Manuel Pégourié-Gonnard | 6801f39 | 2014-01-30 17:22:14 +0100 | [diff] [blame] | 1 | /* BEGIN_HEADER */ |
| 2 | #include <polarssl/hmac_drbg.h> |
| 3 | |
Rich Evans | 00ab470 | 2015-02-06 13:43:58 +0000 | [diff] [blame^] | 4 | #include <string.h> |
| 5 | |
Manuel Pégourié-Gonnard | 6801f39 | 2014-01-30 17:22:14 +0100 | [diff] [blame] | 6 | typedef struct |
| 7 | { |
| 8 | unsigned char *p; |
| 9 | size_t len; |
| 10 | } entropy_ctx; |
| 11 | |
| 12 | int entropy_func( void *data, unsigned char *buf, size_t len ) |
| 13 | { |
| 14 | entropy_ctx *ctx = (entropy_ctx *) data; |
| 15 | |
| 16 | if( len > ctx->len ) |
| 17 | return( -1 ); |
| 18 | |
| 19 | memcpy( buf, ctx->p, len ); |
| 20 | |
| 21 | ctx->p += len; |
| 22 | ctx->len -= len; |
| 23 | |
| 24 | return( 0 ); |
| 25 | } |
| 26 | /* END_HEADER */ |
| 27 | |
| 28 | /* BEGIN_DEPENDENCIES |
| 29 | * depends_on:POLARSSL_HMAC_DRBG_C |
| 30 | * END_DEPENDENCIES |
| 31 | */ |
| 32 | |
Manuel Pégourié-Gonnard | 4f880a5 | 2014-01-30 22:39:42 +0100 | [diff] [blame] | 33 | /* BEGIN_CASE */ |
| 34 | void hmac_drbg_entropy_usage( int md_alg ) |
| 35 | { |
| 36 | unsigned char out[16]; |
| 37 | unsigned char buf[1024]; |
| 38 | const md_info_t *md_info; |
| 39 | hmac_drbg_context ctx; |
| 40 | entropy_ctx entropy; |
| 41 | size_t last_len, i, reps = 10; |
| 42 | |
| 43 | memset( buf, 0, sizeof( buf ) ); |
| 44 | memset( out, 0, sizeof( out ) ); |
| 45 | |
| 46 | entropy.len = sizeof( buf ); |
| 47 | entropy.p = buf; |
| 48 | |
Paul Bakker | 94b916c | 2014-04-17 16:07:20 +0200 | [diff] [blame] | 49 | md_info = md_info_from_type( md_alg ); |
| 50 | TEST_ASSERT( md_info != NULL ); |
Manuel Pégourié-Gonnard | 4f880a5 | 2014-01-30 22:39:42 +0100 | [diff] [blame] | 51 | |
| 52 | /* Init must use entropy */ |
| 53 | last_len = entropy.len; |
| 54 | TEST_ASSERT( hmac_drbg_init( &ctx, md_info, entropy_func, &entropy, |
| 55 | NULL, 0 ) == 0 ); |
| 56 | TEST_ASSERT( entropy.len < last_len ); |
| 57 | |
| 58 | /* By default, PR is off and reseed_interval is large, |
| 59 | * so the next few calls should not use entropy */ |
| 60 | last_len = entropy.len; |
| 61 | for( i = 0; i < reps; i++ ) |
| 62 | { |
| 63 | TEST_ASSERT( hmac_drbg_random( &ctx, out, sizeof( out ) - 4 ) == 0 ); |
| 64 | TEST_ASSERT( hmac_drbg_random_with_add( &ctx, out, sizeof( out ) - 4, |
| 65 | buf, 16 ) == 0 ); |
| 66 | } |
| 67 | TEST_ASSERT( entropy.len == last_len ); |
| 68 | |
| 69 | /* While at it, make sure we didn't write past the requested length */ |
| 70 | TEST_ASSERT( out[sizeof( out ) - 4] == 0 ); |
| 71 | TEST_ASSERT( out[sizeof( out ) - 3] == 0 ); |
| 72 | TEST_ASSERT( out[sizeof( out ) - 2] == 0 ); |
| 73 | TEST_ASSERT( out[sizeof( out ) - 1] == 0 ); |
| 74 | |
| 75 | /* Set reseed_interval to the number of calls done, |
| 76 | * so the next call should reseed */ |
| 77 | hmac_drbg_set_reseed_interval( &ctx, 2 * reps ); |
| 78 | TEST_ASSERT( hmac_drbg_random( &ctx, out, sizeof( out ) ) == 0 ); |
