[CRYPTO]: Fix XTEA implementation

The XTEA implementation was incorrect due to a misinterpretation of
operator precedence.  Because of the wide-spread nature of this
error, the erroneous implementation will be kept, albeit under the
new name of XETA.

Signed-off-by: Aaron Grothe <ajgrothe@yahoo.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

5 files changed, 207 insertions, 29 deletions

diff --git a/Documentation/crypto/api-intro.txt b/Documentation/crypto/api-intro.txt
index a2d5b4900772..74dffc68ff9f 100644
--- a/Documentation/crypto/api-intro.txt
+++ b/Documentation/crypto/api-intro.txt
@@ -223,6 +223,7 @@ CAST5 algorithm contributors:
 
 TEA/XTEA algorithm contributors:
   Aaron Grothe
+  Michael Ringe
 
 Khazad algorithm contributors:
   Aaron Grothe
diff --git a/crypto/Kconfig b/crypto/Kconfig
index 256c0b1fed10..89299f4ffe12 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -219,7 +219,7 @@ config CRYPTO_CAST6
           described in RFC2612.
 
 config CRYPTO_TEA
-        tristate "TEA and XTEA cipher algorithms"
+        tristate "TEA, XTEA and XETA cipher algorithms"
         depends on CRYPTO
         help
           TEA cipher algorithm.
@@ -232,6 +232,9 @@ config CRYPTO_TEA
           the TEA algorithm to address a potential key weakness
           in the TEA algorithm.
 
+          Xtendend Encryption Tiny Algorithm is a mis-implementation 
+          of the XTEA algorithm for compatibility purposes.
+
 config CRYPTO_ARC4
         tristate "ARC4 cipher algorithm"
         depends on CRYPTO
diff --git a/crypto/tcrypt.c b/crypto/tcrypt.c
index bd7524cfff33..68639419c5bd 100644
--- a/crypto/tcrypt.c
+++ b/crypto/tcrypt.c
@@ -72,7 +72,7 @@ static char *check[] = {
         "des", "md5", "des3_ede", "rot13", "sha1", "sha256", "blowfish",
         "twofish", "serpent", "sha384", "sha512", "md4", "aes", "cast6",
         "arc4", "michael_mic", "deflate", "crc32c", "tea", "xtea",
-        "khazad", "wp512", "wp384", "wp256", "tnepres", NULL
+        "khazad", "wp512", "wp384", "wp256", "tnepres", "xeta", NULL
 };
 
 static void hexdump(unsigned char *buf, unsigned int len)
@@ -859,6 +859,10 @@ static void do_test(void)
                 test_cipher ("anubis", MODE_CBC, ENCRYPT, anubis_cbc_enc_tv_template, ANUBIS_CBC_ENC_TEST_VECTORS);
                 test_cipher ("anubis", MODE_CBC, DECRYPT, anubis_cbc_dec_tv_template, ANUBIS_CBC_ENC_TEST_VECTORS);
 
+                //XETA
+                test_cipher ("xeta", MODE_ECB, ENCRYPT, xeta_enc_tv_template, XETA_ENC_TEST_VECTORS);
+                test_cipher ("xeta", MODE_ECB, DECRYPT, xeta_dec_tv_template, XETA_DEC_TEST_VECTORS);
+
                 test_hash("sha384", sha384_tv_template, SHA384_TEST_VECTORS);
                 test_hash("sha512", sha512_tv_template, SHA512_TEST_VECTORS);
                 test_hash("wp512", wp512_tv_template, WP512_TEST_VECTORS);
@@ -1016,6 +1020,11 @@ static void do_test(void)
         case 29:
                 test_hash("tgr128", tgr128_tv_template, TGR128_TEST_VECTORS);
                 break;
+                
+        case 30:
+                test_cipher ("xeta", MODE_ECB, ENCRYPT, xeta_enc_tv_template, XETA_ENC_TEST_VECTORS);
+                test_cipher ("xeta", MODE_ECB, DECRYPT, xeta_dec_tv_template, XETA_DEC_TEST_VECTORS);
+                break;
 
