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/**
* XMLSec library
*
* Reading/writing bignum values
*
* This is free software; see Copyright file in the source
* distribution for precise wording.
*
* Copyright (c) 2003 America Online, Inc. All rights reserved.
*/
#include "globals.h"
#include <stdlib.h>
#include <string.h>
#include <nss.h>
#include <secitem.h>
#include <libxml/tree.h>
#include <xmlsec/xmlsec.h>
#include <xmlsec/buffer.h>
#include <xmlsec/base64.h>
#include <xmlsec/errors.h>
#include <xmlsec/nss/crypto.h>
#include <xmlsec/nss/bignum.h>
/**
* xmlSecNssNodeGetBigNumValue:
* @arena: the arena from which to allocate memory
* @cur: the poitner to an XML node.
* @a: a SECItem object to hold the BigNum value
*
* Converts the node content from CryptoBinary format
* (http://www.w3.org/TR/xmldsig-core/#sec-CryptoBinary)
* to a SECItem. If no SECItem object provided then a new
* one is created (caller is responsible for freeing it).
*
* Returns: a pointer to SECItem produced from CryptoBinary string
* or NULL if an error occurs.
*/
SECItem *
xmlSecNssNodeGetBigNumValue(PRArenaPool *arena, const xmlNodePtr cur,
SECItem *a) {
xmlSecBuffer buf;
int ret;
SECItem *rv;
int len;
xmlSecAssert2(arena != NULL, NULL);
xmlSecAssert2(cur != NULL, NULL);
ret = xmlSecBufferInitialize(&buf, 128);
if(ret < 0) {
xmlSecError(XMLSEC_ERRORS_HERE,
NULL,
"xmlSecBufferInitialize",
XMLSEC_ERRORS_R_XMLSEC_FAILED,
XMLSEC_ERRORS_NO_MESSAGE);
return(NULL);
}
ret = xmlSecBufferBase64NodeContentRead(&buf, cur);
if(ret < 0) {
xmlSecError(XMLSEC_ERRORS_HERE,
NULL,
"xmlSecBufferBase64NodeContentRead",
XMLSEC_ERRORS_R_XMLSEC_FAILED,
XMLSEC_ERRORS_NO_MESSAGE);
xmlSecBufferFinalize(&buf);
return(NULL);
}
len = xmlSecBufferGetSize(&buf);
if (a == NULL) {
rv = SECITEM_AllocItem(arena, NULL, len);
} else {
rv = a;
xmlSecAssert2(rv->data == NULL, NULL);
rv->len = len;
rv->data = PORT_ArenaZAlloc(arena, len);
}
PORT_Memcpy(rv->data, xmlSecBufferGetData(&buf), len);
xmlSecBufferFinalize(&buf);
return(rv);
}
/**
* xmlSecNssNodeSetBigNumValue:
* @cur: the pointer to an XML node.
* @a: a SECItem containing the BigNum value.
* @addLineBreaks: if the flag is equal to 1 then
* linebreaks will be added before and after
* new buffer content.
*
* Converts SECItem to CryptoBinary string
* (http://www.w3.org/TR/xmldsig-core/#sec-CryptoBinary)
* and sets it as the content of the given node. If the
* addLineBreaks is set then line breaks are added
* before and after the CryptoBinary string.
*
* Returns: 0 on success or -1 otherwise.
*/
int
xmlSecNssNodeSetBigNumValue(xmlNodePtr cur, const SECItem *a, int addLineBreaks) {
xmlSecBuffer buf;
int ret;
xmlSecAssert2(a != NULL, -1);
xmlSecAssert2(cur != NULL, -1);
ret = xmlSecBufferInitialize(&buf, a->len + 1);
if(ret < 0) {
xmlSecError(XMLSEC_ERRORS_HERE,
NULL,
"xmlSecBufferInitialize",
XMLSEC_ERRORS_R_XMLSEC_FAILED,
"size=%d", a->len + 1);
return(-1);
}
PORT_Memcpy(xmlSecBufferGetData(&buf), a->data, a->len);
ret = xmlSecBufferSetSize(&buf, a->len);
if(ret < 0) {
xmlSecError(XMLSEC_ERRORS_HERE,
NULL,
"xmlSecBufferSetSize",
XMLSEC_ERRORS_R_XMLSEC_FAILED,
"size=%d", a->len);
xmlSecBufferFinalize(&buf);
return(-1);
}
if(addLineBreaks) {
xmlNodeSetContent(cur, xmlSecStringCR);
} else {
xmlNodeSetContent(cur, xmlSecStringEmpty);
}
ret = xmlSecBufferBase64NodeContentWrite(&buf, cur, xmlSecBase64GetDefaultLineSize());
if(ret < 0) {
xmlSecError(XMLSEC_ERRORS_HERE,
NULL,
"xmlSecBufferBase64NodeContentWrite",
XMLSEC_ERRORS_R_XMLSEC_FAILED,
XMLSEC_ERRORS_NO_MESSAGE);
xmlSecBufferFinalize(&buf);
return(-1);
}
if(addLineBreaks) {
xmlNodeAddContent(cur, xmlSecStringCR);
}
xmlSecBufferFinalize(&buf);
return(0);
}
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