diff options
Diffstat (limited to 'crypto/curve25519-generic.c')
-rw-r--r-- | crypto/curve25519-generic.c | 91 |
1 files changed, 0 insertions, 91 deletions
diff --git a/crypto/curve25519-generic.c b/crypto/curve25519-generic.c deleted file mode 100644 index f3e56e73c66c..000000000000 --- a/crypto/curve25519-generic.c +++ /dev/null @@ -1,91 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later - -#include <crypto/curve25519.h> -#include <crypto/internal/kpp.h> -#include <crypto/kpp.h> -#include <linux/module.h> -#include <linux/scatterlist.h> - -static int curve25519_set_secret(struct crypto_kpp *tfm, const void *buf, - unsigned int len) -{ - u8 *secret = kpp_tfm_ctx(tfm); - - if (!len) - curve25519_generate_secret(secret); - else if (len == CURVE25519_KEY_SIZE && - crypto_memneq(buf, curve25519_null_point, CURVE25519_KEY_SIZE)) - memcpy(secret, buf, CURVE25519_KEY_SIZE); - else - return -EINVAL; - return 0; -} - -static int curve25519_compute_value(struct kpp_request *req) -{ - struct crypto_kpp *tfm = crypto_kpp_reqtfm(req); - const u8 *secret = kpp_tfm_ctx(tfm); - u8 public_key[CURVE25519_KEY_SIZE]; - u8 buf[CURVE25519_KEY_SIZE]; - int copied, nbytes; - u8 const *bp; - - if (req->src) { - copied = sg_copy_to_buffer(req->src, - sg_nents_for_len(req->src, - CURVE25519_KEY_SIZE), - public_key, CURVE25519_KEY_SIZE); - if (copied != CURVE25519_KEY_SIZE) - return -EINVAL; - bp = public_key; - } else { - bp = curve25519_base_point; - } - - curve25519_generic(buf, secret, bp); - - /* might want less than we've got */ - nbytes = min_t(size_t, CURVE25519_KEY_SIZE, req->dst_len); - copied = sg_copy_from_buffer(req->dst, sg_nents_for_len(req->dst, - nbytes), - buf, nbytes); - if (copied != nbytes) - return -EINVAL; - return 0; -} - -static unsigned int curve25519_max_size(struct crypto_kpp *tfm) -{ - return CURVE25519_KEY_SIZE; -} - -static struct kpp_alg curve25519_alg = { - .base.cra_name = "curve25519", - .base.cra_driver_name = "curve25519-generic", - .base.cra_priority = 100, - .base.cra_module = THIS_MODULE, - .base.cra_ctxsize = CURVE25519_KEY_SIZE, - - .set_secret = curve25519_set_secret, - .generate_public_key = curve25519_compute_value, - .compute_shared_secret = curve25519_compute_value, - .max_size = curve25519_max_size, -}; - -static int __init curve25519_init(void) -{ - return crypto_register_kpp(&curve25519_alg); -} - -static void __exit curve25519_exit(void) -{ - crypto_unregister_kpp(&curve25519_alg); -} - -module_init(curve25519_init); -module_exit(curve25519_exit); - -MODULE_ALIAS_CRYPTO("curve25519"); -MODULE_ALIAS_CRYPTO("curve25519-generic"); -MODULE_DESCRIPTION("Curve25519 elliptic curve (RFC7748)"); -MODULE_LICENSE("GPL"); |