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pjs/security/nss/cmd/crmf-cgi/crmfcgi.c

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30 KiB
C
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/*
* The contents of this file are subject to the Mozilla Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is the Netscape security libraries.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1994-2000 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU General Public License Version 2 or later (the
* "GPL"), in which case the provisions of the GPL are applicable
* instead of those above. If you wish to allow use of your
* version of this file only under the terms of the GPL and not to
* allow others to use your version of this file under the MPL,
* indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by
* the GPL. If you do not delete the provisions above, a recipient
* may use your version of this file under either the MPL or the
* GPL.
*/
#include "seccomon.h"
#include "nss.h"
#include "key.h"
#include "cert.h"
#include "pk11func.h"
#include "secmod.h"
#include "cmmf.h"
#include "crmf.h"
#include "base64.h"
#include "secasn1.h"
#include "cryptohi.h"
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#define DEFAULT_ALLOC_SIZE 200
#define DEFAULT_CGI_VARS 20
typedef struct CGIVariableStr {
char *name;
char *value;
} CGIVariable;
typedef struct CGIVarTableStr {
CGIVariable **variables;
int numVars;
int numAlloc;
} CGIVarTable;
typedef struct CertResponseInfoStr {
CERTCertificate *cert;
long certReqID;
} CertResponseInfo;
typedef struct ChallengeCreationInfoStr {
long random;
SECKEYPublicKey *pubKey;
} ChallengeCreationInfo;
char *missingVar = NULL;
/*
* Error values.
*/
typedef enum {
NO_ERROR = 0,
NSS_INIT_FAILED,
AUTH_FAILED,
REQ_CGI_VAR_NOT_PRESENT,
CRMF_REQ_NOT_PRESENT,
BAD_ASCII_FOR_REQ,
CGI_VAR_MISSING,
COULD_NOT_FIND_CA,
COULD_NOT_DECODE_REQS,
OUT_OF_MEMORY,
ERROR_RETRIEVING_REQUEST_MSG,
ERROR_RETRIEVING_CERT_REQUEST,
ERROR_RETRIEVING_SUBJECT_FROM_REQ,
ERROR_RETRIEVING_PUBLIC_KEY_FROM_REQ,
ERROR_CREATING_NEW_CERTIFICATE,
COULD_NOT_START_EXTENSIONS,
ERROR_RETRIEVING_EXT_FROM_REQ,
ERROR_ADDING_EXT_TO_CERT,
ERROR_ENDING_EXTENSIONS,
COULD_NOT_FIND_ISSUER_PRIVATE_KEY,
UNSUPPORTED_SIGN_OPERATION_FOR_ISSUER,
ERROR_SETTING_SIGN_ALG,
ERROR_ENCODING_NEW_CERT,
ERROR_SIGNING_NEW_CERT,
ERROR_CREATING_CERT_REP_CONTENT,
ERROR_CREATING_SINGLE_CERT_RESPONSE,
ERROR_SETTING_CERT_RESPONSES,
ERROR_CREATING_CA_LIST,
ERROR_ADDING_ISSUER_TO_CA_LIST,
ERROR_ENCODING_CERT_REP_CONTENT,
NO_POP_FOR_REQUEST,
UNSUPPORTED_POP,
ERROR_RETRIEVING_POP_SIGN_KEY,
ERROR_RETRIEVING_ALG_ID_FROM_SIGN_KEY,
ERROR_RETRIEVING_SIGNATURE_FROM_POP_SIGN_KEY,
DO_CHALLENGE_RESPONSE,
ERROR_RETRIEVING_PUB_KEY_FROM_NEW_CERT,
ERROR_ENCODING_CERT_REQ_FOR_POP,
ERROR_VERIFYING_SIGNATURE_POP,
ERROR_RETRIEVING_PUB_KEY_FOR_CHALL,
ERROR_CREATING_EMPTY_CHAL_CONTENT,
ERROR_EXTRACTING_GEN_NAME_FROM_ISSUER,
ERROR_SETTING_CHALLENGE,
ERROR_ENCODING_CHALL,
ERROR_CONVERTING_CHALL_TO_BASE64,
ERROR_CONVERTING_RESP_FROM_CHALL_TO_BIN,
ERROR_CREATING_KEY_RESP_FROM_DER,
ERROR_RETRIEVING_CLIENT_RESPONSE_TO_CHALLENGE,
ERROR_RETURNED_CHALL_NOT_VALUE_EXPECTED,
ERROR_GETTING_KEY_ENCIPHERMENT,
ERROR_NO_POP_FOR_PRIVKEY,
ERROR_UNSUPPORTED_POPOPRIVKEY_TYPE
} ErrorCode;
const char *
CGITableFindValue(CGIVarTable *varTable, const char *key);
void
spitOutHeaders(void)
{
printf("Content-type: text/html\n\n");
}
void
