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-rw-r--r--ext/openssl/ossl_digest.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/ext/openssl/ossl_digest.c b/ext/openssl/ossl_digest.c
index ab165c4a84d..8fd6b75c360 100644
--- a/ext/openssl/ossl_digest.c
+++ b/ext/openssl/ossl_digest.c
@@ -403,6 +403,17 @@ Init_ossl_digest()
* sha256 << data2
* sha256 << data3
* digest = sha256.digest
+ *
+ * === Reuse a Digest instance
+ *
+ * data1 = File.read('file1')
+ * sha256 = OpenSSL::Digest::SHA256.new
+ * digest1 = sha256.digest(data1)
+ *
+ * data2 = File.read('file2')
+ * sha256.reset
+ * digest2 = sha256.digest(data2)
+ *
*/
cDigest = rb_define_class_under(mOSSL, "Digest", rb_path2class("Digest::Class"));
/* Document-class: OpenSSL::Digest::DigestError