Adding upstream version 1.12.0.upstream/1.12.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 825 insertions, 0 deletions

diff --git a/src/credman.c b/src/credman.c
new file mode 100644
index 0000000..c364242
--- /dev/null
+++ b/src/credman.c
@@ -0,0 +1,825 @@
+/*
+ * Copyright (c) 2019-2022 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/credman.h"
+#include "fido/es256.h"
+
+#define CMD_CRED_METADATA	0x01
+#define CMD_RP_BEGIN		0x02
+#define CMD_RP_NEXT		0x03
+#define CMD_RK_BEGIN		0x04
+#define CMD_RK_NEXT		0x05
+#define CMD_DELETE_CRED		0x06
+#define CMD_UPDATE_CRED		0x07
+
+static int
+credman_grow_array(void **ptr, size_t *n_alloc, const size_t *n_rx, size_t n,
+    size_t size)
+{
+	void *new_ptr;
+
+#ifdef FIDO_FUZZ
+	if (n > UINT8_MAX) {
+		fido_log_debug("%s: n > UINT8_MAX", __func__);
+		return (-1);
+	}
+#endif
+
+	if (n < *n_alloc)
+		return (0);
+
+	/* sanity check */
+	if (*n_rx > 0 || *n_rx > *n_alloc || n < *n_alloc) {
+		fido_log_debug("%s: n=%zu, n_rx=%zu, n_alloc=%zu", __func__, n,
+		    *n_rx, *n_alloc);
+		return (-1);
+	}
+
+	if ((new_ptr = recallocarray(*ptr, *n_alloc, n, size)) == NULL)
+		return (-1);
+
+	*ptr = new_ptr;
+	*n_alloc = n;
+
+	return (0);
+}
+
+static int
+credman_prepare_hmac(uint8_t cmd, const void *body, cbor_item_t **param,
+    fido_blob_t *hmac_data)
+{
+	cbor_item_t *param_cbor[3];
+	const fido_cred_t *cred;
+	size_t n;
+	int ok = -1;
+
+	memset(&param_cbor, 0, sizeof(param_cbor));
+
+	if (body == NULL)
+		return (fido_blob_set(hmac_data, &cmd, sizeof(cmd)));
+
+	switch (cmd) {
+	case CMD_RK_BEGIN:
+		n = 1;
+		if ((param_cbor[0] = fido_blob_encode(body)) == NULL) {
+			fido_log_debug("%s: cbor encode", __func__);
+			goto fail;
+		}
+		break;
+	case CMD_DELETE_CRED:
+		n = 2;
+		if ((param_cbor[1] = cbor_encode_pubkey(body)) == NULL) {
+			fido_log_debug("%s: cbor encode", __func__);
+			goto fail;
+		}
+		break;
+	case CMD_UPDATE_CRED:
+		n = 3;
+		cred = body;
+		param_cbor[1] = cbor_encode_pubkey(&cred->attcred.id);
+		param_cbor[2] = cbor_encode_user_entity(&cred->user);
+		if (param_cbor[1] == NULL || param_cbor[2] == NULL) {
+			fido_log_debug("%s: cbor encode", __func__);
+			goto fail;
+		}
+		break;
+	default:
+		fido_log_debug("%s: unknown cmd=0x%02x", __func__, cmd);
+		return (-1);
+	}
+
+	if ((*param = cbor_flatten_vector(param_cbor, n)) == NULL) {
+		fido_log_debug("%s: cbor_flatten_vector", __func__);
+		goto fail;
+	}
+	if (cbor_build_frame(cmd, param_cbor, n, hmac_data) < 0) {
+		fido_log_debug("%s: cbor_build_frame", __func__);
+		goto fail;
+	}
+
+	ok = 0;
+fail:
+	cbor_vector_free(param_cbor, nitems(param_cbor));
+
+	return (ok);
+}
+
+static int
+credman_tx(fido_dev_t *dev, uint8_t subcmd, const void *param, const char *pin,
+    const char *rp_id, fido_opt_t uv, int *ms)
+{
+	fido_blob_t	 f;
+	fido_blob_t	*ecdh = NULL;