dumpRequest(CGIVarTable *varTable)
{
int i;
CGIVariable *var;
printf ("<table border=1 cellpadding=1 cellspacing=1 width=\"100%%\">\n");
printf ("<tr><td><b><center>Variable Name<center></b></td>"
"<td><b><center>Value</center></b></td></tr>\n");
for (i=0; i<varTable->numVars; i++) {
var = varTable->variables[i];
printf ("<tr><td><pre>%s</pre></td><td><pre>%s</pre></td></tr>\n",
var->name, var->value);
}
printf("</table>\n");
}
void
echo_request(CGIVarTable *varTable)
{
spitOutHeaders();
printf("<html><head><title>CGI Echo Page</title></head>\n"
"<body><h1>Got the following request</h1>\n");
dumpRequest(varTable);
printf("</body></html>");
}
void
processVariable(CGIVariable *var)
{
char *plusSign, *percentSign;
/*First look for all of the '+' and convert them to spaces */
plusSign = var->value;
while ((plusSign=strchr(plusSign, '+')) != NULL) {
*plusSign = ' ';
}
percentSign = var->value;
while ((percentSign=strchr(percentSign, '%')) != NULL) {
char string[3];
int value;
string[0] = percentSign[1];
string[1] = percentSign[2];
string[2] = '\0';
sscanf(string,"%x", &value);
*percentSign = (char)value;
memmove(&percentSign[1], &percentSign[3], 1+strlen(&percentSign[3]));
}
}
char *
parseNextVariable(CGIVarTable *varTable, char *form_output)
{
char *ampersand, *equal;
CGIVariable *var;
if (varTable->numVars == varTable->numAlloc) {
CGIVariable **newArr = realloc(varTable->variables,
(varTable->numAlloc + DEFAULT_CGI_VARS)*sizeof(CGIVariable*));
if (newArr == NULL) {
return NULL;
}
varTable->variables = newArr;
varTable->numAlloc += DEFAULT_CGI_VARS;
}
equal = strchr(form_output, '=');
if (equal == NULL) {
return NULL;
}
ampersand = strchr(equal, '&');
if (ampersand == NULL) {
return NULL;
}
equal[0] = '\0';
if (ampersand != NULL) {
ampersand[0] = '\0';
}
var = malloc(sizeof(CGIVariable));
var->name = form_output;
var->value = &equal[1];
varTable->variables[varTable->numVars] = var;
varTable->numVars++;
processVariable(var);
return (ampersand != NULL) ? &ampersand[1] : NULL;
}
void
ParseInputVariables(CGIVarTable *varTable, char *form_output)
{
varTable->variables = malloc(sizeof(CGIVariable*)*DEFAULT_CGI_VARS);
varTable->numVars = 0;
varTable->numAlloc = DEFAULT_CGI_VARS;
while (form_output && form_output[0] != '\0') {
form_output = parseNextVariable(varTable, form_output);
}
}
const char *
CGITableFindValue(CGIVarTable *varTable, const char *key)
{
const char *retVal = NULL;
int i;
for (i=0; i<varTable->numVars; i++) {
if (strcmp(varTable->variables[i]->name, key) == 0) {
retVal = varTable->variables[i]->value;
break;
}
}
return retVal;
}
char*
passwordCallback(PK11SlotInfo *slot, PRBool retry, void *arg)
{
const char *passwd;
if (retry) {
return NULL;
}
passwd = CGITableFindValue((CGIVarTable*)arg, "dbPassword");
if (passwd == NULL) {
return NULL;
}
return PORT_Strdup(passwd);
}
ErrorCode
initNSS(CGIVarTable *varTable)
{
const char *nssDir;
PK11SlotInfo *keySlot;
SECStatus rv;
nssDir = CGITableFindValue(varTable,"NSSDirectory");
if (nssDir == NULL) {
missingVar = "NSSDirectory";
return REQ_CGI_VAR_NOT_PRESENT;
}
rv = NSS_Init(nssDir);
if (rv != SECSuccess) {
return NSS_INIT_FAILED;
}
PK11_SetPasswordFunc(passwordCallback);
keySlot = PK11_GetInternalKeySlot();
rv = PK11_Authenticate(keySlot, PR_FALSE, varTable);
if (rv != SECSuccess) {
return AUTH_FAILED;
}
return NO_ERROR;
}
void
dumpErrorMessage(ErrorCode errNum)
{
spitOutHeaders();
