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[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>
This commit is contained in:
Aaron Grothe
David S. Miller
parent
75c80c382f
commit
fb4f10ed50
5 changed files with 207 additions and 29 deletions
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@ -223,6 +223,7 @@ CAST5 algorithm contributors:
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TEA/XTEA algorithm contributors:
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Aaron Grothe
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Michael Ringe
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Khazad algorithm contributors:
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Aaron Grothe
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@ -219,7 +219,7 @@ config CRYPTO_CAST6
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described in RFC2612.
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config CRYPTO_TEA
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tristate "TEA and XTEA cipher algorithms"
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tristate "TEA, XTEA and XETA cipher algorithms"
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depends on CRYPTO
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help
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TEA cipher algorithm.
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@ -232,6 +232,9 @@ config CRYPTO_TEA
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the TEA algorithm to address a potential key weakness
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in the TEA algorithm.
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Xtendend Encryption Tiny Algorithm is a mis-implementation
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of the XTEA algorithm for compatibility purposes.
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config CRYPTO_ARC4
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tristate "ARC4 cipher algorithm"
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depends on CRYPTO
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@ -72,7 +72,7 @@ static char *check[] = {
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"des", "md5", "des3_ede", "rot13", "sha1", "sha256", "blowfish",
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"twofish", "serpent", "sha384", "sha512", "md4", "aes", "cast6",
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"arc4", "michael_mic", "deflate", "crc32c", "tea", "xtea",
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"khazad", "wp512", "wp384", "wp256", "tnepres", NULL
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"khazad", "wp512", "wp384", "wp256", "tnepres", "xeta", NULL
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};
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static void hexdump(unsigned char *buf, unsigned int len)
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@ -859,6 +859,10 @@ static void do_test(void)
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test_cipher ("anubis", MODE_CBC, ENCRYPT, anubis_cbc_enc_tv_template, ANUBIS_CBC_ENC_TEST_VECTORS);
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test_cipher ("anubis", MODE_CBC, DECRYPT, anubis_cbc_dec_tv_template, ANUBIS_CBC_ENC_TEST_VECTORS);
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//XETA
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test_cipher ("xeta", MODE_ECB, ENCRYPT, xeta_enc_tv_template, XETA_ENC_TEST_VECTORS);
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test_cipher ("xeta", MODE_ECB, DECRYPT, xeta_dec_tv_template, XETA_DEC_TEST_VECTORS);
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test_hash("sha384", sha384_tv_template, SHA384_TEST_VECTORS);
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test_hash("sha512", sha512_tv_template, SHA512_TEST_VECTORS);
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test_hash("wp512", wp512_tv_template, WP512_TEST_VECTORS);
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@ -1016,6 +1020,11 @@ static void do_test(void)
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case 29:
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test_hash("tgr128", tgr128_tv_template, TGR128_TEST_VECTORS);
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break;
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case 30:
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test_cipher ("xeta", MODE_ECB, ENCRYPT, xeta_enc_tv_template, XETA_ENC_TEST_VECTORS);
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test_cipher ("xeta", MODE_ECB, DECRYPT, xeta_dec_tv_template, XETA_DEC_TEST_VECTORS);
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break;
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#ifdef CONFIG_CRYPTO_HMAC
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case 100:
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138
