firmware-utils: honor env SOURCE_DATE_EPOCH

Use the timestamp from the enviroment SOURCE_DATE_EPOCH
if set instead of the build time.
Fixes reproducible builds for certain firmware images.

Signed-off-by: Alexander Couzens <lynxis@fe80.eu>

diff --git a/src/addpattern.c b/src/addpattern.c
index 2ecc7ffd756131d9d2856c06a4a54cabaec8b9c0..9bc48653356291c1568e020a6f5bcdc35822fb09 100644 (file)
--- a/src/addpattern.c
+++ b/src/addpattern.c
@@ -58,6 +58,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <errno.h>
 #include <time.h>
 #include <unistd.h>
 #include <sys/stat.h>
@@ -141,6 +142,20 @@ void usage(void)
        exit(EXIT_FAILURE);
 }
 
+static time_t source_date_epoch = -1;
+static void set_source_date_epoch() {
+       char *env = getenv("SOURCE_DATE_EPOCH");
+       char *endptr = env;
+       errno = 0;
+        if (env && *env) {
+               source_date_epoch = strtoull(env, &endptr, 10);
+               if (errno || (endptr && *endptr != '\0')) {
+                       fprintf(stderr, "Invalid SOURCE_DATE_EPOCH");
+                       exit(1);
+               }
+        }
+}
+
 struct board_info *find_board(char *id)
 {
        struct board_info *board;
@@ -273,7 +288,10 @@ int main(int argc, char **argv)
                usage();
        }
 
-       if (time(&t) == (time_t)(-1)) {
+       set_source_date_epoch();
+       if (source_date_epoch != -1) {
+               t = source_date_epoch;
+       } else if ((time(&t) == (time_t)(-1))) {
                fprintf(stderr, "time call failed\n");
                return EXIT_FAILURE;
        }

diff --git a/src/hcsmakeimage.c b/src/hcsmakeimage.c
index 603ea882b11b9e83b79fd8123b8fe1991ffc7db5..7baa7b5845e1ab9f67aa8f3b86446dce2a98326c 100644 (file)
--- a/src/hcsmakeimage.c
+++ b/src/hcsmakeimage.c
@@ -5,7 +5,8 @@
 #include <string.h>
 #include <getopt.h>
 #include <unistd.h>
-#include <sys/time.h>
+#include <errno.h>
+#include <time.h>
 #include <sys/stat.h>
 #include <libgen.h>
 #include "bcmalgo.h"
@@ -42,6 +43,19 @@ static void print_help ( const char* ename )
        printf ( "\n" );
 }
 
+static time_t source_date_epoch = -1;
+static void set_source_date_epoch() {
+       char *env = getenv("SOURCE_DATE_EPOCH");
+       char *endptr = env;
+       errno = 0;
+        if (env && *env) {
+               source_date_epoch = strtoull(env, &endptr, 10);
+               if (errno || (endptr && *endptr != '\0')) {
+                       fprintf(stderr, "Invalid SOURCE_DATE_EPOCH");
+                       exit(1);
+               }
+        }
+}
 
 int main ( int argc, char** argv )
 {
@@ -149,11 +163,19 @@ int main ( int argc, char** argv )
        {
                fname = filename;
        }
-       struct timeval tm;
-       gettimeofday ( &tm,NULL );
+
+       time_t t = -1;
+       set_source_date_epoch();
+       if (source_date_epoch != -1) {
+               t = source_date_epoch;
+       } else if ((time(&t) == (time_t)(-1))) {
+               fprintf(stderr, "time call failed\n");
+               return EXIT_FAILURE;
+       }
+
        struct stat buf;
        stat ( input,&buf );
-       ldr_header_t* head = construct_header ( magicnum, (uint16_t) majrev, (uint16_t) minrev, ( uint32_t ) tm.tv_sec, ( uint32_t ) buf.st_size, ldaddress, fname, get_file_crc ( input ) );
+       ldr_header_t* head = construct_header ( magicnum, (uint16_t) majrev, (uint16_t) minrev, ( uint32_t ) t, ( uint32_t ) buf.st_size, ldaddress, fname, get_file_crc ( input ) );
        free(dupe);
        //uint32_t magic, uint16_t rev_maj,uint16_t rev_min, uint32_t build_date, uint32_t filelen, uint32_t ldaddress, const char* filename, uint32_t crc
        //FILE* fd = fopen ("/tftpboot/haxorware11rev32.bin","r");

diff --git a/src/imagetag.c b/src/imagetag.c
index 90fb7a4c7392a0ecdc59afb79a703b0dcc11505f..bc70399ccaa390be3ecedaed98e67e66d49a4e0f 100644 (file)
--- a/src/imagetag.c
+++ b/src/imagetag.c
@@ -11,7 +11,6 @@
 #include <stdlib.h>
 #include <string.h>
 #include <stdint.h>
-#include <time.h>
 #include <unistd.h>
 #include <sys/stat.h>
 #include <netinet/in.h>

diff --git a/src/jcgimage.c b/src/jcgimage.c
index 7755eab1ed32ff9eca1f8dffb05429a35eed9e94..354c26be19b2a242b9bb5509acfdd008c52f73ed 100644 (file)
--- a/src/jcgimage.c
+++ b/src/jcgimage.c
@@ -158,6 +158,20 @@ opensize(char *name, size_t *size)
        return fd;
 }
 
