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/*
* The contents of this file are subject to the AOLserver 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://aolserver.com/.
*
* 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 AOLserver Code and related documentation
* distributed by AOL.
*
* The Initial Developer of the Original Code is America Online,
* Inc. Portions created by AOL are Copyright (C) 1999 America Online,
* Inc. All Rights Reserved.
*
* Alternatively, the contents of this file may be used under the terms
* of the GNU General Public License (the "GPL"), in which case the
* provisions of 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
* License, 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 License or the GPL.
*/
/*
* EXPORT NOTICE
*
* This source code is subject to the U.S. Export Administration
* Regulations and other U.S. law, and may not be exported or
* re-exported to certain countries (currently Afghanistan
* (Taliban-controlled areas), Cuba, Iran, Iraq, Libya, North Korea,
* Serbia (except Kosovo), Sudan and Syria) or to persons or entities
* prohibited from receiving U.S. exports (including Denied Parties,
* Specially Designated Nationals, and entities on the Bureau of
* Export Administration Entity List).
*/
/*
* ssltcl.c --
*
* Tcl bindings for various nsssl commands.
*
* Note: This has three entry points -- one for nsd's loader and
* two for the loader in the Tcl interpreter used by keygen.tcl.
*
*/
static const char *RCSID = "@(#): $Header: /cvsroot/aolserver/aolserver/nsssl/ssltcl.c,v 1.1 2001/04/23 21:06:01 jgdavidson Exp $, compiled: " __DATE__ " " __TIME__;
#include "ns.h"
#include "ssl.h"
#include "ssltcl.h"
#include "x509.h"
#include <sys/stat.h>
/*
* Private function prototypes
*/
static int
InitCommands(Tcl_Interp *interp);
static void *
SslReadFile(char *filename, int *length);
static int
SslWriteFile(char *filename, void *data, int length);
static int
OctetStringDecode(Ns_DString *ds, char *s);
static void
OctetStringEncode(Ns_DString *ds, char *data, int length);
static void
BitStringEncode(Ns_DString *ds, unsigned char *data, int lengthInBits);
/*
* Tcl commands
*/
static Tcl_CmdProc DerDecodeCmd;
static Tcl_CmdProc DerEncodeCmd;
static Tcl_CmdProc OctetStringCmd;
static Tcl_CmdProc RsaKeyCmd;
static Tcl_CmdProc SignatureCmd;
static Tcl_CmdProc EncryptCmd;
static Tcl_CmdProc DecryptCmd;
static Tcl_CmdProc DigestCmd;
static Tcl_CmdProc InfoCmd;
/*
* Static variables
*/
/* None at this time. */
/*
* Public API functions
*/
/* None at this time. */
/*
* Exported functions
*/
/*
*----------------------------------------------------------------------
*
* Nsssle_Init -- ***EXPORT VERSION***
*
* Entry point for stand-alone mode (nsssle.so export version).
*
* Results:
* NS_OK
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
int
Nsssle_Init(Tcl_Interp *interp)
{
#ifdef SSL_EXPORT
Ns_Log(Notice, "nsssl: "
"40-bit export encryption version starting in stand-alone mode");
InitCommands(interp);
return TCL_OK;
#else
Ns_Log(Fatal, "nsssl: "
"128-bit domestic encryption not supported by this module");
return TCL_ERROR;
#endif
}
/*
*----------------------------------------------------------------------
*
* Nsssl_Init -- ***DOMESTIC VERSION***
*
* Entry point for stand-alone mode (nsssl.so domestic version).
*
* Results:
* NS_OK
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
int
Nsssl_Init(Tcl_Interp *interp)
{
#ifdef SSL_EXPORT
Ns_Log(Fatal, "nsssl: "
"40-bit export encryption not supported by this module");
return TCL_ERROR;
#else
Ns_Log(Notice, "nsssl: "
"128-bit domestic encryption version starting in stand-alone mode");
InitCommands(interp);
return TCL_OK;
#endif
}
/*
*----------------------------------------------------------------------
*
* NsSSLInterpInit
*
* Add Tcl commands for SSL functions.
*
* Note: This is called in normal (non-stand-alone) mode.
*
* Results:
* NS_OK
*
* Side effects:
* Adds Tcl commands to the interp.
*
*----------------------------------------------------------------------
*/
int
NsSSLInterpInit(Tcl_Interp *interp, void *ignored)
{
Tcl_CreateCommand(interp, "ssl_info", InfoCmd,
NULL, NULL);
return NS_OK;
}
/*
* Private functions
*/
/*
*----------------------------------------------------------------------
*
* InitCommands
*
* Add Tcl commands for SSL functions used by keygen.tcl
*
* Note: This is called in stand-alone mode.
*
* Results:
* NS_OK
*
* Side effects:
* Adds Tcl commands to the interp.
