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*
* Side effects:
* Sets result to a list of key and iv values, or an error message
*
*-------------------------------------------------------------------
*/
static int KDF_PBKDF2(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]) {
int pass_len = 0, salt_len = 0, fn;
Tcl_Size fn, salt_len = 0, pass_len = 0;
int iklen, ivlen, iter = 1;
unsigned char *pass = NULL, *salt = NULL;
const EVP_MD *md = NULL;
const EVP_CIPHER *cipher = NULL;
int buf_len = (EVP_MAX_KEY_LENGTH + EVP_MAX_IV_LENGTH)*4, dk_len = buf_len;
unsigned char tmpkeyiv[(EVP_MAX_KEY_LENGTH + EVP_MAX_IV_LENGTH)*4];
(void) clientData;
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/* Get option */
if (Tcl_GetIndexFromObj(interp, objv[idx], command_opts, "option", 0, &fn) != TCL_OK) {
return TCL_ERROR;
}
/* Validate arg has a value */
if (++idx >= objc) {
Tcl_AppendResult(interp, "No value for option \"", command_opts[fn], "\"", NULL);
Tcl_AppendResult(interp, "No value for option \"", command_opts[fn], "\"", (char *) NULL);
return TCL_ERROR;
}
switch(fn) {
case _opt_cipher:
if ((cipher = Util_GetCipher(interp, objv[idx], TRUE)) == NULL) {
return TCL_ERROR;
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}
break;
}
}
/* Validate options */
if (md == NULL) {
Tcl_AppendResult(interp, "no digest", NULL);
Tcl_AppendResult(interp, "no digest", (char *) NULL);
return TCL_ERROR;
}
/* Set output type sizes */
if (cipher == NULL) {
if (dk_len > buf_len) dk_len = buf_len;
iklen = dk_len;
ivlen = 0;
} else {
iklen = EVP_CIPHER_key_length(cipher);
ivlen = EVP_CIPHER_iv_length(cipher);
dk_len = iklen+ivlen;
}
/* Derive key */
if (!PKCS5_PBKDF2_HMAC(pass, pass_len, salt, salt_len, iter, md, dk_len, tmpkeyiv)) {
Tcl_AppendResult(interp, "Key derivation failed: ", REASON(), NULL);
if (!PKCS5_PBKDF2_HMAC(pass, (int) pass_len, salt, (int) salt_len, iter, md, dk_len, tmpkeyiv)) {
Tcl_AppendResult(interp, "Key derivation failed: ", REASON(), (char *) NULL);
return TCL_ERROR;
}
/* Set result to key and iv */
if (cipher == NULL) {
Tcl_SetObjResult(interp, Tcl_NewByteArrayObj(tmpkeyiv, dk_len));
Tcl_SetObjResult(interp, Tcl_NewByteArrayObj(tmpkeyiv, (Tcl_Size) dk_len));
} else {
Tcl_Obj *resultObj = Tcl_NewListObj(0, NULL);
LAPPEND_BARRAY(interp, resultObj, "key", tmpkeyiv, iklen);
LAPPEND_BARRAY(interp, resultObj, "iv", tmpkeyiv+iklen, ivlen);
LAPPEND_BARRAY(interp, resultObj, "key", tmpkeyiv, (Tcl_Size) iklen);
LAPPEND_BARRAY(interp, resultObj, "iv", tmpkeyiv+iklen, (Tcl_Size) ivlen);
Tcl_SetObjResult(interp, resultObj);
}
/* Clear data */
memset(tmpkeyiv, 0, buf_len);
return TCL_OK;
}
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*
*-------------------------------------------------------------------
*/
static int KDF_HKDF(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]) {
EVP_PKEY_CTX *pctx = NULL;
const EVP_MD *md = NULL;
unsigned char *salt = NULL, *key = NULL, *info = NULL, *out = NULL;
int salt_len = 0, key_len = 0, info_len = 0, res = TCL_OK, fn;
Tcl_Size salt_len = 0, key_len = 0, info_len = 0;
int res = TCL_OK;
Tcl_Size fn;
int dk_len = EVP_MAX_KEY_LENGTH + EVP_MAX_IV_LENGTH;
size_t out_len;
Tcl_Obj *resultObj;
(void) clientData;
dprintf("Called");
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/* Get option */
if (Tcl_GetIndexFromObj(interp, objv[idx], command_opts, "option", 0, &fn) != TCL_OK) {
return TCL_ERROR;
}
/* Validate arg has a value */
