diff --git a/.idea/vcs.xml b/.idea/vcs.xml
index 79083a0..94a25f7 100644
--- a/.idea/vcs.xml
+++ b/.idea/vcs.xml
@@ -2,8 +2,5 @@
 <project version="4">
   <component name="VcsDirectoryMappings">
     <mapping directory="$PROJECT_DIR$" vcs="Git" />
-    <mapping directory="$PROJECT_DIR$/../pkg6depotd" vcs="Git" />
-    <mapping directory="$PROJECT_DIR$/../pkg6dev" vcs="Git" />
-    <mapping directory="$PROJECT_DIR$/../pkg6repo" vcs="Git" />
   </component>
 </project>
\ No newline at end of file
diff --git a/Cargo.lock b/Cargo.lock
index 5d2f1b6..0d8dcc3 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -44,12 +44,52 @@ dependencies = [
  "rustc-demangle",
 ]
 
+[[package]]
+name = "block-buffer"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4152116fd6e9dadb291ae18fc1ec3575ed6d84c29642d97890f4b4a3417297e4"
+dependencies = [
+ "block-padding",
+ "generic-array",
+]
+
+[[package]]
+name = "block-padding"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8d696c370c750c948ada61c69a0ee2cbbb9c50b1019ddb86d9317157a99c2cae"
+
 [[package]]
 name = "cfg-if"
 version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
+[[package]]
+name = "cpuid-bool"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8aebca1129a03dc6dc2b127edd729435bbc4a37e1d5f4d7513165089ceb02634"
+
+[[package]]
+name = "crc32fast"
+version = "1.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "81156fece84ab6a9f2afdb109ce3ae577e42b1228441eded99bd77f627953b1a"
+dependencies = [
+ "cfg-if",
+]
+
+[[package]]
+name = "digest"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d3dd60d1080a57a05ab032377049e0591415d2b31afd7028356dbf3cc6dcb066"
+dependencies = [
+ "generic-array",
+]
+
 [[package]]
 name = "failure"
 version = "0.1.8"
@@ -72,12 +112,40 @@ dependencies = [
  "synstructure",
 ]
 
+[[package]]
+name = "flate2"
+version = "1.0.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cd3aec53de10fe96d7d8c565eb17f2c687bb5518a2ec453b5b1252964526abe0"
+dependencies = [
+ "cfg-if",
+ "crc32fast",
+ "libc",
+ "miniz_oxide",
+]
+
+[[package]]
+name = "generic-array"
+version = "0.14.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "501466ecc8a30d1d3b7fc9229b122b2ce8ed6e9d9223f1138d4babb253e51817"
+dependencies = [
+ "typenum",
+ "version_check",
+]
+
 [[package]]
 name = "gimli"
 version = "0.23.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f6503fe142514ca4799d4c26297c4248239fe8838d827db6bd6065c6ed29a6ce"
 
+[[package]]
+name = "keccak"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "67c21572b4949434e4fc1e1978b99c5f77064153c59d998bf13ecd96fb5ecba7"
+
 [[package]]
 name = "libc"
 version = "0.2.90"
@@ -90,7 +158,10 @@ version = "0.0.2-placeholder"
 dependencies = [
  "failure",
  "maplit",
+ "object",
  "regex",
+ "sha2",
+ "sha3",
 ]
 
 [[package]]
@@ -120,6 +191,16 @@ name = "object"
 version = "0.23.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a9a7ab5d64814df0fe4a4b5ead45ed6c5f181ee3ff04ba344313a6c80446c5d4"
+dependencies = [
+ "flate2",
+ "wasmparser",
+]
+
+[[package]]
+name = "opaque-debug"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "624a8340c38c1b80fd549087862da4ba43e08858af025b236e509b6649fc13d5"
 
 [[package]]
 name = "pkg6depotd"
@@ -174,6 +255,31 @@ version = "0.1.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6e3bad0ee36814ca07d7968269dd4b7ec89ec2da10c4bb613928d3077083c232"
 
+[[package]]
+name = "sha2"
+version = "0.9.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fa827a14b29ab7f44778d14a88d3cb76e949c45083f7dbfa507d0cb699dc12de"
+dependencies = [
+ "block-buffer",
+ "cfg-if",
+ "cpuid-bool",
+ "digest",
+ "opaque-debug",
+]
+
+[[package]]
+name = "sha3"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f81199417d4e5de3f04b1e871023acea7389672c4135918f05aa9cbf2f2fa809"
+dependencies = [
+ "block-buffer",
+ "digest",
+ "keccak",
+ "opaque-debug",
+]
+
 [[package]]
 name = "syn"
 version = "1.0.64"
@@ -197,8 +303,26 @@ dependencies = [
  "unicode-xid",
 ]
 
