[PATCH 2/9] digest: allow algo to specify their length at runtime
Jean-Christophe PLAGNIOL-VILLARD
plagnioj at jcrosoft.com
Wed Mar 25 04:56:13 PDT 2015
such as RSA as we load a DER key we will detect the key size
at runtime and so the algo length.
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com>
---
crypto/digest.c | 3 +--
include/digest.h | 3 ++-
2 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/crypto/digest.c b/crypto/digest.c
index 047131b..f902dc1 100644
--- a/crypto/digest.c
+++ b/crypto/digest.c
@@ -78,8 +78,7 @@ int digest_generic_digest(struct digest *d, const void *data,
int digest_algo_register(struct digest_algo *d)
{
- if (!d || !d->name || !d->update || !d->final || !d->verify ||
- d->length < 1)
+ if (!d || !d->name || !d->update || !d->final || !d->verify)
return -EINVAL;
if (!d->init)
diff --git a/include/digest.h b/include/digest.h
index 85c4da3..c574b4d 100644
--- a/include/digest.h
+++ b/include/digest.h
@@ -47,6 +47,7 @@ struct digest_algo {
struct digest {
struct digest_algo *algo;
void *ctx;
+ unsigned int length;
};
/*
@@ -99,7 +100,7 @@ static inline int digest_verify(struct digest *d, const unsigned char *md)
static inline int digest_length(struct digest *d)
{
- return d->algo->length;
+ return d->length ? d->length : d->algo->length;
}
static inline int digest_set_key(struct digest *d, const unsigned char *key,
--
2.1.4
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