Signed-off-by: Juliusz Sosinowicz <juliusz@xxxxxxxxxxx>
---
src/crypto/crypto_wolfssl.c | 960 +++++++++++++++++++++++++++++++++++-
1 file changed, 958 insertions(+), 2 deletions(-)
diff --git a/src/crypto/crypto_wolfssl.c b/src/crypto/crypto_wolfssl.c
index cacee0c8a..7d3672f01 100644
--- a/src/crypto/crypto_wolfssl.c
+++ b/src/crypto/crypto_wolfssl.c
@@ -10,6 +10,7 @@
#include "common.h"
#include "crypto.h"
+#include "tls/asn1.h"
/* wolfSSL headers */
#include <wolfssl/options.h> /* options.h needs to be included first */
@@ -1555,6 +1556,9 @@ int ecc_projective_add_point(ecc_point *P, ecc_point *Q, ecc_point *R,
struct crypto_ec {
ecc_key* key;
+#ifdef CONFIG_DPP
+ ecc_point* g; /* Only used in DPP for now */
+#endif
mp_int a;
mp_int prime;
mp_int order;
@@ -1596,6 +1600,18 @@ struct crypto_ec * crypto_ec_init(int group)
LOG_WOLF_ERROR_FUNC(wc_ecc_set_curve, err);
goto done;
}
+#ifdef CONFIG_DPP
+ e->g = wc_ecc_new_point();
+ if (!e->g) {
+ LOG_WOLF_ERROR_FUNC_NULL(wc_ecc_new_point);
+ goto done;
+ }
+ err = wc_ecc_get_generator(e->g, wc_ecc_get_curve_idx(curve_id));
+ if (err != MP_OKAY) {
+ LOG_WOLF_ERROR_FUNC(wc_ecc_get_generator, err);
+ goto done;
+ }
+#endif
err = mp_init_multi(&e->a, &e->prime, &e->order, &e->b, NULL, NULL);
if (err != MP_OKAY) {
LOG_WOLF_ERROR_FUNC(mp_init_multi, err);
@@ -1646,7 +1662,9 @@ void crypto_ec_deinit(struct crypto_ec* e)
mp_clear(&e->order);
mp_clear(&e->prime);
mp_clear(&e->a);
- wc_ecc_free(&e->key);
+#ifdef CONFIG_DPP
+ wc_ecc_del_point(e->g);
+#endif
if (e->ownKey)
ecc_key_deinit(e->key);
os_free(e);
@@ -1719,6 +1737,14 @@ const struct crypto_bignum * crypto_ec_get_b(struct crypto_ec *e)
}
+#ifdef CONFIG_DPP
+const struct crypto_ec_point * crypto_ec_get_generator(struct crypto_ec *e)
+{
+ return (const struct crypto_ec_point *) e->g;
+}
+#endif
+
+
int crypto_ec_point_x(struct crypto_ec *e, const struct crypto_ec_point *p,
struct crypto_bignum *x)
{
@@ -2441,9 +2467,939 @@ int crypto_ec_key_verify_signature(struct crypto_ec_key *key, const u8 *data,
return res;
}
-
#endif /* CONFIG_ECC */
+#ifdef CONFIG_DPP
+struct wpabuf * crypto_ec_key_get_ecprivate_key(struct crypto_ec_key *key,
+ bool include_pub)
+{
+ int len;
+ int err;
+ struct wpabuf * ret = NULL;
+
+ if (!key || !key->eckey) {
+ LOG_INVALID_PARAMETERS();
+ return NULL;
+ }
+
+#ifdef WOLFSSL_OLD_FIPS
+ if (key->eckey->type != ECC_PRIVATEKEY && key->eckey->type != ECC_PRIVATEKEY_ONLY) {
+ LOG_INVALID_PARAMETERS();
+ return NULL;
+ }
+#endif
+
+ len = err = wc_EccKeyDerSize(key->eckey, include_pub);
+ if (err == ECC_PRIVATEONLY_E && include_pub) {
+ if (crypto_ec_key_gen_public_key(key) != 0) {
+ LOG_WOLF_ERROR_FUNC(crypto_ec_key_gen_public_key, -1);
+ return NULL;
+ }
+ len = err = wc_EccKeyDerSize(key->eckey, include_pub);
+ }
+ if (err <= 0) {
+ /* Exception for BAD_FUNC_ARG because higher levels blindly call this
+ * function to determine if this is a private key or not. BAD_FUNC_ARG
+ * most probably means that key->eckey is a public key not private. */
+ if (err != BAD_FUNC_ARG)
+ LOG_WOLF_ERROR_FUNC(wc_EccKeyDerSize, err);
+ return NULL;
+ }
+
+ ret = wpabuf_alloc(len);
+ if (!ret) {
+ LOG_WOLF_ERROR_FUNC_NULL(wpabuf_alloc);
+ return NULL;
+ }
+
+ if (include_pub)
+ err = wc_EccKeyToDer(key->eckey, wpabuf_put(ret, len), len);
+ else
+ err = wc_EccPrivateKeyToDer(key->eckey, wpabuf_put(ret, len), len);
+
+ if (err != len) {
+ LOG_WOLF_ERROR_VA("%s failed with err: %d", include_pub ?
