diff options
Diffstat (limited to 'crypto/crypto_null.c')
| -rw-r--r-- | crypto/crypto_null.c | 28 |
1 files changed, 15 insertions, 13 deletions
diff --git a/crypto/crypto_null.c b/crypto/crypto_null.c index f691d31..3fcf6e8 100644 --- a/crypto/crypto_null.c +++ b/crypto/crypto_null.c @@ -21,6 +21,7 @@ #include <linux/mm.h> #include <asm/scatterlist.h> #include <linux/crypto.h> +#include <linux/string.h> #define NULL_KEY_SIZE 0 #define NULL_BLOCK_SIZE 1 @@ -28,11 +29,13 @@ static int null_compress(void *ctx, const u8 *src, unsigned int slen, u8 *dst, unsigned int *dlen) -{ return 0; } - -static int null_decompress(void *ctx, const u8 *src, unsigned int slen, - u8 *dst, unsigned int *dlen) -{ return 0; } +{ + if (slen > *dlen) + return -EINVAL; + memcpy(dst, src, slen); + *dlen = slen; + return 0; +} static void null_init(void *ctx) { } @@ -47,11 +50,10 @@ static int null_setkey(void *ctx, const u8 *key, unsigned int keylen, u32 *flags) { return 0; } -static void null_encrypt(void *ctx, u8 *dst, const u8 *src) -{ } - -static void null_decrypt(void *ctx, u8 *dst, const u8 *src) -{ } +static void null_crypt(void *ctx, u8 *dst, const u8 *src) +{ + memcpy(dst, src, NULL_BLOCK_SIZE); +} static struct crypto_alg compress_null = { .cra_name = "compress_null", @@ -62,7 +64,7 @@ static struct crypto_alg compress_null = { .cra_list = LIST_HEAD_INIT(compress_null.cra_list), .cra_u = { .compress = { .coa_compress = null_compress, - .coa_decompress = null_decompress } } + .coa_decompress = null_compress } } }; static struct crypto_alg digest_null = { @@ -90,8 +92,8 @@ static struct crypto_alg cipher_null = { .cia_min_keysize = NULL_KEY_SIZE, .cia_max_keysize = NULL_KEY_SIZE, .cia_setkey = null_setkey, - .cia_encrypt = null_encrypt, - .cia_decrypt = null_decrypt } } + .cia_encrypt = null_crypt, + .cia_decrypt = null_crypt } } }; MODULE_ALIAS("compress_null"); |