jk_md5.c

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    ebcdic2ascii(&context->buffer[idx], &input[i], inputLen - i);
#endif /*CHARSET_EBCDIC */
}

/* MD5 finalization. Ends an MD5 message-digest operation, writing the
   the message digest and zeroizing the context.
 */
static void JK_METHOD jk_MD5Final(unsigned char digest[16], JK_MD5_CTX * context)
{
    unsigned char bits[8];
    size_t idx, padLen;


    /* Save number of bits */
    Encode(bits, context->count, 8);

#ifdef CHARSET_EBCDIC
    /* XXX: @@@: In order to make this no more complex than necessary,
     * this kludge converts the bits[] array using the ascii-to-ebcdic
     * table, because the following jk_MD5Update() re-translates
     * its input (ebcdic-to-ascii).
     * Otherwise, we would have to pass a "conversion" flag to jk_MD5Update()
     */
    ascii2ebcdic(bits, bits, 8);

    /* Since everything is converted to ascii within jk_MD5Update(), 
     * the initial 0x80 (PADDING[0]) must be stored as 0x20 
     */
    ascii2ebcdic(PADDING, PADDING, 1);
#endif /*CHARSET_EBCDIC */

    /* Pad out to 56 mod 64. */
    idx = (size_t) ((context->count[0] >> 3) & 0x3f);
    padLen = (idx < 56) ? (56 - idx) : (120 - idx);
    jk_MD5Update(context, (const unsigned char *)PADDING, padLen);

    /* Append length (before padding) */
    jk_MD5Update(context, (const unsigned char *)bits, 8);

    /* Store state in digest */
    Encode(digest, context->state, 16);

    /* Zeroize sensitive information. */
    memset(context, 0, sizeof(*context));
}

/* MD5 basic transformation. Transforms state based on block. */
static void MD5Transform(JK_UINT4 state[4], const unsigned char block[64])
{
    JK_UINT4 a = state[0], b = state[1], c = state[2], d = state[3], x[16];

    Decode(x, block, 64);

    /* Round 1 */
    FF(a, b, c, d, x[0], S11, 0xd76aa478);      /* 1 */
    FF(d, a, b, c, x[1], S12, 0xe8c7b756);      /* 2 */
    FF(c, d, a, b, x[2], S13, 0x242070db);      /* 3 */
    FF(b, c, d, a, x[3], S14, 0xc1bdceee);      /* 4 */
    FF(a, b, c, d, x[4], S11, 0xf57c0faf);      /* 5 */
    FF(d, a, b, c, x[5], S12, 0x4787c62a);      /* 6 */
    FF(c, d, a, b, x[6], S13, 0xa8304613);      /* 7 */
    FF(b, c, d, a, x[7], S14, 0xfd469501);      /* 8 */
    FF(a, b, c, d, x[8], S11, 0x698098d8);      /* 9 */
    FF(d, a, b, c, x[9], S12, 0x8b44f7af);      /* 10 */
    FF(c, d, a, b, x[10], S13, 0xffff5bb1);     /* 11 */
    FF(b, c, d, a, x[11], S14, 0x895cd7be);     /* 12 */
    FF(a, b, c, d, x[12], S11, 0x6b901122);     /* 13 */
    FF(d, a, b, c, x[13], S12, 0xfd987193);     /* 14 */
    FF(c, d, a, b, x[14], S13, 0xa679438e);     /* 15 */
    FF(b, c, d, a, x[15], S14, 0x49b40821);     /* 16 */

