
+ fido_log_debug("%s: fido_do_ecdh", __func__);
+ goto fail;
+ }
+ if ((r = fido_dev_get_uv_token(dev, CTAP_CBOR_LARGEBLOB, pin, ecdh, pk,
+ NULL, *token, ms)) != FIDO_OK) {
+ fido_log_debug("%s: fido_dev_get_uv_token", __func__);
+ goto fail;
+ }
+
+ r = FIDO_OK;
+fail:
+ if (r != FIDO_OK)
+ fido_blob_free(token);
+
+ fido_blob_free(&ecdh);
+ es256_pk_free(&pk);
+
+ return r;
+}
+
+static int
+largeblob_set_array(fido_dev_t *dev, const cbor_item_t *item, const char *pin,
+ int *ms)
+{
+ unsigned char dgst[SHA256_DIGEST_LENGTH];
+ fido_blob_t cbor, *token = NULL;
+ size_t chunklen, maxchunklen, totalsize;
+ int r;
+
+ memset(&cbor, 0, sizeof(cbor));
+
+ if ((maxchunklen = get_chunklen(dev)) == 0) {
+ fido_log_debug("%s: maxchunklen=%zu", __func__, maxchunklen);
+ r = FIDO_ERR_INVALID_ARGUMENT;
+ goto fail;
+ }
+ if (!cbor_isa_array(item) || !cbor_array_is_definite(item)) {
+ fido_log_debug("%s: cbor type", __func__);
+ r = FIDO_ERR_INVALID_ARGUMENT;
+ goto fail;
+ }
+ if ((fido_blob_serialise(&cbor, item)) < 0) {
+ fido_log_debug("%s: fido_blob_serialise", __func__);
+ r = FIDO_ERR_INTERNAL;
+ goto fail;
+ }
+ if (cbor.len > SIZE_MAX - sizeof(dgst)) {
+ fido_log_debug("%s: cbor.len=%zu", __func__, cbor.len);
+ r = FIDO_ERR_INVALID_ARGUMENT;
+ goto fail;
+ }
+ if (SHA256(cbor.ptr, cbor.len, dgst) != dgst) {
+ fido_log_debug("%s: SHA256", __func__);
+ r = FIDO_ERR_INTERNAL;
+ goto fail;
+ }
+ totalsize = cbor.len + sizeof(dgst) - 16; /* the first 16 bytes only */
+ if (pin != NULL || fido_dev_supports_permissions(dev)) {
+ if ((r = largeblob_get_uv_token(dev, pin, &token,
+ ms)) != FIDO_OK) {
+ fido_log_debug("%s: largeblob_get_uv_token", __func__);
+ goto fail;
+ }
+ }
+ for (size_t offset = 0; offset < cbor.len; offset += chunklen) {
+ if ((chunklen = cbor.len - offset) > maxchunklen)
+ chunklen = maxchunklen;
+ if ((r = largeblob_set_tx(dev, token, cbor.ptr + offset,
+ chunklen, offset, totalsize, ms)) != FIDO_OK ||
+ (r = fido_rx_cbor_status(dev, ms)) != FIDO_OK) {
+ fido_log_debug("%s: body", __func__);
+ goto fail;
+ }
+ }
+ if ((r = largeblob_set_tx(dev, token, dgst, sizeof(dgst) - 16, cbor.len,
+ totalsize, ms)) != FIDO_OK ||
+ (r = fido_rx_cbor_status(dev, ms)) != FIDO_OK) {
+ fido_log_debug("%s: dgst", __func__);
+ goto fail;
+ }
+
+ r = FIDO_OK;
+fail:
+ fido_blob_free(&token);
+ fido_blob_reset(&cbor);
+
+ return r;
+}
+
+static int
+largeblob_add(fido_dev_t *dev, const fido_blob_t *key, cbor_item_t *item,
+ const char *pin, int *ms)
+{
+ cbor_item_t *array = NULL;
+ size_t idx;
+ int r;
+
+ if ((r = largeblob_get_array(dev, &array, ms)) != FIDO_OK) {
+ fido_log_debug("%s: largeblob_get_array", __func__);
+ goto fail;
+ }
+
+ switch (r = largeblob_array_lookup(NULL, &idx, array, key)) {
+ case FIDO_OK:
+ if (!cbor_array_replace(array, idx, item)) {
+ r = FIDO_ERR_INTERNAL;
+ goto fail;
+ }
+ break;
+ case FIDO_ERR_NOTFOUND:
+ if (cbor_array_append(&array, item) < 0) {
