after 2 weeks of porting over the ngc_ft1 code to solanaceae and rewriting the highlevel logic

(29 commits predate this)

solanaceae/ngc_ft1_sha1/hash_utils.cpp

@@ -0,0 +1,26 @@
+#include "./hash_utils.hpp"
+
+#include <sha1.h>
+
+// returns the 20bytes sha1 hash
+std::vector<uint8_t> hash_sha1(const uint8_t* data, size_t size) {
+	SHA1_CTX ctx;
+	SHA1Init(&ctx);
+
+	{ // lib only takes uint32_t sizes, so chunk it
+		constexpr size_t hash_block_size {0xffffffff};
+		size_t i = 0;
+		for (; i + hash_block_size < size; i += hash_block_size) {
+			SHA1Update(&ctx, reinterpret_cast<const uint8_t*>(data) + i, hash_block_size);
+		}
+
+		if (i < size) {
+			SHA1Update(&ctx, reinterpret_cast<const uint8_t*>(data) + i, size - i);
+		}
+	}
+
+	std::vector<uint8_t> sha1_hash(20);
+	SHA1Final(sha1_hash.data(), &ctx);
+	return sha1_hash;
+}
+