ReactOS  0.4.13-dev-922-g2fbff73
md5.h File Reference
#include <ntdef.h>
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Classes

struct  MD5_CTX
 

Functions

VOID NTAPI MD5Init (MD5_CTX *ctx)
 
VOID NTAPI MD5Update (MD5_CTX *ctx, const unsigned char *buf, unsigned int len)
 
VOID NTAPI MD5Final (MD5_CTX *ctx)
 

Function Documentation

◆ MD5Final()

VOID NTAPI MD5Final ( MD5_CTX ctx)

Definition at line 113 of file md5.c.

114 {
115  unsigned int count;
116  unsigned char *p;
117 
118  /* Compute number of bytes mod 64 */
119  count = (ctx->i[0] >> 3) & 0x3F;
120 
121  /* Set the first char of padding to 0x80. This is safe since there is
122  always at least one byte free */
123  p = ctx->in + count;
124  *p++ = 0x80;
125 
126  /* Bytes of padding needed to make 64 bytes */
127  count = 64 - 1 - count;
128 
129  /* Pad out to 56 mod 64 */
130  if (count < 8)
131  {
132  /* Two lots of padding: Pad the first block to 64 bytes */
133  memset( p, 0, count );
134  byteReverse( ctx->in, 16 );
135  MD5Transform( ctx->buf, (unsigned int *)ctx->in );
136 
137  /* Now fill the next block with 56 bytes */
138  memset( ctx->in, 0, 56 );
139  }
140  else
141  {
142  /* Pad block to 56 bytes */
143  memset( p, 0, count - 8 );
144  }
145 
146  byteReverse( ctx->in, 14 );
147 
148  /* Append length in bits and transform */
149  ((unsigned int *)ctx->in)[14] = ctx->i[0];
150  ((unsigned int *)ctx->in)[15] = ctx->i[1];
151 
152  MD5Transform( ctx->buf, (unsigned int *)ctx->in );
153  byteReverse( (unsigned char *)ctx->buf, 4 );
154  memcpy( ctx->digest, ctx->buf, 16 );
155 }
GLuint GLuint GLsizei count
Definition: gl.h:1545
void byteReverse(unsigned char *buf, unsigned longs)
Definition: util.c:8
static void MD5Transform(unsigned int buf[4], const unsigned int in[16])
Definition: md5.c:174
unsigned char digest[16]
Definition: msi.c:4083
#define memcpy(s1, s2, n)
Definition: mkisofs.h:878
unsigned int i[2]
Definition: msi.c:4080
unsigned int buf[4]
Definition: msi.c:4081
unsigned char in[64]
Definition: msi.c:4082
GLfloat GLfloat p
Definition: glext.h:8902
#define memset(x, y, z)
Definition: compat.h:39

◆ MD5Init()

VOID NTAPI MD5Init ( MD5_CTX ctx)

Definition at line 45 of file md5.c.

46 {
47  ctx->buf[0] = 0x67452301;
48  ctx->buf[1] = 0xefcdab89;
49  ctx->buf[2] = 0x98badcfe;
50  ctx->buf[3] = 0x10325476;
51 
52  ctx->i[0] = ctx->i[1] = 0;
53 }
unsigned int i[2]
Definition: msi.c:4080
unsigned int buf[4]
Definition: msi.c:4081

◆ MD5Update()

VOID NTAPI MD5Update ( MD5_CTX ctx,
const unsigned char buf,
unsigned int  len 
)

Definition at line 59 of file md5.c.

60 {
61  register unsigned int t;
62 
63  /* Update bitcount */
64  t = ctx->i[0];
65 
66  if ((ctx->i[0] = t + (len << 3)) < t)
67  ctx->i[1]++; /* Carry from low to high */
68 
69  ctx->i[1] += len >> 29;
70  t = (t >> 3) & 0x3f;
71 
72  /* Handle any leading odd-sized chunks */
73  if (t)
74  {
75  unsigned char *p = (unsigned char *)ctx->in + t;
76  t = 64 - t;
77 
78  if (len < t)
79  {
80  memcpy( p, buf, len );
81  return;
82  }
83 
84  memcpy( p, buf, t );
85  byteReverse( ctx->in, 16 );
86 
87  MD5Transform( ctx->buf, (unsigned int *)ctx->in );
88 
89  buf += t;
90  len -= t;
91  }
92 
93  /* Process data in 64-byte chunks */
94  while (len >= 64)
95  {
96  memcpy( ctx->in, buf, 64 );
97  byteReverse( ctx->in, 16 );
98 
99  MD5Transform( ctx->buf, (unsigned int *)ctx->in );
100 
101  buf += 64;
102  len -= 64;
103  }
104 
105  /* Handle any remaining bytes of data. */
106  memcpy( ctx->in, buf, len );
107 }
GLenum GLuint GLenum GLsizei const GLchar * buf
Definition: glext.h:7751
GLdouble GLdouble t
Definition: gl.h:2047
void byteReverse(unsigned char *buf, unsigned longs)
Definition: util.c:8
static void MD5Transform(unsigned int buf[4], const unsigned int in[16])
Definition: md5.c:174
if(!(yy_init))
Definition: macro.lex.yy.c:714
#define memcpy(s1, s2, n)
Definition: mkisofs.h:878
GLenum GLsizei len
Definition: glext.h:6722
unsigned int i[2]
Definition: msi.c:4080
unsigned int buf[4]
Definition: msi.c:4081
unsigned char in[64]
Definition: msi.c:4082
GLfloat GLfloat p
Definition: glext.h:8902