Add support for extended hash + add support for output hash to custom buffer when supported

Signed-off-by: Mattias Andrée <maandree@kth.se>

1 files changed, 5 insertions, 2 deletions

diff --git a/libhashsum_init_sha1_hasher.c b/libhashsum_init_sha1_hasher.c
index 91bcc15..13020e2 100644
--- a/libhashsum_init_sha1_hasher.c
+++ b/libhashsum_init_sha1_hasher.c
@@ -38,9 +38,11 @@ finalise_const(struct libhashsum_hasher *this, const void *data, size_t bytes, u
 	m = &m[r];
 	bytes -= r;
 
-	libsha1_digest(&this->state.sha1.s, m, (bytes << 3) | (size_t)extra_bits, this->state.sha1.sum);
+	if (!this->hash_output)
+		this->hash_output = this->state.sha1.sum;
+
+	libsha1_digest(&this->state.sha1.s, m, (bytes << 3) | (size_t)extra_bits, this->hash_output);
 	memset(&this->state.sha1.s, 0, sizeof(this->state.sha1.s));
-	this->hash_output = this->state.sha1.sum;
 	return 0;
 }
 
@@ -66,6 +68,7 @@ libhashsum_init_sha1_hasher(struct libhashsum_hasher *this)
 	this->process = &process;
 	this->finalise_const = &finalise_const;
 	this->finalise = &finalise;
+	this->stretch = NULL;
 	this->destroy = NULL;
 	libsha1_init(&this->state.sha1.s, LIBSHA1_1);
 	return 0;