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authorAndrew Bartlett <abartlet@samba.org>2005-08-20 07:59:00 +0000
committerGerald (Jerry) Carter <jerry@samba.org>2007-10-10 13:33:37 -0500
commit684c824e9ac51ee2d6b748973757697a8ead2634 (patch)
tree5db08a22f4d5ae8707a44ce06e910ed7742dca1b /source4/lib/crypto
parent6baa6e0aa8dfd539a4fa3185a055eb8b1f4896c0 (diff)
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r9421: Move arcfour code into it's own file, in lib/crypto.
Andrew Bartlett (This used to be commit ca6cf462708810637544d4b4bef0f404fb89a002)
Diffstat (limited to 'source4/lib/crypto')
-rw-r--r--source4/lib/crypto/arcfour.c92
-rw-r--r--source4/lib/crypto/crypto.h6
-rw-r--r--source4/lib/crypto/hmacmd5.h2
3 files changed, 99 insertions, 1 deletions
diff --git a/source4/lib/crypto/arcfour.c b/source4/lib/crypto/arcfour.c
new file mode 100644
index 00000000000..cc5d2df5675
--- /dev/null
+++ b/source4/lib/crypto/arcfour.c
@@ -0,0 +1,92 @@
+/*
+ Unix SMB/CIFS implementation.
+
+ An implementation of the arcfour algorithm
+
+ Copyright (C) Andrew Tridgell 1998
+
+ 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.
+
+ 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include "includes.h"
+#include "lib/crypto/crypto.h"
+
+/* initialise the arcfour sbox with key */
+void arcfour_init(struct arcfour_state *state, const DATA_BLOB *key)
+{
+ int ind;
+ uint8_t j = 0;
+ for (ind = 0; ind < sizeof(state->sbox); ind++) {
+ state->sbox[ind] = (uint8_t)ind;
+ }
+
+ for (ind = 0; ind < sizeof(state->sbox); ind++) {
+ uint8_t tc;
+
+ j += (state->sbox[ind] + key->data[ind%key->length]);
+
+ tc = state->sbox[ind];
+ state->sbox[ind] = state->sbox[j];
+ state->sbox[j] = tc;
+ }
+ state->index_i = 0;
+ state->index_j = 0;
+}
+
+/* crypt the data with arcfour */
+void arcfour_crypt_sbox(struct arcfour_state *state, uint8_t *data, int len)
+{
+ int ind;
+
+ for (ind = 0; ind < len; ind++) {
+ uint8_t tc;
+ uint8_t t;
+
+ state->index_i++;
+ state->index_j += state->sbox[state->index_i];
+
+ tc = state->sbox[state->index_i];
+ state->sbox[state->index_i] = state->sbox[state->index_j];
+ state->sbox[state->index_j] = tc;
+
+ t = state->sbox[state->index_i] + state->sbox[state->index_j];
+ data[ind] = data[ind] ^ state->sbox[t];
+ }
+}
+
+/*
+ arcfour encryption with a blob key
+*/
+void arcfour_crypt_blob(uint8_t *data, int len, const DATA_BLOB *key)
+{
+ struct arcfour_state state;
+ arcfour_init(&state, key);
+ arcfour_crypt_sbox(&state, data, len);
+}
+
+/*
+ a variant that assumes a 16 byte key. This should be removed
+ when the last user is gone
+*/
+void arcfour_crypt(uint8_t *data, const uint8_t keystr[16], int len)
+{
+ DATA_BLOB key = data_blob(keystr, 16);
+
+ arcfour_crypt_blob(data, len, &key);
+
+ data_blob_free(&key);
+}
+
+
diff --git a/source4/lib/crypto/crypto.h b/source4/lib/crypto/crypto.h
index 8cf4b21aae4..19457f60dc5 100644
--- a/source4/lib/crypto/crypto.h
+++ b/source4/lib/crypto/crypto.h
@@ -28,3 +28,9 @@ struct arcfour_state {
uint8_t index_i;
uint8_t index_j;
};
+
+void arcfour_init(struct arcfour_state *state, const DATA_BLOB *key);
+void arcfour_crypt_sbox(struct arcfour_state *state, uint8_t *data, int len);
+void arcfour_crypt_blob(uint8_t *data, int len, const DATA_BLOB *key);
+void arcfour_crypt(uint8_t *data, const uint8_t keystr[16], int len);
+
diff --git a/source4/lib/crypto/hmacmd5.h b/source4/lib/crypto/hmacmd5.h
index fb6692a05f0..6ee195875ee 100644
--- a/source4/lib/crypto/hmacmd5.h
+++ b/source4/lib/crypto/hmacmd5.h
@@ -1,6 +1,6 @@
/*
Unix SMB/CIFS implementation.
- Interface header: Scheduler service
+ Interface header: HMAC MD5 code
Copyright (C) Luke Kenneth Casson Leighton 1996-1999
Copyright (C) Andrew Tridgell 1992-1999