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authorSean Parkinson <sean@wolfssl.com>2017-10-16 05:45:09 (GMT)
committerJouni Malinen <j@w1.fi>2017-12-24 19:40:21 (GMT)
commit04b1bcc5f3b8ff9ceddfa7da5256609eed16d9c5 (patch)
tree3adf81984b7ca8c5d2132a1693255f15667c9cf9
parent0c3d49afd8ff9489f7393aece8f441652162e45e (diff)
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EAP-pwd: Use abstract crypto API
This makes it easier to use EAP-pwd with other crypto libraries than OpenSSL. Signed-off-by: Sean Parkinson <sean@wolfssl.com>
-rw-r--r--hostapd/Android.mk1
-rw-r--r--hostapd/Makefile1
-rw-r--r--src/eap_common/eap_pwd_common.c176
-rw-r--r--src/eap_common/eap_pwd_common.h15
-rw-r--r--src/eap_peer/eap_pwd.c321
-rw-r--r--src/eap_server/eap_server_pwd.c346
-rw-r--r--wpa_supplicant/Android.mk1
-rw-r--r--wpa_supplicant/Makefile1
8 files changed, 320 insertions, 542 deletions
diff --git a/hostapd/Android.mk b/hostapd/Android.mk
index 8fd6fa0..6a62d39 100644
--- a/hostapd/Android.mk
+++ b/hostapd/Android.mk
@@ -455,6 +455,7 @@ ifdef CONFIG_EAP_PWD
L_CFLAGS += -DEAP_SERVER_PWD
OBJS += src/eap_server/eap_server_pwd.c src/eap_common/eap_pwd_common.c
NEED_SHA256=y
+NEED_ECC=y
endif
ifdef CONFIG_EAP_EKE
diff --git a/hostapd/Makefile b/hostapd/Makefile
index eb35672..cb146da 100644
--- a/hostapd/Makefile
+++ b/hostapd/Makefile
@@ -489,6 +489,7 @@ ifdef CONFIG_EAP_PWD
CFLAGS += -DEAP_SERVER_PWD
OBJS += ../src/eap_server/eap_server_pwd.o ../src/eap_common/eap_pwd_common.o
NEED_SHA256=y
+NEED_ECC=y
endif
ifdef CONFIG_EAP_EKE
diff --git a/src/eap_common/eap_pwd_common.c b/src/eap_common/eap_pwd_common.c
index 67f8f70..5e98682 100644
--- a/src/eap_common/eap_pwd_common.c
+++ b/src/eap_common/eap_pwd_common.c
@@ -91,91 +91,33 @@ int compute_password_element(EAP_PWD_group *grp, u16 num,
const u8 *id_peer, size_t id_peer_len,
const u8 *token)
{
- BIGNUM *x_candidate = NULL, *rnd = NULL, *cofactor = NULL;
struct crypto_hash *hash;
unsigned char pwe_digest[SHA256_MAC_LEN], *prfbuf = NULL, ctr;
- int nid, is_odd, ret = 0;
+ int is_odd, ret = 0;
size_t primebytelen, primebitlen;
-
- switch (num) { /* from IANA registry for IKE D-H groups */
- case 19:
- nid = NID_X9_62_prime256v1;
- break;
- case 20:
- nid = NID_secp384r1;
- break;
- case 21:
- nid = NID_secp521r1;
- break;
-#ifndef OPENSSL_IS_BORINGSSL
- case 25:
- nid = NID_X9_62_prime192v1;
- break;
-#endif /* OPENSSL_IS_BORINGSSL */
- case 26:
- nid = NID_secp224r1;
- break;
-#ifdef NID_brainpoolP224r1
- case 27:
- nid = NID_brainpoolP224r1;
- break;
-#endif /* NID_brainpoolP224r1 */
-#ifdef NID_brainpoolP256r1
- case 28:
- nid = NID_brainpoolP256r1;
- break;
-#endif /* NID_brainpoolP256r1 */
-#ifdef NID_brainpoolP384r1
- case 29:
- nid = NID_brainpoolP384r1;
- break;
-#endif /* NID_brainpoolP384r1 */
-#ifdef NID_brainpoolP512r1
- case 30:
- nid = NID_brainpoolP512r1;
- break;
-#endif /* NID_brainpoolP512r1 */
- default:
- wpa_printf(MSG_INFO, "EAP-pwd: unsupported group %d", num);
- return -1;
- }
+ struct crypto_bignum *x_candidate = NULL, *rnd = NULL, *cofactor = NULL;
grp->pwe = NULL;
- grp->order = NULL;
- grp->prime = NULL;
-
- if ((grp->group = EC_GROUP_new_by_curve_name(nid)) == NULL) {
- wpa_printf(MSG_INFO, "EAP-pwd: unable to create EC_GROUP");
+ grp->group = crypto_ec_init(num);
+ if (!grp->group) {
+ wpa_printf(MSG_INFO, "EAP-pwd: unable to create EC group");
goto fail;
}
- if (((rnd = BN_new()) == NULL) ||
- ((cofactor = BN_new()) == NULL) ||
- ((grp->pwe = EC_POINT_new(grp->group)) == NULL) ||
- ((grp->order = BN_new()) == NULL) ||
- ((grp->prime = BN_new()) == NULL) ||
- ((x_candidate = BN_new()) == NULL)) {
+ cofactor = crypto_bignum_init();
+ grp->pwe = crypto_ec_point_init(grp->group);
+ if (!cofactor || !grp->pwe) {
wpa_printf(MSG_INFO, "EAP-pwd: unable to create bignums");
goto fail;
}
- if (!EC_GROUP_get_curve_GFp(grp->group, grp->prime, NULL, NULL, NULL))
- {
- wpa_printf(MSG_INFO, "EAP-pwd: unable to get prime for GFp "
- "curve");
- goto fail;
- }
- if (!EC_GROUP_get_order(grp->group, grp->order, NULL)) {
- wpa_printf(MSG_INFO, "EAP-pwd: unable to get order for curve");
- goto fail;
- }
- if (!EC_GROUP_get_cofactor(grp->group, cofactor, NULL)) {
+ if (crypto_ec_cofactor(grp->group, cofactor) < 0) {
wpa_printf(MSG_INFO, "EAP-pwd: unable to get cofactor for "
"curve");
goto fail;
}
- primebitlen = BN_num_bits(grp->prime);
- primebytelen = BN_num_bytes(grp->prime);
+ primebitlen = crypto_ec_prime_len_bits(grp->group);
+ primebytelen = crypto_ec_prime_len(grp->group);
if ((prfbuf = os_malloc(primebytelen)) == NULL) {
wpa_printf(MSG_INFO, "EAP-pwd: unable to malloc space for prf "
"buffer");
@@ -207,15 +149,25 @@ int compute_password_element(EAP_PWD_group *grp, u16 num,
eap_pwd_h_update(hash, &ctr, sizeof(ctr));
eap_pwd_h_final(hash, pwe_digest);
- BN_bin2bn(pwe_digest, SHA256_MAC_LEN, rnd);
-
+ crypto_bignum_deinit(rnd, 1);
+ rnd = crypto_bignum_init_set(pwe_digest, SHA256_MAC_LEN);
+ if (!rnd) {
+ wpa_printf(MSG_INFO, "EAP-pwd: unable to create rnd");
+ goto fail;
+ }
if (eap_pwd_kdf(pwe_digest, SHA256_MAC_LEN,
(u8 *) "EAP-pwd Hunting And Pecking",
os_strlen("EAP-pwd Hunting And Pecking"),
prfbuf, primebitlen) < 0)
goto fail;
- BN_bin2bn(prfbuf, primebytelen, x_candidate);
+ crypto_bignum_deinit(x_candidate, 1);
+ x_candidate = crypto_bignum_init_set(prfbuf, primebytelen);
+ if (!x_candidate) {
+ wpa_printf(MSG_INFO,
+ "EAP-pwd: unable to create x_candidate");
+ goto fail;
+ }
/*
* eap_pwd_kdf() returns a string of bits 0..primebitlen but
@@ -224,11 +176,14 @@ int compute_password_element(EAP_PWD_group *grp, u16 num,
* then excessive bits-- those _after_ primebitlen-- so now
* we have to shift right the amount we masked off.
*/
- if (primebitlen % 8)
- BN_rshift(x_candidate, x_candidate,
- (8 - (primebitlen % 8)));
+ if ((primebitlen % 8) &&
+ crypto_bignum_rshift(x_candidate,
+ (8 - (primebitlen % 8)),
+ x_candidate) < 0)
+ goto fail;
- if (BN_ucmp(x_candidate, grp->prime) >= 0)
+ if (crypto_bignum_cmp(x_candidate,
+ crypto_ec_get_prime(grp->group)) >= 0)
continue;
wpa_hexdump(MSG_DEBUG, "EAP-pwd: x_candidate",
@@ -238,40 +193,38 @@ int compute_password_element(EAP_PWD_group *grp, u16 num,
* need to unambiguously identify the solution, if there is
* one...
