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1 | /* |
2 | * Copyright 2018 The OpenSSL Project Authors. All Rights Reserved. | |
3 | * | |
4 | * Licensed under the OpenSSL license (the "License"). You may not use | |
5 | * this file except in compliance with the License. You can obtain a copy | |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
8 | */ | |
9 | ||
10 | #include <stdlib.h> | |
11 | #include <string.h> | |
12 | ||
13 | #include "testutil.h" | |
14 | ||
15 | #include <openssl/evp.h> | |
16 | #include <openssl/err.h> | |
17 | #include <openssl/rand.h> | |
18 | ||
19 | #ifndef OPENSSL_NO_DSA | |
20 | #include <openssl/dsa.h> | |
21 | ||
22 | static DSA *dsakey; | |
23 | ||
24 | /* | |
25 | * These parameters are from test/recipes/04-test_pem_data/dsaparam.pem, | |
26 | * converted using dsaparam -C | |
27 | */ | |
28 | static DSA *load_dsa_params(void) | |
29 | { | |
30 | static unsigned char dsap_2048[] = { | |
31 | 0xAE, 0x35, 0x7D, 0x4E, 0x1D, 0x96, 0xE2, 0x9F, 0x00, 0x96, | |
32 | 0x60, 0x5A, 0x6E, 0x4D, 0x07, 0x8D, 0xA5, 0x7C, 0xBC, 0xF9, | |
33 | 0xAD, 0xD7, 0x9F, 0xD5, 0xE9, 0xEE, 0xA6, 0x33, 0x51, 0xDE, | |
34 | 0x7B, 0x72, 0xD2, 0x75, 0xAA, 0x71, 0x77, 0xF1, 0x63, 0xFB, | |
35 | 0xB6, 0xEC, 0x5A, 0xBA, 0x0D, 0x72, 0xA2, 0x1A, 0x1C, 0x64, | |
36 | 0xB8, 0xE5, 0x89, 0x09, 0x6D, 0xC9, 0x6F, 0x0B, 0x7F, 0xD2, | |
37 | 0xCE, 0x9F, 0xEF, 0x87, 0x5A, 0xB6, 0x67, 0x2F, 0xEF, 0xEE, | |
38 | 0xEB, 0x59, 0xF5, 0x5E, 0xFF, 0xA8, 0x28, 0x84, 0x9E, 0x5B, | |
39 | 0x37, 0x09, 0x11, 0x80, 0x7C, 0x08, 0x5C, 0xD5, 0xE1, 0x48, | |
40 | 0x4B, 0xD2, 0x68, 0xFB, 0x3F, 0x9F, 0x2B, 0x6B, 0x6C, 0x0D, | |
41 | 0x48, 0x1B, 0x1A, 0x80, 0xC2, 0xEB, 0x11, 0x1B, 0x37, 0x79, | |
42 | 0xD6, 0x8C, 0x8B, 0x72, 0x3E, 0x67, 0xA5, 0x05, 0x0E, 0x41, | |
43 | 0x8A, 0x9E, 0x35, 0x50, 0xB4, 0xD2, 0x40, 0x27, 0x6B, 0xFD, | |
44 | 0xE0, 0x64, 0x6B, 0x5B, 0x38, 0x42, 0x94, 0xB5, 0x49, 0xDA, | |
45 | 0xEF, 0x6E, 0x78, 0x37, 0xCD, 0x30, 0x89, 0xC3, 0x45, 0x50, | |
46 | 0x7B, 0x9C, 0x8C, 0xE7, 0x1C, 0x98, 0x70, 0x71, 0x5D, 0x79, | |
47 | 0x5F, 0xEF, 0xE8, 0x94, 0x85, 0x53, 0x3E, 0xEF, 0xA3, 0x2C, | |
48 | 0xCE, 0x1A, 0xAB, 0x7D, 0xD6, 0x5E, 0x14, 0xCD, 0x51, 0x54, | |
49 | 0x89, 0x9D, 0x77, 0xE4, 0xF8, 0x22, 0xF0, 0x35, 0x10, 0x75, | |
50 | 0x05, 0x71, 0x51, 0x4F, 0x8C, 0x4C, 0x5C, 0x0D, 0x2C, 0x2C, | |
51 | 0xBE, 0x6C, 0x34, 0xEE, 0x12, 0x82, 0x87, 0x03, 0x19, 0x06, | |
52 | 0x12, 0xA8, 0xAA, 0xF4, 0x0D, 0x3C, 0x49, 0xCC, 0x70, 0x5A, | |
