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Commit dd2514fe authored by Jon Oberheide's avatar Jon Oberheide Committed by Stephen Hemminger
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[CRYPTO]: Add ARC4 module.

parent 0db1f9e3
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Documentation/crypto/api-intro.txt
View file @ dd2514fe
......@@ -186,6 +186,7 @@ Original developers of the crypto algorithms:
Dag Arne Osvik (Serpent)
Brian Gladman (AES)
Kartikey Mahendra Bhatt (CAST6)
Jon Oberheide (ARC4)
SHA1 algorithm contributors:
Jean-Francois Dive
......
crypto/Kconfig
View file @ dd2514fe
......@@ -140,6 +140,16 @@ config CRYPTO_CAST6
The CAST6 encryption algorithm (synonymous with CAST-256) is
described in RFC2612.
config CRYPTO_ARC4
tristate "ARC4 cipher algorithm"
depends on CRYPTO
help
ARC4 cipher algorithm.
This is a stream cipher using keys ranging from 8 bits to 2048
bits in length. ARC4 is commonly used in protocols such as WEP
and SSL.
config CRYPTO_DEFLATE
tristate "Deflate compression algorithm"
depends on CRYPTO
......
crypto/Makefile
View file @ dd2514fe
......@@ -21,6 +21,7 @@ obj-$(CONFIG_CRYPTO_SERPENT) += serpent.o
obj-$(CONFIG_CRYPTO_AES) += aes.o
obj-$(CONFIG_CRYPTO_CAST5) += cast5.o
obj-$(CONFIG_CRYPTO_CAST6) += cast6.o
obj-$(CONFIG_CRYPTO_ARC4) += arc4.o
obj-$(CONFIG_CRYPTO_DEFLATE) += deflate.o
obj-$(CONFIG_CRYPTO_TEST) += tcrypt.o
crypto/arc4.c 0 → 100644
View file @ dd2514fe
/*
* Cryptographic API
*
* ARC4 Cipher Algorithm
*
* Jon Oberheide <jon@focalhost.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/module.h>
#include <linux/init.h>
#include <linux/crypto.h>
#define ARC4_MIN_KEY_SIZE 1
#define ARC4_MAX_KEY_SIZE 256
#define ARC4_BLOCK_SIZE 1
struct arc4_ctx {
u8 S[256];
u8 x, y;
};
static int arc4_set_key(void *ctx_arg, const u8 *in_key, unsigned int key_len, u32 *flags)
{
struct arc4_ctx *ctx = ctx_arg;
int i, j = 0, k = 0;
ctx->x = 1;
ctx->y = 0;
for(i = 0; i < 256; i++)
ctx->S[i] = i;
for(i = 0; i < 256; i++)
{
u8 a = ctx->S[i];
j = (j + in_key[k] + a) & 0xff;
ctx->S[i] = ctx->S[j];
ctx->S[j] = a;
if(++k >= key_len)
k = 0;
}
/* TODO: dump the first 768 bytes generated as recommended
by Ilya Mironov (http://eprint.iacr.org/2002/067/) to
increase the statistical strength of the state table */
return 0;
}
static void arc4_crypt(void *ctx_arg, u8 *out, const u8 *in)
{
struct arc4_ctx *ctx = ctx_arg;
u8 *const S = ctx->S;
u8 x = ctx->x;
u8 y = ctx->y;
u8 a = S[x];
y = (y + a) & 0xff;
u8 b = S[y];
S[x] = b;
S[y] = a;
x = (x + 1) & 0xff;
*out++ = *in ^ S[(a + b) & 0xff];
ctx->x = x;
ctx->y = y;
}
static struct crypto_alg arc4_alg = {
.cra_name = "arc4",
.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
.cra_blocksize = ARC4_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct arc4_ctx),
.cra_module = THIS_MODULE,
.cra_list = LIST_HEAD_INIT(arc4_alg.cra_list),
.cra_u = { .cipher = {
.cia_min_keysize = ARC4_MIN_KEY_SIZE,
.cia_max_keysize = ARC4_MAX_KEY_SIZE,
.cia_setkey = arc4_set_key,