*/
- if (BN_is_odd(rnd))
- is_odd = 1;
- else
- is_odd = 0;
+ is_odd = crypto_bignum_is_odd(rnd);
/*
* solve the quadratic equation, if it's not solvable then we
* don't have a point
*/
- if (!EC_POINT_set_compressed_coordinates_GFp(grp->group,
- grp->pwe,
- x_candidate,
- is_odd, NULL))
+ if (crypto_ec_point_solve_y_coord(grp->group, grp->pwe,
+ x_candidate, is_odd) != 0) {
+ wpa_printf(MSG_INFO, "EAP-pwd: Could not solve for y");
continue;
+ }
/*
* If there's a solution to the equation then the point must be
* on the curve so why check again explicitly? OpenSSL code
* says this is required by X9.62. We're not X9.62 but it can't
* hurt just to be sure.
*/
- if (!EC_POINT_is_on_curve(grp->group, grp->pwe, NULL)) {
+ if (!crypto_ec_point_is_on_curve(grp->group, grp->pwe)) {
wpa_printf(MSG_INFO, "EAP-pwd: point is not on curve");
continue;
}
- if (BN_cmp(cofactor, BN_value_one())) {
+ if (!crypto_bignum_is_one(cofactor)) {
/* make sure the point is not in a small sub-group */
- if (!EC_POINT_mul(grp->group, grp->pwe, NULL, grp->pwe,
- cofactor, NULL)) {
+ if (crypto_ec_point_mul(grp->group, grp->pwe,
+ cofactor, grp->pwe) != 0) {
wpa_printf(MSG_INFO, "EAP-pwd: cannot "
"multiply generator by order");
continue;
}
- if (EC_POINT_is_at_infinity(grp->group, grp->pwe)) {
+ if (crypto_ec_point_is_at_infinity(grp->group,
+ grp->pwe)) {
wpa_printf(MSG_INFO, "EAP-pwd: point is at "
"infinity");
continue;
@@ -284,37 +237,38 @@ int compute_password_element(EAP_PWD_group *grp, u16 num,
grp->group_num = num;
if (0) {
fail:
- EC_GROUP_free(grp->group);
+ crypto_ec_deinit(grp->group);
grp->group = NULL;
- EC_POINT_clear_free(grp->pwe);
+ crypto_ec_point_deinit(grp->pwe, 1);
grp->pwe = NULL;
- BN_clear_free(grp->order);
- grp->order = NULL;
- BN_clear_free(grp->prime);
- grp->prime = NULL;
ret = 1;
}
/* cleanliness and order.... */
- BN_clear_free(cofactor);
- BN_clear_free(x_candidate);
- BN_clear_free(rnd);
+ crypto_bignum_deinit(cofactor, 1);
+ crypto_bignum_deinit(x_candidate, 1);
+ crypto_bignum_deinit(rnd, 1);
os_free(prfbuf);
return ret;
}
-int compute_keys(EAP_PWD_group *grp, BN_CTX *bnctx, const BIGNUM *k,
- const BIGNUM *peer_scalar, const BIGNUM *server_scalar,
+int compute_keys(EAP_PWD_group *grp, const struct crypto_bignum *k,
+ const struct crypto_bignum *peer_scalar,
+ const struct crypto_bignum *server_scalar,
const u8 *confirm_peer, const u8 *confirm_server,
const u32 *ciphersuite, u8 *msk, u8 *emsk, u8 *session_id)
{
struct crypto_hash *hash;
u8 mk[SHA256_MAC_LEN], *cruft;
u8 msk_emsk[EAP_MSK_LEN + EAP_EMSK_LEN];
- int offset;
+ size_t prime_len, order_len;
+
+ prime_len = crypto_ec_prime_len(grp->group);
+ order_len = crypto_ec_order_len(grp->group);
- if ((cruft = os_malloc(BN_num_bytes(grp->prime))) == NULL)
+ cruft = os_malloc(prime_len);
+ if (!cruft)
return -1;
/*
@@ -328,14 +282,10 @@ int compute_keys(EAP_PWD_group *grp, BN_CTX *bnctx, const BIGNUM *k,
return -1;
}
eap_pwd_h_update(hash, (const u8 *) ciphersuite, sizeof(u32));
- offset = BN_num_bytes(grp->order) - BN_num_bytes(peer_scalar);
- os_memset(cruft, 0, BN_num_bytes(grp->prime));
- BN_bn2bin(peer_scalar, cruft + offset);
- eap_pwd_h_update(hash, cruft, BN_num_bytes(grp->order));
- offset = BN_num_bytes(grp->order) - BN_num_bytes(server_scalar);
- os_memset(cruft, 0, BN_num_bytes(grp->prime));
- BN_bn2bin(server_scalar, cruft + offset);
- eap_pwd_h_update(hash, cruft, BN_num_bytes(grp->order));
+ crypto_bignum_to_bin(peer_scalar, cruft, order_len, order_len);
+ eap_pwd_h_update(hash, cruft, order_len);
+ crypto_bignum_to_bin(server_scalar, cruft, order_len, order_len);
+ eap_pwd_h_update(hash, cruft, order_len);
eap_pwd_h_final(hash, &session_id[1]);
/* then compute MK = H(k | confirm-peer | confirm-server) */
@@ -344,10 +294,8 @@ int compute_keys(EAP_PWD_group *grp, BN_CTX *bnctx, const BIGNUM *k,
os_free(cruft);
return -1;
}
- offset = BN_num_bytes(grp->prime) - BN_num_bytes(k);
- os_memset(cruft, 0, BN_num_bytes(grp->prime));
- BN_bn2bin(k, cruft + offset);
- eap_pwd_h_update(hash, cruft, BN_num_bytes(grp->prime));
+ crypto_bignum_to_bin(k, cruft, prime_len, prime_len);
+ eap_pwd_h_update(hash, cruft, prime_len);
os_free(cruft);
eap_pwd_h_update(hash, confirm_peer, SHA256_MAC_LEN);
eap_pwd_h_update(hash, confirm_server, SHA256_MAC_LEN);
diff --git a/src/eap_common/eap_pwd_common.h b/src/eap_common/eap_pwd_common.h
index a0d717e..7ac7b6a 100644
--- a/src/eap_common/eap_pwd_common.h
+++ b/src/eap_common/eap_pwd_common.h
@@ -9,20 +9,14 @@
#ifndef EAP_PWD_COMMON_H
#define EAP_PWD_COMMON_H
-#include <openssl/bn.h>
-#include <openssl/ec.h>
-#include <openssl/evp.h>
-
/*
* definition of a finite cyclic group
* TODO: support one based on a prime field
*/
typedef struct group_definition_ {
u16 group_num;
- EC_GROUP *group;
- EC_POINT *pwe;
- BIGNUM *order;
- BIGNUM *prime;
+ struct crypto_ec *group;
+ struct crypto_ec_point *pwe;
} EAP_PWD_group;
/*
@@ -61,8 +55,9 @@ int compute_password_element(EAP_PWD_group *grp, u16 num,
const u8 *id_server, size_t id_server_len,
const u8 *id_peer, size_t id_peer_len,
const u8 *token);
-int compute_keys(EAP_PWD_group *grp, BN_CTX *bnctx, const BIGNUM *k,
- const BIGNUM *peer_scalar, const BIGNUM *server_scalar,
+int compute_keys(EAP_PWD_group *grp, const struct crypto_bignum *k,
+ const struct crypto_bignum *peer_scalar,
+ const struct crypto_bignum *server_scalar,
const u8 *confirm_peer, const u8 *confirm_server,
const u32 *ciphersuite, u8 *msk, u8 *emsk, u8 *session_id);
struct crypto_hash * eap_pwd_h_init(void);
diff --git a/src/eap_peer/eap_pwd.c b/src/eap_peer/eap_pwd.c
index ec277ac..d62defe 100644
--- a/src/eap_peer/eap_pwd.c
+++ b/src/eap_peer/eap_pwd.c
@@ -11,6 +11,7 @@
#include "common.h"
#include "crypto/sha256.h"
#include "crypto/ms_funcs.h"
+#include "crypto/crypto.h"
#include "eap_peer/eap_i.h"
#include "eap_common/eap_pwd_common.h"
@@ -36,18 +37,16 @@ struct eap_pwd_data {
size_t out_frag_pos;
size_t mtu;
- BIGNUM *k;
- BIGNUM *private_value;
- BIGNUM *server_scalar;
- BIGNUM *my_scalar;
- EC_POINT *my_element;
- EC_POINT *server_element;
+ struct crypto_bignum *k;
+ struct crypto_bignum *private_value;
+ struct crypto_bignum *server_scalar;
+ struct crypto_bignum *my_scalar;
+ struct crypto_ec_point *my_element;
+ struct crypto_ec_point *server_element;
u8 msk[EAP_MSK_LEN];
u8 emsk[EAP_EMSK_LEN];
u8 session_id[1 + SHA256_MAC_LEN];
-
- BN_CTX *bnctx;
};
@@ -107,15 +106,8 @@ static void * eap_pwd_init(struct eap_sm *sm)