if (++idx >= objc) {
Tcl_AppendResult(interp, "No value for option \"", command_opts[fn], "\"", NULL);
Tcl_AppendResult(interp, "No value for option \"", command_opts[fn], "\"", (char *) NULL);
return TCL_ERROR;
}
switch(fn) {
case _opt_digest:
case _opt_hash:
if ((md = Util_GetDigest(interp, objv[idx], TRUE)) == NULL) {
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|
goto error;
}
break;
}
}
if (md == NULL) {
Tcl_AppendResult(interp, "no digest", NULL);
Tcl_AppendResult(interp, "no digest", (char *) NULL);
goto error;
}
if (key == NULL) {
Tcl_AppendResult(interp, "no key", NULL);
Tcl_AppendResult(interp, "no key", (char *) NULL);
goto error;
}
/* Create context */
pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_HKDF, NULL);
if (pctx == NULL) {
Tcl_AppendResult(interp, "Memory allocation error", NULL);
Tcl_AppendResult(interp, "Memory allocation error", (char *) NULL);
goto error;
}
if (EVP_PKEY_derive_init(pctx) < 1) {
Tcl_AppendResult(interp, "Initialize failed: ", REASON(), NULL);
Tcl_AppendResult(interp, "Initialize failed: ", REASON(), (char *) NULL);
goto error;
}
/* Set config parameters */
if (EVP_PKEY_CTX_set_hkdf_md(pctx, md) < 1) {
Tcl_AppendResult(interp, "Set digest failed: ", REASON(), NULL);
Tcl_AppendResult(interp, "Set digest failed: ", REASON(), (char *) NULL);
goto error;
}
if (EVP_PKEY_CTX_set1_hkdf_key(pctx, key, key_len) < 1) {
Tcl_AppendResult(interp, "Set key failed: ", REASON(), NULL);
if (EVP_PKEY_CTX_set1_hkdf_key(pctx, key, (int) key_len) < 1) {
Tcl_AppendResult(interp, "Set key failed: ", REASON(), (char *) NULL);
goto error;
}
if (salt != NULL && EVP_PKEY_CTX_set1_hkdf_salt(pctx, salt, salt_len) < 1) {
Tcl_AppendResult(interp, "Set salt failed: ", REASON(), NULL);
if (salt != NULL && EVP_PKEY_CTX_set1_hkdf_salt(pctx, salt, (int) salt_len) < 1) {
Tcl_AppendResult(interp, "Set salt failed: ", REASON(), (char *) NULL);
goto error;
}
if (info != NULL && EVP_PKEY_CTX_add1_hkdf_info(pctx, info, info_len) < 1) {
Tcl_AppendResult(interp, "Set info failed: ", REASON(), NULL);
if (info != NULL && EVP_PKEY_CTX_add1_hkdf_info(pctx, info, (int) info_len) < 1) {
Tcl_AppendResult(interp, "Set info failed: ", REASON(), (char *) NULL);
goto error;
}
/* Get buffer */
resultObj = Tcl_NewObj();
if ((out = Tcl_SetByteArrayLength(resultObj, dk_len)) == NULL) {
if ((out = Tcl_SetByteArrayLength(resultObj, (Tcl_Size) dk_len)) == NULL) {
Tcl_AppendResult(interp, "Memory allocation error", (char *) NULL);
goto error;
}
out_len = (size_t) dk_len;
/* Derive key */
if (EVP_PKEY_derive(pctx, out, &out_len) > 0) {
/* Shrink buffer to actual size */
Tcl_SetByteArrayLength(resultObj, (int) out_len);
Tcl_SetByteArrayLength(resultObj, (Tcl_Size) out_len);
Tcl_SetObjResult(interp, resultObj);
res = TCL_OK;
goto done;
} else {
Tcl_AppendResult(interp, "Key derivation failed: ", REASON(), NULL);
Tcl_AppendResult(interp, "Key derivation failed: ", REASON(), (char *) NULL);
Tcl_DecrRefCount(resultObj);
}
error:
res = TCL_ERROR;
done:
if (pctx != NULL) {
|
| ︙ | | |
314
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|
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|
+
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+
+
|
* Sets result to a list of key and iv values, or an error message
*
*-------------------------------------------------------------------
*/
static int KDF_Scrypt(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]) {
EVP_PKEY_CTX *pctx = NULL;
