diff options
Diffstat (limited to 'filesystem/bootimg.go')
| -rw-r--r-- | filesystem/bootimg.go | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/filesystem/bootimg.go b/filesystem/bootimg.go index 33beb37bf..352b45178 100644 --- a/filesystem/bootimg.go +++ b/filesystem/bootimg.go @@ -228,6 +228,15 @@ func (b *bootimg) signImage(ctx android.ModuleContext, unsignedImage android.Out return output } +// Calculates avb_salt from some input for deterministic output. +func (b *bootimg) salt() string { + var input []string + input = append(input, b.properties.Cmdline...) + input = append(input, proptools.StringDefault(b.properties.Partition_name, b.Name())) + input = append(input, proptools.String(b.properties.Header_version)) + return sha1sum(input) +} + func (b *bootimg) buildPropFile(ctx android.ModuleContext) (propFile android.OutputPath, toolDeps android.Paths) { var sb strings.Builder var deps android.Paths @@ -248,6 +257,7 @@ func (b *bootimg) buildPropFile(ctx android.ModuleContext) (propFile android.Out addStr("avb_add_hash_footer_args", "") // TODO(jiyong): add --rollback_index partitionName := proptools.StringDefault(b.properties.Partition_name, b.Name()) addStr("partition_name", partitionName) + addStr("avb_salt", b.salt()) propFile = android.PathForModuleOut(ctx, "prop").OutputPath android.WriteFileRule(ctx, propFile, sb.String()) |