+	fido_blob_t	 hmac;
+	es256_pk_t	*pk = NULL;
+	cbor_item_t	*argv[4];
+	const uint8_t	 cmd = CTAP_CBOR_CRED_MGMT_PRE;
+	int		 r = FIDO_ERR_INTERNAL;
+
+	memset(&f, 0, sizeof(f));
+	memset(&hmac, 0, sizeof(hmac));
+	memset(&argv, 0, sizeof(argv));
+
+	if (fido_dev_is_fido2(dev) == false) {
+		fido_log_debug("%s: fido_dev_is_fido2", __func__);
+		r = FIDO_ERR_INVALID_COMMAND;
+		goto fail;
+	}
+
+	/* subCommand */
+	if ((argv[0] = cbor_build_uint8(subcmd)) == NULL) {
+		fido_log_debug("%s: cbor encode", __func__);
+		goto fail;
+	}
+
+	/* pinProtocol, pinAuth */
+	if (pin != NULL || uv == FIDO_OPT_TRUE) {
+		if (credman_prepare_hmac(subcmd, param, &argv[1], &hmac) < 0) {
+			fido_log_debug("%s: credman_prepare_hmac", __func__);
+			goto fail;
+		}
+		if ((r = fido_do_ecdh(dev, &pk, &ecdh, ms)) != FIDO_OK) {
+			fido_log_debug("%s: fido_do_ecdh", __func__);
+			goto fail;
+		}
+		if ((r = cbor_add_uv_params(dev, cmd, &hmac, pk, ecdh, pin,
+		    rp_id, &argv[3], &argv[2], ms)) != FIDO_OK) {
+			fido_log_debug("%s: cbor_add_uv_params", __func__);
+			goto fail;
+		}
+	}
+
+	/* framing and transmission */
+	if (cbor_build_frame(cmd, 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:
+	es256_pk_free(&pk);
+	fido_blob_free(&ecdh);
+	cbor_vector_free(argv, nitems(argv));
+	free(f.ptr);
+	free(hmac.ptr);
+
+	return (r);
+}
+
+static int
+credman_parse_metadata(const cbor_item_t *key, const cbor_item_t *val,
+    void *arg)
+{
+	fido_credman_metadata_t *metadata = arg;
+
+	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:
+		return (cbor_decode_uint64(val, &metadata->rk_existing));
+	case 2:
+		return (cbor_decode_uint64(val, &metadata->rk_remaining));
+	default:
+		fido_log_debug("%s: cbor type", __func__);
+		return (0); /* ignore */
+	}
+}
+
+static int
+credman_rx_metadata(fido_dev_t *dev, fido_credman_metadata_t *metadata, int *ms)
+{
+	unsigned char	*msg;
+	int		 msglen;
+	int		 r;
+
+	memset(metadata, 0, sizeof(*metadata));
+
+	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 ((r = cbor_parse_reply(msg, (size_t)msglen, metadata,
+	    credman_parse_metadata)) != FIDO_OK) {
+		fido_log_debug("%s: credman_parse_metadata", __func__);
+		goto out;
+	}
+
+	r = FIDO_OK;
+out:
+	freezero(msg, FIDO_MAXMSG);
+
+	return (r);
+}
+
+static int
+credman_get_metadata_wait(fido_dev_t *dev, fido_credman_metadata_t *metadata,
+    const char *pin, int *ms)
+{
+	int r;
+
+	if ((r = credman_tx(dev, CMD_CRED_METADATA, NULL, pin, NULL,
+	    FIDO_OPT_TRUE, ms)) != FIDO_OK ||
+	    (r = credman_rx_metadata(dev, metadata, ms)) != FIDO_OK)
+		return (r);
+
+	return (FIDO_OK);
+}
+
+int
+fido_credman_get_dev_metadata(fido_dev_t *dev, fido_credman_metadata_t *metadata,
+    const char *pin)
+{
+	int ms = dev->timeout_ms;
+
+	return (credman_get_metadata_wait(dev, metadata, pin, &ms));
+}
+
+static int