 #ifdef CONFIG_CRYPTO_HMAC
         case 100:
diff --git a/crypto/tcrypt.h b/crypto/tcrypt.h
index c01a0ce9b40a..522ffd4b6f43 100644
--- a/crypto/tcrypt.h
+++ b/crypto/tcrypt.h
@@ -2211,7 +2211,7 @@ static struct cipher_testvec xtea_enc_tv_template[] = {
                 .klen   = 16,
                 .input  = { [0 ... 8] = 0x00 },
                 .ilen   = 8,
-                .result = { 0xaa, 0x22, 0x96, 0xe5, 0x6c, 0x61, 0xf3, 0x45 },
+                .result = { 0xd8, 0xd4, 0xe9, 0xde, 0xd9, 0x1e, 0x13, 0xf7 },
                 .rlen   = 8,
         }, {
                 .key    = { 0x2b, 0x02, 0x05, 0x68, 0x06, 0x14, 0x49, 0x76,
@@ -2219,31 +2219,31 @@ static struct cipher_testvec xtea_enc_tv_template[] = {
                 .klen   = 16,
                 .input  = { 0x74, 0x65, 0x73, 0x74, 0x20, 0x6d, 0x65, 0x2e },
                 .ilen   = 8,
-                .result = { 0x82, 0x3e, 0xeb, 0x35, 0xdc, 0xdd, 0xd9, 0xc3 },
+                .result = { 0x94, 0xeb, 0xc8, 0x96, 0x84, 0x6a, 0x49, 0xa8 },
                 .rlen   = 8,
         }, {
                 .key    = { 0x09, 0x65, 0x43, 0x11, 0x66, 0x44, 0x39, 0x25,
                             0x51, 0x3a, 0x16, 0x10, 0x0a, 0x08, 0x12, 0x6e },
                 .klen   = 16,
-                .input  = { 0x6c, 0x6f, 0x6e, 0x67, 0x65, 0x72, 0x5f, 0x74,
+                .input  = { 0x3e, 0xce, 0xae, 0x22, 0x60, 0x56, 0xa8, 0x9d,
                             0x65, 0x73, 0x74, 0x5f, 0x76, 0x65, 0x63, 0x74 },
                 .ilen   = 16,
-                .result = { 0xe2, 0x04, 0xdb, 0xf2, 0x89, 0x85, 0x9e, 0xea,
+                .result = { 0xe2, 0x04, 0xdb, 0xf2, 0x89, 0x85, 0x9e, 0xea, 
                             0x61, 0x35, 0xaa, 0xed, 0xb5, 0xcb, 0x71, 0x2c },
                 .rlen   = 16,
         }, {
                 .key    = { 0x4d, 0x76, 0x32, 0x17, 0x05, 0x3f, 0x75, 0x2c,
                             0x5d, 0x04, 0x16, 0x36, 0x15, 0x72, 0x63, 0x2f },
                 .klen   = 16,
-                .input  = { 0x54, 0x65, 0x61, 0x20, 0x69, 0x73, 0x20, 0x67,
-                            0x6f, 0x6f, 0x64, 0x20, 0x66, 0x6f, 0x72, 0x20,
-                            0x79, 0x6f, 0x75, 0x21, 0x21, 0x21, 0x20, 0x72,
+                .input  = { 0x54, 0x65, 0x61, 0x20, 0x69, 0x73, 0x20, 0x67, 
+                            0x6f, 0x6f, 0x64, 0x20, 0x66, 0x6f, 0x72, 0x20, 
+                            0x79, 0x6f, 0x75, 0x21, 0x21, 0x21, 0x20, 0x72, 
                             0x65, 0x61, 0x6c, 0x6c, 0x79, 0x21, 0x21, 0x21 },
                 .ilen   = 32,
-                .result = { 0x0b, 0x03, 0xcd, 0x8a, 0xbe, 0x95, 0xfd, 0xb1,
-                            0xc1, 0x44, 0x91, 0x0b, 0xa5, 0xc9, 0x1b, 0xb4,
-                            0xa9, 0xda, 0x1e, 0x9e, 0xb1, 0x3e, 0x2a, 0x8f,
-                            0xea, 0xa5, 0x6a, 0x85, 0xd1, 0xf4, 0xa8, 0xa5 },
+                .result = { 0x99, 0x81, 0x9f, 0x5d, 0x6f, 0x4b, 0x31, 0x3a,
+                            0x86, 0xff, 0x6f, 0xd0, 0xe3, 0x87, 0x70, 0x07,
+                            0x4d, 0xb8, 0xcf, 0xf3, 0x99, 0x50, 0xb3, 0xd4,
+                            0x73, 0xa2, 0xfa, 0xc9, 0x16, 0x59, 0x5d, 0x81 },
                 .rlen   = 32,
         }
 };
@@ -2252,7 +2252,7 @@ static struct cipher_testvec xtea_dec_tv_template[] = {
         {
