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citadel  8.12
Classes | Defines | Typedefs | Functions
md5.h File Reference
#include "sysdep.h"
#include "typesize.h"
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Classes

struct  MD5Context

Defines

#define MD5_DIGEST_LEN   16
#define MD5_HEXSTRING_SIZE   33

Typedefs

typedef struct MD5Context

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)
void MD5Transform (cit_uint32_t buf[4], cit_uint32_t const in[16])
char * make_apop_string (char *realpass, char *nonce, char *buffer, size_t n)

Class Documentation

struct MD5Context

Definition at line 8 of file md5.h.

Class Members
cit_uint32_t bits
cit_uint32_t buf
cit_uint32_t in

Define Documentation

#define MD5_DIGEST_LEN   16

Definition at line 28 of file md5.h.

#define MD5_HEXSTRING_SIZE   33

Definition at line 29 of file md5.h.


Typedef Documentation

typedef struct MD5Context

Definition at line 25 of file md5.h.


Function Documentation

char* make_apop_string ( char *  realpass,
char *  nonce,
char *  buffer,
size_t  n 
)

Definition at line 339 of file md5.c.

{
   struct MD5Context ctx;
   u_char rawdigest[MD5_DIGEST_LEN];
   int i;
   
   MD5Init(&ctx);
   MD5Update(&ctx, (u_char*)nonce, strlen(nonce));
   MD5Update(&ctx, (u_char*)realpass, strlen(realpass));
   MD5Final(rawdigest, &ctx);
   for (i=0; i<MD5_DIGEST_LEN; i++)
   {
      snprintf(&buffer[i*2], n - i*2, "%02X", (unsigned char) (rawdigest[i] & 0xff));
      buffer[i*2] = tolower(buffer[i*2]);
      buffer[(i*2)+1] = tolower(buffer[(i*2)+1]);
   }
   return buffer;
}

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

Definition at line 115 of file md5.c.

{
    unsigned count;
    unsigned char *p;

    /* Compute number of bytes mod 64 */
    count = (ctx->bits[0] >> 3) & 0x3F;

    /* Set the first char of padding to 0x80.  This is safe since there is
       always at least one byte free */
    p = ((unsigned char*)ctx->in) + count;
    *p++ = 0x80;

    /* Bytes of padding needed to make 64 bytes */
    count = 64 - 1 - count;

    /* Pad out to 56 mod 64 */
    if (count < 8) {
       /* Two lots of padding:  Pad the first block to 64 bytes */
       memset(p, 0, count);
       byteReverse(ctx->in, 16);
       MD5Transform(ctx->buf, ctx->in);

       /* Now fill the next block with 56 bytes */
       memset(ctx->in, 0, 56);
    } else {
       /* Pad block to 56 bytes */
       memset(p, 0, count - 8);
    }
    byteReverse(ctx->in, 14);

    /* Append length in bits and transform */
    ((cit_uint32_t *) ctx->in)[14] = ctx->bits[0];
    ((cit_uint32_t *) ctx->in)[15] = ctx->bits[1];

    MD5Transform(ctx->buf, (cit_uint32_t *) ctx->in);
    byteReverse((unsigned char *) ctx->buf, 4);
    memcpy(digest, ctx->buf, 16);
    memset(ctx, 0, sizeof(ctx));   /* In case it's sensitive */
}

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void MD5Init ( struct MD5Context context)

Definition at line 52 of file md5.c.

{
    ctx->buf[0] = 0x67452301;
    ctx->buf[1] = 0xefcdab89;
    ctx->buf[2] = 0x98badcfe;
    ctx->buf[3] = 0x10325476;

    ctx->bits[0] = 0;
    ctx->bits[1] = 0;
}

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void MD5Transform ( cit_uint32_t  buf[4],
cit_uint32_t const  in[16] 
)

Definition at line 180 of file md5.c.