+ r = FIDO_ERR_INTERNAL;
+ goto fail;
+ }
+ break;
+ default:
+ fido_log_debug("%s: largeblob_array_lookup", __func__);
+ goto fail;
+ }
+
+ if ((r = largeblob_set_array(dev, array, pin, ms)) != FIDO_OK) {
+ fido_log_debug("%s: largeblob_set_array", __func__);
+ goto fail;
+ }
+
+ r = FIDO_OK;
+fail:
+ if (array != NULL)
+ cbor_decref(&array);
+
+ return r;
+}
+
+static int
+largeblob_drop(fido_dev_t *dev, const fido_blob_t *key, const char *pin,
+ int *ms)
+{
+ cbor_item_t *array = NULL;
+ size_t idx;
+ int r;
+
+ if ((r = largeblob_get_array(dev, &array, ms)) != FIDO_OK) {
+ fido_log_debug("%s: largeblob_get_array", __func__);
+ goto fail;
+ }
+ if ((r = largeblob_array_lookup(NULL, &idx, array, key)) != FIDO_OK) {
+ fido_log_debug("%s: largeblob_array_lookup", __func__);
+ goto fail;
+ }
+ if (cbor_array_drop(&array, idx) < 0) {
+ fido_log_debug("%s: cbor_array_drop", __func__);
+ r = FIDO_ERR_INTERNAL;
+ goto fail;
+ }
+ if ((r = largeblob_set_array(dev, array, pin, ms)) != FIDO_OK) {
+ fido_log_debug("%s: largeblob_set_array", __func__);
+ goto fail;
+ }
+
+ r = FIDO_OK;
+fail:
+ if (array != NULL)
+ cbor_decref(&array);
+
+ return r;
+}
+
+int
+fido_dev_largeblob_get(fido_dev_t *dev, const unsigned char *key_ptr,
+ size_t key_len, unsigned char **blob_ptr, size_t *blob_len)
+{
+ cbor_item_t *item = NULL;
+ fido_blob_t key, body;
+ int ms = dev->timeout_ms;
+ int r;
+
+ memset(&key, 0, sizeof(key));
+ memset(&body, 0, sizeof(body));
+
+ if (key_len != 32) {
+ fido_log_debug("%s: invalid key len %zu", __func__, key_len);
+ return FIDO_ERR_INVALID_ARGUMENT;
+ }
+ if (blob_ptr == NULL || blob_len == NULL) {
+ fido_log_debug("%s: invalid blob_ptr=%p, blob_len=%p", __func__,
+ (const void *)blob_ptr, (const void *)blob_len);
+ return FIDO_ERR_INVALID_ARGUMENT;
+ }
+ *blob_ptr = NULL;
+ *blob_len = 0;
+ if (fido_blob_set(&key, key_ptr, key_len) < 0) {
+ fido_log_debug("%s: fido_blob_set", __func__);
+ return FIDO_ERR_INTERNAL;
+ }
+ if ((r = largeblob_get_array(dev, &item, &ms)) != FIDO_OK) {
+ fido_log_debug("%s: largeblob_get_array", __func__);
+ goto fail;
+ }
+ if ((r = largeblob_array_lookup(&body, NULL, item, &key)) != FIDO_OK)
+ fido_log_debug("%s: largeblob_array_lookup", __func__);
+ else {
+ *blob_ptr = body.ptr;
+ *blob_len = body.len;
+ }
+fail:
+ if (item != NULL)
+ cbor_decref(&item);
+
+ fido_blob_reset(&key);
+
+ return r;
+}
+
+int
+fido_dev_largeblob_set(fido_dev_t *dev, const unsigned char *key_ptr,
+ size_t key_len, const unsigned char *blob_ptr, size_t blob_len,
+ const char *pin)
+{
+ cbor_item_t *item = NULL;
+ fido_blob_t key, body;
+ int ms = dev->timeout_ms;
+ int r;
+
+ memset(&key, 0, sizeof(key));
+ memset(&body, 0, sizeof(body));
+
+ if (key_len != 32) {
+ fido_log_debug("%s: invalid key len %zu", __func__, key_len);
+ return FIDO_ERR_INVALID_ARGUMENT;
+ }
+ if (blob_ptr == NULL || blob_len == 0) {
+ fido_log_debug("%s: invalid blob_ptr=%p, blob_len=%zu", __func__,