.cia_encrypt = arc4_crypt,
.cia_decrypt = arc4_crypt } }
};
static int __init arc4_init(void)
{
return crypto_register_alg(&arc4_alg);
}
static void __exit arc4_exit(void)
{
crypto_unregister_alg(&arc4_alg);
}
module_init(arc4_init);
module_exit(arc4_exit);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("ARC4 Cipher Algorithm");
MODULE_AUTHOR("Jon Oberheide <jon@focalhost.com>");
crypto/tcrypt.c
View file @ dd2514fe
......@@ -61,7 +61,7 @@ static char *tvmem;
static char *check[] = {
"des", "md5", "des3_ede", "rot13", "sha1", "sha256", "blowfish",
"twofish", "serpent", "sha384", "sha512", "md4", "aes", "cast6",
"deflate", NULL
"arc4", "deflate", NULL
};
static void
......@@ -556,6 +556,10 @@ do_test(void)
test_cipher ("cast6", MODE_ECB, ENCRYPT, cast6_enc_tv_template, CAST6_ENC_TEST_VECTORS);
test_cipher ("cast6", MODE_ECB, DECRYPT, cast6_dec_tv_template, CAST6_DEC_TEST_VECTORS);
//ARC4
test_cipher ("arc4", MODE_ECB, ENCRYPT, arc4_enc_tv_template, ARC4_ENC_TEST_VECTORS);
test_cipher ("arc4x", MODE_ECB, DECRYPT, arc4_dec_tv_template, ARC4_DEC_TEST_VECTORS);
test_hash("sha384", sha384_tv_template, SHA384_TEST_VECTORS);
test_hash("sha512", sha512_tv_template, SHA512_TEST_VECTORS);
test_deflate();
......@@ -638,6 +642,11 @@ do_test(void)
test_cipher ("cast6", MODE_ECB, DECRYPT, cast6_dec_tv_template, CAST6_DEC_TEST_VECTORS);
break;
case 16:
test_cipher ("arc4", MODE_ECB, ENCRYPT, arc4_enc_tv_template, ARC4_ENC_TEST_VECTORS);
test_cipher ("arc4", MODE_ECB, DECRYPT, arc4_dec_tv_template, ARC4_DEC_TEST_VECTORS);
break;
#ifdef CONFIG_CRYPTO_HMAC
case 100:
test_hmac("md5", hmac_md5_tv_template, HMAC_MD5_TEST_VECTORS);
......
crypto/tcrypt.h
View file @ dd2514fe
......@@ -1488,6 +1488,147 @@ struct cipher_testvec cast5_dec_tv_template[] =
},
};
/*
* ARC4 test vectors from OpenSSL
*/
#define ARC4_ENC_TEST_VECTORS 7
#define ARC4_DEC_TEST_VECTORS 7
struct cipher_testvec arc4_enc_tv_template[] =
{
{
.key = { 0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef },
.klen = 8,
.input = { 0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef },
.ilen = 8,
.result = { 0x75, 0xb7, 0x87, 0x80, 0x99, 0xe0, 0xc5, 0x96 },
.rlen = 8,
}, {
.key = { 0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef },
.klen = 8,
.input = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
.ilen = 8,
.result = { 0x74, 0x94, 0xc2, 0xe7, 0x10, 0x4b, 0x08, 0x79 },
.rlen = 8,
}, {
.key = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
.klen = 8,
.input = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
.ilen = 8,
.result = { 0xde, 0x18, 0x89, 0x41, 0xa3, 0x37, 0x5d, 0x3a },
.rlen = 8,
}, {
.key = { 0xef, 0x01, 0x23, 0x45},
.klen = 4,
.input = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00 },
.ilen = 20,
.result = { 0xd6, 0xa1, 0x41, 0xa7, 0xec, 0x3c, 0x38, 0xdf,
0xbd, 0x61, 0x5a, 0x11, 0x62, 0xe1, 0xc7, 0xba,
0x36, 0xb6, 0x78, 0x58 },
.rlen = 20,
}, {
.key = { 0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef },
.klen = 8,
