From d74ec1dc86f4e0e9b3f677628ed136ca4139668c Mon Sep 17 00:00:00 2001
From: daurnimator <quae@daurnimator.com>
Date: Tue, 8 Nov 2016 15:38:46 +1100
Subject: openssl.pkey: Add pkey:decrypt() method
---
src/openssl.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 56 insertions(+)
(limited to 'src')
diff --git a/src/openssl.c b/src/openssl.c
index c0fc6de..85c7503 100644
--- a/src/openssl.c
+++ b/src/openssl.c
@@ -3181,6 +3181,61 @@ static int pk_setPrivateKey(lua_State *L) {
} /* pk_setPrivateKey() */
+static int pk_decrypt(lua_State *L) {
+ size_t outlen, inlen;
+ EVP_PKEY *key = checksimple(L, 1, PKEY_CLASS);
+ EVP_PKEY_CTX *ctx;
+ const char *str = luaL_checklstring(L, 2, &inlen);
+ BIO *bio;
+ BUF_MEM *buf;
+ int rsaPadding = RSA_PKCS1_PADDING; /* default for `openssl rsautl` */
+ int base_type = EVP_PKEY_base_id(key);
+
+ if (lua_istable(L, 3)) {
+ if (base_type == EVP_PKEY_RSA) {
+ lua_getfield(L, 3, "rsaPadding");
+ rsaPadding = luaL_optint(L, -1, rsaPadding);
+ lua_pop(L, 1);
+ }
+ }
+
+ bio = getbio(L);
+ BIO_get_mem_ptr(bio, &buf);
+
+ if (!(ctx = EVP_PKEY_CTX_new(key, NULL)))
+ goto sslerr;
+
+ if (EVP_PKEY_decrypt_init(ctx) <= 0)
+ goto sslerr;
+
+ if (base_type == EVP_PKEY_RSA && !EVP_PKEY_CTX_set_rsa_padding(ctx, rsaPadding))
+ goto sslerr;
+
+ if (EVP_PKEY_decrypt(ctx, NULL, &outlen, str, inlen) <= 0)
+ goto sslerr;
+
+ if (!BUF_MEM_grow_clean(buf, outlen))
+ goto sslerr;
+
+ if (EVP_PKEY_decrypt(ctx, buf->data, &outlen, str, inlen) <= 0)
+ goto sslerr;
+
+ EVP_PKEY_CTX_free(ctx);
+ ctx = NULL;
+
+ lua_pushlstring(L, buf->data, outlen);
+
+ return 1;
+sslerr:
+ if (ctx) {
+ EVP_PKEY_CTX_free(ctx);
+ ctx = NULL;
+ }
+
+ return auxL_error(L, auxL_EOPENSSL, "pkey:decrypt");
+} /* pk_decrypt() */
+
+
static int pk_encrypt(lua_State *L) {
size_t outlen, inlen;
EVP_PKEY *key = checksimple(L, 1, PKEY_CLASS);
@@ -3962,6 +4017,7 @@ static const auxL_Reg pk_methods[] = {
{ "type", &pk_type },
{ "setPublicKey", &pk_setPublicKey },
{ "setPrivateKey", &pk_setPrivateKey },
+ { "decrypt", &pk_decrypt },
{ "encrypt", &pk_encrypt },
{ "sign", &pk_sign },
{ "verify", &pk_verify },
--
cgit v1.2.3-59-g8ed1b