Add: compute SHA256

3 files changed, 163 insertions, 1 deletions

diff --git a/Cargo.lock b/Cargo.lock
index fa93716..3db1943 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,4 +1,19 @@
 [[package]]
+name = "bitflags"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "cc"
+version = "1.0.25"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "cfg-if"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
 name = "chrono"
 version = "0.4.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -9,6 +24,59 @@ dependencies = [
 ]
 
 [[package]]
+name = "commoncrypto"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "commoncrypto-sys 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "commoncrypto-sys"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.43 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "crypto-hash"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "commoncrypto 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "hex 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "openssl 0.10.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "foreign-types"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "foreign-types-shared 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "foreign-types-shared"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "hex"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "lazy_static"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "version_check 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
 name = "libc"
 version = "0.2.43"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -27,6 +95,35 @@ version = "0.2.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
+name = "openssl"
+version = "0.10.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-if 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "foreign-types 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.43 (registry+https://github.com/rust-lang/crates.io-index)",
+ "openssl-sys 0.9.36 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "openssl-sys"
+version = "0.9.36"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "cc 1.0.25 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.43 (registry+https://github.com/rust-lang/crates.io-index)",
+ "pkg-config 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "vcpkg 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "pkg-config"
+version = "0.3.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
 name = "redox_syscall"
 version = "0.1.40"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -36,6 +133,8 @@ name = "summainrs"
 version = "0.1.0"
 dependencies = [
  "chrono 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "crypto-hash 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "hex 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "users 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -58,6 +157,16 @@ dependencies = [
 ]
 
 [[package]]
+name = "vcpkg"
+version = "0.2.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "version_check"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
 name = "winapi"
 version = "0.3.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -77,13 +186,28 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [metadata]
+"checksum bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "228047a76f468627ca71776ecdebd732a3423081fcf5125585bcd7c49886ce12"
+"checksum cc 1.0.25 (registry+https://github.com/rust-lang/crates.io-index)" = "f159dfd43363c4d08055a07703eb7a3406b0dac4d0584d96965a3262db3c9d16"
+"checksum cfg-if 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "0c4e7bb64a8ebb0d856483e1e682ea3422f883c5f5615a90d51a2c82fe87fdd3"
 "checksum chrono 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)" = "45912881121cb26fad7c38c17ba7daa18764771836b34fab7d3fbd93ed633878"
+"checksum commoncrypto 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d056a8586ba25a1e4d61cb090900e495952c7886786fc55f909ab2f819b69007"
+"checksum commoncrypto-sys 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1fed34f46747aa73dfaa578069fd8279d2818ade2b55f38f22a9401c7f4083e2"
+"checksum crypto-hash 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "09de9ee0fc255ace04c7fa0763c9395a945c37c8292bb554f8d48361d1dcf1b4"
+"checksum foreign-types 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "f6f339eb8adc052cd2ca78910fda869aefa38d22d5cb648e6485e4d3fc06f3b1"
+"checksum foreign-types-shared 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "00b0228411908ca8685dba7fc2cdd70ec9990a6e753e89b6ac91a84c40fbaf4b"
+"checksum hex 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)" = "805026a5d0141ffc30abb3be3173848ad46a1b1664fe632428479619a3644d77"
+"checksum lazy_static 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ca488b89a5657b0a2ecd45b95609b3e848cf1755da332a0da46e2b2b1cb371a7"
 "checksum libc 0.2.43 (registry+https://github.com/rust-lang/crates.io-index)" = "76e3a3ef172f1a0b9a9ff0dd1491ae5e6c948b94479a3021819ba7d860c8645d"
 "checksum num-integer 0.1.39 (registry+https://github.com/rust-lang/crates.io-index)" = "e83d528d2677f0518c570baf2b7abdcf0cd2d248860b68507bdcb3e91d4c0cea"
 "checksum num-traits 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)" = "0b3a5d7cc97d6d30d8b9bc8fa19bf45349ffe46241e8816f50f62f6d6aaabee1"
+"checksum openssl 0.10.12 (registry+https://github.com/rust-lang/crates.io-index)" = "5e2e79eede055813a3ac52fb3915caf8e1c9da2dec1587871aec9f6f7b48508d"
+"checksum openssl-sys 0.9.36 (registry+https://github.com/rust-lang/crates.io-index)" = "409d77eeb492a1aebd6eb322b2ee72ff7c7496b4434d98b3bf8be038755de65e"
+"checksum pkg-config 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)" = "676e8eb2b1b4c9043511a9b7bea0915320d7e502b0a079fb03f9635a5252b18c"
 "checksum redox_syscall 0.1.40 (registry+https://github.com/rust-lang/crates.io-index)" = "c214e91d3ecf43e9a4e41e578973adeb14b474f2bee858742d127af75a0112b1"
 "checksum time 0.1.40 (registry+https://github.com/rust-lang/crates.io-index)" = "d825be0eb33fda1a7e68012d51e9c7f451dc1a69391e7fdc197060bb8c56667b"
 "checksum users 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "caa2760fcc10a6ae2c2a35d41c5d69827e4663f0d3889ecfb4d60b343f4139df"
+"checksum vcpkg 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)" = "def296d3eb3b12371b2c7d0e83bfe1403e4db2d7a0bba324a12b21c4ee13143d"
+"checksum version_check 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "914b1a6776c4c929a602fafd8bc742e06365d4bcbe48c30f9cca5824f70dc9dd"
 "checksum winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "92c1eb33641e276cfa214a0522acad57be5c56b10cb348b3c5117db75f3ac4b0"
 "checksum winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
 "checksum winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
diff --git a/Cargo.toml b/Cargo.toml
index e07127a..3d413bc 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,3 +6,5 @@ authors = ["Lars Wirzenius <liw@liw.fi>"]
 [dependencies]
 users = "0.7"
 chrono = "0.4.6"
+crypto-hash = "0.3.1"
+hex = "0.3.2"
diff --git a/src/main.rs b/src/main.rs
index 20499d8..cac0646 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -3,6 +3,7 @@ use std::io;
 use std::fs;
 use std::os::unix::fs::PermissionsExt;
 use std::os::linux::fs::MetadataExt;
+use std::io::prelude::*;
 