+[[package]]
+name = "typenum"
+version = "1.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "879f6906492a7cd215bfa4cf595b600146ccfac0c79bcbd1f3000162af5e8b06"
+
 [[package]]
 name = "unicode-xid"
 version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f7fe0bb3479651439c9112f72b6c505038574c9fbb575ed1bf3b797fa39dd564"
+
+[[package]]
+name = "version_check"
+version = "0.9.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5fecdca9a5291cc2b8dcf7dc02453fee791a280f3743cb0905f8822ae463b3fe"
+
+[[package]]
+name = "wasmparser"
+version = "0.57.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "32fddd575d477c6e9702484139cf9f23dcd554b06d185ed0f56c857dd3a47aa6"
diff --git a/libips/Cargo.toml b/libips/Cargo.toml
index 06d4314..6d64750 100644
--- a/libips/Cargo.toml
+++ b/libips/Cargo.toml
@@ -18,4 +18,7 @@ keywords = ["packaging", "illumos"]
 [dependencies]
 regex = "1.3.7"
 failure = "0.1.8"
-maplit = "0.1.6"
\ No newline at end of file
+maplit = "0.1.6"
+object = "0.23.0"
+sha2 = "0.9.3"
+sha3 = "0.9.1"
\ No newline at end of file
diff --git a/libips/src/actions/mod.rs b/libips/src/actions/mod.rs
index f867530..fc78623 100644
--- a/libips/src/actions/mod.rs
+++ b/libips/src/actions/mod.rs
@@ -15,8 +15,9 @@ use crate::payload::Payload;
 use std::clone::Clone;
 use crate::digest::Digest;
 use std::str::FromStr;
+use std::path::{Path, PathBuf};
 
-trait FacetedAction {
+pub trait FacetedAction {
     // Add a facet to the action if the facet is already present the function returns false.
     fn add_facet(&mut self, facet: Facet) -> bool;
 
@@ -33,7 +34,7 @@ pub struct Action {
 }
 
 impl Action {
-    fn new(kind: ActionKind) -> Action{
+    pub fn new(kind: ActionKind) -> Action{
         Action{
             kind,
             payload: Payload::default(),
@@ -90,6 +91,21 @@ pub struct File {
     pub facets: HashSet<Facet>,
 }
 
+impl File {
+    pub fn read_from_path(p: &Path) -> Result<File, Error> {
+        let mut f = File::default();
+        f.payload = Payload::compute_payload(p)?;
+        match p.to_str() {
+            Some(str) => f.path = str.to_string(),
+            None => return Err(FileError::FilePathIsNoStringError)?,
+        }
+
+        //TODO group owner mode
+
+        Ok(f)
+    }
+}
+
 impl FacetedAction for File {
     fn add_facet(&mut self, facet: Facet) -> bool {
         return self.facets.insert(facet)
@@ -100,6 +116,12 @@ impl FacetedAction for File {
     }
 }
 
+#[derive(Debug, Fail)]
+pub enum FileError {
+    #[fail(display = "file path is not a string")]
+    FilePathIsNoStringError,
+}
+
 //TODO implement multiple FMRI for require-any
 #[derive(Debug, Default)]
 pub struct Dependency {
@@ -157,10 +179,14 @@ impl Manifest {
             dependencies: Vec::new(),
         };
     }
+
+    pub fn add_file(&mut self, f: File) {
+        self.files.push(f);
+    }
 }
 
 #[derive(Debug)]
-enum ActionKind {
+pub enum ActionKind {
     Attr,
     Dir,
     File,
diff --git a/libips/src/digest/mod.rs b/libips/src/digest/mod.rs
index bcd7ad7..92b3327 100644
--- a/libips/src/digest/mod.rs
+++ b/libips/src/digest/mod.rs
@@ -4,6 +4,10 @@
 //  obtain one at https://mozilla.org/MPL/2.0/.
 
 use std::str::FromStr;
+use sha2::{Digest as Sha2Digest};
+use sha3::{Digest as Sha3Digest};
+
+static DEFAULT_ALGORITHM: DigestAlgorithm = DigestAlgorithm::SHA512;
 
 #[derive(Debug, PartialEq)]
 pub enum DigestAlgorithm {
@@ -85,6 +89,35 @@ impl FromStr for Digest {
     }
 }
 