+static time_t source_date_epoch = -1;
+static void set_source_date_epoch() {
+       char *env = getenv("SOURCE_DATE_EPOCH");
+       char *endptr = env;
+       errno = 0;
+        if (env && *env) {
+               source_date_epoch = strtoull(env, &endptr, 10);
+               if (errno || (endptr && *endptr != '\0')) {
+                       fprintf(stderr, "Invalid SOURCE_DATE_EPOCH");
+                       exit(1);
+               }
+        }
+}
+
 /*
  * Write the JCG header
  */
@@ -167,6 +181,13 @@ mkjcgheader(struct jcg_header *h, size_t psize, char *version)
        uLong crc;
        uint16_t major = 0, minor = 0;
        void *payload = (void *)h + sizeof(*h);
+       time_t t;
+
+       if (source_date_epoch != -1) {
+               t = source_date_epoch;
+       } else if ((time(&t) == (time_t)(-1))) {
+               err(1, "time call failed");
+       }
 
        if (version != NULL) {
                if (sscanf(version, "%hu.%hu", &major, &minor) != 2) {
@@ -177,7 +198,7 @@ mkjcgheader(struct jcg_header *h, size_t psize, char *version)
        memset(h, 0, sizeof(*h));
        h->jh_magic = htonl(JH_MAGIC);
        h->jh_type  = htonl(1);
-       h->jh_time  = htonl(time(NULL));
+       h->jh_time  = htonl(t);
        h->jh_major = htons(major);
        h->jh_minor = htons(minor);
 
@@ -303,6 +324,7 @@ main(int argc, char **argv)
        /* Make sure the headers have the right size */
        assert(sizeof(struct jcg_header) == 512);
        assert(sizeof(struct uimage_header) == 64);
+       set_source_date_epoch();
 
        while ((c = getopt(argc, argv, "o:k:f:u:v:h")) != -1) {
                switch (c) {

diff --git a/src/mkrtn56uimg.c b/src/mkrtn56uimg.c
index fe9ae2c877343434ae10bae0f7a432bd2278193e..92aaf314a1757cfc5d237d4b2320877cdb8a2bd9 100644 (file)
--- a/src/mkrtn56uimg.c
+++ b/src/mkrtn56uimg.c
@@ -17,7 +17,6 @@
 #include <netinet/in.h>
 #include <sys/mman.h>
 #include <sys/stat.h>
-#include <time.h>
 #include <unistd.h>
 #include <zlib.h>
 

diff --git a/src/spw303v.c b/src/spw303v.c
index 654d68db2b08eedb3ee55d1edb52bc999460f59f..684532d7e11ccb320fb3c20a0e98b48b31218608 100644 (file)
--- a/src/spw303v.c
+++ b/src/spw303v.c
@@ -23,7 +23,6 @@
 #include <stdlib.h>
 #include <string.h>
 #include <stdint.h>
-#include <time.h>
 #include <unistd.h>
 #include <sys/stat.h>
 

diff --git a/src/tplink-safeloader.c b/src/tplink-safeloader.c
index fd4c2ab70d731447b27229357192c448b5e8c1df..d2a1cb69ed317ec32754ce7eacfb56269c96098f 100644 (file)
--- a/src/tplink-safeloader.c
+++ b/src/tplink-safeloader.c
@@ -709,6 +709,20 @@ static void free_image_partition(struct image_partition_entry entry) {
        free(entry.data);
 }
 
+static time_t source_date_epoch = -1;
+static void set_source_date_epoch() {
+       char *env = getenv("SOURCE_DATE_EPOCH");
+       char *endptr = env;
+       errno = 0;
+        if (env && *env) {
+               source_date_epoch = strtoull(env, &endptr, 10);
+               if (errno || (endptr && *endptr != '\0')) {
+                       fprintf(stderr, "Invalid SOURCE_DATE_EPOCH");
+                       exit(1);
+               }
+        }
+}
+
 /** Generates the partition-table partition */
 static struct image_partition_entry make_partition_table(const struct flash_partition_entry *p) {
        struct image_partition_entry entry = alloc_image_partition("partition-table", 0x800);
@@ -752,7 +766,9 @@ static struct image_partition_entry make_soft_version(uint32_t rev) {
 
        time_t t;
 
-       if (time(&t) == (time_t)(-1))
+       if (source_date_epoch != -1)
+               t = source_date_epoch;
+       else if (time(&t) == (time_t)(-1))
                error(1, errno, "time");
 
        struct tm *tm = localtime(&t);
@@ -1105,6 +1121,7 @@ int main(int argc, char *argv[]) {
        bool add_jffs2_eof = false, sysupgrade = false;
        unsigned rev = 0;
        const struct device_info *info;
+       set_source_date_epoch();
 
        while (true) {
                int c;

diff --git a/src/xorimage.c b/src/xorimage.c
index b5ab83fa7a65159810d75126008b12482bf1cbad..ca6e43742a18033df41ecd8d584ea06a9843cc1e 100644 (file)
--- a/src/xorimage.c
+++ b/src/xorimage.c
@@ -21,7 +21,6 @@
 #include <stdlib.h>
 #include <string.h>
 #include <stdint.h>
-#include <time.h>
 #include <unistd.h>
 #include <sys/stat.h>
 

diff --git a/src/zyxbcm.c b/src/zyxbcm.c
index ffeb7cc2650e41b94acbf062c19ac953ab78a95c..1a2926bfd31cbc946f14f057361fae02a5c3475a 100644 (file)
--- a/src/zyxbcm.c
+++ b/src/zyxbcm.c
@@ -23,7 +23,6 @@
 #include <stdlib.h>
 #include <string.h>
 #include <stdint.h>
-#include <time.h>
 #include <unistd.h>
 #include <sys/stat.h>