53 | 0xD8, 0x32, 0xEE, 0x32, 0x50, 0x85, 0x70, 0xE8, 0x18, 0xFD, | |
54 | 0x74, 0x80, 0x53, 0x32, 0x57, 0xEE, 0x50, 0xC9, 0xAE, 0xEB, | |
55 | 0xAE, 0xB6, 0x22, 0x32, 0x16, 0x6B, 0x8C, 0x59, 0xDA, 0xEE, | |
56 | 0x1D, 0x33, 0xDF, 0x4C, 0xA2, 0x3D | |
57 | }; | |
58 | static unsigned char dsaq_2048[] = { | |
59 | 0xAD, 0x2D, 0x6E, 0x17, 0xB0, 0xF3, 0xEB, 0xC7, 0xB8, 0xEE, | |
60 | 0x95, 0x78, 0xF2, 0x17, 0xF5, 0x33, 0x01, 0x67, 0xBC, 0xDE, | |
61 | 0x93, 0xFF, 0xEE, 0x40, 0xE8, 0x7F, 0xF1, 0x93, 0x6D, 0x4B, | |
62 | 0x87, 0x13 | |
63 | }; | |
64 | static unsigned char dsag_2048[] = { | |
65 | 0x66, 0x6F, 0xDA, 0x63, 0xA5, 0x8E, 0xD2, 0x4C, 0xD5, 0x45, | |
66 | 0x2D, 0x76, 0x5D, 0x5F, 0xCD, 0x4A, 0xB4, 0x1A, 0x42, 0x35, | |
67 | 0x86, 0x3A, 0x6F, 0xA9, 0xFA, 0x27, 0xAB, 0xDE, 0x03, 0x21, | |
68 | 0x36, 0x0A, 0x07, 0x29, 0xC9, 0x2F, 0x6D, 0x49, 0xA8, 0xF7, | |
69 | 0xC6, 0xF4, 0x92, 0xD7, 0x73, 0xC1, 0xD8, 0x76, 0x0E, 0x61, | |
70 | 0xA7, 0x0B, 0x6E, 0x96, 0xB8, 0xC8, 0xCB, 0x38, 0x35, 0x12, | |
71 | 0x20, 0x79, 0xA5, 0x08, 0x28, 0x35, 0x5C, 0xBC, 0x52, 0x16, | |
72 | 0xAF, 0x52, 0xBA, 0x0F, 0xC3, 0xB1, 0x63, 0x12, 0x27, 0x0B, | |
73 | 0x74, 0xA4, 0x47, 0x43, 0xD6, 0x30, 0xB8, 0x9C, 0x2E, 0x40, | |
74 | 0x14, 0xCD, 0x99, 0x7F, 0xE8, 0x8E, 0x37, 0xB0, 0xA9, 0x3F, | |
75 | 0x54, 0xE9, 0x66, 0x22, 0x61, 0x4C, 0xF8, 0x49, 0x03, 0x57, | |
76 | 0x14, 0x32, 0x1D, 0x37, 0x3D, 0xE2, 0x92, 0xF8, 0x8E, 0xA0, | |
77 | 0x6A, 0x66, 0x63, 0xF0, 0xB0, 0x6E, 0x07, 0x2B, 0x3D, 0xBF, | |
78 | 0xD0, 0x84, 0x6A, 0xAA, 0x1F, 0x30, 0x77, 0x65, 0xE5, 0xFC, | |
79 | 0xF5, 0xEC, 0x55, 0xCE, 0x73, 0xDB, 0xBE, 0xA7, 0x8D, 0x3A, | |
80 | 0x9F, 0x7A, 0xED, 0x4F, 0xAF, 0xA2, 0x80, 0x4C, 0x30, 0x9E, | |
81 | 0x28, 0x49, 0x65, 0x40, 0xF0, 0x03, 0x45, 0x56, 0x99, 0xA2, | |
82 | 0x93, 0x1B, 0x9C, 0x46, 0xDE, 0xBD, 0xA8, 0xAB, 0x5F, 0x90, | |
83 | 0x3F, 0xB7, 0x3F, 0xD4, 0x6F, 0x8D, 0x5A, 0x30, 0xE1, 0xD4, | |
84 | 0x63, 0x3A, 0x6A, 0x7C, 0x8F, 0x24, 0xFC, 0xD9, 0x14, 0x28, | |
85 | 0x09, 0xE4, 0x84, 0x4E, 0x17, 0x43, 0x56, 0xB8, 0xD4, 0x4B, | |
86 | 0xA2, 0x29, 0x45, 0xD3, 0x13, 0xF0, 0xC2, 0x76, 0x9B, 0x01, | |
87 | 0xA0, 0x80, 0x6E, 0x93, 0x63, 0x5E, 0x87, 0x24, 0x20, 0x2A, | |
88 | 0xFF, 0xBB, 0x9F, 0xA8, 0x99, 0x6C, 0xA7, 0x9A, 0x00, 0xB9, | |
89 | 0x7D, 0xDA, 0x66, 0xC9, 0xC0, 0x72, 0x72, 0x22, 0x0F, 0x1A, | |
90 | 0xCC, 0x23, 0xD9, 0xB7, 0x5F, 0x1B | |
91 | }; | |
92 | DSA *dsa = DSA_new(); | |
93 | BIGNUM *p, *q, *g; | |
