subject:"\[OpenWrt\-Devel\] \[PATCH\] \[libubox\]\[v3\] b64\: add base64 support"

Re: [OpenWrt-Devel] [PATCH] [libubox][v3] b64: add base64 support

2015-04-14 Thread Jonas Gorski

Hi,

On Mon, Apr 13, 2015 at 2:34 AM, Luka Perkov  wrote:
> The base code has been taken from zstream project which was
> written by Steven Barth.
>
> Signed-off-by: Luka Perkov 
> CC: Steven Barth 
> ---
> => changes in v2:
>
> Use new API:
>
> size_t b64decode(void **out, const char *in, size_t len);
> size_t b64encode(char **out, const void *in, size_t len);
>
> => changes in v3:
>
> Use new API:
>
> static inline int b64_decode_size(const void *in, size_t len);
> static inline int b64_encode_size(size_t len);
>
> size_t b64decode(void *out, const void *in, size_t len);
> size_t b64encode(void *out, const void *in, size_t len);
>
> In this set a few corner cases of invalid writes in b64decode were fixed.
> Furthermore, b64decode() works fine when in == out.
>
>  CMakeLists.txt |   2 +-
>  b64.c  | 112 
> +
>  b64.h  |  60 +++
>  3 files changed, 173 insertions(+), 1 deletion(-)
>  create mode 100644 b64.c
>  create mode 100644 b64.h
>
> diff --git a/CMakeLists.txt b/CMakeLists.txt
> index 58381da..77f4842 100644
> --- a/CMakeLists.txt
> +++ b/CMakeLists.txt
> @@ -14,7 +14,7 @@ IF(JSONC_FOUND)
>INCLUDE_DIRECTORIES(${JSONC_INCLUDE_DIRS})
>  ENDIF()
>
> -SET(SOURCES avl.c avl-cmp.c blob.c blobmsg.c uloop.c usock.c ustream.c 
> ustream-fd.c vlist.c utils.c safe_list.c runqueue.c md5.c kvlist.c ulog.c)
> +SET(SOURCES avl.c avl-cmp.c blob.c blobmsg.c uloop.c usock.c ustream.c 
> ustream-fd.c vlist.c utils.c safe_list.c runqueue.c md5.c kvlist.c ulog.c 
> b64.c)
>
>  ADD_LIBRARY(ubox SHARED ${SOURCES})
>  ADD_LIBRARY(ubox-static STATIC ${SOURCES})
> diff --git a/b64.c b/b64.c
> new file mode 100644
> index 000..007fb91
> --- /dev/null
> +++ b/b64.c
> @@ -0,0 +1,112 @@
> +/*
> + * Copyright (C) 2011 Steven Barth 
> + * Copyright (C) 2015 Luka Perkov 
> + *
> + * Permission to use, copy, modify, and/or distribute this software for any
> + * purpose with or without fee is hereby granted, provided that the above
> + * copyright notice and this permission notice appear in all copies.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
> + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
> + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
> + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
> + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
> + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
> + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
> + */
> +
> +#include 
> +#include 
> +
> +#include "b64.h"
> +
> +static const uint8_t b64decode_tbl[] = {
> +   0x3e, 0xff, 0xff, 0xff, 0x3f, 0x34, 0x35, 0x36,
> +   0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0xff,
> +   0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00, 0x01,
> +   0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,
> +   0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11,
> +   0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19,
> +   0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1a, 0x1b,
> +   0x1c, 0x1d, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23,
> +   0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b,
> +   0x2c, 0x2d, 0x2e, 0x2f, 0x30, 0x31, 0x32, 0x33
> +};
> +
> +size_t b64decode(void *out, const void *in, size_t len)
> +{
> +   uint8_t *o = (uint8_t *) out;
> +   const uint8_t *data = (const uint8_t *) in;
> +   size_t lenout, i, j;
> +
> +   lenout = b64_decode_size(in, len);
> +   if (!lenout)
> +   return 0;
> +
> +   uint32_t cv = 0;
> +   for (i = 0; i < (len - 4); i += 4) {
> +   cv = 0;
> +   for (j = 0; j < 4; j++) {
> +   uint8_t c = data[i + j] - 43;
> +   if (c > 79 || (c = b64decode_tbl[c]) == 0xff)
> +   return 0;
> +
> +   cv |= c;
> +   if (j != 3)
> +   cv <<= 6;
> +   }
> +
> +   o[2] = (uint8_t)(cv & 0xff);
> +   o[1] = (uint8_t)((cv >> 8) & 0xff);
> +   o[0] = (uint8_t)((cv >> 16) & 0xff);
> +   o += 3;
> +   }
> +
> +   if (data[len - 1] != '=')
> +   o[2] = (uint8_t)(cv & 0xff);
> +
> +   if (data[len - 1] != '=')
> +   o[1] = (uint8_t)((cv >> 8) & 0xff);