printf("<html><head><title>Error</title></head><body><h1>Error processing "
"data</h1> Received the error %d<p>", errNum);
if (errNum == REQ_CGI_VAR_NOT_PRESENT) {
printf ("The missing variable is %s.", missingVar);
}
printf ("<i>More useful information here in the future.</i></body></html>");
}
ErrorCode
initOldCertReq(CERTCertificateRequest *oldCertReq,
CERTName *subject, CERTSubjectPublicKeyInfo *spki)
{
PRArenaPool *poolp;
poolp = oldCertReq->arena = PORT_NewArena(DER_DEFAULT_CHUNKSIZE);
SEC_ASN1EncodeInteger(poolp, &oldCertReq->version,
SEC_CERTIFICATE_VERSION_3);
CERT_CopyName(poolp, &oldCertReq->subject, subject);
SECKEY_CopySubjectPublicKeyInfo(poolp, &oldCertReq->subjectPublicKeyInfo,
spki);
oldCertReq->attributes = NULL;
return NO_ERROR;
}
ErrorCode
addExtensions(CERTCertificate *newCert, CRMFCertRequest *certReq)
{
int numExtensions, i;
void *extHandle;
ErrorCode rv = NO_ERROR;
CRMFCertExtension *ext;
SECStatus srv;
numExtensions = CRMF_CertRequestGetNumberOfExtensions(certReq);
if (numExtensions == 0) {
/* No extensions to add */
return NO_ERROR;
}
extHandle = CERT_StartCertExtensions(newCert);
if (extHandle == NULL) {
rv = COULD_NOT_START_EXTENSIONS;
goto loser;
}
for (i=0; i<numExtensions; i++) {
ext = CRMF_CertRequestGetExtensionAtIndex(certReq, i);
if (ext == NULL) {
rv = ERROR_RETRIEVING_EXT_FROM_REQ;
}
srv = CERT_AddExtension(extHandle, CRMF_CertExtensionGetOidTag(ext),
CRMF_CertExtensionGetValue(ext),
CRMF_CertExtensionGetIsCritical(ext), PR_FALSE);
if (srv != SECSuccess) {
rv = ERROR_ADDING_EXT_TO_CERT;
}
}
srv = CERT_FinishExtensions(extHandle);
if (srv != SECSuccess) {
rv = ERROR_ENDING_EXTENSIONS;
goto loser;
}
return NO_ERROR;
loser:
return rv;
}
void
writeOutItem(const char *filePath, SECItem *der)
{
PRFileDesc *outfile;
outfile = PR_Open (filePath,
PR_WRONLY | PR_CREATE_FILE | PR_TRUNCATE,
0666);
PR_Write(outfile, der->data, der->len);
PR_Close(outfile);
}
ErrorCode
createNewCert(CERTCertificate**issuedCert,CERTCertificateRequest *oldCertReq,
CRMFCertReqMsg *currReq, CRMFCertRequest *certReq,
CERTCertificate *issuerCert, CGIVarTable *varTable)
{
CERTCertificate *newCert = NULL;
CERTValidity *validity;
PRExplodedTime printableTime;
PRTime now, after;
ErrorCode rv=NO_ERROR;
SECKEYPrivateKey *issuerPrivKey;
SECItem derCert = { 0 };
SECOidTag signTag;
SECStatus srv;
long version;
now = PR_Now();
PR_ExplodeTime(now, PR_GMTParameters, &printableTime);
printableTime.tm_month += 9;
after = PR_ImplodeTime(&printableTime);
validity = CERT_CreateValidity(now, after);
newCert = *issuedCert =
CERT_CreateCertificate(rand(), &(issuerCert->subject), validity,
oldCertReq);
if (newCert == NULL) {
rv = ERROR_CREATING_NEW_CERTIFICATE;
goto loser;
}
rv = addExtensions(newCert, certReq);
if (rv != NO_ERROR) {
goto loser;
}
issuerPrivKey = PK11_FindKeyByAnyCert(issuerCert, varTable);
if (issuerPrivKey == NULL) {
rv = COULD_NOT_FIND_ISSUER_PRIVATE_KEY;
}
switch(issuerPrivKey->keyType) {
case rsaKey:
signTag = SEC_OID_PKCS1_MD5_WITH_RSA_ENCRYPTION;
break;
case dsaKey:
signTag = SEC_OID_ANSIX9_DSA_SIGNATURE_WITH_SHA1_DIGEST;
break;
default:
rv = UNSUPPORTED_SIGN_OPERATION_FOR_ISSUER;
goto loser;
}
srv = SECOID_SetAlgorithmID(newCert->arena, &newCert->signature,
signTag, 0);
if (srv != SECSuccess) {
rv = ERROR_SETTING_SIGN_ALG;
goto loser;
}
srv = CRMF_CertRequestGetCertTemplateVersion(certReq, &version);
if (srv != SECSuccess) {
/* No version included in the request */
