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authorAlberto Gonzalez Iniesta <agi@inittab.org>2016-12-27 18:25:47 +0100
committerAlberto Gonzalez Iniesta <agi@inittab.org>2016-12-27 18:25:47 +0100
commit3a2bbdb05ca6a6996e424c9fb225cb0d53804125 (patch)
treef29063da5bec4caf3853d49a22a09c8619eebd21 /src/openvpn/base64.c
parentd53dba59e78da865c4fe820386ff2f4f76925f3b (diff)
New upstream version 2.4.0upstream/2.4.0
Diffstat (limited to 'src/openvpn/base64.c')
-rw-r--r--src/openvpn/base64.c144
1 files changed, 89 insertions, 55 deletions
diff --git a/src/openvpn/base64.c b/src/openvpn/base64.c
index 258b258..c799ede 100644
--- a/src/openvpn/base64.c
+++ b/src/openvpn/base64.c
@@ -43,14 +43,14 @@
#include "memdbg.h"
-static char base64_chars[] =
+static char base64_chars[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
/*
* base64 encode input data of length size to malloced
* buffer which is returned as *str. Returns string
* length of *str.
*/
-int
+int
openvpn_base64_encode(const void *data, int size, char **str)
{
char *s, *p;
@@ -59,44 +59,58 @@ openvpn_base64_encode(const void *data, int size, char **str)
const unsigned char *q;
if (size < 0)
- return -1;
+ {
+ return -1;
+ }
p = s = (char *) malloc(size * 4 / 3 + 4);
if (p == NULL)
- return -1;
+ {
+ return -1;
+ }
q = (const unsigned char *) data;
i = 0;
- for (i = 0; i < size;) {
- c = q[i++];
- c *= 256;
- if (i < size)
- c += q[i];
- i++;
- c *= 256;
- if (i < size)
- c += q[i];
- i++;
- p[0] = base64_chars[(c & 0x00fc0000) >> 18];
- p[1] = base64_chars[(c & 0x0003f000) >> 12];
- p[2] = base64_chars[(c & 0x00000fc0) >> 6];
- p[3] = base64_chars[(c & 0x0000003f) >> 0];
- if (i > size)
- p[3] = '=';
- if (i > size + 1)
- p[2] = '=';
- p += 4;
+ for (i = 0; i < size; ) {
+ c = q[i++];
+ c *= 256;
+ if (i < size)
+ {
+ c += q[i];
+ }
+ i++;
+ c *= 256;
+ if (i < size)
+ {
+ c += q[i];
+ }
+ i++;
+ p[0] = base64_chars[(c & 0x00fc0000) >> 18];
+ p[1] = base64_chars[(c & 0x0003f000) >> 12];
+ p[2] = base64_chars[(c & 0x00000fc0) >> 6];
+ p[3] = base64_chars[(c & 0x0000003f) >> 0];
+ if (i > size)
+ {
+ p[3] = '=';
+ }
+ if (i > size + 1)
+ {
+ p[2] = '=';
+ }
+ p += 4;
}
*p = 0;
*str = s;
return strlen(s);
}
-static int
+static int
pos(char c)
{
char *p;
for (p = base64_chars; *p; p++)
- if (*p == c)
- return p - base64_chars;
+ if (*p == c)
+ {
+ return p - base64_chars;
+ }
return -1;
}
@@ -109,18 +123,28 @@ token_decode(const char *token)
unsigned int val = 0;
int marker = 0;
if (!token[0] || !token[1] || !token[2] || !token[3])
- return DECODE_ERROR;
+ {
+ return DECODE_ERROR;
+ }
for (i = 0; i < 4; i++) {
- val *= 64;
- if (token[i] == '=')
- marker++;
- else if (marker > 0)
- return DECODE_ERROR;
- else
- val += pos(token[i]);
+ val *= 64;
+ if (token[i] == '=')
+ {
+ marker++;
+ }
+ else if (marker > 0)
+ {
+ return DECODE_ERROR;
+ }
+ else
+ {
+ val += pos(token[i]);
+ }
}
if (marker > 2)
- return DECODE_ERROR;
+ {
+ return DECODE_ERROR;
+ }
return (marker << 24) | val;
}
/*
@@ -137,27 +161,37 @@ openvpn_base64_decode(const char *str, void *data, int size)
q = data;
if (size >= 0)
- e = q + size;
+ {
+ e = q + size;
+ }
for (p = str; *p && (*p == '=' || strchr(base64_chars, *p)); p += 4) {
- unsigned int val = token_decode(p);
- unsigned int marker = (val >> 24) & 0xff;
- if (val == DECODE_ERROR)
- return -1;
- if (e && q >= e)
- return -1;
- *q++ = (val >> 16) & 0xff;
- if (marker < 2)
- {
- if (e && q >= e)
- return -1;
- *q++ = (val >> 8) & 0xff;
- }
- if (marker < 1)
- {
- if (e && q >= e)
- return -1;
- *q++ = val & 0xff;
- }
+ unsigned int val = token_decode(p);
+ unsigned int marker = (val >> 24) & 0xff;
+ if (val == DECODE_ERROR)
+ {
+ return -1;
+ }
+ if (e && q >= e)
+ {
+ return -1;
+ }
+ *q++ = (val >> 16) & 0xff;
+ if (marker < 2)
+ {
+ if (e && q >= e)
+ {
+ return -1;
+ }
+ *q++ = (val >> 8) & 0xff;
+ }
+ if (marker < 1)
+ {
+ if (e && q >= e)
+ {
+ return -1;
+ }
+ *q++ = val & 0xff;
+ }
}
return q - (unsigned char *) data;
}