                 .key    = { [0 ... 15] = 0x00 },
                 .klen   = 16,
-                .input  = { 0xaa, 0x22, 0x96, 0xe5, 0x6c, 0x61, 0xf3, 0x45 },
+                .input  = { 0xd8, 0xd4, 0xe9, 0xde, 0xd9, 0x1e, 0x13, 0xf7 },
                 .ilen   = 8,
                 .result = { [0 ... 8] = 0x00 },
                 .rlen   = 8,
@@ -2260,7 +2260,7 @@ static struct cipher_testvec xtea_dec_tv_template[] = {
                 .key    = { 0x2b, 0x02, 0x05, 0x68, 0x06, 0x14, 0x49, 0x76,
                             0x77, 0x5d, 0x0e, 0x26, 0x6c, 0x28, 0x78, 0x43 },
                 .klen   = 16,
-                .input  = { 0x82, 0x3e, 0xeb, 0x35, 0xdc, 0xdd, 0xd9, 0xc3 },
+                .input  = { 0x94, 0xeb, 0xc8, 0x96, 0x84, 0x6a, 0x49, 0xa8 },
                 .ilen   = 8,
                 .result = { 0x74, 0x65, 0x73, 0x74, 0x20, 0x6d, 0x65, 0x2e },
                 .rlen   = 8,
@@ -2268,24 +2268,24 @@ static struct cipher_testvec xtea_dec_tv_template[] = {
                 .key    = { 0x09, 0x65, 0x43, 0x11, 0x66, 0x44, 0x39, 0x25,
                             0x51, 0x3a, 0x16, 0x10, 0x0a, 0x08, 0x12, 0x6e },
                 .klen   = 16,
-                .input  = { 0xe2, 0x04, 0xdb, 0xf2, 0x89, 0x85, 0x9e, 0xea,
-                            0x61, 0x35, 0xaa, 0xed, 0xb5, 0xcb, 0x71, 0x2c },
+                .input  = { 0x3e, 0xce, 0xae, 0x22, 0x60, 0x56, 0xa8, 0x9d,
+                            0x77, 0x4d, 0xd4, 0xb4, 0x87, 0x24, 0xe3, 0x9a },
                 .ilen   = 16,
-                .result = { 0x6c, 0x6f, 0x6e, 0x67, 0x65, 0x72, 0x5f, 0x74,
+                .result = { 0x6c, 0x6f, 0x6e, 0x67, 0x65, 0x72, 0x5f, 0x74, 
                             0x65, 0x73, 0x74, 0x5f, 0x76, 0x65, 0x63, 0x74 },
                 .rlen   = 16,
         }, {
                 .key    = { 0x4d, 0x76, 0x32, 0x17, 0x05, 0x3f, 0x75, 0x2c,
                             0x5d, 0x04, 0x16, 0x36, 0x15, 0x72, 0x63, 0x2f },
                 .klen   = 16,
-                .input  = { 0x0b, 0x03, 0xcd, 0x8a, 0xbe, 0x95, 0xfd, 0xb1,
-                            0xc1, 0x44, 0x91, 0x0b, 0xa5, 0xc9, 0x1b, 0xb4,
-                            0xa9, 0xda, 0x1e, 0x9e, 0xb1, 0x3e, 0x2a, 0x8f,
-                            0xea, 0xa5, 0x6a, 0x85, 0xd1, 0xf4, 0xa8, 0xa5 },
+                .input  = { 0x99, 0x81, 0x9f, 0x5d, 0x6f, 0x4b, 0x31, 0x3a,
+                            0x86, 0xff, 0x6f, 0xd0, 0xe3, 0x87, 0x70, 0x07,
+                            0x4d, 0xb8, 0xcf, 0xf3, 0x99, 0x50, 0xb3, 0xd4,
+                            0x73, 0xa2, 0xfa, 0xc9, 0x16, 0x59, 0x5d, 0x81 },
                 .ilen   = 32,
-                .result = { 0x54, 0x65, 0x61, 0x20, 0x69, 0x73, 0x20, 0x67,
-                            0x6f, 0x6f, 0x64, 0x20, 0x66, 0x6f, 0x72, 0x20,
-                            0x79, 0x6f, 0x75, 0x21, 0x21, 0x21, 0x20, 0x72,
+                .result = { 0x54, 0x65, 0x61, 0x20, 0x69, 0x73, 0x20, 0x67, 
+                            0x6f, 0x6f, 0x64, 0x20, 0x66, 0x6f, 0x72, 0x20, 
+                            0x79, 0x6f, 0x75, 0x21, 0x21, 0x21, 0x20, 0x72, 
                             0x65, 0x61, 0x6c, 0x6c, 0x79, 0x21, 0x21, 0x21 },
                 .rlen   = 32,
         }
@@ -2594,6 +2594,98 @@ static struct cipher_testvec anubis_cbc_dec_tv_template[] = {
         },
 };
 
