sha1: Add new module

SHA1 hasher. Needed by websocket support that is coming soon.

Using either libmd or openssl to do the actual hashing.

1 files changed, 16 insertions, 0 deletions

diff --git a/src/sha1.cc b/src/sha1.cc
new file mode 100644
index 0000000..5d20ca9
--- /dev/null
+++ b/src/sha1.cc
@@ -0,0 +1,16 @@
+#include "sha1.hh"
+
+namespace sha1 {
+
+std::array<uint8_t, 20> hash(std::span<char const> input) {
+  // std::string and std::string_view -> std::span includes null terminating
+  // byte.
+  if (!input.empty() && input.back() == '\0') {
+    return hash(std::span{reinterpret_cast<uint8_t const*>(input.data()),
+                          input.size() - 1});
+  }
+  return hash(
+      std::span{reinterpret_cast<uint8_t const*>(input.data()), input.size()});
+}
+
+}  // namespace sha1