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"Bernhard Rosenkraenzer <b...@baylibre.com>" just uploaded a new patch set to
Gerrit, which you can find at https://review.openocd.org/c/openocd/+/8895
-- gerrit
commit 7cdd566109499fedd5442cf1c586ac813213d688
Author: Bernhard Rosenkränzer <b...@baylibre.com>
Date: Tue May 6 01:07:06 2025 +0200
Add base64 encoding/decoding helpers from FreeBSD
These helpers are needed by the updated RISC-V target files.
Change-Id: I5aa9f4e58eb75e1c7a1e8e0e3961725e2a915ebb
Signed-off-by: Bernhard Rosenkränzer <b...@baylibre.com>
diff --git a/src/helper/Makefile.am b/src/helper/Makefile.am
index e0fa331ea2..e69ca7aa21 100644
--- a/src/helper/Makefile.am
+++ b/src/helper/Makefile.am
@@ -3,6 +3,7 @@
noinst_LTLIBRARIES += %D%/libhelper.la
%C%_libhelper_la_SOURCES = \
+ %D%/base64.c \
%D%/binarybuffer.c \
%D%/options.c \
%D%/time_support_common.c \
@@ -18,6 +19,7 @@ noinst_LTLIBRARIES += %D%/libhelper.la
%D%/jim-nvp.c \
%D%/nvp.c \
%D%/align.h \
+ %D%/base64.h \
%D%/binarybuffer.h \
%D%/bits.h \
%D%/configuration.h \
diff --git a/src/helper/base64.c b/src/helper/base64.c
new file mode 100644
index 0000000000..5e0ee0846e
--- /dev/null
+++ b/src/helper/base64.c
@@ -0,0 +1,160 @@
+// SPDX-License-Identifier: BSD-3-Clause
+
+/*
+ * Base64 encoding/decoding (RFC1341)
+ * Copyright (c) 2005-2011, Jouni Malinen <j...@w1.fi>
+ *
+ * Original file from FreeBSD code
+ *
https://cgit.freebsd.org/src/tree/contrib/wpa/src/utils/base64.c?id=f05cddf940db
+ */
+
+
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+
+#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.
+ */
+unsigned char *base64_encode(const unsigned char *src, size_t len,
+ size_t *out_len)
+{
+ unsigned char *out, *pos;
+ const unsigned char *end, *in;
+ size_t olen;
+ int line_len;
+
+ olen = len * 4 / 3 + 4; /* 3-byte blocks to 4-byte */
+ olen += olen / 72; /* line feeds */
+ olen++; /* nul termination */
+ if (olen < len)
+ return NULL; /* integer overflow */
+ out = malloc(olen);
+ if (!out)
+ return 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;
+ return 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;
+
+ memset(dtable, 0x80, 256);
+ for (i = 0; i < sizeof(base64_table) - 1; i++)
+ dtable[base64_table[i]] = (unsigned char)i;
+ dtable['='] = 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;
+ out = malloc(olen);
+ if (!out)
+ return NULL;
+ pos = out;
+
+ 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 */
+ free(out);
+ return NULL;
+ }
+ break;
+ }
+ }
+ }
+
+ *out_len = pos - out;
+ return out;
+}
diff --git a/src/helper/base64.h b/src/helper/base64.h
new file mode 100644
index 0000000000..77515fda00
--- /dev/null
+++ b/src/helper/base64.h
@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: BSD-3-Clause
+
+/*
+ * Base64 encoding/decoding (RFC1341)
+ * Copyright (c) 2005, Jouni Malinen <j...@w1.fi>
+ *
+ * Original file from FreeBSD code
+ *
https://cgit.freebsd.org/src/tree/contrib/wpa/src/utils/base64.h?id=f05cddf940db
+ */
+
+#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 */
--