+ "wc_EccKeyToDer" : "wc_EccPrivateKeyToDer", err);
+ wpabuf_free(ret);
+ ret = NULL;
+ }
+
+ return ret;
+}
+
+struct wpabuf * crypto_ec_key_get_pubkey_point(struct crypto_ec_key *key,
+ int prefix)
+{
+ int err;
+ word32 len = 0;
+ struct wpabuf * ret = NULL;
+
+ if (!key || !key->eckey) {
+ LOG_INVALID_PARAMETERS();
+ return NULL;
+ }
+
+ err = wc_ecc_export_x963(key->eckey, NULL, &len);
+ if (err != LENGTH_ONLY_E) {
+ LOG_WOLF_ERROR_FUNC(wc_ecc_export_x963, err);
+ goto fail;
+ }
+
+ ret = wpabuf_alloc(len);
+ if (!ret) {
+ LOG_WOLF_ERROR_FUNC_NULL(wpabuf_alloc);
+ goto fail;
+ }
+
+ err = wc_ecc_export_x963(key->eckey, wpabuf_mhead(ret), &len);
+ if (err == ECC_PRIVATEONLY_E) {
+ if (crypto_ec_key_gen_public_key(key) != 0) {
+ LOG_WOLF_ERROR_FUNC(crypto_ec_key_gen_public_key, -1);
+ goto fail;
+ }
+ err = wc_ecc_export_x963(key->eckey, wpabuf_mhead(ret), &len);
+ }
+ if (err != MP_OKAY) {
+ LOG_WOLF_ERROR_FUNC(wc_ecc_export_x963, err);
+ goto fail;
+ }
+
+ if (!prefix)
+ os_memmove(wpabuf_mhead(ret), wpabuf_mhead_u8(ret) + 1, (size_t)--len);
+ wpabuf_put(ret, len);
+
+ return ret;
+
+fail:
+ if (ret)
+ wpabuf_free(ret);
+ return NULL;
+}
+
+struct crypto_ec_key * crypto_ec_key_set_pub(int group, const u8 *x,
+ const u8 *y, size_t len)
+{
+ struct crypto_ec_key * ret = NULL;
+ int curve_id = crypto_ec_group_2_id(group);
+ int err;
+
+ if (!x || !y || len == 0 || curve_id == ECC_CURVE_INVALID ||
+ wc_ecc_get_curve_size_from_id(curve_id) != len) {
+ LOG_INVALID_PARAMETERS();
+ return NULL;
+ }
+
+ ret = crypto_ec_key_init();
+ if (!ret) {
+ LOG_WOLF_ERROR_FUNC_NULL(crypto_ec_key_init);
+ return NULL;
+ }
+
+ /* Cast necessary for FIPS API */
+ err = wc_ecc_import_unsigned(ret->eckey, (u8*)x, (u8*)y, NULL, curve_id);
+ if (err != MP_OKAY) {
+ LOG_WOLF_ERROR_FUNC(wc_ecc_import_unsigned, err);
+ crypto_ec_key_deinit(ret);
+ return NULL;
+ }
+
+ return ret;
+}
+
+
+int crypto_ec_key_cmp(struct crypto_ec_key *key1, struct crypto_ec_key *key2)
+{
+ int ret;
+ struct wpabuf * key1_buf = crypto_ec_key_get_subject_public_key(key1);
+ struct wpabuf * key2_buf = crypto_ec_key_get_subject_public_key(key2);
+
+ if ((key1 && !key1_buf) || (key2 && !key2_buf)) {
+ LOG_WOLF_ERROR("crypto_ec_key_get_subject_public_key failed");
+ return -1;
+ }
+
+ ret = wpabuf_cmp(key1_buf, key2_buf);
+ if (ret != 0)
+ ret = -1; /* Default to -1 for different keys */
+
+ wpabuf_clear_free(key1_buf);
+ wpabuf_clear_free(key2_buf);
+ return ret;
+}
+
+/* wolfSSL doesn't have a pretty print function for keys so just print out the
+ * PEM of the private key. */
+void crypto_ec_key_debug_print(const struct crypto_ec_key *key,
+ const char *title)
+{
+ struct wpabuf * key_buf;
+ struct wpabuf * out = NULL;
+ int err;
+ int pem_len;
+
+ if (!key || !key->eckey) {
+ LOG_INVALID_PARAMETERS();
+ return;
+ }
+
+ if (key->eckey->type == ECC_PUBLICKEY)
+ key_buf = crypto_ec_key_get_subject_public_key((struct crypto_ec_key *)key);
+ else
+ key_buf = crypto_ec_key_get_ecprivate_key((struct crypto_ec_key *)key, 1);
+
+ if (!key_buf) {
+ LOG_WOLF_ERROR_VA("%s has returned NULL", key->eckey->type == ECC_PUBLICKEY ?