return NULL;
}
- if ((data->bnctx = BN_CTX_new()) == NULL) {
- wpa_printf(MSG_INFO, "EAP-PWD: bn context allocation fail");
- os_free(data);
- return NULL;
- }
-
if ((data->id_peer = os_malloc(identity_len)) == NULL) {
wpa_printf(MSG_INFO, "EAP-PWD: memory allocation id fail");
- BN_CTX_free(data->bnctx);
os_free(data);
return NULL;
}
@@ -125,7 +117,6 @@ static void * eap_pwd_init(struct eap_sm *sm)
if ((data->password = os_malloc(password_len)) == NULL) {
wpa_printf(MSG_INFO, "EAP-PWD: memory allocation psk fail");
- BN_CTX_free(data->bnctx);
bin_clear_free(data->id_peer, data->id_peer_len);
os_free(data);
return NULL;
@@ -152,21 +143,18 @@ static void eap_pwd_deinit(struct eap_sm *sm, void *priv)
{
struct eap_pwd_data *data = priv;
- BN_clear_free(data->private_value);
- BN_clear_free(data->server_scalar);
- BN_clear_free(data->my_scalar);
- BN_clear_free(data->k);
- BN_CTX_free(data->bnctx);
- EC_POINT_clear_free(data->my_element);
- EC_POINT_clear_free(data->server_element);
+ crypto_bignum_deinit(data->private_value, 1);
+ crypto_bignum_deinit(data->server_scalar, 1);
+ crypto_bignum_deinit(data->my_scalar, 1);
+ crypto_bignum_deinit(data->k, 1);
+ crypto_ec_point_deinit(data->my_element, 1);
+ crypto_ec_point_deinit(data->server_element, 1);
bin_clear_free(data->id_peer, data->id_peer_len);
bin_clear_free(data->id_server, data->id_server_len);
bin_clear_free(data->password, data->password_len);
if (data->grp) {
- EC_GROUP_free(data->grp->group);
- EC_POINT_clear_free(data->grp->pwe);
- BN_clear_free(data->grp->order);
- BN_clear_free(data->grp->prime);
+ crypto_ec_deinit(data->grp->group);
+ crypto_ec_point_deinit(data->grp->pwe, 1);
os_free(data->grp);
}
wpabuf_free(data->inbuf);
@@ -331,7 +319,7 @@ eap_pwd_perform_id_exchange(struct eap_sm *sm, struct eap_pwd_data *data,
}
wpa_printf(MSG_DEBUG, "EAP-PWD (peer): computed %d bit PWE...",
- BN_num_bits(data->grp->prime));
+ (int) crypto_ec_prime_len_bits(data->grp->group));
data->outbuf = wpabuf_alloc(sizeof(struct eap_pwd_id) +
data->id_peer_len);
@@ -356,10 +344,10 @@ eap_pwd_perform_commit_exchange(struct eap_sm *sm, struct eap_pwd_data *data,
const struct wpabuf *reqData,
const u8 *payload, size_t payload_len)
{
- EC_POINT *K = NULL, *point = NULL;
- BIGNUM *mask = NULL, *x = NULL, *y = NULL, *cofactor = NULL;
- u16 offset;
- u8 *ptr, *scalar = NULL, *element = NULL;
+ struct crypto_ec_point *K = NULL, *point = NULL;
+ struct crypto_bignum *mask = NULL, *cofactor = NULL;
+ const u8 *ptr;
+ u8 *scalar = NULL, *element = NULL;
size_t prime_len, order_len;
if (data->state != PWD_Commit_Req) {
@@ -367,8 +355,8 @@ eap_pwd_perform_commit_exchange(struct eap_sm *sm, struct eap_pwd_data *data,
goto fin;
}
- prime_len = BN_num_bytes(data->grp->prime);
- order_len = BN_num_bytes(data->grp->order);
+ prime_len = crypto_ec_prime_len(data->grp->group);
+ order_len = crypto_ec_order_len(data->grp->group);
if (payload_len != 2 * prime_len + order_len) {
wpa_printf(MSG_INFO,
@@ -378,87 +366,85 @@ eap_pwd_perform_commit_exchange(struct eap_sm *sm, struct eap_pwd_data *data,
goto fin;
}
- if (((data->private_value = BN_new()) == NULL) ||
- ((data->my_element = EC_POINT_new(data->grp->group)) == NULL) ||
- ((cofactor = BN_new()) == NULL) ||
- ((data->my_scalar = BN_new()) == NULL) ||
- ((mask = BN_new()) == NULL)) {
+ data->private_value = crypto_bignum_init();
+ data->my_element = crypto_ec_point_init(data->grp->group);
+ cofactor = crypto_bignum_init();
+ data->my_scalar = crypto_bignum_init();
+ mask = crypto_bignum_init();
+ if (!data->private_value || !data->my_element || !cofactor ||
+ !data->my_scalar || !mask) {
wpa_printf(MSG_INFO, "EAP-PWD (peer): scalar allocation fail");
goto fin;
}
- if (!EC_GROUP_get_cofactor(data->grp->group, cofactor, NULL)) {
+ if (crypto_ec_cofactor(data->grp->group, cofactor) < 0) {
wpa_printf(MSG_INFO, "EAP-pwd (peer): unable to get cofactor "
"for curve");
goto fin;
}
- if (BN_rand_range(data->private_value, data->grp->order) != 1 ||
- BN_rand_range(mask, data->grp->order) != 1 ||
- BN_add(data->my_scalar, data->private_value, mask) != 1 ||
- BN_mod(data->my_scalar, data->my_scalar, data->grp->order,
- data->bnctx) != 1) {
+ if (crypto_bignum_rand(data->private_value,
+ crypto_ec_get_order(data->grp->group)) < 0 ||
+ crypto_bignum_rand(mask,
+ crypto_ec_get_order(data->grp->group)) < 0 ||
+ crypto_bignum_add(data->private_value, mask,
+ data->my_scalar) < 0 ||
+ crypto_bignum_mod(data->my_scalar,
+ crypto_ec_get_order(data->grp->group),
+ data->my_scalar) < 0) {
wpa_printf(MSG_INFO,
"EAP-pwd (peer): unable to get randomness");
goto fin;
}
- if (!EC_POINT_mul(data->grp->group, data->my_element, NULL,
- data->grp->pwe, mask, data->bnctx)) {
+ if (crypto_ec_point_mul(data->grp->group, data->grp->pwe, mask,
+ data->my_element) < 0) {
wpa_printf(MSG_INFO, "EAP-PWD (peer): element allocation "
"fail");
eap_pwd_state(data, FAILURE);
goto fin;
}
- if (!EC_POINT_invert(data->grp->group, data->my_element, data->bnctx))
- {
+ if (crypto_ec_point_invert(data->grp->group, data->my_element) < 0) {
wpa_printf(MSG_INFO, "EAP-PWD (peer): element inversion fail");
goto fin;
}
- if (((x = BN_new()) == NULL) ||
- ((y = BN_new()) == NULL)) {
- wpa_printf(MSG_INFO, "EAP-PWD (peer): point allocation fail");
- goto fin;
- }
-
/* process the request */
- if (((data->server_scalar = BN_new()) == NULL) ||
- ((data->k = BN_new()) == NULL) ||
- ((K = EC_POINT_new(data->grp->group)) == NULL) ||
- ((point = EC_POINT_new(data->grp->group)) == NULL) ||
- ((data->server_element = EC_POINT_new(data->grp->group)) == NULL))
- {
+ data->k = crypto_bignum_init();
+ K = crypto_ec_point_init(data->grp->group);
+ point = crypto_ec_point_init(data->grp->group);
+ if (!data->k || !K || !point) {
wpa_printf(MSG_INFO, "EAP-PWD (peer): peer data allocation "
"fail");
goto fin;
}
/* element, x then y, followed by scalar */
- ptr = (u8 *) payload;
- BN_bin2bn(ptr, BN_num_bytes(data->grp->prime), x);
- ptr += BN_num_bytes(data->grp->prime);
- BN_bin2bn(ptr, BN_num_bytes(data->grp->prime), y);
- ptr += BN_num_bytes(data->grp->prime);
- BN_bin2bn(ptr, BN_num_bytes(data->grp->order), data->server_scalar);
- if (!EC_POINT_set_affine_coordinates_GFp(data->grp->group,
- data->server_element, x, y,
- data->bnctx)) {
+ ptr = payload;
+ data->server_element = crypto_ec_point_from_bin(data->grp->group, ptr);
+ if (!data->server_element) {
wpa_printf(MSG_INFO, "EAP-PWD (peer): setting peer element "
"fail");
goto fin;
}