.input = { 0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC, 0xDE, 0xF0,
0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC, 0xDE, 0xF0,
0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC, 0xDE, 0xF0,
0x12, 0x34, 0x56, 0x78 },
.ilen = 28,
.result = { 0x66, 0xa0, 0x94, 0x9f, 0x8a, 0xf7, 0xd6, 0x89,
0x1f, 0x7f, 0x83, 0x2b, 0xa8, 0x33, 0xc0, 0x0c,
0x89, 0x2e, 0xbe, 0x30, 0x14, 0x3c, 0xe2, 0x87,
0x40, 0x01, 0x1e, 0xcf },
.rlen = 28,
}, {
.key = { 0xef, 0x01, 0x23, 0x45 },
.klen = 4,
.input = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00 },
.ilen = 10,
.result = { 0xd6, 0xa1, 0x41, 0xa7, 0xec, 0x3c, 0x38, 0xdf,
0xbd, 0x61 },
.rlen = 10,
}, {
.key = { 0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
.klen = 16,
.input = { 0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF },
.ilen = 8,
.result = { 0x69, 0x72, 0x36, 0x59, 0x1B, 0x52, 0x42, 0xB1 },
.rlen = 8,
},
};
struct cipher_testvec arc4_dec_tv_template[] =
{
{
.key = { 0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef },
.klen = 8,
.input = { 0x75, 0xb7, 0x87, 0x80, 0x99, 0xe0, 0xc5, 0x96 },
.ilen = 8,
.result = { 0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef },
.rlen = 8,
}, {
.key = { 0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef },
.klen = 8,
.input = { 0x74, 0x94, 0xc2, 0xe7, 0x10, 0x4b, 0x08, 0x79 },
.ilen = 8,
.result = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
.rlen = 8,
}, {
.key = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
.klen = 8,
.input = { 0xde, 0x18, 0x89, 0x41, 0xa3, 0x37, 0x5d, 0x3a },
.ilen = 8,
.result = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
.rlen = 8,
}, {
.key = { 0xef, 0x01, 0x23, 0x45},
.klen = 4,
.input = { 0xd6, 0xa1, 0x41, 0xa7, 0xec, 0x3c, 0x38, 0xdf,
0xbd, 0x61, 0x5a, 0x11, 0x62, 0xe1, 0xc7, 0xba,
0x36, 0xb6, 0x78, 0x58 },
.ilen = 20,
.result = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00 },
.rlen = 20,
}, {
.key = { 0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef },
.klen = 8,
.input = { 0x66, 0xa0, 0x94, 0x9f, 0x8a, 0xf7, 0xd6, 0x89,
0x1f, 0x7f, 0x83, 0x2b, 0xa8, 0x33, 0xc0, 0x0c,
0x89, 0x2e, 0xbe, 0x30, 0x14, 0x3c, 0xe2, 0x87,
0x40, 0x01, 0x1e, 0xcf },
.ilen = 28,
.result = { 0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC, 0xDE, 0xF0,
0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC, 0xDE, 0xF0,
0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC, 0xDE, 0xF0,
0x12, 0x34, 0x56, 0x78 },
.rlen = 28,
}, {
.key = { 0xef, 0x01, 0x23, 0x45 },
.klen = 4,
.input = { 0xd6, 0xa1, 0x41, 0xa7, 0xec, 0x3c, 0x38, 0xdf,
0xbd, 0x61 },
.ilen = 10,
.result = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00 },
.rlen = 10,
}, {
.key = { 0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 },
.klen = 16,
.input = { 0x69, 0x72, 0x36, 0x59, 0x1B, 0x52, 0x42, 0xB1 },
.ilen = 8,
.result = { 0x01, 0x23, 0x45, 0x67, 0x89, 0xAB, 0xCD, 0xEF },
.rlen = 8,
},
};
/*
* Compression stuff.
*/
......
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