+ "crypto_ec_key_get_subject_public_key" : "crypto_ec_key_get_ecprivate_key");
+ goto fail;
+ }
+
+ if (!title)
+ title = "";
+
+ err = wc_DerToPem(wpabuf_head(key_buf), wpabuf_len(key_buf), NULL, 0,
+ ECC_TYPE);
+ if (err <= 0) {
+ LOG_WOLF_ERROR_FUNC(wc_DerToPem, err);
+ goto fail;
+ }
+ pem_len = err;
+
+ out = wpabuf_alloc(pem_len + 1);
+ if (!out) {
+ LOG_WOLF_ERROR_FUNC_NULL(wc_DerToPem);
+ goto fail;
+ }
+
+ err = wc_DerToPem(wpabuf_head(key_buf), wpabuf_len(key_buf),
+ wpabuf_mhead(out), pem_len, ECC_TYPE);
+ if (err <= 0) {
+ LOG_WOLF_ERROR_FUNC(wc_DerToPem, err);
+ goto fail;
+ }
+
+ wpabuf_mhead_u8(out)[err] = '\0';
+ wpabuf_put(out, err + 1);
+ wpa_printf(MSG_DEBUG, "%s:\n%s", title, (char*)wpabuf_head(out));
+
+fail:
+ if (key_buf)
+ wpabuf_clear_free(key_buf);
+ if (out)
+ wpabuf_clear_free(out);
+}
+
+
+void crypto_ec_point_debug_print(const struct crypto_ec *e,
+ const struct crypto_ec_point *p, const char *title)
+{
+ u8 x[ECC_MAXSIZE];
+ u8 y[ECC_MAXSIZE];
+ int coord_size;
+ int err;
+
+ if (!p || !e) {
+ LOG_INVALID_PARAMETERS();
+ return;
+ }
+
+ coord_size = e->key->dp->size;
+
+ if (!title)
+ title = "";
+
+ err = crypto_ec_point_to_bin((struct crypto_ec *)e, p, x, y);
+ if (err != 0) {
+ LOG_WOLF_ERROR_FUNC(crypto_ec_point_to_bin, err);
+ return;
+ }
+
+ wpa_hexdump(MSG_DEBUG, title, x, coord_size);
+ wpa_hexdump(MSG_DEBUG, title, y, coord_size);
+}
+
+struct crypto_ec_key * crypto_ec_key_gen(int group)
+{
+ int curve_id = crypto_ec_group_2_id(group);
+ int err;
+ struct crypto_ec_key * ret = NULL;
+
+ if (curve_id == ECC_CURVE_INVALID) {
+ LOG_INVALID_PARAMETERS();
+ return NULL;
+ }
+
+ ret = crypto_ec_key_init();
+ if (!ret) {
+ LOG_WOLF_ERROR_FUNC_NULL(crypto_ec_key_init);
+ return NULL;
+ }
+
+ if (!crypto_ec_key_init_rng(ret)) {
+ LOG_WOLF_ERROR_FUNC_NULL(crypto_ec_key_init_rng);
+ goto fail;
+ }
+
+ err = wc_ecc_make_key_ex(ret->rng, 0, ret->eckey, curve_id);
+ if (err != MP_OKAY) {
+ LOG_WOLF_ERROR_FUNC(wc_ecc_make_key_ex, err);
+ goto fail;
+ }
+
+ return ret;
+fail:
+ if (ret)
+ crypto_ec_key_deinit(ret);
+ return NULL;
+}
+
+int crypto_ec_key_verify_signature_r_s(struct crypto_ec_key *key,
+ const u8 *data, size_t len,
+ const u8 *r, size_t r_len,
+ const u8 *s, size_t s_len)
+{
+ int err;
+ u8 sig[ECC_MAX_SIG_SIZE];
+ word32 sig_len = ECC_MAX_SIG_SIZE;
+
+ if (!key || !key->eckey || !data || !len || !r || !r_len || !s || !s_len) {
+ LOG_INVALID_PARAMETERS();
+ return -1;
+ }
+
+ err = wc_ecc_rs_raw_to_sig(r, r_len, s, s_len, sig, &sig_len);
+ if (err != MP_OKAY) {
+ LOG_WOLF_ERROR_FUNC(wc_ecc_rs_raw_to_sig, err);
+ return -1;
+ }
+
+ return crypto_ec_key_verify_signature(key, data, len, sig, sig_len);
+}
+
+