| 79 | TEST_ASSERT( entropy.len < last_len ); |
| 80 | |
| 81 | /* The new few calls should not reseed */ |
| 82 | last_len = entropy.len; |
| 83 | for( i = 0; i < reps / 2; i++ ) |
| 84 | { |
| 85 | TEST_ASSERT( hmac_drbg_random( &ctx, out, sizeof( out ) ) == 0 ); |
| 86 | TEST_ASSERT( hmac_drbg_random_with_add( &ctx, out, sizeof( out ) , |
| 87 | buf, 16 ) == 0 ); |
| 88 | } |
| 89 | TEST_ASSERT( entropy.len == last_len ); |
| 90 | |
| 91 | /* Now enable PR, so the next few calls should all reseed */ |
| 92 | hmac_drbg_set_prediction_resistance( &ctx, POLARSSL_HMAC_DRBG_PR_ON ); |
| 93 | TEST_ASSERT( hmac_drbg_random( &ctx, out, sizeof( out ) ) == 0 ); |
| 94 | TEST_ASSERT( entropy.len < last_len ); |
| 95 | |
| 96 | /* Finally, check setting entropy_len */ |
| 97 | hmac_drbg_set_entropy_len( &ctx, 42 ); |
| 98 | last_len = entropy.len; |
| 99 | TEST_ASSERT( hmac_drbg_random( &ctx, out, sizeof( out ) ) == 0 ); |
| 100 | TEST_ASSERT( (int) last_len - entropy.len == 42 ); |
| 101 | |
| 102 | hmac_drbg_set_entropy_len( &ctx, 13 ); |
| 103 | last_len = entropy.len; |
| 104 | TEST_ASSERT( hmac_drbg_random( &ctx, out, sizeof( out ) ) == 0 ); |
| 105 | TEST_ASSERT( (int) last_len - entropy.len == 13 ); |
Paul Bakker | bd51b26 | 2014-07-10 15:26:12 +0200 | [diff] [blame] | 106 | |
| 107 | exit: |
Manuel Pégourié-Gonnard | 4f880a5 | 2014-01-30 22:39:42 +0100 | [diff] [blame] | 108 | hmac_drbg_free( &ctx ); |
| 109 | } |
| 110 | /* END_CASE */ |
| 111 | |
Manuel Pégourié-Gonnard | 48bc3e8 | 2014-01-30 21:11:16 +0100 | [diff] [blame] | 112 | /* BEGIN_CASE depends_on:POLARSSL_FS_IO */ |
| 113 | void hmac_drbg_seed_file( int md_alg, char *path, int ret ) |
| 114 | { |
| 115 | const md_info_t *md_info; |
| 116 | hmac_drbg_context ctx; |
| 117 | |
Paul Bakker | 94b916c | 2014-04-17 16:07:20 +0200 | [diff] [blame] | 118 | md_info = md_info_from_type( md_alg ); |
| 119 | TEST_ASSERT( md_info != NULL ); |
| 120 | |
Manuel Pégourié-Gonnard | 48bc3e8 | 2014-01-30 21:11:16 +0100 | [diff] [blame] | 121 | TEST_ASSERT( hmac_drbg_init( &ctx, md_info, rnd_std_rand, NULL, |
| 122 | NULL, 0 ) == 0 ); |
| 123 | |
| 124 | TEST_ASSERT( hmac_drbg_write_seed_file( &ctx, path ) == ret ); |
| 125 | TEST_ASSERT( hmac_drbg_update_seed_file( &ctx, path ) == ret ); |
| 126 | |
Paul Bakker | bd51b26 | 2014-07-10 15:26:12 +0200 | [diff] [blame] | 127 | exit: |
Manuel Pégourié-Gonnard | 48bc3e8 | 2014-01-30 21:11:16 +0100 | [diff] [blame] | 128 | hmac_drbg_free( &ctx ); |
| 129 | } |
| 130 | /* END_CASE */ |
| 131 | |
Manuel Pégourié-Gonnard | 6801f39 | 2014-01-30 17:22:14 +0100 | [diff] [blame] | 132 | /* BEGIN_CASE */ |
Manuel Pégourié-Gonnard | 4f880a5 | 2014-01-30 22:39:42 +0100 | [diff] [blame] | 133 | void hmac_drbg_buf( int md_alg ) |
| 134 | { |
| 135 | unsigned char out[16]; |
| 136 | unsigned char buf[100]; |
| 137 | const md_info_t *md_info; |
| 138 | hmac_drbg_context ctx; |
| 139 | size_t i; |
| 140 | |
