wolfSSL: Implement DPP backend functions

Signed-off-by: Juliusz Sosinowicz <juliusz@wolfssl.com>
This commit is contained in:
Juliusz Sosinowicz 2023-03-08 18:18:49 +01:00 committed by Jouni Malinen
parent b37238d3ac
commit ec7f064fa7

View file

@ -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 */
@ -2569,6 +2570,978 @@ int crypto_ec_key_verify_signature(struct crypto_ec_key *key, const u8 *data,
#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 /* WOLFSSL_OLD_FIPS */
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:
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) != (int) 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,
(const char *) wpabuf_head(out));
fail:
wpabuf_clear_free(key_buf);
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:
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:
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 /* WOLFSSL_OLD_FIPS */
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 /* WOLFSSL_OLD_FIPS */
err = wc_ecc_export_private_raw(key->eckey, qx, &qx_len, qy, &qy_len,
priv, &priv_len);
#endif /* WOLFSSL_OLD_FIPS */
if (err != MP_OKAY) {
LOG_WOLF_ERROR_FUNC(wc_ecc_export_private_raw, err);
return NULL;
}
ret = crypto_bignum_init_set(priv, priv_len);
forced_memzero(priv, 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:
os_free(buf);
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 total_sz = 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) {
total_sz += err;
} else {
LOG_WOLF_ERROR_FUNC(wc_DerToPem, err);
goto fail;
}
}
if (total_sz == 0) {
LOG_WOLF_ERROR("No certificates found in PKCS7 input");
goto fail;
}
ret = wpabuf_alloc(total_sz);
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;
/* 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. */
err = wc_DerToPem(p7->cert[i], p7->certSz[i],
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 {
/* For parsed csr should be read-only for higher levels */
DecodedCert dc;
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 in_sz)
{
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 /* WOLFSSL_CERT_GEN_CACHE */
break;
case cert_type_none:
break;
}
switch (type) {
case cert_type_decoded_cert:
wc_InitDecodedCert(&csr->req.dc, source, in_sz, 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);
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 (const u8 *) csr->req.dc.cPwd;
case cert_type_cert:
*type = ASN1_TAG_UTF8STRING;
*len = os_strlen(csr->req.c.challengePw);
return (const u8 *) csr->req.c.challengePw;
case cert_type_none:
return NULL;
}
break;
}
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:
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:
crypto_csr_deinit(csr);
return NULL;
}
/* END Certificate Signing Request (CSR) APIs */
#endif /* CONFIG_DPP */
void crypto_unload(void)
{