*(newCert->version.data) = SEC_CERTIFICATE_VERSION_3;
} else {
SECITEM_FreeItem(&newCert->version, PR_FALSE);
SEC_ASN1EncodeInteger(newCert->arena, &newCert->version, version);
}
SEC_ASN1EncodeItem(newCert->arena, &derCert, newCert,
CERT_CertificateTemplate);
if (derCert.data == NULL) {
rv = ERROR_ENCODING_NEW_CERT;
goto loser;
}
srv = SEC_DerSignData(newCert->arena, &(newCert->derCert), derCert.data,
derCert.len, issuerPrivKey, signTag);
if (srv != SECSuccess) {
rv = ERROR_SIGNING_NEW_CERT;
goto loser;
}
#ifdef WRITE_OUT_RESPONSE
writeOutItem("newcert.der", &newCert->derCert);
#endif
return NO_ERROR;
loser:
*issuedCert = NULL;
if (newCert) {
CERT_DestroyCertificate(newCert);
}
return rv;
}
void
formatCMMFResponse(char *nickname, char *base64Response)
{
char *currLine, *nextLine;
printf("var retVal = crypto.importUserCertificates(\"%s\",\n", nickname);
currLine = base64Response;
while (1) {
nextLine = strchr(currLine, '\n');
if (nextLine == NULL) {
/* print out the last line here. */
printf ("\"%s\",\n", currLine);
break;
}
nextLine[0] = '\0';
printf("\"%s\\n\"+\n", currLine);
currLine = nextLine+1;
}
printf("true);\n"
"if(retVal == '') {\n"
"\tdocument.write(\"<h1>New Certificate Succesfully Imported.</h1>\");\n"
"} else {\n"
"\tdocument.write(\"<h2>Unable to import New Certificate</h2>\");\n"
"\tdocument.write(\"crypto.importUserCertificates returned <b>\");\n"
"\tdocument.write(retVal);\n"
"\tdocument.write(\"</b>\");\n"
"}\n");
}
void
spitOutCMMFResponse(char *nickname, char *base64Response)
{
spitOutHeaders();
printf("<html>\n<head>\n<title>CMMF Resonse Page</title>\n</head>\n\n"
"<body><h1>CMMF Response Page</h1>\n"
"<script language=\"JavaScript\">\n"
"<!--\n");
formatCMMFResponse(nickname, base64Response);
printf("// -->\n"
"</script>\n</body>\n</html>");
}
char*
getNickname(CERTCertificate *cert)
{
char *nickname;
if (cert->nickname != NULL) {
return cert->nickname;
}
nickname = CERT_GetCommonName(&cert->subject);
if (nickname != NULL) {
return nickname;
}
return CERT_NameToAscii(&cert->subject);
}
ErrorCode
createCMMFResponse(CertResponseInfo *issuedCerts, int numCerts,
CERTCertificate *issuerCert, char **base64der)
{
CMMFCertRepContent *certRepContent=NULL;
ErrorCode rv = NO_ERROR;
CMMFCertResponse **responses, *currResponse;
CERTCertList *caList;
int i;
SECStatus srv;
PRArenaPool *poolp;
SECItem *der;
certRepContent = CMMF_CreateCertRepContent();
if (certRepContent == NULL) {
rv = ERROR_CREATING_CERT_REP_CONTENT;
goto loser;
}
responses = PORT_NewArray(CMMFCertResponse*, numCerts);
if (responses == NULL) {
rv = OUT_OF_MEMORY;
goto loser;
}
for (i=0; i<numCerts;i++) {
responses[i] = currResponse =
CMMF_CreateCertResponse(issuedCerts[i].certReqID);
if (currResponse == NULL) {
rv = ERROR_CREATING_SINGLE_CERT_RESPONSE;
goto loser;
}
CMMF_CertResponseSetPKIStatusInfoStatus(currResponse, cmmfGranted);
CMMF_CertResponseSetCertificate(currResponse, issuedCerts[i].cert);
}
srv = CMMF_CertRepContentSetCertResponses(certRepContent, responses,
numCerts);
if (srv != SECSuccess) {
rv = ERROR_SETTING_CERT_RESPONSES;
goto loser;
}
caList = CERT_NewCertList();
if (caList == NULL) {
rv = ERROR_CREATING_CA_LIST;
goto loser;
}
srv = CERT_AddCertToListTail(caList, issuerCert);
if (srv != SECSuccess) {
rv = ERROR_ADDING_ISSUER_TO_CA_LIST;
goto loser;
}
srv = CMMF_CertRepContentSetCAPubs(certRepContent, caList);
CERT_DestroyCertList(caList);
poolp = PORT_NewArena(1024);
