feat: add gmssl headers

include/gmssl/base64.h

@@ -0,0 +1,72 @@
+/*
+ *  Copyright 2014-2022 The GmSSL Project. All Rights Reserved.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the License); you may
+ *  not use this file except in compliance with the License.
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ */
+
+
+
+#ifndef GMSSL_BASE64_H
+#define GMSSL_BASE64_H
+
+#include <stdint.h>
+#include <stdlib.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+BASE64 Public API
+
+	BASE64_CTX
+	base64_encode_init
+	base64_encode_update
+	base64_encode_finish
+	base64_decode_init
+	base64_decode_update
+	base64_decode_finish
+
+*/
+
+
+typedef struct {
+    /* number saved in a partial encode/decode */
+    int num;
+    /*
+     * The length is either the output line length (in input bytes) or the
+     * shortest input line length that is ok.  Once decoding begins, the
+     * length is adjusted up each time a longer line is decoded
+     */
+    int length;
+    /* data to encode */
+    unsigned char enc_data[80];
+    /* number read on current line */
+    int line_num;
+    int expect_nl;
+} BASE64_CTX;
+
+# define BASE64_ENCODE_LENGTH(l)    (((l+2)/3*4)+(l/48+1)*2+80)
+# define BASE64_DECODE_LENGTH(l)    ((l+3)/4*3+80)
+
+
+void base64_encode_init(BASE64_CTX *ctx);
+int  base64_encode_update(BASE64_CTX *ctx, const uint8_t *in, int inlen, uint8_t *out, int *outlen);
+void base64_encode_finish(BASE64_CTX *ctx, uint8_t *out, int *outlen);
+
+void base64_decode_init(BASE64_CTX *ctx);
+int  base64_decode_update(BASE64_CTX *ctx, const uint8_t *in, int inlen, uint8_t *out, int *outlen);
+int  base64_decode_finish(BASE64_CTX *ctx, uint8_t *out, int *outlen);
+
+
+int base64_encode_block(unsigned char *t, const unsigned char *f, int dlen);
+int base64_decode_block(unsigned char *t, const unsigned char *f, int n);
+
+
+#ifdef __cplusplus
+}
+#endif
+#endif