Get rid of strlen

Author: bifurcation

lib/hpke/src/hybrid_kem.cpp

@@ -215,10 +215,10 @@ HybridKEM::c2pri_combiner(const bytes& ss_pq,
                           const bytes& ss_t,
                           const bytes& ct_t,
                           const bytes& ek_t,
-                          const char* label) const
+                          const std::string& label) const
 {
   static const auto kdf = Digest::get<Digest::ID::SHA3_256>();
-  const auto label_bytes = std::vector<uint8_t>(label, label + strlen(label));
+  const auto label_bytes = from_ascii(label);
   return kdf.hash(ss_pq + ss_t + ct_t + ek_t + label_bytes);
 }
 

lib/hpke/src/hybrid_kem.h

@@ -6,6 +6,8 @@
 #include "group.h"
 #include "mlkem.h"
 
+#include <string>
+
 namespace MLS_NAMESPACE::hpke {
 
 struct HybridKEM : public KEM
@@ -63,7 +65,7 @@ struct HybridKEM : public KEM
                        const bytes& ss_t,
                        const bytes& ct_t,
                        const bytes& ek_t,
-                       const char* label) const;
+                       const std::string& label) const;
 
   HybridKEM(KEM::ID kem_id_in, const MLKEM& mlkem_in, const Group& group_in);
   friend HybridKEM make_hybrid_kem(KEM::ID kem_id_in,