der = SEC_ASN1EncodeItem(poolp, NULL, certRepContent,
CMMFCertRepContentTemplate);
if (der == NULL) {
rv = ERROR_ENCODING_CERT_REP_CONTENT;
goto loser;
}
#ifdef WRITE_OUT_RESPONSE
writeOutItem("CertRepContent.der", der);
#endif
*base64der = BTOA_DataToAscii(der->data, der->len);
return NO_ERROR;
loser:
return rv;
}
ErrorCode
issueCerts(CertResponseInfo *issuedCerts, int numCerts,
CERTCertificate *issuerCert)
{
ErrorCode rv;
char *base64Response;
rv = createCMMFResponse(issuedCerts, numCerts, issuerCert, &base64Response);
if (rv != NO_ERROR) {
goto loser;
}
spitOutCMMFResponse(getNickname(issuedCerts[0].cert),base64Response);
return NO_ERROR;
loser:
return rv;
}
ErrorCode
verifySignature(CGIVarTable *varTable, CRMFCertReqMsg *currReq,
CRMFCertRequest *certReq, CERTCertificate *newCert)
{
SECStatus srv;
ErrorCode rv = NO_ERROR;
CRMFPOPOSigningKey *signKey = NULL;
SECAlgorithmID *algID = NULL;
SECItem *signature = NULL;
SECKEYPublicKey *pubKey = NULL;
SECItem *reqDER = NULL;
srv = CRMF_CertReqMsgGetPOPOSigningKey(currReq, &signKey);
if (srv != SECSuccess || signKey == NULL) {
rv = ERROR_RETRIEVING_POP_SIGN_KEY;
goto loser;
}
algID = CRMF_POPOSigningKeyGetAlgID(signKey);
if (algID == NULL) {
rv = ERROR_RETRIEVING_ALG_ID_FROM_SIGN_KEY;
goto loser;
}
signature = CRMF_POPOSigningKeyGetSignature(signKey);
if (signature == NULL) {
rv = ERROR_RETRIEVING_SIGNATURE_FROM_POP_SIGN_KEY;
goto loser;
}
/* Make the length the number of bytes instead of bits */
signature->len = (signature->len+7)/8;
pubKey = CERT_ExtractPublicKey(newCert);
if (pubKey == NULL) {
rv = ERROR_RETRIEVING_PUB_KEY_FROM_NEW_CERT;
goto loser;
}
reqDER = SEC_ASN1EncodeItem(NULL, NULL, certReq, CRMFCertRequestTemplate);
if (reqDER == NULL) {
rv = ERROR_ENCODING_CERT_REQ_FOR_POP;
goto loser;
}
srv = VFY_VerifyData(reqDER->data, reqDER->len, pubKey, signature,
SECOID_FindOIDTag(&algID->algorithm), varTable);
if (srv != SECSuccess) {
rv = ERROR_VERIFYING_SIGNATURE_POP;
goto loser;
}
/* Fall thru in successfull case. */
loser:
if (pubKey != NULL) {
SECKEY_DestroyPublicKey(pubKey);
}
if (reqDER != NULL) {
SECITEM_FreeItem(reqDER, PR_TRUE);
}
if (signature != NULL) {
SECITEM_FreeItem(signature, PR_TRUE);
}
if (algID != NULL) {
SECOID_DestroyAlgorithmID(algID, PR_TRUE);
}
if (signKey != NULL) {
CRMF_DestroyPOPOSigningKey(signKey);
}
return rv;
}
ErrorCode
doChallengeResponse(CGIVarTable *varTable, CRMFCertReqMsg *currReq,
CRMFCertRequest *certReq, CERTCertificate *newCert,
ChallengeCreationInfo *challs, int *numChall)
{
CRMFPOPOPrivKey *privKey = NULL;
CRMFPOPOPrivKeyChoice privKeyChoice;
SECStatus srv;
ErrorCode rv = NO_ERROR;
srv = CRMF_CertReqMsgGetPOPKeyEncipherment(currReq, &privKey);
if (srv != SECSuccess || privKey == NULL) {
rv = ERROR_GETTING_KEY_ENCIPHERMENT;
goto loser;
}
privKeyChoice = CRMF_POPOPrivKeyGetChoice(privKey);
CRMF_DestroyPOPOPrivKey(privKey);
switch (privKeyChoice) {
case crmfSubsequentMessage:
challs = &challs[*numChall];
challs->random = rand();
challs->pubKey = CERT_ExtractPublicKey(newCert);
if (challs->pubKey == NULL) {
rv = ERROR_RETRIEVING_PUB_KEY_FOR_CHALL;
goto loser;
}
(*numChall)++;
rv = DO_CHALLENGE_RESPONSE;
break;
case crmfThisMessage:
/* There'd better be a PKIArchiveControl in this message */
if (!CRMF_CertRequestIsControlPresent(certReq,
crmfPKIArchiveOptionsControl)) {
rv = ERROR_NO_POP_FOR_PRIVKEY;
goto loser;
}
break;
default:
rv = ERROR_UNSUPPORTED_POPOPRIVKEY_TYPE;
goto loser;
}
loser:
return rv;
}
ErrorCode
doProofOfPossession(CGIVarTable *varTable, CRMFCertReqMsg *currReq,
CRMFCertRequest *certReq, CERTCertificate *newCert,
ChallengeCreationInfo *challs, int *numChall)
{
CRMFPOPChoice popChoice;
ErrorCode rv = NO_ERROR;
popChoice = CRMF_CertReqMsgGetPOPType(currReq);
if (popChoice == crmfNoPOPChoice) {
rv = NO_POP_FOR_REQUEST;
goto loser;
}
switch (popChoice) {
case crmfSignature:
rv = verifySignature(varTable, currReq, certReq, newCert);
break;
case crmfKeyEncipherment:
rv = doChallengeResponse(varTable, currReq, certReq, newCert,
challs, numChall);
break;
case crmfRAVerified:
case crmfKeyAgreement:
default:
rv = UNSUPPORTED_POP;
goto loser;
}
loser:
return rv;
}
void
convertB64ToJS(char *base64)
{
int i;
for (i=0; base64[i] != '\0'; i++) {
if (base64[i] == '\n') {
printf ("\\n");
}else {
printf ("%c", base64[i]);
}
}
}
void
formatChallenge(char *chall64, char *certRepContentDER,
ChallengeCreationInfo *challInfo, int numChalls)
{
printf ("function respondToChallenge() {\n"
" var chalForm = document.chalForm;\n\n"
" chalForm.CertRepContent.value = '");
convertB64ToJS(certRepContentDER);
printf ("';\n"
" chalForm.ChallResponse.value = crypto.popChallengeResponse('");
convertB64ToJS(chall64);
printf("');\n"
" chalForm.submit();\n"
"}\n");
}
void
spitOutChallenge(char *chall64, char *certRepContentDER,
ChallengeCreationInfo *challInfo, int numChalls,
char *nickname)
{
int i;
spitOutHeaders();
printf("<html>\n"
"<head>\n"
"<title>Challenge Page</title>\n"
"<script language=\"JavaScript\">\n"
"<!--\n");
/* The JavaScript function actually gets defined within
* this function call
*/
formatChallenge(chall64, certRepContentDER, challInfo, numChalls);
printf("// -->\n"
"</script>\n"
"</head>\n"
"<body onLoad='respondToChallenge()'>\n"
"<h1>Cartman is now responding to the Challenge "
"presented by the CGI</h1>\n"
"<form action='crmfcgi' method='post' name='chalForm'>\n"
"<input type='hidden' name=CertRepContent value=''>\n"
"<input type='hidden' name=ChallResponse value=''>\n");
for (i=0;i<numChalls; i++) {
printf("<input type='hidden' name='chal%d' value='%d'>\n",
i+1, challInfo[i].random);
}
printf("<input type='hidden' name='nickname' value='%s'>\n", nickname);
printf("</form>\n</body>\n</html>");
}
ErrorCode
issueChallenge(CertResponseInfo *issuedCerts, int numCerts,
ChallengeCreationInfo *challInfo, int numChalls,
CERTCertificate *issuer, CGIVarTable *varTable)
{
ErrorCode rv = NO_ERROR;
CMMFPOPODecKeyChallContent *chalContent = NULL;
int i;
SECStatus srv;
PRArenaPool *poolp;
CERTGeneralName *genName;
SECItem *challDER = NULL;
char *chall64, *certRepContentDER;
rv = createCMMFResponse(issuedCerts, numCerts, issuer,
&certRepContentDER);
if (rv != NO_ERROR) {
goto loser;
}
chalContent = CMMF_CreatePOPODecKeyChallContent();
if (chalContent == NULL) {
rv = ERROR_CREATING_EMPTY_CHAL_CONTENT;
goto loser;
}
poolp = PORT_NewArena(1024);
if (poolp == NULL) {
rv = OUT_OF_MEMORY;
goto loser;
}
genName = CERT_GetCertificateNames(issuer, poolp);
if (genName == NULL) {
rv = ERROR_EXTRACTING_GEN_NAME_FROM_ISSUER;
goto loser;
}
for (i=0;i<numChalls;i++) {
srv = CMMF_POPODecKeyChallContentSetNextChallenge(chalContent,
challInfo[i].random,
genName,
challInfo[i].pubKey,
varTable);
SECKEY_DestroyPublicKey(challInfo[i].pubKey);
if (srv != SECSuccess) {
rv = ERROR_SETTING_CHALLENGE;
goto loser;
}
}
challDER = SEC_ASN1EncodeItem(NULL, NULL, chalContent,