+/* 
+ * XETA test vectors 
+ */
+#define XETA_ENC_TEST_VECTORS   4
+#define XETA_DEC_TEST_VECTORS   4
+
+static struct cipher_testvec xeta_enc_tv_template[] = {
+        {
+                .key    = { [0 ... 15] = 0x00 },
+                .klen   = 16,
+                .input  = { [0 ... 8] = 0x00 },
+                .ilen   = 8,
+                .result = { 0xaa, 0x22, 0x96, 0xe5, 0x6c, 0x61, 0xf3, 0x45 },
+                .rlen   = 8,
+        }, {
+                .key    = { 0x2b, 0x02, 0x05, 0x68, 0x06, 0x14, 0x49, 0x76,
+                            0x77, 0x5d, 0x0e, 0x26, 0x6c, 0x28, 0x78, 0x43 },
+                .klen   = 16,
+                .input  = { 0x74, 0x65, 0x73, 0x74, 0x20, 0x6d, 0x65, 0x2e },
+                .ilen   = 8,
+                .result = { 0x82, 0x3e, 0xeb, 0x35, 0xdc, 0xdd, 0xd9, 0xc3 },
+                .rlen   = 8,
+        }, {
+                .key    = { 0x09, 0x65, 0x43, 0x11, 0x66, 0x44, 0x39, 0x25,
+                            0x51, 0x3a, 0x16, 0x10, 0x0a, 0x08, 0x12, 0x6e },
+                .klen   = 16,
+                .input  = { 0x6c, 0x6f, 0x6e, 0x67, 0x65, 0x72, 0x5f, 0x74, 
+                            0x65, 0x73, 0x74, 0x5f, 0x76, 0x65, 0x63, 0x74 },
+                .ilen   = 16,
+                .result = { 0xe2, 0x04, 0xdb, 0xf2, 0x89, 0x85, 0x9e, 0xea, 
+                            0x61, 0x35, 0xaa, 0xed, 0xb5, 0xcb, 0x71, 0x2c },
+                .rlen   = 16,
+        }, {
+                .key    = { 0x4d, 0x76, 0x32, 0x17, 0x05, 0x3f, 0x75, 0x2c,
+                            0x5d, 0x04, 0x16, 0x36, 0x15, 0x72, 0x63, 0x2f },
+                .klen   = 16,
+                .input  = { 0x54, 0x65, 0x61, 0x20, 0x69, 0x73, 0x20, 0x67, 
+                            0x6f, 0x6f, 0x64, 0x20, 0x66, 0x6f, 0x72, 0x20, 
+                            0x79, 0x6f, 0x75, 0x21, 0x21, 0x21, 0x20, 0x72, 
+                            0x65, 0x61, 0x6c, 0x6c, 0x79, 0x21, 0x21, 0x21 },
+                .ilen   = 32,
+                .result = { 0x0b, 0x03, 0xcd, 0x8a, 0xbe, 0x95, 0xfd, 0xb1, 
+                            0xc1, 0x44, 0x91, 0x0b, 0xa5, 0xc9, 0x1b, 0xb4, 
+                            0xa9, 0xda, 0x1e, 0x9e, 0xb1, 0x3e, 0x2a, 0x8f, 
+                            0xea, 0xa5, 0x6a, 0x85, 0xd1, 0xf4, 0xa8, 0xa5 },
+                .rlen   = 32,
+        }
+};
+
+static struct cipher_testvec xeta_dec_tv_template[] = {
+        {
+                .key    = { [0 ... 15] = 0x00 },
+                .klen   = 16,
+                .input  = { 0xaa, 0x22, 0x96, 0xe5, 0x6c, 0x61, 0xf3, 0x45 },
+                .ilen   = 8,
+                .result = { [0 ... 8] = 0x00 },
+                .rlen   = 8,
+        }, {
