Decode relevant request information

Cargo.lock

@@ -17,18 +17,6 @@ version = "2.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "512761e0bb2578dd7380c6baaa0f4ce03e84f95e960231d1dec8bf4d7d6e2627"
 
-[[package]]
-name = "ahash"
-version = "0.8.11"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e89da841a80418a9b391ebaea17f5c112ffaaa96f621d2c285b5174da76b9011"
-dependencies = [
- "cfg-if",
- "once_cell",
- "version_check",
- "zerocopy",
-]
-
 [[package]]
 name = "aho-corasick"
 version = "1.1.3"
@@ -38,12 +26,6 @@ dependencies = [
  "memchr",
 ]
 
-[[package]]
-name = "allocator-api2"
-version = "0.2.21"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "683d7910e743518b0e34f1186f92494becacb047c7b6bf616c96772180fef923"
-
 [[package]]
 name = "anstream"
 version = "0.6.18"
@@ -111,12 +93,6 @@ dependencies = [
  "syn",
 ]
 
-[[package]]
-name = "autocfg"
-version = "1.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ace50bade8e6234aa140d9a2f552bbee1db4d353f69b8217bc503490fc1a9f26"
-
 [[package]]
 name = "backtrace"
 version = "0.3.74"
@@ -144,28 +120,6 @@ version = "2.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5c8214115b7bf84099f1309324e63141d4c5d7cc26862f97a0a857dbefe165bd"
 
-[[package]]
-name = "bitvec"
-version = "1.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1bc2832c24239b0141d5674bb9174f9d68a8b5b3f2753311927c172ca46f7e9c"
-dependencies = [
- "funty",
- "radium",
- "tap",
- "wyz",
-]
-
-[[package]]
-name = "bitvec-nom2"
-version = "0.2.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d988fcc40055ceaa85edc55875a08f8abd29018582647fd82ad6128dba14a5f0"
-dependencies = [
- "bitvec",
- "nom",
-]
-
 [[package]]
 name = "block-buffer"
 version = "0.10.4"
@@ -187,15 +141,6 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
-[[package]]
-name = "chrono"
-version = "0.4.40"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1a7964611d71df112cb1730f2ee67324fcf4d0fc6606acbbe9bfe06df124637c"
-dependencies = [
- "num-traits",
-]
-
 [[package]]
 name = "clap"
 version = "4.5.31"
@@ -291,12 +236,6 @@ dependencies = [
  "syn",
 ]
 
-[[package]]
-name = "either"
-version = "1.15.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "48c757948c5ede0e46177b7add2e67155f70e33c07fea8284df6576da70b3719"
-
 [[package]]
 name = "env_filter"
 version = "0.1.3"
@@ -320,6 +259,22 @@ dependencies = [
  "log",
 ]
 
+[[package]]
+name = "errno"
+version = "0.3.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "33d852cb9b869c2a9b3df2f71a3074817f01e1844f839a144f5fcef059a4eb5d"
+dependencies = [
+ "libc",
+ "windows-sys",
+]
+
+[[package]]
+name = "fastrand"
+version = "2.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "37909eebbb50d72f9059c3b6d82c0463f2ff062c9e95845c43a6c9c0355411be"
+
 [[package]]
 name = "fnv"
 version = "1.0.7"
@@ -335,12 +290,6 @@ dependencies = [
  "percent-encoding",
 ]
 
-[[package]]
-name = "funty"
-version = "2.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e6d5a32815ae3f33302d95fdcb2ce17862f8c65363dcfd29360480ba1001fc9c"
-
 [[package]]
 name = "generic-array"
 version = "0.14.7"
@@ -369,16 +318,6 @@ version = "0.31.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "07e28edb80900c19c28f1072f2e8aeca7fa06b23cd4169cefe1af5aa3260783f"
 