+ (const void *)blob_ptr, blob_len);
+ return FIDO_ERR_INVALID_ARGUMENT;
+ }
+ if (fido_blob_set(&key, key_ptr, key_len) < 0 ||
+ fido_blob_set(&body, blob_ptr, blob_len) < 0) {
+ fido_log_debug("%s: fido_blob_set", __func__);
+ r = FIDO_ERR_INTERNAL;
+ goto fail;
+ }
+ if ((item = largeblob_encode(&body, &key)) == NULL) {
+ fido_log_debug("%s: largeblob_encode", __func__);
+ r = FIDO_ERR_INTERNAL;
+ goto fail;
+ }
+ if ((r = largeblob_add(dev, &key, item, pin, &ms)) != FIDO_OK)
+ fido_log_debug("%s: largeblob_add", __func__);
+fail:
+ if (item != NULL)
+ cbor_decref(&item);
+
+ fido_blob_reset(&key);
+ fido_blob_reset(&body);
+
+ return r;
+}
+
+int
+fido_dev_largeblob_remove(fido_dev_t *dev, const unsigned char *key_ptr,
+ size_t key_len, const char *pin)
+{
+ fido_blob_t key;
+ int ms = dev->timeout_ms;
+ int r;
+
+ memset(&key, 0, sizeof(key));
+
+ if (key_len != 32) {
+ fido_log_debug("%s: invalid key len %zu", __func__, key_len);
+ return FIDO_ERR_INVALID_ARGUMENT;
+ }
+ if (fido_blob_set(&key, key_ptr, key_len) < 0) {
+ fido_log_debug("%s: fido_blob_set", __func__);
+ return FIDO_ERR_INTERNAL;
+ }
+ if ((r = largeblob_drop(dev, &key, pin, &ms)) != FIDO_OK)
+ fido_log_debug("%s: largeblob_drop", __func__);
+
+ fido_blob_reset(&key);
+
+ return r;
+}
+
+int
+fido_dev_largeblob_get_array(fido_dev_t *dev, unsigned char **cbor_ptr,
+ size_t *cbor_len)
+{
+ cbor_item_t *item = NULL;
+ fido_blob_t cbor;
+ int ms = dev->timeout_ms;
+ int r;
+
+ memset(&cbor, 0, sizeof(cbor));
+
+ if (cbor_ptr == NULL || cbor_len == NULL) {
+ fido_log_debug("%s: invalid cbor_ptr=%p, cbor_len=%p", __func__,
+ (const void *)cbor_ptr, (const void *)cbor_len);
+ return FIDO_ERR_INVALID_ARGUMENT;
+ }
+ *cbor_ptr = NULL;
+ *cbor_len = 0;
+ if ((r = largeblob_get_array(dev, &item, &ms)) != FIDO_OK) {
+ fido_log_debug("%s: largeblob_get_array", __func__);
+ return r;
+ }
+ if (fido_blob_serialise(&cbor, item) < 0) {
+ fido_log_debug("%s: fido_blob_serialise", __func__);
+ r = FIDO_ERR_INTERNAL;
+ } else {
+ *cbor_ptr = cbor.ptr;
+ *cbor_len = cbor.len;
+ }
+
+ cbor_decref(&item);
+
+ return r;
+}
+
+int
+fido_dev_largeblob_set_array(fido_dev_t *dev, const unsigned char *cbor_ptr,
+ size_t cbor_len, const char *pin)
+{
+ cbor_item_t *item = NULL;
+ struct cbor_load_result cbor_result;
+ int ms = dev->timeout_ms;
+ int r;
+
+ if (cbor_ptr == NULL || cbor_len == 0) {
+ fido_log_debug("%s: invalid cbor_ptr=%p, cbor_len=%zu", __func__,
+ (const void *)cbor_ptr, cbor_len);
+ return FIDO_ERR_INVALID_ARGUMENT;
+ }
+ if ((item = cbor_load(cbor_ptr, cbor_len, &cbor_result)) == NULL) {
+ fido_log_debug("%s: cbor_load", __func__);
+ return FIDO_ERR_INVALID_ARGUMENT;
+ }
+ if ((r = largeblob_set_array(dev, item, pin, &ms)) != FIDO_OK)
+ fido_log_debug("%s: largeblob_set_array", __func__);
+
+ cbor_decref(&item);
+
+ return r;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-10 08:01:57 +0000