You have the same condition twice, either you intended to have them
different and this is a bug or you can merge them.


Regards
Jonas
___
openwrt-devel mailing list
openwrt-devel@lists.openwrt.org
https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel

Re: [OpenWrt-Devel] [PATCH] [libubox][v3] b64: add base64 support

2015-04-14 Thread Felix Fietkau

On 2015-04-14 18:24, Luka Perkov wrote:
> Hi,
> 
> On Tue, Apr 14, 2015 at 06:00:32PM +0200, Felix Fietkau wrote:
>> >> + if (data[len - 1] == '=')
>> >> + ret--;
>> >> +
>> >> + if (data[len - 2] == '=')
>> >> + ret--;
>> > 
>> > the 2 if clauses look redundant and i guess you could solve it with a loop
> 
> Ok. I'll fix it.
> 
>> I'd prefer not passing in the input buffer here at all - a tiny
>> overestimation of the decode size doesn't hurt.
> 
> I don't think that is a good idea since we do not have NULL terminating
> output buffer in b64decode(). If you really want a function without
> input buffer we can make another one called:
> 
> static inline int b64_decode_size_approx(size_t len);
> 
> The overestimation is likely going to cause problems in cases like this:
> 
> buf = malloc(b64_decode_size(data, data_len));
> if (!buf)
>   return -1
> 
> buf_len = b64decode(rbuf, data, data_len);
> if (!buf_len)
>   return -1
> 
> write(fd, buf, buf_len);
> 
> In this case end of buf could be foobared and because of that extra
> bytes could be written.
As long as buf_len only returns the actual number of output bytes, I
don't see how overestimation is going to cause problems here.
Also, I think it would be nice to have a 0-terminated output. The extra
0-byte should be counted only in b64_decode_size and not in the result
of b64decode.
I think that will make the API harder to misuse, as calling C-string
functions on the result will be safe by default.

- Felix
___
openwrt-devel mailing list
openwrt-devel@lists.openwrt.org
https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel

Re: [OpenWrt-Devel] [PATCH] [libubox][v3] b64: add base64 support

2015-04-14 Thread Luka Perkov

Hi,

On Tue, Apr 14, 2015 at 06:00:32PM +0200, Felix Fietkau wrote:
> >> +  if (data[len - 1] == '=')
> >> +  ret--;
> >> +
> >> +  if (data[len - 2] == '=')
> >> +  ret--;
> > 
> > the 2 if clauses look redundant and i guess you could solve it with a loop

Ok. I'll fix it.

> I'd prefer not passing in the input buffer here at all - a tiny
> overestimation of the decode size doesn't hurt.

I don't think that is a good idea since we do not have NULL terminating
output buffer in b64decode(). If you really want a function without
input buffer we can make another one called:

static inline int b64_decode_size_approx(size_t len);

The overestimation is likely going to cause problems in cases like this:

buf = malloc(b64_decode_size(data, data_len));
if (!buf)
return -1

buf_len = b64decode(rbuf, data, data_len);
if (!buf_len)
return -1

write(fd, buf, buf_len);

In this case end of buf could be foobared and because of that extra
bytes could be written.