+struct crypto_ec_point * crypto_ec_key_get_public_key(struct crypto_ec_key *key)
+{
+ ecc_point *point = NULL;
+ int err;
+ u8 *der = NULL;
+ word32 der_len = 0;
+
+ if (!key || !key->eckey || !key->eckey->dp) {
+ LOG_INVALID_PARAMETERS();
+ goto fail;
+ }
+
+ err = wc_ecc_export_x963(key->eckey, NULL, &der_len);
+ if (err != LENGTH_ONLY_E) {
+ LOG_WOLF_ERROR_FUNC(wc_ecc_export_x963, err);
+ goto fail;
+ }
+
+ der = os_malloc(der_len);
+ if (!der) {
+ LOG_WOLF_ERROR_FUNC_NULL(os_malloc);
+ goto fail;
+ }
+
+ err = wc_ecc_export_x963(key->eckey, der, &der_len);
+ if (err == ECC_PRIVATEONLY_E) {
+ if (crypto_ec_key_gen_public_key(key) != 0) {
+ LOG_WOLF_ERROR_FUNC(crypto_ec_key_gen_public_key, -1);
+ goto fail;
+ }
+ err = wc_ecc_export_x963(key->eckey, der, &der_len);
+ }
+ if (err != MP_OKAY) {
+ LOG_WOLF_ERROR_FUNC(wc_ecc_export_x963, err);
+ goto fail;
+ }
+
+ point = wc_ecc_new_point();
+ if (!point) {
+ LOG_WOLF_ERROR_FUNC_NULL(wc_ecc_new_point);
+ goto fail;
+ }
+
+ err = wc_ecc_import_point_der(der, der_len, key->eckey->idx, point);
+ if (err != MP_OKAY) {
+ LOG_WOLF_ERROR_FUNC(wc_ecc_import_point_der, err);
+ goto fail;
+ }
+
+ os_free(der);
+ return (struct crypto_ec_point *) point;
+
+fail:
+ if (der)
+ os_free(der);
+ if (point)
+ wc_ecc_del_point(point);
+ return NULL;
+}
+
+struct crypto_bignum * crypto_ec_key_get_private_key(struct crypto_ec_key *key)
+{
+ u8 priv[ECC_MAXSIZE];
+ word32 priv_len = ECC_MAXSIZE;
+#ifdef WOLFSSL_OLD_FIPS
+ /* Needed to be compliant with the old API */
+ u8 qx[ECC_MAXSIZE];
+ word32 qx_len = ECC_MAXSIZE;
+ u8 qy[ECC_MAXSIZE];
+ word32 qy_len = ECC_MAXSIZE;
+#endif
+ struct crypto_bignum * ret = NULL;
+ int err;
+
+ if (!key || !key->eckey) {
+ LOG_INVALID_PARAMETERS();
+ return NULL;
+ }
+
+#ifndef WOLFSSL_OLD_FIPS
+ err = wc_ecc_export_private_raw(key->eckey, NULL, NULL, NULL, NULL, priv, &priv_len);
+#else
+ err = wc_ecc_export_private_raw(key->eckey, qx, &qx_len, qy, &qy_len, priv, &priv_len);
+#endif
+ if (err != MP_OKAY) {
+ LOG_WOLF_ERROR_FUNC(wc_ecc_export_private_raw, err);
+ return NULL;
+ }
+
+ ret = crypto_bignum_init_set(priv, priv_len);
+ os_memset(priv, 0, priv_len);
+ return ret;
+}
+
+struct wpabuf * crypto_ec_key_sign_r_s(struct crypto_ec_key *key,
+ const u8 *data, size_t len)
+{
+ int err;
+ u8 success = 0;
+ mp_int r;
+ mp_int s;
+ u8 rs_init = 0;
+ int sz;
+ struct wpabuf * ret = NULL;
+
+ if (!key || !key->eckey || !key->eckey->dp || !data || !len) {
+ LOG_INVALID_PARAMETERS();
+ return NULL;
+ }
+
+ sz = key->eckey->dp->size;
+
+ if (!crypto_ec_key_init_rng(key)) {
+ LOG_WOLF_ERROR_FUNC_NULL(crypto_ec_key_init_rng);
+ goto fail;
+ }
+
+ err = mp_init_multi(&r, &s, NULL, NULL, NULL, NULL);
+ if (err != MP_OKAY) {