{
    register cit_uint32_t a, b, c, d;

    a = buf[0];
    b = buf[1];
    c = buf[2];
    d = buf[3];

#ifdef __PUREC__     /* PureC Weirdness... (GG) */
    MD5STEP(F1(b,c,d), a, b, c, d, in[0] + 0xd76aa478L, 7);
    MD5STEP(F1(a,b,c), d, a, b, c, in[1] + 0xe8c7b756L, 12);
    MD5STEP(F1(d,a,b), c, d, a, b, in[2] + 0x242070dbL, 17);
    MD5STEP(F1(c,d,a), b, c, d, a, in[3] + 0xc1bdceeeL, 22);
    MD5STEP(F1(b,c,d), a, b, c, d, in[4] + 0xf57c0fafL, 7);
    MD5STEP(F1(a,b,c), d, a, b, c, in[5] + 0x4787c62aL, 12);
    MD5STEP(F1(d,a,b), c, d, a, b, in[6] + 0xa8304613L, 17);
    MD5STEP(F1(c,d,a), b, c, d, a, in[7] + 0xfd469501L, 22);
    MD5STEP(F1(b,c,d), a, b, c, d, in[8] + 0x698098d8L, 7);
    MD5STEP(F1(a,b,c), d, a, b, c, in[9] + 0x8b44f7afL, 12);
    MD5STEP(F1(d,a,b), c, d, a, b, in[10] + 0xffff5bb1L, 17);
    MD5STEP(F1(c,d,a), b, c, d, a, in[11] + 0x895cd7beL, 22);
    MD5STEP(F1(b,c,d), a, b, c, d, in[12] + 0x6b901122L, 7);
    MD5STEP(F1(a,b,c), d, a, b, c, in[13] + 0xfd987193L, 12);
    MD5STEP(F1(d,a,b), c, d, a, b, in[14] + 0xa679438eL, 17);
    MD5STEP(F1(c,d,a), b, c, d, a, in[15] + 0x49b40821L, 22);

    MD5STEP(F2(b,c,d), a, b, c, d, in[1] + 0xf61e2562L, 5);
    MD5STEP(F2(a,b,c), d, a, b, c, in[6] + 0xc040b340L, 9);
    MD5STEP(F2(d,a,b), c, d, a, b, in[11] + 0x265e5a51L, 14);
    MD5STEP(F2(c,d,a), b, c, d, a, in[0] + 0xe9b6c7aaL, 20);
    MD5STEP(F2(b,c,d), a, b, c, d, in[5] + 0xd62f105dL, 5);
    MD5STEP(F2(a,b,c), d, a, b, c, in[10] + 0x02441453L, 9);
    MD5STEP(F2(d,a,b), c, d, a, b, in[15] + 0xd8a1e681L, 14);
    MD5STEP(F2(c,d,a), b, c, d, a, in[4] + 0xe7d3fbc8L, 20);
    MD5STEP(F2(b,c,d), a, b, c, d, in[9] + 0x21e1cde6L, 5);
    MD5STEP(F2(a,b,c), d, a, b, c, in[14] + 0xc33707d6L, 9);
    MD5STEP(F2(d,a,b), c, d, a, b, in[3] + 0xf4d50d87L, 14);
    MD5STEP(F2(c,d,a), b, c, d, a, in[8] + 0x455a14edL, 20);
    MD5STEP(F2(b,c,d), a, b, c, d, in[13] + 0xa9e3e905L, 5);
    MD5STEP(F2(a,b,c), d, a, b, c, in[2] + 0xfcefa3f8L, 9);
    MD5STEP(F2(d,a,b), c, d, a, b, in[7] + 0x676f02d9L, 14);
    MD5STEP(F2(c,d,a), b, c, d, a, in[12] + 0x8d2a4c8aL, 20);

    MD5STEP(F3(b,c,d), a, b, c, d, in[5] + 0xfffa3942L, 4);
    MD5STEP(F3(a,b,c), d, a, b, c, in[8] + 0x8771f681L, 11);
    MD5STEP(F3(d,a,b), c, d, a, b, in[11] + 0x6d9d6122L, 16);
    MD5STEP(F3(c,d,a), b, c, d, a, in[14] + 0xfde5380cL, 23);
    MD5STEP(F3(b,c,d), a, b, c, d, in[1] + 0xa4beea44L, 4);
    MD5STEP(F3(a,b,c), d, a, b, c, in[4] + 0x4bdecfa9L, 11);
    MD5STEP(F3(d,a,b), c, d, a, b, in[7] + 0xf6bb4b60L, 16);
    MD5STEP(F3(c,d,a), b, c, d, a, in[10] + 0xbebfbc70L, 23);
    MD5STEP(F3(b,c,d), a, b, c, d, in[13] + 0x289b7ec6L, 4);
    MD5STEP(F3(a,b,c), d, a, b, c, in[0] + 0xeaa127faL, 11);
    MD5STEP(F3(d,a,b), c, d, a, b, in[3] + 0xd4ef3085L, 16);
    MD5STEP(F3(c,d,a), b, c, d, a, in[6] + 0x04881d05L, 23);
    MD5STEP(F3(b,c,d), a, b, c, d, in[9] + 0xd9d4d039L, 4);
    MD5STEP(F3(a,b,c), d, a, b, c, in[12] + 0xe6db99e5L, 11);
    MD5STEP(F3(d,a,b), c, d, a, b, in[15] + 0x1fa27cf8L, 16);
    MD5STEP(F3(c,d,a), b, c, d, a, in[2] + 0xc4ac5665L, 23);