*
*----------------------------------------------------------------------
*/
static int
InitCommands(Tcl_Interp *interp)
{
if (NsSSLInitialize(NULL, NULL) != NS_OK) {
Ns_Log(Error, "nsssl: failed to initialize nsssl in stand-alone mode");
return TCL_ERROR;
}
Tcl_CreateCommand(interp, "osi_der_decode",
DerDecodeCmd, NULL, NULL);
Tcl_CreateCommand(interp, "osi_der_encode",
DerEncodeCmd, NULL, NULL);
Tcl_CreateCommand(interp, "osi_octet_string",
OctetStringCmd, NULL, NULL);
Tcl_CreateCommand(interp, "ssl_rsa_key",
RsaKeyCmd, NULL, NULL);
Tcl_CreateCommand(interp, "ssl_signature",
SignatureCmd, NULL, NULL);
Tcl_CreateCommand(interp, "ssl_encrypt",
EncryptCmd, NULL, NULL);
Tcl_CreateCommand(interp, "ssl_decrypt",
DecryptCmd, NULL, NULL);
Tcl_CreateCommand(interp, "ssl_digest",
DigestCmd, NULL, NULL);
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* SslReadFile
*
* Returns the file as a block of allocated memory.
*
* Results:
* Sets length to bytes read.
* Returns NULL on error or a pointer to the block otherwise.
*
* Side effects:
* Allocates memory.
*
*----------------------------------------------------------------------
*/
static void *
SslReadFile(char *filename, int *length)
{
FILE *fp;
void *data;
int err;
data = NULL;
fp = NULL;
err = 1;
do {
struct stat st;
if (stat(filename, &st) != 0) {
break;
}
*length = st.st_size;
data = ckalloc(*length);
fp = fopen(filename, "rb");
if (fp == NULL) {
break;
}
if (fread(data, 1, *length, fp) != (size_t) *length) {
break;
}
err = 0;
} while(0);
if (fp != NULL) {
fclose(fp);
}
if ((err) && (data != NULL)) {
ckfree(data);
data = NULL;
}
return data;
}
/*
*----------------------------------------------------------------------
*
* SslWriteFile
*
* Write a block of ram to disk.
*
* Results:
* NS_OK or NS_ERROR
*
* Side effects:
* Does *not* free memory.
*
*----------------------------------------------------------------------
*/
static int
SslWriteFile(char *filename, void *data, int length)
{
FILE *fp;
int status;
fp = NULL;
status = NS_ERROR;
do {
fp = fopen(filename, "wb");
if (fp == NULL) {
break;
}
if (fwrite(data, length, 1, fp) == 0) {
break;
}
status = NS_OK;
} while(0);
if (fp != NULL) {
fclose(fp);
}
return status;
}
/*
*----------------------------------------------------------------------
*
* OctetStringDecode
*
* Decodes an octet string
*
* Results:
* NS_OK or NS_ERROR
*
* Side effects:
* The Ns_DString passed in expands.
*
*----------------------------------------------------------------------
*/
static int
OctetStringDecode(Ns_DString *ds, char *s)
{
if (strncasecmp(s, "octet-string ", 13) == 0) {
s += 13;
while ((*s != '\0') &&
isxdigit( (int) *s) &&
(s[1] != '\0') &&
isxdigit( (int) s[1])) {
unsigned int val;
unsigned char c;
sscanf(s, "%02x", &val);
c = val;
Ns_DStringNAppend(ds, (char *) &c, 1);
s += 2;
}
return NS_OK;
} else {
return NS_ERROR;
}
}
/*
*----------------------------------------------------------------------
*
* OctetStringEncode
*
* Encodes data as a proper octet string.
*
* Results:
* Ns_DString to the new octet string.
*
* Side effects:
* The Ns_DString passed in will expand.
*
*----------------------------------------------------------------------
*/
static void
OctetStringEncode(Ns_DString *ds, char *data, int length)
{
Ns_DStringAppend(ds, "OCTET-STRING ");
while (length > 0) {
Ns_DStringPrintf(ds, "%02x", (unsigned char) *data);
data++;
length--;
}
}
/*
*----------------------------------------------------------------------
*
* BitStringEncode
*
* Encodes data as a bit string.
*
* Results:
* Ns_DString to the new octet string.
*
* Side effects:
* The Ns_DString passed in will expand.
*
*----------------------------------------------------------------------
*/
static void
BitStringEncode(Ns_DString *ds, unsigned char *data, int lengthInBits)
{
int paddingBits;
int length;
Ns_DStringAppend(ds, "BIT-STRING ");
paddingBits = 8 - lengthInBits % 8;
length = lengthInBits / 8;
if (paddingBits == 8) {
paddingBits = 0;
} else {
length++;
}
Ns_DStringPrintf(ds, "%02x", paddingBits);
while (length > 0) {
Ns_DStringPrintf(ds, "%02x", *data);
data++;
length--;
}
}
/*
*----------------------------------------------------------------------
*
* DerDecodeCmd --
*
* Tcl command that returns a string in an ASN.1-style format of
* the DER (Distinguished Encoding Rules) object.
