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authorFox Caminiti <fox@foxcam.net>2022-11-17 23:56:43 -0500
committerFox Caminiti <fox@foxcam.net>2022-11-17 23:56:43 -0500
commitbb4d634962cdf97affd041a81b12c3d2c8d46bf7 (patch)
tree292836d9377cd1e419811c4e0d1ef95bb2c1f43c /lib
parentc27530c79fd135c499a52b222e9cec16aa1951ad (diff)
clipboard, simd, sd experiments
Diffstat (limited to 'lib')
-rw-r--r--lib/base64.c189
-rw-r--r--lib/base64.h17
2 files changed, 206 insertions, 0 deletions
diff --git a/lib/base64.c b/lib/base64.c
new file mode 100644
index 0000000..1e7e192
--- /dev/null
+++ b/lib/base64.c
@@ -0,0 +1,189 @@
+/*
+The compilation of software known as FreeBSD is distributed under the
+following terms:
+
+Copyright (c) 1992-2014 The FreeBSD Project. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+1. Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in the
+ documentation and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGE.
+*/
+
+/*
+ * Base64 encoding/decoding (RFC1341)
+ * Copyright (c) 2005-2011, Jouni Malinen <j@w1.fi>
+ *
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
+ */
+
+#include "base64.h"
+
+static const unsigned char base64_table[65] =
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+/**
+ * base64_encode - Base64 encode
+ * @src: Data to be encoded
+ * @len: Length of the data to be encoded
+ * @out_len: Pointer to output length variable, or %NULL if not used
+ * Returns: Allocated buffer of out_len bytes of encoded data,
+ * or %NULL on failure
+ *
+ * Caller is responsible for freeing the returned buffer. Returned buffer is
+ * nul terminated to make it easier to use as a C string. The nul terminator is
+ * not included in out_len.
+ */
+
+size_t base64_encode_size(size_t len)
+{
+ size_t olen;
+ olen = len * 4 / 3 + 4; /* 3-byte blocks to 4-byte */
+ olen += olen / 72; /* line feeds */
+ olen++; /* nul termination */
+ Assert(olen >= len);
+ return olen;
+}
+
+void base64_encode(const unsigned char *src, size_t len,
+ unsigned char *out, size_t *out_len)
+{
+ unsigned char *pos;
+ const unsigned char *end, *in;
+ int line_len;
+
+ Assert(out != NULL)
+
+ end = src + len;
+ in = src;
+ pos = out;
+ line_len = 0;
+ while (end - in >= 3) {
+ *pos++ = base64_table[in[0] >> 2];
+ *pos++ = base64_table[((in[0] & 0x03) << 4) | (in[1] >> 4)];
+ *pos++ = base64_table[((in[1] & 0x0f) << 2) | (in[2] >> 6)];
+ *pos++ = base64_table[in[2] & 0x3f];
+ in += 3;
+ line_len += 4;
+ if (line_len >= 72) {
+ *pos++ = '\n';
+ line_len = 0;
+ }
+ }
+
+ if (end - in) {
+ *pos++ = base64_table[in[0] >> 2];
+ if (end - in == 1) {
+ *pos++ = base64_table[(in[0] & 0x03) << 4];
+ *pos++ = '=';
+ } else {
+ *pos++ = base64_table[((in[0] & 0x03) << 4) |
+ (in[1] >> 4)];
+ *pos++ = base64_table[(in[1] & 0x0f) << 2];
+ }
+ *pos++ = '=';
+ line_len += 4;
+ }
+
+ if (line_len)
+ *pos++ = '\n';
+
+ *pos = '\0';
+ if (out_len)
+ *out_len = pos - out;
+}
+
+
+/**
+ * base64_decode - Base64 decode
+ * @src: Data to be decoded
+ * @len: Length of the data to be decoded
+ * @out_len: Pointer to output length variable
+ * Returns: Allocated buffer of out_len bytes of decoded data,
+ * or %NULL on failure
+ *
+ * Caller is responsible for freeing the returned buffer.
+ */
+unsigned char * base64_decode(const unsigned char *src, size_t len,
+ size_t *out_len)
+{
+ unsigned char dtable[256], *out, *pos, block[4], tmp;
+ size_t i, count, olen;
+ int pad = 0;
+
+ // paranoid
+ // os_memset(dtable, 0x80, 256);
+ for (i = 0; i < 256; i++) {
+ dtable[i] = 0x80;
+ }
+
+ for (i = 0; i < sizeof(base64_table) - 1; i++)
+ dtable[base64_table[i]] = (unsigned char) i;
+ dtable[(int)'='] = 0;
+
+ count = 0;
+ for (i = 0; i < len; i++) {
+ if (dtable[src[i]] != 0x80)
+ count++;
+ }
+
+ if (count == 0 || count % 4)
+ return NULL;
+
+ olen = count / 4 * 3;
+ // pos = out = os_malloc(olen);
+ pos = out = NULL;
+ Assert(0);
+ if (out == NULL)
+ return NULL;
+
+ count = 0;
+ for (i = 0; i < len; i++) {
+ tmp = dtable[src[i]];
+ if (tmp == 0x80)
+ continue;
+
+ if (src[i] == '=')
+ pad++;
+ block[count] = tmp;
+ count++;
+ if (count == 4) {
+ *pos++ = (block[0] << 2) | (block[1] >> 4);
+ *pos++ = (block[1] << 4) | (block[2] >> 2);
+ *pos++ = (block[2] << 6) | block[3];
+ count = 0;
+ if (pad) {
+ if (pad == 1)
+ pos--;
+ else if (pad == 2)
+ pos -= 2;
+ else {
+ /* Invalid padding */
+ return NULL;
+ }
+ break;
+ }
+ }
+ }
+
+ *out_len = pos - out;
+ return out;
+}
+
diff --git a/lib/base64.h b/lib/base64.h
new file mode 100644
index 0000000..aa21fd0
--- /dev/null
+++ b/lib/base64.h
@@ -0,0 +1,17 @@
+/*
+ * Base64 encoding/decoding (RFC1341)
+ * Copyright (c) 2005, Jouni Malinen <j@w1.fi>
+ *
+ * This software may be distributed under the terms of the BSD license.
+ * See README for more details.
+ */
+
+#ifndef BASE64_H
+#define BASE64_H
+
+unsigned char * base64_encode(const unsigned char *src, size_t len,
+ size_t *out_len);
+unsigned char * base64_decode(const unsigned char *src, size_t len,
+ size_t *out_len);
+
+#endif /* BASE64_H */