diff --git a/include/haggis.h b/include/haggis.h
index 4b1f602..761da60 100644
--- a/include/haggis.h
+++ b/include/haggis.h
@@ -116,7 +116,7 @@ typedef struct {
 } haggis_node;
 
 void haggis_node_deinit(haggis_node *node);
-haggis_node* haggis_create_node(char *file, haggis_hardlink_list *list);
+haggis_node* haggis_create_node(char *file, haggis_algorithm a, haggis_hardlink_list *list);
 int haggis_extract_node(FILE *stram, haggis_node *node);
 int haggis_load_node(FILE *stream, haggis_node *node);
 int haggis_store_node(FILE *stream, haggis_node *node);
diff --git a/src/haggis.c b/src/haggis.c
index e5aed3d..f504135 100644
--- a/src/haggis.c
+++ b/src/haggis.c
@@ -31,6 +31,7 @@
  */
 
 #include <limits.h>          // PATH_MAX
+#include <stddef.h>
 #include <stdint.h>          // uint<x>_t
 
 #if defined(__FreeBSD__) || defined(__DragonFly__)
@@ -72,7 +73,7 @@ int haggis_check_header(FILE *stream) {
         return 1;
     if (memcmp(buf, header, 7))
         return 2;
-    return 1;
+    return 0;
 }
 
 void haggis_device_init(dev_t rdev, haggis_device *dev) {
@@ -158,6 +159,15 @@ int haggis_load_cksum(FILE *stream, haggis_checksum *cksum) {
     return 0;
 }
 
+void init_md5(haggis_file *f) {
+    MD5_CTX ctx;
+
+    f->cksum.tag = md5;
+    MD5Init(&ctx);
+    MD5Update(&ctx, f->data, (size_t)f->len.val);
+    MD5Final(f->cksum.sum.md5, &ctx);
+}
+
 int validate_md5(haggis_file *file) {
     MD5_CTX ctx;
     u8 digest[16];
@@ -171,6 +181,15 @@ int validate_md5(haggis_file *file) {
 }
 
 #if defined(__FreeBSD__) || defined(__DragonFly__)
+void init_sha1(haggis_file *f) {
+    SHA1_CTX ctx;
+
+    f->cksum.tag = sha1;
+    SHA1_Init(&ctx);
+    SHA1_Update(&ctx, f->data, (size_t)f->len.val);
+    SHA1_Final(f->cksum.sum.sha1, &ctx);
+}
+
 int validate_sha1(haggis_file *file) {
     SHA1_CTX ctx;
     u8 digest[20];
@@ -183,6 +202,15 @@ int validate_sha1(haggis_file *file) {
     return 0;
 }
 #elif defined(__linux__) || defined(__NetBSD__) || defined(__OpenBSD__)
+void init_sha1(haggis_file *f) {
+    SHA1_CTX ctx;
+
+    f->cksum.tag = sha1;
+    SHA1_Init(&ctx);
+    SHA1_Update(&ctx, f->data, (size_t)f->len.val);
+    SHA1_Final(f->cksum.sum.sha1, &ctx);
+}
+
 int validate_sha1(haggis_file *file) {
     SHA1_CTX ctx;
     u8 digest[20];
@@ -197,6 +225,15 @@ int validate_sha1(haggis_file *file) {
 #endif /* if defined (__FreeBSD__) */
 
 #if defined(__FreeBSD__) || defined(__DragonFly) || defined(__NetBSD__)
+void init_sha256(haggis_file *f) {
+    SHA256_CTX ctx;
+
+    f->cksum.tag = sha256;
+    SHA256_Init(&ctx);
+    SHA256_Update(&ctx, f->data, (size_t)f->len.val);
+    SHA256_Final(f->cksum.sum.sha256, &ctx);
+}
+
 int validate_sha256(haggis_file *file) {
     SHA256_CTX ctx;
     u8 digest[32];
@@ -209,6 +246,15 @@ int validate_sha256(haggis_file *file) {
     return 0;
 }
 #elif defined(__linux__) || defined(__OpenBSD__)
+void init_sha256(haggis_file *f) {
+    SHA2_CTX ctx;
+
+    f->cksum.tag = sha256;
+    SHA256_Init(&ctx);
+    SHA256_Update(&ctx, f->data, (size_t)f->len.val);
+    SHA256_Final(f->cksum.sum.sha256, &ctx);
+}
+
 int validate_sha256(haggis_file *file) {
     SHA2_CTX ctx;
     u8 digest[32];
@@ -222,6 +268,22 @@ int validate_sha256(haggis_file *file) {
 }
 #endif /* if defined (__FreeBSD__) */
 
+void haggis_init_cksum(haggis_file *f, haggis_algorithm a) {
+    switch (a) {
+    case md5:
+        init_md5(f);
+        break;
+    case sha1:
+        init_sha1(f);
+        break;
+    case sha256:
+        init_sha256(f);
+        break;
+    case skip:
+        break;
+    }
+}
+
 int haggis_validate_cksum(haggis_file *file) {
     switch (file->cksum.tag) {
     case md5:
@@ -236,7 +298,7 @@ int haggis_validate_cksum(haggis_file *file) {
     return 0;
 }
 
-int haggis_file_init(char *path, haggis_file *hf) {
+int haggis_file_init(char *path, haggis_file *hf, haggis_algorithm a) {
     FILE *f;
     long len;
 
@@ -260,6 +322,7 @@ int haggis_file_init(char *path, haggis_file *hf) {
         return 1;
     }
     fclose(f);
+    haggis_init_cksum(hf, a);
     return 0;
 }
 
