ReactOS 0.4.15-dev-8419-g7f0e8a3
base64_codec.c File Reference
#include "precomp.h"
#include <wine/debug.h>
Include dependency graph for base64_codec.c:

Go to the source code of this file.

Functions

 WINE_DEFAULT_DEBUG_CHANNEL (ntlm)
 
SECURITY_STATUS encodeBase64 (PBYTE in_buf, int in_len, char *out_buf, int max_len, int *out_len)
 
static BYTE decode (char c)
 
SECURITY_STATUS decodeBase64 (char *in_buf, int in_len, PBYTE out_buf, int max_len, int *out_len)
 

Variables

static const char b64 []
 

Function Documentation

◆ decode()

static BYTE decode ( char  c)
inlinestatic

Definition at line 97 of file base64_codec.c.

98{
99 if( c >= 'A' && c <= 'Z')
100 return c - 'A';
101 if( c >= 'a' && c <= 'z')
102 return c - 'a' + 26;
103 if( c >= '0' && c <= '9')
104 return c - '0' + 52;
105 if( c == '+')
106 return 62;
107 if( c == '/')
108 return 63;
109 else
110 return 64;
111}
const GLubyte * c
Definition: glext.h:8905

Referenced by CRYPT_AsnDecodeChoiceOfTimeInternal(), and decodeBase64().

◆ decodeBase64()

SECURITY_STATUS decodeBase64 ( char in_buf,
int  in_len,
PBYTE  out_buf,
int  max_len,
int out_len 
)

Definition at line 113 of file base64_codec.c.

115{
116 int len = in_len, i;
117 char *d = in_buf;
118 int ip0, ip1, ip2, ip3;
119
120 TRACE("in_len: %d\n", in_len);
121
122 if((in_len % 4) != 0)
123 return SEC_E_INVALID_TOKEN;
124
125 if(in_len > max_len)
127
128 i = 0;
129 while(len > 4)
130 {
131 if((ip0 = decode(d[0])) > 63)
132 return SEC_E_INVALID_TOKEN;
133 if((ip1 = decode(d[1])) > 63)
134 return SEC_E_INVALID_TOKEN;
135 if((ip2 = decode(d[2])) > 63)
136 return SEC_E_INVALID_TOKEN;
137 if((ip3 = decode(d[3])) > 63)
138 return SEC_E_INVALID_TOKEN;
139
140 out_buf[i + 0] = (ip0 << 2) | (ip1 >> 4);
141 out_buf[i + 1] = (ip1 << 4) | (ip2 >> 2);
142 out_buf[i + 2] = (ip2 << 6) | ip3;
143 len -= 4;
144 i += 3;
145 d += 4;
146 }
147
148 if(d[2] == '=')
149 {
150 if((ip0 = decode(d[0])) > 63)
151 return SEC_E_INVALID_TOKEN;
152 if((ip1 = decode(d[1])) > 63)
153 return SEC_E_INVALID_TOKEN;
154
155 out_buf[i] = (ip0 << 2) | (ip1 >> 4);
156 i++;
157 }
158 else if(d[3] == '=')
159 {
160 if((ip0 = decode(d[0])) > 63)
161 return SEC_E_INVALID_TOKEN;
162 if((ip1 = decode(d[1])) > 63)
163 return SEC_E_INVALID_TOKEN;
164 if((ip2 = decode(d[2])) > 63)
165 return SEC_E_INVALID_TOKEN;
166
167 out_buf[i + 0] = (ip0 << 2) | (ip1 >> 4);
168 out_buf[i + 1] = (ip1 << 4) | (ip2 >> 2);
169 i += 2;
170 }
171 else
172 {
173 if((ip0 = decode(d[0])) > 63)
174 return SEC_E_INVALID_TOKEN;
175 if((ip1 = decode(d[1])) > 63)
176 return SEC_E_INVALID_TOKEN;
177 if((ip2 = decode(d[2])) > 63)
178 return SEC_E_INVALID_TOKEN;
179 if((ip3 = decode(d[3])) > 63)
180 return SEC_E_INVALID_TOKEN;
181
182
183 out_buf[i + 0] = (ip0 << 2) | (ip1 >> 4);
184 out_buf[i + 1] = (ip1 << 4) | (ip2 >> 2);
185 out_buf[i + 2] = (ip2 << 6) | ip3;
186 i += 3;
187 }
188 *out_len = i;
189 return SEC_E_OK;
190}
static BYTE decode(char c)
Definition: base64_codec.c:97
GLenum GLsizei len
Definition: glext.h:6722
GLsizei GLenum const GLvoid GLsizei GLenum GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLint GLint GLint GLshort GLshort GLshort GLubyte GLubyte GLubyte GLuint GLuint GLuint GLushort GLushort GLushort GLbyte GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLfloat GLint GLint GLint GLint GLshort GLshort GLshort GLshort GLubyte GLubyte GLubyte GLubyte GLuint GLuint GLuint GLuint GLushort GLushort GLushort GLushort GLboolean const GLdouble const GLfloat const GLint const GLshort const GLbyte const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLdouble const GLfloat const GLfloat const GLint const GLint const GLshort const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort GLenum GLenum GLenum GLfloat GLenum GLint GLenum GLenum GLenum GLfloat GLenum GLenum GLint GLenum GLfloat GLenum GLint GLint GLushort GLenum GLenum GLfloat GLenum GLenum GLint GLfloat const GLubyte GLenum GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLint GLint GLsizei GLsizei GLint GLenum GLenum const GLvoid GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLenum const GLdouble GLenum GLenum const GLfloat GLenum GLenum const GLint GLsizei GLuint GLfloat GLuint GLbitfield GLfloat GLint GLuint GLboolean GLenum GLfloat GLenum GLbitfield GLenum GLfloat GLfloat GLint GLint const GLfloat GLenum GLfloat GLfloat GLint GLint GLfloat GLfloat GLint GLint const GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat const GLdouble const GLfloat const GLdouble const GLfloat GLint i
Definition: glfuncs.h:248
#define d
Definition: ke_i.h:81
#define TRACE(s)
Definition: solgame.cpp:4
#define SEC_E_OK
Definition: winerror.h:2356
#define SEC_E_BUFFER_TOO_SMALL
Definition: winerror.h:2937
#define SEC_E_INVALID_TOKEN
Definition: winerror.h:2917