    MD5STEP(F4(b,c,d), a, b, c, d, in[0] + 0xf4292244L, 6);
    MD5STEP(F4(a,b,c), d, a, b, c, in[7] + 0x432aff97L, 10);
    MD5STEP(F4(d,a,b), c, d, a, b, in[14] + 0xab9423a7L, 15);
    MD5STEP(F4(c,d,a), b, c, d, a, in[5] + 0xfc93a039L, 21);
    MD5STEP(F4(b,c,d), a, b, c, d, in[12] + 0x655b59c3L, 6);
    MD5STEP(F4(a,b,c), d, a, b, c, in[3] + 0x8f0ccc92L, 10);
    MD5STEP(F4(d,a,b), c, d, a, b, in[10] + 0xffeff47dL, 15);
    MD5STEP(F4(c,d,a), b, c, d, a, in[1] + 0x85845dd1L, 21);
    MD5STEP(F4(b,c,d), a, b, c, d, in[8] + 0x6fa87e4fL, 6);
    MD5STEP(F4(a,b,c), d, a, b, c, in[15] + 0xfe2ce6e0L, 10);
    MD5STEP(F4(d,a,b), c, d, a, b, in[6] + 0xa3014314L, 15);
    MD5STEP(F4(c,d,a), b, c, d, a, in[13] + 0x4e0811a1L, 21);
    MD5STEP(F4(b,c,d), a, b, c, d, in[4] + 0xf7537e82L, 6);
    MD5STEP(F4(a,b,c), d, a, b, c, in[11] + 0xbd3af235L, 10);
    MD5STEP(F4(d,a,b), c, d, a, b, in[2] + 0x2ad7d2bbL, 15);
    MD5STEP(F4(c,d,a), b, c, d, a, in[9] + 0xeb86d391L, 21);
#else
    MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
    MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
    MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
    MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
    MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
    MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
    MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
    MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
    MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
    MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
    MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
    MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
    MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
    MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
    MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
    MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);

    MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
    MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
    MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
    MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
    MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
    MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
    MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
    MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
    MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
    MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
    MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
    MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
    MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
    MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
    MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
    MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);

    MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
    MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
    MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
    MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
    MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
    MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
    MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
    MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
    MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
    MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
    MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
    MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
    MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
    MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
    MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
    MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);

    MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
    MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
    MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
    MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
    MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
    MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
    MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
    MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
    MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
    MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
    MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
    MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
    MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
    MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
    MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
    MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
#endif

    buf[0] += a;
    buf[1] += b;
    buf[2] += c;
    buf[3] += d;
}

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

Definition at line 67 of file md5.c.

{
    cit_uint32_t t;

    /* Update bitcount */

    t = ctx->bits[0];
    if ((ctx->bits[0] = t + ((cit_uint32_t) len << 3)) < t)
       ctx->bits[1]++;             /* Carry from low to high */
    ctx->bits[1] += len >> 29;

    t = (t >> 3) & 0x3f;    /* Bytes already in shsInfo->data */

    /* Handle any leading odd-sized chunks */

    if (t) {
       unsigned char *p = (unsigned char *) ctx->in + t;

       t = 64 - t;
       if (len < t) {
           memcpy(p, buf, len);
           return;
       }
       memcpy(p, buf, t);
       byteReverse(ctx->in, 16);
       MD5Transform(ctx->buf, ctx->in);
       buf += t;
       len -= t;
    }
    /* Process data in 64-byte chunks */

    while (len >= 64) {
       memcpy(ctx->in, buf, 64);
       byteReverse(ctx->in, 16);
       MD5Transform(ctx->buf, ctx->in);
       buf += 64;
       len -= 64;
    }

    /* Handle any remaining bytes of data. */

    memcpy(ctx->in, buf, len);
}

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