+ LOG_WOLF_ERROR_FUNC(mp_init_multi, err);
+ goto fail;
+ }
+ rs_init = 1;
+
+ err = wc_ecc_sign_hash_ex(data, len, key->rng, key->eckey, &r, &s);
+ if (err != MP_OKAY) {
+ LOG_WOLF_ERROR_FUNC(wc_ecc_sign_hash_ex, err);
+ goto fail;
+ }
+
+ if (mp_unsigned_bin_size(&r) > sz || mp_unsigned_bin_size(&s) > sz) {
+ LOG_WOLF_ERROR_VA("Unexpected size of r or s (%d %d %d)", sz,
+ mp_unsigned_bin_size(&r), mp_unsigned_bin_size(&s));
+ goto fail;
+ }
+
+ ret = wpabuf_alloc(2 * sz);
+ if (!ret) {
+ LOG_WOLF_ERROR_FUNC_NULL(wpabuf_alloc);
+ goto fail;
+ }
+
+ err = mp_to_unsigned_bin_len(&r, wpabuf_put(ret, sz), sz);
+ if (err == MP_OKAY)
+ err = mp_to_unsigned_bin_len(&s, wpabuf_put(ret, sz), sz);
+ if (err != MP_OKAY) {
+ LOG_WOLF_ERROR_FUNC(wc_ecc_sign_hash_ex, err);
+ goto fail;
+ }
+
+ success = 1;
+fail:
+ if (rs_init) {
+ mp_free(&r);
+ mp_free(&s);
+ }
+ if (!success) {
+ wpabuf_free(ret);
+ ret = NULL;
+ }
+
+ return ret;
+}
+
+struct crypto_ec_key *
+crypto_ec_key_set_pub_point(struct crypto_ec *e,
+ const struct crypto_ec_point *pub)
+{
+ struct crypto_ec_key * ret = NULL;
+ int err;
+ byte* buf = NULL;
+ word32 buf_len = 0;
+
+ if (!e || !pub) {
+ LOG_INVALID_PARAMETERS();
+ return NULL;
+ }
+
+ /* Export to DER to not mess with wolfSSL internals */
+ err = wc_ecc_export_point_der(wc_ecc_get_curve_idx(e->curve_id),
+ (ecc_point*)pub, NULL, &buf_len);
+ if (err != LENGTH_ONLY_E || !buf_len) {
+ LOG_WOLF_ERROR_FUNC(wc_ecc_export_point_der, err);
+ goto fail;
+ }
+
+ buf = os_malloc(buf_len);
+ if (!buf) {
+ LOG_WOLF_ERROR_FUNC_NULL(os_malloc);
+ goto fail;
+ }
+
+ err = wc_ecc_export_point_der(wc_ecc_get_curve_idx(e->curve_id),
+ (ecc_point*)pub, buf, &buf_len);
+ if (err != MP_OKAY) {
+ LOG_WOLF_ERROR_FUNC(wc_ecc_export_point_der, err);
+ goto fail;
+ }
+
+ ret = crypto_ec_key_init();
+ if (!ret) {
+ LOG_WOLF_ERROR_FUNC_NULL(crypto_ec_key_init);
+ goto fail;
+ }
+
+ err = wc_ecc_import_x963_ex(buf, buf_len, ret->eckey, e->curve_id);
+ if (err != MP_OKAY) {
+ LOG_WOLF_ERROR_FUNC(wc_ecc_import_x963_ex, err);
+ goto fail;
+ }
+
+ os_free(buf);
+ return ret;
+
+fail:
+ if (buf)
+ os_free(buf);
+ if (ret)
+ crypto_ec_key_deinit(ret);
+ return NULL;
+}
+
+struct wpabuf * crypto_pkcs7_get_certificates(const struct wpabuf *pkcs7)
+{
+ PKCS7* p7 = NULL;
+ struct wpabuf * ret = NULL;
+ int err = 0;
+ int totalSz = 0;
+ int i;
+
+ if (!pkcs7) {
+ LOG_INVALID_PARAMETERS();
+ return NULL;
+ }
+
+ p7 = wc_PKCS7_New(NULL, INVALID_DEVID);
+ if (!p7) {
+ LOG_WOLF_ERROR_FUNC_NULL(wc_PKCS7_New);
+ return NULL;
+ }
+
+ err = wc_PKCS7_VerifySignedData(p7, (byte*)wpabuf_head(pkcs7),
+ wpabuf_len(pkcs7));
+ if (err != 0) {
+ LOG_WOLF_ERROR_FUNC(wc_PKCS7_VerifySignedData, err);
+ wc_PKCS7_Free(p7);
+ goto fail;