@@ -455,7 +518,7 @@ void haggis_node_deinit(haggis_node *node) {
     free(node);
 }
 
-haggis_node* haggis_create_node(char *file, haggis_hardlink_list *list) {
+haggis_node* haggis_create_node(char *file, haggis_algorithm a, haggis_hardlink_list *list) {
     struct stat *st = NULL;
     u16 mode;
     char *target;
@@ -500,7 +563,7 @@ haggis_node* haggis_create_node(char *file, haggis_hardlink_list *list) {
                     return node;
                 }
             }
-            res = haggis_file_init(file, &node->filetype.f_type.file);
+            res = haggis_file_init(file, &node->filetype.f_type.file, a);
             if (res != 0) {
                 haggis_node_deinit(node);
                 return NULL;
diff --git a/test/Makefile b/test/Makefile
index 3ea394d..58a4f98 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -34,6 +34,8 @@ CFLAGS     += -I../include
 LIBS       += ../libhaggis.a
 LIBS       += -lmd
 
+tests      += store_header
+tests      += check_header
 tests      += store_device
 tests      += load_device
 tests      += store_md5
@@ -42,13 +44,15 @@ tests      += store_sha1
 tests      += load_sha1
 tests      += store_sha256
 tests      += load_sha256
+tests      += init_file_md5
+tests      += init_file_sha1
 total      != echo $(tests) | wc -w | awk '{ print $$1 }'
 
 .PHONY: test
 test: $(tests)
-	@printf "\n\tRunning %i tests\n\n" $(total)
+	@echo -e "\n\t\e[0;33mRunning $(total) tests\e[0m\n"
 	@idx=1 ; success=0 ; fail=0; for t in $(tests) ; \
-		do printf "[%i/$(total)] \%-25s" $${idx} $${t} ; \
+		do printf "[%02i/$(total)] \%-25s" $${idx} $${t} ; \
 		idx=$$(expr $${idx} + 1) ; \
 		./$${t} ; \
 		if [ $$? -eq 0 ] ; \
diff --git a/test/check_header.c b/test/check_header.c
new file mode 100644
index 0000000..53af19e
--- /dev/null
+++ b/test/check_header.c
@@ -0,0 +1,13 @@
+#include "haggis_private.h"
+#include <stdio.h>
+
+int main() {
+    FILE *f;
+    int ret;
+
+    f = fopen("output/header", "r");
+    ret = haggis_check_header(f);
+    fclose(f);
+    return ret;
+}
+
diff --git a/test/haggis_private.h b/test/haggis_private.h
index f6aa430..03aff19 100644
--- a/test/haggis_private.h
+++ b/test/haggis_private.h
@@ -50,7 +50,7 @@ int validate_md5(haggis_file *file);
 int validate_sha1(haggis_file *file);
 int validate_sha256(haggis_file *file);
 int haggis_validate_cksum(haggis_file *file);
-int haggis_file_init(char *path, haggis_file *hf);
+int haggis_file_init(char *path, haggis_file *hf, haggis_algorithm a);
 int haggis_store_file(FILE *stream, haggis_file *file);
 int haggis_load_file(FILE *stream, haggis_file *f);
 void haggis_filename_init(char *target, haggis_filename *fname);
diff --git a/test/init_file b/test/init_file
new file mode 100755
index 0000000..2139d4b
Binary files /dev/null and b/test/init_file differ
diff --git a/test/init_file_md5.c b/test/init_file_md5.c
new file mode 100644
index 0000000..2f7b273
--- /dev/null
+++ b/test/init_file_md5.c
@@ -0,0 +1,14 @@
+#include "haggis_private.h"
+#include <assert.h>
+#include <stdio.h>
+#include <string.h>
+
+int main() {
+    haggis_file hf;
+    char *f = "check_header.c";
+    const u8 buf[16] = { 127, 161, 170, 134, 33, 218, 100, 29, 250, 255, 15, 125, 109, 5, 216, 9 };
+
+    assert(haggis_file_init(f, &hf, md5) == 0);
+    assert(hf.cksum.tag == md5);
+    assert(memcmp(buf, hf.cksum.sum.md5, 16) == 0);
+}
diff --git a/test/init_file_sha1.c b/test/init_file_sha1.c
new file mode 100644
index 0000000..fca9667
--- /dev/null
+++ b/test/init_file_sha1.c
@@ -0,0 +1,15 @@
+#include "haggis_private.h"
+#include <assert.h>
+#include <stdio.h>
+#include <string.h>
+
+int main() {
+    haggis_file hf;
+    char *f = "check_header.c";
+    const u8 buf[20] = { 175, 45, 7, 226, 140, 184, 187, 69, 59, 208, 246, 108, 187, 249, 63, 111, 56, 65, 1, 58 };
+
+    assert(haggis_file_init(f, &hf, sha1) == 0);
+    assert(hf.cksum.tag == sha1);
+    assert(memcmp(buf, hf.cksum.sum.sha1, 20) == 0);
+}
+
diff --git a/test/store_header.c b/test/store_header.c
new file mode 100644
index 0000000..580a8c1
--- /dev/null
+++ b/test/store_header.c
@@ -0,0 +1,13 @@
+#include "haggis_private.h"
+#include <stdio.h>
+
+int main() {
+    FILE *f;
+    int ret;
+
+    f = fopen("output/header", "w");
+    ret = haggis_store_header(f);
+    fclose(f);
+    return ret;
+}
+