11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * Cryptographic API. 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> 55cb1454bSHerbert Xu * Copyright (c) 2005 Herbert Xu <herbert@gondor.apana.org.au> 61da177e4SLinus Torvalds * 71da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or modify it 81da177e4SLinus Torvalds * under the terms of the GNU General Public License as published by the Free 91da177e4SLinus Torvalds * Software Foundation; either version 2 of the License, or (at your option) 101da177e4SLinus Torvalds * any later version. 111da177e4SLinus Torvalds * 121da177e4SLinus Torvalds */ 131da177e4SLinus Torvalds #ifndef _CRYPTO_INTERNAL_H 141da177e4SLinus Torvalds #define _CRYPTO_INTERNAL_H 15cce9e06dSHerbert Xu 16cce9e06dSHerbert Xu #include <crypto/algapi.h> 172825982dSHerbert Xu #include <linux/completion.h> 181da177e4SLinus Torvalds #include <linux/mm.h> 191da177e4SLinus Torvalds #include <linux/highmem.h> 201da177e4SLinus Torvalds #include <linux/interrupt.h> 211da177e4SLinus Torvalds #include <linux/init.h> 225cb1454bSHerbert Xu #include <linux/list.h> 234cc7720cSHerbert Xu #include <linux/module.h> 24fbdae9f3SHerbert Xu #include <linux/kernel.h> 252825982dSHerbert Xu #include <linux/notifier.h> 265cb1454bSHerbert Xu #include <linux/rwsem.h> 2764baf3cfSHerbert Xu #include <linux/slab.h> 281da177e4SLinus Torvalds #include <asm/kmap_types.h> 291da177e4SLinus Torvalds 302825982dSHerbert Xu /* Crypto notification events. */ 312825982dSHerbert Xu enum { 322825982dSHerbert Xu CRYPTO_MSG_ALG_REQUEST, 332825982dSHerbert Xu CRYPTO_MSG_ALG_REGISTER, 342825982dSHerbert Xu CRYPTO_MSG_ALG_UNREGISTER, 352825982dSHerbert Xu CRYPTO_MSG_TMPL_REGISTER, 362825982dSHerbert Xu CRYPTO_MSG_TMPL_UNREGISTER, 372825982dSHerbert Xu }; 382825982dSHerbert Xu 394cc7720cSHerbert Xu struct crypto_instance; 404cc7720cSHerbert Xu struct crypto_template; 414cc7720cSHerbert Xu 422825982dSHerbert Xu struct crypto_larval { 432825982dSHerbert Xu struct crypto_alg alg; 442825982dSHerbert Xu struct crypto_alg *adult; 452825982dSHerbert Xu struct completion completion; 46492e2b63SHerbert Xu u32 mask; 472825982dSHerbert Xu }; 482825982dSHerbert Xu 495cb1454bSHerbert Xu extern struct list_head crypto_alg_list; 505cb1454bSHerbert Xu extern struct rw_semaphore crypto_alg_sem; 512825982dSHerbert Xu extern struct blocking_notifier_head crypto_chain; 525cb1454bSHerbert Xu 531da177e4SLinus Torvalds extern enum km_type crypto_km_types[]; 541da177e4SLinus Torvalds 551da177e4SLinus Torvalds static inline enum km_type crypto_kmap_type(int out) 561da177e4SLinus Torvalds { 571da177e4SLinus Torvalds return crypto_km_types[(in_softirq() ? 2 : 0) + out]; 581da177e4SLinus Torvalds } 591da177e4SLinus Torvalds 601da177e4SLinus Torvalds static inline void *crypto_kmap(struct page *page, int out) 611da177e4SLinus Torvalds { 621da177e4SLinus Torvalds return kmap_atomic(page, crypto_kmap_type(out)); 631da177e4SLinus Torvalds } 641da177e4SLinus Torvalds 651da177e4SLinus Torvalds static inline void crypto_kunmap(void *vaddr, int out) 661da177e4SLinus Torvalds { 671da177e4SLinus Torvalds kunmap_atomic(vaddr, crypto_kmap_type(out)); 681da177e4SLinus Torvalds } 691da177e4SLinus Torvalds 