+credman_parse_rk(const cbor_item_t *key, const cbor_item_t *val, void *arg)
+{
+	fido_cred_t	*cred = arg;
+	uint64_t	 prot;
+
+	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 6:
+		return (cbor_decode_user(val, &cred->user));
+	case 7:
+		return (cbor_decode_cred_id(val, &cred->attcred.id));
+	case 8:
+		if (cbor_decode_pubkey(val, &cred->attcred.type,
+		    &cred->attcred.pubkey) < 0)
+			return (-1);
+		cred->type = cred->attcred.type; /* XXX */
+		return (0);
+	case 10:
+		if (cbor_decode_uint64(val, &prot) < 0 || prot > INT_MAX ||
+		    fido_cred_set_prot(cred, (int)prot) != FIDO_OK)
+			return (-1);
+		return (0);
+	case 11:
+		return (fido_blob_decode(val, &cred->largeblob_key));
+	default:
+		fido_log_debug("%s: cbor type", __func__);
+		return (0); /* ignore */
+	}
+}
+
+static void
+credman_reset_rk(fido_credman_rk_t *rk)
+{
+	for (size_t i = 0; i < rk->n_alloc; i++) {
+		fido_cred_reset_tx(&rk->ptr[i]);
+		fido_cred_reset_rx(&rk->ptr[i]);
+	}
+
+	free(rk->ptr);
+	rk->ptr = NULL;
+	memset(rk, 0, sizeof(*rk));
+}
+
+static int
+credman_parse_rk_count(const cbor_item_t *key, const cbor_item_t *val,
+    void *arg)
+{
+	fido_credman_rk_t *rk = arg;
+	uint64_t n;
+
+	/* totalCredentials */
+	if (cbor_isa_uint(key) == false ||
+	    cbor_int_get_width(key) != CBOR_INT_8 ||
+	    cbor_get_uint8(key) != 9) {
+		fido_log_debug("%s: cbor_type", __func__);
+		return (0); /* ignore */
+	}
+
+	if (cbor_decode_uint64(val, &n) < 0 || n > SIZE_MAX) {
+		fido_log_debug("%s: cbor_decode_uint64", __func__);
+		return (-1);
+	}
+
+	if (credman_grow_array((void **)&rk->ptr, &rk->n_alloc, &rk->n_rx,
+	    (size_t)n, sizeof(*rk->ptr)) < 0) {
+		fido_log_debug("%s: credman_grow_array", __func__);
+		return (-1);
+	}
+
+	return (0);
+}
+
+static int
+credman_rx_rk(fido_dev_t *dev, fido_credman_rk_t *rk, int *ms)
+{
+	unsigned char	*msg;
+	int		 msglen;
+	int		 r;
+
+	credman_reset_rk(rk);
+
+	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;
+	}
+
+	/* adjust as needed */
+	if ((r = cbor_parse_reply(msg, (size_t)msglen, rk,
+	    credman_parse_rk_count)) != FIDO_OK) {
+		fido_log_debug("%s: credman_parse_rk_count", __func__);
+		goto out;
+	}
+
+	if (rk->n_alloc == 0) {
+		fido_log_debug("%s: n_alloc=0", __func__);
+		r = FIDO_OK;
+		goto out;
+	}
+
+	/* parse the first rk */
+	if ((r = cbor_parse_reply(msg, (size_t)msglen, &rk->ptr[0],
+	    credman_parse_rk)) != FIDO_OK) {
+		fido_log_debug("%s: credman_parse_rk", __func__);
+		goto out;
+	}
+	rk->n_rx = 1;
+
+	r = FIDO_OK;
+out:
+	freezero(msg, FIDO_MAXMSG);
+
+	return (r);
+}
+
+static int
+credman_rx_next_rk(fido_dev_t *dev, fido_credman_rk_t *rk, int *ms)
+{
+	unsigned char	*msg;
+	int		 msglen;
+	int		 r;
+
+	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;
+	}
+
+	/* sanity check */
+	if (rk->n_rx >= rk->n_alloc) {
