forked from Minki/linux
crypto: caam - incapsulate dropping leading zeros into function
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>
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@ -357,6 +357,14 @@ static void caam_rsa_free_key(struct caam_rsa_key *key)
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key->n_sz = 0;
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}
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static void caam_rsa_drop_leading_zeros(const u8 **ptr, size_t *nbytes)
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{
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while (!**ptr && *nbytes) {
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(*ptr)++;
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(*nbytes)--;
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}
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}
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/**
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* caam_read_raw_data - Read a raw byte stream as a positive integer.
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* The function skips buffer's leading zeros, copies the remained data
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@ -370,10 +378,7 @@ static inline u8 *caam_read_raw_data(const u8 *buf, size_t *nbytes)
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{
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u8 *val;
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while (!*buf && *nbytes) {
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buf++;
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(*nbytes)--;
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}
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caam_rsa_drop_leading_zeros(&buf, nbytes);
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if (!*nbytes)
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return NULL;
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