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-rw-r--r--crypto/tea.c215
1 files changed, 87 insertions, 128 deletions
diff --git a/crypto/tea.c b/crypto/tea.c
index 5924efdd3a1..0a572323ee4 100644
--- a/crypto/tea.c
+++ b/crypto/tea.c
@@ -22,8 +22,9 @@
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mm.h>
-#include <asm/scatterlist.h>
+#include <asm/byteorder.h>
#include <linux/crypto.h>
+#include <linux/types.h>
#define TEA_KEY_SIZE 16
#define TEA_BLOCK_SIZE 8
@@ -35,9 +36,6 @@
#define XTEA_ROUNDS 32
#define XTEA_DELTA 0x9e3779b9
-#define u32_in(x) le32_to_cpu(*(const __le32 *)(x))
-#define u32_out(to, from) (*(__le32 *)(to) = cpu_to_le32(from))
-
struct tea_ctx {
u32 KEY[4];
};
@@ -46,36 +44,31 @@ struct xtea_ctx {
u32 KEY[4];
};
-static int tea_setkey(void *ctx_arg, const u8 *in_key,
- unsigned int key_len, u32 *flags)
-{
-
- struct tea_ctx *ctx = ctx_arg;
-
- if (key_len != 16)
- {
- *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
- return -EINVAL;
- }
+static int tea_setkey(struct crypto_tfm *tfm, const u8 *in_key,
+ unsigned int key_len)
+{
+ struct tea_ctx *ctx = crypto_tfm_ctx(tfm);
+ const __le32 *key = (const __le32 *)in_key;
- ctx->KEY[0] = u32_in (in_key);
- ctx->KEY[1] = u32_in (in_key + 4);
- ctx->KEY[2] = u32_in (in_key + 8);
- ctx->KEY[3] = u32_in (in_key + 12);
+ ctx->KEY[0] = le32_to_cpu(key[0]);
+ ctx->KEY[1] = le32_to_cpu(key[1]);
+ ctx->KEY[2] = le32_to_cpu(key[2]);
+ ctx->KEY[3] = le32_to_cpu(key[3]);
return 0;
}
-static void tea_encrypt(void *ctx_arg, u8 *dst, const u8 *src)
-{
+static void tea_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
+{
u32 y, z, n, sum = 0;
u32 k0, k1, k2, k3;
+ struct tea_ctx *ctx = crypto_tfm_ctx(tfm);
+ const __le32 *in = (const __le32 *)src;
+ __le32 *out = (__le32 *)dst;
- struct tea_ctx *ctx = ctx_arg;
-
- y = u32_in (src);
- z = u32_in (src + 4);
+ y = le32_to_cpu(in[0]);
+ z = le32_to_cpu(in[1]);
k0 = ctx->KEY[0];
k1 = ctx->KEY[1];
@@ -90,19 +83,20 @@ static void tea_encrypt(void *ctx_arg, u8 *dst, const u8 *src)
z += ((y << 4) + k2) ^ (y + sum) ^ ((y >> 5) + k3);
}
- u32_out (dst, y);
- u32_out (dst + 4, z);
+ out[0] = cpu_to_le32(y);
+ out[1] = cpu_to_le32(z);
}
-static void tea_decrypt(void *ctx_arg, u8 *dst, const u8 *src)
-{
+static void tea_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
+{
u32 y, z, n, sum;
u32 k0, k1, k2, k3;
+ struct tea_ctx *ctx = crypto_tfm_ctx(tfm);
+ const __le32 *in = (const __le32 *)src;
+ __le32 *out = (__le32 *)dst;
- struct tea_ctx *ctx = ctx_arg;
-
- y = u32_in (src);
- z = u32_in (src + 4);
+ y = le32_to_cpu(in[0]);
+ z = le32_to_cpu(in[1]);
k0 = ctx->KEY[0];
k1 = ctx->KEY[1];
@@ -119,42 +113,35 @@ static void tea_decrypt(void *ctx_arg, u8 *dst, const u8 *src)
sum -= TEA_DELTA;
}
- u32_out (dst, y);
- u32_out (dst + 4, z);
-
+ out[0] = cpu_to_le32(y);
+ out[1] = cpu_to_le32(z);
}
-static int xtea_setkey(void *ctx_arg, const u8 *in_key,
- unsigned int key_len, u32 *flags)
-{
-
- struct xtea_ctx *ctx = ctx_arg;
-
- if (key_len != 16)
