1 files changed, 23 insertions, 0 deletions
diff --git a/src/libstdcrypto/sha256_feed.c b/src/libstdcrypto/sha256_feed.c
new file mode 100644
index 0000000..5533d75
--- /dev/null
+++ b/src/libstdcrypto/sha256_feed.c
@@ -0,0 +1,23 @@
+/* ISC license. */
+
+#include <skalibs/uint32.h>
+#include <skalibs/bytestr.h>
+#include <skalibs/sha256.h>
+#include "sha256-internal.h"
+
+void sha256_feed (SHA256Schedule_ref ctx, unsigned char inb)
+{
+  register uint32 tmp ;
+  ctx->in[ctx->b>>2] <<= 8 ;
+  ctx->in[ctx->b>>2] |= T8(inb) ;
+  if (++ctx->b >= 64)
+  {
+    register unsigned int i = 0 ;
+    sha256_transform(ctx->buf, ctx->in) ;
+    ctx->b = 0 ;
+    for (; i < 16 ; i++) ctx->in[i] = 0 ;
+  }
+  tmp = ctx->bits[0] ;
+  ctx->bits[0] += 8 ;
+  if (tmp > ctx->bits[0]) ctx->bits[1]++ ;
+}