1 files changed, 116 insertions, 0 deletions
diff --git a/package/utils/uencrypt/src/uencrypt-openssl.c b/package/utils/uencrypt/src/uencrypt-openssl.c
new file mode 100644
index 00000000000..d9182be2bae
--- /dev/null
+++ b/package/utils/uencrypt/src/uencrypt-openssl.c
@@ -0,0 +1,116 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later
+ * Copyright (C) 2022-2023 Eneas Ulir de Queiroz
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include "uencrypt.h"
+
+const cipher_t *get_default_cipher(void)
+{
+    return EVP_aes_128_cbc();
+}
+
+#ifndef USE_WOLFSSL
+static void print_ciphers(const OBJ_NAME *name,void *arg) {
+    fprintf(arg, "\t%s\n", name->name);
+}
+#endif
+
+const cipher_t *get_cipher_or_print_error(char *name)
+{
+    const EVP_CIPHER *cipher;
+
+    if ((cipher = EVP_get_cipherbyname(name)))
+	return cipher;
+
+    fprintf(stderr, "Error: invalid cipher: %s.\n", name);
+#ifndef USE_WOLFSSL
+    fprintf(stderr, "Supported ciphers: \n");
+    OBJ_NAME_do_all_sorted(OBJ_NAME_TYPE_CIPHER_METH, print_ciphers, stderr);
+#endif
+    return NULL;
+}
+
+int get_cipher_ivsize(const cipher_t *cipher)
+{
+    return EVP_CIPHER_iv_length(cipher);
+}
+
+int get_cipher_keysize(const cipher_t *cipher)
+{
+    return EVP_CIPHER_key_length(cipher);
+}
+
+ctx_t *create_ctx(const cipher_t *cipher, const unsigned char *key,
+		  const unsigned char *iv, int enc, int padding)
+{
+    EVP_CIPHER_CTX *ctx;
+    int ret;
+
+    ctx = EVP_CIPHER_CTX_new();
+    if (!ctx) {
+	fprintf (stderr, "Error: create_ctx: out of memory.\n");
+	return NULL;
+    }
+    ret = EVP_CipherInit_ex(ctx, cipher, NULL, key, iv, enc);
+    if (!ret) {
+	fprintf(stderr, "Error:EVP_CipherInit_ex: %d\n", ret);
+	goto abort;
+    }
+    ret = EVP_CIPHER_CTX_set_padding(ctx, padding);
+    if (!ret) {
+	fprintf(stderr, "Error:EVP_CIPHER_CTX_set_padding: %d\n", ret);
+	goto abort;
+    }
+
+    return ctx;
+
+abort:
+    free_ctx(ctx);
+    return NULL;
+}
+
+
+int do_crypt(FILE *infile, FILE *outfile, ctx_t *ctx)
+{
+    unsigned char inbuf[CRYPT_BUF_SIZE];
+    unsigned char outbuf[CRYPT_BUF_SIZE + EVP_MAX_BLOCK_LENGTH];
+    int inlen, outlen;
+    int ret;
+
+    for (;;) {
+	inlen = fread(inbuf, 1, CRYPT_BUF_SIZE, infile);
+	if (inlen <= 0)
+	    break;
+	ret = EVP_CipherUpdate(ctx, outbuf, &outlen, inbuf, inlen);
+	if (!ret) {
+	    fprintf(stderr, "Error: EVP_CipherUpdate: %d\n", ret);
+	    return ret;
+	}
+	ret = fwrite(outbuf, 1, outlen, outfile);
+	if (ret != outlen) {
+	    fprintf(stderr, "Error: CipherUpdate short write.\n");
+	    return ret - outlen;
+	}
+    }
+    ret = EVP_CipherFinal_ex(ctx, outbuf, &outlen);
+    if (!ret) {
+	fprintf(stderr, "Error: EVP_CipherFinal: %d\n", ret);
+	return ret;
+    }
+    ret = fwrite(outbuf, 1, outlen, outfile);
+    if (ret != outlen) {
+	fprintf(stderr, "Error: CipherFinal short write.\n");
+	return ret - outlen;
+    }
+
+    return 0;
+}
+
+void free_ctx(ctx_t *ctx)
+{
+    EVP_CIPHER_CTX_free(ctx);
+}