- {
- *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
- return -EINVAL;
- }
+static int xtea_setkey(struct crypto_tfm *tfm, const u8 *in_key,
+ unsigned int key_len)
+{
+ struct xtea_ctx *ctx = crypto_tfm_ctx(tfm);
+ const __le32 *key = (const __le32 *)in_key;
- ctx->KEY[0] = u32_in (in_key);
- ctx->KEY[1] = u32_in (in_key + 4);
- ctx->KEY[2] = u32_in (in_key + 8);
- ctx->KEY[3] = u32_in (in_key + 12);
+ ctx->KEY[0] = le32_to_cpu(key[0]);
+ ctx->KEY[1] = le32_to_cpu(key[1]);
+ ctx->KEY[2] = le32_to_cpu(key[2]);
+ ctx->KEY[3] = le32_to_cpu(key[3]);
return 0;
}
-static void xtea_encrypt(void *ctx_arg, u8 *dst, const u8 *src)
-{
-
+static void xtea_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
+{
u32 y, z, sum = 0;
u32 limit = XTEA_DELTA * XTEA_ROUNDS;
+ struct xtea_ctx *ctx = crypto_tfm_ctx(tfm);
+ const __le32 *in = (const __le32 *)src;
+ __le32 *out = (__le32 *)dst;
- struct xtea_ctx *ctx = ctx_arg;
-
- y = u32_in (src);
- z = u32_in (src + 4);
+ y = le32_to_cpu(in[0]);
+ z = le32_to_cpu(in[1]);
while (sum != limit) {
y += ((z << 4 ^ z >> 5) + z) ^ (sum + ctx->KEY[sum&3]);
@@ -162,19 +149,19 @@ static void xtea_encrypt(void *ctx_arg, u8 *dst, const u8 *src)
z += ((y << 4 ^ y >> 5) + y) ^ (sum + ctx->KEY[sum>>11 &3]);
}
- u32_out (dst, y);
- u32_out (dst + 4, z);
-
+ out[0] = cpu_to_le32(y);
+ out[1] = cpu_to_le32(z);
}
-static void xtea_decrypt(void *ctx_arg, u8 *dst, const u8 *src)
-{
-
+static void xtea_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
+{
u32 y, z, sum;
- struct tea_ctx *ctx = ctx_arg;
+ struct tea_ctx *ctx = crypto_tfm_ctx(tfm);
+ const __le32 *in = (const __le32 *)src;
+ __le32 *out = (__le32 *)dst;
- y = u32_in (src);
- z = u32_in (src + 4);
+ y = le32_to_cpu(in[0]);
+ z = le32_to_cpu(in[1]);
sum = XTEA_DELTA * XTEA_ROUNDS;
@@ -184,22 +171,21 @@ static void xtea_decrypt(void *ctx_arg, u8 *dst, const u8 *src)
y -= ((z << 4 ^ z >> 5) + z) ^ (sum + ctx->KEY[sum & 3]);
}
- u32_out (dst, y);
- u32_out (dst + 4, z);
-
+ out[0] = cpu_to_le32(y);
+ out[1] = cpu_to_le32(z);
}
-static void xeta_encrypt(void *ctx_arg, u8 *dst, const u8 *src)
-{
-
+static void xeta_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
+{
u32 y, z, sum = 0;
u32 limit = XTEA_DELTA * XTEA_ROUNDS;
+ struct xtea_ctx *ctx = crypto_tfm_ctx(tfm);
+ const __le32 *in = (const __le32 *)src;
+ __le32 *out = (__le32 *)dst;
- struct xtea_ctx *ctx = ctx_arg;
-
- y = u32_in (src);
- z = u32_in (src + 4);
+ y = le32_to_cpu(in[0]);
+ z = le32_to_cpu(in[1]);
while (sum != limit) {
y += (z << 4 ^ z >> 5) + (z ^ sum) + ctx->KEY[sum&3];
@@ -207,19 +193,19 @@ static void xeta_encrypt(void *ctx_arg, u8 *dst, const u8 *src)
z += (y << 4 ^ y >> 5) + (y ^ sum) + ctx->KEY[sum>>11 &3];
}
- u32_out (dst, y);
- u32_out (dst + 4, z);
-
+ out[0] = cpu_to_le32(y);
+ out[1] = cpu_to_le32(z);
}
-static void xeta_decrypt(void *ctx_arg, u8 *dst, const u8 *src)
-{
-
+static void xeta_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
+{
u32 y, z, sum;
- struct tea_ctx *ctx = ctx_arg;
