blake2s

1 files changed, 194 insertions, 2 deletions

diff --git a/src/hash/blake2.c b/src/hash/blake2.c
index 2da4cd0..3dc44e1 100644
--- a/src/hash/blake2.c
+++ b/src/hash/blake2.c
@@ -6,6 +6,7 @@
 #include "../crypto.h"

 //#include "blake2.h"

 #include "../util.h"

+#include "lua5.4/lua.h"

 

 void mix2b(uint64_t* a, uint64_t* b, uint64_t* c, uint64_t* d, int64_t x, int64_t y){

     *a = *a + *b + x;

@@ -85,6 +86,9 @@ void compress2b(uint64_t* hash, uint8_t* inp, uint64_t compressed, int final){
 }

 

 void compress2s(uint32_t* hash, uint8_t* inp, uint32_t compressed, int final){

+    printf("block:\n");

+    for(int i = 0; i != 64; i++) printf("%x ", inp[i]);

+    printf("\n");

     uint32_t v[16], s[16], m[16];

 

     #pragma unroll

@@ -168,7 +172,139 @@ void blake2b(char* inp, int inp_len, char* key, int key_len, int dig_len, char*
     for(int i = 0; i != dig_len; i++)sprintf(buffer, "%s%02x", buffer, (((uint8_t*)hash)[i]));

 }

 

-void blake2s(char* inp, int inp_len, char* key, int key_len, int dig_len, char* buffer){

+struct blake2s_hash {

+    uint8_t *buffer, *key;

+    size_t bufflen, keylen;

+    uint32_t total, *hash;

+    uint64_t compressed, digest_len;

+};

+

+void blake2s_round(struct blake2s_hash* hash, int last){

+  compress2s(hash->hash, hash->buffer, hash->compressed, last);

+} 

+

+#define bs 64

+struct blake2s_hash blake2s_init(char* key, int key_len, int digest_len){

+    struct blake2s_hash a = {.bufflen = key_len, .total = 0, .compressed = 0, .keylen = key_len, .digest_len = digest_len};

+    a.buffer = calloc(sizeof * a.buffer, bs);

+    a.hash = calloc(sizeof * a.hash, 8);

+    a.key = calloc(sizeof* a.key, key_len);

+    memcpy(a.key, key, key_len);

+    memcpy(a.buffer, key, key_len);

+

+    a.hash[0] = sha512_iv.h0 >> 32;

+    a.hash[0] ^= digest_len;

+    a.hash[0] ^= key_len << 8;

+    a.hash[0] ^= 0x01010000;

+    a.hash[1] = sha512_iv.h1 >> 32;

+    a.hash[2] = sha512_iv.h2 >> 32;

+    a.hash[3] = sha512_iv.h3 >> 32;

+    a.hash[4] = sha512_iv.h4 >> 32;

+    a.hash[5] = sha512_iv.h5 >> 32;

+    a.hash[6] = sha512_iv.h6 >> 32;

+    a.hash[7] = sha512_iv.h7 >> 32;

+    if(key_len != 0){

+        a.compressed = 64;

+        blake2s_round(&a, 0);

+        memset(a.buffer, 0, bs);

+        a.bufflen = 0;

+    }

+    return a;

+}

+

+struct blake2s_hash blake2s_init_l(lua_State* L, char* key, int key_len, int digest_len){

+    struct blake2s_hash a = {.bufflen = key_len, .total = 0, .compressed = 0, .keylen = key_len, .digest_len = digest_len};

+    a.buffer = lua_newuserdata(L, sizeof * a.buffer * bs);

+    a.hash = lua_newuserdata(L, sizeof * a.hash * 8);

+    a.key = lua_newuserdata(L, sizeof* a.key * key_len);

+    memcpy(a.key, key, key_len);

+    memset(a.buffer, 0, bs);

+    memcpy(a.buffer, key, key_len);

+    

+    a.hash[0] = sha512_iv.h0 >> 32;

+    a.hash[0] ^= digest_len;

+    a.hash[0] ^= key_len << 8;

+    a.hash[0] ^= 0x01010000;

+    a.hash[1] = sha512_iv.h1 >> 32;

+    a.hash[2] = sha512_iv.h2 >> 32;

+    a.hash[3] = sha512_iv.h3 >> 32;

+    a.hash[4] = sha512_iv.h4 >> 32;

+    a.hash[5] = sha512_iv.h5 >> 32;

+    a.hash[6] = sha512_iv.h6 >> 32;

+    a.hash[7] = sha512_iv.h7 >> 32;

+    if(key_len != 0){

+        a.compressed = 64; //TODO: allow for keys larger than 64 chars

+        blake2s_round(&a, 0);

+        memset(a.buffer, 0, bs);

+        a.bufflen = 0;

+    }

+    return a;

+}

+

+void blake2s_update(uint8_t* input, size_t len, struct blake2s_hash* hash){

+    hash->total += len;

+    size_t total_add = len + hash->bufflen;

+    size_t read = 0;

