Update base64 lib to latest version

* be as close as possible to the original code (except for extra
   src/b64/utils sub-directory)
 * use new base64_encode_no_lf() function with no line returns
 * fix irc_server_sasl_authenticate(): add missing free(raw_str)
 * add a lastsync status file in src/b64 for tracking

Signed-off-by: Loïc Gomez <bip@animanova.fr>

AUTHORS

@@ -10,4 +10,6 @@ Thanks to our marketting and management team:
 ack|, ato, blackmore, lafouine, Gaston & gromit 
 
 Crypto shamelessly stolen from Christophe 'sexy' Devine.
-Credits to Jouni Malinen for base64 library (http://web.mit.edu/freebsd/head/contrib/wpa/src/utils/)
+
+Credits to Jouni Malinen for base64 library:
+Source: http://w1.fi/cgit/hostap/commit/src/utils/base64.c

src/b64/base64.c

@@ -1,32 +1,28 @@
 /*
  * Base64 encoding/decoding (RFC1341)
  * Copyright (c) 2005-2019, Jouni Malinen <j@w1.fi>
- * Copyright (c) 2022 Loïc Gomez
- *
- * Source: http://w1.fi/cgit/hostap/commit/src/utils/base64.c
- * Last synchronization date: 2022-03-18
- * (c7e6dbdad8ee043a9d7f856502196dbeb65cb4ac hostap commit was then used)
  *
  * This software may be distributed under the terms of the BSD license.
  * See README for more details.
  */
 
-#include <stddef.h>
+#include "includes.h"
 #include <stdint.h>
-#include <stdlib.h>
-#include <string.h>
+
+#include "common.h"
+#include "os.h"
 #include "base64.h"
 
 static const char base64_table[65] =
 	"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
 
 
-#define BASE64_PAD 1
-#define BASE64_LF 2
+#define BASE64_PAD BIT(0)
+#define BASE64_LF BIT(1)
 
 
-static char *base64_gen_encode(const unsigned char *src, size_t len,
-			       size_t *out_len, const char *table, int add_pad)
+static char * base64_gen_encode(const unsigned char *src, size_t len,
+				size_t *out_len, const char *table, int add_pad)
 {
 	char *out, *pos;
 	const unsigned char *end, *in;
@@ -38,10 +34,10 @@ static char *base64_gen_encode(const unsigned char *src, size_t len,
 	olen = len * 4 / 3 + 4; /* 3-byte blocks to 4-byte */
 	if (add_pad & BASE64_LF)
 		olen += olen / 72; /* line feeds */
-	olen++;			   /* nul termination */
+	olen++; /* nul termination */
 	if (olen < len)
 		return NULL; /* integer overflow */
-	out = malloc(olen);
+	out = os_malloc(olen);
 	if (out == NULL)
 		return NULL;
 
@@ -69,8 +65,8 @@ static char *base64_gen_encode(const unsigned char *src, size_t len,
 			if (add_pad & BASE64_PAD)
 				*pos++ = '=';
 		} else {
-			*pos++ = table[(((in[0] & 0x03) << 4) | (in[1] >> 4))
-				       & 0x3f];
+			*pos++ = table[(((in[0] & 0x03) << 4) |
+					(in[1] >> 4)) & 0x3f];
 			*pos++ = table[((in[1] & 0x0f) << 2) & 0x3f];
 		}
 		if (add_pad & BASE64_PAD)
@@ -87,8 +83,9 @@ static char *base64_gen_encode(const unsigned char *src, size_t len,
 	return out;
 }
 
+
 /**
- * base64_encode - Base64 encode without line feeds
+ * 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
@@ -99,7 +96,7 @@ static char *base64_gen_encode(const unsigned char *src, size_t len,
  * nul terminated to make it easier to use as a C string. The nul terminator is
  * not included in out_len.
  */
-char *base64_encode(const void *src, size_t len, size_t *out_len)
+char * base64_encode_no_lf(const void *src, size_t len, size_t *out_len)
 {
 	return base64_gen_encode(src, len, out_len, base64_table, BASE64_PAD);
 }

src/b64/base64.h

@@ -1,7 +1,6 @@
 /*
  * Base64 encoding/decoding (RFC1341)
  * Copyright (c) 2005, Jouni Malinen <j@w1.fi>
- * Copyright (c) 2022 Loïc Gomez
  *
  * This software may be distributed under the terms of the BSD license.
  * See README for more details.
@@ -10,6 +9,6 @@
 #ifndef BASE64_H
 #define BASE64_H
 
-char *base64_encode(const void *src, size_t len, size_t *out_len);
+char * base64_encode_no_lf(const void *src, size_t len, size_t *out_len);
 
 #endif /* BASE64_H */

src/b64/base64.lastsync

@@ -0,0 +1,7 @@
+Last sync for base64 lib:
+- by: Kyoshiro on 2024-02-19
+- url: http://w1.fi/cgit/hostap/commit/src/utils/base64.c
+- commit-id: c7e6dbdad8ee043a9d7f856502196dbeb65cb4ac
+- commit-date: Mon Jun 15 20:18:12 2020 +0300
+- base64.h: d545b2931ca2206a265226049d90882a527236f0
+- base64.c: 0d121c1989cac9349949b2cd3611f49a1ef2820f

src/b64/common.h

@@ -0,0 +1,3 @@
+#ifndef BIT
+#define BIT(x) (int)(1U << (x))
+#endif

src/b64/includes.h

@@ -0,0 +1,4 @@
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>

src/b64/os.h

@@ -0,0 +1,3 @@
+#ifndef os_malloc
+#define os_malloc(s) malloc((s))
+#endif

src/irc.c

@@ -2190,7 +2190,8 @@ static int irc_server_sasl_authenticate(struct link_server *ircs)
 	memcpy(raw_str + u_len + 1, sasl_username, u_len);
 	raw_str[u_len * 2 + 1] = '\0';
 	memcpy(raw_str + u_len * 2 + 2, sasl_password, p_len);
-	enc_str = base64_encode(raw_str, raw_len, &enc_len);
+	enc_str = base64_encode_no_lf(raw_str, raw_len, &enc_len);
+	free(raw_str);
 	mylog(LOG_DEBUG, "[%s] Base64 encoded SASL auth token (len %d): %s",
 	      LINK(ircs)->name, enc_len, enc_str);