crypto/tcrypt.h
138
crypto/tcrypt.h
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@ -2211,7 +2211,7 @@ static struct cipher_testvec xtea_enc_tv_template[] = {
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.klen = 16,
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.input = { [0 ... 8] = 0x00 },
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.ilen = 8,
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.result = { 0xaa, 0x22, 0x96, 0xe5, 0x6c, 0x61, 0xf3, 0x45 },
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.result = { 0xd8, 0xd4, 0xe9, 0xde, 0xd9, 0x1e, 0x13, 0xf7 },
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.rlen = 8,
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}, {
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.key = { 0x2b, 0x02, 0x05, 0x68, 0x06, 0x14, 0x49, 0x76,
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@ -2219,31 +2219,31 @@ static struct cipher_testvec xtea_enc_tv_template[] = {
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.klen = 16,
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.input = { 0x74, 0x65, 0x73, 0x74, 0x20, 0x6d, 0x65, 0x2e },
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.ilen = 8,
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.result = { 0x82, 0x3e, 0xeb, 0x35, 0xdc, 0xdd, 0xd9, 0xc3 },
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.result = { 0x94, 0xeb, 0xc8, 0x96, 0x84, 0x6a, 0x49, 0xa8 },
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.rlen = 8,
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}, {
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.key = { 0x09, 0x65, 0x43, 0x11, 0x66, 0x44, 0x39, 0x25,
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0x51, 0x3a, 0x16, 0x10, 0x0a, 0x08, 0x12, 0x6e },
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.klen = 16,
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.input = { 0x6c, 0x6f, 0x6e, 0x67, 0x65, 0x72, 0x5f, 0x74,
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.input = { 0x3e, 0xce, 0xae, 0x22, 0x60, 0x56, 0xa8, 0x9d,
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0x65, 0x73, 0x74, 0x5f, 0x76, 0x65, 0x63, 0x74 },
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.ilen = 16,
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.result = { 0xe2, 0x04, 0xdb, 0xf2, 0x89, 0x85, 0x9e, 0xea,
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.result = { 0xe2, 0x04, 0xdb, 0xf2, 0x89, 0x85, 0x9e, 0xea,
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0x61, 0x35, 0xaa, 0xed, 0xb5, 0xcb, 0x71, 0x2c },
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.rlen = 16,
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}, {
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.key = { 0x4d, 0x76, 0x32, 0x17, 0x05, 0x3f, 0x75, 0x2c,
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0x5d, 0x04, 0x16, 0x36, 0x15, 0x72, 0x63, 0x2f },
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.klen = 16,
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.input = { 0x54, 0x65, 0x61, 0x20, 0x69, 0x73, 0x20, 0x67,
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0x6f, 0x6f, 0x64, 0x20, 0x66, 0x6f, 0x72, 0x20,
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0x79, 0x6f, 0x75, 0x21, 0x21, 0x21, 0x20, 0x72,
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.input = { 0x54, 0x65, 0x61, 0x20, 0x69, 0x73, 0x20, 0x67,
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0x6f, 0x6f, 0x64, 0x20, 0x66, 0x6f, 0x72, 0x20,
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0x79, 0x6f, 0x75, 0x21, 0x21, 0x21, 0x20, 0x72,
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0x65, 0x61, 0x6c, 0x6c, 0x79, 0x21, 0x21, 0x21 },
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.ilen = 32,
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.result = { 0x0b, 0x03, 0xcd, 0x8a, 0xbe, 0x95, 0xfd, 0xb1,
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0xc1, 0x44, 0x91, 0x0b, 0xa5, 0xc9, 0x1b, 0xb4,
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0xa9, 0xda, 0x1e, 0x9e, 0xb1, 0x3e, 0x2a, 0x8f,
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0xea, 0xa5, 0x6a, 0x85, 0xd1, 0xf4, 0xa8, 0xa5 },
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.result = { 0x99, 0x81, 0x9f, 0x5d, 0x6f, 0x4b, 0x31, 0x3a,
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0x86, 0xff, 0x6f, 0xd0, 0xe3, 0x87, 0x70, 0x07,
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0x4d, 0xb8, 0xcf, 0xf3, 0x99, 0x50, 0xb3, 0xd4,
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0x73, 0xa2, 0xfa, 0xc9, 0x16, 0x59, 0x5d, 0x81 },
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.rlen = 32,
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}
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};
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@ -2252,7 +2252,7 @@ static struct cipher_testvec xtea_dec_tv_template[] = {
