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-rw-r--r--c_src/linux/crypto/api.c114
-rw-r--r--c_src/linux/crypto/chacha20_generic.c111
-rw-r--r--c_src/linux/crypto/poly1305_generic.c88
-rw-r--r--c_src/linux/crypto/sha256_generic.c81
4 files changed, 394 insertions, 0 deletions
diff --git a/c_src/linux/crypto/api.c b/c_src/linux/crypto/api.c
new file mode 100644
index 00000000..2f3ab2b5
--- /dev/null
+++ b/c_src/linux/crypto/api.c
@@ -0,0 +1,114 @@
+/*
+ * Cryptographic API for algorithms (i.e., low-level API).
+ *
+ * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ */
+
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/rwsem.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+
+#include <crypto/algapi.h>
+
+static LIST_HEAD(crypto_alg_list);
+static DECLARE_RWSEM(crypto_alg_sem);
+
+struct crypto_type {
+};
+
+int crypto_register_alg(struct crypto_alg *alg)
+{
+ down_write(&crypto_alg_sem);
+ list_add(&alg->cra_list, &crypto_alg_list);
+ up_write(&crypto_alg_sem);
+
+ return 0;
+}
+
+static void *crypto_alloc_tfm(const char *name,
+ const struct crypto_type *type)
+{
+ struct crypto_alg *alg;
+
+ down_read(&crypto_alg_sem);
+ list_for_each_entry(alg, &crypto_alg_list, cra_list)
+ if (alg->cra_type == type && !strcmp(alg->cra_name, name))
+ goto found;
+
+ alg = ERR_PTR(-ENOENT);
+found:
+ up_read(&crypto_alg_sem);
+
+ if (IS_ERR(alg))
+ return ERR_CAST(alg);
+
+ return alg->alloc_tfm() ?: ERR_PTR(-ENOMEM);
+}
+
+/* skcipher: */
+
+static const struct crypto_type crypto_skcipher_type2 = {
+};
+
+struct crypto_skcipher *crypto_alloc_skcipher(const char *name,
+ u32 type, u32 mask)
+{
+ return crypto_alloc_tfm(name, &crypto_skcipher_type2);
+}
+
+int crypto_register_skcipher(struct skcipher_alg *alg)
+{
+ alg->base.cra_type = &crypto_skcipher_type2;
+
+ return crypto_register_alg(&alg->base);
+}
+
+/* shash: */
+
+#include <crypto/hash.h>
+
+static int shash_finup(struct shash_desc *desc, const u8 *data,
+ unsigned len, u8 *out)
+{
+ return crypto_shash_update(desc, data, len) ?:
+ crypto_shash_final(desc, out);
+}
+
+static int shash_digest(struct shash_desc *desc, const u8 *data,
+ unsigned len, u8 *out)
+{
+ return crypto_shash_init(desc) ?:
+ crypto_shash_finup(desc, data, len, out);
+}
+
+static const struct crypto_type crypto_shash_type = {
+};
+
+struct crypto_shash *crypto_alloc_shash(const char *name,
+ u32 type, u32 mask)
+{
+ return crypto_alloc_tfm(name, &crypto_shash_type);
+}
+
+int crypto_register_shash(struct shash_alg *alg)
+{
+ alg->base.cra_type = &crypto_shash_type;
+
+ if (!alg->finup)
+ alg->finup = shash_finup;
+ if (!alg->digest)
+ alg->digest = shash_digest;
+
+ return crypto_register_alg(&alg->base);
+}
diff --git a/c_src/linux/crypto/chacha20_generic.c b/c_src/linux/crypto/chacha20_generic.c
new file mode 100644
index 00000000..914189e7
--- /dev/null
+++ b/c_src/linux/crypto/chacha20_generic.c
@@ -0,0 +1,111 @@
+/*
+ * ChaCha20 256-bit cipher algorithm, RFC7539
+ *
+ * Copyright (C) 2015 Martin Willi
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/byteorder.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/scatterlist.h>
+#include <asm/unaligned.h>
+
+#include <linux/crypto.h>
