OpenCoverage

dsa_pmeth.c

Absolute File Name:/home/opencoverage/opencoverage/guest-scripts/libressl/src/crypto/dsa/dsa_pmeth.c
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1/* $OpenBSD: dsa_pmeth.c,v 1.11 2017/01/29 17:49:22 beck Exp $ */-
2/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL-
3 * project 2006.-
4 */-
5/* ====================================================================-
6 * Copyright (c) 2006 The OpenSSL Project. All rights reserved.-
7 *-
8 * Redistribution and use in source and binary forms, with or without-
9 * modification, are permitted provided that the following conditions-
10 * are met:-
11 *-
12 * 1. Redistributions of source code must retain the above copyright-
13 * notice, this list of conditions and the following disclaimer. -
14 *-
15 * 2. Redistributions in binary form must reproduce the above copyright-
16 * notice, this list of conditions and the following disclaimer in-
17 * the documentation and/or other materials provided with the-
18 * distribution.-
19 *-
20 * 3. All advertising materials mentioning features or use of this-
21 * software must display the following acknowledgment:-
22 * "This product includes software developed by the OpenSSL Project-
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"-
24 *-
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to-
26 * endorse or promote products derived from this software without-
27 * prior written permission. For written permission, please contact-
28 * licensing@OpenSSL.org.-
29 *-
30 * 5. Products derived from this software may not be called "OpenSSL"-
31 * nor may "OpenSSL" appear in their names without prior written-
32 * permission of the OpenSSL Project.-
33 *-
34 * 6. Redistributions of any form whatsoever must retain the following-
35 * acknowledgment:-
36 * "This product includes software developed by the OpenSSL Project-
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"-
38 *-
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY-
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE-
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR-
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR-
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,-
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT-
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;-
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)-
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,-
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)-
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED-
50 * OF THE POSSIBILITY OF SUCH DAMAGE.-
51 * ====================================================================-
52 *-
53 * This product includes cryptographic software written by Eric Young-
54 * (eay@cryptsoft.com). This product includes software written by Tim-
55 * Hudson (tjh@cryptsoft.com).-
56 *-
57 */-
58-
59#include <limits.h>-
60#include <stdio.h>-
61#include <string.h>-
62-
63#include <openssl/asn1t.h>-
64#include <openssl/bn.h>-
65#include <openssl/err.h>-
66#include <openssl/evp.h>-
67#include <openssl/x509.h>-
68-
69#include "dsa_locl.h"-
70#include "evp_locl.h"-
71-
72/* DSA pkey context structure */-
73-
74typedef struct {-
75 /* Parameter gen parameters */-
76 int nbits; /* size of p in bits (default: 1024) */-
77 int qbits; /* size of q in bits (default: 160) */-
78 const EVP_MD *pmd; /* MD for parameter generation */-
79 /* Keygen callback info */-
80 int gentmp[2];-
81 /* message digest */-
82 const EVP_MD *md; /* MD for the signature */-
