1 files changed, 37 insertions, 0 deletions
diff --git a/src/libstdcrypto/md5_update.c b/src/libstdcrypto/md5_update.c
new file mode 100644
index 0000000..63fdea3
--- /dev/null
+++ b/src/libstdcrypto/md5_update.c
@@ -0,0 +1,37 @@
+/* ISC license. */
+
+#include <skalibs/uint32.h>
+#include <skalibs/bytestr.h>
+#include <skalibs/md5.h>
+#include "md5-internal.h"
+
+void md5_update (MD5Schedule_ref ctx, char const *s, unsigned int len)
+{
+  register uint32 t = ctx->bits[0] ;
+  if ((ctx->bits[0] = t + (len << 3)) < t)
+    ctx->bits[1]++ ;
+  ctx->bits[1] += len >> 29 ;
+  t = (t >> 3) & 0x3f ;
+  if (t)
+  {
+    unsigned char *p = ctx->in + t ;
+    t = 64 - t ;
+    if (len < t)
+    {
+      byte_copy((char *)p, len, s) ;
+      return ;
+    }
+    byte_copy((char *)p, t, s) ;
+    uint32_little_endian((char *)ctx->in, 16) ;
+    md5_transform(ctx->buf, (uint32 *)ctx->in) ;
+    s += t ; len -= t ;
+  }
+  while (len >= 64)
+  {
+    byte_copy((char *)ctx->in, 64, s) ;
+    uint32_little_endian((char *)ctx->in, 16) ;
+    md5_transform(ctx->buf, (uint32 *)ctx->in) ;
+    s += 64 ; len -= 64 ;
+  }
+  byte_copy((char *)ctx->in, len, s) ;
+}