-[[package]]
-name = "hashbrown"
-version = "0.14.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e5274423e17b7c9fc20b6e7e208532f9b19825d82dfd615708b70edd83df41f1"
-dependencies = [
- "ahash",
- "allocator-api2",
-]
-
 [[package]]
 name = "heck"
 version = "0.5.0"
@@ -553,15 +492,6 @@ version = "1.70.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7943c866cc5cd64cbc25b2e01621d07fa8eb2a1a23160ee81ce38704e97b8ecf"
 
-[[package]]
-name = "itertools"
-version = "0.13.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "413ee7dfc52ee1a4949ceeb7dbc8a33f2d6c088194d9f922fb8318faf1f01186"
-dependencies = [
- "either",
-]
-
 [[package]]
 name = "itoa"
 version = "1.0.15"
@@ -574,6 +504,12 @@ version = "0.2.170"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "875b3680cb2f8f71bdcf9a30f38d48282f5d3c95cbf9b3fa57269bb5d5c06828"
 
+[[package]]
+name = "linux-raw-sys"
+version = "0.9.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6db9c683daf087dc577b7506e9695b3d556a9f3849903fa28186283afd6809e9"
+
 [[package]]
 name = "litemap"
 version = "0.7.5"
@@ -592,12 +528,6 @@ version = "2.7.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
 
-[[package]]
-name = "minimal-lexical"
-version = "0.2.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "68354c5c6bd36d73ff3feceb05efa59b6acb7626617f4962be322a825e61f79a"
-
 [[package]]
 name = "miniz_oxide"
 version = "0.8.5"
@@ -607,44 +537,6 @@ dependencies = [
  "adler2",
 ]
 
-[[package]]
-name = "nom"
-version = "7.1.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d273983c5a657a70a3e8f2a01329822f3b8c8172b73826411a55751e404a0a4a"
-dependencies = [
- "memchr",
- "minimal-lexical",
-]
-
-[[package]]
-name = "num-bigint"
-version = "0.4.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a5e44f723f1133c9deac646763579fdb3ac745e418f2a7af9cd0c431da1f20b9"
-dependencies = [
- "num-integer",
- "num-traits",
-]
-
-[[package]]
-name = "num-integer"
-version = "0.1.46"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7969661fd2958a5cb096e56c8e1ad0444ac2bbcd0061bd28660485a44879858f"
-dependencies = [
- "num-traits",
-]
-
-[[package]]
-name = "num-traits"
-version = "0.2.19"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "071dfc062690e90b734c0b2273ce72ad0ffa95f0c74596bc250dcfd960262841"
-dependencies = [
- "autocfg",
-]
-
 [[package]]
 name = "object"
 version = "0.36.7"
@@ -690,59 +582,6 @@ dependencies = [
  "proc-macro2",
 ]
 
-[[package]]
-name = "radium"
-version = "0.7.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dc33ff2d4973d518d823d61aa239014831e521c75da58e3df4840d3f47749d09"
-
-[[package]]
-name = "rasn"
-version = "0.24.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3dc2d7ef9630c50239937d1eeb07e4fd3129c016441c5276b087f7975eb4e2c2"
-dependencies = [
- "bitvec",
- "bitvec-nom2",
- "bytes",
- "chrono",
- "either",
- "hashbrown",
- "nom",
- "num-bigint",
- "num-integer",
- "num-traits",
- "once_cell",
- "rasn-derive",
- "serde_json",
- "snafu",
-]
-
-[[package]]
-name = "rasn-derive"
-version = "0.24.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9d5c332ddd8ace677cf246699782a34b79cbfa484c73523578f3c7d883dc8813"
-dependencies = [
- "proc-macro2",
- "rasn-derive-impl",
- "syn",
-]
-
-[[package]]
-name = "rasn-derive-impl"
-version = "0.24.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6cb5b4227db5fc7d1743a6089f4f43617b76b636d2d4293aade6144bc64a4c90"
-dependencies = [
- "either",
- "itertools",
- "proc-macro2",
- "quote",
- "syn",
- "uuid",
-]
-
 [[package]]
 name = "regex"
 version = "1.11.1"
@@ -779,10 +618,17 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "719b953e2095829ee67db738b3bfa9fa368c94900df327b3f07fe6e794d2fe1f"
 
