56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
|
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
|
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
-
+
-
-
-
-
-
-
-
+
+
+
+
+
+
+
+
+
+
+
+
-
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
-
+
+
+
|
buffer[length - 1] = (length % 256);
length--;
}
return;
}
#define NANO_SECRET_KEY_LENGTH (crypto_sign_SECRETKEYBYTES - crypto_sign_PUBLICKEYBYTES)
#define NANO_PUBLIC_KEY_LENGTH (crypto_sign_PUBLICKEYBYTES)
static unsigned char *nano_parse_secret_key(Tcl_Obj *secret_key_only_obj, int *out_key_length) {
unsigned char *secret_key, *public_key, *secret_key_only;
int secret_key_length, secret_key_only_length;
secret_key_only = Tcl_GetByteArrayFromObj(secret_key_only_obj, &secret_key_only_length);
if (secret_key_only_length != NANO_SECRET_KEY_LENGTH) {
return(NULL);
}
if ((NANO_SECRET_KEY_LENGTH + NANO_PUBLIC_KEY_LENGTH) != crypto_sign_SECRETKEYBYTES) {
return(NULL);
}
secret_key_length = crypto_sign_SECRETKEYBYTES;
secret_key = (unsigned char *) Tcl_AttemptAlloc(secret_key_length);
if (!secret_key) {
return(NULL);
}
memcpy(secret_key, secret_key_only, secret_key_only_length);
public_key = secret_key + secret_key_only_length;
crypto_sign_keypair(public_key, secret_key, 0);
*out_key_length = secret_key_length;
return(secret_key);
}
static int nano_tcl_secret_key_to_public_key(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]) {
unsigned char *secret_key, *public_key;
int secret_key_length, public_key_length;
if (objc != 2) {
Tcl_WrongNumArgs(interp, 1, objv, "secretKey");
return(TCL_ERROR);
}
secret_key = Tcl_GetByteArrayFromObj(objv[1], &secret_key_length);
if (secret_key_length != NANO_SECRET_KEY_LENGTH) {
Tcl_SetResult(interp, "Secret key is not the right size", NULL);
return(TCL_ERROR);
}
public_key_length = NANO_PUBLIC_KEY_LENGTH;
public_key = (unsigned char *) Tcl_AttemptAlloc(public_key_length);
if (!public_key) {
Tcl_SetResult(interp, "Internal error", NULL);
return(TCL_ERROR);
}
crypto_sign_keypair(public_key, secret_key, 0);
Tcl_SetObjResult(interp, Tcl_NewByteArrayObj(public_key, public_key_length));
Tcl_Free((char *) public_key);
return(TCL_OK);
/* NOTREACH */
clientData = clientData;
}
static int nano_sign(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]) {
static int nano_tcl_sign_detached(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]) {
int cs_ret;
unsigned char *signature, *data, *secret_key;
unsigned long long signature_length;
int data_length, secret_key_length;
if (objc != 3) {
Tcl_WrongNumArgs(interp, 1, objv, "data secretKey");
return(TCL_ERROR);
}
data = Tcl_GetByteArrayFromObj(objv[1], &data_length);
secret_key = Tcl_GetByteArrayFromObj(objv[2], &secret_key_length);
if (secret_key_length != crypto_sign_SECRETKEYBYTES) {
Tcl_SetResult(interp, "Secret key is not the right size", NULL);
return(TCL_ERROR);
}
Tcl_SetObjResult(interp, Tcl_NewByteArrayObj(signature, signature_length));
Tcl_SetObjResult(interp, Tcl_NewByteArrayObj(signature, crypto_sign_BYTES));
Tcl_Free((char *) signature);
Tcl_Free((char *) secret_key);
return(TCL_OK);
/* NOTREACH */
clientData = clientData;
}
static int nano_tcl_verify_detached(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]) {
int cso_ret;
unsigned char *signature, *data, *signed_data, *public_key;
int signature_length, data_length, signed_data_length, public_key_length;
unsigned long long data_length_nacl;
if (objc != 4) {
Tcl_WrongNumArgs(interp, 1, objv, "data signature publicKey");
return(TCL_ERROR);
}
data = Tcl_GetByteArrayFromObj(objv[1], &data_length);
signature = Tcl_GetByteArrayFromObj(objv[2], &signature_length);
if (signature_length != crypto_sign_BYTES) {
Tcl_SetResult(interp, "Signature is not the right size", NULL);
return(TCL_ERROR);
}
public_key = Tcl_GetByteArrayFromObj(objv[3], &public_key_length);
if (public_key_length != NANO_PUBLIC_KEY_LENGTH) {
Tcl_SetResult(interp, "Public key is not the right size", NULL);
return(TCL_ERROR);
}
signed_data_length = data_length + signature_length;
signed_data = (unsigned char *) Tcl_AttemptAlloc(signed_data_length);
if (!signed_data) {
Tcl_SetResult(interp, "Internal error", NULL);
return(TCL_ERROR);
}
memcpy(signed_data, signature, signature_length);
memcpy(signed_data + signature_length, data, data_length);
data_length_nacl = data_length;
cso_ret = crypto_sign_open(data, &data_length_nacl, signed_data, signed_data_length, public_key);
if (cso_ret != 0) {
Tcl_Free((char *) signed_data);
Tcl_SetResult(interp, "crypto_sign_open failed", NULL);
return(TCL_ERROR);
}
Tcl_Free((char *) signed_data);
/* XXX:TODO: Validate */
return(TCL_OK);
/* NOTREACH */
clientData = clientData;
}
int Nano_Init(Tcl_Interp *interp) {
#ifdef USE_TCL_STUBS
const char *tclInitStubs_ret;
/* Initialize Stubs */
tclInitStubs_ret = Tcl_InitStubs(interp, TCL_PATCH_LEVEL, 0);
if (!tclInitStubs_ret) {
return(TCL_ERROR);
}
#endif
Tcl_CreateObjCommand(interp, "::nano::internal::sign", nano_sign, NULL, NULL);
Tcl_CreateObjCommand(interp, "::nano::internal::signDetached", nano_tcl_sign_detached, NULL, NULL);
Tcl_CreateObjCommand(interp, "::nano::internal::publicKey", nano_tcl_secret_key_to_public_key, NULL, NULL);
Tcl_CreateObjCommand(interp, "::nano::internal::verifyDetached", nano_tcl_verify_detached, NULL, NULL);
return(TCL_OK);
}
|