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md5.h File Reference
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Data Structures

struct  MD5Context
 

Macros

#define HEADER_MD5_H
 
#define uint32   unsigned
 

Functions

void MD5Init (struct MD5Context *context)
 
void MD5Update (struct MD5Context *context, unsigned char const *buf, unsigned len)
 
void MD5Final (unsigned char digest[16], struct MD5Context *context)
 

Macro Definition Documentation

◆ HEADER_MD5_H

#define HEADER_MD5_H

Definition at line 25 of file md5.h.

◆ uint32

#define uint32   unsigned

Definition at line 42 of file md5.h.

Function Documentation

◆ MD5Final()

void MD5Final ( unsigned char  digest[16],
struct MD5Context context 
)

Definition at line 118 of file md5.c.

References MD5Context::bits, MD5Context::buf, byteReverse(), MD5Context::in, MD5Transform(), and uint32.

Referenced by hmac_md5_final(), ntlmssp_genauth_ntlm2(), and simple_packet_signature_ntlmssp().

119 {
120  unsigned int count;
121  unsigned char *p;
122 
123  /* Compute number of bytes mod 64 */
124  count = (ctx->bits[0] >> 3) & 0x3F;
125 
126  /* Set the first char of padding to 0x80. This is safe since there is
127  always at least one byte free */
128  p = ctx->in + count;
129  *p++ = 0x80;
130 
131  /* Bytes of padding needed to make 64 bytes */
132  count = 64 - 1 - count;
133 
134  /* Pad out to 56 mod 64 */
135  if (count < 8)
136  {
137  /* Two lots of padding: Pad the first block to 64 bytes */
138  memset (p, 0, count);
139  byteReverse (ctx->in, 16);
140  MD5Transform (ctx->buf, (uint32 *) ctx->in);
141 
142  /* Now fill the next block with 56 bytes */
143  memset (ctx->in, 0, 56);
144  }
145  else
146  {
147  /* Pad block to 56 bytes */
148  memset (p, 0, count - 8);
149  }
150  byteReverse (ctx->in, 14);
151 
152  /* Append length in bits and transform */
153  ((uint32 *) ctx->in)[14] = ctx->bits[0];
154  ((uint32 *) ctx->in)[15] = ctx->bits[1];
155 
156  MD5Transform (ctx->buf, (uint32 *) ctx->in);
157  byteReverse ((unsigned char *) ctx->buf, 4);
158  memmove (digest, ctx->buf, 16);
159  memset (ctx, 0, sizeof (*ctx)); /* In case it's sensitive */
160 }
#define uint32
Definition: genrand.c:54
static void byteReverse(unsigned char *buf, unsigned longs)
Definition: md5.c:32
static void MD5Transform(uint32 buf[4], uint32 const in[16])
Definition: md5.c:180
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◆ MD5Init()

void MD5Init ( struct MD5Context context)

Definition at line 50 of file md5.c.

References MD5Context::bits, and MD5Context::buf.

Referenced by hmac_md5_final(), hmac_md5_init_limK_to_64(), ntlmssp_genauth_ntlm2(), and simple_packet_signature_ntlmssp().

51 {
52  ctx->buf[0] = 0x67452301;
53  ctx->buf[1] = 0xefcdab89;
54  ctx->buf[2] = 0x98badcfe;
55  ctx->buf[3] = 0x10325476;
56 
57  ctx->bits[0] = 0;
58  ctx->bits[1] = 0;
59 }
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◆ MD5Update()

void MD5Update ( struct MD5Context context,
unsigned char const *  buf,
unsigned  len 
)

Definition at line 66 of file md5.c.

References MD5Context::bits, MD5Context::buf, byteReverse(), MD5Context::in, MD5Transform(), and uint32.

Referenced by hmac_md5_final(), hmac_md5_init_limK_to_64(), hmac_md5_update(), ntlmssp_genauth_ntlm2(), and simple_packet_signature_ntlmssp().

67 {
68  register uint32 t;
69 
70  /* Update bitcount */
71 
72  t = ctx->bits[0];
73  if ((ctx->bits[0] = t + ((uint32) len << 3)) < t)
74  ctx->bits[1]++; /* Carry from low to high */
75  ctx->bits[1] += len >> 29;
76 
77  t = (t >> 3) & 0x3f; /* Bytes already in shsInfo->data */
78 
79  /* Handle any leading odd-sized chunks */
80 
81  if (t)
82  {
83  unsigned char *p = (unsigned char *) ctx->in + t;
84 
85  t = 64 - t;
86  if (len < t)
87  {
88  memmove (p, buf, len);
89  return;
90  }
91  memmove (p, buf, t);
92  byteReverse (ctx->in, 16);
93  MD5Transform (ctx->buf, (uint32 *) ctx->in);
94  buf += t;
95  len -= t;
96  }
97  /* Process data in 64-byte chunks */
98 
99  while (len >= 64)
100  {
101  memmove (ctx->in, buf, 64);
102  byteReverse (ctx->in, 16);
103  MD5Transform (ctx->buf, (uint32 *) ctx->in);
104  buf += 64;
105  len -= 64;
106  }
107 
108  /* Handle any remaining bytes of data. */
109 
110  memmove (ctx->in, buf, len);
111 }
#define uint32
Definition: genrand.c:54
static void byteReverse(unsigned char *buf, unsigned longs)
Definition: md5.c:32
static void MD5Transform(uint32 buf[4], uint32 const in[16])
Definition: md5.c:180
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