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
|
#include "c_utils.h"
#define _ISOC99_SOURCE
#include <string.h>
#include <stdlib.h>
jclass ec_parameter_spec_class;
jclass ecgen_parameter_spec_class;
jclass secret_key_spec_class;
jclass pubkey_class;
jclass privkey_class;
jclass keypair_class;
jclass elliptic_curve_class;
jclass fp_field_class;
jclass f2m_field_class;
jclass point_class;
jclass biginteger_class;
jclass illegal_state_exception_class;
void init_classes(JNIEnv *env, const char* lib_name) {
jclass local_ec_parameter_spec_class = (*env)->FindClass(env, "java/security/spec/ECParameterSpec");
ec_parameter_spec_class = (*env)->NewGlobalRef(env, local_ec_parameter_spec_class);
jclass local_ecgen_parameter_spec_class = (*env)->FindClass(env, "java/security/spec/ECGenParameterSpec");
ecgen_parameter_spec_class = (*env)->NewGlobalRef(env, local_ecgen_parameter_spec_class);
jclass local_secret_key_spec_class = (*env)->FindClass(env, "javax/crypto/spec/SecretKeySpec");
secret_key_spec_class = (*env)->NewGlobalRef(env, local_secret_key_spec_class);
const char *pubkey_base = "cz/crcs/ectester/standalone/libs/jni/NativeECPublicKey$";
char pubkey_class_name[2048] = { 0 }; //strlen(pubkey_base) + strlen(lib_name) + 1
pubkey_class_name[0] = 0;
strcat(pubkey_class_name, pubkey_base);
strcat(pubkey_class_name, lib_name);
jclass local_pubkey_class = (*env)->FindClass(env, pubkey_class_name);
pubkey_class = (*env)->NewGlobalRef(env, local_pubkey_class);
const char *privkey_base = "cz/crcs/ectester/standalone/libs/jni/NativeECPrivateKey$";
char privkey_class_name[2048] = { 0 }; //strlen(privkey_base) + strlen(lib_name) + 1
privkey_class_name[0] = 0;
strcat(privkey_class_name, privkey_base);
strcat(privkey_class_name, lib_name);
jclass local_privkey_class = (*env)->FindClass(env, privkey_class_name);
privkey_class = (*env)->NewGlobalRef(env, local_privkey_class);
jclass local_keypair_class = (*env)->FindClass(env, "java/security/KeyPair");
keypair_class = (*env)->NewGlobalRef(env, local_keypair_class);
jclass local_elliptic_curve_class = (*env)->FindClass(env, "java/security/spec/EllipticCurve");
elliptic_curve_class = (*env)->NewGlobalRef(env, local_elliptic_curve_class);
jclass local_fp_field_class = (*env)->FindClass(env, "java/security/spec/ECFieldFp");
fp_field_class = (*env)->NewGlobalRef(env, local_fp_field_class);
jclass local_f2m_field_class = (*env)->FindClass(env, "java/security/spec/ECFieldF2m");
f2m_field_class = (*env)->NewGlobalRef(env, local_f2m_field_class);
jclass local_biginteger_class = (*env)->FindClass(env, "java/math/BigInteger");
biginteger_class = (*env)->NewGlobalRef(env, local_biginteger_class);
jclass local_point_class = (*env)->FindClass(env, "java/security/spec/ECPoint");
point_class = (*env)->NewGlobalRef(env, local_point_class);
jclass local_illegal_state_exception_class = (*env)->FindClass(env, "java/lang/IllegalStateException");
illegal_state_exception_class = (*env)->NewGlobalRef(env, local_illegal_state_exception_class);
}
void throw_new(JNIEnv *env, const char *class, const char *message) {
jclass clazz = (*env)->FindClass(env, class);
(*env)->ThrowNew(env, clazz, message);
}
void throw_new_var(JNIEnv *env, const char *class, const char *format, ...) {
char buffer[2048];
va_list args;
va_start(args, format);
vsnprintf(buffer, 2048, format, args);