+ ptr += prime_len * 2;
+ data->server_scalar = crypto_bignum_init_set(ptr, order_len);
+ if (!data->server_scalar) {
+ wpa_printf(MSG_INFO,
+ "EAP-PWD (peer): setting peer scalar fail");
+ goto fin;
+ }
/* check to ensure server's element is not in a small sub-group */
- if (BN_cmp(cofactor, BN_value_one())) {
- if (!EC_POINT_mul(data->grp->group, point, NULL,
- data->server_element, cofactor, NULL)) {
+ if (!crypto_bignum_is_one(cofactor)) {
+ if (crypto_ec_point_mul(data->grp->group, data->server_element,
+ cofactor, point) < 0) {
wpa_printf(MSG_INFO, "EAP-PWD (peer): cannot multiply "
"server element by order!\n");
goto fin;
}
- if (EC_POINT_is_at_infinity(data->grp->group, point)) {
+ if (crypto_ec_point_is_at_infinity(data->grp->group, point)) {
wpa_printf(MSG_INFO, "EAP-PWD (peer): server element "
"is at infinity!\n");
goto fin;
@@ -466,21 +452,20 @@ eap_pwd_perform_commit_exchange(struct eap_sm *sm, struct eap_pwd_data *data,
}
/* compute the shared key, k */
- if ((!EC_POINT_mul(data->grp->group, K, NULL, data->grp->pwe,
- data->server_scalar, data->bnctx)) ||
- (!EC_POINT_add(data->grp->group, K, K, data->server_element,
- data->bnctx)) ||
- (!EC_POINT_mul(data->grp->group, K, NULL, K, data->private_value,
- data->bnctx))) {
+ if (crypto_ec_point_mul(data->grp->group, data->grp->pwe,
+ data->server_scalar, K) < 0 ||
+ crypto_ec_point_add(data->grp->group, K, data->server_element,
+ K) < 0 ||
+ crypto_ec_point_mul(data->grp->group, K, data->private_value,
+ K) < 0) {
wpa_printf(MSG_INFO, "EAP-PWD (peer): computing shared key "
"fail");
goto fin;
}
/* ensure that the shared key isn't in a small sub-group */
- if (BN_cmp(cofactor, BN_value_one())) {
- if (!EC_POINT_mul(data->grp->group, K, NULL, K, cofactor,
- NULL)) {
+ if (!crypto_bignum_is_one(cofactor)) {
+ if (crypto_ec_point_mul(data->grp->group, K, cofactor, K) < 0) {
wpa_printf(MSG_INFO, "EAP-PWD (peer): cannot multiply "
"shared key point by order");
goto fin;
@@ -493,30 +478,22 @@ eap_pwd_perform_commit_exchange(struct eap_sm *sm, struct eap_pwd_data *data,
* never going to happen it is a simple and safe check "just to be
* sure" so let's be safe.
*/
- if (EC_POINT_is_at_infinity(data->grp->group, K)) {
+ if (crypto_ec_point_is_at_infinity(data->grp->group, K)) {
wpa_printf(MSG_INFO, "EAP-PWD (peer): shared key point is at "
"infinity!\n");
goto fin;
}
- if (!EC_POINT_get_affine_coordinates_GFp(data->grp->group, K, data->k,
- NULL, data->bnctx)) {
+ if (crypto_ec_point_x(data->grp->group, K, data->k) < 0) {
wpa_printf(MSG_INFO, "EAP-PWD (peer): unable to extract "
"shared secret from point");
goto fin;
}
/* now do the response */
- if (!EC_POINT_get_affine_coordinates_GFp(data->grp->group,
- data->my_element, x, y,
- data->bnctx)) {
- wpa_printf(MSG_INFO, "EAP-PWD (peer): point assignment fail");
- goto fin;
- }
-
- if (((scalar = os_malloc(BN_num_bytes(data->grp->order))) == NULL) ||
- ((element = os_malloc(BN_num_bytes(data->grp->prime) * 2)) ==
- NULL)) {
+ scalar = os_zalloc(order_len);
+ element = os_zalloc(prime_len * 2);
+ if (!scalar || !element) {
wpa_printf(MSG_INFO, "EAP-PWD (peer): data allocation fail");
goto fin;
}
@@ -526,36 +503,28 @@ eap_pwd_perform_commit_exchange(struct eap_sm *sm, struct eap_pwd_data *data,
* sufficiently smaller than the prime or order might need pre-pending
* with zeros.
*/
- os_memset(scalar, 0, BN_num_bytes(data->grp->order));
- os_memset(element, 0, BN_num_bytes(data->grp->prime) * 2);
- offset = BN_num_bytes(data->grp->order) -
- BN_num_bytes(data->my_scalar);
- BN_bn2bin(data->my_scalar, scalar + offset);
-
- offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(x);
- BN_bn2bin(x, element + offset);
- offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(y);
- BN_bn2bin(y, element + BN_num_bytes(data->grp->prime) + offset);
-
- data->outbuf = wpabuf_alloc(BN_num_bytes(data->grp->order) +
- 2 * BN_num_bytes(data->grp->prime));
+ crypto_bignum_to_bin(data->my_scalar, scalar, order_len, order_len);
+ if (crypto_ec_point_to_bin(data->grp->group, data->my_element, element,
+ element + prime_len) != 0) {
+ wpa_printf(MSG_INFO, "EAP-PWD (peer): point assignment fail");
+ goto fin;
+ }
+
+ data->outbuf = wpabuf_alloc(order_len + 2 * prime_len);
if (data->outbuf == NULL)
goto fin;
/* we send the element as (x,y) follwed by the scalar */
- wpabuf_put_data(data->outbuf, element,
- 2 * BN_num_bytes(data->grp->prime));
- wpabuf_put_data(data->outbuf, scalar, BN_num_bytes(data->grp->order));
+ wpabuf_put_data(data->outbuf, element, 2 * prime_len);
+ wpabuf_put_data(data->outbuf, scalar, order_len);
fin:
os_free(scalar);
os_free(element);
- BN_clear_free(x);
- BN_clear_free(y);
- BN_clear_free(mask);
- BN_clear_free(cofactor);
- EC_POINT_clear_free(K);
- EC_POINT_clear_free(point);
+ crypto_bignum_deinit(mask, 1);
+ crypto_bignum_deinit(cofactor, 1);
+ crypto_ec_point_deinit(K, 1);
+ crypto_ec_point_deinit(point, 1);
if (data->outbuf == NULL)
eap_pwd_state(data, FAILURE);
else
@@ -569,12 +538,11 @@ eap_pwd_perform_confirm_exchange(struct eap_sm *sm, struct eap_pwd_data *data,
const struct wpabuf *reqData,
const u8 *payload, size_t payload_len)
{
- BIGNUM *x = NULL, *y = NULL;
struct crypto_hash *hash;
u32 cs;
u16 grp;
u8 conf[SHA256_MAC_LEN], *cruft = NULL, *ptr;
- int offset;
+ size_t prime_len = 0, order_len = 0;
if (data->state != PWD_Confirm_Req) {
ret->ignore = TRUE;
@@ -588,6 +556,9 @@ eap_pwd_perform_confirm_exchange(struct eap_sm *sm, struct eap_pwd_data *data,
goto fin;
}
+ prime_len = crypto_ec_prime_len(data->grp->group);
+ order_len = crypto_ec_order_len(data->grp->group);
+
/*
* first build up the ciphersuite which is group | random_function |
* prf
@@ -600,9 +571,9 @@ eap_pwd_perform_confirm_exchange(struct eap_sm *sm, struct eap_pwd_data *data,
ptr += sizeof(u8);
*ptr = EAP_PWD_DEFAULT_PRF;
- /* each component of the cruft will be at most as big as the prime */
- if (((cruft = os_malloc(BN_num_bytes(data->grp->prime))) == NULL) ||
- ((x = BN_new()) == NULL) || ((y = BN_new()) == NULL)) {
+ /* each component of the point will be at most as big as the prime */
+ cruft = os_malloc(prime_len * 2);
+ if (!cruft) {
wpa_printf(MSG_INFO, "EAP-PWD (server): confirm allocation "
"fail");
goto fin;
@@ -620,59 +591,34 @@ eap_pwd_perform_confirm_exchange(struct eap_sm *sm, struct eap_pwd_data *data,
* zero the memory each time because this is mod prime math and some
* value may start with a few zeros and the previous one did not.
