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lib/mpi: export mpi_rshift

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A subsequent patch will make the crypto/dh's dh_is_pubkey_valid() to
calculate a safe-prime groups Q parameter from P: Q = (P - 1) / 2. For
implementing this, mpi_rshift() will be needed. Export it so that it's
accessible from crypto/dh.

Signed-off-by: Nicolai Stange <nstange@suse.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Nicolai Stange 2022-02-21 13:11:00 +01:00 • committed by Herbert Xu
parent 32f07cc40c
commit 81771ff241
1 changed files with 1 additions and 0 deletions
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lib/mpi/mpi-bit.c
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@ -242,6 +242,7 @@ void mpi_rshift(MPI x, MPI a, unsigned int n)
} }
MPN_NORMALIZE(x->d, x->nlimbs); MPN_NORMALIZE(x->d, x->nlimbs);
} }
EXPORT_SYMBOL_GPL(mpi_rshift);
/**************** /****************
* Shift A by COUNT limbs to the left * Shift A by COUNT limbs to the left