From 8530a4218521056b7a12ad6493de5605b620a9a5 Mon Sep 17 00:00:00 2001
From: Juliette Pretot <julsh@google.com>
Date: Mon, 20 May 2024 15:03:05 +0000
Subject: [PATCH] Update deprecated method use for base64 crate

Change-Id: Ic8a145734fddfe8dda4c99051c62af11286c9a7a
---
 Cargo.lock                         | 8 +++++++-
 oak_attestation_explain/src/lib.rs | 6 ++++--
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index d3dca545715..8e88ca324bc 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -342,6 +342,12 @@ version = "0.21.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9d297deb1925b89f2ccc13d7635fa0714f12c87adce1c75356b39ca9b7178567"
 
+[[package]]
+name = "base64"
+version = "0.22.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "72b3254f16251a8381aa12e40e3c4d2f0199f8c6508fbecb9d91f575e0fbb8c6"
+
 [[package]]
 name = "base64ct"
 version = "1.6.0"
@@ -2322,7 +2328,7 @@ name = "oak_attestation_explain"
 version = "0.1.0"
 dependencies = [
  "anyhow",
- "base64 0.13.1",
+ "base64 0.22.1",
  "hex",
  "oak_attestation_verification",
  "oak_attestation_verification_test_utils",
diff --git a/oak_attestation_explain/src/lib.rs b/oak_attestation_explain/src/lib.rs
index 1eb482790b7..50352239b7d 100644
--- a/oak_attestation_explain/src/lib.rs
+++ b/oak_attestation_explain/src/lib.rs
@@ -24,6 +24,7 @@ extern crate std;
 use alloc::{format, string::String};
 
 use anyhow::{Context, Result};
+use base64::{prelude::BASE64_STANDARD, Engine as _};
 use oak_proto_rust::oak::{
     attestation::v1::{
         root_layer_data::Report, ApplicationLayerData, ApplicationLayerReferenceValues,
@@ -85,8 +86,9 @@ fn make_reference_values_human_readable(value: &mut serde_yaml::Value) {
                     // The proto3 JSON mapping spec uses base64 encoding.
                     let base64_encoded_hash =
                         hash_value.as_str().expect("validated as string in prior conditional");
-                    let hash =
-                        base64::decode(base64_encoded_hash).expect("invalid base64 digest hash");
+                    let hash = BASE64_STANDARD
+                        .decode(base64_encoded_hash)
+                        .expect("invalid base64 digest hash");
                     *hash_value = serde_yaml::Value::String(hex::encode(hash));
                 })
             };