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{
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.key = { [0 ... 15] = 0x00 },
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.klen = 16,
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.input = { 0xaa, 0x22, 0x96, 0xe5, 0x6c, 0x61, 0xf3, 0x45 },
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.input = { 0xd8, 0xd4, 0xe9, 0xde, 0xd9, 0x1e, 0x13, 0xf7 },
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.ilen = 8,
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.result = { [0 ... 8] = 0x00 },
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.rlen = 8,
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@ -2260,7 +2260,7 @@ static struct cipher_testvec xtea_dec_tv_template[] = {
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.key = { 0x2b, 0x02, 0x05, 0x68, 0x06, 0x14, 0x49, 0x76,
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0x77, 0x5d, 0x0e, 0x26, 0x6c, 0x28, 0x78, 0x43 },
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.klen = 16,
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.input = { 0x82, 0x3e, 0xeb, 0x35, 0xdc, 0xdd, 0xd9, 0xc3 },
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.input = { 0x94, 0xeb, 0xc8, 0x96, 0x84, 0x6a, 0x49, 0xa8 },
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.ilen = 8,
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.result = { 0x74, 0x65, 0x73, 0x74, 0x20, 0x6d, 0x65, 0x2e },
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.rlen = 8,
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@ -2268,24 +2268,24 @@ static struct cipher_testvec xtea_dec_tv_template[] = {
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.key = { 0x09, 0x65, 0x43, 0x11, 0x66, 0x44, 0x39, 0x25,
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0x51, 0x3a, 0x16, 0x10, 0x0a, 0x08, 0x12, 0x6e },
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.klen = 16,
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.input = { 0xe2, 0x04, 0xdb, 0xf2, 0x89, 0x85, 0x9e, 0xea,
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0x61, 0x35, 0xaa, 0xed, 0xb5, 0xcb, 0x71, 0x2c },
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.input = { 0x3e, 0xce, 0xae, 0x22, 0x60, 0x56, 0xa8, 0x9d,
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0x77, 0x4d, 0xd4, 0xb4, 0x87, 0x24, 0xe3, 0x9a },
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.ilen = 16,
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.result = { 0x6c, 0x6f, 0x6e, 0x67, 0x65, 0x72, 0x5f, 0x74,
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.result = { 0x6c, 0x6f, 0x6e, 0x67, 0x65, 0x72, 0x5f, 0x74,
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0x65, 0x73, 0x74, 0x5f, 0x76, 0x65, 0x63, 0x74 },
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.rlen = 16,
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}, {
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.key = { 0x4d, 0x76, 0x32, 0x17, 0x05, 0x3f, 0x75, 0x2c,
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0x5d, 0x04, 0x16, 0x36, 0x15, 0x72, 0x63, 0x2f },
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.klen = 16,
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.input = { 0x0b, 0x03, 0xcd, 0x8a, 0xbe, 0x95, 0xfd, 0xb1,
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0xc1, 0x44, 0x91, 0x0b, 0xa5, 0xc9, 0x1b, 0xb4,
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0xa9, 0xda, 0x1e, 0x9e, 0xb1, 0x3e, 0x2a, 0x8f,
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0xea, 0xa5, 0x6a, 0x85, 0xd1, 0xf4, 0xa8, 0xa5 },
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.input = { 0x99, 0x81, 0x9f, 0x5d, 0x6f, 0x4b, 0x31, 0x3a,
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0x86, 0xff, 0x6f, 0xd0, 0xe3, 0x87, 0x70, 0x07,
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0x4d, 0xb8, 0xcf, 0xf3, 0x99, 0x50, 0xb3, 0xd4,
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0x73, 0xa2, 0xfa, 0xc9, 0x16, 0x59, 0x5d, 0x81 },
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.ilen = 32,
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.result = { 0x54, 0x65, 0x61, 0x20, 0x69, 0x73, 0x20, 0x67,
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0x6f, 0x6f, 0x64, 0x20, 0x66, 0x6f, 0x72, 0x20,
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0x79, 0x6f, 0x75, 0x21, 0x21, 0x21, 0x20, 0x72,
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.result = { 0x54, 0x65, 0x61, 0x20, 0x69, 0x73, 0x20, 0x67,
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0x6f, 0x6f, 0x64, 0x20, 0x66, 0x6f, 0x72, 0x20,
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0x79, 0x6f, 0x75, 0x21, 0x21, 0x21, 0x20, 0x72,
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0x65, 0x61, 0x6c, 0x6c, 0x79, 0x21, 0x21, 0x21 },
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.rlen = 32,