 [[package]]
-name = "ryu"
+name = "rustix"
-version = "1.0.20"
+version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "28d3b2b1366ec20994f1fd18c3c594f05c5dd4bc44d8bb0c1c632c8d6829481f"
+checksum = "17f8dcd64f141950290e45c99f7710ede1b600297c91818bb30b3667c0f45dc0"
+dependencies = [
+ "bitflags",
+ "errno",
+ "libc",
+ "linux-raw-sys",
+ "windows-sys",
+]
 
 [[package]]
 name = "scep_req_parser"
@@ -793,10 +639,11 @@ dependencies = [
  "clap",
  "colored",
  "env_logger",
+ "hex",
  "http",
  "log",
- "rasn",
  "sha256",
+ "tempfile",
  "url",
 ]
 
@@ -820,18 +667,6 @@ dependencies = [
  "syn",
 ]
 
-[[package]]
-name = "serde_json"
-version = "1.0.140"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "20068b6e96dc6c9bd23e01df8827e6c7e1f2fddd43c21810382803c136b99373"
-dependencies = [
- "itoa",
- "memchr",
- "ryu",
- "serde",
-]
-
 [[package]]
 name = "sha2"
 version = "0.10.8"
@@ -862,27 +697,6 @@ version = "1.14.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7fcf8323ef1faaee30a44a340193b1ac6814fd9b7b4e88e9d4519a3e4abe1cfd"
 
-[[package]]
-name = "snafu"
-version = "0.8.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "223891c85e2a29c3fe8fb900c1fae5e69c2e42415e3177752e8718475efa5019"
-dependencies = [
- "snafu-derive",
-]
-
-[[package]]
-name = "snafu-derive"
-version = "0.8.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "03c3c6b7927ffe7ecaa769ee0e3994da3b8cafc8f444578982c83ecb161af917"
-dependencies = [
- "heck",
- "proc-macro2",
- "quote",
- "syn",
-]
-
 [[package]]
 name = "stable_deref_trait"
 version = "1.2.0"
@@ -918,10 +732,18 @@ dependencies = [
 ]
 
 [[package]]
-name = "tap"
+name = "tempfile"
-version = "1.0.1"
+version = "3.18.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "55937e1799185b12863d447f42597ed69d9928686b8d88a1df17376a097d8369"
+checksum = "2c317e0a526ee6120d8dabad239c8dadca62b24b6f168914bbbc8e2fb1f0e567"
+dependencies = [
+ "cfg-if",
+ "fastrand",
+ "getrandom",
+ "once_cell",
+ "rustix",
+ "windows-sys",
+]
 
 [[package]]
 name = "tinystr"
@@ -985,15 +807,6 @@ version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "06abde3611657adf66d383f00b093d7faecc7fa57071cce2578660c9f1010821"
 
-[[package]]
-name = "uuid"
-version = "1.15.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e0f540e3240398cce6128b64ba83fdbdd86129c16a3aa1a3a252efd66eb3d587"
-dependencies = [
- "getrandom",
-]
-
 [[package]]
 name = "version_check"
 version = "0.9.5"
@@ -1103,15 +916,6 @@ version = "0.5.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1e9df38ee2d2c3c5948ea468a8406ff0db0b29ae1ffde1bcf20ef305bcc95c51"
 
-[[package]]
-name = "wyz"
-version = "0.5.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "05f360fc0b24296329c78fda852a1e9ae82de9cf7b27dae4b7f62f118f77b9ed"
-dependencies = [
- "tap",
-]
-
 [[package]]
 name = "yoke"
 version = "0.7.5"
@@ -1136,26 +940,6 @@ dependencies = [
  "synstructure",
 ]
 
-[[package]]
-name = "zerocopy"
-version = "0.7.35"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1b9b4fd18abc82b8136838da5d50bae7bdea537c574d8dc1a34ed098d6c166f0"
-dependencies = [
- "zerocopy-derive",
-]
-
-[[package]]
-name = "zerocopy-derive"
-version = "0.7.35"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fa4f8080344d4671fb4e831a13ad1e68092748387dfc4f55e356242fae12ce3e"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
-]
-
 [[package]]
 name = "zerofrom"
 version = "0.1.6"