| 141 | memset( buf, 0, sizeof( buf ) ); |
| 142 | memset( out, 0, sizeof( out ) ); |
| 143 | |
Paul Bakker | 94b916c | 2014-04-17 16:07:20 +0200 | [diff] [blame] | 144 | md_info = md_info_from_type( md_alg ); |
| 145 | TEST_ASSERT( md_info != NULL ); |
Manuel Pégourié-Gonnard | 4f880a5 | 2014-01-30 22:39:42 +0100 | [diff] [blame] | 146 | TEST_ASSERT( hmac_drbg_init_buf( &ctx, md_info, buf, sizeof( buf ) ) == 0 ); |
| 147 | |
| 148 | /* Make sure it never tries to reseed (would segfault otherwise) */ |
| 149 | hmac_drbg_set_reseed_interval( &ctx, 3 ); |
| 150 | hmac_drbg_set_prediction_resistance( &ctx, POLARSSL_HMAC_DRBG_PR_ON ); |
| 151 | |
| 152 | for( i = 0; i < 30; i++ ) |
| 153 | TEST_ASSERT( hmac_drbg_random( &ctx, out, sizeof( out ) ) == 0 ); |
| 154 | |
Paul Bakker | bd51b26 | 2014-07-10 15:26:12 +0200 | [diff] [blame] | 155 | exit: |
Manuel Pégourié-Gonnard | 4f880a5 | 2014-01-30 22:39:42 +0100 | [diff] [blame] | 156 | hmac_drbg_free( &ctx ); |
| 157 | } |
| 158 | /* END_CASE */ |
| 159 | |
| 160 | /* BEGIN_CASE */ |
Manuel Pégourié-Gonnard | 6801f39 | 2014-01-30 17:22:14 +0100 | [diff] [blame] | 161 | void hmac_drbg_no_reseed( int md_alg, |
| 162 | char *entropy_hex, char *custom_hex, |
| 163 | char *add1_hex, char *add2_hex, |
| 164 | char *output_hex ) |
| 165 | { |
Manuel Pégourié-Gonnard | e6cdbbd | 2014-02-01 11:30:03 +0100 | [diff] [blame] | 166 | unsigned char data[1024]; |
Manuel Pégourié-Gonnard | 6801f39 | 2014-01-30 17:22:14 +0100 | [diff] [blame] | 167 | unsigned char entropy[512]; |
| 168 | unsigned char custom[512]; |
| 169 | unsigned char add1[512]; |
| 170 | unsigned char add2[512]; |
| 171 | unsigned char output[512]; |
| 172 | unsigned char my_output[512]; |
| 173 | size_t custom_len, add1_len, add2_len, out_len; |
| 174 | entropy_ctx p_entropy; |
| 175 | const md_info_t *md_info; |
| 176 | hmac_drbg_context ctx; |
| 177 | |
| 178 | memset( my_output, 0, sizeof my_output ); |
| 179 | |
| 180 | custom_len = unhexify( custom, custom_hex ); |
| 181 | add1_len = unhexify( add1, add1_hex ); |
| 182 | add2_len = unhexify( add2, add2_hex ); |
| 183 | out_len = unhexify( output, output_hex ); |
| 184 | p_entropy.len = unhexify( entropy, entropy_hex ); |
| 185 | p_entropy.p = entropy; |
| 186 | |
Paul Bakker | 94b916c | 2014-04-17 16:07:20 +0200 | [diff] [blame] | 187 | md_info = md_info_from_type( md_alg ); |
| 188 | TEST_ASSERT( md_info != NULL ); |
Manuel Pégourié-Gonnard | e6cdbbd | 2014-02-01 11:30:03 +0100 | [diff] [blame] | 189 | |
| 190 | /* Test the simplified buffer-based variant */ |
| 191 | memcpy( data, entropy, p_entropy.len ); |
| 192 | memcpy( data + p_entropy.len, custom, custom_len ); |
| 193 | TEST_ASSERT( hmac_drbg_init_buf( &ctx, md_info, |
| 194 | data, p_entropy.len + custom_len ) == 0 ); |
| 195 | TEST_ASSERT( hmac_drbg_random_with_add( &ctx, my_output, out_len, |
| 196 | add1, add1_len ) == 0 ); |
| 197 | TEST_ASSERT( hmac_drbg_random_with_add( &ctx, my_output, out_len, |
