crypto: DRBG - externalize DRBG functions for LRNG
This patch allows several DRBG functions to be called by the LRNG kernel code paths outside the drbg.c file. CC: Torsten Duwe <duwe@lst.de> CC: "Eric W. Biederman" <ebiederm@xmission.com> CC: "Alexander E. Patrakov" <patrakov@gmail.com> CC: "Ahmed S. Darwish" <darwish.07@gmail.com> CC: "Theodore Y. Ts'o" <tytso@mit.edu> CC: Willy Tarreau <w@1wt.eu> CC: Matthew Garrett <mjg59@srcf.ucam.org> CC: Vito Caputo <vcaputo@pengaru.com> CC: Andreas Dilger <adilger.kernel@dilger.ca> CC: Jan Kara <jack@suse.cz> CC: Ray Strode <rstrode@redhat.com> CC: William Jon McCann <mccann@jhu.edu> CC: zhangjs <zachary@baishancloud.com> CC: Andy Lutomirski <luto@kernel.org> CC: Florian Weimer <fweimer@redhat.com> CC: Lennart Poettering <mzxreary@0pointer.de> CC: Nicolai Stange <nstange@suse.de> Reviewed-by: Alexander Lobakin <alobakin@pm.me> Tested-by: Alexander Lobakin <alobakin@pm.me> Reviewed-by: Roman Drahtmueller <draht@schaltsekun.de> Tested-by: Roman Drahtmüller <draht@schaltsekun.de> Tested-by: Marcelo Henrique Cerri <marcelo.cerri@canonical.com> Tested-by: Neil Horman <nhorman@redhat.com> Signed-off-by: Stephan Mueller <smueller@chronox.de> Signed-off-by: UtsavBalar1231 <utsavbalar1231@gmail.com>
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@ -113,7 +113,7 @@
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* the SHA256 / AES 256 over other ciphers. Thus, the favored
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* DRBGs are the latest entries in this array.
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*/
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static const struct drbg_core drbg_cores[] = {
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const struct drbg_core drbg_cores[] = {
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#ifdef CONFIG_CRYPTO_DRBG_CTR
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{
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.flags = DRBG_CTR | DRBG_STRENGTH128,
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@ -190,6 +190,7 @@ static const struct drbg_core drbg_cores[] = {
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},
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#endif /* CONFIG_CRYPTO_DRBG_HMAC */
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};
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EXPORT_SYMBOL(drbg_cores);
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static int drbg_uninstantiate(struct drbg_state *drbg);
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@ -205,7 +206,7 @@ static int drbg_uninstantiate(struct drbg_state *drbg);
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* Return: normalized strength in *bytes* value or 32 as default
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* to counter programming errors
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*/
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static inline unsigned short drbg_sec_strength(drbg_flag_t flags)
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unsigned short drbg_sec_strength(drbg_flag_t flags)
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{
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switch (flags & DRBG_STRENGTH_MASK) {
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case DRBG_STRENGTH128:
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@ -218,6 +219,7 @@ static inline unsigned short drbg_sec_strength(drbg_flag_t flags)
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return 32;
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}
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}
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EXPORT_SYMBOL(drbg_sec_strength);
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/*
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* FIPS 140-2 continuous self test for the noise source
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@ -1225,7 +1227,7 @@ out:
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}
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/* Free all substructures in a DRBG state without the DRBG state structure */
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static inline void drbg_dealloc_state(struct drbg_state *drbg)
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void drbg_dealloc_state(struct drbg_state *drbg)
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{
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if (!drbg)
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return;
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@ -1246,12 +1248,13 @@ static inline void drbg_dealloc_state(struct drbg_state *drbg)
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drbg->fips_primed = false;
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}
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}
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EXPORT_SYMBOL(drbg_dealloc_state);
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/*
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* Allocate all sub-structures for a DRBG state.
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* The DRBG state structure must already be allocated.
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*/
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static inline int drbg_alloc_state(struct drbg_state *drbg)
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int drbg_alloc_state(struct drbg_state *drbg)
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{
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int ret = -ENOMEM;
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unsigned int sb_size = 0;
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@ -1330,6 +1333,7 @@ err:
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drbg_dealloc_state(drbg);
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return ret;
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}
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EXPORT_SYMBOL(drbg_alloc_state);
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/*************************************************************************
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* DRBG interface functions
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@ -1865,8 +1869,7 @@ out:
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*
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* return: flags
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*/
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static inline void drbg_convert_tfm_core(const char *cra_driver_name,
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int *coreref, bool *pr)
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void drbg_convert_tfm_core(const char *cra_driver_name, int *coreref, bool *pr)
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{
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int i = 0;
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size_t start = 0;
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@ -1893,6 +1896,7 @@ static inline void drbg_convert_tfm_core(const char *cra_driver_name,
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}
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}
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}
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EXPORT_SYMBOL(drbg_convert_tfm_core);
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static int drbg_kcapi_init(struct crypto_tfm *tfm)
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{
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@ -282,4 +282,11 @@ enum drbg_prefixes {
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DRBG_PREFIX3
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};
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extern int drbg_alloc_state(struct drbg_state *drbg);
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extern void drbg_dealloc_state(struct drbg_state *drbg);
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extern void drbg_convert_tfm_core(const char *cra_driver_name, int *coreref,
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bool *pr);
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extern const struct drbg_core drbg_cores[];
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extern unsigned short drbg_sec_strength(drbg_flag_t flags);
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#endif /* _DRBG_H */
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