crypto: ecc - make ecc into separate module
ecc.c have algorithms that could be used togeter by ecdh and ecrdsa.
Make it separate module. Add CRYPTO_ECC into Kconfig. EXPORT_SYMBOL and
document to what seems appropriate. Move structs ecc_point and ecc_curve
from ecc_curve_defs.h into ecc.h.
No code changes.
Signed-off-by: Vitaly Chikunov <vt@altlinux.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/crypto/ecc.c b/crypto/ecc.c
index ed12371..5f36792 100644
--- a/crypto/ecc.c
+++ b/crypto/ecc.c
@@ -24,6 +24,7 @@
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
+#include <linux/module.h>
#include <linux/random.h>
#include <linux/slab.h>
#include <linux/swab.h>
@@ -112,7 +113,7 @@ static void vli_clear(u64 *vli, unsigned int ndigits)
}
/* Returns true if vli == 0, false otherwise. */
-static bool vli_is_zero(const u64 *vli, unsigned int ndigits)
+bool vli_is_zero(const u64 *vli, unsigned int ndigits)
{
int i;
@@ -123,6 +124,7 @@ static bool vli_is_zero(const u64 *vli, unsigned int ndigits)
return true;
}
+EXPORT_SYMBOL(vli_is_zero);
/* Returns nonzero if bit bit of vli is set. */
static u64 vli_test_bit(const u64 *vli, unsigned int bit)
@@ -171,7 +173,7 @@ static void vli_set(u64 *dest, const u64 *src, unsigned int ndigits)
}
/* Returns sign of left - right. */
-static int vli_cmp(const u64 *left, const u64 *right, unsigned int ndigits)
+int vli_cmp(const u64 *left, const u64 *right, unsigned int ndigits)
{
int i;
@@ -184,6 +186,7 @@ static int vli_cmp(const u64 *left, const u64 *right, unsigned int ndigits)
return 0;
}
+EXPORT_SYMBOL(vli_cmp);
/* Computes result = in << c, returning carry. Can modify in place
* (if result == in). 0 < shift < 64.
@@ -240,7 +243,7 @@ static u64 vli_add(u64 *result, const u64 *left, const u64 *right,
}
/* Computes result = left - right, returning borrow. Can modify in place. */
-static u64 vli_sub(u64 *result, const u64 *left, const u64 *right,
+u64 vli_sub(u64 *result, const u64 *left, const u64 *right,
unsigned int ndigits)
{
u64 borrow = 0;
@@ -258,6 +261,7 @@ static u64 vli_sub(u64 *result, const u64 *left, const u64 *right,
return borrow;
}
+EXPORT_SYMBOL(vli_sub);
static uint128_t mul_64_64(u64 left, u64 right)
{
@@ -557,7 +561,7 @@ static void vli_mod_square_fast(u64 *result, const u64 *left,
* See "From Euclid's GCD to Montgomery Multiplication to the Great Divide"
* https://labs.oracle.com/techrep/2001/smli_tr-2001-95.pdf
*/
-static void vli_mod_inv(u64 *result, const u64 *input, const u64 *mod,
+void vli_mod_inv(u64 *result, const u64 *input, const u64 *mod,
unsigned int ndigits)
{
u64 a[ECC_MAX_DIGITS], b[ECC_MAX_DIGITS];
@@ -630,6 +634,7 @@ static void vli_mod_inv(u64 *result, const u64 *input, const u64 *mod,
vli_set(result, u, ndigits);
}
+EXPORT_SYMBOL(vli_mod_inv);
/* ------ Point operations ------ */
@@ -948,6 +953,7 @@ int ecc_is_key_valid(unsigned int curve_id, unsigned int ndigits,
return __ecc_is_key_valid(curve, private_key, ndigits);
}
+EXPORT_SYMBOL(ecc_is_key_valid);
/*
* ECC private keys are generated using the method of extra random bits,
@@ -1000,6 +1006,7 @@ int ecc_gen_privkey(unsigned int curve_id, unsigned int ndigits, u64 *privkey)
return 0;
}
+EXPORT_SYMBOL(ecc_gen_privkey);
int ecc_make_pub_key(unsigned int curve_id, unsigned int ndigits,
const u64 *private_key, u64 *public_key)
@@ -1036,10 +1043,11 @@ int ecc_make_pub_key(unsigned int curve_id, unsigned int ndigits,
out:
return ret;
}
+EXPORT_SYMBOL(ecc_make_pub_key);
/* SP800-56A section 5.6.2.3.4 partial verification: ephemeral keys only */
-static int ecc_is_pubkey_valid_partial(const struct ecc_curve *curve,
- struct ecc_point *pk)
+int ecc_is_pubkey_valid_partial(const struct ecc_curve *curve,
+ struct ecc_point *pk)
{
u64 yy[ECC_MAX_DIGITS], xxx[ECC_MAX_DIGITS], w[ECC_MAX_DIGITS];
@@ -1064,8 +1072,8 @@ static int ecc_is_pubkey_valid_partial(const struct ecc_curve *curve,
return -EINVAL;
return 0;
-
}
+EXPORT_SYMBOL(ecc_is_pubkey_valid_partial);
int crypto_ecdh_shared_secret(unsigned int curve_id, unsigned int ndigits,
const u64 *private_key, const u64 *public_key,
@@ -1121,3 +1129,6 @@ int crypto_ecdh_shared_secret(unsigned int curve_id, unsigned int ndigits,
out:
return ret;
}
+EXPORT_SYMBOL(crypto_ecdh_shared_secret);
+
+MODULE_LICENSE("Dual BSD/GPL");