1/* 2 * Copyright 2018-2020 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the Apache License 2.0 (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/* 11 * DSA low level APIs are deprecated for public use, but still ok for 12 * internal use. 13 */ 14#include "internal/deprecated.h" 15 16#include <stdlib.h> 17#include <string.h> 18 19#include "testutil.h" 20 21#include <openssl/evp.h> 22#include <openssl/err.h> 23#include <openssl/rand.h> 24 25#ifndef OPENSSL_NO_DSA 26#include <openssl/dsa.h> 27 28static DSA *dsakey; 29 30/* 31 * These parameters are from test/recipes/04-test_pem_data/dsaparam.pem, 32 * converted using dsaparam -C 33 */ 34static DSA *load_dsa_params(void) 35{ 36 static unsigned char dsap_2048[] = { 37 0xAE, 0x35, 0x7D, 0x4E, 0x1D, 0x96, 0xE2, 0x9F, 0x00, 0x96, 38 0x60, 0x5A, 0x6E, 0x4D, 0x07, 0x8D, 0xA5, 0x7C, 0xBC, 0xF9, 39 0xAD, 0xD7, 0x9F, 0xD5, 0xE9, 0xEE, 0xA6, 0x33, 0x51, 0xDE, 40 0x7B, 0x72, 0xD2, 0x75, 0xAA, 0x71, 0x77, 0xF1, 0x63, 0xFB, 41 0xB6, 0xEC, 0x5A, 0xBA, 0x0D, 0x72, 0xA2, 0x1A, 0x1C, 0x64, 42 0xB8, 0xE5, 0x89, 0x09, 0x6D, 0xC9, 0x6F, 0x0B, 0x7F, 0xD2, 43 0xCE, 0x9F, 0xEF, 0x87, 0x5A, 0xB6, 0x67, 0x2F, 0xEF, 0xEE, 44 0xEB, 0x59, 0xF5, 0x5E, 0xFF, 0xA8, 0x28, 0x84, 0x9E, 0x5B, 45 0x37, 0x09, 0x11, 0x80, 0x7C, 0x08, 0x5C, 0xD5, 0xE1, 0x48, 46 0x4B, 0xD2, 0x68, 0xFB, 0x3F, 0x9F, 0x2B, 0x6B, 0x6C, 0x0D, 47 0x48, 0x1B, 0x1A, 0x80, 0xC2, 0xEB, 0x11, 0x1B, 0x37, 0x79, 48 0xD6, 0x8C, 0x8B, 0x72, 0x3E, 0x67, 0xA5, 0x05, 0x0E, 0x41, 49 0x8A, 0x9E, 0x35, 0x50, 0xB4, 0xD2, 0x40, 0x27, 0x6B, 0xFD, 50 0xE0, 0x64, 0x6B, 0x5B, 0x38, 0x42, 0x94, 0xB5, 0x49, 0xDA, 51 0xEF, 0x6E, 0x78, 0x37, 0xCD, 0x30, 0x89, 0xC3, 0x45, 0x50, 52 0x7B, 0x9C, 0x8C, 0xE7, 0x1C, 0x98, 0x70, 0x71, 0x5D, 0x79, 53 0x5F, 0xEF, 0xE8, 0x94, 0x85, 0x53, 0x3E, 0xEF, 0xA3, 0x2C, 54 0xCE, 0x1A, 0xAB, 0x7D, 0xD6, 0x5E, 0x14, 0xCD, 0x51, 0x54, 55 0x89, 0x9D, 0x77, 0xE4, 0xF8, 0x22, 0xF0, 0x35, 0x10, 0x75, 56 0x05, 0x71, 0x51, 0x4F, 0x8C, 0x4C, 0x5C, 0x0D, 0x2C, 0x2C, 57 0xBE, 0x6C, 0x34, 0xEE, 0x12, 0x82, 0x87, 0x03, 0x19, 0x06, 58 0x12, 0xA8, 0xAA, 0xF4, 0x0D, 0x3C, 0x49, 0xCC, 0x70, 0x5A, 59 0xD8, 0x32, 0xEE, 0x32, 0x50, 0x85, 0x70, 0xE8, 0x18, 0xFD, 60 0x74, 0x80, 0x53, 0x32, 0x57, 0xEE, 0x50, 0xC9, 0xAE, 0xEB, 61 0xAE, 0xB6, 0x22, 0x32, 0x16, 0x6B, 0x8C, 0x59, 0xDA, 0xEE, 62 0x1D, 0x33, 0xDF, 0x4C, 0xA2, 0x3D 63 }; 64 static unsigned char dsaq_2048[] = { 65 0xAD, 0x2D, 0x6E, 0x17, 0xB0, 0xF3, 0xEB, 0xC7, 0xB8, 0xEE, 66 0x95, 0x78, 0xF2, 0x17, 0xF5, 0x33, 0x01, 0x67, 0xBC, 0xDE, 67 0x93, 0xFF, 0xEE, 0x40, 0xE8, 0x7F, 0xF1, 0x93, 0x6D, 0x4B, 68 0x87, 0x13 69 }; 70 static unsigned char dsag_2048[] = { 71 0x66, 0x6F, 0xDA, 0x63, 0xA5, 0x8E, 0xD2, 0x4C, 0xD5, 0x45, 72 0x2D, 0x76, 0x5D, 0x5F, 0xCD, 0x4A, 0xB4, 0x1A, 0x42, 0x35, 