1 files changed, 63 insertions, 0 deletions

diff --git a/crypto/compress.c b/crypto/compress.c
new file mode 100644
index 000000000000..eb36d9364da3
--- /dev/null
+++ b/crypto/compress.c
@@ -0,0 +1,63 @@
+/*
+ * Cryptographic API.
+ *
+ * Compression operations.
+ *
+ * Copyright (c) 2002 James Morris <jmorris@intercode.com.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/types.h>
+#include <linux/crypto.h>
+#include <linux/errno.h>
+#include <asm/scatterlist.h>
+#include <linux/string.h>
+#include "internal.h"
+
+static int crypto_compress(struct crypto_tfm *tfm,
+                            const u8 *src, unsigned int slen,
+                            u8 *dst, unsigned int *dlen)
+{
+        return tfm->__crt_alg->cra_compress.coa_compress(crypto_tfm_ctx(tfm),
+                                                         src, slen, dst,
+                                                         dlen);
+}
+
+static int crypto_decompress(struct crypto_tfm *tfm,
+                             const u8 *src, unsigned int slen,
+                             u8 *dst, unsigned int *dlen)
+{
+        return tfm->__crt_alg->cra_compress.coa_decompress(crypto_tfm_ctx(tfm),
+                                                           src, slen, dst,
+                                                           dlen);
+}
+
+int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags)
+{
+        return flags ? -EINVAL : 0;
+}
+
+int crypto_init_compress_ops(struct crypto_tfm *tfm)
+{
+        int ret = 0;
+        struct compress_tfm *ops = &tfm->crt_compress;
+        
+        ret = tfm->__crt_alg->cra_compress.coa_init(crypto_tfm_ctx(tfm));
+        if (ret)
+                goto out;
+
+        ops->cot_compress = crypto_compress;
+        ops->cot_decompress = crypto_decompress;
+        
+out:
+        return ret;
+}
+
+void crypto_exit_compress_ops(struct crypto_tfm *tfm)
+{
+        tfm->__crt_alg->cra_compress.coa_exit(crypto_tfm_ctx(tfm));
+}