83} DSA_PKEY_CTX;-
84-
85static int-
86pkey_dsa_init(EVP_PKEY_CTX *ctx)-
87{-
88 DSA_PKEY_CTX *dctx;-
89-
90 dctx = malloc(sizeof(DSA_PKEY_CTX));-
91 if (!dctx)
!dctxDescription
TRUEnever evaluated
FALSEevaluated 3 times by 1 test
Evaluated by:
  • libcrypto.so.44.0.1
0-3
92 return 0;
never executed: return 0;
0
93 dctx->nbits = 1024;-
94 dctx->qbits = 160;-
95 dctx->pmd = NULL;-
96 dctx->md = NULL;-
97-
98 ctx->data = dctx;-
99 ctx->keygen_info = dctx->gentmp;-
100 ctx->keygen_info_count = 2;-
101 -
102 return 1;
executed 3 times by 1 test: return 1;
Executed by:
  • libcrypto.so.44.0.1
3
103}-
104-
105static int-
106pkey_dsa_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)-
107{-
108 DSA_PKEY_CTX *dctx, *sctx;-
109-
110 if (!pkey_dsa_init(dst))
!pkey_dsa_init(dst)Description
TRUEnever evaluated
FALSEevaluated 1 time by 1 test
Evaluated by:
  • libcrypto.so.44.0.1
0-1
111 return 0;
never executed: return 0;
0
112 sctx = src->data;-
113 dctx = dst->data;-
114 dctx->nbits = sctx->nbits;-
115 dctx->qbits = sctx->qbits;-
116 dctx->pmd = sctx->pmd;-
117 dctx->md = sctx->md;-
118 return 1;
executed 1 time by 1 test: return 1;
Executed by:
  • libcrypto.so.44.0.1
1
119}-
120-
121static void-
122pkey_dsa_cleanup(EVP_PKEY_CTX *ctx)-
123{-
124 DSA_PKEY_CTX *dctx = ctx->data;-
125-
126 free(dctx);-
127}
executed 3 times by 1 test: end of block
Executed by:
  • libcrypto.so.44.0.1
3
128-
129static int-
130pkey_dsa_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,-
131 const unsigned char *tbs, size_t tbslen)-
132{-
133 int ret, type;-
134 unsigned int sltmp;-
135 DSA_PKEY_CTX *dctx = ctx->data;-
136 DSA *dsa = ctx->pkey->pkey.dsa;-
137-
138 if (dctx->md)
dctx->mdDescription
TRUEevaluated 1 time by 1 test
Evaluated by:
  • libcrypto.so.44.0.1
FALSEnever evaluated
0-1
139 type = EVP_MD_type(dctx->md);
executed 1 time by 1 test: type = EVP_MD_type(dctx->md);
Executed by:
  • libcrypto.so.44.0.1
1
140 else-
141 type = NID_sha1;
never executed: type = 64;
0
142-
143 ret = DSA_sign(type, tbs, tbslen, sig, &sltmp, dsa);-
144-
145 if (ret <= 0)
ret <= 0Description
TRUEnever evaluated
FALSEevaluated 1 time by 1 test
Evaluated by:
  • libcrypto.so.44.0.1
0-1
146 return ret;
never executed: return ret;
0
147 *siglen = sltmp;-
148 return 1;
executed 1 time by 1 test: return 1;
Executed by:
  • libcrypto.so.44.0.1
1
149}-
150-
151static int-
152pkey_dsa_verify(EVP_PKEY_CTX *ctx, const unsigned char *sig, size_t siglen,-
153 const unsigned char *tbs, size_t tbslen)-
154{-
155 int ret, type;-
156 DSA_PKEY_CTX *dctx = ctx->data;-
157 DSA *dsa = ctx->pkey->pkey.dsa;-
158-
159 if (dctx->md)
dctx->mdDescription
TRUEnever evaluated
FALSEnever evaluated
0
160 type = EVP_MD_type(dctx->md);
never executed: type = EVP_MD_type(dctx->md);
0
161 else-
162 type = NID_sha1;
never executed: type = 64;
0
163-
164 ret = DSA_verify(type, tbs, tbslen, sig, siglen, dsa);-
165-
166 return ret;
never executed: return ret;
0
167}-
168-
169static int-
170pkey_dsa_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)-
171{-
172 DSA_PKEY_CTX *dctx = ctx->data;-
173-
174 switch (type) {-
175 case EVP_PKEY_CTRL_DSA_PARAMGEN_BITS:
never executed: case (0x1000 + 1):
0
176 if (p1 < 256)
p1 < 256Description
TRUEnever evaluated
FALSEnever evaluated
0
177 return -2;
never executed: return -2;
0
178 dctx->nbits = p1;-
179 return 1;
never executed: return 1;
0
180-
181 case EVP_PKEY_CTRL_DSA_PARAMGEN_Q_BITS:
never executed: case (0x1000 + 2):
0
182 if (p1 != 160 && p1 != 224 && p1 && p1 != 256)
p1 != 160Description
TRUEnever evaluated
