1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
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
|
MODULE = CryptX PACKAGE = Crypt::PK::X25519
PROTOTYPES: DISABLE
Crypt::PK::X25519
_new(Class)
CODE:
{
int rv;
Newz(0, RETVAL, 1, struct x25519_struct);
if (!RETVAL) croak("FATAL: Newz failed");
RETVAL->initialized = 0;
RETVAL->pindex = find_prng("chacha20");
if (RETVAL->pindex == -1) {
Safefree(RETVAL);
croak("FATAL: find_prng('chacha20') failed");
}
rv = rng_make_prng(320, RETVAL->pindex, &RETVAL->pstate, NULL); /* 320bits = 40bytes */
if (rv != CRYPT_OK) {
Safefree(RETVAL);
croak("FATAL: rng_make_prng failed: %s", error_to_string(rv));
}
}
OUTPUT:
RETVAL
void
generate_key(Crypt::PK::X25519 self)
PPCODE:
{
int rv;
self->initialized = 0;
rv = x25519_make_key(&self->pstate, self->pindex, &self->key);
if (rv != CRYPT_OK) croak("FATAL: x25519_make_key failed: %s", error_to_string(rv));
self->initialized = 1;
XPUSHs(ST(0)); /* return self */
}
void
_import(Crypt::PK::X25519 self, SV * key_data)
PPCODE:
{
int rv;
unsigned char *data=NULL;
STRLEN data_len=0;
data = (unsigned char *)SvPVbyte(key_data, data_len);
self->initialized = 0;
rv = x25519_import(data, (unsigned long)data_len, &self->key);
if (rv != CRYPT_OK) croak("FATAL: x25519_import failed: %s", error_to_string(rv));
self->initialized = 1;
XPUSHs(ST(0)); /* return self */
}
void
_import_pkcs8(Crypt::PK::X25519 self, SV * key_data, SV * passwd)
PPCODE:
{
int rv;
unsigned char *data = NULL;
STRLEN data_len = 0;
password_ctx pw_ctx = { cryptx_internal_password_cb_getpw, cryptx_internal_password_cb_free, passwd };
data = (unsigned char *)SvPVbyte(key_data, data_len);
self->initialized = 0;
if (SvOK(passwd)) {
rv = x25519_import_pkcs8(data, (unsigned long)data_len, &pw_ctx, &self->key);
}
else {
rv = x25519_import_pkcs8(data, (unsigned long)data_len, NULL, &self->key);
}
if (rv != CRYPT_OK) croak("FATAL: x25519_import_pkcs8 failed: %s", error_to_string(rv));
self->initialized = 1;
XPUSHs(ST(0)); /* return self */
}
void
_import_pem(Crypt::PK::X25519 self, SV * key_data, SV * passwd)
PPCODE:
{
int rv;
unsigned char *data = NULL;
STRLEN data_len = 0;
password_ctx pw_ctx = { cryptx_internal_password_cb_getpw, cryptx_internal_password_cb_free, passwd };
ltc_pka_key key_from_pem;
data = (unsigned char *)SvPVbyte(key_data, data_len);
self->initialized = 0;
if (SvOK(passwd)) {
rv = pem_decode_pkcs(data, (unsigned long)data_len, &key_from_pem, &pw_ctx);
}
else {
rv = pem_decode_pkcs(data, (unsigned long)data_len, &key_from_pem, NULL);
}
if (rv != CRYPT_OK) croak("FATAL: pem_decode_pkcs failed: %s", error_to_string(rv));
if (key_from_pem.id != LTC_PKA_X25519) croak("FATAL: pem_decode_pkcs decoded non-X25519 key");
self->key = key_from_pem.u.x25519;
self->initialized = 1;
XPUSHs(ST(0)); /* return self */
}
void
_import_x509(Crypt::PK::X25519 self, SV * key_data)
PPCODE:
{
int rv;
unsigned char *data=NULL;
STRLEN data_len=0;
data = (unsigned char *)SvPVbyte(key_data, data_len);
self->initialized = 0;
rv = x25519_import_x509(data, (unsigned long)data_len, &self->key);
if (rv != CRYPT_OK) croak("FATAL: x25519_import_x509 failed: %s", error_to_string(rv));
self->initialized = 1;
XPUSHs(ST(0)); /* return self */
}
void
_import_raw(Crypt::PK::X25519 self, SV * key, int which)
PPCODE:
{
int rv;
unsigned char *key_data=NULL;
STRLEN key_len=0;
if (SvOK(key)) {
key_data = (unsigned char *)SvPVbyte(key, key_len);
}
self->initialized = 0;
if (which == 0) {