+ }
+
+ /* Need to access p7 members directly */
+ for (i = 0; i < MAX_PKCS7_CERTS; i++) {
+ if (p7->certSz[i] == 0)
+ continue;
+ err = wc_DerToPem(p7->cert[i], p7->certSz[i], NULL, 0, CERT_TYPE);
+ if (err > 0)
+ totalSz += err;
+ else {
+ LOG_WOLF_ERROR_FUNC(wc_DerToPem, err);
+ goto fail;
+ }
+ }
+
+ if (totalSz == 0) {
+ LOG_WOLF_ERROR("No certificates found in PKCS7 input");
+ goto fail;
+ }
+
+ ret = wpabuf_alloc(totalSz);
+ if (!ret) {
+ LOG_WOLF_ERROR_FUNC_NULL(wpabuf_alloc);
+ goto fail;
+ }
+
+ /* Need to access p7 members directly */
+ for (i = 0; i < MAX_PKCS7_CERTS; i++) {
+ if (p7->certSz[i] == 0)
+ continue;
+ err = wc_DerToPem(p7->cert[i], p7->certSz[i],
+ /* Not using wpabuf_put here so that wpabuf_overflow isn't
+ * called in case of a size mismatch. wc_DerToPem checks if the
+ * output is large enough internally. */
+ wpabuf_mhead_u8(ret) + wpabuf_len(ret), wpabuf_tailroom(ret),
+ CERT_TYPE);
+ if (err > 0)
+ wpabuf_put(ret, err);
+ else {
+ LOG_WOLF_ERROR_FUNC(wc_DerToPem, err);
+ wpabuf_free(ret);
+ ret = NULL;
+ goto fail;
+ }
+ }
+
+fail:
+ if (p7)
+ wc_PKCS7_Free(p7);
+ return ret;
+}
+
+/* BEGIN Certificate Signing Request (CSR) APIs */
+
+enum cert_type {
+ cert_type_none = 0,
+ cert_type_decoded_cert,
+ cert_type_cert,
+};
+
+struct crypto_csr {
+ union {
+ DecodedCert dc; /* For parsed csr should be read-only for higher levels */
+ Cert c; /* For generating a csr */
+ } req;
+ enum cert_type type;
+ struct crypto_ec_key *pubkey;
+};
+
+/* Helper function to make sure that the correct type is initialized */
+static void crypto_csr_init_type(struct crypto_csr * csr, enum cert_type type,
+ const byte* source, word32 inSz)
+{
+ int err;
+ if (csr->type == type)
+ return; /* Already correct type */
+ switch (csr->type) {
+ case cert_type_decoded_cert:
+ wc_FreeDecodedCert(&csr->req.dc);
+ break;
+ case cert_type_cert:
+#ifdef WOLFSSL_CERT_GEN_CACHE
+ wc_SetCert_Free(&csr->req.c);
+#endif
+ break;
+ case cert_type_none:
+ break;
+ }
+ switch (type) {
+ case cert_type_decoded_cert:
+ wc_InitDecodedCert(&csr->req.dc, source, inSz, NULL);
+ break;
+ case cert_type_cert:
+ err = wc_InitCert(&csr->req.c);
+ if (err != 0)
+ LOG_WOLF_ERROR_FUNC(wc_InitCert, err);
+ break;
+ case cert_type_none:
+ break;
+ }
+ csr->type = type;
+}
+
+struct crypto_csr * crypto_csr_init(void)
+{
+ struct crypto_csr * ret = os_malloc(sizeof(struct crypto_csr));
+
+ if (!ret) {
+ LOG_WOLF_ERROR_FUNC_NULL(os_malloc);
+ return NULL;
+ }
+
+ ret->type = cert_type_none;
+ crypto_csr_init_type(ret, cert_type_cert, NULL, 0);
+ ret->pubkey = NULL;
+
+ return ret;
+}
+
+void crypto_csr_deinit(struct crypto_csr *csr)
+{
+ if (csr) {
+ crypto_csr_init_type(csr, cert_type_none, NULL, 0);