CMMFPOPODecKeyChallContentTemplate);
if (challDER == NULL) {
rv = ERROR_ENCODING_CHALL;
goto loser;
}
chall64 = BTOA_DataToAscii(challDER->data, challDER->len);
SECITEM_FreeItem(challDER, PR_TRUE);
if (chall64 == NULL) {
rv = ERROR_CONVERTING_CHALL_TO_BASE64;
goto loser;
}
spitOutChallenge(chall64, certRepContentDER, challInfo, numChalls,
getNickname(issuedCerts[0].cert));
loser:
return rv;
}
ErrorCode
processRequest(CGIVarTable *varTable)
{
CERTCertDBHandle *certdb;
SECKEYKeyDBHandle *keydb;
CRMFCertReqMessages *certReqs = NULL;
const char *crmfReq;
const char *caNickname;
CERTCertificate *caCert = NULL;
CertResponseInfo *issuedCerts = NULL;
CERTSubjectPublicKeyInfo spki = { 0 };
ErrorCode rv=NO_ERROR;
PRBool doChallengeResponse = PR_FALSE;
SECItem der = { 0 };
SECStatus srv;
CERTCertificateRequest oldCertReq = { 0 };
CRMFCertReqMsg **reqMsgs = NULL,*currReq = NULL;
CRMFCertRequest **reqs = NULL, *certReq = NULL;
CERTName subject = { 0 };
int numReqs,i;
ChallengeCreationInfo *challInfo=NULL;
int numChalls = 0;
certdb = CERT_GetDefaultCertDB();
keydb = SECKEY_GetDefaultKeyDB();
crmfReq = CGITableFindValue(varTable, "CRMFRequest");
if (crmfReq == NULL) {
rv = CGI_VAR_MISSING;
missingVar = "CRMFRequest";
goto loser;
}
caNickname = CGITableFindValue(varTable, "CANickname");
if (caNickname == NULL) {
rv = CGI_VAR_MISSING;
missingVar = "CANickname";
goto loser;
}
caCert = CERT_FindCertByNickname(certdb, caNickname);
if (caCert == NULL) {
rv = COULD_NOT_FIND_CA;
goto loser;
}
srv = ATOB_ConvertAsciiToItem(&der, crmfReq);
if (srv != SECSuccess) {
rv = BAD_ASCII_FOR_REQ;
goto loser;
}
certReqs = CRMF_CreateCertReqMessagesFromDER(der.data, der.len);
SECITEM_FreeItem(&der, PR_FALSE);
if (certReqs == NULL) {
rv = COULD_NOT_DECODE_REQS;
goto loser;
}
numReqs = CRMF_CertReqMessagesGetNumMessages(certReqs);
issuedCerts = PORT_ZNewArray(CertResponseInfo, numReqs);
challInfo = PORT_ZNewArray(ChallengeCreationInfo, numReqs);
if (issuedCerts == NULL || challInfo == NULL) {
rv = OUT_OF_MEMORY;
goto loser;
}
reqMsgs = PORT_ZNewArray(CRMFCertReqMsg*, numReqs);
reqs = PORT_ZNewArray(CRMFCertRequest*, numReqs);
if (reqMsgs == NULL || reqs == NULL) {
rv = OUT_OF_MEMORY;
goto loser;
}
for (i=0; i<numReqs; i++) {
currReq = reqMsgs[i] =
CRMF_CertReqMessagesGetCertReqMsgAtIndex(certReqs, i);
if (currReq == NULL) {
rv = ERROR_RETRIEVING_REQUEST_MSG;
goto loser;
}
certReq = reqs[i] = CRMF_CertReqMsgGetCertRequest(currReq);
if (certReq == NULL) {
rv = ERROR_RETRIEVING_CERT_REQUEST;
goto loser;
}
srv = CRMF_CertRequestGetCertTemplateSubject(certReq, &subject);
if (srv != SECSuccess) {
rv = ERROR_RETRIEVING_SUBJECT_FROM_REQ;
goto loser;
}
srv = CRMF_CertRequestGetCertTemplatePublicKey(certReq, &spki);
if (srv != SECSuccess) {
rv = ERROR_RETRIEVING_PUBLIC_KEY_FROM_REQ;
goto loser;
}
rv = initOldCertReq(&oldCertReq, &subject, &spki);
if (rv != NO_ERROR) {
goto loser;
}
rv = createNewCert(&issuedCerts[i].cert, &oldCertReq, currReq, certReq,
caCert, varTable);
if (rv != NO_ERROR) {
goto loser;
}
rv = doProofOfPossession(varTable, currReq, certReq, issuedCerts[i].cert,
challInfo, &numChalls);
if (rv != NO_ERROR) {
if (rv == DO_CHALLENGE_RESPONSE) {
doChallengeResponse = PR_TRUE;
} else {
goto loser;
}
}
CRMF_CertReqMsgGetID(currReq, &issuedCerts[i].certReqID);
CRMF_DestroyCertReqMsg(currReq);
CRMF_DestroyCertRequest(certReq);
}
if (doChallengeResponse) {
rv = issueChallenge(issuedCerts, numReqs, challInfo, numChalls, caCert,