94 | ||
95 | if (dsa == NULL) | |
96 | return NULL; | |
97 | if (!DSA_set0_pqg(dsa, p = BN_bin2bn(dsap_2048, sizeof(dsap_2048), NULL), | |
98 | q = BN_bin2bn(dsaq_2048, sizeof(dsaq_2048), NULL), | |
99 | g = BN_bin2bn(dsag_2048, sizeof(dsag_2048), NULL))) { | |
100 | DSA_free(dsa); | |
101 | BN_free(p); | |
102 | BN_free(q); | |
103 | BN_free(g); | |
104 | return NULL; | |
105 | } | |
106 | return dsa; | |
107 | } | |
108 | ||
109 | static int genkeys(void) | |
110 | { | |
111 | if (!TEST_ptr(dsakey = load_dsa_params())) | |
112 | return 0; | |
113 | ||
114 | if (!TEST_int_eq(DSA_generate_key(dsakey), 1)) | |
115 | return 0; | |
116 | ||
117 | return 1; | |
118 | } | |
119 | ||
120 | static int sign_and_verify(int len) | |
121 | { | |
122 | /* | |
123 | * Per FIPS 186-4, the hash is recommended to be the same length as q. | |
124 | * If the hash is longer than q, the leftmost N bits are used; if the hash | |
125 | * is shorter, then we left-pad (see appendix C.2.1). | |
126 | */ | |
127 | size_t sigLength; | |
128 | int digestlen = BN_num_bytes(DSA_get0_q(dsakey)); | |
129 | int ok = 0; | |
130 | ||
131 | unsigned char *dataToSign = OPENSSL_malloc(len); | |
132 | unsigned char *paddedData = OPENSSL_malloc(digestlen); | |
133 | unsigned char *signature = NULL; | |
134 | EVP_PKEY_CTX *ctx = NULL; | |
135 | EVP_PKEY *pkey = NULL; | |
136 | ||
137 | if (!TEST_ptr(dataToSign) || | |
138 | !TEST_ptr(paddedData) || | |
139 | !TEST_int_eq(RAND_bytes(dataToSign, len), 1)) | |
140 | goto end; | |
141 | ||
142 | memset(paddedData, 0, digestlen); | |
143 | if (len > digestlen) | |
144 | memcpy(paddedData, dataToSign, digestlen); | |
145 | else | |
146 | memcpy(paddedData + digestlen - len, dataToSign, len); | |
147 | ||
148 | if (!TEST_ptr(pkey = EVP_PKEY_new())) | |
149 | goto end; | |
150 | EVP_PKEY_set1_DSA(pkey, dsakey); | |
151 | ||
152 | if (!TEST_ptr(ctx = EVP_PKEY_CTX_new(pkey, NULL))) | |
153 | goto end; | |
154 | if (!TEST_int_eq(EVP_PKEY_sign_init(ctx), 1)) | |
155 | goto end; | |
156 | ||
157 | if (EVP_PKEY_sign(ctx, NULL, &sigLength, dataToSign, len) != 1) { | |
158 | TEST_error("Failed to get signature length, len=%d", len); | |
159 | goto end; | |
160 | } | |
161 | ||
162 | if (!TEST_ptr(signature = OPENSSL_malloc(sigLength))) | |
163 | goto end; | |
164 | ||
165 | if (EVP_PKEY_sign(ctx, signature, &sigLength, dataToSign, len) != 1) { | |
166 | TEST_error("Failed to sign, len=%d", len); | |