*/
- os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
- offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(data->k);
- BN_bn2bin(data->k, cruft + offset);
- eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime));
+ crypto_bignum_to_bin(data->k, cruft, prime_len, prime_len);
+ eap_pwd_h_update(hash, cruft, prime_len);
/* server element: x, y */
- if (!EC_POINT_get_affine_coordinates_GFp(data->grp->group,
- data->server_element, x, y,
- data->bnctx)) {
+ if (crypto_ec_point_to_bin(data->grp->group, data->server_element,
+ cruft, cruft + prime_len) != 0) {
wpa_printf(MSG_INFO, "EAP-PWD (server): confirm point "
"assignment fail");
goto fin;
}
- os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
- offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(x);
- BN_bn2bin(x, cruft + offset);
- eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime));
- os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
- offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(y);
- BN_bn2bin(y, cruft + offset);
- eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime));
+ eap_pwd_h_update(hash, cruft, prime_len * 2);
/* server scalar */
- os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
- offset = BN_num_bytes(data->grp->order) -
- BN_num_bytes(data->server_scalar);
- BN_bn2bin(data->server_scalar, cruft + offset);
- eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->order));
+ crypto_bignum_to_bin(data->server_scalar, cruft, order_len, order_len);
+ eap_pwd_h_update(hash, cruft, order_len);
/* my element: x, y */
- if (!EC_POINT_get_affine_coordinates_GFp(data->grp->group,
- data->my_element, x, y,
- data->bnctx)) {
+ if (crypto_ec_point_to_bin(data->grp->group, data->my_element, cruft,
+ cruft + prime_len) != 0) {
wpa_printf(MSG_INFO, "EAP-PWD (server): confirm point "
"assignment fail");
goto fin;
}
-
- os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
- offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(x);
- BN_bn2bin(x, cruft + offset);
- eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime));
- os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
- offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(y);
- BN_bn2bin(y, cruft + offset);
- eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime));
+ eap_pwd_h_update(hash, cruft, prime_len * 2);
/* my scalar */
- os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
- offset = BN_num_bytes(data->grp->order) -
- BN_num_bytes(data->my_scalar);
- BN_bn2bin(data->my_scalar, cruft + offset);
- eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->order));
+ crypto_bignum_to_bin(data->my_scalar, cruft, order_len, order_len);
+ eap_pwd_h_update(hash, cruft, order_len);
/* the ciphersuite */
eap_pwd_h_update(hash, (u8 *) &cs, sizeof(u32));
@@ -698,58 +644,34 @@ eap_pwd_perform_confirm_exchange(struct eap_sm *sm, struct eap_pwd_data *data,
goto fin;
/* k */
- os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
- offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(data->k);
- BN_bn2bin(data->k, cruft + offset);
- eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime));
+ crypto_bignum_to_bin(data->k, cruft, prime_len, prime_len);
+ eap_pwd_h_update(hash, cruft, prime_len);
/* my element */
- if (!EC_POINT_get_affine_coordinates_GFp(data->grp->group,
- data->my_element, x, y,
- data->bnctx)) {
+ if (crypto_ec_point_to_bin(data->grp->group, data->my_element, cruft,
+ cruft + prime_len) != 0) {
wpa_printf(MSG_INFO, "EAP-PWD (peer): confirm point "
"assignment fail");
goto fin;
}
- os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
- offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(x);
- BN_bn2bin(x, cruft + offset);
- eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime));
- os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
- offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(y);
- BN_bn2bin(y, cruft + offset);
- eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime));
+ eap_pwd_h_update(hash, cruft, prime_len * 2);
/* my scalar */
- os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
- offset = BN_num_bytes(data->grp->order) -
- BN_num_bytes(data->my_scalar);
- BN_bn2bin(data->my_scalar, cruft + offset);
- eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->order));
+ crypto_bignum_to_bin(data->my_scalar, cruft, order_len, order_len);
+ eap_pwd_h_update(hash, cruft, order_len);
/* server element: x, y */
- if (!EC_POINT_get_affine_coordinates_GFp(data->grp->group,
- data->server_element, x, y,
- data->bnctx)) {
+ if (crypto_ec_point_to_bin(data->grp->group, data->server_element,
+ cruft, cruft + prime_len) != 0) {
wpa_printf(MSG_INFO, "EAP-PWD (peer): confirm point "
"assignment fail");
goto fin;
}
- os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
- offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(x);
- BN_bn2bin(x, cruft + offset);
- eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime));
- os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
- offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(y);
- BN_bn2bin(y, cruft + offset);
- eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime));
+ eap_pwd_h_update(hash, cruft, prime_len * 2);
/* server scalar */
- os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
- offset = BN_num_bytes(data->grp->order) -
- BN_num_bytes(data->server_scalar);
- BN_bn2bin(data->server_scalar, cruft + offset);
- eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->order));
+ crypto_bignum_to_bin(data->server_scalar, cruft, order_len, order_len);
+ eap_pwd_h_update(hash, cruft, order_len);
/* the ciphersuite */
eap_pwd_h_update(hash, (u8 *) &cs, sizeof(u32));
@@ -757,7 +679,7 @@ eap_pwd_perform_confirm_exchange(struct eap_sm *sm, struct eap_pwd_data *data,
/* all done */
eap_pwd_h_final(hash, conf);
- if (compute_keys(data->grp, data->bnctx, data->k,
+ if (compute_keys(data->grp, data->k,
data->my_scalar, data->server_scalar, conf, ptr,
&cs, data->msk, data->emsk, data->session_id) < 0) {
wpa_printf(MSG_INFO, "EAP-PWD (peer): unable to compute MSK | "
@@ -772,10 +694,7 @@ eap_pwd_perform_confirm_exchange(struct eap_sm *sm, struct eap_pwd_data *data,
wpabuf_put_data(data->outbuf, conf, SHA256_MAC_LEN);
fin:
- if (data->grp)