varTable);
} else {
rv = issueCerts(issuedCerts, numReqs, caCert);
}
loser:
if (certReqs != NULL) {
CRMF_DestroyCertReqMessages(certReqs);
}
return rv;
}
ErrorCode
processChallengeResponse(CGIVarTable *varTable, const char *certRepContent)
{
SECItem binDER = { 0 };
SECStatus srv;
ErrorCode rv = NO_ERROR;
const char *clientResponse;
const char *formChalValue;
const char *nickname;
CMMFPOPODecKeyRespContent *respContent = NULL;
int numResponses,i;
long curResponse, expectedResponse;
char cgiChalVar[10];
#ifdef WRITE_OUT_RESPONSE
SECItem certRepBinDER = { 0 };
ATOB_ConvertAsciiToItem(&certRepBinDER, certRepContent);
writeOutItem("challCertRepContent.der", &certRepBinDER);
PORT_Free(certRepBinDER.data);
#endif
clientResponse = CGITableFindValue(varTable, "ChallResponse");
if (clientResponse == NULL) {
rv = REQ_CGI_VAR_NOT_PRESENT;
missingVar = "ChallResponse";
goto loser;
}
srv = ATOB_ConvertAsciiToItem(&binDER, clientResponse);
if (srv != SECSuccess) {
rv = ERROR_CONVERTING_RESP_FROM_CHALL_TO_BIN;
goto loser;
}
respContent = CMMF_CreatePOPODecKeyRespContentFromDER(binDER.data,
binDER.len);
SECITEM_FreeItem(&binDER, PR_FALSE);
binDER.data = NULL;
if (respContent == NULL) {
rv = ERROR_CREATING_KEY_RESP_FROM_DER;
goto loser;
}
numResponses = CMMF_POPODecKeyRespContentGetNumResponses(respContent);
for (i=0;i<numResponses;i++){
srv = CMMF_POPODecKeyRespContentGetResponse(respContent,i,&curResponse);
if (srv != SECSuccess) {
rv = ERROR_RETRIEVING_CLIENT_RESPONSE_TO_CHALLENGE;
goto loser;
}
sprintf(cgiChalVar, "chal%d", i+1);
formChalValue = CGITableFindValue(varTable, cgiChalVar);
if (formChalValue == NULL) {
rv = REQ_CGI_VAR_NOT_PRESENT;
missingVar = strdup(cgiChalVar);
goto loser;
}
sscanf(formChalValue, "%ld", &expectedResponse);
if (expectedResponse != curResponse) {
rv = ERROR_RETURNED_CHALL_NOT_VALUE_EXPECTED;
goto loser;
}
}
nickname = CGITableFindValue(varTable, "nickname");
if (nickname == NULL) {
rv = REQ_CGI_VAR_NOT_PRESENT;
missingVar = "nickname";
goto loser;
}
spitOutCMMFResponse(nickname, certRepContent);
loser:
if (respContent != NULL) {
CMMF_DestroyPOPODecKeyRespContent(respContent);
}
return rv;
}
int
main()
{
char *form_output = NULL;
int form_output_len, form_output_used;
CGIVarTable varTable = { 0 };
ErrorCode errNum = 0;
char *certRepContent;
#ifdef ATTACH_CGI
/* Put an ifinite loop in here so I can attach to
* the process after the process is spun off
*/
{ int stupid = 1;
while (stupid);
}
#endif
form_output_used = 0;
srand(time(NULL));
while (feof(stdin) == 0) {
if (form_output == NULL) {
form_output = PORT_NewArray(char, DEFAULT_ALLOC_SIZE+1);
form_output_len = DEFAULT_ALLOC_SIZE;
} else if ((form_output_used + DEFAULT_ALLOC_SIZE) >= form_output_len) {
form_output_len += DEFAULT_ALLOC_SIZE;
form_output = PORT_Realloc(form_output, form_output_len+1);
}
form_output_used += fread(&form_output[form_output_used], sizeof(char),
DEFAULT_ALLOC_SIZE, stdin);
}
ParseInputVariables(&varTable, form_output);
certRepContent = CGITableFindValue(&varTable, "CertRepContent");
if (certRepContent == NULL) {
errNum = initNSS(&varTable);
if (errNum != 0) {
goto loser;
}
errNum = processRequest(&varTable);
} else {
errNum = processChallengeResponse(&varTable, certRepContent);
}
if (errNum != NO_ERROR) {
goto loser;
}
goto done;
loser:
dumpErrorMessage(errNum);
done:
free (form_output);
return 0;
}
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