*
* Usage:
* DERDecode -option arg
* -file <filename>
* -octets <string containing octec string>
*
* Results:
* Ns_DString to the new DER object.
*
* Side effects:
* The string passed out is TCL_VOLATILE.
*
*----------------------------------------------------------------------
*/
static int
DerDecodeCmd(ClientData dummy, Tcl_Interp *interp, int argc, char **argv)
{
unsigned char *der;
Ns_DString ds;
Ns_DString dsBuf;
int status;
status = TCL_ERROR;
der = NULL;
Ns_DStringInit(&ds);
Ns_DStringInit(&dsBuf);
do {
if (argc != 3) {
Tcl_AppendResult(interp, "wrong # of args: should be \"", argv[0],
" { -file filename | -octets octet-string }\"",
NULL);
break;
}
if (strcasecmp(argv[1], "-file") == 0) {
int length;
der = SslReadFile(argv[2], &length);
if (der == NULL) {
Tcl_AppendResult(interp, "Could not read file '", argv[2],
"'.", NULL);
break;
}
if (DERDecode(&ds, der, length, 0) != NS_OK) {
Tcl_AppendResult(interp, "Could not parse DER.", NULL);
break;
}
Tcl_SetResult(interp, ds.string, TCL_VOLATILE);
} else if (strcasecmp(argv[1], "-octets") == 0) {
if (OctetStringDecode(&dsBuf, argv[2]) != NS_OK) {
Tcl_AppendResult(interp, "Could not parse OCTET-STRING.",
NULL);
break;
}
if (DERDecode(&ds, (unsigned char *) dsBuf.string,
dsBuf.length, 0) != NS_OK) {
Tcl_AppendResult(interp, "Could not parse DER.", NULL);
break;
}
Tcl_SetResult(interp, ds.string, TCL_VOLATILE);
} else {
Tcl_AppendResult(interp, "usage: \"", argv[0],
" { -file filename | -octets octets }\"", NULL);
break;
}
status = TCL_OK;
} while (0);
if (der != NULL) {
ns_free(der);
}
Ns_DStringFree(&ds);
Ns_DStringFree(&dsBuf);
return status;
}
/*
*----------------------------------------------------------------------
*
* DerEncodeCmd --
*
* Tcl command that returns an octet string of the the DER
* (Distinguished Encoding Rules) object.
*
* Usage:
* osi_der_encode option arg
* -octets <string containing octec string>
* -isprintablestring <string>
*
* Results:
* Ns_DString to the new DER object.
*
* Side effects:
* The string passed out is TCL_VOLATILE.
*
*----------------------------------------------------------------------
*/
static int
DerEncodeCmd(ClientData dummy, Tcl_Interp *interp, int argc, char **argv)
{
Ns_DString ds;
Ns_DString dsBuf;
int status;
status = TCL_ERROR;
Ns_DStringInit(&ds);
Ns_DStringInit(&dsBuf);
do {
if (argc != 3) {
Tcl_AppendResult(interp, "wrong # of args: should be \"",
argv[0], " option argument\"", NULL);
break;
}
if (strcasecmp(argv[1], "octets") == 0) {
if (DEREncode(&dsBuf, argv[2]) != NS_OK) {
Tcl_AppendResult(interp, "Could not parse ASN.1 data.",
NULL);
break;
}
OctetStringEncode(&ds, dsBuf.string, dsBuf.length);
Tcl_SetResult(interp, ds.string, TCL_VOLATILE);
} else if (strcasecmp(argv[1], "IsPrintableString") == 0) {
char *p;
for (p = argv[2]; *p != '\0'; p++) {
char c = *p;
if (!(((c >= 'A') && (c <= 'Z')) ||
((c >= 'a') && (c <= 'z')) ||
((c >= '0') && (c <= '9')) ||
(strchr(" '()+,-./:=?", c)!=NULL))) {
break;
}
}
if (*p == '\0') {
interp->result = "1";
} else {
interp->result = "0";
}
} else {
Tcl_AppendResult(interp, "usage: \"", argv[0],
" valid options are octets or "
"IsPrintableString\"", NULL);
break;
}
status = TCL_OK;
} while (0);
Ns_DStringFree(&ds);
Ns_DStringFree(&dsBuf);
return status;
}
/*
*----------------------------------------------------------------------
*
* OctetStringCmd
*
* A candy-machine-style command to manipulate octet strings in
* Tcl.
*
* Usage: osi_octet_string command args
*
* commands:
* tostring <string containing octet string>
* converts the octet string into a null terminated text string
* fromstring <string>
* returns the string as an octet string
* read <filename>
* returns the file as an octet string
* write <filename> <string containing octet string>
* writes the contents of the octet string to a file
* frombase64 <string containing data in base64>
* returns the data as an octet string
* tobase64 <string containing octet string>
* converts the octet string into base 64
*
* Results:
* NS_OK or NS_ERROR
*
* Side effects:
* Depends on command -- see x509.c.