unsigned char *salt = NULL, *pass = NULL, *out = NULL;
Tcl_Size salt_len = 0, pass_len = 0;
int salt_len = 0, pass_len = 0, dk_len = 64, res = TCL_OK, fn;
int dk_len = 64, res = TCL_OK;
Tcl_Size fn;
uint64_t N = 0, p = 0, r = 0, maxmem = 0;
size_t out_len;
Tcl_Obj *resultObj;
(void) clientData;
dprintf("Called");
|
| ︙ | | |
390
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|
-
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-
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-
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-
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-
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-
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-
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|
pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_SCRYPT, NULL);
if (pctx == NULL) {
Tcl_AppendResult(interp, "Memory allocation error", (char *) NULL);
goto error;
}
if (EVP_PKEY_derive_init(pctx) < 1) {
Tcl_AppendResult(interp, "Initialize failed: ", REASON(), NULL);
Tcl_AppendResult(interp, "Initialize failed: ", REASON(), (char *) NULL);
goto error;
}
/* Set config parameters */
if (EVP_PKEY_CTX_set1_pbe_pass(pctx, pass, pass_len) < 1) {
Tcl_AppendResult(interp, "Set key failed: ", REASON(), NULL);
if (EVP_PKEY_CTX_set1_pbe_pass(pctx, pass, (int) pass_len) < 1) {
Tcl_AppendResult(interp, "Set key failed: ", REASON(), (char *) NULL);
goto error;
}
if (EVP_PKEY_CTX_set1_scrypt_salt(pctx, salt, salt_len) < 1) {
Tcl_AppendResult(interp, "Set salt failed: ", REASON(), NULL);
if (EVP_PKEY_CTX_set1_scrypt_salt(pctx, salt, (int) salt_len) < 1) {
Tcl_AppendResult(interp, "Set salt failed: ", REASON(), (char *) NULL);
goto error;
}
if (N != 0 && EVP_PKEY_CTX_set_scrypt_N(pctx, N) < 1) {
Tcl_AppendResult(interp, "Set cost parameter (N) failed: ", REASON(), NULL);
Tcl_AppendResult(interp, "Set cost parameter (N) failed: ", REASON(), (char *) NULL);
goto error;
}
if (r != 0 && EVP_PKEY_CTX_set_scrypt_r(pctx, r) < 1) {
Tcl_AppendResult(interp, "Set lock size parameter (r) failed: ", REASON(), NULL);
Tcl_AppendResult(interp, "Set lock size parameter (r) failed: ", REASON(), (char *) NULL);
goto error;
}
if (p != 0 && EVP_PKEY_CTX_set_scrypt_p(pctx, p) < 1) {
Tcl_AppendResult(interp, "Set Parallelization parameter (p) failed: ", REASON(), NULL);
Tcl_AppendResult(interp, "Set Parallelization parameter (p) failed: ", REASON(), (char *) NULL);
goto error;
}
if (maxmem != 0 && EVP_PKEY_CTX_set_scrypt_maxmem_bytes(pctx, maxmem) < 1) {
Tcl_AppendResult(interp, "Set max memory failed: ", REASON(), NULL);
Tcl_AppendResult(interp, "Set max memory failed: ", REASON(), (char *) NULL);
goto error;
}
/* Get buffer */
resultObj = Tcl_NewObj();
if ((out = Tcl_SetByteArrayLength(resultObj, dk_len)) == NULL) {
if ((out = Tcl_SetByteArrayLength(resultObj, (Tcl_Size) dk_len)) == NULL) {
Tcl_AppendResult(interp, "Memory allocation error", (char *) NULL);
goto error;
}
out_len = (size_t) dk_len;
/* Derive key */
if (EVP_PKEY_derive(pctx, out, &out_len) > 0) {
/* Shrink buffer to actual size */
Tcl_SetByteArrayLength(resultObj, (int) out_len);
Tcl_SetByteArrayLength(resultObj, (Tcl_Size) out_len);
Tcl_SetObjResult(interp, resultObj);
goto done;
} else {
Tcl_AppendResult(interp, "Key derivation failed: ", REASON(), NULL);
Tcl_AppendResult(interp, "Key derivation failed: ", REASON(), (char *) NULL);
Tcl_DecrRefCount(resultObj);
}
error:
res = TCL_ERROR;
done:
|
| ︙ | | |