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}
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@ -2594,6 +2594,98 @@ static struct cipher_testvec anubis_cbc_dec_tv_template[] = {
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},
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};
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/*
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* XETA test vectors
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*/
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#define XETA_ENC_TEST_VECTORS 4
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#define XETA_DEC_TEST_VECTORS 4
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static struct cipher_testvec xeta_enc_tv_template[] = {
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{
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.key = { [0 ... 15] = 0x00 },
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.klen = 16,
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.input = { [0 ... 8] = 0x00 },
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.ilen = 8,
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.result = { 0xaa, 0x22, 0x96, 0xe5, 0x6c, 0x61, 0xf3, 0x45 },
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.rlen = 8,
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}, {
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.key = { 0x2b, 0x02, 0x05, 0x68, 0x06, 0x14, 0x49, 0x76,
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0x77, 0x5d, 0x0e, 0x26, 0x6c, 0x28, 0x78, 0x43 },
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.klen = 16,
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.input = { 0x74, 0x65, 0x73, 0x74, 0x20, 0x6d, 0x65, 0x2e },
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.ilen = 8,
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.result = { 0x82, 0x3e, 0xeb, 0x35, 0xdc, 0xdd, 0xd9, 0xc3 },
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.rlen = 8,
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}, {
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.key = { 0x09, 0x65, 0x43, 0x11, 0x66, 0x44, 0x39, 0x25,
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0x51, 0x3a, 0x16, 0x10, 0x0a, 0x08, 0x12, 0x6e },
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.klen = 16,
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.input = { 0x6c, 0x6f, 0x6e, 0x67, 0x65, 0x72, 0x5f, 0x74,
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0x65, 0x73, 0x74, 0x5f, 0x76, 0x65, 0x63, 0x74 },
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.ilen = 16,
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.result = { 0xe2, 0x04, 0xdb, 0xf2, 0x89, 0x85, 0x9e, 0xea,
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0x61, 0x35, 0xaa, 0xed, 0xb5, 0xcb, 0x71, 0x2c },
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.rlen = 16,
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}, {
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.key = { 0x4d, 0x76, 0x32, 0x17, 0x05, 0x3f, 0x75, 0x2c,
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0x5d, 0x04, 0x16, 0x36, 0x15, 0x72, 0x63, 0x2f },
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.klen = 16,
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.input = { 0x54, 0x65, 0x61, 0x20, 0x69, 0x73, 0x20, 0x67,
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0x6f, 0x6f, 0x64, 0x20, 0x66, 0x6f, 0x72, 0x20,
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0x79, 0x6f, 0x75, 0x21, 0x21, 0x21, 0x20, 0x72,
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0x65, 0x61, 0x6c, 0x6c, 0x79, 0x21, 0x21, 0x21 },
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.ilen = 32,
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.result = { 0x0b, 0x03, 0xcd, 0x8a, 0xbe, 0x95, 0xfd, 0xb1,
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0xc1, 0x44, 0x91, 0x0b, 0xa5, 0xc9, 0x1b, 0xb4,
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0xa9, 0xda, 0x1e, 0x9e, 0xb1, 0x3e, 0x2a, 0x8f,
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0xea, 0xa5, 0x6a, 0x85, 0xd1, 0xf4, 0xa8, 0xa5 },
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.rlen = 32,
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}
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};
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static struct cipher_testvec xeta_dec_tv_template[] = {
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{
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.key = { [0 ... 15] = 0x00 },
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.klen = 16,
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.input = { 0xaa, 0x22, 0x96, 0xe5, 0x6c, 0x61, 0xf3, 0x45 },
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.ilen = 8,
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.result = { [0 ... 8] = 0x00 },
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.rlen = 8,