*
*---------------------------------------------------------------------- */
static int
OctetStringCmd(ClientData dummy, Tcl_Interp *interp, int argc, char **argv)
{
int status;
Ns_DString ds;
unsigned char *rawBytes;
status = TCL_ERROR;
rawBytes = NULL;
Ns_DStringInit(&ds);
do {
if ((argc != 3) && (argc != 4)) {
Tcl_AppendResult(interp, "wrong # of args: should be \"",
argv[0], " { tostring octets | fromstring string "
"| read filename "
"| write filename octets | frombase64 string "
"| tobase64 octets }\"", NULL);
break;
}
if (strcasecmp(argv[1], "tostring") == 0) {
if (OctetStringDecode(&ds, argv[2]) != NS_OK) {
Tcl_AppendResult(interp, "Could not parse OCTET-STRING.",
NULL);
break;
}
Ns_DStringNAppend(&ds, "\0", 1);
Tcl_SetResult(interp, ds.string, TCL_VOLATILE);
} else if (strcasecmp(argv[1], "fromstring") == 0) {
OctetStringEncode(&ds, argv[2], strlen(argv[2]));
Tcl_SetResult(interp, ds.string, TCL_VOLATILE);
} else if (strcasecmp(argv[1], "read") == 0) {
int length;
rawBytes = SslReadFile(argv[2], &length);
if (rawBytes == NULL) {
Tcl_AppendResult(interp, "Could not read file '", argv[2],
"'.", NULL);
break;
}
OctetStringEncode(&ds, (char *) rawBytes, length);
Tcl_SetResult(interp, ds.string, TCL_VOLATILE);
} else if ((strcasecmp(argv[1], "write") == 0) && (argc == 4)) {
if (OctetStringDecode(&ds, argv[3]) != NS_OK) {
Tcl_AppendResult(interp, "Could not parse OCTET-STRING.",
NULL);
break;
}
if (SslWriteFile(argv[2], ds.string, ds.length) != NS_OK) {
Tcl_AppendResult(interp, "Could not write file '", argv[2],
"'.", NULL);
break;
}
} else if (strcasecmp(argv[1], "frombase64") == 0) {
B_ALGORITHM_OBJ asciiDecoder;
Ns_DString dsBuf;
unsigned int length;
int err;
Ns_DStringInit(&dsBuf);
do {
unsigned char buf[100];
char *src;
err = B_CreateAlgorithmObject(&asciiDecoder);
if (err != 0) {
break;
}
err = B_SetAlgorithmInfo(asciiDecoder, AI_RFC1113Recode, NULL);
if (err != 0) {
break;
}
err = B_DecodeInit(asciiDecoder);
if (err != 0) {
break;
}
src = Ns_StrTrimLeft(argv[2]);
while (*src != '\0') {
char *p;
char c;
p = strpbrk(src, "\r\n");
if (p != NULL) {
c = *p;
*p = '\0';
} else {
c = 0;
p = src+strlen(src);
}
err = B_DecodeUpdate(asciiDecoder, buf, &length,
sizeof(buf), (unsigned char *) src,
p-src);
if (err != 0) {
break;
}
Ns_DStringNAppend(&dsBuf, (char *) buf, length);
if (c != 0) {
*p = c;
src = Ns_StrTrimLeft(p+1);
} else {
src = p;
}
}
if (err != 0) {
break;
}
err = B_DecodeFinal(asciiDecoder, buf, &length, sizeof(buf));
if (err != 0) {
break;
}
if (length > 0) {
Ns_DStringNAppend(&dsBuf, (char *) buf, length);
}
OctetStringEncode(&ds, dsBuf.string, dsBuf.length);
Tcl_SetResult(interp, ds.string, TCL_VOLATILE);
} while(0);
Ns_DStringFree(&dsBuf);
B_DestroyAlgorithmObject(&asciiDecoder);
if (err != 0) {
Ns_Log(Error, "nsssl: 'osi_octet_string frombase64' failed, "
"bsafe error %d", err);
break;
}
} else if (strcasecmp(argv[1], "tobase64") == 0) {
B_ALGORITHM_OBJ asciiEncoder;
Ns_DString dsBuf;
int err;
if (OctetStringDecode(&ds, argv[2]) != NS_OK) {
break;
}
Ns_DStringInit(&dsBuf);
do {
unsigned char buf[100];
char *src;
unsigned int updateLength;
unsigned int len;
err = B_CreateAlgorithmObject(&asciiEncoder);
if (err != 0) {
break;
}
err = B_SetAlgorithmInfo(asciiEncoder, AI_RFC1113Recode, NULL);
if (err != 0) {
break;
}
err = B_EncodeInit(asciiEncoder);
if (err != 0) {
break;
}
src = ds.string;
len = ds.length;
updateLength = 0;
while (len > 0) {
int iToAdd;
iToAdd = len >= 48 ? 48 : len;
err = B_EncodeUpdate(asciiEncoder, buf, &updateLength,
sizeof(buf), (unsigned char *) src,
iToAdd);
if (err != 0) {
break;
}
src += iToAdd;
len -= iToAdd;
if ((updateLength > 0) && (len != 0)) {
/* NAB: I want the last line to get added to final */
buf[updateLength] = '\0';