+    if(total_add < bs){

+        memcpy(hash->buffer + hash->bufflen, input, len);

+        hash->bufflen += len;

+        return;

+    }

+

+    for(; total_add >= bs;){

+        memcpy(hash->buffer + hash->bufflen, input + read, bs - hash->bufflen);

+        total_add -= bs;

+        hash->bufflen = 0;

+        read += bs;

+        hash->compressed += 64;

+        blake2s_round(hash, 0);

+    }

+

+    memset(hash->buffer, 0, bs);

+

+    if(0 != total_add){

+        memcpy(hash->buffer, input + read, total_add);

+        hash->bufflen = total_add;

+    }

+}

+

+void blake2s_final(struct blake2s_hash* hash, char* out_stream){

+  uint8_t old[bs];

+  uint32_t hashh[8];

+  struct blake2s_hash old_hash;

+  memcpy(&old_hash, hash, sizeof * hash);

+  memcpy(old, hash->buffer, bs);

+  memcpy(hashh, hash->hash, 8 * sizeof * hashh);

+

+    hash->compressed += hash->bufflen;

+

+  if(hash->bufflen > 55) {

+    //too large, needs another buffer

+    memset(hash->buffer + hash->bufflen + 1, 0, 64 - hash->bufflen);

+    blake2s_round(hash, 0);

+    hash->compressed = 0;

+    memset(hash->buffer, 0, 64);

+  }

+

+  blake2s_round(hash, 1);

+

+  for(int i = 0; i != hash->digest_len; i++)sprintf(out_stream, "%s%02x", out_stream, (((uint8_t*)hash->hash)[i]));

+    

+  memcpy(hash, &old_hash, sizeof * hash);

+  memcpy(hash->buffer, old, bs);

+  memcpy(hash->hash, hashh, 8 * sizeof * hashh);

+}

+

+void blake2s(uint8_t* inp, int len, char* key, int key_len, int dig_len, char* out){

+    struct blake2s_hash aa = blake2s_init(key, key_len, dig_len);

+    blake2s_update(inp, len, &aa);

+    blake2s_final(&aa, out);

+    free(aa.buffer);

+    free(aa.hash);

+    free(aa.key);

+}

+

+void _blake2s(char* inp, int inp_len, char* key, int key_len, int dig_len, char* buffer){

     uint32_t hash[8];

     

     uint32_t iv0 = hash[0] = sha512_iv.h0 >> 32;

@@ -232,9 +368,65 @@ int l_blake2b(lua_State* L){
     return 1;

 }

 

+int l_blake2s_clone(lua_State* L){

+

+  struct blake2s_hash* a = (struct blake2s_hash*)lua_touserdata(L, -1);

+

+  lua_pushinteger(L, a->digest_len);

+  lua_pushlstring(L, (char*)a->key, a->keylen);

+  l_blake2s_init(L);

+

+  struct blake2s_hash* b = (struct blake2s_hash*)lua_touserdata(L, -1);

+

+  memcpy(b->hash, a->hash, 8 * sizeof * b->hash);

+  memcpy(b->buffer, a->buffer, bs * sizeof * b->buffer);

+  

+  b->keylen = a->keylen;

+  b->digest_len = a->digest_len;

+  b->keylen = a->keylen;

+  b->total = a->total;

+  b->bufflen = a->bufflen;

+  b->compressed = a->compressed;

+  b->total = a->total;

+  return 1;

+}

+

+lua_common_hash_meta(blake2s);

+

+int l_blake2s_init(lua_State* L){

+  char* key = NULL;

+  size_t keylen = 0, outlen = 32;

+

+  if(lua_gettop(L) > 1){

+     key = (char*)luaL_checklstring(L, -1, &keylen);

+     outlen = luaL_checkinteger(L, -2);

+  } else if(lua_gettop(L) > 0) outlen = luaL_checkinteger(L, -1);

+

+  struct blake2s_hash* a = (struct blake2s_hash*)lua_newuserdata(L, sizeof * a);

+  int ud = lua_gettop(L);

+  *a = blake2s_init_l(L, key, keylen, outlen);

+  lua_common_hash_meta_def(blake2s);

+  lua_pushvalue(L, ud);

+  return 1;

+}

+

+lua_common_hash_update(blake2s, blake2s);

+

+int l_blake2s_final(lua_State* L){

+  struct blake2s_hash* a = (struct blake2s_hash*)lua_touserdata(L, -1);

+

+  char digest[a->digest_len * 8];

+  memset(digest, 0, a->digest_len * 8);

+  blake2s_final(a, digest);

+

+  lua_pushstring(L, digest);

+  return 1;

+}

+

 int l_blake2s(lua_State* L){

+    if(lua_gettop(L) == 0 || lua_type(L, 1) == LUA_TNUMBER) return l_blake2s_init(L);

     size_t len = 0;

-    char* a = (char*)luaL_checklstring(L, 1, &len);

+    uint8_t* a = (uint8_t*)luaL_checklstring(L, 1, &len);

     int argv = lua_gettop(L); 

 

     uint32_t out_len = 32;