701da177e4SLinus Torvalds static inline void crypto_yield(struct crypto_tfm *tfm) 711da177e4SLinus Torvalds { 7264baf3cfSHerbert Xu if (tfm->crt_flags & CRYPTO_TFM_REQ_MAY_SLEEP) 731da177e4SLinus Torvalds cond_resched(); 741da177e4SLinus Torvalds } 751da177e4SLinus Torvalds 761da177e4SLinus Torvalds #ifdef CONFIG_CRYPTO_HMAC 771da177e4SLinus Torvalds int crypto_alloc_hmac_block(struct crypto_tfm *tfm); 781da177e4SLinus Torvalds void crypto_free_hmac_block(struct crypto_tfm *tfm); 791da177e4SLinus Torvalds #else 801da177e4SLinus Torvalds static inline int crypto_alloc_hmac_block(struct crypto_tfm *tfm) 811da177e4SLinus Torvalds { 821da177e4SLinus Torvalds return 0; 831da177e4SLinus Torvalds } 841da177e4SLinus Torvalds 851da177e4SLinus Torvalds static inline void crypto_free_hmac_block(struct crypto_tfm *tfm) 861da177e4SLinus Torvalds { } 871da177e4SLinus Torvalds #endif 881da177e4SLinus Torvalds 891da177e4SLinus Torvalds #ifdef CONFIG_PROC_FS 901da177e4SLinus Torvalds void __init crypto_init_proc(void); 91cce9e06dSHerbert Xu void __exit crypto_exit_proc(void); 921da177e4SLinus Torvalds #else 931da177e4SLinus Torvalds static inline void crypto_init_proc(void) 941da177e4SLinus Torvalds { } 95cce9e06dSHerbert Xu static inline void crypto_exit_proc(void) 96cce9e06dSHerbert Xu { } 971da177e4SLinus Torvalds #endif 981da177e4SLinus Torvalds 99fbdae9f3SHerbert Xu static inline unsigned int crypto_digest_ctxsize(struct crypto_alg *alg, 100fbdae9f3SHerbert Xu int flags) 101fbdae9f3SHerbert Xu { 102ee756416SHerbert Xu unsigned int len = alg->cra_ctxsize; 103ee756416SHerbert Xu 104ee756416SHerbert Xu if (alg->cra_alignmask) { 105ee756416SHerbert Xu len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1); 106ee756416SHerbert Xu len += alg->cra_digest.dia_digestsize; 107ee756416SHerbert Xu } 108ee756416SHerbert Xu 109ee756416SHerbert Xu return len; 110fbdae9f3SHerbert Xu } 111fbdae9f3SHerbert Xu 112fbdae9f3SHerbert Xu static inline unsigned int crypto_cipher_ctxsize(struct crypto_alg *alg, 113fbdae9f3SHerbert Xu int flags) 114fbdae9f3SHerbert Xu { 115fbdae9f3SHerbert Xu unsigned int len = alg->cra_ctxsize; 116fbdae9f3SHerbert Xu 117fbdae9f3SHerbert Xu switch (flags & CRYPTO_TFM_MODE_MASK) { 118fbdae9f3SHerbert Xu case CRYPTO_TFM_MODE_CBC: 1199d853c37SHerbert Xu len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1); 120fbdae9f3SHerbert Xu len += alg->cra_blocksize; 121fbdae9f3SHerbert Xu break; 122fbdae9f3SHerbert Xu } 123fbdae9f3SHerbert Xu 124fbdae9f3SHerbert Xu return len; 125fbdae9f3SHerbert Xu } 126fbdae9f3SHerbert Xu 127fbdae9f3SHerbert Xu static inline unsigned int crypto_compress_ctxsize(struct crypto_alg *alg, 128fbdae9f3SHerbert Xu int flags) 129fbdae9f3SHerbert Xu { 130fbdae9f3SHerbert Xu return alg->cra_ctxsize; 131fbdae9f3SHerbert Xu } 132fbdae9f3SHerbert Xu 1332825982dSHerbert Xu struct crypto_alg *crypto_mod_get(struct crypto_alg *alg); 1342825982dSHerbert Xu void crypto_mod_put(struct crypto_alg *alg); 135492e2b63SHerbert Xu struct crypto_alg *__crypto_alg_lookup(const char *name, u32 type, u32 mask); 136492e2b63SHerbert Xu struct crypto_alg *crypto_alg_mod_lookup(const char *name, u32 type, u32 mask); 1372825982dSHerbert Xu 