167 | goto end; | |
168 | } | |
169 | ||
170 | /* Check that the signature is okay via the EVP interface */ | |
171 | if (!TEST_int_eq(EVP_PKEY_verify_init(ctx), 1)) | |
172 | goto end; | |
173 | ||
174 | /* ... using the same data we just signed */ | |
175 | if (EVP_PKEY_verify(ctx, signature, sigLength, dataToSign, len) != 1) { | |
176 | TEST_error("EVP verify with unpadded length %d failed\n", len); | |
177 | goto end; | |
178 | } | |
179 | ||
180 | /* ... padding/truncating the data to the appropriate digest size */ | |
181 | if (EVP_PKEY_verify(ctx, signature, sigLength, paddedData, digestlen) != 1) { | |
182 | TEST_error("EVP verify with length %d failed\n", len); | |
183 | goto end; | |
184 | } | |
185 | ||
186 | /* Verify again using the raw DSA interface */ | |
187 | if (DSA_verify(0, dataToSign, len, signature, sigLength, dsakey) != 1) { | |
188 | TEST_error("Verification with unpadded data failed, len=%d", len); | |
189 | goto end; | |
190 | } | |
191 | ||
192 | if (DSA_verify(0, paddedData, digestlen, signature, sigLength, dsakey) != 1) { | |
193 | TEST_error("verify with length %d failed\n", len); | |
194 | goto end; | |
195 | } | |
196 | ||
197 | ok = 1; | |
198 | end: | |
199 | EVP_PKEY_CTX_free(ctx); | |
200 | EVP_PKEY_free(pkey); | |
201 | ||
202 | OPENSSL_free(signature); | |
203 | OPENSSL_free(paddedData); | |
204 | OPENSSL_free(dataToSign); | |
205 | ||
206 | return ok; | |
207 | } | |
208 | ||
209 | static int dsa_exact_size_test(void) { | |
210 | /* | |
211 | * For a 2048-bit p, q should be either 224 or 256 bits per the table in | |
212 | * FIPS 186-4 4.2. | |
213 | */ | |
214 | ||
215 | return sign_and_verify(224 / 8) && sign_and_verify(256 / 8); | |
216 | } | |
217 | ||
218 | static int dsa_small_digest_test(void) { | |
219 | return sign_and_verify(16) && sign_and_verify(1); | |
220 | } | |
221 | ||
222 | static int dsa_large_digest_test(void) { | |
223 | return sign_and_verify(33) && sign_and_verify(64); | |
224 | } | |
225 | ||
226 | void cleanup_tests(void) | |
227 | { | |
228 | DSA_free(dsakey); | |
229 | } | |
230 | ||
231 | #endif /* OPENSSL_NO_DSA */ | |
232 | ||
233 | int setup_tests(void) | |
234 | { | |
235 | #ifndef OPENSSL_NO_DSA | |
236 | if (!genkeys()) | |
237 | return 0; | |
238 | ||
239 | ADD_TEST(dsa_exact_size_test); | |
240 | ADD_TEST(dsa_small_digest_test); | |
241 | ADD_TEST(dsa_large_digest_test); | |
242 | #endif | |
243 | return 1; | |
244 | } | |
245 |