+                .key    = { 0x2b, 0x02, 0x05, 0x68, 0x06, 0x14, 0x49, 0x76,
+                            0x77, 0x5d, 0x0e, 0x26, 0x6c, 0x28, 0x78, 0x43 },
+                .klen   = 16,
+                .input  = { 0x82, 0x3e, 0xeb, 0x35, 0xdc, 0xdd, 0xd9, 0xc3 },
+                .ilen   = 8,
+                .result = { 0x74, 0x65, 0x73, 0x74, 0x20, 0x6d, 0x65, 0x2e },
+                .rlen   = 8,
+        }, {
+                .key    = { 0x09, 0x65, 0x43, 0x11, 0x66, 0x44, 0x39, 0x25,
+                            0x51, 0x3a, 0x16, 0x10, 0x0a, 0x08, 0x12, 0x6e },
+                .klen   = 16,
+                .input  = { 0xe2, 0x04, 0xdb, 0xf2, 0x89, 0x85, 0x9e, 0xea, 
+                            0x61, 0x35, 0xaa, 0xed, 0xb5, 0xcb, 0x71, 0x2c },
+                .ilen   = 16,
+                .result = { 0x6c, 0x6f, 0x6e, 0x67, 0x65, 0x72, 0x5f, 0x74, 
+                            0x65, 0x73, 0x74, 0x5f, 0x76, 0x65, 0x63, 0x74 },
+                .rlen   = 16,
+        }, {
+                .key    = { 0x4d, 0x76, 0x32, 0x17, 0x05, 0x3f, 0x75, 0x2c,
+                            0x5d, 0x04, 0x16, 0x36, 0x15, 0x72, 0x63, 0x2f },
+                .klen   = 16,
+                .input  = { 0x0b, 0x03, 0xcd, 0x8a, 0xbe, 0x95, 0xfd, 0xb1, 
+                            0xc1, 0x44, 0x91, 0x0b, 0xa5, 0xc9, 0x1b, 0xb4, 
+                            0xa9, 0xda, 0x1e, 0x9e, 0xb1, 0x3e, 0x2a, 0x8f, 
+                            0xea, 0xa5, 0x6a, 0x85, 0xd1, 0xf4, 0xa8, 0xa5 },
+                .ilen   = 32,
+                .result = { 0x54, 0x65, 0x61, 0x20, 0x69, 0x73, 0x20, 0x67, 
+                            0x6f, 0x6f, 0x64, 0x20, 0x66, 0x6f, 0x72, 0x20, 
+                            0x79, 0x6f, 0x75, 0x21, 0x21, 0x21, 0x20, 0x72, 
+                            0x65, 0x61, 0x6c, 0x6c, 0x79, 0x21, 0x21, 0x21 },
+                .rlen   = 32,
+        }
+};
+
 /*
  * Compression stuff.
  */
diff --git a/crypto/tea.c b/crypto/tea.c
index 03c23cbd3afa..5924efdd3a16 100644
--- a/crypto/tea.c
+++ b/crypto/tea.c
@@ -1,11 +1,15 @@
 /* 
  * Cryptographic API.
  *
- * TEA and Xtended TEA Algorithms
+ * TEA, XTEA, and XETA crypto alogrithms
  *
  * The TEA and Xtended TEA algorithms were developed by David Wheeler 
  * and Roger Needham at the Computer Laboratory of Cambridge University.
  *
+ * Due to the order of evaluation in XTEA many people have incorrectly
+ * implemented it.  XETA (XTEA in the wrong order), exists for
+ * compatibility with these implementations.
+ *
  * Copyright (c) 2004 Aaron Grothe ajgrothe@yahoo.com
  *
  * This program is free software; you can redistribute it and/or modify
@@ -153,9 +157,9 @@ static void xtea_encrypt(void *ctx_arg, u8 *dst, const u8 *src)
         z = u32_in (src + 4);
 