Referenced by ntlm_AcceptSecurityContext(), and ntlm_InitializeSecurityContextW().

◆ encodeBase64()

SECURITY_STATUS encodeBase64 ( PBYTE  in_buf,
int  in_len,
char out_buf,
int  max_len,
int out_len 
)

Definition at line 29 of file base64_codec.c.

31{
32 int div, i;
33 PBYTE d = in_buf;
34 int bytes = (in_len*8 + 5)/6, pad_bytes = (bytes % 4) ? 4 - (bytes % 4) : 0;
35
36 TRACE("bytes is %d, pad bytes is %d\n", bytes, pad_bytes);
37 *out_len = bytes + pad_bytes;
38
39 if(bytes + pad_bytes + 1 > max_len)
41
42 /* Three bytes of input give 4 chars of output */
43 div = in_len / 3;
44
45 i = 0;
46 while(div > 0)
47 {
48 /* first char is the first 6 bits of the first byte*/
49 out_buf[i + 0] = b64[ ( d[0] >> 2) & 0x3f ];
50 /* second char is the last 2 bits of the first byte and the first 4
51 * bits of the second byte */
52 out_buf[i + 1] = b64[ ((d[0] << 4) & 0x30) | (d[1] >> 4 & 0x0f)];
53 /* third char is the last 4 bits of the second byte and the first 2
54 * bits of the third byte */
55 out_buf[i + 2] = b64[ ((d[1] << 2) & 0x3c) | (d[2] >> 6 & 0x03)];
56 /* fourth char is the remaining 6 bits of the third byte */
57 out_buf[i + 3] = b64[ d[2] & 0x3f];
58 i += 4;
59 d += 3;
60 div--;
61 }
62
63 switch(pad_bytes)
64 {
65 case 1:
66 /* first char is the first 6 bits of the first byte*/
67 out_buf[i + 0] = b64[ ( d[0] >> 2) & 0x3f ];
68 /* second char is the last 2 bits of the first byte and the first 4
69 * bits of the second byte */
70 out_buf[i + 1] = b64[ ((d[0] << 4) & 0x30) | (d[1] >> 4 & 0x0f)];
71 /* third char is the last 4 bits of the second byte padded with
72 * two zeroes */
73 out_buf[i + 2] = b64[ ((d[1] << 2) & 0x3c) ];
74 /* fourth char is a = to indicate one byte of padding */
75 out_buf[i + 3] = '=';
76 out_buf[i + 4] = 0;
77 break;
78 case 2:
79 /* first char is the first 6 bits of the first byte*/
80 out_buf[i + 0] = b64[ ( d[0] >> 2) & 0x3f ];
81 /* second char is the last 2 bits of the first byte padded with
82 * four zeroes*/
83 out_buf[i + 1] = b64[ ((d[0] << 4) & 0x30)];
84 /* third char is = to indicate padding */
85 out_buf[i + 2] = '=';
86 /* fourth char is = to indicate padding */
87 out_buf[i + 3] = '=';
88 out_buf[i + 4] = 0;
89 break;
90 default:
91 out_buf[i] = 0;
92 }
93
94 return SEC_E_OK;
95}
_STLP_VENDOR_CSTD::ldiv_t div(long __x, long __y)
Definition: _cstdlib.h:137
static unsigned char bytes[4]
Definition: adnsresfilter.c:74
static const char b64[]
Definition: base64_codec.c:26
BYTE * PBYTE
Definition: pedump.c:66

Referenced by ntlm_AcceptSecurityContext(), and ntlm_InitializeSecurityContextW().

◆ WINE_DEFAULT_DEBUG_CHANNEL()

WINE_DEFAULT_DEBUG_CHANNEL ( ntlm  )

Variable Documentation

◆ b64

const char b64[]
static
Initial value:
=
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"

Definition at line 26 of file base64_codec.c.

Referenced by encodeBase64().