1 /* 2 * Cryptographic API. 3 * 4 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License as published by the Free 8 * Software Foundation; either version 2 of the License, or (at your option) 9 * any later version. 10 * 11 */ 12 #ifndef _CRYPTO_INTERNAL_H 13 #define _CRYPTO_INTERNAL_H 14 #include <linux/crypto.h> 15 #include <linux/mm.h> 16 #include <linux/highmem.h> 17 #include <linux/interrupt.h> 18 #include <linux/init.h> 19 #include <linux/kernel.h> 20 #include <linux/slab.h> 21 #include <asm/kmap_types.h> 22 23 extern enum km_type crypto_km_types[]; 24 25 static inline enum km_type crypto_kmap_type(int out) 26 { 27 return crypto_km_types[(in_softirq() ? 2 : 0) + out]; 28 } 29 30 static inline void *crypto_kmap(struct page *page, int out) 31 { 32 return kmap_atomic(page, crypto_kmap_type(out)); 33 } 34 35 static inline void crypto_kunmap(void *vaddr, int out) 36 { 37 kunmap_atomic(vaddr, crypto_kmap_type(out)); 38 } 39 40 static inline void crypto_yield(struct crypto_tfm *tfm) 41 { 42 if (tfm->crt_flags & CRYPTO_TFM_REQ_MAY_SLEEP) 43 cond_resched(); 44 } 45 46 #ifdef CONFIG_CRYPTO_HMAC 47 int crypto_alloc_hmac_block(struct crypto_tfm *tfm); 48 void crypto_free_hmac_block(struct crypto_tfm *tfm); 49 #else 50 static inline int crypto_alloc_hmac_block(struct crypto_tfm *tfm) 51 { 52 return 0; 53 } 54 55 static inline void crypto_free_hmac_block(struct crypto_tfm *tfm) 56 { } 57 #endif 58 59 #ifdef CONFIG_PROC_FS 60 void __init crypto_init_proc(void); 61 #else 62 static inline void crypto_init_proc(void) 63 { } 64 #endif 65 66 static inline unsigned int crypto_digest_ctxsize(struct crypto_alg *alg, 67 int flags) 68 { 69 return alg->cra_ctxsize; 70 } 71 72 static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg, 73 int flags) 74 { 75 unsigned int len = alg->cra_ctxsize; 76 77 switch (flags & CRYPTO_TFM_MODE_MASK) { 78 case CRYPTO_TFM_MODE_CBC: 79 len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1); 80 len += alg->cra_blocksize; 81 break; 82 } 83 84 return len; 85 } 86 87 static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg, 88 int flags) 89 { 90 return alg->cra_ctxsize; 91 } 92 93 int crypto_init_digest_flags(struct crypto_tfm *tfm, u32 flags); 94 int crypto_init_cipher_flags(struct crypto_tfm *tfm, u32 flags); 95 int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags); 96 97 int crypto_init_digest_ops(struct crypto_tfm *tfm); 98 int crypto_init_cipher_ops(struct crypto_tfm *tfm); 99 int crypto_init_compress_ops(struct crypto_tfm *tfm); 100 101 void crypto_exit_digest_ops(struct crypto_tfm *tfm); 102 void crypto_exit_cipher_ops(struct crypto_tfm *tfm); 103 void crypto_exit_compress_ops(struct crypto_tfm *tfm); 104 105 #endif /* _CRYPTO_INTERNAL_H */ 106 107