+		fido_log_debug("%s: n_rx=%zu, n_alloc=%zu", __func__, rk->n_rx,
+		    rk->n_alloc);
+		r = FIDO_ERR_INTERNAL;
+		goto out;
+	}
+
+	if ((r = cbor_parse_reply(msg, (size_t)msglen, &rk->ptr[rk->n_rx],
+	    credman_parse_rk)) != FIDO_OK) {
+		fido_log_debug("%s: credman_parse_rk", __func__);
+		goto out;
+	}
+
+	r = FIDO_OK;
+out:
+	freezero(msg, FIDO_MAXMSG);
+
+	return (r);
+}
+
+static int
+credman_get_rk_wait(fido_dev_t *dev, const char *rp_id, fido_credman_rk_t *rk,
+    const char *pin, int *ms)
+{
+	fido_blob_t	rp_dgst;
+	uint8_t		dgst[SHA256_DIGEST_LENGTH];
+	int		r;
+
+	if (SHA256((const unsigned char *)rp_id, strlen(rp_id), dgst) != dgst) {
+		fido_log_debug("%s: sha256", __func__);
+		return (FIDO_ERR_INTERNAL);
+	}
+
+	rp_dgst.ptr = dgst;
+	rp_dgst.len = sizeof(dgst);
+
+	if ((r = credman_tx(dev, CMD_RK_BEGIN, &rp_dgst, pin, rp_id,
+	    FIDO_OPT_TRUE, ms)) != FIDO_OK ||
+	    (r = credman_rx_rk(dev, rk, ms)) != FIDO_OK)
+		return (r);
+
+	while (rk->n_rx < rk->n_alloc) {
+		if ((r = credman_tx(dev, CMD_RK_NEXT, NULL, NULL, NULL,
+		    FIDO_OPT_FALSE, ms)) != FIDO_OK ||
+		    (r = credman_rx_next_rk(dev, rk, ms)) != FIDO_OK)
+			return (r);
+		rk->n_rx++;
+	}
+
+	return (FIDO_OK);
+}
+
+int
+fido_credman_get_dev_rk(fido_dev_t *dev, const char *rp_id,
+    fido_credman_rk_t *rk, const char *pin)
+{
+	int ms = dev->timeout_ms;
+
+	return (credman_get_rk_wait(dev, rp_id, rk, pin, &ms));
+}
+
+static int
+credman_del_rk_wait(fido_dev_t *dev, const unsigned char *cred_id,
+    size_t cred_id_len, const char *pin, int *ms)
+{
+	fido_blob_t cred;
+	int r;
+
+	memset(&cred, 0, sizeof(cred));
+
+	if (fido_blob_set(&cred, cred_id, cred_id_len) < 0)
+		return (FIDO_ERR_INVALID_ARGUMENT);
+
+	if ((r = credman_tx(dev, CMD_DELETE_CRED, &cred, pin, NULL,
+	    FIDO_OPT_TRUE, ms)) != FIDO_OK ||
+	    (r = fido_rx_cbor_status(dev, ms)) != FIDO_OK)
+		goto fail;
+
+	r = FIDO_OK;
+fail:
+	free(cred.ptr);
+
+	return (r);
+}
+
+int
+fido_credman_del_dev_rk(fido_dev_t *dev, const unsigned char *cred_id,
+    size_t cred_id_len, const char *pin)
+{
+	int ms = dev->timeout_ms;
+
+	return (credman_del_rk_wait(dev, cred_id, cred_id_len, pin, &ms));
+}
+
+static int
+credman_parse_rp(const cbor_item_t *key, const cbor_item_t *val, void *arg)
+{
+	struct fido_credman_single_rp *rp = arg;
+
+	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 3:
+		return (cbor_decode_rp_entity(val, &rp->rp_entity));
+	case 4:
+		return (fido_blob_decode(val, &rp->rp_id_hash));
+	default:
+		fido_log_debug("%s: cbor type", __func__);
+		return (0); /* ignore */
+	}
+}
+
+static void
+credman_reset_rp(fido_credman_rp_t *rp)
+{
+	for (size_t i = 0; i < rp->n_alloc; i++) {
+		free(rp->ptr[i].rp_entity.id);
+		free(rp->ptr[i].rp_entity.name);
+		rp->ptr[i].rp_entity.id = NULL;
+		rp->ptr[i].rp_entity.name = NULL;
+		fido_blob_reset(&rp->ptr[i].rp_id_hash);