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}, {
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.key = { 0x2b, 0x02, 0x05, 0x68, 0x06, 0x14, 0x49, 0x76,
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0x77, 0x5d, 0x0e, 0x26, 0x6c, 0x28, 0x78, 0x43 },
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.klen = 16,
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.input = { 0x82, 0x3e, 0xeb, 0x35, 0xdc, 0xdd, 0xd9, 0xc3 },
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.ilen = 8,
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.result = { 0x74, 0x65, 0x73, 0x74, 0x20, 0x6d, 0x65, 0x2e },
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.rlen = 8,
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}, {
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.key = { 0x09, 0x65, 0x43, 0x11, 0x66, 0x44, 0x39, 0x25,
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0x51, 0x3a, 0x16, 0x10, 0x0a, 0x08, 0x12, 0x6e },
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.klen = 16,
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.input = { 0xe2, 0x04, 0xdb, 0xf2, 0x89, 0x85, 0x9e, 0xea,
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0x61, 0x35, 0xaa, 0xed, 0xb5, 0xcb, 0x71, 0x2c },
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.ilen = 16,
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.result = { 0x6c, 0x6f, 0x6e, 0x67, 0x65, 0x72, 0x5f, 0x74,
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0x65, 0x73, 0x74, 0x5f, 0x76, 0x65, 0x63, 0x74 },
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.rlen = 16,
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}, {
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.key = { 0x4d, 0x76, 0x32, 0x17, 0x05, 0x3f, 0x75, 0x2c,
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0x5d, 0x04, 0x16, 0x36, 0x15, 0x72, 0x63, 0x2f },
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.klen = 16,
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.input = { 0x0b, 0x03, 0xcd, 0x8a, 0xbe, 0x95, 0xfd, 0xb1,
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0xc1, 0x44, 0x91, 0x0b, 0xa5, 0xc9, 0x1b, 0xb4,
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0xa9, 0xda, 0x1e, 0x9e, 0xb1, 0x3e, 0x2a, 0x8f,
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0xea, 0xa5, 0x6a, 0x85, 0xd1, 0xf4, 0xa8, 0xa5 },
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.ilen = 32,
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.result = { 0x54, 0x65, 0x61, 0x20, 0x69, 0x73, 0x20, 0x67,
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0x6f, 0x6f, 0x64, 0x20, 0x66, 0x6f, 0x72, 0x20,
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0x79, 0x6f, 0x75, 0x21, 0x21, 0x21, 0x20, 0x72,
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0x65, 0x61, 0x6c, 0x6c, 0x79, 0x21, 0x21, 0x21 },
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.rlen = 32,
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}
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};
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/*
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* Compression stuff.
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*/
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81
crypto/tea.c
81
crypto/tea.c
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@ -1,11 +1,15 @@
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/*
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* Cryptographic API.
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*
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* TEA and Xtended TEA Algorithms
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* TEA, XTEA, and XETA crypto alogrithms
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*
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* The TEA and Xtended TEA algorithms were developed by David Wheeler
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* and Roger Needham at the Computer Laboratory of Cambridge University.
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*
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* Due to the order of evaluation in XTEA many people have incorrectly
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* implemented it. XETA (XTEA in the wrong order), exists for
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* compatibility with these implementations.
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*
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* Copyright (c) 2004 Aaron Grothe ajgrothe@yahoo.com
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||||
*
|
||||
* 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);
|
||||
|
|
@ -174,6 +178,51 @@ 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;
|
||||
|
|
@ -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");
|
||||
|
|
|
|||
Loading…
Reference in a new issue