+ struct tea_ctx *ctx = crypto_tfm_ctx(tfm);
+ const __le32 *in = (const __le32 *)src;
+ __le32 *out = (__le32 *)dst;
- y = u32_in (src);
- z = u32_in (src + 4);
+ y = le32_to_cpu(in[0]);
+ z = le32_to_cpu(in[1]);
sum = XTEA_DELTA * XTEA_ROUNDS;
@@ -229,93 +215,66 @@ static void xeta_decrypt(void *ctx_arg, u8 *dst, const u8 *src)
y -= (z << 4 ^ z >> 5) + (z ^ sum) + ctx->KEY[sum & 3];
}
- u32_out (dst, y);
- u32_out (dst + 4, z);
-
+ out[0] = cpu_to_le32(y);
+ out[1] = cpu_to_le32(z);
}
-static struct crypto_alg tea_alg = {
+static struct crypto_alg tea_algs[3] = { {
.cra_name = "tea",
.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
.cra_blocksize = TEA_BLOCK_SIZE,
.cra_ctxsize = sizeof (struct tea_ctx),
+ .cra_alignmask = 3,
.cra_module = THIS_MODULE,
- .cra_list = LIST_HEAD_INIT(tea_alg.cra_list),
.cra_u = { .cipher = {
.cia_min_keysize = TEA_KEY_SIZE,
.cia_max_keysize = TEA_KEY_SIZE,
.cia_setkey = tea_setkey,
.cia_encrypt = tea_encrypt,
.cia_decrypt = tea_decrypt } }
-};
-
-static struct crypto_alg xtea_alg = {
+}, {
.cra_name = "xtea",
.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
.cra_blocksize = XTEA_BLOCK_SIZE,
.cra_ctxsize = sizeof (struct xtea_ctx),
+ .cra_alignmask = 3,
.cra_module = THIS_MODULE,
- .cra_list = LIST_HEAD_INIT(xtea_alg.cra_list),
.cra_u = { .cipher = {
.cia_min_keysize = XTEA_KEY_SIZE,
.cia_max_keysize = XTEA_KEY_SIZE,
.cia_setkey = xtea_setkey,
.cia_encrypt = xtea_encrypt,
.cia_decrypt = xtea_decrypt } }
-};
-
-static struct crypto_alg xeta_alg = {
+}, {
.cra_name = "xeta",
.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
.cra_blocksize = XTEA_BLOCK_SIZE,
.cra_ctxsize = sizeof (struct xtea_ctx),
+ .cra_alignmask = 3,
.cra_module = THIS_MODULE,
- .cra_list = LIST_HEAD_INIT(xtea_alg.cra_list),
.cra_u = { .cipher = {
.cia_min_keysize = XTEA_KEY_SIZE,
.cia_max_keysize = XTEA_KEY_SIZE,
.cia_setkey = xtea_setkey,
.cia_encrypt = xeta_encrypt,
.cia_decrypt = xeta_decrypt } }
-};
+} };
-static int __init init(void)
+static int __init tea_mod_init(void)
{
- int ret = 0;
-
- ret = crypto_register_alg(&tea_alg);
- if (ret < 0)
- goto out;
-
- ret = crypto_register_alg(&xtea_alg);
- if (ret < 0) {
- crypto_unregister_alg(&tea_alg);
- goto out;
- }
-
- ret = crypto_register_alg(&xeta_alg);
- if (ret < 0) {
- crypto_unregister_alg(&tea_alg);
- crypto_unregister_alg(&xtea_alg);
- goto out;
- }
-
-out:
- return ret;
+ return crypto_register_algs(tea_algs, ARRAY_SIZE(tea_algs));
}
-static void __exit fini(void)
+static void __exit tea_mod_fini(void)
{
- crypto_unregister_alg(&tea_alg);
- crypto_unregister_alg(&xtea_alg);
- crypto_unregister_alg(&xeta_alg);
+ crypto_unregister_algs(tea_algs, ARRAY_SIZE(tea_algs));
}
MODULE_ALIAS("xtea");
MODULE_ALIAS("xeta");
-module_init(init);
-module_exit(fini);
+module_init(tea_mod_init);
+module_exit(tea_mod_fini);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("TEA, XTEA & XETA Cryptographic Algorithms");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-05 21:35:26 +0000