- bin_clear_free(cruft, BN_num_bytes(data->grp->prime));
- BN_clear_free(x);
- BN_clear_free(y);
+ bin_clear_free(cruft, prime_len * 2);
if (data->outbuf == NULL) {
ret->methodState = METHOD_DONE;
ret->decision = DECISION_FAIL;
diff --git a/src/eap_server/eap_server_pwd.c b/src/eap_server/eap_server_pwd.c
index 9dca7d0..835ea09 100644
--- a/src/eap_server/eap_server_pwd.c
+++ b/src/eap_server/eap_server_pwd.c
@@ -11,6 +11,7 @@
#include "common.h"
#include "crypto/sha256.h"
#include "crypto/ms_funcs.h"
+#include "crypto/crypto.h"
#include "eap_server/eap_i.h"
#include "eap_common/eap_pwd_common.h"
@@ -36,20 +37,18 @@ struct eap_pwd_data {
size_t out_frag_pos;
size_t mtu;
- BIGNUM *k;
- BIGNUM *private_value;
- BIGNUM *peer_scalar;
- BIGNUM *my_scalar;
- EC_POINT *my_element;
- EC_POINT *peer_element;
+ struct crypto_bignum *k;
+ struct crypto_bignum *private_value;
+ struct crypto_bignum *peer_scalar;
+ struct crypto_bignum *my_scalar;
+ struct crypto_ec_point *my_element;
+ struct crypto_ec_point *peer_element;
u8 my_confirm[SHA256_MAC_LEN];
u8 msk[EAP_MSK_LEN];
u8 emsk[EAP_EMSK_LEN];
u8 session_id[1 + SHA256_MAC_LEN];
-
- BN_CTX *bnctx;
};
@@ -116,15 +115,6 @@ static void * eap_pwd_init(struct eap_sm *sm)
os_memcpy(data->password, sm->user->password, data->password_len);
data->password_hash = sm->user->password_hash;
- data->bnctx = BN_CTX_new();
- if (data->bnctx == NULL) {
- wpa_printf(MSG_INFO, "EAP-PWD: bn context allocation fail");
- bin_clear_free(data->password, data->password_len);
- bin_clear_free(data->id_server, data->id_server_len);
- os_free(data);
- return NULL;
- }
-
data->in_frag_pos = data->out_frag_pos = 0;
data->inbuf = data->outbuf = NULL;
/* use default MTU from RFC 5931 if not configured otherwise */
@@ -138,21 +128,18 @@ static void eap_pwd_reset(struct eap_sm *sm, void *priv)
{
struct eap_pwd_data *data = priv;
- BN_clear_free(data->private_value);
- BN_clear_free(data->peer_scalar);
- BN_clear_free(data->my_scalar);
- BN_clear_free(data->k);
- BN_CTX_free(data->bnctx);
- EC_POINT_clear_free(data->my_element);
- EC_POINT_clear_free(data->peer_element);
+ crypto_bignum_deinit(data->private_value, 1);
+ crypto_bignum_deinit(data->peer_scalar, 1);
+ crypto_bignum_deinit(data->my_scalar, 1);
+ crypto_bignum_deinit(data->k, 1);
+ crypto_ec_point_deinit(data->my_element, 1);
+ crypto_ec_point_deinit(data->peer_element, 1);
bin_clear_free(data->id_peer, data->id_peer_len);
bin_clear_free(data->id_server, data->id_server_len);
bin_clear_free(data->password, data->password_len);
if (data->grp) {
- EC_GROUP_free(data->grp->group);
- EC_POINT_clear_free(data->grp->pwe);
- BN_clear_free(data->grp->order);
- BN_clear_free(data->grp->prime);
+ crypto_ec_deinit(data->grp->group);
+ crypto_ec_point_deinit(data->grp->pwe, 1);
os_free(data->grp);
}
wpabuf_free(data->inbuf);
@@ -198,9 +185,9 @@ static void eap_pwd_build_id_req(struct eap_sm *sm, struct eap_pwd_data *data,
static void eap_pwd_build_commit_req(struct eap_sm *sm,
struct eap_pwd_data *data, u8 id)
{
- BIGNUM *mask = NULL, *x = NULL, *y = NULL;
+ struct crypto_bignum *mask = NULL;
u8 *scalar = NULL, *element = NULL;
- u16 offset;
+ size_t prime_len, order_len;
wpa_printf(MSG_DEBUG, "EAP-pwd: Commit/Request");
/*
@@ -210,93 +197,75 @@ static void eap_pwd_build_commit_req(struct eap_sm *sm,
if (data->out_frag_pos)
return;
- if (((data->private_value = BN_new()) == NULL) ||
- ((data->my_element = EC_POINT_new(data->grp->group)) == NULL) ||
- ((data->my_scalar = BN_new()) == NULL) ||
- ((mask = BN_new()) == NULL)) {
+ prime_len = crypto_ec_prime_len(data->grp->group);
+ order_len = crypto_ec_order_len(data->grp->group);
+
+ data->private_value = crypto_bignum_init();
+ data->my_element = crypto_ec_point_init(data->grp->group);
+ data->my_scalar = crypto_bignum_init();
+ mask = crypto_bignum_init();
+ if (!data->private_value || !data->my_element || !data->my_scalar ||
+ !mask) {
wpa_printf(MSG_INFO, "EAP-PWD (server): scalar allocation "
"fail");
goto fin;
}
- if (BN_rand_range(data->private_value, data->grp->order) != 1 ||
- BN_rand_range(mask, data->grp->order) != 1 ||
- BN_add(data->my_scalar, data->private_value, mask) != 1 ||
- BN_mod(data->my_scalar, data->my_scalar, data->grp->order,
- data->bnctx) != 1) {
+ if (crypto_bignum_rand(data->private_value,
+ crypto_ec_get_order(data->grp->group)) < 0 ||
+ crypto_bignum_rand(mask,
+ crypto_ec_get_order(data->grp->group)) < 0 ||
+ crypto_bignum_add(data->private_value, mask, data->my_scalar) < 0 ||
+ crypto_bignum_mod(data->my_scalar,
+ crypto_ec_get_order(data->grp->group),
+ data->my_scalar) < 0) {
wpa_printf(MSG_INFO,
"EAP-pwd (server): unable to get randomness");
goto fin;
}
- if (!EC_POINT_mul(data->grp->group, data->my_element, NULL,
- data->grp->pwe, mask, data->bnctx)) {
+ if (crypto_ec_point_mul(data->grp->group, data->grp->pwe, mask,
+ data->my_element) < 0) {
wpa_printf(MSG_INFO, "EAP-PWD (server): element allocation "
"fail");
eap_pwd_state(data, FAILURE);
goto fin;
}
- if (!EC_POINT_invert(data->grp->group, data->my_element, data->bnctx))
- {
+ if (crypto_ec_point_invert(data->grp->group, data->my_element) < 0) {
wpa_printf(MSG_INFO, "EAP-PWD (server): element inversion "
"fail");
goto fin;
}
- BN_clear_free(mask);
- if (((x = BN_new()) == NULL) ||
- ((y = BN_new()) == NULL)) {
- wpa_printf(MSG_INFO, "EAP-PWD (server): point allocation "
- "fail");
+ scalar = os_malloc(order_len);
+ element = os_malloc(prime_len * 2);
+ if (!scalar || !element) {
+ wpa_printf(MSG_INFO, "EAP-PWD (server): data allocation fail");
goto fin;
}
- if (!EC_POINT_get_affine_coordinates_GFp(data->grp->group,
- data->my_element, x, y,
- data->bnctx)) {
+
+ if (crypto_ec_point_to_bin(data->grp->group, data->my_element, element,
+ element + prime_len) < 0) {
wpa_printf(MSG_INFO, "EAP-PWD (server): point assignment "
"fail");
goto fin;
}
- if (((scalar = os_malloc(BN_num_bytes(data->grp->order))) == NULL) ||
- ((element = os_malloc(BN_num_bytes(data->grp->prime) * 2)) ==
- NULL)) {
- wpa_printf(MSG_INFO, "EAP-PWD (server): data allocation fail");
- goto fin;
- }
+ crypto_bignum_to_bin(data->my_scalar, scalar, order_len, order_len);
- /*
- * bignums occupy as little memory as possible so one that is
- * sufficiently smaller than the prime or order might need pre-pending
- * with zeros.
