diff options
| author | Stefan Berger <stefanb@linux.ibm.com> | 2024-04-04 10:18:48 -0400 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2024-04-12 15:07:52 +0800 |
| commit | c0d6bd1fd367a5374bff7e3f3bdf47beb84893c8 (patch) | |
| tree | e599648a46283c0efbaba045b872648f6d01a757 | |
| parent | 48e8d3a5f4f902f2bcd70cc88ff784aa7d6d2c63 (diff) | |
crypto: ecc - Add nbits field to ecc_curve structure
Add the number of bits a curve has to the ecc_curve definition to be able
to derive the number of bytes a curve requires for its coordinates from it.
It also allows one to identify a curve by its particular size. Set the
number of bits on all curve definitions.
Tested-by: Lukas Wunner <lukas@wunner.de>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Reviewed-by: Vitaly Chikunov <vt@altlinux.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | crypto/ecc_curve_defs.h | 4 | ||||
| -rw-r--r-- | crypto/ecrdsa_defs.h | 5 | ||||
| -rw-r--r-- | include/crypto/ecc_curve.h | 2 |
3 files changed, 11 insertions, 0 deletions
diff --git a/crypto/ecc_curve_defs.h b/crypto/ecc_curve_defs.h index 9719934c9428..ab1ef3d94be5 100644 --- a/crypto/ecc_curve_defs.h +++ b/crypto/ecc_curve_defs.h @@ -17,6 +17,7 @@ static u64 nist_p192_b[] = { 0xFEB8DEECC146B9B1ull, 0x0FA7E9AB72243049ull, 0x64210519E59C80E7ull }; static struct ecc_curve nist_p192 = { .name = "nist_192", + .nbits = 192, .g = { .x = nist_p192_g_x, .y = nist_p192_g_y, @@ -43,6 +44,7 @@ static u64 nist_p256_b[] = { 0x3BCE3C3E27D2604Bull, 0x651D06B0CC53B0F6ull, 0xB3EBBD55769886BCull, 0x5AC635D8AA3A93E7ull }; static struct ecc_curve nist_p256 = { .name = "nist_256", + .nbits = 256, .g = { .x = nist_p256_g_x, .y = nist_p256_g_y, @@ -75,6 +77,7 @@ static u64 nist_p384_b[] = { 0x2a85c8edd3ec2aefull, 0xc656398d8a2ed19dull, 0x988e056be3f82d19ull, 0xb3312fa7e23ee7e4ull }; static struct ecc_curve nist_p384 = { .name = "nist_384", + .nbits = 384, .g = { .x = nist_p384_g_x, .y = nist_p384_g_y, @@ -95,6 +98,7 @@ static u64 curve25519_a[] = { 0x000000000001DB41, 0x0000000000000000, 0x0000000000000000, 0x0000000000000000 }; static const struct ecc_curve ecc_25519 = { .name = "curve25519", + .nbits = 255, .g = { .x = curve25519_g_x, .ndigits = 4, diff --git a/crypto/ecrdsa_defs.h b/crypto/ecrdsa_defs.h index 0056335b9d03..1c2c2449e331 100644 --- a/crypto/ecrdsa_defs.h +++ b/crypto/ecrdsa_defs.h @@ -47,6 +47,7 @@ static u64 cp256a_b[] = { static struct ecc_curve gost_cp256a = { .name = "cp256a", + .nbits = 256, .g = { .x = cp256a_g_x, .y = cp256a_g_y, @@ -80,6 +81,7 @@ static u64 cp256b_b[] = { static struct ecc_curve gost_cp256b = { .name = "cp256b", + .nbits = 256, .g = { .x = cp256b_g_x, .y = cp256b_g_y, @@ -117,6 +119,7 @@ static u64 cp256c_b[] = { static struct ecc_curve gost_cp256c = { .name = "cp256c", + .nbits = 256, .g = { .x = cp256c_g_x, .y = cp256c_g_y, @@ -166,6 +169,7 @@ static u64 tc512a_b[] = { static struct ecc_curve gost_tc512a = { .name = "tc512a", + .nbits = 512, .g = { .x = tc512a_g_x, .y = tc512a_g_y, @@ -211,6 +215,7 @@ static u64 tc512b_b[] = { static struct ecc_curve gost_tc512b = { .name = "tc512b", + .nbits = 512, .g = { .x = tc512b_g_x, .y = tc512b_g_y, diff --git a/include/crypto/ecc_curve.h b/include/crypto/ecc_curve.h index 70964781eb68..7d90c5e82266 100644 --- a/include/crypto/ecc_curve.h +++ b/include/crypto/ecc_curve.h @@ -23,6 +23,7 @@ struct ecc_point { * struct ecc_curve - definition of elliptic curve * * @name: Short name of the curve. + * @nbits: The number of bits of a curve. * @g: Generator point of the curve. * @p: Prime number, if Barrett's reduction is used for this curve * pre-calculated value 'mu' is appended to the @p after ndigits. @@ -34,6 +35,7 @@ struct ecc_point { */ struct ecc_curve { char *name; + u32 nbits; struct ecc_point g; u64 *p; u64 *n; |