+#include <crypto/algapi.h>
+#include <crypto/chacha.h>
+#include <crypto/skcipher.h>
+
+#include <sodium/crypto_stream_chacha20.h>
+
+static struct skcipher_alg alg;
+
+struct chacha20_tfm {
+ struct crypto_skcipher tfm;
+ u32 key[8];
+};
+
+static int crypto_chacha20_setkey(struct crypto_skcipher *tfm, const u8 *key,
+ unsigned int keysize)
+{
+ struct chacha20_tfm *ctx =
+ container_of(tfm, struct chacha20_tfm, tfm);
+ int i;
+
+ if (keysize != CHACHA_KEY_SIZE)
+ return -EINVAL;
+
+ for (i = 0; i < ARRAY_SIZE(ctx->key); i++)
+ ctx->key[i] = get_unaligned_le32(key + i * sizeof(u32));
+
+ return 0;
+}
+
+static int crypto_chacha20_crypt(struct skcipher_request *req)
+{
+ struct chacha20_tfm *ctx =
+ container_of(req->tfm, struct chacha20_tfm, tfm.base);
+ struct scatterlist *sg = req->src;
+ unsigned nbytes = req->cryptlen;
+ u32 iv[4];
+ int ret;
+
+ BUG_ON(req->src != req->dst);
+
+ memcpy(iv, req->iv, sizeof(iv));
+
+ while (1) {
+ ret = crypto_stream_chacha20_xor_ic(sg_virt(sg),
+ sg_virt(sg),
+ sg->length,
+ (void *) &iv[2],
+ iv[0] | ((u64) iv[1] << 32),
+ (void *) ctx->key);
+ BUG_ON(ret);
+
+ nbytes -= sg->length;
+
+ if (sg_is_last(sg))
+ break;
+
+ BUG_ON(sg->length % CHACHA_BLOCK_SIZE);
+ iv[0] += sg->length / CHACHA_BLOCK_SIZE;
+ sg = sg_next(sg);
+ };
+
+ BUG_ON(nbytes);
+
+ return 0;
+}
+
+static void *crypto_chacha20_alloc_tfm(void)
+{
+ struct chacha20_tfm *tfm = kzalloc(sizeof(*tfm), GFP_KERNEL);
+
+ if (!tfm)
+ return NULL;
+
+ tfm->tfm.base.alg = &alg.base;
+ tfm->tfm.setkey = crypto_chacha20_setkey;
+ tfm->tfm.encrypt = crypto_chacha20_crypt;
+ tfm->tfm.decrypt = crypto_chacha20_crypt;
+ tfm->tfm.ivsize = CHACHA_IV_SIZE;
+ tfm->tfm.keysize = CHACHA_KEY_SIZE;
+
+ return tfm;
+}
+
+static struct skcipher_alg alg = {
+ .base.cra_name = "chacha20",
+ .base.alloc_tfm = crypto_chacha20_alloc_tfm,
+};
+
+__attribute__((constructor(110)))
+static int chacha20_generic_mod_init(void)
+{
+ return crypto_register_skcipher(&alg);
+}
diff --git a/c_src/linux/crypto/poly1305_generic.c b/c_src/linux/crypto/poly1305_generic.c
new file mode 100644
index 00000000..acb554c0
--- /dev/null
+++ b/c_src/linux/crypto/poly1305_generic.c
@@ -0,0 +1,88 @@
+/*
+ * Poly1305 authenticator algorithm, RFC7539
+ *
+ * Copyright (C) 2015 Martin Willi
+ *
+ * Based on public domain code by Andrew Moon and Daniel J. Bernstein.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/byteorder.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <asm/unaligned.h>
+
+#include <linux/crypto.h>
+#include <crypto/algapi.h>
+#include <crypto/hash.h>
+#include <crypto/poly1305.h>
+
+static struct shash_alg poly1305_alg;
+
+struct poly1305_desc_ctx {
+ bool key_done;
+ crypto_onetimeauth_poly1305_state s;
+};
+
+static int poly1305_init(struct shash_desc *desc)
+{
+ struct poly1305_desc_ctx *state = (void *) desc->ctx;
+
+ state->key_done = false;
+ return 0;
+}
+
+static int poly1305_update(struct shash_desc *desc,
+ const u8 *src, unsigned len)
+{
+ struct poly1305_desc_ctx *state = (void *) desc->ctx;
+
+ if (!state->key_done) {
+ BUG_ON(len != crypto_onetimeauth_poly1305_KEYBYTES);
+
+ state->key_done = true;
