des_generic.c (cf9ce948f47640797bd19980e1d99c6d17d0bdc3) des_generic.c (6574e6c64e971c9adb629e81e497afdb52b1c9df)
1/*
2 * Cryptographic API.
3 *
4 * DES & Triple DES EDE Cipher Algorithms.
5 *
6 * Copyright (c) 2005 Dag Arne Osvik <da@osvik.no>
7 *
8 * This program is free software; you can redistribute it and/or modify

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854 * multiple keys.
855 *
856 * However, if the first two or last two independent 64-bit keys are
857 * equal (k1 == k2 or k2 == k3), then the DES3 operation is simply the
858 * same as DES. Implementers MUST reject keys that exhibit this
859 * property.
860 *
861 */
1/*
2 * Cryptographic API.
3 *
4 * DES & Triple DES EDE Cipher Algorithms.
5 *
6 * Copyright (c) 2005 Dag Arne Osvik <da@osvik.no>
7 *
8 * This program is free software; you can redistribute it and/or modify

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854 * multiple keys.
855 *
856 * However, if the first two or last two independent 64-bit keys are
857 * equal (k1 == k2 or k2 == k3), then the DES3 operation is simply the
858 * same as DES. Implementers MUST reject keys that exhibit this
859 * property.
860 *
861 */
862static int des3_ede_setkey(struct crypto_tfm *tfm, const u8 *key,
863 unsigned int keylen)
862int __des3_ede_setkey(u32 *expkey, u32 *flags, const u8 *key,
863 unsigned int keylen)
864{
865 const u32 *K = (const u32 *)key;
864{
865 const u32 *K = (const u32 *)key;
866 struct des3_ede_ctx *dctx = crypto_tfm_ctx(tfm);
867 u32 *expkey = dctx->expkey;
868 u32 *flags = &tfm->crt_flags;
869
870 if (unlikely(!((K[0] ^ K[2]) | (K[1] ^ K[3])) ||
871 !((K[2] ^ K[4]) | (K[3] ^ K[5]))) &&
872 (*flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
873 *flags |= CRYPTO_TFM_RES_WEAK_KEY;
874 return -EINVAL;
875 }
876
877 des_ekey(expkey, key); expkey += DES_EXPKEY_WORDS; key += DES_KEY_SIZE;
878 dkey(expkey, key); expkey += DES_EXPKEY_WORDS; key += DES_KEY_SIZE;
879 des_ekey(expkey, key);
880
881 return 0;
882}
866
867 if (unlikely(!((K[0] ^ K[2]) | (K[1] ^ K[3])) ||
868 !((K[2] ^ K[4]) | (K[3] ^ K[5]))) &&
869 (*flags & CRYPTO_TFM_REQ_WEAK_KEY)) {
870 *flags |= CRYPTO_TFM_RES_WEAK_KEY;
871 return -EINVAL;
872 }
873
874 des_ekey(expkey, key); expkey += DES_EXPKEY_WORDS; key += DES_KEY_SIZE;
875 dkey(expkey, key); expkey += DES_EXPKEY_WORDS; key += DES_KEY_SIZE;
876 des_ekey(expkey, key);
877
878 return 0;
879}
880EXPORT_SYMBOL_GPL(__des3_ede_setkey);
883
881
882static int des3_ede_setkey(struct crypto_tfm *tfm, const u8 *key,
883 unsigned int keylen)
884{
885 struct des3_ede_ctx *dctx = crypto_tfm_ctx(tfm);
886 u32 *flags = &tfm->crt_flags;
887 u32 *expkey = dctx->expkey;
888
889 return __des3_ede_setkey(expkey, flags, key, keylen);
890}
891
884static void des3_ede_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
885{
886 struct des3_ede_ctx *dctx = crypto_tfm_ctx(tfm);
887 const u32 *K = dctx->expkey;
888 const __le32 *s = (const __le32 *)src;
889 __le32 *d = (__le32 *)dst;
890 u32 L, R, A, B;
891 int i;

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940 FP(R, L, A);
941
942 d[0] = cpu_to_le32(R);
943 d[1] = cpu_to_le32(L);
944}
945
946static struct crypto_alg des_algs[2] = { {
947 .cra_name = "des",
892static void des3_ede_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
893{
894 struct des3_ede_ctx *dctx = crypto_tfm_ctx(tfm);
895 const u32 *K = dctx->expkey;
896 const __le32 *s = (const __le32 *)src;
897 __le32 *d = (__le32 *)dst;
898 u32 L, R, A, B;
899 int i;

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948 FP(R, L, A);
949
950 d[0] = cpu_to_le32(R);
951 d[1] = cpu_to_le32(L);
952}
953
954static struct crypto_alg des_algs[2] = { {
955 .cra_name = "des",
956 .cra_driver_name = "des-generic",
957 .cra_priority = 100,
948 .cra_flags = CRYPTO_ALG_TYPE_CIPHER,
949 .cra_blocksize = DES_BLOCK_SIZE,
950 .cra_ctxsize = sizeof(struct des_ctx),
951 .cra_module = THIS_MODULE,
952 .cra_alignmask = 3,
953 .cra_u = { .cipher = {
954 .cia_min_keysize = DES_KEY_SIZE,
955 .cia_max_keysize = DES_KEY_SIZE,
956 .cia_setkey = des_setkey,
957 .cia_encrypt = des_encrypt,
958 .cia_decrypt = des_decrypt } }
959}, {
960 .cra_name = "des3_ede",
958 .cra_flags = CRYPTO_ALG_TYPE_CIPHER,
959 .cra_blocksize = DES_BLOCK_SIZE,
960 .cra_ctxsize = sizeof(struct des_ctx),
961 .cra_module = THIS_MODULE,
962 .cra_alignmask = 3,
963 .cra_u = { .cipher = {
964 .cia_min_keysize = DES_KEY_SIZE,
965 .cia_max_keysize = DES_KEY_SIZE,
966 .cia_setkey = des_setkey,
967 .cia_encrypt = des_encrypt,
968 .cia_decrypt = des_decrypt } }
969}, {
970 .cra_name = "des3_ede",
971 .cra_driver_name = "des3_ede-generic",
972 .cra_priority = 100,
961 .cra_flags = CRYPTO_ALG_TYPE_CIPHER,
962 .cra_blocksize = DES3_EDE_BLOCK_SIZE,
963 .cra_ctxsize = sizeof(struct des3_ede_ctx),
964 .cra_module = THIS_MODULE,
965 .cra_alignmask = 3,
966 .cra_u = { .cipher = {
967 .cia_min_keysize = DES3_EDE_KEY_SIZE,
968 .cia_max_keysize = DES3_EDE_KEY_SIZE,

--- 24 unchanged lines hidden --- 		973 .cra_flags = CRYPTO_ALG_TYPE_CIPHER,
974 .cra_blocksize = DES3_EDE_BLOCK_SIZE,
975 .cra_ctxsize = sizeof(struct des3_ede_ctx),
976 .cra_module = THIS_MODULE,
977 .cra_alignmask = 3,
978 .cra_u = { .cipher = {
979 .cia_min_keysize = DES3_EDE_KEY_SIZE,
980 .cia_max_keysize = DES3_EDE_KEY_SIZE,

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