    /* Round 2 */
    GG(a, b, c, d, x[1], S21, 0xf61e2562);      /* 17 */
    GG(d, a, b, c, x[6], S22, 0xc040b340);      /* 18 */
    GG(c, d, a, b, x[11], S23, 0x265e5a51);     /* 19 */
    GG(b, c, d, a, x[0], S24, 0xe9b6c7aa);      /* 20 */
    GG(a, b, c, d, x[5], S21, 0xd62f105d);      /* 21 */
    GG(d, a, b, c, x[10], S22, 0x2441453);      /* 22 */
    GG(c, d, a, b, x[15], S23, 0xd8a1e681);     /* 23 */
    GG(b, c, d, a, x[4], S24, 0xe7d3fbc8);      /* 24 */
    GG(a, b, c, d, x[9], S21, 0x21e1cde6);      /* 25 */
    GG(d, a, b, c, x[14], S22, 0xc33707d6);     /* 26 */
    GG(c, d, a, b, x[3], S23, 0xf4d50d87);      /* 27 */
    GG(b, c, d, a, x[8], S24, 0x455a14ed);      /* 28 */
    GG(a, b, c, d, x[13], S21, 0xa9e3e905);     /* 29 */
    GG(d, a, b, c, x[2], S22, 0xfcefa3f8);      /* 30 */
    GG(c, d, a, b, x[7], S23, 0x676f02d9);      /* 31 */
    GG(b, c, d, a, x[12], S24, 0x8d2a4c8a);     /* 32 */

    /* Round 3 */
    HH(a, b, c, d, x[5], S31, 0xfffa3942);      /* 33 */
    HH(d, a, b, c, x[8], S32, 0x8771f681);      /* 34 */
    HH(c, d, a, b, x[11], S33, 0x6d9d6122);     /* 35 */
    HH(b, c, d, a, x[14], S34, 0xfde5380c);     /* 36 */
    HH(a, b, c, d, x[1], S31, 0xa4beea44);      /* 37 */
    HH(d, a, b, c, x[4], S32, 0x4bdecfa9);      /* 38 */
    HH(c, d, a, b, x[7], S33, 0xf6bb4b60);      /* 39 */
    HH(b, c, d, a, x[10], S34, 0xbebfbc70);     /* 40 */
    HH(a, b, c, d, x[13], S31, 0x289b7ec6);     /* 41 */
    HH(d, a, b, c, x[0], S32, 0xeaa127fa);      /* 42 */
    HH(c, d, a, b, x[3], S33, 0xd4ef3085);      /* 43 */
    HH(b, c, d, a, x[6], S34, 0x4881d05);       /* 44 */
    HH(a, b, c, d, x[9], S31, 0xd9d4d039);      /* 45 */
    HH(d, a, b, c, x[12], S32, 0xe6db99e5);     /* 46 */
    HH(c, d, a, b, x[15], S33, 0x1fa27cf8);     /* 47 */
    HH(b, c, d, a, x[2], S34, 0xc4ac5665);      /* 48 */

    /* Round 4 */
    II(a, b, c, d, x[0], S41, 0xf4292244);      /* 49 */
    II(d, a, b, c, x[7], S42, 0x432aff97);      /* 50 */
    II(c, d, a, b, x[14], S43, 0xab9423a7);     /* 51 */
    II(b, c, d, a, x[5], S44, 0xfc93a039);      /* 52 */
    II(a, b, c, d, x[12], S41, 0x655b59c3);     /* 53 */
    II(d, a, b, c, x[3], S42, 0x8f0ccc92);      /* 54 */
    II(c, d, a, b, x[10], S43, 0xffeff47d);     /* 55 */
    II(b, c, d, a, x[1], S44, 0x85845dd1);      /* 56 */
    II(a, b, c, d, x[8], S41, 0x6fa87e4f);      /* 57 */
    II(d, a, b, c, x[15], S42, 0xfe2ce6e0);     /* 58 */
    II(c, d, a, b, x[6], S43, 0xa3014314);      /* 59 */
    II(b, c, d, a, x[13], S44, 0x4e0811a1);     /* 60 */
    II(a, b, c, d, x[4], S41, 0xf7537e82);      /* 61 */
    II(d, a, b, c, x[11], S42, 0xbd3af235);     /* 62 */
    II(c, d, a, b, x[2], S43, 0x2ad7d2bb);      /* 63 */
    II(b, c, d, a, x[9], S44, 0xeb86d391);      /* 64 */