Ns_DStringAppend(&dsBuf, (char *) buf);
Ns_DStringAppend(&dsBuf, EOLSTRING);
}
}
if (err != 0) {
break;
}
err = B_EncodeFinal(asciiEncoder, buf+updateLength, &len,
sizeof(buf)-updateLength);
if (err != 0) {
break;
}
len += updateLength;
if (len > 0) {
buf[len] = '\0';
Ns_DStringAppend(&dsBuf, (char *) buf);
Ns_DStringAppend(&dsBuf, EOLSTRING);
}
Tcl_SetResult(interp, dsBuf.string, TCL_VOLATILE);
} while(0);
Ns_DStringFree(&dsBuf);
B_DestroyAlgorithmObject(&asciiEncoder);
if (err != 0) {
Ns_Log(Error, "nsssl: 'osi_octet_string tobase64' failed, "
"bsafe error %d", err);
break;
}
} else {
Tcl_AppendResult(interp, "usage: \"", argv[0],
" { tostring octets | fromstring string "
"| read filename "
"| write filename octets "
"| frombase64 string "
"| tobase64 octets }\"", NULL);
break;
}
status = TCL_OK;
} while(0);
if (rawBytes != NULL) {
ns_free(rawBytes);
}
Ns_DStringFree(&ds);
return status;
}
/*
*----------------------------------------------------------------------
*
* RsaKeyCmd --
*
* Tcl command that creates the keypair.
*
* Usage:
* ssl_rsa_key generate <modulus>
*
* Results:
* Octet string of the new keypair from NsSSLGenerateKeypair.
*
* Side effects:
* The string passed out is TCL_VOLATILE.
*
*----------------------------------------------------------------------
*/
static int
RsaKeyCmd(ClientData dummy, Tcl_Interp *interp, int argc, char **argv)
{
int status;
int err;
Ns_DString ds;
B_KEY_OBJ publicKey;
B_KEY_OBJ privateKey;
status = TCL_ERROR;
err = 0;
publicKey = NULL;
privateKey = NULL;
Ns_DStringInit(&ds);
do {
unsigned int numofmodulusbits;
ITEM *pItem;
if (argc != 3) {
Tcl_AppendResult(interp, "wrong # of args: should be \"",
argv[0], " command arg\"", NULL);
break;
}
if (strcasecmp(argv[1], "generate") == 0) {
numofmodulusbits = atoi(argv[2]);
#ifdef SSL_EXPORT
if ((numofmodulusbits < 256) || (numofmodulusbits > 512)) {
Tcl_AppendResult(interp, "Number of modulus bits must be "
"between 256 and 512 inclusive (export version).", NULL);
break;
}
#else
if ((numofmodulusbits < 256) || (numofmodulusbits > 1024)) {
Tcl_AppendResult(interp, "Number of modulus bits must be "
"between 256 and 1024 inclusive (non-export version).", NULL);
break;
}
#endif
if (NsSSLGenerateKeypair(numofmodulusbits, NULL, &publicKey,
&privateKey) != NS_OK) {
Tcl_AppendResult(interp, "Unable to generate keys.", NULL);
break;
}
err = B_GetKeyInfo((POINTER *) &pItem, privateKey,
KI_PKCS_RSAPrivateBER);
if (err != 0) {
break;
}
OctetStringEncode(&ds, (char *) pItem->data, pItem->len);
Tcl_SetResult(interp, ds.string, TCL_VOLATILE);
} else if (strcasecmp(argv[1], "publickey") == 0) {
ITEM item;
if (OctetStringDecode(&ds, argv[2]) != NS_OK) {
Tcl_AppendResult(interp, "Could not parse OCTET-STRING.",
NULL);
break;
}
err = B_CreateKeyObject(&privateKey);
if (err != 0) {
break;
}
item.data = (unsigned char *) ds.string;
item.len = ds.length;
err = B_SetKeyInfo(privateKey, KI_PKCS_RSAPrivateBER,
(POINTER) &item);
if (err != 0) {
break;
}
Ns_DStringTrunc(&ds, 0);
err = B_GetKeyInfo((POINTER *) &pItem, privateKey,
KI_RSAPublicBER);
if (err != 0) {
break;
}
OctetStringEncode(&ds, (char *) pItem->data, pItem->len);
Tcl_SetResult(interp, ds.string, TCL_VOLATILE);
}
status = TCL_OK;
} while (0);
if (err != 0) {
Ns_Log(Error, "nsssl: 'ssl_rsa_key %s' failed, bsafe error %d",
argv[1], err);
Tcl_AppendResult(interp, "encountered BSAFE error", NULL);
}
Ns_DStringFree(&ds);
if (publicKey != NULL) {
B_DestroyKeyObject(&publicKey);
}
if (privateKey != NULL) {
B_DestroyKeyObject(&privateKey);
}
return status;
}
/*
*----------------------------------------------------------------------
*
* SignatureCmd --
*
* Signs an octet string with the private key, suitable for
* signing a certificate request.