+ return crypto_onetimeauth_poly1305_init(&state->s, src);
+ }
+
+ return crypto_onetimeauth_poly1305_update(&state->s, src, len);
+}
+
+static int poly1305_final(struct shash_desc *desc, u8 *out)
+{
+ struct poly1305_desc_ctx *state = (void *) desc->ctx;
+
+ return crypto_onetimeauth_poly1305_final(&state->s, out);
+}
+
+static void *poly1305_alloc_tfm(void)
+{
+ struct crypto_shash *tfm = kzalloc(sizeof(*tfm), GFP_KERNEL);
+
+ if (!tfm)
+ return NULL;
+
+ tfm->base.alg = &poly1305_alg.base;
+ tfm->descsize = sizeof(struct poly1305_desc_ctx);
+ return tfm;
+}
+
+static struct shash_alg poly1305_alg = {
+ .digestsize = crypto_onetimeauth_poly1305_BYTES,
+ .init = poly1305_init,
+ .update = poly1305_update,
+ .final = poly1305_final,
+ .descsize = sizeof(struct poly1305_desc_ctx),
+
+ .base.cra_name = "poly1305",
+ .base.alloc_tfm = poly1305_alloc_tfm,
+};
+
+__attribute__((constructor(110)))
+static int poly1305_mod_init(void)
+{
+ return crypto_register_shash(&poly1305_alg);
+}
diff --git a/c_src/linux/crypto/sha256_generic.c b/c_src/linux/crypto/sha256_generic.c
new file mode 100644
index 00000000..9326bfe7
--- /dev/null
+++ b/c_src/linux/crypto/sha256_generic.c
@@ -0,0 +1,81 @@
+/*
+ * Cryptographic API.
+ *
+ * SHA-256, as specified in
+ * http://csrc.nist.gov/groups/STM/cavp/documents/shs/sha256-384-512.pdf
+ *
+ * SHA-256 code by Jean-Luc Cooke <jlcooke@certainkey.com>.
+ *
+ * Copyright (c) Jean-Luc Cooke <jlcooke@certainkey.com>
+ * Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
+ * Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
+ * SHA224 Support Copyright 2007 Intel Corporation <jonathan.lynch@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ */
+
+#include <linux/bitops.h>
+#include <linux/byteorder.h>
+#include <linux/types.h>
+#include <asm/unaligned.h>
+
+#include <linux/crypto.h>
+#include <crypto/hash.h>
+
+#include <sodium/crypto_hash_sha256.h>
+
+static struct shash_alg sha256_alg;
+
+static int sha256_init(struct shash_desc *desc)
+{
+ crypto_hash_sha256_state *state = (void *) desc->ctx;
+
+ return crypto_hash_sha256_init(state);
+}
+
+static int sha256_update(struct shash_desc *desc, const u8 *data,
+ unsigned int len)
+{
+ crypto_hash_sha256_state *state = (void *) desc->ctx;
+
+ return crypto_hash_sha256_update(state, data, len);
+}
+
+static int sha256_final(struct shash_desc *desc, u8 *out)
+{
+ crypto_hash_sha256_state *state = (void *) desc->ctx;
+
+ return crypto_hash_sha256_final(state, out);
+}
+
+static void *sha256_alloc_tfm(void)
+{
+ struct crypto_shash *tfm = kzalloc(sizeof(*tfm), GFP_KERNEL);
+
+ if (!tfm)
+ return NULL;
+
+ tfm->base.alg = &sha256_alg.base;
+ tfm->descsize = sizeof(crypto_hash_sha256_state);
+ return tfm;
+}
+
+static struct shash_alg sha256_alg = {
+ .digestsize = crypto_hash_sha256_BYTES,
+ .init = sha256_init,
+ .update = sha256_update,
+ .final = sha256_final,
+ .descsize = sizeof(crypto_hash_sha256_state),
+ .base.cra_name = "sha256",
+ .base.alloc_tfm = sha256_alloc_tfm,
+};
+
+__attribute__((constructor(110)))
+static int __init sha256_generic_mod_init(void)
+{
+ return crypto_register_shash(&sha256_alg);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-01 01:27:30 +0000