include/md5.h

ソースコードを見る。

データ構造
struct	MD5Context
関数
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)

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関数

void MD5Init

(

struct MD5Context *

context

)

md5.c の 45 行で定義されています。

参照先 ctx.

参照元 calc_ntlmv2_key()・creds_init_128()・E_md5hash()・encode_or_decode_arc4_passwd_buffer()・hmac_md5_final()・hmac_md5_init_limK_to_64()・hmac_md5_init_rfc2104()・netdom_join_domain()・ntlmssp_client_challenge()・ntlmssp_server_auth()・simple_packet_signature().

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

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

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

md5.c の 60 行で定義されています。

参照先 byteReverse()・ctx・MD5Transform()・t.

参照元 calc_ntlmv2_key()・creds_init_128()・E_md5hash()・encode_or_decode_arc4_passwd_buffer()・hmac_md5_final()・hmac_md5_init_limK_to_64()・hmac_md5_init_rfc2104()・hmac_md5_update()・netdom_join_domain()・ntlmssp_client_challenge()・ntlmssp_server_auth()・simple_packet_signature().

{
    register uint32 t;

    /* Update bitcount */

    t = ctx->bits[0];
    if ((ctx->bits[0] = t + ((uint32) 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) {
            memmove(p, buf, len);
            return;
        }
        memmove(p, buf, t);
        byteReverse(ctx->in, 16);
        MD5Transform(ctx->buf, (uint32 *) ctx->in);
        buf += t;
        len -= t;
    }
    /* Process data in 64-byte chunks */

    while (len >= 64) {
        memmove(ctx->in, buf, 64);
        byteReverse(ctx->in, 16);
        MD5Transform(ctx->buf, (uint32 *) ctx->in);
        buf += 64;
        len -= 64;
    }

    /* Handle any remaining bytes of data. */

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

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

md5.c の 108 行で定義されています。

参照先 byteReverse()・ctx・MD5Transform().

参照元 calc_ntlmv2_key()・creds_init_128()・E_md5hash()・encode_or_decode_arc4_passwd_buffer()・hmac_md5_final()・hmac_md5_init_rfc2104()・netdom_join_domain()・ntlmssp_client_challenge()・ntlmssp_server_auth()・simple_packet_signature().

{
    unsigned int 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 = 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, (uint32 *) 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 */
    ((uint32 *) ctx->in)[14] = ctx->bits[0];
    ((uint32 *) ctx->in)[15] = ctx->bits[1];

    MD5Transform(ctx->buf, (uint32 *) ctx->in);
    byteReverse((unsigned char *) ctx->buf, 4);
    memmove(digest, ctx->buf, 16);
    memset(ctx, 0, sizeof(ctx));        /* In case it's sensitive */
}

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