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 <asm/kmap_types.h> 21 22 extern enum km_type crypto_km_types[]; 23 24 static inline enum km_type crypto_kmap_type(int out) 25 { 26 return crypto_km_types[(in_softirq() ? 2 : 0) + out]; 27 } 28 29 static inline void *crypto_kmap(struct page *page, int out) 30 { 31 return kmap_atomic(page, crypto_kmap_type(out)); 32 } 33 34 static inline void crypto_kunmap(void *vaddr, int out) 35 { 36 kunmap_atomic(vaddr, crypto_kmap_type(out)); 37 } 38 39 static inline void crypto_yield(struct crypto_tfm *tfm) 40 { 41 if (!in_atomic()) 42 cond_resched(); 43 } 44 45 #ifdef CONFIG_CRYPTO_HMAC 46 int crypto_alloc_hmac_block(struct crypto_tfm *tfm); 47 void crypto_free_hmac_block(struct crypto_tfm *tfm); 48 #else 49 static inline int crypto_alloc_hmac_block(struct crypto_tfm *tfm) 50 { 51 return 0; 52 } 53 54 static inline void crypto_free_hmac_block(struct crypto_tfm *tfm) 55 { } 56 #endif 57 58 #ifdef CONFIG_PROC_FS 59 void __init crypto_init_proc(void); 60 #else 61 static inline void crypto_init_proc(void) 62 { } 63 #endif 64 65 static inline unsigned int crypto_digest_ctxsize(struct crypto_alg *alg, 66 int flags) 67 { 68 return alg->cra_ctxsize; 69 } 70 71 static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg, 72 int flags) 73 { 74 unsigned int len = alg->cra_ctxsize; 75 76 switch (flags & CRYPTO_TFM_MODE_MASK) { 77 case CRYPTO_TFM_MODE_CBC: 78 len = ALIGN(len, alg->cra_alignmask + 1); 79 len += alg->cra_blocksize; 80 break; 81 } 82 83 return len; 84 } 85 86 static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg, 87 int flags) 88 { 89 return alg->cra_ctxsize; 90 } 91 92 int crypto_init_digest_flags(struct crypto_tfm *tfm, u32 flags); 93 int crypto_init_cipher_flags(struct crypto_tfm *tfm, u32 flags); 94 int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags); 95 96 int crypto_init_digest_ops(struct crypto_tfm *tfm); 97 int crypto_init_cipher_ops(struct crypto_tfm *tfm); 98 int crypto_init_compress_ops(struct crypto_tfm *tfm); 99 100 void crypto_exit_digest_ops(struct crypto_tfm *tfm); 101 void crypto_exit_cipher_ops(struct crypto_tfm *tfm); 102 void crypto_exit_compress_ops(struct crypto_tfm *tfm); 103 104 #endif /* _CRYPTO_INTERNAL_H */ 105 106