rv = x25519_import_raw(key_data, (unsigned long)key_len, PK_PUBLIC, &self->key);
}
else if (which == 1) {
rv = x25519_import_raw(key_data, (unsigned long)key_len, PK_PRIVATE, &self->key);
}
else {
croak("FATAL: import_raw invalid type '%d'", which);
}
if (rv != CRYPT_OK) croak("FATAL: x25519_import_raw failed: %s", error_to_string(rv));
self->initialized = 1;
XPUSHs(ST(0)); /* return self */
}
int
is_private(Crypt::PK::X25519 self)
CODE:
if (self->initialized == 0) XSRETURN_UNDEF;
RETVAL = (self->key.type == PK_PRIVATE) ? 1 : 0;
OUTPUT:
RETVAL
SV*
key2hash(Crypt::PK::X25519 self)
PREINIT:
HV *rv_hash;
char buf[32 * 2 + 1];
unsigned long blen;
SV **not_used;
int rv;
CODE:
if (self->initialized == 0) XSRETURN_UNDEF;
rv_hash = newHV();
/* priv */
if (self->key.type == PK_PRIVATE) {
blen = sizeof(buf);
rv = base16_encode(self->key.priv, sizeof(self->key.priv), buf, &blen, 0);
if (rv != CRYPT_OK) croak("FATAL: base16_encode failed: %s", error_to_string(rv));
not_used = hv_store(rv_hash, "priv", 4, newSVpv(buf, blen), 0);
}
else {
not_used = hv_store(rv_hash, "priv", 4, newSVpvn(NULL, 0), 0); /* undef */
}
/* pub */
blen = sizeof(buf);
rv = base16_encode(self->key.pub, sizeof(self->key.pub), buf, &blen, 0);
if (rv != CRYPT_OK) croak("FATAL: base16_encode failed: %s", error_to_string(rv));
not_used = hv_store(rv_hash, "pub", 3, newSVpv(buf, blen), 0);
/* curve */
not_used = hv_store(rv_hash, "curve", 5, newSVpv("x25519", 0), 0);
LTC_UNUSED_PARAM(not_used);
RETVAL = newRV_noinc((SV*)rv_hash);
OUTPUT:
RETVAL
SV*
export_key_der(Crypt::PK::X25519 self, char * type)
CODE:
{
int rv;
unsigned char out[4096];
unsigned long int out_len = sizeof(out);
RETVAL = newSVpvn(NULL, 0); /* undef */
if (strnEQ(type, "private", 7)) {
rv = x25519_export(out, &out_len, PK_PRIVATE|PK_STD, &self->key);
if (rv != CRYPT_OK) croak("FATAL: x25519_export(PK_PRIVATE|PK_STD) failed: %s", error_to_string(rv));
RETVAL = newSVpvn((char*)out, out_len);
}
else if (strnEQ(type, "public", 6)) {
rv = x25519_export(out, &out_len, PK_PUBLIC|PK_STD, &self->key);
if (rv != CRYPT_OK) croak("FATAL: x25519_export(PK_PUBLIC|PK_STD) failed: %s", error_to_string(rv));
RETVAL = newSVpvn((char*)out, out_len);
}
else {
croak("FATAL: export_key_der invalid type '%s'", type);
}
}
OUTPUT:
RETVAL
SV*
export_key_raw(Crypt::PK::X25519 self, char * type)
CODE:
{
int rv;
unsigned char out[32];
unsigned long int out_len = sizeof(out);
RETVAL = newSVpvn(NULL, 0); /* undef */
if (strnEQ(type, "private", 7)) {
rv = x25519_export(out, &out_len, PK_PRIVATE, &self->key);
if (rv != CRYPT_OK) croak("FATAL: x25519_export(PK_PRIVATE) failed: %s", error_to_string(rv));
RETVAL = newSVpvn((char*)out, out_len);
}
else if (strnEQ(type, "public", 6)) {
rv = x25519_export(out, &out_len, PK_PUBLIC, &self->key);
if (rv != CRYPT_OK) croak("FATAL: x25519_export(PK_PUBLIC) failed: %s", error_to_string(rv));
RETVAL = newSVpvn((char*)out, out_len);
}
else {
croak("FATAL: export_key_raw invalid type '%s'", type);
}
}
OUTPUT:
RETVAL
SV *
shared_secret(Crypt::PK::X25519 self, Crypt::PK::X25519 pubkey)
CODE:
{
int rv;
unsigned char buffer[1024];
unsigned long int buffer_len = sizeof(buffer);
rv = x25519_shared_secret(&self->key, &pubkey->key, buffer, &buffer_len);
if (rv != CRYPT_OK) croak("FATAL: x25519_shared_secret failed: %s", error_to_string(rv));
RETVAL = newSVpvn((char*)buffer, buffer_len);
}
OUTPUT:
RETVAL
void
DESTROY(Crypt::PK::X25519 self)
CODE:
Safefree(self);
|