+	}
+
+	free(rp->ptr);
+	rp->ptr = NULL;
+	memset(rp, 0, sizeof(*rp));
+}
+
+static int
+credman_parse_rp_count(const cbor_item_t *key, const cbor_item_t *val,
+    void *arg)
+{
+	fido_credman_rp_t *rp = arg;
+	uint64_t n;
+
+	/* totalRPs */
+	if (cbor_isa_uint(key) == false ||
+	    cbor_int_get_width(key) != CBOR_INT_8 ||
+	    cbor_get_uint8(key) != 5) {
+		fido_log_debug("%s: cbor_type", __func__);
+		return (0); /* ignore */
+	}
+
+	if (cbor_decode_uint64(val, &n) < 0 || n > SIZE_MAX) {
+		fido_log_debug("%s: cbor_decode_uint64", __func__);
+		return (-1);
+	}
+
+	if (credman_grow_array((void **)&rp->ptr, &rp->n_alloc, &rp->n_rx,
+	    (size_t)n, sizeof(*rp->ptr)) < 0) {
+		fido_log_debug("%s: credman_grow_array", __func__);
+		return (-1);
+	}
+
+	return (0);
+}
+
+static int
+credman_rx_rp(fido_dev_t *dev, fido_credman_rp_t *rp, int *ms)
+{
+	unsigned char	*msg;
+	int		 msglen;
+	int		 r;
+
+	credman_reset_rp(rp);
+
+	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;
+	}
+
+	/* adjust as needed */
+	if ((r = cbor_parse_reply(msg, (size_t)msglen, rp,
+	    credman_parse_rp_count)) != FIDO_OK) {
+		fido_log_debug("%s: credman_parse_rp_count", __func__);
+		goto out;
+	}
+
+	if (rp->n_alloc == 0) {
+		fido_log_debug("%s: n_alloc=0", __func__);
+		r = FIDO_OK;
+		goto out;
+	}
+
+	/* parse the first rp */
+	if ((r = cbor_parse_reply(msg, (size_t)msglen, &rp->ptr[0],
+	    credman_parse_rp)) != FIDO_OK) {
+		fido_log_debug("%s: credman_parse_rp", __func__);
+		goto out;
+	}
+	rp->n_rx = 1;
+
+	r = FIDO_OK;
+out:
+	freezero(msg, FIDO_MAXMSG);
+
+	return (r);
+}
+
+static int
+credman_rx_next_rp(fido_dev_t *dev, fido_credman_rp_t *rp, int *ms)
+{
+	unsigned char	*msg;
+	int		 msglen;
+	int		 r;
+
+	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;
+	}
+
+	/* sanity check */
+	if (rp->n_rx >= rp->n_alloc) {
+		fido_log_debug("%s: n_rx=%zu, n_alloc=%zu", __func__, rp->n_rx,
+		    rp->n_alloc);
+		r = FIDO_ERR_INTERNAL;
+		goto out;
+	}
+
+	if ((r = cbor_parse_reply(msg, (size_t)msglen, &rp->ptr[rp->n_rx],
+	    credman_parse_rp)) != FIDO_OK) {
+		fido_log_debug("%s: credman_parse_rp", __func__);
+		goto out;
+	}
+
+	r = FIDO_OK;
+out:
+	freezero(msg, FIDO_MAXMSG);
+
+	return (r);
+}
+
+static int
+credman_get_rp_wait(fido_dev_t *dev, fido_credman_rp_t *rp, const char *pin,
+    int *ms)
+{
+	int r;
+
+	if ((r = credman_tx(dev, CMD_RP_BEGIN, NULL, pin, NULL,
+	    FIDO_OPT_TRUE, ms)) != FIDO_OK ||
+	    (r = credman_rx_rp(dev, rp, ms)) != FIDO_OK)
+		return (r);
+
+	while (rp->n_rx < rp->n_alloc) {
+		if ((r = credman_tx(dev, CMD_RP_NEXT, NULL, NULL, NULL,
+		    FIDO_OPT_FALSE, ms)) != FIDO_OK ||
+		    (r = credman_rx_next_rp(dev, rp, ms)) != FIDO_OK)
+			return (r);
+		rp->n_rx++;
+	}
+
+	return (FIDO_OK);
+}
+
+int
+fido_credman_get_dev_rp(fido_dev_t *dev, fido_credman_rp_t *rp, const char *pin)