FALSEnever evaluated
p1 != 224Description
TRUEnever evaluated
FALSEnever evaluated
p1Description
TRUEnever evaluated
FALSEnever evaluated
p1 != 256Description
TRUEnever evaluated
FALSEnever evaluated
0
183 return -2;
never executed: return -2;
0
184 dctx->qbits = p1;-
185 return 1;
never executed: return 1;
0
186-
187 case EVP_PKEY_CTRL_DSA_PARAMGEN_MD:
never executed: case (0x1000 + 3):
0
188 switch (EVP_MD_type((const EVP_MD *)p2)) {-
189 case NID_sha1:
never executed: case 64:
0
190 case NID_sha224:
never executed: case 675:
0
191 case NID_sha256:
never executed: case 672:
0
192 break;
never executed: break;
0
193 default:
never executed: default:
0
194 DSAerror(DSA_R_INVALID_DIGEST_TYPE);-
195 return 0;
never executed: return 0;
0
196 }-
197 dctx->md = p2;-
198 return 1;
never executed: return 1;
0
199-
200 case EVP_PKEY_CTRL_MD:
executed 1 time by 1 test: case 1:
Executed by:
  • libcrypto.so.44.0.1
1
201 switch (EVP_MD_type((const EVP_MD *)p2)) {-
202 case NID_sha1:
never executed: case 64:
0
203 case NID_dsa:
never executed: case 116:
0
204 case NID_dsaWithSHA:
never executed: case 66:
0
205 case NID_sha224:
never executed: case 675:
0
206 case NID_sha256:
executed 1 time by 1 test: case 672:
Executed by:
  • libcrypto.so.44.0.1
1
207 case NID_sha384:
never executed: case 673:
0
208 case NID_sha512:
never executed: case 674:
0
209 break;
executed 1 time by 1 test: break;
Executed by:
  • libcrypto.so.44.0.1
1
210 default:
never executed: default:
0
211 DSAerror(DSA_R_INVALID_DIGEST_TYPE);-
212 return 0;
never executed: return 0;
0
213 }-
214 dctx->md = p2;-
215 return 1;
executed 1 time by 1 test: return 1;
Executed by:
  • libcrypto.so.44.0.1
1
216-
217 case EVP_PKEY_CTRL_DIGESTINIT:
executed 1 time by 1 test: case 7:
Executed by:
  • libcrypto.so.44.0.1
1
218 case EVP_PKEY_CTRL_PKCS7_SIGN:
never executed: case 5:
0
219 case EVP_PKEY_CTRL_CMS_SIGN:
never executed: case 11:
0
220 return 1;
executed 1 time by 1 test: return 1;
Executed by:
  • libcrypto.so.44.0.1
1
221 -
222 case EVP_PKEY_CTRL_PEER_KEY:
never executed: case 2:
0
223 DSAerror(EVP_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE);-
224 return -2;
never executed: return -2;
0
225 default:
never executed: default:
0
226 return -2;
never executed: return -2;
0
227 }-
228}-
229 -
230static int-
231pkey_dsa_ctrl_str(EVP_PKEY_CTX *ctx, const char *type, const char *value)-
232{-
233 long lval;-
234 char *ep;-
235-
236 if (!strcmp(type, "dsa_paramgen_bits")) {
never executed: __result = (((const unsigned char *) (const char *) ( type ))[3] - __s2[3]);
never executed: end of block
never executed: end of block
never executed: __result = (((const unsigned char *) (const char *) ( "dsa_paramgen_bits" ))[3] - __s2[3]);
never executed: end of block
never executed: end of block
! __extension_...bits" )))); })Description
TRUEnever evaluated
FALSEnever evaluated
__s1_len > 0Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
__s1_len > 1Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
__s1_len > 2Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
__s2_len > 0Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
__s2_len > 1Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
__s2_len > 2Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
237 int nbits;-
238-
239 errno = 0;-
240 lval = strtol(value, &ep, 10);-
241 if (value[0] == '\0' || *ep != '\0')
value[0] == '\0'Description
TRUEnever evaluated
FALSEnever evaluated
*ep != '\0'Description
TRUEnever evaluated
FALSEnever evaluated
0
