1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 216d004a2SEvgeniy Polyakov /* 316d004a2SEvgeniy Polyakov * DES & Triple DES EDE Cipher Algorithms. 416d004a2SEvgeniy Polyakov */ 516d004a2SEvgeniy Polyakov 616d004a2SEvgeniy Polyakov #ifndef __CRYPTO_DES_H 716d004a2SEvgeniy Polyakov #define __CRYPTO_DES_H 816d004a2SEvgeniy Polyakov 9*04007b0eSArd Biesheuvel #include <linux/types.h> 10d7198ce4SHerbert Xu 1116d004a2SEvgeniy Polyakov #define DES_KEY_SIZE 8 1216d004a2SEvgeniy Polyakov #define DES_EXPKEY_WORDS 32 1316d004a2SEvgeniy Polyakov #define DES_BLOCK_SIZE 8 1416d004a2SEvgeniy Polyakov 1516d004a2SEvgeniy Polyakov #define DES3_EDE_KEY_SIZE (3 * DES_KEY_SIZE) 1616d004a2SEvgeniy Polyakov #define DES3_EDE_EXPKEY_WORDS (3 * DES_EXPKEY_WORDS) 1716d004a2SEvgeniy Polyakov #define DES3_EDE_BLOCK_SIZE DES_BLOCK_SIZE 1816d004a2SEvgeniy Polyakov 19*04007b0eSArd Biesheuvel struct des_ctx { 20*04007b0eSArd Biesheuvel u32 expkey[DES_EXPKEY_WORDS]; 21*04007b0eSArd Biesheuvel }; 22*04007b0eSArd Biesheuvel 23*04007b0eSArd Biesheuvel struct des3_ede_ctx { 24*04007b0eSArd Biesheuvel u32 expkey[DES3_EDE_EXPKEY_WORDS]; 25*04007b0eSArd Biesheuvel }; 26*04007b0eSArd Biesheuvel 27*04007b0eSArd Biesheuvel void des_encrypt(const struct des_ctx *ctx, u8 *dst, const u8 *src); 28*04007b0eSArd Biesheuvel void des_decrypt(const struct des_ctx *ctx, u8 *dst, const u8 *src); 29*04007b0eSArd Biesheuvel 30*04007b0eSArd Biesheuvel void des3_ede_encrypt(const struct des3_ede_ctx *dctx, u8 *dst, const u8 *src); 31*04007b0eSArd Biesheuvel void des3_ede_decrypt(const struct des3_ede_ctx *dctx, u8 *dst, const u8 *src); 32*04007b0eSArd Biesheuvel 33*04007b0eSArd Biesheuvel /** 34*04007b0eSArd Biesheuvel * des_expand_key - Expand a DES input key into a key schedule 35*04007b0eSArd Biesheuvel * @ctx: the key schedule 36*04007b0eSArd Biesheuvel * @key: buffer containing the input key 37*04007b0eSArd Biesheuvel * @len: size of the buffer contents 38*04007b0eSArd Biesheuvel * 39*04007b0eSArd Biesheuvel * Returns 0 on success, -EINVAL if the input key is rejected and -ENOKEY if 40*04007b0eSArd Biesheuvel * the key is accepted but has been found to be weak. 41*04007b0eSArd Biesheuvel */ 42*04007b0eSArd Biesheuvel int des_expand_key(struct des_ctx *ctx, const u8 *key, unsigned int keylen); 43*04007b0eSArd Biesheuvel 44*04007b0eSArd Biesheuvel /** 45*04007b0eSArd Biesheuvel * des3_ede_expand_key - Expand a triple DES input key into a key schedule 46*04007b0eSArd Biesheuvel * @ctx: the key schedule 47*04007b0eSArd Biesheuvel * @key: buffer containing the input key 48*04007b0eSArd Biesheuvel * @len: size of the buffer contents 49*04007b0eSArd Biesheuvel * 50*04007b0eSArd Biesheuvel * Returns 0 on success, -EINVAL if the input key is rejected and -ENOKEY if 51*04007b0eSArd Biesheuvel * the key is accepted but has been found to be weak. Note that weak keys will 52*04007b0eSArd Biesheuvel * be rejected (and -EINVAL will be returned) when running in FIPS mode. 53*04007b0eSArd Biesheuvel */ 54*04007b0eSArd Biesheuvel int des3_ede_expand_key(struct des3_ede_ctx *ctx, const u8 *key, 55*04007b0eSArd Biesheuvel unsigned int keylen); 56*04007b0eSArd Biesheuvel 5716d004a2SEvgeniy Polyakov #endif /* __CRYPTO_DES_H */ 58