From a8a2b9c7173aebcff637102caf5bfc2ecc882853 Mon Sep 17 00:00:00 2001 From: Wouter Cloetens Date: Thu, 8 May 2008 14:46:27 +0000 Subject: [PATCH] gst-libs/gst/rtsp/: Add Digest authorization support for RTSP connections. See #532065. Original commit message from CVS: Patch by: Wouter Cloetens * gst-libs/gst/rtsp/Makefile.am: * gst-libs/gst/rtsp/gstrtspconnection.c: (gst_rtsp_connection_create), (md5_digest_to_hex_string), (auth_digest_compute_hex_urp), (auth_digest_compute_response), (add_auth_header), (gst_rtsp_connection_free), (gst_rtsp_connection_set_auth), (str_case_hash), (str_case_equal), (gst_rtsp_connection_set_auth_param), (gst_rtsp_connection_clear_auth_params): * gst-libs/gst/rtsp/gstrtspconnection.h: Add Digest authorization support for RTSP connections. See #532065. * gst-libs/gst/rtsp/md5.c: * gst-libs/gst/rtsp/md5.h: Yeap, another md5 implementation until we can depend on a glib that has support for it. --- ChangeLog | 20 ++ gst-libs/gst/rtsp/Makefile.am | 5 +- gst-libs/gst/rtsp/gstrtspconnection.c | 193 +++++++++++++++++- gst-libs/gst/rtsp/gstrtspconnection.h | 6 + gst-libs/gst/rtsp/md5.c | 271 ++++++++++++++++++++++++++ gst-libs/gst/rtsp/md5.h | 28 +++ 6 files changed, 518 insertions(+), 5 deletions(-) create mode 100644 gst-libs/gst/rtsp/md5.c create mode 100644 gst-libs/gst/rtsp/md5.h diff --git a/ChangeLog b/ChangeLog index abaae5b427..27af700ecc 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,23 @@ +2008-05-08 Wim Taymans + + Patch by: Wouter Cloetens + + * gst-libs/gst/rtsp/Makefile.am: + * gst-libs/gst/rtsp/gstrtspconnection.c: + (gst_rtsp_connection_create), (md5_digest_to_hex_string), + (auth_digest_compute_hex_urp), (auth_digest_compute_response), + (add_auth_header), (gst_rtsp_connection_free), + (gst_rtsp_connection_set_auth), (str_case_hash), (str_case_equal), + (gst_rtsp_connection_set_auth_param), + (gst_rtsp_connection_clear_auth_params): + * gst-libs/gst/rtsp/gstrtspconnection.h: + Add Digest authorization support for RTSP connections. See #532065. + + * gst-libs/gst/rtsp/md5.c: + * gst-libs/gst/rtsp/md5.h: + Yeap, another md5 implementation until we can depend on a glib that has + support for it. + 2008-05-08 Sebastian Dröge Patch by: Sjoerd Simons diff --git a/gst-libs/gst/rtsp/Makefile.am b/gst-libs/gst/rtsp/Makefile.am index d35e4cd0f7..5470799a78 100644 --- a/gst-libs/gst/rtsp/Makefile.am +++ b/gst-libs/gst/rtsp/Makefile.am @@ -24,10 +24,11 @@ libgstrtsp_@GST_MAJORMINOR@_la_SOURCES = gstrtspbase64.c \ gstrtspmessage.c \ gstrtsprange.c \ gstrtsptransport.c \ - gstrtspurl.c + gstrtspurl.c \ + md5.c nodist_libgstrtsp_@GST_MAJORMINOR@_la_SOURCES = $(built_sources) -nodist_libgstrtspinclude_HEADERS = gstrtsp-enumtypes.h +nodist_libgstrtspinclude_HEADERS = gstrtsp-enumtypes.h md5.h noinst_HEADERS = gstrtsp.h diff --git a/gst-libs/gst/rtsp/gstrtspconnection.c b/gst-libs/gst/rtsp/gstrtspconnection.c index cd70c8f5fd..d4172fb288 100644 --- a/gst-libs/gst/rtsp/gstrtspconnection.c +++ b/gst-libs/gst/rtsp/gstrtspconnection.c @@ -92,6 +92,7 @@ #include "gstrtspconnection.h" #include "gstrtspbase64.h" +#include "md5.h" #ifdef G_OS_WIN32 #define FIONREAD_TYPE gulong @@ -161,6 +162,7 @@ gst_rtsp_connection_create (GstRTSPUrl * url, GstRTSPConnection ** conn) newconn->auth_method = GST_RTSP_AUTH_NONE; newconn->username = NULL; newconn->passwd = NULL; + newconn->auth_params = NULL; *conn = newconn; @@ -319,6 +321,65 @@ timeout: } } +static void +md5_digest_to_hex_string (unsigned char digest[16], char string[33]) +{ + static const char hexdigits[] = "0123456789abcdef"; + int i; + + for (i = 0; i < 16; i++) { + string[i * 2] = hexdigits[(digest[i] >> 4) & 0x0f]; + string[i * 2 + 1] = hexdigits[digest[i] & 0x0f]; + } + string[32] = 0; +} + +static void +auth_digest_compute_hex_urp (const gchar * username, + const gchar * realm, const gchar * password, gchar hex_urp[33]) +{ + struct MD5Context md5_context; + unsigned char digest[16]; + + MD5Init (&md5_context); + MD5Update (&md5_context, username, strlen (username)); + MD5Update (&md5_context, ":", 1); + MD5Update (&md5_context, realm, strlen (realm)); + MD5Update (&md5_context, ":", 1); + MD5Update (&md5_context, password, strlen (password)); + MD5Final (digest, &md5_context); + md5_digest_to_hex_string (digest, hex_urp); +} + +static void +auth_digest_compute_response (const gchar * method, + const gchar * uri, const gchar * hex_a1, const gchar * nonce, + gchar response[33]) +{ + char hex_a2[33]; + struct MD5Context md5_context; + unsigned char digest[16]; + + /* compute A2 */ + MD5Init (&md5_context); + MD5Update (&md5_context, method, strlen (method)); + MD5Update (&md5_context, ":", 1); + MD5Update (&md5_context, uri, strlen (uri)); + MD5Final (digest, &md5_context); + md5_digest_to_hex_string (digest, hex_a2); + + /* compute KD */ + MD5Init (&md5_context); + MD5Update (&md5_context, hex_a1, strlen (hex_a1)); + MD5Update (&md5_context, ":", 1); + MD5Update (&md5_context, nonce, strlen (nonce)); + MD5Update (&md5_context, ":", 1); + + MD5Update (&md5_context, hex_a2, 32); + MD5Final (digest, &md5_context); + md5_digest_to_hex_string (digest, response); +} + static void add_auth_header (GstRTSPConnection * conn, GstRTSPMessage * message) { @@ -338,6 +399,50 @@ add_auth_header (GstRTSPConnection * conn, GstRTSPMessage * message) g_free (auth_string); break; } + case GST_RTSP_AUTH_DIGEST:{ + gchar response[33], hex_urp[33]; + gchar *auth_string, *auth_string2; + gchar *realm; + gchar *nonce; + gchar *opaque; + const gchar *uri; + const gchar *method; + + /* we need to have some params set */ + if (conn->auth_params == NULL) + break; + + /* we need the realm and nonce */ + realm = (gchar *) g_hash_table_lookup (conn->auth_params, "realm"); + nonce = (gchar *) g_hash_table_lookup (conn->auth_params, "nonce"); + if (realm == NULL || nonce == NULL) + break; + + auth_digest_compute_hex_urp (conn->username, realm, conn->passwd, + hex_urp); + + method = gst_rtsp_method_as_text (message->type_data.request.method); + uri = message->type_data.request.uri; + + /* Assume no qop, algorithm=md5, stale=false */ + /* For algorithm MD5, a1 = urp. */ + auth_digest_compute_response (method, uri, hex_urp, nonce, response); + auth_string = g_strdup_printf ("Digest username=\"%s\", " + "realm=\"%s\", nonce=\"%s\", uri=\"%s\", response=\"%s\"", + conn->username, realm, nonce, uri, response); + + opaque = (gchar *) g_hash_table_lookup (conn->auth_params, "opaque"); + if (opaque) { + auth_string2 = g_strdup_printf ("%s, opaque=\"%s\"", auth_string, + opaque); + g_free (auth_string); + auth_string = auth_string2; + } + gst_rtsp_message_add_header (message, GST_RTSP_HDR_AUTHORIZATION, + auth_string); + g_free (auth_string); + break; + } default: /* Nothing to do */ break; @@ -1142,6 +1247,7 @@ gst_rtsp_connection_free (GstRTSPConnection * conn) g_timer_destroy (conn->timer); g_free (conn->username); g_free (conn->passwd); + gst_rtsp_connection_clear_auth_params (conn); g_free (conn); return res; @@ -1317,9 +1423,9 @@ GstRTSPResult gst_rtsp_connection_set_auth (GstRTSPConnection * conn, GstRTSPAuthMethod method, const gchar * user, const gchar * pass) { - /* Digest isn't implemented yet */ - if (method == GST_RTSP_AUTH_DIGEST) - return GST_RTSP_ENOTIMPL; + if (method == GST_RTSP_AUTH_DIGEST && ((user == NULL || pass == NULL) + || g_strrstr (user, ":") != NULL)) + return GST_RTSP_EINVAL; /* Make sure the username and passwd are being set for authentication */ if (method == GST_RTSP_AUTH_NONE && (user == NULL || pass == NULL)) @@ -1338,3 +1444,84 @@ gst_rtsp_connection_set_auth (GstRTSPConnection * conn, return GST_RTSP_OK; } + +/** + * str_case_hash: + * @key: ASCII string to hash + * + * Hashes @key in a case-insensitive manner. + * + * Return value: the hash code. + **/ +static guint +str_case_hash (gconstpointer key) +{ + const char *p = key; + guint h = g_ascii_toupper (*p); + + if (h) + for (p += 1; *p != '\0'; p++) + h = (h << 5) - h + g_ascii_toupper (*p); + + return h; +} + +/** + * str_case_equal: + * @v1: an ASCII string + * @v2: another ASCII string + * + * Compares @v1 and @v2 in a case-insensitive manner + * + * Return value: %TRUE if they are equal (modulo case) + **/ +static gboolean +str_case_equal (gconstpointer v1, gconstpointer v2) +{ + const char *string1 = v1; + const char *string2 = v2; + + return g_ascii_strcasecmp (string1, string2) == 0; +} + +/** + * gst_rtsp_connection_set_auth_param: + * @conn: a #GstRTSPConnection + * @param: authentication directive + * @value: value + * + * Setup @conn with authentication directives. This is not necesary for + * methods #GST_RTSP_AUTH_NONE and #GST_RTSP_AUTH_BASIC. For + * #GST_RTSP_AUTH_DIGEST, directives should be taken from the digest challenge + * in the WWW-Authenticate response header and can include realm, domain, + * nonce, opaque, stale, algorithm, qop as per RFC2617. + * + * Since: 0.10.20 + */ +void +gst_rtsp_connection_set_auth_param (GstRTSPConnection * conn, + const gchar * param, const gchar * value) +{ + if (conn->auth_params == NULL) { + conn->auth_params = + g_hash_table_new_full (str_case_hash, str_case_equal, g_free, g_free); + } + g_hash_table_insert (conn->auth_params, g_strdup (param), g_strdup (value)); +} + +/** + * gst_rtsp_connection_clear_auth_params: + * @conn: a #GstRTSPConnection + * + * Clear the list of authentication directives stored in @conn. + * + * Since: 0.10.20 + */ +void +gst_rtsp_connection_clear_auth_params (GstRTSPConnection * conn) +{ + if (conn->auth_params != NULL) { + g_hash_table_destroy (conn->auth_params); + conn->auth_params = NULL; + } +} diff --git a/gst-libs/gst/rtsp/gstrtspconnection.h b/gst-libs/gst/rtsp/gstrtspconnection.h index 7151591153..a497f86414 100644 --- a/gst-libs/gst/rtsp/gstrtspconnection.h +++ b/gst-libs/gst/rtsp/gstrtspconnection.h @@ -79,6 +79,7 @@ struct _GstRTSPConnection GstRTSPAuthMethod auth_method; gchar *username; gchar *passwd; + GHashTable *auth_params; }; /* opening/closing a connection */ @@ -114,6 +115,11 @@ GstRTSPResult gst_rtsp_connection_flush (GstRTSPConnection *conn, g GstRTSPResult gst_rtsp_connection_set_auth (GstRTSPConnection *conn, GstRTSPAuthMethod method, const gchar *user, const gchar *pass); +void gst_rtsp_connection_set_auth_param (GstRTSPConnection *conn, + const gchar * param, + const gchar *value); +void gst_rtsp_connection_clear_auth_params (GstRTSPConnection *conn); + G_END_DECLS #endif /* __GST_RTSP_CONNECTION_H__ */ diff --git a/gst-libs/gst/rtsp/md5.c b/gst-libs/gst/rtsp/md5.c new file mode 100644 index 0000000000..0593ee7cbf --- /dev/null +++ b/gst-libs/gst/rtsp/md5.c @@ -0,0 +1,271 @@ +/* + * This code implements the MD5 message-digest algorithm. + * The algorithm is due to Ron Rivest. This code was + * written by Colin Plumb in 1993, no copyright is claimed. + * This code is in the public domain; do with it what you wish. + * + * Equivalent code is available from RSA Data Security, Inc. + * This code has been tested against that, and is equivalent, + * except that you don't need to include two pages of legalese + * with every copy. + * + * To compute the message digest of a chunk of bytes, declare an + * MD5Context structure, pass it to MD5Init, call MD5Update as + * needed on buffers full of bytes, and then