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-rw-r--r--crypto/compress.c63
1 files changed, 63 insertions, 0 deletions
diff --git a/crypto/compress.c b/crypto/compress.c
new file mode 100644
index 00000000000..eb36d9364da
--- /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));
+}