sha256: add sha256_direct()/SHA256_DIRECT() helpers

2 files changed, 11 insertions, 0 deletions

diff --git a/src/fundamental/sha256.c b/src/fundamental/sha256.c
index 7ead5f169c..43ee996b6f 100644
--- a/src/fundamental/sha256.c
+++ b/src/fundamental/sha256.c
@@ -289,3 +289,10 @@ static void sha256_process_block(const void *buffer, size_t len, struct sha256_c
         ctx->H[6] = g;
         ctx->H[7] = h;
 }
+
+uint8_t* sha256_direct(const void *buffer, size_t sz, uint8_t result[static SHA256_DIGEST_SIZE]) {
+        struct sha256_ctx ctx;
+        sha256_init_ctx(&ctx);
+        sha256_process_bytes(buffer, sz, &ctx);
+        return sha256_finish_ctx(&ctx, result);
+}
diff --git a/src/fundamental/sha256.h b/src/fundamental/sha256.h
index 337e746c49..31790c2ebd 100644
--- a/src/fundamental/sha256.h
+++ b/src/fundamental/sha256.h
@@ -27,3 +27,7 @@ struct sha256_ctx {
 void sha256_init_ctx(struct sha256_ctx *ctx);
 uint8_t *sha256_finish_ctx(struct sha256_ctx *ctx, uint8_t resbuf[static SHA256_DIGEST_SIZE]);
 void sha256_process_bytes(const void *buffer, size_t len, struct sha256_ctx *ctx);
+
+uint8_t* sha256_direct(const void *buffer, size_t sz, uint8_t result[static SHA256_DIGEST_SIZE]);
+
+#define SHA256_DIRECT(buffer, sz) sha256_direct(buffer, sz, (uint8_t[SHA256_DIGEST_SIZE]) {})