- */
- os_memset(scalar, 0, BN_num_bytes(data->grp->order));
- os_memset(element, 0, BN_num_bytes(data->grp->prime) * 2);
- offset = BN_num_bytes(data->grp->order) -
- BN_num_bytes(data->my_scalar);
- BN_bn2bin(data->my_scalar, scalar + offset);
-
- offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(x);
- BN_bn2bin(x, element + offset);
- offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(y);
- BN_bn2bin(y, element + BN_num_bytes(data->grp->prime) + offset);
-
- data->outbuf = wpabuf_alloc(2 * BN_num_bytes(data->grp->prime) +
- BN_num_bytes(data->grp->order));
+ data->outbuf = wpabuf_alloc(2 * prime_len + order_len);
if (data->outbuf == NULL)
goto fin;
/* We send the element as (x,y) followed by the scalar */
- wpabuf_put_data(data->outbuf, element,
- 2 * BN_num_bytes(data->grp->prime));
- wpabuf_put_data(data->outbuf, scalar, BN_num_bytes(data->grp->order));
+ wpabuf_put_data(data->outbuf, element, 2 * prime_len);
+ wpabuf_put_data(data->outbuf, scalar, order_len);
fin:
+ crypto_bignum_deinit(mask, 1);
os_free(scalar);
os_free(element);
- BN_clear_free(x);
- BN_clear_free(y);
if (data->outbuf == NULL)
eap_pwd_state(data, FAILURE);
}
@@ -305,11 +274,10 @@ fin:
static void eap_pwd_build_confirm_req(struct eap_sm *sm,
struct eap_pwd_data *data, u8 id)
{
- BIGNUM *x = NULL, *y = NULL;
struct crypto_hash *hash;
u8 conf[SHA256_MAC_LEN], *cruft = NULL, *ptr;
u16 grp;
- int offset;
+ size_t prime_len, order_len;
wpa_printf(MSG_DEBUG, "EAP-pwd: Confirm/Request");
/*
@@ -319,9 +287,12 @@ static void eap_pwd_build_confirm_req(struct eap_sm *sm,
if (data->out_frag_pos)
return;
+ prime_len = crypto_ec_prime_len(data->grp->group);
+ order_len = crypto_ec_order_len(data->grp->group);
+
/* Each component of the cruft will be at most as big as the prime */
- if (((cruft = os_malloc(BN_num_bytes(data->grp->prime))) == NULL) ||
- ((x = BN_new()) == NULL) || ((y = BN_new()) == NULL)) {
+ cruft = os_malloc(prime_len * 2);
+ if (!cruft) {
wpa_printf(MSG_INFO, "EAP-PWD (server): debug allocation "
"fail");
goto fin;
@@ -341,64 +312,38 @@ static void eap_pwd_build_confirm_req(struct eap_sm *sm,
*
* First is k
*/
- os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
- offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(data->k);
- BN_bn2bin(data->k, cruft + offset);
- eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime));
+ crypto_bignum_to_bin(data->k, cruft, prime_len, prime_len);
+ eap_pwd_h_update(hash, cruft, prime_len);
/* server element: x, y */
- if (!EC_POINT_get_affine_coordinates_GFp(data->grp->group,
- data->my_element, x, y,
- data->bnctx)) {
+ if (crypto_ec_point_to_bin(data->grp->group, data->my_element, cruft,
+ cruft + prime_len) < 0) {
wpa_printf(MSG_INFO, "EAP-PWD (server): confirm point "
"assignment fail");
goto fin;
}
-
- os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
- offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(x);
- BN_bn2bin(x, cruft + offset);
- eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime));
- os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
- offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(y);
- BN_bn2bin(y, cruft + offset);
- eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime));
+ eap_pwd_h_update(hash, cruft, prime_len * 2);
/* server scalar */
- os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
- offset = BN_num_bytes(data->grp->order) -
- BN_num_bytes(data->my_scalar);
- BN_bn2bin(data->my_scalar, cruft + offset);
- eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->order));
+ crypto_bignum_to_bin(data->my_scalar, cruft, order_len, order_len);
+ eap_pwd_h_update(hash, cruft, order_len);
/* peer element: x, y */
- if (!EC_POINT_get_affine_coordinates_GFp(data->grp->group,
- data->peer_element, x, y,
- data->bnctx)) {
+ if (crypto_ec_point_to_bin(data->grp->group, data->peer_element, cruft,
+ cruft + prime_len) < 0) {
wpa_printf(MSG_INFO, "EAP-PWD (server): confirm point "
"assignment fail");
goto fin;
}
-
- os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
- offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(x);
- BN_bn2bin(x, cruft + offset);
- eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime));
- os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
- offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(y);
- BN_bn2bin(y, cruft + offset);
- eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime));
+ eap_pwd_h_update(hash, cruft, prime_len * 2);
/* peer scalar */
- os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
- offset = BN_num_bytes(data->grp->order) -
- BN_num_bytes(data->peer_scalar);
- BN_bn2bin(data->peer_scalar, cruft + offset);
- eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->order));
+ crypto_bignum_to_bin(data->peer_scalar, cruft, order_len, order_len);
+ eap_pwd_h_update(hash, cruft, order_len);
/* ciphersuite */
grp = htons(data->group_num);
- os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
+ os_memset(cruft, 0, prime_len);
ptr = cruft;
os_memcpy(ptr, &grp, sizeof(u16));
ptr += sizeof(u16);
@@ -419,9 +364,7 @@ static void eap_pwd_build_confirm_req(struct eap_sm *sm,
wpabuf_put_data(data->outbuf, conf, SHA256_MAC_LEN);
fin:
- bin_clear_free(cruft, BN_num_bytes(data->grp->prime));
- BN_clear_free(x);
- BN_clear_free(y);
+ bin_clear_free(cruft, prime_len * 2);
if (data->outbuf == NULL)
eap_pwd_state(data, FAILURE);
}
@@ -649,7 +592,7 @@ static void eap_pwd_process_id_resp(struct eap_sm *sm,
return;
}
wpa_printf(MSG_DEBUG, "EAP-PWD (server): computed %d bit PWE...",
- BN_num_bits(data->grp->prime));
+ (int) crypto_ec_prime_len_bits(data->grp->group));
eap_pwd_state(data, PWD_Commit_Req);
}
@@ -659,16 +602,16 @@ static void
eap_pwd_process_commit_resp(struct eap_sm *sm, struct eap_pwd_data *data,
const u8 *payload, size_t payload_len)
{
- u8 *ptr;
- BIGNUM *x = NULL, *y = NULL, *cofactor = NULL;
- EC_POINT *K = NULL, *point = NULL;
+ const u8 *ptr;
+ struct crypto_bignum *cofactor = NULL;
+ struct crypto_ec_point *K = NULL, *point = NULL;
int res = 0;
size_t prime_len, order_len;
wpa_printf(MSG_DEBUG, "EAP-pwd: Received commit response");
- prime_len = BN_num_bytes(data->grp->prime);
- order_len = BN_num_bytes(data->grp->order);
+ prime_len = crypto_ec_prime_len(data->grp->group);
+ order_len = crypto_ec_order_len(data->grp->group);
if (payload_len != 2 * prime_len + order_len) {
wpa_printf(MSG_INFO,
@@ -678,49 +621,47 @@ eap_pwd_process_commit_resp(struct eap_sm *sm, struct eap_pwd_data *data,
goto fin;
}
- if (((data->peer_scalar = BN_new()) == NULL) ||
- ((data->k = BN_new()) == NULL) ||
- ((cofactor = BN_new()) == NULL) ||
- ((x = BN_new()) == NULL) ||
- ((y = BN_new()) == NULL) ||
- ((point = EC_POINT_new(data->grp->group)) == NULL) ||
- ((K = EC_POINT_new(data->grp->group)) == NULL) ||
- ((data->peer_element = EC_POINT_new(data->grp->group)) == NULL)) {
+ data->k = crypto_bignum_init();
+ cofactor = crypto_bignum_init();
+ point = crypto_ec_point_init(data->grp->group);
+ K = crypto_ec_point_init(data->grp->group);
+ if (!data->k || !cofactor || !point || !K) {
wpa_printf(MSG_INFO, "EAP-PWD (server): peer data allocation "
"fail");
goto fin;
}
- if (!EC_GROUP_get_cofactor(data->grp->group, cofactor, NULL)) {
+ if (crypto_ec_cofactor(data->grp->group, cofactor) < 0) {
wpa_printf(MSG_INFO, "EAP-PWD (server): unable to get "
"cofactor for curve");
goto fin;
}
/* element, x then y, followed by scalar */
- ptr = (u8 *) payload;
- BN_bin2bn(ptr, BN_num_bytes(data->grp->prime), x);
- ptr += BN_num_bytes(data->grp->prime);
- BN_bin2bn(ptr, BN_num_bytes(data->grp->prime), y);
- ptr += BN_num_bytes(data->grp->prime);
- BN_bin2bn(ptr, BN_num_bytes(data->grp->order), data->peer_scalar);
- if (!EC_POINT_set_affine_coordinates_GFp(data->grp->group,
- data->peer_element, x, y,
- data->bnctx)) {
+ ptr = payload;
+ data->peer_element = crypto_ec_point_from_bin(data->grp->group, ptr);
+ if (!data->peer_element) {
wpa_printf(MSG_INFO, "EAP-PWD (server): setting peer element "
"fail");
goto fin;
}
+ ptr += prime_len * 2;
+ data->peer_scalar = crypto_bignum_init_set(ptr, order_len);
+ if (!data->peer_scalar) {
+ wpa_printf(MSG_INFO, "EAP-PWD (server): peer data allocation "
+ "fail");
+ goto fin;
+ }
/* check to ensure peer's element is not in a small sub-group */
- if (BN_cmp(cofactor, BN_value_one())) {
- if (!EC_POINT_mul(data->grp->group, point, NULL,
- data->peer_element, cofactor, NULL)) {
+ if (!crypto_bignum_is_one(cofactor)) {
+ if (crypto_ec_point_mul(data->grp->group, data->peer_element,
+ cofactor, point) != 0) {
wpa_printf(MSG_INFO, "EAP-PWD (server): cannot "
"multiply peer element by order");
goto fin;
}
- if (EC_POINT_is_at_infinity(data->grp->group, point)) {
+ if (crypto_ec_point_is_at_infinity(data->grp->group, point)) {
wpa_printf(MSG_INFO, "EAP-PWD (server): peer element "
"is at infinity!\n");
goto fin;
@@ -728,21 +669,21 @@ eap_pwd_process_commit_resp(struct eap_sm *sm, struct eap_pwd_data *data,
}
/* compute the shared key, k */
- if ((!EC_POINT_mul(data->grp->group, K, NULL, data->grp->pwe,
- data->peer_scalar, data->bnctx)) ||
- (!EC_POINT_add(data->grp->group, K, K, data->peer_element,
- data->bnctx)) ||
- (!EC_POINT_mul(data->grp->group, K, NULL, K, data->private_value,
- data->bnctx))) {
+ if ((crypto_ec_point_mul(data->grp->group, data->grp->pwe,
+ data->peer_scalar, K) < 0) ||
+ (crypto_ec_point_add(data->grp->group, K, data->peer_element,
+ K) < 0) ||
+ (crypto_ec_point_mul(data->grp->group, K, data->private_value,
+ K) < 0)) {
wpa_printf(MSG_INFO, "EAP-PWD (server): computing shared key "
"fail");
goto fin;
}
/* ensure that the shared key isn't in a small sub-group */
- if (BN_cmp(cofactor, BN_value_one())) {
- if (!EC_POINT_mul(data->grp->group, K, NULL, K, cofactor,
- NULL)) {
+ if (!crypto_bignum_is_one(cofactor)) {
+ if (crypto_ec_point_mul(data->grp->group, K, cofactor,
+ K) != 0) {
wpa_printf(MSG_INFO, "EAP-PWD (server): cannot "
"multiply shared key point by order!\n");
goto fin;
@@ -755,13 +696,12 @@ eap_pwd_process_commit_resp(struct eap_sm *sm, struct eap_pwd_data *data,
* never going to happen it is a simple and safe check "just to be
* sure" so let's be safe.