va_end(args);
throw_new(env, class, buffer);
}
jint get_kdf_bits(JNIEnv *env, jstring algorithm) {
if (algorithm == NULL) {
return 0;
}
const char *algo_data = (*env)->GetStringUTFChars(env, algorithm, NULL);
jint result = 0;
if (strcmp(algo_data, "DES") == 0) {
result = 64;
} else if (strcmp(algo_data, "BLOWFISH") == 0) {
result = 128;
} else if (strcmp(algo_data, "DESEDE") == 0) {
result = 192;
} else if (strcmp(algo_data, "AES") == 0 || strcmp(algo_data, "CAMELLIA") == 0) {
result = 256;
} else {
char *end;
long bits = strtol(algo_data, &end, 10);
if (*end == 0) {
result = (jint) bits;
}
}
(*env)->ReleaseStringUTFChars(env, algorithm, algo_data);
return result;
}
jbyteArray asn1_der_encode(JNIEnv *env, const jbyte *r, size_t r_len, const jbyte *s, size_t s_len) {
jbyte r_length = (jbyte) r_len + (r[0] & 0x80 ? 1 : 0);
jbyte s_length = (jbyte) s_len + (s[0] & 0x80 ? 1 : 0);
// R and S are < 128 bytes, so 1 byte tag + 1 byte len + len bytes value
size_t seq_value_len = 2 + r_length + 2 + s_length;
size_t whole_len = seq_value_len;
// The SEQUENCE length might be >= 128, so more bytes of length
size_t seq_len_len = 0;
if (seq_value_len >= 128) {
size_t s = seq_value_len;
while ((s = s >> 8)) {
seq_len_len++;
}
}
// seq_len_len bytes for length and one for length of length
whole_len += seq_len_len + 1;
// 1 byte tag for SEQUENCE
whole_len += 1;
jbyteArray result = (jbyteArray) (*env)->NewByteArray(env, whole_len);
jbyte *data = (*env)->GetByteArrayElements(env, result, NULL);
size_t i = 0;
data[i++] = 0x30; // SEQUENCE
if (seq_value_len < 128) {
data[i++] = (jbyte) seq_value_len;
} else {
data[i++] = (jbyte) (seq_len_len | (1 << 7));
for (size_t j = 0; j < seq_len_len; ++j) {
data[i++] = (jbyte) (seq_value_len & (0xff << (seq_len_len - j)));
}
}
data[i++] = 0x02; //INTEGER
data[i++] = r_length;
if (r[0] & 0x80) {
data[i++] = 0;
}
memcpy(data + i, r, r_len);
i += r_len;
data[i++] = 0x02; //INTEGER
data[i++] = s_length;
if (s[0] & 0x80) {
data[i++] = 0;
}
memcpy(data + i, s, s_len);
i += s_len;
(*env)->ReleaseByteArrayElements(env, result, data, 0);
return result;
}
bool asn1_der_decode(JNIEnv *env, jbyteArray sig, jbyte **r_data, size_t *r_len, jbyte **s_data, size_t *s_len) {
size_t sig_len = (*env)->GetArrayLength(env, sig);
jbyte *data = (*env)->GetByteArrayElements(env, sig, NULL);
size_t i = 0;
if (data[i++] != 0x30) {//SEQUENCE
(*env)->ReleaseByteArrayElements(env, sig, data, JNI_ABORT);
return false;
}
size_t seq_value_len = 0;
if (!(data[i] & 0x80)) {
seq_value_len = data[i++];
} else {
size_t seq_len_len = data[i++] & 0x7f;
while (seq_len_len > 0) {
seq_value_len |= (data[i++] << (seq_len_len - 1));
seq_len_len--;
}
}
if (data[i++] != 0x02) {//INTEGER
(*env)->ReleaseByteArrayElements(env, sig, data, JNI_ABORT);
return false;
}
size_t r_length = data[i++];
jbyte *r_out = malloc(r_length);
memcpy(r_out, data + i, r_length);
i += r_length;
if (data[i++] != 0x02) {//INTEGER
free(r_out);
(*env)->ReleaseByteArrayElements(env, sig, data, JNI_ABORT);
return false;
}
size_t s_length = data[i++];
jbyte *s_out = malloc(s_length);
memcpy(s_out, data + i, s_length);
i += s_length;
(*env)->ReleaseByteArrayElements(env, sig, data, JNI_ABORT);
if (i != sig_len) {
free(r_out);
free(s_out);
return false;
}
*r_len = r_length;
*r_data = r_out;
*s_len = s_length;
*s_data = s_out;
return true;
}
|