| 198 | add2, add2_len ) == 0 ); |
Paul Bakker | bd51b26 | 2014-07-10 15:26:12 +0200 | [diff] [blame] | 199 | |
| 200 | /* clear for second run */ |
Manuel Pégourié-Gonnard | e6cdbbd | 2014-02-01 11:30:03 +0100 | [diff] [blame] | 201 | hmac_drbg_free( &ctx ); |
| 202 | |
| 203 | TEST_ASSERT( memcmp( my_output, output, out_len ) == 0 ); |
| 204 | |
| 205 | /* And now the normal entropy-based variant */ |
Manuel Pégourié-Gonnard | 6801f39 | 2014-01-30 17:22:14 +0100 | [diff] [blame] | 206 | TEST_ASSERT( hmac_drbg_init( &ctx, md_info, entropy_func, &p_entropy, |
| 207 | custom, custom_len ) == 0 ); |
| 208 | TEST_ASSERT( hmac_drbg_random_with_add( &ctx, my_output, out_len, |
| 209 | add1, add1_len ) == 0 ); |
| 210 | TEST_ASSERT( hmac_drbg_random_with_add( &ctx, my_output, out_len, |
| 211 | add2, add2_len ) == 0 ); |
Manuel Pégourié-Gonnard | 24600b7 | 2014-01-31 09:54:14 +0100 | [diff] [blame] | 212 | TEST_ASSERT( memcmp( my_output, output, out_len ) == 0 ); |
Manuel Pégourié-Gonnard | e6cdbbd | 2014-02-01 11:30:03 +0100 | [diff] [blame] | 213 | |
Paul Bakker | bd51b26 | 2014-07-10 15:26:12 +0200 | [diff] [blame] | 214 | exit: |
| 215 | hmac_drbg_free( &ctx ); |
Manuel Pégourié-Gonnard | 24600b7 | 2014-01-31 09:54:14 +0100 | [diff] [blame] | 216 | } |
| 217 | /* END_CASE */ |
| 218 | |
| 219 | /* BEGIN_CASE */ |
| 220 | void hmac_drbg_nopr( int md_alg, |
| 221 | char *entropy_hex, char *custom_hex, |
| 222 | char *add1_hex, char *add2_hex, char *add3_hex, |
| 223 | char *output_hex ) |
| 224 | { |
| 225 | unsigned char entropy[512]; |
| 226 | unsigned char custom[512]; |
| 227 | unsigned char add1[512]; |
| 228 | unsigned char add2[512]; |
| 229 | unsigned char add3[512]; |
| 230 | unsigned char output[512]; |
| 231 | unsigned char my_output[512]; |
| 232 | size_t custom_len, add1_len, add2_len, add3_len, out_len; |
| 233 | entropy_ctx p_entropy; |
| 234 | const md_info_t *md_info; |
| 235 | hmac_drbg_context ctx; |
| 236 | |
| 237 | memset( my_output, 0, sizeof my_output ); |
| 238 | |
| 239 | custom_len = unhexify( custom, custom_hex ); |
| 240 | add1_len = unhexify( add1, add1_hex ); |
| 241 | add2_len = unhexify( add2, add2_hex ); |
| 242 | add3_len = unhexify( add3, add3_hex ); |
| 243 | out_len = unhexify( output, output_hex ); |
| 244 | p_entropy.len = unhexify( entropy, entropy_hex ); |
| 245 | p_entropy.p = entropy; |
| 246 | |
Paul Bakker | 94b916c | 2014-04-17 16:07:20 +0200 | [diff] [blame] | 247 | md_info = md_info_from_type( md_alg ); |
| 248 | TEST_ASSERT( md_info != NULL ); |
| 249 | |
Manuel Pégourié-Gonnard | 24600b7 | 2014-01-31 09:54:14 +0100 | [diff] [blame] | 250 | TEST_ASSERT( hmac_drbg_init( &ctx, md_info, entropy_func, &p_entropy, |
| 251 | custom, custom_len ) == 0 ); |
| 252 | TEST_ASSERT( hmac_drbg_reseed( &ctx, add1, add1_len ) == 0 ); |
| 253 | TEST_ASSERT( hmac_drbg_random_with_add( &ctx, my_output, out_len, |
| 254 | add2, add2_len ) == 0 ); |