Cargo.toml

@@ -13,4 +13,5 @@ url = "2.5.4"
 base64 = "0.22.1"
 sha256 = "1.6.0"
 colored = "3.0.0"
-rasn = "0.24.0"
+tempfile = "3.18.0"
+hex = "0.4.3"

src/asn_parsing.rs

@@ -1,7 +1,65 @@
-#[derive(Debug)]
+use std::io::Write;
-pub struct SCEPEnveloppedPayload {}
+use std::process::{Command};
+use anyhow::Context;
+use tempfile::NamedTempFile;
+
+#[derive(Debug, Default)]
+pub struct SCEPEnvelopedPayload {
+    cn: String,
+    alt_name: String,
+}
+
+/// Parse asn1 content
+fn parse_asn1(openssl: &str, req: &[u8]) -> anyhow::Result<String> {
+    let mut tmpfile: NamedTempFile = NamedTempFile::new()?;
+    tmpfile.write_all(req)?;
+    tmpfile.flush()?;
+
+    let stdout = Command::new(openssl)
+        .arg("asn1parse")
+        .arg("-inform")
+        .arg("DER")
+        .arg("-in")
+        .arg(tmpfile.path().to_str().unwrap())
+        .output()?;
+
+    Ok(String::from_utf8_lossy(&stdout.stdout).to_string())
+}
 
 /// Decode SCEP request
-pub fn decode_request(req: &[u8]) -> anyhow::Result<SCEPEnveloppedPayload> {
+pub fn decode_request(openssl: &str, req: &[u8]) -> anyhow::Result<SCEPEnvelopedPayload> {
-    todo!()
+    let output = parse_asn1(openssl, req)?;
+    let output = output.trim().replace('\r', "");
+    log::debug!("ASN1 request output: {output}");
+    let lines = output.split('\n').collect::<Vec<&str>>();
+
+    let mut res = SCEPEnvelopedPayload::default();
+
+    for (num, line) in lines.iter().enumerate() {
+        // Extract common name
+        if line.contains(":commonName") {
+            res.cn = lines[num + 1].split_once("PRINTABLESTRING").unwrap().1.split_once(':').unwrap().1.to_string();
+        }
+
+        // Extract subject alternative name
+        if line.contains("Subject Alternative Name") {
+            let subj_rev = lines[num + 2].rsplit_once(':').unwrap().1;
+            let sub_alt_name = hex::decode(subj_rev.trim()).context("Subject Alternative Name")?;
+
+            let res_decode_alt_name = parse_asn1(openssl, &sub_alt_name)?;
+            let res_decode_alt_name = res_decode_alt_name.replace('\r', "");
+            log::debug!("Subject alternative name: {res_decode_alt_name}");
+
+            // Extract Microsoft User Principal Name
+            let subj_alt_name_lines = res_decode_alt_name.split('\n').collect::<Vec<&str>>();
+            for (num, line) in subj_alt_name_lines.iter().enumerate() {
+                if line.contains("Microsoft User Principal Name") {
+                    res.alt_name = subj_alt_name_lines[num + 2].split_once("UTF8STRING").unwrap().1.split_once(':').unwrap().1.to_string();
+                }
+            }
+        }
+    }
+
+
+    Ok(res)
 }

src/main.rs

@@ -22,6 +22,10 @@ struct Args {
     /// Display decoding URL (lapo.it)
     #[arg(short('d'), long)]
     decode_url: bool,
+
+    /// OpenSSL command path
+    #[arg(short('o'), long, default_value = "openssl", env)]
+    openssl_command: String,
 }
 
 
@@ -80,7 +84,7 @@ fn main() {
     }
 
     if op == Operation::PKIOperation  {
-        let req = decode_request(request.body()).expect("Failed to decode request!");
+        let req = decode_request(&args.openssl_command, request.body()).expect("Failed to decode request!");
         println!("{req:?}");
     }