summaryrefslogtreecommitdiff
path: root/ext/openssl/ossl_pkey.c
blob: f9f8c0ad5ec217b62a4d76c27fe3ada07fd918c9 (plain)
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
/*
 * $Id$
 * 'OpenSSL for Ruby' project
 * Copyright (C) 2001-2002  Michal Rokos <m.rokos@sh.cvut.cz>
 * All rights reserved.
 */
/*
 * This program is licenced under the same licence as Ruby.
 * (See the file 'LICENCE'.)
 */
#include "ossl.h"

/*
 * Classes
 */
VALUE mPKey;
VALUE cPKey;
VALUE ePKeyError;
ID id_private_q;

/*
 * callback for generating keys
 */
void
ossl_generate_cb(int p, int n, void *arg)
{
    VALUE ary;

    ary = rb_ary_new2(2);
    rb_ary_store(ary, 0, INT2NUM(p));
    rb_ary_store(ary, 1, INT2NUM(n));

    rb_yield(ary);
}

/*
 * Public
 */
VALUE
ossl_pkey_new(EVP_PKEY *pkey)
{
    if (!pkey) {
	ossl_raise(ePKeyError, "Cannot make new key from NULL.");
    }
    switch (EVP_PKEY_type(pkey->type)) {
#if !defined(OPENSSL_NO_RSA)
    case EVP_PKEY_RSA:
	return ossl_rsa_new(pkey);
#endif
#if !defined(OPENSSL_NO_DSA)
    case EVP_PKEY_DSA:
	return ossl_dsa_new(pkey);
#endif
#if !defined(OPENSSL_NO_DH)
    case EVP_PKEY_DH:
	return ossl_dh_new(pkey);
#endif
    default:
	ossl_raise(ePKeyError, "unsupported key type");
    }
    return Qnil; /* not reached */
}

VALUE
ossl_pkey_new_from_file(VALUE filename)
{
    FILE *fp;
    EVP_PKEY *pkey;

    SafeStringValue(filename);
    if (!(fp = fopen(RSTRING(filename)->ptr, "r"))) {
	ossl_raise(ePKeyError, "%s", strerror(errno));
    }

    pkey = PEM_read_PrivateKey(fp, NULL, ossl_pem_passwd_cb, NULL);
    fclose(fp);
    if (!pkey) {
	ossl_raise(ePKeyError, NULL);
    }

    return ossl_pkey_new(pkey);
}

EVP_PKEY *
GetPKeyPtr(VALUE obj)
{
    EVP_PKEY *pkey;

    SafeGetPKey(obj, pkey);

    return pkey;
}

EVP_PKEY *
GetPrivPKeyPtr(VALUE obj)
{
    EVP_PKEY *pkey;
	
    SafeGetPKey(obj, pkey);
    if (rb_funcall(obj, id_private_q, 0, NULL) != Qtrue) { /* returns Qtrue */
	ossl_raise(rb_eArgError, "Private key is needed.");
    }

    return pkey;
}

EVP_PKEY *
DupPrivPKeyPtr(VALUE obj)
{
    EVP_PKEY *pkey;
	
    SafeGetPKey(obj, pkey);
    if (rb_funcall(obj, id_private_q, 0, NULL) != Qtrue) { /* returns Qtrue */
	ossl_raise(rb_eArgError, "Private key is needed.");
    }
    CRYPTO_add(&pkey->references, 1, CRYPTO_LOCK_EVP_PKEY);

    return pkey;
}

/*
 * Private
 */
static VALUE
ossl_pkey_alloc(VALUE klass)
{
    EVP_PKEY *pkey;
    VALUE obj;

    if (!(pkey = EVP_PKEY_new())) {
	ossl_raise(ePKeyError, NULL);
    }
    WrapPKey(klass, obj, pkey);

    return obj;
}

static VALUE
ossl_pkey_initialize(VALUE self)
{
    if (rb_obj_is_instance_of(self, cPKey)) {
	ossl_raise(rb_eNotImpError, "OpenSSL::PKey::PKey is an abstract class.");
    }
    return self;
}

static VALUE
ossl_pkey_to_der(VALUE self)
{
    EVP_PKEY *pkey;
    VALUE str;
    BIO *out;
    BUF_MEM *buf;
    
    GetPKey(self, pkey);

    out = BIO_new(BIO_s_mem());
    if (!out) ossl_raise(ePKeyError, NULL);

    if (!i2d_PUBKEY_bio(out, pkey)) {
	BIO_free(out);
	ossl_raise(ePKeyError, NULL);
    }
    
    BIO_get_mem_ptr(out, &buf);
    str = rb_str_new(buf->data, buf->length);

    BIO_free(out);

    return str;
}

static VALUE
ossl_pkey_sign(VALUE self, VALUE digest, VALUE data)
{
    EVP_PKEY *pkey;
    EVP_MD_CTX ctx;
    char *buf;
    int buf_len;
    VALUE str;

    GetPKey(self, pkey);
    if (rb_funcall(self, id_private_q, 0, NULL) != Qtrue) {
	ossl_raise(rb_eArgError, "Private key is needed.");
    }
    EVP_SignInit(&ctx, GetDigestPtr(digest));
    StringValue(data);
    EVP_SignUpdate(&ctx, RSTRING(data)->ptr, RSTRING(data)->len);
    if (!(buf = OPENSSL_malloc(EVP_PKEY_size(pkey) + 16))) {
	ossl_raise(ePKeyError, NULL);
    }
    if (!EVP_SignFinal(&ctx, buf, &buf_len, pkey)) {
	OPENSSL_free(buf);
	ossl_raise(ePKeyError, NULL);
    }	
    str = rb_str_new(buf, buf_len);
    OPENSSL_free(buf);

    return str;
}

static VALUE
ossl_pkey_verify(VALUE self, VALUE digest, VALUE sig, VALUE data)
{
    EVP_PKEY *pkey;
    EVP_MD_CTX ctx;

    GetPKey(self, pkey);
    EVP_VerifyInit(&ctx, GetDigestPtr(digest));
    StringValue(sig);
    StringValue(data);
    EVP_VerifyUpdate(&ctx, RSTRING(data)->ptr, RSTRING(data)->len);
    switch (EVP_VerifyFinal(&ctx, RSTRING(sig)->ptr, RSTRING(sig)->len, pkey)) {
    case 0:
	return Qfalse;
    case 1:
	return Qtrue;
    default:
	ossl_raise(ePKeyError, NULL);
    }
    return Qnil; /* dummy */
}

/*
 * INIT
 */
void
Init_ossl_pkey()
{
    mPKey = rb_define_module_under(mOSSL, "PKey");
	
    ePKeyError = rb_define_class_under(mPKey, "PKeyError", eOSSLError);

    cPKey = rb_define_class_under(mPKey, "PKey", rb_cObject);
	
    rb_define_alloc_func(cPKey, ossl_pkey_alloc);
    rb_define_method(cPKey, "initialize", ossl_pkey_initialize, 0);

    rb_define_method(cPKey, "to_der", ossl_pkey_to_der, 0);
    rb_define_method(cPKey, "sign", ossl_pkey_sign, 2);
    rb_define_method(cPKey, "verify", ossl_pkey_verify, 3);
	
    id_private_q = rb_intern("private?");
	
    /*
     * INIT rsa, dsa
     */
    Init_ossl_rsa();
    Init_ossl_dsa();
    Init_ossl_dh();
}