+ if (csr->pubkey)
+ crypto_ec_key_deinit(csr->pubkey);
+ os_free(csr);
+ }
+}
+
+int crypto_csr_set_ec_public_key(struct crypto_csr *csr,
+ struct crypto_ec_key *key)
+{
+ struct wpabuf * der = NULL;
+
+ if (!csr || !key || !key->eckey) {
+ LOG_INVALID_PARAMETERS();
+ return -1;
+ }
+
+ if (csr->pubkey) {
+ crypto_ec_key_deinit(csr->pubkey);
+ csr->pubkey = NULL;
+ }
+
+ /* Create copy of key to mitigate use-after-free errors */
+ der = crypto_ec_key_get_subject_public_key(key);
+ if (!der) {
+ LOG_WOLF_ERROR_FUNC_NULL(crypto_ec_key_get_subject_public_key);
+ return -1;
+ }
+
+ csr->pubkey = crypto_ec_key_parse_pub(wpabuf_head(der), wpabuf_len(der));
+
+ wpabuf_free(der);
+ if (!csr->pubkey) {
+ LOG_WOLF_ERROR_FUNC_NULL(crypto_ec_key_parse_pub);
+ return -1;
+ }
+ return 0;
+}
+
+int crypto_csr_set_name(struct crypto_csr *csr, enum crypto_csr_name type,
+ const char *name)
+{
+ int name_len;
+ char *dest;
+
+ if (!csr || !name) {
+ LOG_INVALID_PARAMETERS();
+ return -1;
+ }
+
+ if (csr->type != cert_type_cert) {
+ LOG_WOLF_ERROR_VA("csr is incorrect type (%d)", csr->type);
+ return -1;
+ }
+
+ name_len = os_strlen(name);
+ if (name_len >= CTC_NAME_SIZE) {
+ LOG_WOLF_ERROR("name input too long");
+ return -1;
+ }
+
+ switch (type) {
+ case CSR_NAME_CN:
+ dest = csr->req.c.subject.commonName;
+ break;
+ case CSR_NAME_SN:
+ dest = csr->req.c.subject.sur;
+ break;
+ case CSR_NAME_C:
+ dest = csr->req.c.subject.country;
+ break;
+ case CSR_NAME_O:
+ dest = csr->req.c.subject.org;
+ break;
+ case CSR_NAME_OU:
+ dest = csr->req.c.subject.unit;
+ break;
+ default:
+ LOG_INVALID_PARAMETERS();
+ return -1;
+ }
+
+ os_memcpy(dest, name, name_len);
+ dest[name_len] = '\0';
+
+ return 0;
+}
+
+int crypto_csr_set_attribute(struct crypto_csr *csr, enum crypto_csr_attr attr,
+ int attr_type, const u8 *value, size_t len)
+{
+ if (!csr || attr_type != ASN1_TAG_UTF8STRING || !value || len >= CTC_NAME_SIZE) {
+ LOG_INVALID_PARAMETERS();
+ return -1;
+ }
+
+ if (csr->type != cert_type_cert) {
+ LOG_WOLF_ERROR_VA("csr is incorrect type (%d)", csr->type);
+ return -1;
+ }
+
+ switch (attr) {
+ case CSR_ATTR_CHALLENGE_PASSWORD:
+ os_memcpy(csr->req.c.challengePw, value, len);
+ csr->req.c.challengePw[len] = '\0';
+ break;
+ default:
+ return -1;
+ }
+
+ return 0;
+}
+
+const u8 * crypto_csr_get_attribute(struct crypto_csr *csr,
+ enum crypto_csr_attr attr,
+ size_t *len, int *type)
+{
+ if (!csr || !len || !type) {
+ LOG_INVALID_PARAMETERS();
+ return NULL;;
+ }
+
+ switch (attr) {
+ case CSR_ATTR_CHALLENGE_PASSWORD:
+ switch (csr->type) {
+ case cert_type_decoded_cert:
+ *type = ASN1_TAG_UTF8STRING;
+ *len = csr->req.dc.cPwdLen;
+ return (u8*)csr->req.dc.cPwd;
+ case cert_type_cert:
+ *type = ASN1_TAG_UTF8STRING;
+ *len = os_strlen(csr->req.c.challengePw);
+ return (u8*)csr->req.c.challengePw;
+ case cert_type_none:
+ return NULL;
+ }
+ default:
+ return NULL;
+ }
+}
+
+struct wpabuf * crypto_csr_sign(struct crypto_csr *csr,
+ struct crypto_ec_key *key,
+ enum crypto_hash_alg algo)
+{
+ int err;
+ int len;
+ u8 * buf = NULL;
+ int buf_len;
+ struct wpabuf * ret = NULL;
+
+ if (!csr || !key || !key->eckey) {
+ LOG_INVALID_PARAMETERS();
+ return NULL;
+ }
+
+ if (csr->type != cert_type_cert) {
+ LOG_WOLF_ERROR_VA("csr is incorrect type (%d)", csr->type);
+ return NULL;
+ }
+
+ if (!crypto_ec_key_init_rng(key)) {
+ LOG_WOLF_ERROR_FUNC_NULL(crypto_ec_key_init_rng);
+ return NULL;
+ }
+
+ switch (algo) {
+ case CRYPTO_HASH_ALG_SHA256:
+ csr->req.c.sigType = CTC_SHA256wECDSA;
+ break;
+ case CRYPTO_HASH_ALG_SHA384:
+ csr->req.c.sigType = CTC_SHA384wECDSA;
+ break;
+ case CRYPTO_HASH_ALG_SHA512:
+ csr->req.c.sigType = CTC_SHA512wECDSA;
+ break;
+ default:
+ LOG_INVALID_PARAMETERS();
+ return NULL;
+ }
+
+ /* Pass in large value that is guaranteed to be larger than the necessary buffer */
+ err = wc_MakeCertReq(&csr->req.c, NULL, 100000, NULL, csr->pubkey->eckey);
+ if (err <= 0) {
+ LOG_WOLF_ERROR_FUNC(wc_MakeCertReq, err);
+ goto fail;
+ }
+ len = err;
+
+ buf_len = len + MAX_SEQ_SZ * 2 + MAX_ENCODED_SIG_SZ;
+ buf = os_malloc(buf_len);
+ if (!buf) {
+ LOG_WOLF_ERROR_FUNC_NULL(os_malloc);
+ goto fail;
+ }
+
+ err = wc_MakeCertReq(&csr->req.c, buf, buf_len, NULL, csr->pubkey->eckey);
+ if (err <= 0) {
+ LOG_WOLF_ERROR_FUNC(wc_MakeCertReq, err);
+ goto fail;
+ }
+ len = err;
+
+ err = wc_SignCert(len, csr->req.c.sigType, buf, buf_len, NULL, key->eckey, key->rng);
+ if (err <= 0) {
+ LOG_WOLF_ERROR_FUNC(wc_SignCert, err);
+ goto fail;
+ }
+ len = err;
+
+ ret = wpabuf_alloc_copy(buf, len);
+ if (!ret) {
+ LOG_WOLF_ERROR_FUNC_NULL(wpabuf_alloc_copy);
+ goto fail;
+ }
+
+fail:
+ if (buf)
+ os_free(buf);
+ return ret;
+}
+
+struct crypto_csr * crypto_csr_verify(const struct wpabuf *req)
+{
+ struct crypto_csr * csr = NULL;
+ int err;
+
+ if (!req) {
+ LOG_INVALID_PARAMETERS();
+ return NULL;
+ }
+
+ csr = crypto_csr_init();
+ if (!csr) {
+ LOG_WOLF_ERROR_FUNC_NULL(crypto_csr_init);
+ goto fail;
+ }
+
+ crypto_csr_init_type(csr, cert_type_decoded_cert, wpabuf_head(req), wpabuf_len(req));
+ err = wc_ParseCert(&csr->req.dc, CERTREQ_TYPE, VERIFY, NULL);
+ if (err != 0) {
+ LOG_WOLF_ERROR_FUNC(wc_ParseCert, err);
+ goto fail;
+ }
+
+ return csr;
+fail:
+ if (csr)
+ crypto_csr_deinit(csr);
+ return NULL;
+}
+
+/* END Certificate Signing Request (CSR) APIs */
+
+#endif /* CONFIG_DPP */
void crypto_unload(void)
{
--
2.25.1
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