+impl Digest {
+    pub fn from_bytes(b: &[u8], algo: DigestAlgorithm, src: DigestSource) -> Result<Self, failure::Error> {
+        let hash = match algo {
+            DigestAlgorithm::SHA256=> {
+                format!("{:x}", sha2::Sha256::digest(b))
+            }
+            DigestAlgorithm::SHA512Half => {
+                format!("{:x}", sha2::Sha512Trunc256::digest(b))
+            }
+            DigestAlgorithm::SHA512 => {
+                format!("{:x}", sha2::Sha512::digest(b))
+            }
+            DigestAlgorithm::SHA3512Half | DigestAlgorithm::SHA3256 => {
+                format!("{:x}", sha3::Sha3_256::digest(b))
+            }
+            DigestAlgorithm::SHA3512 | _ => {
+                format!("{:x}", sha3::Sha3_512::digest(b))
+            }
+        };
+
+
+        Ok(Digest{
+            source: src,
+            algorithm: algo,
+            hash,
+        })
+    }
+}
+
 #[derive(Debug, Fail)]
 pub enum DigestError {
     #[fail(display = "hashing algorithm {} is not known by this library", algorithm)]
diff --git a/libips/src/lib.rs b/libips/src/lib.rs
index eeef24a..e5ec93e 100644
--- a/libips/src/lib.rs
+++ b/libips/src/lib.rs
@@ -3,9 +3,9 @@
 //  MPL was not distributed with this file, You can
 //  obtain one at https://mozilla.org/MPL/2.0/.
 
-mod actions;
-mod digest;
-mod payload;
+pub mod actions;
+pub mod digest;
+pub mod payload;
 
 #[macro_use] extern crate failure;
 #[macro_use] extern crate maplit;
diff --git a/libips/src/payload/mod.rs b/libips/src/payload/mod.rs
index b150e2d..77ab258 100644
--- a/libips/src/payload/mod.rs
+++ b/libips/src/payload/mod.rs
@@ -3,19 +3,22 @@
 //  MPL was not distributed with this file, You can
 //  obtain one at https://mozilla.org/MPL/2.0/.
 
-use crate::digest::Digest;
+use crate::digest::{Digest, DigestAlgorithm, DigestSource};
+use failure::Error;
+use object::Object;
+use std::path::Path;
 
-#[derive(Debug)]
+#[derive(Debug, PartialEq)]
 pub enum PayloadCompressionAlgorithm {
     Gzip,
     LZ4
 }
 
 impl Default for PayloadCompressionAlgorithm {
-    fn default() -> Self { PayloadCompressionAlgorithm::Gzip }
+    fn default() -> Self { PayloadCompressionAlgorithm::LZ4 }
 }
 
-#[derive(Debug)]
+#[derive(Debug, PartialEq)]
 pub enum PayloadBits {
     Independent,
     Bits32,
@@ -26,7 +29,7 @@ impl Default for PayloadBits {
     fn default() -> Self { PayloadBits::Independent }
 }
 
-#[derive(Debug)]
+#[derive(Debug, PartialEq)]
 pub enum PayloadArchitecture {
     NOARCH,
     I386,
@@ -46,4 +49,45 @@ pub struct Payload {
     pub compression_algorithm: PayloadCompressionAlgorithm,
     pub bitness: PayloadBits,
     pub architecture: PayloadArchitecture,
+}
+
+impl Payload {
+    pub fn is_elf(&self) -> bool {
+        self.architecture == PayloadArchitecture::NOARCH && self.bitness == PayloadBits::Independent
+    }
+
+    pub fn compute_payload(path: &Path) -> Result<Self, Error> {
+        let f = std::fs::read(path)?;
+
+        let (bitness, architecture) = match object::File::parse(f.as_slice()) {
+            Ok(bin) => {
+                let bitness = if bin.is_64() {
+                    PayloadBits::Bits64
+                } else {
+                    PayloadBits::Bits32
+                };
+
+                let architecture = match bin.architecture() {
+                    object::Architecture::X86_64 | object::Architecture::I386 => {
+                        PayloadArchitecture::I386
+                    }
+                    object::Architecture::Aarch64 | object::Architecture::Arm => {
+                        PayloadArchitecture::ARM
+                    }
+                    _ => PayloadArchitecture::NOARCH,
+                };
+
+                (bitness, architecture)
+            }
+            Err(_) => (PayloadBits::Independent, PayloadArchitecture::NOARCH),
+        };
+
+        Ok(Payload{
+            primary_identifier:Digest::from_bytes(f.as_slice(), DigestAlgorithm::SHA3512, DigestSource::PrimaryPayloadHash)?,
+            additional_identifiers: Vec::<Digest>::new(),
+            compression_algorithm: PayloadCompressionAlgorithm::default(),
+            bitness,
+            architecture
+        })
+    }
 }
\ No newline at end of file