73 0x86, 0x3A, 0x6F, 0xA9, 0xFA, 0x27, 0xAB, 0xDE, 0x03, 0x21, 74 0x36, 0x0A, 0x07, 0x29, 0xC9, 0x2F, 0x6D, 0x49, 0xA8, 0xF7, 75 0xC6, 0xF4, 0x92, 0xD7, 0x73, 0xC1, 0xD8, 0x76, 0x0E, 0x61, 76 0xA7, 0x0B, 0x6E, 0x96, 0xB8, 0xC8, 0xCB, 0x38, 0x35, 0x12, 77 0x20, 0x79, 0xA5, 0x08, 0x28, 0x35, 0x5C, 0xBC, 0x52, 0x16, 78 0xAF, 0x52, 0xBA, 0x0F, 0xC3, 0xB1, 0x63, 0x12, 0x27, 0x0B, 79 0x74, 0xA4, 0x47, 0x43, 0xD6, 0x30, 0xB8, 0x9C, 0x2E, 0x40, 80 0x14, 0xCD, 0x99, 0x7F, 0xE8, 0x8E, 0x37, 0xB0, 0xA9, 0x3F, 81 0x54, 0xE9, 0x66, 0x22, 0x61, 0x4C, 0xF8, 0x49, 0x03, 0x57, 82 0x14, 0x32, 0x1D, 0x37, 0x3D, 0xE2, 0x92, 0xF8, 0x8E, 0xA0, 83 0x6A, 0x66, 0x63, 0xF0, 0xB0, 0x6E, 0x07, 0x2B, 0x3D, 0xBF, 84 0xD0, 0x84, 0x6A, 0xAA, 0x1F, 0x30, 0x77, 0x65, 0xE5, 0xFC, 85 0xF5, 0xEC, 0x55, 0xCE, 0x73, 0xDB, 0xBE, 0xA7, 0x8D, 0x3A, 86 0x9F, 0x7A, 0xED, 0x4F, 0xAF, 0xA2, 0x80, 0x4C, 0x30, 0x9E, 87 0x28, 0x49, 0x65, 0x40, 0xF0, 0x03, 0x45, 0x56, 0x99, 0xA2, 88 0x93, 0x1B, 0x9C, 0x46, 0xDE, 0xBD, 0xA8, 0xAB, 0x5F, 0x90, 89 0x3F, 0xB7, 0x3F, 0xD4, 0x6F, 0x8D, 0x5A, 0x30, 0xE1, 0xD4, 90 0x63, 0x3A, 0x6A, 0x7C, 0x8F, 0x24, 0xFC, 0xD9, 0x14, 0x28, 91 0x09, 0xE4, 0x84, 0x4E, 0x17, 0x43, 0x56, 0xB8, 0xD4, 0x4B, 92 0xA2, 0x29, 0x45, 0xD3, 0x13, 0xF0, 0xC2, 0x76, 0x9B, 0x01, 93 0xA0, 0x80, 0x6E, 0x93, 0x63, 0x5E, 0x87, 0x24, 0x20, 0x2A, 94 0xFF, 0xBB, 0x9F, 0xA8, 0x99, 0x6C, 0xA7, 0x9A, 0x00, 0xB9, 95 0x7D, 0xDA, 0x66, 0xC9, 0xC0, 0x72, 0x72, 0x22, 0x0F, 0x1A, 96 0xCC, 0x23, 0xD9, 0xB7, 0x5F, 0x1B 97 }; 98 DSA *dsa = DSA_new(); 99 BIGNUM *p, *q, *g; 100 101 if (dsa == NULL) 102 return NULL; 103 if (!DSA_set0_pqg(dsa, p = BN_bin2bn(dsap_2048, sizeof(dsap_2048), NULL), 104 q = BN_bin2bn(dsaq_2048, sizeof(dsaq_2048), NULL), 105 g = BN_bin2bn(dsag_2048, sizeof(dsag_2048), NULL))) { 106 DSA_free(dsa); 107 BN_free(p); 108 BN_free(q); 109 BN_free(g); 110 return NULL; 111 } 112 return dsa; 113} 114 115static int genkeys(void) 116{ 117 if (!TEST_ptr(dsakey = load_dsa_params())) 118 return 0; 119 120 if (!TEST_int_eq(DSA_generate_key(dsakey), 1)) 121 return 0; 122 123 return 1; 124} 125 126static int sign_and_verify(int len) 127{ 128 /* 129 * Per FIPS 186-4, the hash is recommended to be the same length as q. 130 * If the hash is longer than q, the leftmost N bits are used; if the hash 131 * is shorter, then we left-pad (see appendix C.2.1). 132 */ 133 size_t sigLength; 134 int digestlen = BN_num_bytes(DSA_get0_q(dsakey)); 135 int ok = 0; 136 137 unsigned char *dataToSign = OPENSSL_malloc(len); 138 unsigned char *paddedData = OPENSSL_malloc(digestlen); 139 unsigned char *signature = NULL; 140 EVP_PKEY_CTX *ctx = NULL; 141 EVP_PKEY *pkey = NULL; 142 143 if (!TEST_ptr(dataToSign) || 144 !TEST_ptr(paddedData) || 145 !TEST_int_eq(RAND_bytes(dataToSign, len), 1)) 