 extern crate users;
 
@@ -10,6 +11,11 @@ extern crate chrono;
 use chrono::prelude::DateTime;
 use chrono::{Utc};
 
+extern crate crypto_hash;
+use crypto_hash::{Algorithm, Hasher};
+
+extern crate hex;
+
 mod fswalk;
 use fswalk::DirTree;
 
@@ -38,7 +44,7 @@ fn write_info(path: &str, meta: &fs::Metadata) {
     println!("Username: {}", format_username(meta));
     println!("Gid: {}", format_gid(meta));
     println!("Group: {}", format_group(meta));
-    println!("SHA256: xxx");
+    println!("SHA256: {}", format_sha256(path));
     println!("");
 }
 
@@ -102,3 +108,33 @@ fn format_group(meta: &fs::Metadata) -> String {
         format!("unknown group")
     }
 }
+
+
+fn format_sha256(filename: &str) -> String {
+    let mut ok = true;
+    let mut hasher = Hasher::new(Algorithm::SHA256);
+    if let Ok(file) = fs::File::open(filename) {
+        let mut reader = io::BufReader::new(file);
+        let mut buf = [0; 1024 * 1024];
+        let mut done = false;
+        while ok && !done{
+            if let Ok(n) = reader.read(&mut buf) {
+                if n == 0 {
+                    done = true;
+                } else if let Err(_) = hasher.write(&buf[0..n]) {
+                    ok = false;
+                }
+            } else {
+                ok = false;
+            }
+        }
+    } else {
+        ok = false;
+    }
+    if ok {
+        let digest = hasher.finish();
+        hex::encode(digest)
+    } else {
+        format!("can't read file")
+    }
+}