#ifndef _CRYPTO_LRW_H #define _CRYPTO_LRW_H #include struct scatterlist; struct gf128mul_64k; struct blkcipher_desc; #define LRW_BLOCK_SIZE 16 struct lrw_table_ctx { /* optimizes multiplying a random (non incrementing, as at the * start of a new sector) value with key2, we could also have * used 4k optimization tables or no optimization at all. In the * latter case we would have to store key2 here */ struct gf128mul_64k *table; /* stores: * key2*{ 0,0,...0,0,0,0,1 }, key2*{ 0,0,...0,0,0,1,1 }, * key2*{ 0,0,...0,0,1,1,1 }, key2*{ 0,0,...0,1,1,1,1 } * key2*{ 0,0,...1,1,1,1,1 }, etc * needed for optimized multiplication of incrementing values * with key2 */ be128 mulinc[128]; }; int lrw_init_table(struct lrw_table_ctx *ctx, const u8 *tweak); void lrw_free_table(struct lrw_table_ctx *ctx); struct lrw_crypt_req { be128 *tbuf; unsigned int tbuflen; struct lrw_table_ctx *table_ctx; void *crypt_ctx; void (*crypt_fn)(void *ctx, u8 *blks, unsigned int nbytes); }; int lrw_crypt(struct blkcipher_desc *desc, struct scatterlist *dst, struct scatterlist *src, unsigned int nbytes, struct lrw_crypt_req *req); #endif /* _CRYPTO_LRW_H */ -back net-next plumbingsTobias Klauser

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