From: Andre Noll <maan@tuebingen.mpg.de>
Date: Mon, 1 May 2023 19:43:18 +0000 (+0200)
Subject: openssl: Don't pass pointers to RSA structures around.
X-Git-Url: http://git.tue.mpg.de/?a=commitdiff_plain;h=c7c503371bfd0bc8a5b5da85653b1b8a1c68150e;p=paraslash.git

openssl: Don't pass pointers to RSA structures around.

The RSA structure has been made opaque in openssl-3. As a preparation
for not using this structure any more, pass pointers to the containing
asymmetric key structure instead.
---

diff --git a/openssl.c b/openssl.c
index 09d11e1e..e3416949 100644
--- a/openssl.c
+++ b/openssl.c
@@ -97,7 +97,8 @@ static int read_bignum(const unsigned char *buf, size_t len, BIGNUM **result)
 	return bnsize + 4;
 }
 
-static int read_public_key(const unsigned char *blob, int blen, RSA **result)
+static int read_public_key(const unsigned char *blob, int blen,
+		struct asymmetric_key *result)
 {
 	int ret;
 	RSA *rsa;
@@ -120,7 +121,7 @@ static int read_public_key(const unsigned char *blob, int blen, RSA **result)
 	rsa->n = n;
 	rsa->e = e;
 #endif
-	*result = rsa;
+	result->rsa = rsa;
 	return 1;
 free_e:
 	BN_free(e);
@@ -129,12 +130,12 @@ free_rsa:
 	return ret;
 }
 
-static int read_pem_private_key(const char *path, RSA **rsa)
+static int read_pem_private_key(const char *path, struct asymmetric_key *priv)
 {
 	EVP_PKEY *pkey;
 	BIO *bio = BIO_new(BIO_s_file());
 
-	*rsa = NULL;
+	priv->rsa = NULL;
 	if (!bio)
 		return -E_PRIVATE_KEY;
 	if (BIO_read_filename(bio, path) <= 0)
@@ -142,15 +143,15 @@ static int read_pem_private_key(const char *path, RSA **rsa)
 	pkey = PEM_read_bio_PrivateKey(bio, NULL, NULL, NULL);
 	if (!pkey)
 		goto bio_free;
-	*rsa = EVP_PKEY_get1_RSA(pkey);
+	priv->rsa = EVP_PKEY_get1_RSA(pkey);
 	EVP_PKEY_free(pkey);
 bio_free:
 	BIO_free(bio);
-	return *rsa? RSA_size(*rsa) : -E_PRIVATE_KEY;
+	return priv->rsa? RSA_size(priv->rsa) : -E_PRIVATE_KEY;
 }
 
 static int read_openssh_private_key(const unsigned char *blob,
-		const unsigned char *end, RSA **result)
+		const unsigned char *end, struct asymmetric_key *priv)
 {
 	int ret;
 	RSA *rsa;
@@ -196,7 +197,7 @@ static int read_openssh_private_key(const unsigned char *blob,
 	rsa->p = p;
 	rsa->q = q;
 #endif
-	*result = rsa;
+	priv->rsa = rsa;
 	return 1;
 free_p:
 	BN_clear_free(p);
@@ -213,13 +214,13 @@ free_rsa:
 	return ret;
 }
 
-static int get_private_key(const char *path, RSA **rsa)
+static int get_private_key(const char *path, struct asymmetric_key *priv)
 {
 	int ret;
 	unsigned char *blob, *end;
 	size_t blob_size;
 
-	*rsa = NULL;
+	priv->rsa = NULL;
 	ret = decode_private_key(path, &blob, &blob_size);
 	if (ret < 0)
 		return ret;
@@ -229,9 +230,9 @@ static int get_private_key(const char *path, RSA **rsa)
 		if (ret < 0)
 			goto free_blob;
 		PARA_INFO_LOG("reading RSA params at offset %d\n", ret);
-		ret = read_openssh_private_key(blob + ret, end, rsa);
+		ret = read_openssh_private_key(blob + ret, end, priv);
 	} else
-		ret = read_pem_private_key(path, rsa);
+		ret = read_pem_private_key(path, priv);
 free_blob:
 	free(blob);
 	return ret;
@@ -247,7 +248,7 @@ int apc_get_pubkey(const char *key_file, struct asymmetric_key **result)
 	ret = decode_public_key(key_file, &blob, &decoded_size);
 	if (ret < 0)
 		goto out;
-	ret = read_public_key(blob + ret, decoded_size - ret, &pub->rsa);
+	ret = read_public_key(blob + ret, decoded_size - ret, pub);
 	if (ret < 0)
 		goto free_blob;
 	ret = RSA_size(pub->rsa);
@@ -284,7 +285,7 @@ int apc_priv_decrypt(const char *key_file, unsigned char *outbuf,
 	if (inlen < 0)
 		return -E_RSA;
 	priv = alloc(sizeof(*priv));
-	ret = get_private_key(key_file, &priv->rsa);
+	ret = get_private_key(key_file, priv);
 	if (ret < 0) {
 		free(priv);
 		return ret;