1381da177e4SLinus Torvalds int crypto_init_digest_flags(struct crypto_tfm *tfm, u32 flags); 1391da177e4SLinus Torvalds int crypto_init_cipher_flags(struct crypto_tfm *tfm, u32 flags); 1401da177e4SLinus Torvalds int crypto_init_compress_flags(struct crypto_tfm *tfm, u32 flags); 1411da177e4SLinus Torvalds 1421da177e4SLinus Torvalds int crypto_init_digest_ops(struct crypto_tfm *tfm); 1431da177e4SLinus Torvalds int crypto_init_cipher_ops(struct crypto_tfm *tfm); 1441da177e4SLinus Torvalds int crypto_init_compress_ops(struct crypto_tfm *tfm); 1451da177e4SLinus Torvalds 1461da177e4SLinus Torvalds void crypto_exit_digest_ops(struct crypto_tfm *tfm); 1471da177e4SLinus Torvalds void crypto_exit_cipher_ops(struct crypto_tfm *tfm); 1481da177e4SLinus Torvalds void crypto_exit_compress_ops(struct crypto_tfm *tfm); 1491da177e4SLinus Torvalds 150492e2b63SHerbert Xu void crypto_larval_error(const char *name, u32 type, u32 mask); 1512825982dSHerbert Xu 1526bfd4809SHerbert Xu void crypto_shoot_alg(struct crypto_alg *alg); 1536bfd4809SHerbert Xu struct crypto_tfm *__crypto_alloc_tfm(struct crypto_alg *alg, u32 flags); 1546bfd4809SHerbert Xu 1554cc7720cSHerbert Xu int crypto_register_instance(struct crypto_template *tmpl, 1564cc7720cSHerbert Xu struct crypto_instance *inst); 1574cc7720cSHerbert Xu 1582825982dSHerbert Xu int crypto_register_notifier(struct notifier_block *nb); 1592825982dSHerbert Xu int crypto_unregister_notifier(struct notifier_block *nb); 1602825982dSHerbert Xu 1616bfd4809SHerbert Xu static inline void crypto_alg_put(struct crypto_alg *alg) 1626bfd4809SHerbert Xu { 1636bfd4809SHerbert Xu if (atomic_dec_and_test(&alg->cra_refcnt) && alg->cra_destroy) 1646bfd4809SHerbert Xu alg->cra_destroy(alg); 1656bfd4809SHerbert Xu } 1666bfd4809SHerbert Xu 1674cc7720cSHerbert Xu static inline int crypto_tmpl_get(struct crypto_template *tmpl) 1684cc7720cSHerbert Xu { 1694cc7720cSHerbert Xu return try_module_get(tmpl->module); 1704cc7720cSHerbert Xu } 1714cc7720cSHerbert Xu 1724cc7720cSHerbert Xu static inline void crypto_tmpl_put(struct crypto_template *tmpl) 1734cc7720cSHerbert Xu { 1744cc7720cSHerbert Xu module_put(tmpl->module); 1754cc7720cSHerbert Xu } 1764cc7720cSHerbert Xu 1772825982dSHerbert Xu static inline int crypto_is_larval(struct crypto_alg *alg) 1782825982dSHerbert Xu { 1792825982dSHerbert Xu return alg->cra_flags & CRYPTO_ALG_LARVAL; 1802825982dSHerbert Xu } 1812825982dSHerbert Xu 1826bfd4809SHerbert Xu static inline int crypto_is_dead(struct crypto_alg *alg) 1836bfd4809SHerbert Xu { 1846bfd4809SHerbert Xu return alg->cra_flags & CRYPTO_ALG_DEAD; 1856bfd4809SHerbert Xu } 1866bfd4809SHerbert Xu 1876bfd4809SHerbert Xu static inline int crypto_is_moribund(struct crypto_alg *alg) 1886bfd4809SHerbert Xu { 1896bfd4809SHerbert Xu return alg->cra_flags & (CRYPTO_ALG_DEAD | CRYPTO_ALG_DYING); 1906bfd4809SHerbert Xu } 1916bfd4809SHerbert Xu 1922825982dSHerbert Xu static inline int crypto_notify(unsigned long val, void *v) 1932825982dSHerbert Xu { 1942825982dSHerbert Xu return blocking_notifier_call_chain(&crypto_chain, val, v); 1952825982dSHerbert Xu } 1962825982dSHerbert Xu 1971da177e4SLinus Torvalds #endif /* _CRYPTO_INTERNAL_H */ 1981da177e4SLinus Torvalds 199