bitbake: data/siggen: Switch md5 -> sha256

Similarly to the codeparser change, change to sha256 hashes due to worries
over collisions. The main impact of this change is slightly slower parsing
time as well as longer sstate file names.

(Bitbake rev: 66f1b766997d53b4375fdd25719b1175f3828903)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

diff --git a/bitbake/lib/bb/data.py b/bitbake/lib/bb/data.py
index 6bcfcf46cc9ed840c9d1e3684a066fbb899df6ec..29c2388038bc0b8887cbeccb5cddc4daadeda555 100644 (file)
--- a/bitbake/lib/bb/data.py
+++ b/bitbake/lib/bb/data.py
@@ -436,7 +436,7 @@ def generate_dependency_hash(tasklist, gendeps, lookupcache, whitelist, fn):
             if var is not None:
                 data = data + str(var)
         k = fn + "." + task
-        basehash[k] = hashlib.md5(data.encode("utf-8")).hexdigest()
+        basehash[k] = hashlib.sha256(data.encode("utf-8")).hexdigest()
         taskdeps[task] = alldeps
 
     return taskdeps, basehash

diff --git a/bitbake/lib/bb/data_smart.py b/bitbake/lib/bb/data_smart.py
index c342adaa0a10ddf486c3697429f9708f692ca04f..1f45cd975daeb09df0eece8a7db15604a5b7c7bd 100644 (file)
--- a/bitbake/lib/bb/data_smart.py
+++ b/bitbake/lib/bb/data_smart.py
@@ -1074,4 +1074,4 @@ class DataSmart(MutableMapping):
                     data.update({i:value})
 
         data_str = str([(k, data[k]) for k in sorted(data.keys())])
-        return hashlib.md5(data_str.encode("utf-8")).hexdigest()
+        return hashlib.sha256(data_str.encode("utf-8")).hexdigest()

diff --git a/bitbake/lib/bb/siggen.py b/bitbake/lib/bb/siggen.py
index 5508523f2da4534c8778458e21ed812897977edf..66aea793556e74901abd602f94c029251c474339 100644 (file)
--- a/bitbake/lib/bb/siggen.py
+++ b/bitbake/lib/bb/siggen.py
@@ -216,7 +216,7 @@ class SignatureGeneratorBasic(SignatureGenerator):
             self.taints[k] = taint
             logger.warning("%s is tainted from a forced run" % k)
 
-        h = hashlib.md5(data.encode("utf-8")).hexdigest()
+        h = hashlib.sha256(data.encode("utf-8")).hexdigest()
         self.taskhash[k] = h
         #d.setVar("BB_TASKHASH_task-%s" % task, taskhash[task])
         return h
@@ -650,7 +650,7 @@ def calc_basehash(sigdata):
         if val is not None:
             basedata = basedata + str(val)
 
-    return hashlib.md5(basedata.encode("utf-8")).hexdigest()
+    return hashlib.sha256(basedata.encode("utf-8")).hexdigest()
 
 def calc_taskhash(sigdata):
     data = sigdata['basehash']
@@ -668,7 +668,7 @@ def calc_taskhash(sigdata):
         else:
             data = data + sigdata['taint']
 
-    return hashlib.md5(data.encode("utf-8")).hexdigest()
+    return hashlib.sha256(data.encode("utf-8")).hexdigest()
 
 
 def dump_sigfile(a):