| 255 | TEST_ASSERT( hmac_drbg_random_with_add( &ctx, my_output, out_len, |
| 256 | add3, add3_len ) == 0 ); |
Manuel Pégourié-Gonnard | 24600b7 | 2014-01-31 09:54:14 +0100 | [diff] [blame] | 257 | |
Manuel Pégourié-Gonnard | 6801f39 | 2014-01-30 17:22:14 +0100 | [diff] [blame] | 258 | TEST_ASSERT( memcmp( my_output, output, out_len ) == 0 ); |
| 259 | |
Paul Bakker | bd51b26 | 2014-07-10 15:26:12 +0200 | [diff] [blame] | 260 | exit: |
| 261 | hmac_drbg_free( &ctx ); |
Manuel Pégourié-Gonnard | 6801f39 | 2014-01-30 17:22:14 +0100 | [diff] [blame] | 262 | } |
| 263 | /* END_CASE */ |
| 264 | |
Manuel Pégourié-Gonnard | 62273b8 | 2014-01-31 10:16:57 +0100 | [diff] [blame] | 265 | /* BEGIN_CASE */ |
| 266 | void hmac_drbg_pr( int md_alg, |
| 267 | char *entropy_hex, char *custom_hex, |
| 268 | char *add1_hex, char *add2_hex, |
| 269 | char *output_hex ) |
| 270 | { |
| 271 | unsigned char entropy[512]; |
| 272 | unsigned char custom[512]; |
| 273 | unsigned char add1[512]; |
| 274 | unsigned char add2[512]; |
| 275 | unsigned char output[512]; |
| 276 | unsigned char my_output[512]; |
| 277 | size_t custom_len, add1_len, add2_len, out_len; |
| 278 | entropy_ctx p_entropy; |
| 279 | const md_info_t *md_info; |
| 280 | hmac_drbg_context ctx; |
| 281 | |
| 282 | memset( my_output, 0, sizeof my_output ); |
| 283 | |
| 284 | custom_len = unhexify( custom, custom_hex ); |
| 285 | add1_len = unhexify( add1, add1_hex ); |
| 286 | add2_len = unhexify( add2, add2_hex ); |
| 287 | out_len = unhexify( output, output_hex ); |
| 288 | p_entropy.len = unhexify( entropy, entropy_hex ); |
| 289 | p_entropy.p = entropy; |
| 290 | |
Paul Bakker | 94b916c | 2014-04-17 16:07:20 +0200 | [diff] [blame] | 291 | md_info = md_info_from_type( md_alg ); |
| 292 | TEST_ASSERT( md_info != NULL ); |
| 293 | |
Manuel Pégourié-Gonnard | 62273b8 | 2014-01-31 10:16:57 +0100 | [diff] [blame] | 294 | TEST_ASSERT( hmac_drbg_init( &ctx, md_info, entropy_func, &p_entropy, |
| 295 | custom, custom_len ) == 0 ); |
| 296 | hmac_drbg_set_prediction_resistance( &ctx, POLARSSL_HMAC_DRBG_PR_ON ); |
| 297 | TEST_ASSERT( hmac_drbg_random_with_add( &ctx, my_output, out_len, |
| 298 | add1, add1_len ) == 0 ); |
| 299 | TEST_ASSERT( hmac_drbg_random_with_add( &ctx, my_output, out_len, |
| 300 | add2, add2_len ) == 0 ); |
Manuel Pégourié-Gonnard | 62273b8 | 2014-01-31 10:16:57 +0100 | [diff] [blame] | 301 | |
| 302 | TEST_ASSERT( memcmp( my_output, output, out_len ) == 0 ); |
Paul Bakker | bd51b26 | 2014-07-10 15:26:12 +0200 | [diff] [blame] | 303 | |
| 304 | exit: |
| 305 | hmac_drbg_free( &ctx ); |
Manuel Pégourié-Gonnard | 62273b8 | 2014-01-31 10:16:57 +0100 | [diff] [blame] | 306 | } |
| 307 | /* END_CASE */ |
| 308 | |
Manuel Pégourié-Gonnard | 79afaa0 | 2014-01-31 11:12:09 +0100 | [diff] [blame] | 309 | /* BEGIN_CASE depends_on:POLARSSL_SELF_TEST */ |
| 310 | void hmac_drbg_selftest( ) |
| 311 | { |
| 312 | TEST_ASSERT( hmac_drbg_self_test( 0 ) == 0 ); |
| 313 | } |
| 314 | /* END_CASE */ |