liveMedia/our_md5.h File Reference

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Data Structures
struct	MD5Context
Defines
#define	_ANSI_ARGS_(x)   ()
#define	EXTERN   extern
Typedefs
typedef unsigned	UNSIGNED32
typedef MD5Context	MD5_CTX
Functions
EXTERN void	our_MD5Init (MD5_CTX *)
EXTERN void	ourMD5Update (MD5_CTX *, const unsigned char *, unsigned int)
EXTERN void	our_MD5Pad (MD5_CTX *)
EXTERN void	our_MD5Final (unsigned char[16], MD5_CTX *)
EXTERN char *	our_MD5End (MD5_CTX *, char *)
EXTERN char *	our_MD5File (const char *, char *)
EXTERN char *	our_MD5Data (const unsigned char *, unsigned int, char *)

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Define Documentation

#define _ANSI_ARGS_

(

x

)

()

Definition at line 39 of file our_md5.h.

#define EXTERN   extern

Definition at line 44 of file our_md5.h.

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Typedef Documentation

typedef struct MD5Context MD5_CTX

typedef unsigned UNSIGNED32

Definition at line 30 of file our_md5.h.

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Function Documentation

EXTERN char* our_MD5Data	(	const unsigned char *	,
		unsigned	int,
		char *
	)

Definition at line 61 of file our_md5hl.c.

References our_MD5End(), our_MD5Init(), and ourMD5Update().

Referenced by Authenticator::computeDigestResponse(), Authenticator::setRealmAndRandomNonce(), and RTSPClient::setupHTTPTunneling().

{
    MD5_CTX ctx;

    our_MD5Init(&ctx);
    ourMD5Update(&ctx,data,len);
    return our_MD5End(&ctx, buf);
}

EXTERN char* our_MD5End	(	MD5_CTX *	,
		char *
	)

Definition at line 22 of file our_md5hl.c.

References LENGTH, and our_MD5Final().

Referenced by our_MD5Data(), and our_MD5File().

{
    int i;
    unsigned char digest[LENGTH];
    static const char hex[]="0123456789abcdef";

    if (!buf)
        buf = (char*)malloc(2*LENGTH + 1);
    if (!buf)
        return 0;
    our_MD5Final(digest, ctx);
    for (i = 0; i < LENGTH; i++) {
        buf[i+i] = hex[digest[i] >> 4];
        buf[i+i+1] = hex[digest[i] & 0x0f];
    }
    buf[i+i] = '\0';
    return buf;
}

EXTERN char* our_MD5File	(	const char *	,
		char *
	)

Definition at line 42 of file our_md5hl.c.

References BUFSIZ, NULL, our_MD5End(), our_MD5Init(), and ourMD5Update().

{
    unsigned char buffer[BUFSIZ];
    MD5_CTX ctx;
    int i;
        FILE* f;

    our_MD5Init(&ctx);
    f = fopen(filename, "r");
    if (f == NULL) return 0;
    while ((i = fread(buffer,1,sizeof buffer,f)) > 0) {
        ourMD5Update(&ctx,buffer,i);
    }
    fclose(f);
    if (i < 0) return 0;
    return our_MD5End(&ctx, buf);
}

EXTERN void our_MD5Final	(	unsigned char	digest[16],
		MD5_CTX *	context
	)

our_MD5Final: : 16-byte buffer to write MD5 checksum. : MD5 context to be finalized.

Ends an MD5 message-digest operation, writing the the message digest and zeroing the context. The context must be initialized with our_MD5Init() before being used for other MD5 checksum calculations.

Definition at line 294 of file our_md5.c.

References MD5Context::count, Encode(), ourMD5Update(), and PADDING.

Referenced by our_MD5End().

{
        unsigned char   bits[8];
        unsigned int    index, padLen;

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

        /*
         * Pad out to 56 mod 64.
         */
        index = (unsigned int) ((context->count[0] >> 3) & 0x3f);
        padLen = (index < 56) ? (56 - index) : (120 - index);
        ourMD5Update(context, PADDING, padLen);

        /* Append length (before padding) */
        ourMD5Update(context, bits, 8);
        /* Store state in digest */
        Encode(digest, context->state, 16);

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

EXTERN void our_MD5Init

(

MD5_CTX *

context

)

our_MD5Init: : MD5 context to be initialized.

Initializes MD5 context for the start of message digest computation.

Definition at line 229 of file our_md5.c.

References MD5Context::count, and MD5Context::state.

Referenced by our_MD5Data(), and our_MD5File().

{
        context->count[0] = context->count[1] = 0;
        /* Load magic initialization constants.  */
        context->state[0] = 0x67452301;
        context->state[1] = 0xefcdab89;
        context->state[2] = 0x98badcfe;
        context->state[3] = 0x10325476;
}

EXTERN void our_MD5Pad

(

MD5_CTX *

)

EXTERN void ourMD5Update	(	MD5_CTX *	context,
		const unsigned char *	input,
		unsigned int	inputLen
	)

ourMD5Update: : MD5 context to be updated. : pointer to data to be fed into MD5 algorithm. : size of data in bytes.

MD5 block update operation. Continues an MD5 message-digest operation, processing another message block, and updating the context.

Definition at line 250 of file our_md5.c.

References MD5Context::buffer, MD5Context::count, MD5Transform(), and MD5Context::state.

Referenced by our_MD5Data(), our_MD5File(), and our_MD5Final().

{
        unsigned int    i, index, partLen;

        /* Compute number of bytes mod 64 */
        index = (unsigned int) ((context->count[0] >> 3) & 0x3F);

        /* Update number of bits */
        if ((context->count[0] += ((UNSIGNED32) inputLen << 3)) < ((UNSIGNED32) inputLen << 3)) {
                context->count[1]++;
        }
        context->count[1] += ((UNSIGNED32) inputLen >> 29);

        partLen = 64 - index;

        /* Transform as many times as possible.  */
        if (inputLen >= partLen) {
                memcpy((unsigned char *) & context->buffer[index], (unsigned char *) input, partLen);
                MD5Transform(context->state, context->buffer);

                for (i = partLen; i + 63 < inputLen; i += 64) {
                        MD5Transform(context->state, &input[i]);
                }
                index = 0;
        } else {
                i = 0;
        }
        /* Buffer remaining input */
        if ((inputLen - i) != 0) {
                memcpy((unsigned char *) & context->buffer[index], (unsigned char *) & input[i], inputLen - i);
        }
}

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