Delete bundled copy of NSS and replace with README.

nss/lib/util/derdec.c

Index: nss/lib/util/derdec.c
diff --git a/nss/lib/util/derdec.c b/nss/lib/util/derdec.c
deleted file mode 100644
index 2c17ce939c4a2c71932bd250afe926e7ebe0cf64..0000000000000000000000000000000000000000
--- a/nss/lib/util/derdec.c
+++ /dev/null
@@ -1,189 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#include "secder.h"
-#include "secerr.h"
-
-static PRUint32
-der_indefinite_length(unsigned char *buf, unsigned char *end)
-{
-    PRUint32 len, ret, dataLen;
-    unsigned char tag, lenCode;
-    int dataLenLen;
-
-    len = 0;
-    while ( 1 ) {
-	if ((buf + 2) > end) {
-	    return(0);
-	}
-	
-	tag = *buf++;
-	lenCode = *buf++;
-	len += 2;
-	
-	if ( ( tag == 0 ) && ( lenCode == 0 ) ) {
-	    return(len);
-	}
-	
-	if ( lenCode == 0x80 ) {	/* indefinite length */
-	    ret = der_indefinite_length(buf, end); /* recurse to find length */
-	    if (ret == 0)
-		return 0;
-	    len += ret;
-	    buf += ret;
-	} else {			/* definite length */
-	    if (lenCode & 0x80) {
-		/* Length of data is in multibyte format */
-		dataLenLen = lenCode & 0x7f;
-		switch (dataLenLen) {
-		  case 1:
-		    dataLen = buf[0];
-		    break;
-		  case 2:
-		    dataLen = (buf[0]<<8)|buf[1];
-		    break;
-		  case 3:
-		    dataLen = ((unsigned long)buf[0]<<16)|(buf[1]<<8)|buf[2];
-		    break;
-		  case 4:
-		    dataLen = ((unsigned long)buf[0]<<24)|
-			((unsigned long)buf[1]<<16)|(buf[2]<<8)|buf[3];
-		    break;
-		  default:
-		    PORT_SetError(SEC_ERROR_BAD_DER);
-		    return SECFailure;
-		}
-	    } else {
-		/* Length of data is in single byte */
-		dataLen = lenCode;
-		dataLenLen = 0;
-	    }
-
-	    /* skip this item */
-	    buf = buf + dataLenLen + dataLen;
-	    len = len + dataLenLen + dataLen;
-	}
-    }
-}
-
-/*
-** Capture the next thing in the buffer.
-** Returns the length of the header and the length of the contents.
-*/
-static SECStatus
-der_capture(unsigned char *buf, unsigned char *end,
-	    int *header_len_p, PRUint32 *contents_len_p)
-{
-    unsigned char *bp;
-    unsigned char whole_tag;
-    PRUint32 contents_len;
-    int tag_number;
-
-    if ((buf + 2) > end) {
-	*header_len_p = 0;
-	*contents_len_p = 0;
-	if (buf == end)
-	    return SECSuccess;
-	return SECFailure;
-    }
-
-    bp = buf;
-
-    /* Get tag and verify that it is ok. */
-    whole_tag = *bp++;
-    tag_number = whole_tag & DER_TAGNUM_MASK;
-
-    /*
-     * XXX This code does not (yet) handle the high-tag-number form!
-     */
-    if (tag_number == DER_HIGH_TAG_NUMBER) {
-	PORT_SetError(SEC_ERROR_BAD_DER);
-	return SECFailure;
-    }
-
-    if ((whole_tag & DER_CLASS_MASK) == DER_UNIVERSAL) {
-	/* Check that the universal tag number is one we implement.  */
-	switch (tag_number) {
-	  case DER_BOOLEAN:
-	  case DER_INTEGER:
-	  case DER_BIT_STRING:
-	  case DER_OCTET_STRING:
-	  case DER_NULL:
-	  case DER_OBJECT_ID:
-	  case DER_SEQUENCE:
-	  case DER_SET:
-	  case DER_PRINTABLE_STRING:
-	  case DER_T61_STRING:
-	  case DER_IA5_STRING:
-	  case DER_VISIBLE_STRING:
-	  case DER_UTC_TIME:
-	  case 0:			/* end-of-contents tag */
-	    break;
-	  default:
-	    PORT_SetError(SEC_ERROR_BAD_DER);
-	    return SECFailure;
-	}
-    }
-
-    /*
-     * Get first byte of length code (might contain entire length, might not).
-     */
-    contents_len = *bp++;
-
-    /*
-     * If the high bit is set, then the length is in multibyte format,
-     * or the thing has an indefinite-length.
-     */
-    if (contents_len & 0x80) {
-	int bytes_of_encoded_len;
-
-	bytes_of_encoded_len = contents_len & 0x7f;
-	contents_len = 0;
-
-	switch (bytes_of_encoded_len) {
-	  case 4:
-	    contents_len |= *bp++;
-	    contents_len <<= 8;
-	    /* fallthru */
-	  case 3:
-	    contents_len |= *bp++;
-	    contents_len <<= 8;
-	    /* fallthru */
-	  case 2:
-	    contents_len |= *bp++;
-	    contents_len <<= 8;
-	    /* fallthru */
-	  case 1:
-	    contents_len |= *bp++;
-	    break;
-
-	  case 0:
-	    contents_len = der_indefinite_length (bp, end);
-	    if (contents_len)
-		break;
-	    /* fallthru */
-	  default:
-	    PORT_SetError(SEC_ERROR_BAD_DER);
-	    return SECFailure;
-	}
-    }
-
-    if ((bp + contents_len) > end) {
-	/* Ran past end of buffer */
-	PORT_SetError(SEC_ERROR_BAD_DER);
-	return SECFailure;
-    }
-
-    *header_len_p = (int)(bp - buf);
-    *contents_len_p = contents_len;
-
-    return SECSuccess;
-}
-
-SECStatus
-DER_Lengths(SECItem *item, int *header_len_p, PRUint32 *contents_len_p)
-{
-    return(der_capture(item->data, &item->data[item->len], header_len_p,
-		       contents_len_p));
-}