242 goto not_a_number;
never executed: goto not_a_number;
0
243 if ((errno == ERANGE &&
(*__errno_location ()) == 34Description
TRUEnever evaluated
FALSEnever evaluated
0
244 (lval == LONG_MAX || lval == LONG_MIN)) ||
lval == 0x7fffffffffffffffLDescription
TRUEnever evaluated
FALSEnever evaluated
lval == (-0x7f...fffffffL - 1L)Description
TRUEnever evaluated
FALSEnever evaluated
0
245 (lval > INT_MAX || lval < INT_MIN))
lval > 0x7fffffffDescription
TRUEnever evaluated
FALSEnever evaluated
lval < (-0x7fffffff - 1)Description
TRUEnever evaluated
FALSEnever evaluated
0
246 goto out_of_range;
never executed: goto out_of_range;
0
247 nbits = lval;-
248 return EVP_PKEY_CTX_set_dsa_paramgen_bits(ctx, nbits);
never executed: return EVP_PKEY_CTX_ctrl(ctx, 116, (1<<1), (0x1000 + 1), nbits, ((void *)0) );
0
249 } else if (!strcmp(type, "dsa_paramgen_q_bits")) {
never executed: __result = (((const unsigned char *) (const char *) ( type ))[3] - __s2[3]);
never executed: end of block
never executed: end of block
never executed: __result = (((const unsigned char *) (const char *) ( "dsa_paramgen_q_bits" ))[3] - __s2[3]);
never executed: end of block
never executed: end of block
! __extension_...bits" )))); })Description
TRUEnever evaluated
FALSEnever evaluated
__s1_len > 0Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
__s1_len > 1Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
__s1_len > 2Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
__s2_len > 0Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
__s2_len > 1Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
__s2_len > 2Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
250 int qbits;-
251-
252 errno = 0;-
253 lval = strtol(value, &ep, 10);-
254 if (value[0] == '\0' || *ep != '\0')
value[0] == '\0'Description
TRUEnever evaluated
FALSEnever evaluated
*ep != '\0'Description
TRUEnever evaluated
FALSEnever evaluated
0
255 goto not_a_number;
never executed: goto not_a_number;
0
256 if ((errno == ERANGE &&
(*__errno_location ()) == 34Description
TRUEnever evaluated
FALSEnever evaluated
0
257 (lval == LONG_MAX || lval == LONG_MIN)) ||
lval == 0x7fffffffffffffffLDescription
TRUEnever evaluated
FALSEnever evaluated
lval == (-0x7f...fffffffL - 1L)Description
TRUEnever evaluated
FALSEnever evaluated
0
258 (lval > INT_MAX || lval < INT_MIN))
lval > 0x7fffffffDescription
TRUEnever evaluated
FALSEnever evaluated
lval < (-0x7fffffff - 1)Description
TRUEnever evaluated
FALSEnever evaluated
0
259 goto out_of_range;
never executed: goto out_of_range;
0
260 qbits = lval;-
261 return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DSA,
never executed: return EVP_PKEY_CTX_ctrl(ctx, 116, (1<<1), (0x1000 + 2), qbits, ((void *)0) );
0
262 EVP_PKEY_OP_PARAMGEN, EVP_PKEY_CTRL_DSA_PARAMGEN_Q_BITS,
never executed: return EVP_PKEY_CTX_ctrl(ctx, 116, (1<<1), (0x1000 + 2), qbits, ((void *)0) );
0
263 qbits, NULL);
never executed: return EVP_PKEY_CTX_ctrl(ctx, 116, (1<<1), (0x1000 + 2), qbits, ((void *)0) );
0
264 } else if (!strcmp(type, "dsa_paramgen_md")) {
never executed: __result = (((const unsigned char *) (const char *) ( type ))[3] - __s2[3]);
never executed: end of block
never executed: end of block
never executed: __result = (((const unsigned char *) (const char *) ( "dsa_paramgen_md" ))[3] - __s2[3]);
never executed: end of block
never executed: end of block
! __extension_...n_md" )))); })Description
TRUEnever evaluated
FALSEnever evaluated