         while (sum != limit) {
-                y += (z << 4 ^ z >> 5) + (z ^ sum) + ctx->KEY[sum&3]; 
+                y += ((z << 4 ^ z >> 5) + z) ^ (sum + ctx->KEY[sum&3]); 
                 sum += XTEA_DELTA;
-                z += (y << 4 ^ y >> 5) + (y ^ sum) + ctx->KEY[sum>>11 &3]; 
+                z += ((y << 4 ^ y >> 5) + y) ^ (sum + ctx->KEY[sum>>11 &3]); 
         }
         
         u32_out (dst, y);
@@ -175,6 +179,51 @@ static void xtea_decrypt(void *ctx_arg, u8 *dst, const u8 *src)
         sum = XTEA_DELTA * XTEA_ROUNDS;
 
         while (sum) {
+                z -= ((y << 4 ^ y >> 5) + y) ^ (sum + ctx->KEY[sum>>11 & 3]);
+                sum -= XTEA_DELTA;
+                y -= ((z << 4 ^ z >> 5) + z) ^ (sum + ctx->KEY[sum & 3]);
+        }
+        
+        u32_out (dst, y);
+        u32_out (dst + 4, z);
+
+}
+
+
+static void xeta_encrypt(void *ctx_arg, u8 *dst, const u8 *src)
+{ 
+
+        u32 y, z, sum = 0;
+        u32 limit = XTEA_DELTA * XTEA_ROUNDS;
+
+        struct xtea_ctx *ctx = ctx_arg;
+
+        y = u32_in (src);
+        z = u32_in (src + 4);
+
+        while (sum != limit) {
+                y += (z << 4 ^ z >> 5) + (z ^ sum) + ctx->KEY[sum&3];
+                sum += XTEA_DELTA;
+                z += (y << 4 ^ y >> 5) + (y ^ sum) + ctx->KEY[sum>>11 &3];
+        }
+        
+        u32_out (dst, y);
+        u32_out (dst + 4, z);
+
+}
+
+static void xeta_decrypt(void *ctx_arg, u8 *dst, const u8 *src)
+{ 
+
+        u32 y, z, sum;
+        struct tea_ctx *ctx = ctx_arg;
+
+        y = u32_in (src);
+        z = u32_in (src + 4);
+
+        sum = XTEA_DELTA * XTEA_ROUNDS;
+
+        while (sum) {
                 z -= (y << 4 ^ y >> 5) + (y ^ sum) + ctx->KEY[sum>>11 & 3];
                 sum -= XTEA_DELTA;
                 y -= (z << 4 ^ z >> 5) + (z ^ sum) + ctx->KEY[sum & 3];
@@ -215,6 +264,21 @@ static struct crypto_alg xtea_alg = {
         .cia_decrypt            =       xtea_decrypt } }
 };
 
+static struct crypto_alg xeta_alg = {
+        .cra_name               =       "xeta",
+        .cra_flags              =       CRYPTO_ALG_TYPE_CIPHER,
+        .cra_blocksize          =       XTEA_BLOCK_SIZE,
+        .cra_ctxsize            =       sizeof (struct xtea_ctx),
+        .cra_module             =       THIS_MODULE,
+        .cra_list               =       LIST_HEAD_INIT(xtea_alg.cra_list),
+        .cra_u                  =       { .cipher = {
+        .cia_min_keysize        =       XTEA_KEY_SIZE,
+        .cia_max_keysize        =       XTEA_KEY_SIZE,
+        .cia_setkey             =       xtea_setkey,
+        .cia_encrypt            =       xeta_encrypt,
+        .cia_decrypt            =       xeta_decrypt } }
+};
+
 static int __init init(void)
 {
         int ret = 0;
@@ -229,6 +293,13 @@ static int __init init(void)
                 goto out;
         }
 
+        ret = crypto_register_alg(&xeta_alg);
+        if (ret < 0) {
+                crypto_unregister_alg(&tea_alg);
+                crypto_unregister_alg(&xtea_alg);
+                goto out;
+        }
+
 out:    
         return ret;
 }
@@ -237,12 +308,14 @@ static void __exit fini(void)
 {
         crypto_unregister_alg(&tea_alg);
         crypto_unregister_alg(&xtea_alg);
+        crypto_unregister_alg(&xeta_alg);
 }
 
 MODULE_ALIAS("xtea");
+MODULE_ALIAS("xeta");
 
 module_init(init);
 module_exit(fini);
 
 MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("TEA & XTEA Cryptographic Algorithms");
+MODULE_DESCRIPTION("TEA, XTEA & XETA Cryptographic Algorithms");