*
* Usage:
* ssl_signature <octet string> <octet string containing private key>
*
* Results:
* Bit string containing the signature.
*
* Side effects:
* The string passed out is TCL_VOLATILE.
*
*----------------------------------------------------------------------
*/
static int
SignatureCmd(ClientData dummy, Tcl_Interp *interp, int argc, char **argv)
{
int status;
int err;
Ns_DString ds;
B_ALGORITHM_OBJ algObj;
B_KEY_OBJ keyObj;
status = TCL_ERROR;
err = 0;
Ns_DStringInit(&ds);
algObj = NULL;
keyObj = NULL;
do {
if (argc != 4) {
Tcl_AppendResult(interp, "wrong # of args: should be \"",
argv[0], " sign data key\"", NULL);
break;
}
if (strcasecmp(argv[1], "sign") == 0) {
ITEM item;
unsigned char buf[1024];
unsigned int length;
if (OctetStringDecode(&ds, argv[3]) != NS_OK) {
Tcl_AppendResult(interp, "Could not parse OCTET-STRING.",
NULL);
break;
}
err = B_CreateKeyObject(&keyObj);
if (err != 0) {
break;
}
item.data = (unsigned char *) ds.string;
item.len = ds.length;
err = B_SetKeyInfo(keyObj, KI_PKCS_RSAPrivateBER,
(POINTER) &item);
if (err != 0) {
Tcl_AppendResult(interp, "Could not set private key.",
NULL);
break;
}
Ns_DStringTrunc(&ds, 0);
err = B_CreateAlgorithmObject(&algObj);
if (err != 0) {
break;
}
err = B_SetAlgorithmInfo(algObj, AI_MD5WithRSAEncryption, NULL);
if (err != 0) {
break;
}
err = B_SignInit(algObj, keyObj, ALGORITHM_CHOOSER, NULL);
if (err != 0) {
break;
}
if (OctetStringDecode(&ds, argv[2]) != NS_OK) {
Tcl_AppendResult(interp, "Could not parse OCTET-STRING.",
NULL);
break;
}
err = B_SignUpdate(algObj, (unsigned char *) ds.string,
ds.length, NULL);
if (err != 0) {
break;
}
err = B_SignFinal(algObj, buf, &length, sizeof(buf), NULL, NULL);
if (err != 0) {
break;
}
Ns_DStringTrunc(&ds, 0);
BitStringEncode(&ds, buf, length*8);
Tcl_SetResult(interp, ds.string, TCL_VOLATILE);
} else {
Tcl_AppendResult(interp, "unknown command \"", argv[1],
"\": should be sign.", NULL);
break;
}
status = TCL_OK;
} while (0);
if (err != 0) {
Ns_Log(Error, "nsssl: 'ssl_signature' failed, bsafe error %d", err);
Tcl_AppendResult(interp, "encountered BSAFE error", NULL);
}
Ns_DStringFree(&ds);
if (algObj != NULL) {
B_DestroyAlgorithmObject(&algObj);
}
if (keyObj != NULL) {
B_DestroyKeyObject(&keyObj);
}
return status;
}
/*
*----------------------------------------------------------------------
*
* EncryptCmd --
*
* Encrypts data.
*
* Usage:
* ssl_encrypt algorithm <data> <key>
*
* Results:
* Octet string representation of ciphertext.
*
* Side effects:
* The string passed out is TCL_VOLATILE.