+{
+	int ms = dev->timeout_ms;
+
+	return (credman_get_rp_wait(dev, rp, pin, &ms));
+}
+
+static int
+credman_set_dev_rk_wait(fido_dev_t *dev, fido_cred_t *cred, const char *pin,
+    int *ms)
+{
+	int r;
+
+	if ((r = credman_tx(dev, CMD_UPDATE_CRED, cred, pin, NULL,
+	    FIDO_OPT_TRUE, ms)) != FIDO_OK ||
+	    (r = fido_rx_cbor_status(dev, ms)) != FIDO_OK)
+		return (r);
+
+	return (FIDO_OK);
+}
+
+int
+fido_credman_set_dev_rk(fido_dev_t *dev, fido_cred_t *cred, const char *pin)
+{
+	int ms = dev->timeout_ms;
+
+	return (credman_set_dev_rk_wait(dev, cred, pin, &ms));
+}
+
+fido_credman_rk_t *
+fido_credman_rk_new(void)
+{
+	return (calloc(1, sizeof(fido_credman_rk_t)));
+}
+
+void
+fido_credman_rk_free(fido_credman_rk_t **rk_p)
+{
+	fido_credman_rk_t *rk;
+
+	if (rk_p == NULL || (rk = *rk_p) == NULL)
+		return;
+
+	credman_reset_rk(rk);
+	free(rk);
+	*rk_p = NULL;
+}
+
+size_t
+fido_credman_rk_count(const fido_credman_rk_t *rk)
+{
+	return (rk->n_rx);
+}
+
+const fido_cred_t *
+fido_credman_rk(const fido_credman_rk_t *rk, size_t idx)
+{
+	if (idx >= rk->n_alloc)
+		return (NULL);
+
+	return (&rk->ptr[idx]);
+}
+
+fido_credman_metadata_t *
+fido_credman_metadata_new(void)
+{
+	return (calloc(1, sizeof(fido_credman_metadata_t)));
+}
+
+void
+fido_credman_metadata_free(fido_credman_metadata_t **metadata_p)
+{
+	fido_credman_metadata_t *metadata;
+
+	if (metadata_p == NULL || (metadata = *metadata_p) == NULL)
+		return;
+
+	free(metadata);
+	*metadata_p = NULL;
+}
+
+uint64_t
+fido_credman_rk_existing(const fido_credman_metadata_t *metadata)
+{
+	return (metadata->rk_existing);
+}
+
+uint64_t
+fido_credman_rk_remaining(const fido_credman_metadata_t *metadata)
+{
+	return (metadata->rk_remaining);
+}
+
+fido_credman_rp_t *
+fido_credman_rp_new(void)
+{
+	return (calloc(1, sizeof(fido_credman_rp_t)));
+}
+
+void
+fido_credman_rp_free(fido_credman_rp_t **rp_p)
+{
+	fido_credman_rp_t *rp;
+
+	if (rp_p == NULL || (rp = *rp_p) == NULL)
+		return;
+
+	credman_reset_rp(rp);
+	free(rp);
+	*rp_p = NULL;
+}
+
+size_t
+fido_credman_rp_count(const fido_credman_rp_t *rp)
+{
+	return (rp->n_rx);
+}
+
+const char *
+fido_credman_rp_id(const fido_credman_rp_t *rp, size_t idx)
+{
+	if (idx >= rp->n_alloc)
+		return (NULL);
+
+	return (rp->ptr[idx].rp_entity.id);
+}
+
+const char *
+fido_credman_rp_name(const fido_credman_rp_t *rp, size_t idx)
+{
+	if (idx >= rp->n_alloc)
+		return (NULL);
+
+	return (rp->ptr[idx].rp_entity.name);
+}
+
+size_t
+fido_credman_rp_id_hash_len(const fido_credman_rp_t *rp, size_t idx)
+{
+	if (idx >= rp->n_alloc)
+		return (0);
+
+	return (rp->ptr[idx].rp_id_hash.len);
+}
+
+const unsigned char *
+fido_credman_rp_id_hash_ptr(const fido_credman_rp_t *rp, size_t idx)
+{
+	if (idx >= rp->n_alloc)
+		return (NULL);
+
+	return (rp->ptr[idx].rp_id_hash.ptr);
+}