2.4.22

 crypto

diff -urN linux-2.4.21/crypto/digest.c linux-2.4.22/crypto/digest.c
--- linux-2.4.21/crypto/digest.c   1969-12-31 16:00:00.000000000 -0800
+++ linux-2.4.22/crypto/digest.c   2003-08-25 04:44:40.000000000 -0700
@@ -0,0 +1,82 @@
+/*
+ * Cryptographic API.
+ *
+ * Digest 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/crypto.h>
+#include <linux/mm.h>
+#include <linux/errno.h>
+#include <linux/highmem.h>
+#include <asm/scatterlist.h>
+#include "internal.h"
+
+static void init(struct crypto_tfm *tfm)
+{
+   tfm->__crt_alg->cra_digest.dia_init(crypto_tfm_ctx(tfm));
+}
+
+static void update(struct crypto_tfm *tfm,
+                   struct scatterlist *sg, unsigned int nsg)
+{
+   unsigned int i;
+   
+   for (i = 0; i < nsg; i++) {
+      char *p = crypto_kmap(sg[i].page, 0) + sg[i].offset;
+      tfm->__crt_alg->cra_digest.dia_update(crypto_tfm_ctx(tfm),
+                                            p, sg[i].length);
+      crypto_kunmap(p, 0);
+      crypto_yield(tfm);
+   }
+}
+
+static void final(struct crypto_tfm *tfm, u8 *out)
+{
+   tfm->__crt_alg->cra_digest.dia_final(crypto_tfm_ctx(tfm), out);
+}
+
+static void digest(struct crypto_tfm *tfm,
+                   struct scatterlist *sg, unsigned int nsg, u8 *out)
+{
+   unsigned int i;
+
+   tfm->crt_digest.dit_init(tfm);
+      
+   for (i = 0; i < nsg; i++) {
+      char *p = crypto_kmap(sg[i].page, 0) + sg[i].offset;
+      tfm->__crt_alg->cra_digest.dia_update(crypto_tfm_ctx(tfm),
+                                            p, sg[i].length);
+      crypto_kunmap(p, 0);
+      crypto_yield(tfm);
+   }
+   crypto_digest_final(tfm, out);
+}
+
+int crypto_init_digest_flags(struct crypto_tfm *tfm, u32 flags)
+{
+   return flags ? -EINVAL : 0;
+}
+
+int crypto_init_digest_ops(struct crypto_tfm *tfm)
+{
+   struct digest_tfm *ops = &tfm->crt_digest;
+   
+   ops->dit_init   = init;
+   ops->dit_update   = update;
+   ops->dit_final   = final;
+   ops->dit_digest   = digest;
+   
+   return crypto_alloc_hmac_block(tfm);
+}
+
+void crypto_exit_digest_ops(struct crypto_tfm *tfm)
+{
+   crypto_free_hmac_block(tfm);
+}