*
*----------------------------------------------------------------------
*/
static int
EncryptCmd(ClientData dummy, Tcl_Interp *interp, int argc, char **argv)
{
int status;
int err;
Ns_DString ds;
Ns_DString dsBuf;
B_ALGORITHM_OBJ encryptor;
B_KEY_OBJ key;
status = TCL_ERROR;
err = 0;
encryptor = NULL;
key = NULL;
Ns_DStringInit(&ds);
Ns_DStringInit(&dsBuf);
do {
ITEM item;
unsigned char buf[1024];
unsigned char *data;
unsigned int length, updateLength;
if (argc != 4) {
Tcl_AppendResult(interp, "wrong # of args: should be \"",
argv[0], " algorithm data key\"", NULL);
break;
}
err = B_CreateAlgorithmObject(&encryptor);
if (err != 0) {
break;
}
err = B_CreateKeyObject(&key);
if (err != 0) {
break;
}
if (OctetStringDecode(&ds, argv[3]) != NS_OK) {
Tcl_AppendResult(interp, "Could not parse key OCTET-STRING.",
NULL);
break;
}
if (OctetStringDecode(&dsBuf, argv[2]) != NS_OK) {
Tcl_AppendResult(interp, "Could not parse data OCTET-STRING.",
NULL);
break;
}
if (strcasecmp(argv[1], "rc4") == 0) {
item.data = (unsigned char *) ds.string;
item.len = ds.length;
#ifdef SSL_EXPORT
if (item.len > 5) {
item.len = 5;
}
#endif
err = B_SetKeyInfo(key, KI_Item, (POINTER) &item);
if (err != 0) {
Tcl_AppendResult(interp, "Could not set key.",
NULL);
break;
}
Ns_DStringTrunc(&ds, 0);
err = B_SetAlgorithmInfo(encryptor, AI_RC4, NULL);
if (err != 0) {
break;
}
err = B_EncryptInit(encryptor, key, ALGORITHM_CHOOSER, NULL);
if (err != 0) {
break;
}
data = (unsigned char *) dsBuf.string;
length = dsBuf.length;
while (length > 0) {
int iToEncrypt;
iToEncrypt = length > sizeof(buf) ? sizeof(buf) : length;
err = B_EncryptUpdate(encryptor, buf, &updateLength,
sizeof(buf), data, iToEncrypt,
NULL, NULL);
if (err != 0) {
break;
}
if (updateLength > 0) {
Ns_DStringNAppend(&ds, (char *) buf, updateLength);
}
data += iToEncrypt;
length -= iToEncrypt;
}
if (err != 0) {
break;
}
err = B_EncryptFinal(encryptor, buf, &updateLength, sizeof(buf),
NULL, NULL);
if (err != 0) {
break;
}
if (updateLength > 0) {
Ns_DStringNAppend(&ds, (char *) buf, updateLength);
}
Ns_DStringTrunc(&dsBuf, 0);
OctetStringEncode(&dsBuf, ds.string, ds.length);
Tcl_SetResult(interp, dsBuf.string, TCL_VOLATILE);
} else {
Tcl_AppendResult(interp, "unknown algorithm \"", argv[1],
"\": should be rc4.", NULL);
break;
}
status = TCL_OK;
} while (0);
if (err != 0) {
Ns_Log(Error, "nsssl: 'ssl_encrypt' failed, bsafe error %d", err);
Tcl_AppendResult(interp, "encountered BSAFE error", NULL);
}
Ns_DStringFree(&ds);
Ns_DStringFree(&dsBuf);
if (encryptor != NULL) {
B_DestroyAlgorithmObject(&encryptor);
}
if (key != NULL) {
B_DestroyKeyObject(&key);
}
return status;
}
/*
*----------------------------------------------------------------------
*
* DecryptCmd --
*
* Decrypts data.
*
* Usage:
* ssl_decrypt algorithm <data> <key>
*
* Results:
* Octet string representation of cleartext.
*
* Side effects:
* The string passed out is TCL_VOLATILE.
*
*----------------------------------------------------------------------
*/
static int
DecryptCmd(ClientData dummy, Tcl_Interp *interp, int argc, char **argv)
{
int status;
int err;
Ns_DString ds;
Ns_DString dsBuf;
B_ALGORITHM_OBJ decryptor;
B_KEY_OBJ key;
status = TCL_ERROR;
err = 0;
decryptor = NULL;
key = NULL;
Ns_DStringInit(&ds);
Ns_DStringInit(&dsBuf);
do {
ITEM item;
unsigned char buf[1024];
unsigned char *data;
unsigned int length, updateLength;
if (argc != 4) {
Tcl_AppendResult(interp, "wrong # of args: should be \"",
argv[0], " algorithm data key\"", NULL);
break;
}
err = B_CreateAlgorithmObject(&decryptor);
if (err != 0) {
break;
}
err = B_CreateKeyObject(&key);
if (err != 0) {
break;
}
if (OctetStringDecode(&ds, argv[3]) != NS_OK) {
Tcl_AppendResult(interp, "Could not parse key OCTET-STRING.",
NULL);
break;
}
if (OctetStringDecode(&dsBuf, argv[2]) != NS_OK) {
Tcl_AppendResult(interp, "Could not parse data OCTET-STRING.",
NULL);
break;
}
if (strcasecmp(argv[1], "rc4") == 0) {
item.data = (unsigned char *) ds.string;
item.len = ds.length;
#ifdef SSL_EXPORT
if (item.len > 5) {
item.len = 5;
}
#endif
err = B_SetKeyInfo(key, KI_Item, (POINTER) &item);