__s1_len > 0Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
__s1_len > 1Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
__s1_len > 2Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
__s2_len > 0Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
__s2_len > 1Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
__s2_len > 2Description
TRUEnever evaluated
FALSEnever evaluated
__result == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
265 return EVP_PKEY_CTX_ctrl(ctx, EVP_PKEY_DSA,
never executed: return EVP_PKEY_CTX_ctrl(ctx, 116, (1<<1), (0x1000 + 3), 0, (void *)EVP_get_digestbyname(value));
0
266 EVP_PKEY_OP_PARAMGEN, EVP_PKEY_CTRL_DSA_PARAMGEN_MD, 0,
never executed: return EVP_PKEY_CTX_ctrl(ctx, 116, (1<<1), (0x1000 + 3), 0, (void *)EVP_get_digestbyname(value));
0
267 (void *)EVP_get_digestbyname(value));
never executed: return EVP_PKEY_CTX_ctrl(ctx, 116, (1<<1), (0x1000 + 3), 0, (void *)EVP_get_digestbyname(value));
0
268 }-
269not_a_number:
code before this statement never executed: not_a_number:
0
270out_of_range:-
271 return -2;
never executed: return -2;
0
272}-
273-
274static int-
275pkey_dsa_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)-
276{-
277 DSA *dsa = NULL;-
278 DSA_PKEY_CTX *dctx = ctx->data;-
279 BN_GENCB *pcb, cb;-
280 int ret;-
281-
282 if (ctx->pkey_gencb) {
ctx->pkey_gencbDescription
TRUEnever evaluated
FALSEnever evaluated
0
283 pcb = &cb;-
284 evp_pkey_set_cb_translate(pcb, ctx);-
285 } else
never executed: end of block
0
286 pcb = NULL;
never executed: pcb = ((void *)0) ;
0
287 dsa = DSA_new();-
288 if (!dsa)
!dsaDescription
TRUEnever evaluated
FALSEnever evaluated
0
289 return 0;
never executed: return 0;
0
290 ret = dsa_builtin_paramgen(dsa, dctx->nbits, dctx->qbits, dctx->pmd,-
291 NULL, 0, NULL, NULL, NULL, pcb);-
292 if (ret)
retDescription
TRUEnever evaluated
FALSEnever evaluated
0
293 EVP_PKEY_assign_DSA(pkey, dsa);
never executed: EVP_PKEY_assign((pkey),116, (char *)(dsa));
0
294 else-
295 DSA_free(dsa);
never executed: DSA_free(dsa);
0
296 return ret;
never executed: return ret;
0
297}-
298-
299static int-
300pkey_dsa_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)-
301{-
302 DSA *dsa = NULL;-
303-
304 if (ctx->pkey == NULL) {
ctx->pkey == ((void *)0)Description
TRUEnever evaluated
FALSEevaluated 1 time by 1 test
Evaluated by:
  • libcrypto.so.44.0.1
0-1
305 DSAerror(DSA_R_NO_PARAMETERS_SET);-
306 return 0;
never executed: return 0;
0
307 }-
308 dsa = DSA_new();-
309 if (!dsa)
!dsaDescription
TRUEnever evaluated
FALSEevaluated 1 time by 1 test
Evaluated by:
  • libcrypto.so.44.0.1
0-1
310 return 0;
never executed: return 0;
0
311 EVP_PKEY_assign_DSA(pkey, dsa);-
312 /* Note: if error return, pkey is freed by parent routine */-
313 if (!EVP_PKEY_copy_parameters(pkey, ctx->pkey))
!EVP_PKEY_copy...ey, ctx->pkey)Description
TRUEnever evaluated
FALSEevaluated 1 time by 1 test
Evaluated by:
  • libcrypto.so.44.0.1
0-1
314 return 0;
never executed: return 0;
0
315 return DSA_generate_key(pkey->pkey.dsa);
executed 1 time by 1 test: return DSA_generate_key(pkey->pkey.dsa);
Executed by:
  • libcrypto.so.44.0.1
1
316}-
317-
318const EVP_PKEY_METHOD dsa_pkey_meth = {-
319 .pkey_id = EVP_PKEY_DSA,-
320 .flags = EVP_PKEY_FLAG_AUTOARGLEN,-
321-
322 .init = pkey_dsa_init,-
323 .copy = pkey_dsa_copy,-
324 .cleanup = pkey_dsa_cleanup,-
325-
326 .paramgen = pkey_dsa_paramgen,-
327-
328 .keygen = pkey_dsa_keygen,-
329-
330 .sign = pkey_dsa_sign,-
331-
332 .verify = pkey_dsa_verify,-
333-
334 .ctrl = pkey_dsa_ctrl,-
335 .ctrl_str = pkey_dsa_ctrl_str-
336};-
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