From bf354372ff3b3a1eeb7250ede7ef0699de66e3d2 Mon Sep 17 00:00:00 2001
From: ENGO150 <v.smejkal06@gmail.com>
Date: Sat, 1 Feb 2025 13:03:03 +0100
Subject: [PATCH] created why2_chat_ecc_deserialize_public_key fn

---
 include/chat/crypto.h |  1 +
 src/chat/crypto.c     | 18 ++++++++++++++++++
 2 files changed, 19 insertions(+)

diff --git a/include/chat/crypto.h b/include/chat/crypto.h
index 0230b39..8f62225 100644
--- a/include/chat/crypto.h
+++ b/include/chat/crypto.h
@@ -44,6 +44,7 @@ char *why2_chat_ecc_sign(char *message); //SIGN message WITH ECC KEY
 why2_bool why2_chat_ecc_verify_signature(char *message, char *signature, EVP_PKEY *key);
 
 char *why2_chat_ecc_serialize_public_key(); //GET PUBLIC ECC KEY IN BASE64
+EVP_PKEY* why2_chat_ecc_deserialize_public_key(char *pubkey); //GET EVP_PKEY FROM BASE64 PUBLIC ECC KEY
 
 char *why2_sha256(char *input); //HASH input USING SHA256 AND RETURN IN STRING
 
diff --git a/src/chat/crypto.c b/src/chat/crypto.c
index b14871f..76a8734 100644
--- a/src/chat/crypto.c
+++ b/src/chat/crypto.c
@@ -223,6 +223,24 @@ char *why2_chat_ecc_serialize_public_key()
     return base64_encoded;
 }
 
+//TODO: Remove PEM
+EVP_PKEY* why2_chat_ecc_deserialize_public_key(char *pubkey)
+{
+    //VARIABLES
+    BIO *bio;
+    EVP_PKEY *key;
+    char *base64_decoded = base64_decode(pubkey, NULL);
+
+    //EXTRACT KEY
+    bio = BIO_new_mem_buf(base64_decoded, -1);
+    key = PEM_read_bio_PUBKEY(bio, NULL, NULL, NULL);
+
+    //DEALLOCATION
+    BIO_free(bio);
+
+    return key;
+}
+
 void why2_chat_deallocate_keys(void)
 {
     //DEALLOCATE THE pkey