if (err != 0) {
Tcl_AppendResult(interp, "Could not set key.",
NULL);
break;
}
Ns_DStringTrunc(&ds, 0);
err = B_SetAlgorithmInfo(decryptor, AI_RC4, NULL);
if (err != 0) {
break;
}
err = B_DecryptInit(decryptor, key, ALGORITHM_CHOOSER, NULL);
if (err != 0) {
break;
}
data = (unsigned char *) dsBuf.string;
length = dsBuf.length;
while (length > 0) {
int iToDecrypt;
iToDecrypt = length > sizeof(buf) ? sizeof(buf) : length;
err = B_DecryptUpdate(decryptor, buf, &updateLength,
sizeof(buf), data, iToDecrypt,
NULL, NULL);
if (err != 0) {
break;
}
if (updateLength > 0) {
Ns_DStringNAppend(&ds, (char *) buf, updateLength);
}
data += iToDecrypt;
length -= iToDecrypt;
}
if (err != 0) {
break;
}
err = B_DecryptFinal(decryptor, buf, &updateLength, sizeof(buf),
NULL, NULL);
if (err != 0) {
break;
}
if (updateLength > 0) {
Ns_DStringNAppend(&ds, (char *) buf, updateLength);
}
Ns_DStringTrunc(&dsBuf, 0);
OctetStringEncode(&dsBuf, ds.string, ds.length);
Tcl_SetResult(interp, dsBuf.string, TCL_VOLATILE);
} else {
Tcl_AppendResult(interp, "unknown algorithm \"", argv[1],
"\": should be rc4.", NULL);
break;
}
status = TCL_OK;
} while (0);
if (err != 0) {
Ns_Log(Error, "nsssl: 'ssl_decrypt' failed, bsafe error %d", err);
Tcl_AppendResult(interp, "encountered BSAFE error", NULL);
}
Ns_DStringFree(&ds);
Ns_DStringFree(&dsBuf);
if (decryptor != NULL) {
B_DestroyAlgorithmObject(&decryptor);
}
if (key != NULL) {
B_DestroyKeyObject(&key);
}
return status;
}
/*
*----------------------------------------------------------------------
*
* DigestCmd --
*
* Generates an octet string containing a message digest (hash).
* Note that MD5 is the only digest supported.
*
* Usage:
* ssl_digest algorithm <data>
*
* Results:
* Octet string representation of the message digest.
*
* Side effects:
* The string passed out is TCL_VOLATILE.
*
*----------------------------------------------------------------------
*/
static int
DigestCmd(ClientData dummy, Tcl_Interp *interp, int argc, char **argv)
{
int status;
int err;
Ns_DString ds;
B_ALGORITHM_OBJ digester;
status = TCL_ERROR;
err = 0;
digester = NULL;
Ns_DStringInit(&ds);
do {
unsigned char digest[16];
unsigned int length;
if (argc != 3) {
Tcl_AppendResult(interp, "wrong # of args: should be \"",
argv[0], " algorithm data\"", NULL);
break;
}
err = B_CreateAlgorithmObject(&digester);
if (err != 0) {
break;
}
if (OctetStringDecode(&ds, argv[2]) != NS_OK) {
Tcl_AppendResult(interp, "Could not parse OCTET-STRING.",
NULL);
break;
}
if (strcasecmp(argv[1], "md5") == 0) {
err = B_SetAlgorithmInfo(digester, AI_MD5, NULL);
if (err != 0) {
break;
}
err = B_DigestInit(digester, NULL, ALGORITHM_CHOOSER, NULL);
if (err != 0) {
break;
}
err = B_DigestUpdate(digester, (unsigned char *) ds.string,
ds.length, NULL);
if (err != 0) {
break;
}
err = B_DigestFinal(digester, digest, &length, 16, NULL);
if ((err != 0) || (length != 16)) {
break;
}
Ns_DStringTrunc(&ds, 0);
OctetStringEncode(&ds, (char *) digest, 16);
Tcl_SetResult(interp, ds.string, TCL_VOLATILE);
} else {
Tcl_AppendResult(interp, "unknown algorithm \"", argv[1],
"\": should be md5.", NULL);
break;
}
status = TCL_OK;
} while (0);
if (err != 0) {
Ns_Log(Error, "nsssl: 'ssl_digest' failed, bsafe error %d", err);
Tcl_AppendResult(interp, "encountered BSAFE error", NULL);
}
Ns_DStringFree(&ds);
if (digester != NULL) {
B_DestroyAlgorithmObject(&digester);
}
return status;
}
/*
*----------------------------------------------------------------------
*
* InfoCmd --
*
* Returns a proper Tcl list describing this nsssl module:
* {SSL_EXPORT} {SSL_PROTOCOL_VERSION}
*
* Results:
* Tcl string result.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
static int
InfoCmd(ClientData dummy, Tcl_Interp *interp, int argc, char **argv)
{
Ns_DString ds;
Ns_DStringInit(&ds);
#ifndef SSL_EXPORT
Ns_DStringPrintf(&ds, "{%d} ", NS_FALSE);
#else
Ns_DStringPrintf(&ds, "{%d} ", SSL_EXPORT);
#endif
Ns_DStringPrintf(&ds, "{%s} ", SSL_PROTOCOL_VERSION);
Tcl_SetResult(interp, ds.string, TCL_VOLATILE);
Ns_DStringFree(&ds);
return NS_OK;
}
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