call MD5Final, which + * will fill a supplied 16-byte array with the digest. + */ + +/* Brutally hacked by John Walker back from ANSI C to K&R (no + prototypes) to maintain the tradition that Netfone will compile + with Sun's original "cc". */ + +#include /* for memcpy() */ +#include +#include "md5.h" + +#if G_BYTE_ORDER == G_BIG_ENDIAN +#define HIGHFIRST +#endif + +#ifndef HIGHFIRST +#define byteReverse(buf, len) /* Nothing */ +#else +/* + * Note: this code is harmless on little-endian machines. + */ +void +byteReverse (buf, longs) + unsigned char *buf; + unsigned longs; +{ + uint32 t; + + do { + t = (uint32) ((unsigned) buf[3] << 8 | buf[2]) << 16 | + ((unsigned) buf[1] << 8 | buf[0]); + *(uint32 *) buf = t; + buf += 4; + } while (--longs); +} +#endif + +/* + * Start MD5 accumulation. Set bit count to 0 and buffer to mysterious + * initialization constants. + */ +void +MD5Init (ctx) + struct MD5Context *ctx; +{ + ctx->buf[0] = 0x67452301; + ctx->buf[1] = 0xefcdab89; + ctx->buf[2] = 0x98badcfe; + ctx->buf[3] = 0x10325476; + + ctx->bits[0] = 0; + ctx->bits[1] = 0; +} + +/* + * Update context to reflect the concatenation of another buffer full + * of bytes. + */ +void +MD5Update (ctx, buf, len) + struct MD5Context *ctx; + const char *buf; + unsigned len; +{ + 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) { + memcpy (p, buf, len); + return; + } + memcpy (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) { + memcpy (ctx->in, buf, 64); + byteReverse (ctx->in, 16); + MD5Transform (ctx->buf, (uint32 *) ctx->in); + buf += 64; + len -= 64; + } + + /* Handle any remaining bytes of data. */ + + memcpy (ctx->in, buf, len); +} + +/* + * Final wrapup - pad to 64-byte boundary with the bit pattern + * 1 0* (64-bit count of bits processed, MSB-first) + */ +void +MD5Final (digest, ctx) + unsigned char digest[16]; + struct MD5Context *ctx; +{ + 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 = 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); + memcpy (digest, ctx->buf, 16); + memset (ctx, 0, sizeof (ctx)); /* In case it's sensitive */ +} + + +/* The four core functions - F1 is optimized somewhat */ + +/* #define F1(x, y, z) (x & y | ~x & z) */ +#define F1(x, y, z) (z ^ (x & (y ^ z))) +#define F2(x, y, z) F1(z, x, y) +#define F3(x, y, z) (x ^ y ^ z) +#define F4(x, y, z) (y ^ (x | ~z)) + +/* This is the central step in the MD5 algorithm. */ +#define MD5STEP(f, w, x, y, z, data, s) \ + ( w += f(x, y, z) + data, w = w<>(32-s), w += x ) + +/* + * The core of the MD5 algorithm, this alters an existing MD5 hash to + * reflect the addition of 16 longwords of new data. MD5Update blocks + * the data and converts bytes into longwords for this routine. + */ +void +MD5Transform (buf, in) + uint32 buf[4]; + uint32 in[16]; +{ + register uint32 a, b, c, d; + + a = buf[0]; + b = buf[1]; + c = buf[2]; + d = buf[3]; + + 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); + + buf[0] += a; + buf[1] += b; + buf[2] += c; + buf[3] += d; +} diff --git a/gst-libs/gst/rtsp/md5.h b/gst-libs/gst/rtsp/md5.h new file mode 100644 index 0000000000..35fc0f7a23 --- /dev/null +++ b/gst-libs/gst/rtsp/md5.h @@ -0,0 +1,28 @@ +#ifndef MD5_H +#define MD5_H + +#include "_stdint.h" + +#ifndef uint32 +typedef uint32_t uint32; +#endif + +struct MD5Context +{ + uint32 buf[4]; + uint32 bits[2]; + unsigned char in[64]; +}; + +extern void MD5Init (struct MD5Context *ctx); +extern void MD5Update (struct MD5Context *ctx, const char *buf, + unsigned len); +extern void MD5Final (unsigned char digest[16], struct MD5Context *ctx); +extern void MD5Transform (uint32 buf[4], uint32 in[16]); + +/* + * This is needed to make RSAREF happy on some MS-DOS compilers. + */ +typedef struct MD5Context MD5_CTX; + +#endif /* !MD5_H */