Luka
___
openwrt-devel mailing list
openwrt-devel@lists.openwrt.org
https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel

Re: [OpenWrt-Devel] [PATCH] [libubox][v3] b64: add base64 support

2015-04-14 Thread Felix Fietkau

On 2015-04-14 17:41, John Crispin wrote:
> hi
> 
> comments inline
> 
> On 13/04/2015 02:34, Luka Perkov wrote:
>> The base code has been taken from zstream project which was
>> written by Steven Barth.
>> 
>> Signed-off-by: Luka Perkov 
>> CC: Steven Barth 
>> ---
>> --- /dev/null
>> +++ b/b64.h
>> @@ -0,0 +1,60 @@
>> +/*
>> + * Copyright (C) 2011 Steven Barth 
>> + * Copyright (C) 2015 Luka Perkov 
>> + *
>> + * Permission to use, copy, modify, and/or distribute this software for any
>> + * purpose with or without fee is hereby granted, provided that the above
>> + * copyright notice and this permission notice appear in all copies.
>> + *
>> + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
>> + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
>> + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
>> + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
>> + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
>> + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
>> + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
>> + */
>> +
>> +#ifndef __LIBUBOX_B64_H
>> +#define __LIBUBOX_B64_H
>> +
>> +#include 
>> +
>> +static inline int b64_decode_size(const void *in, size_t len)
>> +{
>> +const uint8_t *data = (const uint8_t *) in;
>> +int ret;
>> +
>> +if ((len == 0) || (len % 4))
>> +return 0;
>> +
>> +ret = (len / 4) * 3;
>> +
>> +if (data[len - 1] == '=')
>> +ret--;
>> +
>> +if (data[len - 2] == '=')
>> +ret--;
> 
> the 2 if clauses look redundant and i guess you could solve it with a loop
I'd prefer not passing in the input buffer here at all - a tiny
overestimation of the decode size doesn't hurt.

- Felix
___
openwrt-devel mailing list
openwrt-devel@lists.openwrt.org
https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel

Re: [OpenWrt-Devel] [PATCH] [libubox][v3] b64: add base64 support

2015-04-14 Thread John Crispin

hi

comments inline

On 13/04/2015 02:34, Luka Perkov wrote:
> The base code has been taken from zstream project which was
> written by Steven Barth.
> 
> Signed-off-by: Luka Perkov 
> CC: Steven Barth 
> ---
> => changes in v2:
> 
> Use new API:
> 
> size_t b64decode(void **out, const char *in, size_t len);
> size_t b64encode(char **out, const void *in, size_t len);
> 
> => changes in v3:
> 
> Use new API:
> 
> static inline int b64_decode_size(const void *in, size_t len);
> static inline int b64_encode_size(size_t len);
> 
> size_t b64decode(void *out, const void *in, size_t len);
> size_t b64encode(void *out, const void *in, size_t len);
> 
> In this set a few corner cases of invalid writes in b64decode were fixed.
> Furthermore, b64decode() works fine when in == out.
> 
>  CMakeLists.txt |   2 +-
>  b64.c  | 112 
> +
>  b64.h  |  60 +++
>  3 files changed, 173 insertions(+), 1 deletion(-)
>  create mode 100644 b64.c
>  create mode 100644 b64.h
> 
> diff --git a/CMakeLists.txt b/CMakeLists.txt
> index 58381da..77f4842 100644
> --- a/CMakeLists.txt
> +++ b/CMakeLists.txt
> @@ -14,7 +14,7 @@ IF(JSONC_FOUND)
>INCLUDE_DIRECTORIES(${JSONC_INCLUDE_DIRS})
>  ENDIF()
>  
> -SET(SOURCES avl.c avl-cmp.c blob.c blobmsg.c uloop.c usock.c ustream.c 
> ustream-fd.c vlist.c utils.c safe_list.c runqueue.c md5.c kvlist.c ulog.c)
> +SET(SOURCES avl.c avl-cmp.c blob.c blobmsg.c uloop.c usock.c ustream.c 
> ustream-fd.c vlist.c utils.c safe_list.c runqueue.c md5.c kvlist.c ulog.c 
> b64.c)
>  
>  ADD_LIBRARY(ubox SHARED ${SOURCES})
>  ADD_LIBRARY(ubox-static STATIC ${SOURCES})
> diff --git a/b64.c b/b64.c
> new file mode 100644
> index 000..007fb91
> --- /dev/null
> +++ b/b64.c
> @@ -0,0 +1,112 @@
> +/*
> + * Copyright (C) 2011 Steven Barth 
> + * Copyright (C) 2015 Luka Perkov 
> + *
> + * Permission to use, copy, modify, and/or distribute this software for any
> + * purpose with or without fee is hereby granted, provided that the above
> + * copyright notice and this permission notice appear in all copies.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
> + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
> + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
> + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
> + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
> + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
> + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
> + */
> +
> +#include 
> +#include 
> +
> +#include "b64.h"
> +
> +static const uint8_t b64decode_tbl[] = {
> + 0x3e, 0xff, 0xff, 0xff, 0x3f, 0x34, 0x35, 0x36,
> + 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0xff,
> + 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00, 0x01,
> + 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,
> + 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11,
> + 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19,
> + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1a, 0x1b,
> + 0x1c, 0x1d, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23,
> + 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b,
> + 0x2c, 0x2d, 0x2e, 0x2f, 0x30, 0x31, 0x32, 0x33
> +};
> +
> +size_t b64decode(void *out, const void *in, size_t len)
> +{
> + uint8_t *o = (uint8_t *) out;
> + const uint8_t *data = (const uint8_t *) in;
> + size_t lenout, i, j;
> +
> + lenout = b64_decode_size(in, len);
> + if (!lenout)
> + return 0;
> +
> + uint32_t cv = 0;
> + for (i = 0; i < (len - 4); i += 4) {
> + cv = 0;
> + for (j = 0; j < 4; j++) {
> + uint8_t c = data[i + j] - 43;
> + if (c > 79 || (c = b64decode_tbl[c]) == 0xff)
> + return 0;
> +
> + cv |= c;
> + if (j != 3)
> + cv <<= 6;
> + }
> +
> + o[2] = (uint8_t)(cv & 0xff);
> + o[1] = (uint8_t)((cv >> 8) & 0xff);
> + o[0] = (uint8_t)((cv >> 16) & 0xff);
> + o += 3;
> + }
> +
> + if (data[len - 1] != '=')
> + o[2] = (uint8_t)(cv & 0xff);
> +
> + if (data[len - 1] != '=')
> + o[1] = (uint8_t)((cv >> 8) & 0xff);
> +
> + o[0] = (uint8_t)((cv >> 16) & 0xff);
> +
> + return lenout;
> +}
> +
> +static const uint8_t b64encode_tbl[] =
> + "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
> +
> +size_t b64encode(void *out, const void *in, size_t len)
> +{
> + uint8_t *o = (uint8_t *) out;
> + const uint8_t *data = (const uint8_t *) in;
> + size_t lenout, pad, i;
> +
> + lenout = b64_encode_size(len);
> + if (!lenout)
> + return 0;
> +
> + for (i = 0; i < len; i += 3) {
> + uint32_t cv = (data[i] << 16) | (d

[OpenWrt-Devel] [PATCH] [libubox][v3] b64: add base64 support

2015-04-12 Thread Luka Perkov

The base code has been taken from zstream project which was
written by Steven Barth.

Signed-off-by: Luka Perkov 
CC: Steven Barth 
---
=> changes in v2:

Use new API:

size_t b64decode(void **out, const char *in, size_t len);
size_t b64encode(char **out, const void *in, size_t len);

=> changes in v3:

Use new API:

static inline int b64_decode_size(const void *in, size_t len);
static inline int b64_encode_size(size_t len);

size_t b64decode(void *out, const void *in, size_t len);
size_t b64encode(void *out, const void *in, size_t len);

In this set a few corner cases of invalid writes in b64decode were fixed.
Furthermore, b64decode() works fine when in == out.