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

    /* Zeroize sensitive information. */
    memset(x, 0, sizeof(x));
}

/* Encodes input (JK_UINT4) into output (unsigned char). Assumes len is
   a multiple of 4.
 */
static void Encode(unsigned char *output, const JK_UINT4 * input, size_t len)
{
    size_t i, j;
    JK_UINT4 k;

    for (i = 0, j = 0; j < len; i++, j += 4) {
        k = input[i];
        output[j] = (unsigned char)(k & 0xff);
        output[j + 1] = (unsigned char)((k >> 8) & 0xff);
        output[j + 2] = (unsigned char)((k >> 16) & 0xff);
        output[j + 3] = (unsigned char)((k >> 24) & 0xff);
    }
}

/* Decodes input (unsigned char) into output (JK_UINT4). Assumes len is
 * a multiple of 4.
 */
static void Decode(JK_UINT4 * output, const unsigned char *input, size_t len)
{
    size_t i, j;

    for (i = 0, j = 0; j < len; i++, j += 4)
        output[i] = ((JK_UINT4) input[j]) | (((JK_UINT4) input[j + 1]) << 8) |
            (((JK_UINT4) input[j + 2]) << 16) | (((JK_UINT4) input[j + 3]) <<
                                                 24);
}

char *JK_METHOD jk_md5(const unsigned char *org, const unsigned char *org2,
                       char *dst)
{
    JK_MD5_CTX ctx;
    char buf[JK_MD5_DIGESTSIZE + 1];

    jk_MD5Init(&ctx);
    jk_MD5Update(&ctx, org, strlen((const char *)org));

    if (org2 != NULL)
        jk_MD5Update(&ctx, org2, strlen((const char *)org2));

    jk_MD5Final((unsigned char *)buf, &ctx);
    return (jk_hextocstr((unsigned char *)buf, dst, JK_MD5_DIGESTSIZE));
}

#else /* USE_APACHE_MD5 */

#include "httpd.h"
#include "http_config.h"

#ifdef STANDARD20_MODULE_STUFF

#include "apr_md5.h"
#define  AP_MD5_CTX     apr_md5_ctx_t
#define  ap_MD5Init     apr_md5_init
#define  ap_MD5Update   apr_md5_update
#define  ap_MD5Final    apr_md5_final

#else /* STANDARD20_MODULE_STUFF */

#include "ap_md5.h"

#endif /* STANDARD20_MODULE_STUFF */

char *JK_METHOD jk_md5(const unsigned char *org, const unsigned char *org2,
                       char *dst)
{
    AP_MD5_CTX ctx;
    char buf[JK_MD5_DIGESTSIZE + 1];

    ap_MD5Init(&ctx);
    ap_MD5Update(&ctx, org, strlen((const char *)org));

    if (org2 != NULL)
        ap_MD5Update(&ctx, org2, strlen((const char *)org2));

    ap_MD5Final((unsigned char *)buf, &ctx);
    return (jk_hextocstr((unsigned char *)buf, dst, JK_MD5_DIGESTSIZE));
}

#endif /* USE_APACHE_MD5 */

/* Test values:
 * ""                  D4 1D 8C D9 8F 00 B2 04  E9 80 09 98 EC F8 42 7E
 * "a"                 0C C1 75 B9 C0 F1 B6 A8  31 C3 99 E2 69 77 26 61
 * "abc                90 01 50 98 3C D2 4F B0  D6 96 3F 7D 28 E1 7F 72
 * "message digest"    F9 6B 69 7D 7C B7 93 8D  52 5A 2F 31 AA F1 61 D0
 *
 */

#ifdef TEST_JKMD5

main(int argc, char **argv)
{
    char xxx[(2 * JK_MD5_DIGESTSIZE) + 1];

    if (argc > 1)
        printf("%s => %s\n", argv[1], jk_md5(argv[1], NULL, xxx));
}

#endif