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authorLinus Torvalds <torvalds@linux-foundation.org>2008-01-25 08:38:25 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2008-01-25 08:38:25 -0800
commiteba0e319c12fb098d66316a8eafbaaa9174a07c3 (patch)
treeb2703117db9e36bb3510654efd55361f61c54742 /crypto/lzo.c
parentdf8dc74e8a383eaf2d9b44b80a71ec6f0e52b42e (diff)
parent15e7b4452b72ae890f2fcb027b4c4fa63a1c9a7a (diff)
downloadop-kernel-dev-eba0e319c12fb098d66316a8eafbaaa9174a07c3.zip
op-kernel-dev-eba0e319c12fb098d66316a8eafbaaa9174a07c3.tar.gz
Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (125 commits) [CRYPTO] twofish: Merge common glue code [CRYPTO] hifn_795x: Fixup container_of() usage [CRYPTO] cast6: inline bloat-- [CRYPTO] api: Set default CRYPTO_MINALIGN to unsigned long long [CRYPTO] tcrypt: Make xcbc available as a standalone test [CRYPTO] xcbc: Remove bogus hash/cipher test [CRYPTO] xcbc: Fix algorithm leak when block size check fails [CRYPTO] tcrypt: Zero axbuf in the right function [CRYPTO] padlock: Only reset the key once for each CBC and ECB operation [CRYPTO] api: Include sched.h for cond_resched in scatterwalk.h [CRYPTO] salsa20-asm: Remove unnecessary dependency on CRYPTO_SALSA20 [CRYPTO] tcrypt: Add select of AEAD [CRYPTO] salsa20: Add x86-64 assembly version [CRYPTO] salsa20_i586: Salsa20 stream cipher algorithm (i586 version) [CRYPTO] gcm: Introduce rfc4106 [CRYPTO] api: Show async type [CRYPTO] chainiv: Avoid lock spinning where possible [CRYPTO] seqiv: Add select AEAD in Kconfig [CRYPTO] scatterwalk: Handle zero nbytes in scatterwalk_map_and_copy [CRYPTO] null: Allow setkey on digest_null ...
Diffstat (limited to 'crypto/lzo.c')
-rw-r--r--crypto/lzo.c106
1 files changed, 106 insertions, 0 deletions
diff --git a/crypto/lzo.c b/crypto/lzo.c
new file mode 100644
index 0000000..48c3288
--- /dev/null
+++ b/crypto/lzo.c
@@ -0,0 +1,106 @@
+/*
+ * Cryptographic API.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/crypto.h>
+#include <linux/vmalloc.h>
+#include <linux/lzo.h>
+
+struct lzo_ctx {
+ void *lzo_comp_mem;
+};
+
+static int lzo_init(struct crypto_tfm *tfm)
+{
+ struct lzo_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ ctx->lzo_comp_mem = vmalloc(LZO1X_MEM_COMPRESS);
+ if (!ctx->lzo_comp_mem)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static void lzo_exit(struct crypto_tfm *tfm)
+{
+ struct lzo_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ vfree(ctx->lzo_comp_mem);
+}
+
+static int lzo_compress(struct crypto_tfm *tfm, const u8 *src,
+ unsigned int slen, u8 *dst, unsigned int *dlen)
+{
+ struct lzo_ctx *ctx = crypto_tfm_ctx(tfm);
+ size_t tmp_len = *dlen; /* size_t(ulong) <-> uint on 64 bit */
+ int err;
+
+ err = lzo1x_1_compress(src, slen, dst, &tmp_len, ctx->lzo_comp_mem);
+
+ if (err != LZO_E_OK)
+ return -EINVAL;
+
+ *dlen = tmp_len;
+ return 0;
+}
+
+static int lzo_decompress(struct crypto_tfm *tfm, const u8 *src,
+ unsigned int slen, u8 *dst, unsigned int *dlen)
+{
+ int err;
+ size_t tmp_len = *dlen; /* size_t(ulong) <-> uint on 64 bit */
+
+ err = lzo1x_decompress_safe(src, slen, dst, &tmp_len);
+
+ if (err != LZO_E_OK)
+ return -EINVAL;
+
+ *dlen = tmp_len;
+ return 0;
+
+}
+
+static struct crypto_alg alg = {
+ .cra_name = "lzo",
+ .cra_flags = CRYPTO_ALG_TYPE_COMPRESS,
+ .cra_ctxsize = sizeof(struct lzo_ctx),
+ .cra_module = THIS_MODULE,
+ .cra_list = LIST_HEAD_INIT(alg.cra_list),
+ .cra_init = lzo_init,
+ .cra_exit = lzo_exit,
+ .cra_u = { .compress = {
+ .coa_compress = lzo_compress,
+ .coa_decompress = lzo_decompress } }
+};
+
+static int __init init(void)
+{
+ return crypto_register_alg(&alg);
+}
+
+static void __exit fini(void)
+{
+ crypto_unregister_alg(&alg);
+}
+
+module_init(init);
+module_exit(fini);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("LZO Compression Algorithm");
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