 CMakeLists.txt |   2 +-
 b64.c  | 112 +
 b64.h  |  60 +++
 3 files changed, 173 insertions(+), 1 deletion(-)
 create mode 100644 b64.c
 create mode 100644 b64.h

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 58381da..77f4842 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -14,7 +14,7 @@ IF(JSONC_FOUND)
   INCLUDE_DIRECTORIES(${JSONC_INCLUDE_DIRS})
 ENDIF()
 
-SET(SOURCES avl.c avl-cmp.c blob.c blobmsg.c uloop.c usock.c ustream.c 
ustream-fd.c vlist.c utils.c safe_list.c runqueue.c md5.c kvlist.c ulog.c)
+SET(SOURCES avl.c avl-cmp.c blob.c blobmsg.c uloop.c usock.c ustream.c 
ustream-fd.c vlist.c utils.c safe_list.c runqueue.c md5.c kvlist.c ulog.c b64.c)
 
 ADD_LIBRARY(ubox SHARED ${SOURCES})
 ADD_LIBRARY(ubox-static STATIC ${SOURCES})
diff --git a/b64.c b/b64.c
new file mode 100644
index 000..007fb91
--- /dev/null
+++ b/b64.c
@@ -0,0 +1,112 @@
+/*
+ * Copyright (C) 2011 Steven Barth 
+ * Copyright (C) 2015 Luka Perkov 
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include 
+#include 
+
+#include "b64.h"
+
+static const uint8_t b64decode_tbl[] = {
+   0x3e, 0xff, 0xff, 0xff, 0x3f, 0x34, 0x35, 0x36,
+   0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0xff,
+   0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00, 0x01,
+   0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,
+   0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11,
+   0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19,
+   0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1a, 0x1b,
+   0x1c, 0x1d, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23,
+   0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b,
+   0x2c, 0x2d, 0x2e, 0x2f, 0x30, 0x31, 0x32, 0x33
+};
+
+size_t b64decode(void *out, const void *in, size_t len)
+{
+   uint8_t *o = (uint8_t *) out;
+   const uint8_t *data = (const uint8_t *) in;
+   size_t lenout, i, j;
+
+   lenout = b64_decode_size(in, len);
+   if (!lenout)
+   return 0;
+
+   uint32_t cv = 0;
+   for (i = 0; i < (len - 4); i += 4) {
+   cv = 0;
+   for (j = 0; j < 4; j++) {
+   uint8_t c = data[i + j] - 43;
+   if (c > 79 || (c = b64decode_tbl[c]) == 0xff)
+   return 0;
+
+   cv |= c;
+   if (j != 3)
+   cv <<= 6;
+   }
+
+   o[2] = (uint8_t)(cv & 0xff);
+   o[1] = (uint8_t)((cv >> 8) & 0xff);
+   o[0] = (uint8_t)((cv >> 16) & 0xff);
+   o += 3;
+   }
+
+   if (data[len - 1] != '=')
+   o[2] = (uint8_t)(cv & 0xff);
+
+   if (data[len - 1] != '=')
+   o[1] = (uint8_t)((cv >> 8) & 0xff);
+
+   o[0] = (uint8_t)((cv >> 16) & 0xff);
+
+   return lenout;
+}
+
+static const uint8_t b64encode_tbl[] =
+   "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+size_t b64encode(void *out, const void *in, size_t len)
+{
+   uint8_t *o = (uint8_t *) out;
+   const uint8_t *data = (const uint8_t *) in;
+   size_t lenout, pad, i;
+
+   lenout = b64_encode_size(len);
+   if (!lenout)
+   return 0;
+
+   for (i = 0; i < len; i += 3) {
+   uint32_t cv = (data[i] << 16) | (data[i + 1] << 8) | data[i + 
2];
+   o[3] = b64encode_tbl[cv & 0x3f];
+   o[2] = b64encode_tbl[(cv >> 6) & 0x3f];
+   o[1] = b64encode_tbl[(cv >> 12) & 0x3f];
+   o[0] = b64encode_tbl[(cv >> 18) & 0x3f];
+

Re: [OpenWrt-Devel] [PATCH] [libubox][v3] b64: add base64 support

Re: [OpenWrt-Devel] [PATCH] [libubox][v3] b64: add base64 support

Re: [OpenWrt-Devel] [PATCH] [libubox][v3] b64: add base64 support

Re: [OpenWrt-Devel] [PATCH] [libubox][v3] b64: add base64 support

Re: [OpenWrt-Devel] [PATCH] [libubox][v3] b64: add base64 support

[OpenWrt-Devel] [PATCH] [libubox][v3] b64: add base64 support

6 matches

Site Navigation

Mail list logo

Footer information