146 goto end; 147 148 memset(paddedData, 0, digestlen); 149 if (len > digestlen) 150 memcpy(paddedData, dataToSign, digestlen); 151 else 152 memcpy(paddedData + digestlen - len, dataToSign, len); 153 154 if (!TEST_ptr(pkey = EVP_PKEY_new())) 155 goto end; 156 EVP_PKEY_set1_DSA(pkey, dsakey); 157 158 if (!TEST_ptr(ctx = EVP_PKEY_CTX_new(pkey, NULL))) 159 goto end; 160 if (!TEST_int_eq(EVP_PKEY_sign_init(ctx), 1)) 161 goto end; 162 163 if (EVP_PKEY_sign(ctx, NULL, &sigLength, dataToSign, len) != 1) { 164 TEST_error("Failed to get signature length, len=%d", len); 165 goto end; 166 } 167 168 if (!TEST_ptr(signature = OPENSSL_malloc(sigLength))) 169 goto end; 170 171 if (EVP_PKEY_sign(ctx, signature, &sigLength, dataToSign, len) != 1) { 172 TEST_error("Failed to sign, len=%d", len); 173 goto end; 174 } 175 176 /* Check that the signature is okay via the EVP interface */ 177 if (!TEST_int_eq(EVP_PKEY_verify_init(ctx), 1)) 178 goto end; 179 180 /* ... using the same data we just signed */ 181 if (EVP_PKEY_verify(ctx, signature, sigLength, dataToSign, len) != 1) { 182 TEST_error("EVP verify with unpadded length %d failed\n", len); 183 goto end; 184 } 185 186 /* ... padding/truncating the data to the appropriate digest size */ 187 if (EVP_PKEY_verify(ctx, signature, sigLength, paddedData, digestlen) != 1) { 188 TEST_error("EVP verify with length %d failed\n", len); 189 goto end; 190 } 191 192 /* Verify again using the raw DSA interface */ 193 if (DSA_verify(0, dataToSign, len, signature, sigLength, dsakey) != 1) { 194 TEST_error("Verification with unpadded data failed, len=%d", len); 195 goto end; 196 } 197 198 if (DSA_verify(0, paddedData, digestlen, signature, sigLength, dsakey) != 1) { 199 TEST_error("verify with length %d failed\n", len); 200 goto end; 201 } 202 203 ok = 1; 204end: 205 EVP_PKEY_CTX_free(ctx); 206 EVP_PKEY_free(pkey); 207 208 OPENSSL_free(signature); 209 OPENSSL_free(paddedData); 210 OPENSSL_free(dataToSign); 211 212 return ok; 213} 214 215static int dsa_exact_size_test(void) { 216 /* 217 * For a 2048-bit p, q should be either 224 or 256 bits per the table in 218 * FIPS 186-4 4.2. 219 */ 220 221 return sign_and_verify(224 / 8) && sign_and_verify(256 / 8); 222} 223 224static int dsa_small_digest_test(void) { 225 return sign_and_verify(16) && sign_and_verify(1); 226} 227 228static int dsa_large_digest_test(void) { 229 return sign_and_verify(33) && sign_and_verify(64); 230} 231 232void cleanup_tests(void) 233{ 234 DSA_free(dsakey); 235} 236 237#endif /* OPENSSL_NO_DSA */ 238 239int setup_tests(void) 240{ 241#ifndef OPENSSL_NO_DSA 242 if (!genkeys()) 243 return 0; 244 245 ADD_TEST(dsa_exact_size_test); 246 ADD_TEST(dsa_small_digest_test); 247 ADD_TEST(dsa_large_digest_test); 248#endif 249 return 1; 250} 251 252