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crypto: caam - incapsulate dropping leading zeros into function

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This function will be used into further patches.

Signed-off-by: Radu Alexe <radu.alexe@nxp.com>
Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Radu Alexe 2017-04-25 16:26:37 +03:00 committed by Herbert Xu
parent 7fcaf62a9f
commit 7ca4a9a10f
1 changed files with 9 additions and 4 deletions
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13
drivers/crypto/caam/caampkc.c
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@ -357,6 +357,14 @@ static void caam_rsa_free_key(struct caam_rsa_key *key)
key->n_sz = 0; key->n_sz = 0;
} }
static void caam_rsa_drop_leading_zeros(const u8 **ptr, size_t *nbytes)
{
while (!**ptr && *nbytes) {
(*ptr)++;
(*nbytes)--;
}
}
/** /**
* caam_read_raw_data - Read a raw byte stream as a positive integer. * caam_read_raw_data - Read a raw byte stream as a positive integer.
* The function skips buffer's leading zeros, copies the remained data * The function skips buffer's leading zeros, copies the remained data
@ -370,10 +378,7 @@ static inline u8 *caam_read_raw_data(const u8 *buf, size_t *nbytes)
{ {
u8 *val; u8 *val;
while (!*buf && *nbytes) { caam_rsa_drop_leading_zeros(&buf, nbytes);
buf++;
(*nbytes)--;
}
if (!*nbytes) if (!*nbytes)
return NULL; return NULL;