From 618cb30e307321ecda4cca4e5472d406c93ba384 Mon Sep 17 00:00:00 2001
From: Christian Mehlis <mehlis@inf.fu-berlin.de>
Date: Mon, 12 Aug 2013 18:26:17 +0200
Subject: [PATCH] add the default wrapper for sha256
---
sys/crypto/sha256.c | 16 ++++++++++++++++
sys/include/sha256.h | 12 ++++++++++++
2 files changed, 28 insertions(+)
diff --git a/sys/crypto/sha256.c b/sys/crypto/sha256.c
index ce4d615d89..46b29b4b9c 100644
--- a/sys/crypto/sha256.c
+++ b/sys/crypto/sha256.c
@@ -228,3 +228,19 @@ void SHA256_Final(unsigned char digest[32], SHA256_CTX *ctx)
/* Clear the context state */
memset((void *) ctx, 0, sizeof(*ctx));
}
+
+unsigned char *SHA256(const unsigned char *d, size_t n, unsigned char *md)
+{
+ SHA256_CTX c;
+ static unsigned char m[SHA256_DIGEST_LENGTH];
+
+ if (md == NULL) {
+ md = m;
+ }
+
+ SHA256_Init(&c);
+ SHA256_Update(&c, d, n);
+ SHA256_Final(md, &c);
+
+ return md;
+}
diff --git a/sys/include/sha256.h b/sys/include/sha256.h
index c5a1a6e061..288bb2d7e6 100644
--- a/sys/include/sha256.h
+++ b/sys/include/sha256.h
@@ -65,4 +65,16 @@ void SHA256_Update(SHA256_CTX *ctx, const void *in, size_t len);
*/
void SHA256_Final(unsigned char digest[32], SHA256_CTX *ctx);
+/**
+ * @brief A wrapper function to simplify the generation of a hash, this is
+ * usefull for generating sha256 for one buffer
+ *
+ * @param d pointer to the buffer to generate hash from
+ * @param n length of the buffer
+ * @param md optional pointer to an array for the result, length must be
+ * SHA256_DIGEST_LENGTH
+ * if md == NULL, one static buffer is used
+ */
+unsigned char *SHA256(const unsigned char *d, size_t n,unsigned char *md);
+
#endif /* !_SHA256_H_ */
--
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