*/
- if (EC_POINT_is_at_infinity(data->grp->group, K)) {
+ if (crypto_ec_point_is_at_infinity(data->grp->group, K)) {
wpa_printf(MSG_INFO, "EAP-PWD (server): shared key point is "
"at infinity");
goto fin;
}
- if (!EC_POINT_get_affine_coordinates_GFp(data->grp->group, K, data->k,
- NULL, data->bnctx)) {
+ if (crypto_ec_point_x(data->grp->group, K, data->k)) {
wpa_printf(MSG_INFO, "EAP-PWD (server): unable to extract "
"shared secret from secret point");
goto fin;
@@ -769,11 +709,9 @@ eap_pwd_process_commit_resp(struct eap_sm *sm, struct eap_pwd_data *data,
res = 1;
fin:
- EC_POINT_clear_free(K);
- EC_POINT_clear_free(point);
- BN_clear_free(cofactor);
- BN_clear_free(x);
- BN_clear_free(y);
+ crypto_ec_point_deinit(K, 1);
+ crypto_ec_point_deinit(point, 1);
+ crypto_bignum_deinit(cofactor, 1);
if (res)
eap_pwd_state(data, PWD_Confirm_Req);
@@ -786,12 +724,14 @@ static void
eap_pwd_process_confirm_resp(struct eap_sm *sm, struct eap_pwd_data *data,
const u8 *payload, size_t payload_len)
{
- BIGNUM *x = NULL, *y = NULL;
struct crypto_hash *hash;
u32 cs;
u16 grp;
u8 conf[SHA256_MAC_LEN], *cruft = NULL, *ptr;
- int offset;
+ size_t prime_len, order_len;
+
+ prime_len = crypto_ec_prime_len(data->grp->group);
+ order_len = crypto_ec_order_len(data->grp->group);
if (payload_len != SHA256_MAC_LEN) {
wpa_printf(MSG_INFO,
@@ -810,8 +750,8 @@ eap_pwd_process_confirm_resp(struct eap_sm *sm, struct eap_pwd_data *data,
*ptr = EAP_PWD_DEFAULT_PRF;
/* each component of the cruft will be at most as big as the prime */
- if (((cruft = os_malloc(BN_num_bytes(data->grp->prime))) == NULL) ||
- ((x = BN_new()) == NULL) || ((y = BN_new()) == NULL)) {
+ cruft = os_malloc(prime_len * 2);
+ if (!cruft) {
wpa_printf(MSG_INFO, "EAP-PWD (peer): allocation fail");
goto fin;
}
@@ -825,62 +765,36 @@ eap_pwd_process_confirm_resp(struct eap_sm *sm, struct eap_pwd_data *data,
goto fin;
/* k */
- os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
- offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(data->k);
- BN_bn2bin(data->k, cruft + offset);
- eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime));
+ crypto_bignum_to_bin(data->k, cruft, prime_len, prime_len);
+ eap_pwd_h_update(hash, cruft, prime_len);
/* peer element: x, y */
- if (!EC_POINT_get_affine_coordinates_GFp(data->grp->group,
- data->peer_element, x, y,
- data->bnctx)) {
+ if (crypto_ec_point_to_bin(data->grp->group, data->peer_element, cruft,
+ cruft + prime_len) < 0) {
wpa_printf(MSG_INFO, "EAP-PWD (server): confirm point "
"assignment fail");
goto fin;
}
- os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
- offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(x);
- BN_bn2bin(x, cruft + offset);
- eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime));
- os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
- offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(y);
- BN_bn2bin(y, cruft + offset);
- eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime));
+ eap_pwd_h_update(hash, cruft, prime_len * 2);
/* peer scalar */
- os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
- offset = BN_num_bytes(data->grp->order) -
- BN_num_bytes(data->peer_scalar);
- BN_bn2bin(data->peer_scalar, cruft + offset);
- eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->order));
+ crypto_bignum_to_bin(data->peer_scalar, cruft, order_len, order_len);
+ eap_pwd_h_update(hash, cruft, order_len);
/* server element: x, y */
- if (!EC_POINT_get_affine_coordinates_GFp(data->grp->group,
- data->my_element, x, y,
- data->bnctx)) {
+ if (crypto_ec_point_to_bin(data->grp->group, data->my_element, cruft,
+ cruft + prime_len) < 0) {
wpa_printf(MSG_INFO, "EAP-PWD (server): confirm point "
"assignment fail");
goto fin;
}
-
- os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
- offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(x);
- BN_bn2bin(x, cruft + offset);
- eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime));
- os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
- offset = BN_num_bytes(data->grp->prime) - BN_num_bytes(y);
- BN_bn2bin(y, cruft + offset);
- eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->prime));
+ eap_pwd_h_update(hash, cruft, prime_len * 2);
/* server scalar */
- os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
- offset = BN_num_bytes(data->grp->order) -
- BN_num_bytes(data->my_scalar);
- BN_bn2bin(data->my_scalar, cruft + offset);
- eap_pwd_h_update(hash, cruft, BN_num_bytes(data->grp->order));
+ crypto_bignum_to_bin(data->my_scalar, cruft, order_len, order_len);
+ eap_pwd_h_update(hash, cruft, order_len);
/* ciphersuite */
- os_memset(cruft, 0, BN_num_bytes(data->grp->prime));
eap_pwd_h_update(hash, (u8 *) &cs, sizeof(u32));
/* all done */
@@ -894,7 +808,7 @@ eap_pwd_process_confirm_resp(struct eap_sm *sm, struct eap_pwd_data *data,
}
wpa_printf(MSG_DEBUG, "EAP-pwd (server): confirm verified");
- if (compute_keys(data->grp, data->bnctx, data->k,
+ if (compute_keys(data->grp, data->k,
data->peer_scalar, data->my_scalar, conf,
data->my_confirm, &cs, data->msk, data->emsk,
data->session_id) < 0)
@@ -903,9 +817,7 @@ eap_pwd_process_confirm_resp(struct eap_sm *sm, struct eap_pwd_data *data,
eap_pwd_state(data, SUCCESS);
fin:
- bin_clear_free(cruft, BN_num_bytes(data->grp->prime));
- BN_clear_free(x);
- BN_clear_free(y);
+ bin_clear_free(cruft, prime_len * 2);
}
diff --git a/wpa_supplicant/Android.mk b/wpa_supplicant/Android.mk
index 1faff2e..12e0bb9 100644
--- a/wpa_supplicant/Android.mk
+++ b/wpa_supplicant/Android.mk
@@ -684,6 +684,7 @@ L_CFLAGS += -DEAP_PWD
OBJS += src/eap_peer/eap_pwd.c src/eap_common/eap_pwd_common.c
CONFIG_IEEE8021X_EAPOL=y
NEED_SHA256=y
+NEED_ECC=y
endif
ifdef CONFIG_EAP_EKE
diff --git a/wpa_supplicant/Makefile b/wpa_supplicant/Makefile
index 65205d8..2ec011f 100644
--- a/wpa_supplicant/Makefile
+++ b/wpa_supplicant/Makefile
@@ -712,6 +712,7 @@ CFLAGS += -DEAP_PWD
OBJS += ../src/eap_peer/eap_pwd.o ../src/eap_common/eap_pwd_common.o
CONFIG_IEEE8021X_EAPOL=y
NEED_SHA256=y
+NEED_ECC=y
endif
ifdef CONFIG_EAP_EKE