mbed TLS Build
Dependents: Encypting_Funcional
tests/suites/test_suite_entropy.function@0:cdf462088d13, 2017-01-05 (annotated)
- Committer:
- markrad
- Date:
- Thu Jan 05 00:18:44 2017 +0000
- Revision:
- 0:cdf462088d13
Initial commit
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
markrad | 0:cdf462088d13 | 1 | /* BEGIN_HEADER */ |
markrad | 0:cdf462088d13 | 2 | #include "mbedtls/entropy.h" |
markrad | 0:cdf462088d13 | 3 | #include "mbedtls/entropy_poll.h" |
markrad | 0:cdf462088d13 | 4 | |
markrad | 0:cdf462088d13 | 5 | /* |
markrad | 0:cdf462088d13 | 6 | * Number of calls made to entropy_dummy_source() |
markrad | 0:cdf462088d13 | 7 | */ |
markrad | 0:cdf462088d13 | 8 | static size_t entropy_dummy_calls; |
markrad | 0:cdf462088d13 | 9 | |
markrad | 0:cdf462088d13 | 10 | /* |
markrad | 0:cdf462088d13 | 11 | * Dummy entropy source |
markrad | 0:cdf462088d13 | 12 | * |
markrad | 0:cdf462088d13 | 13 | * If data is NULL, write exactly the requested length. |
markrad | 0:cdf462088d13 | 14 | * Otherwise, write the length indicated by data or error if negative |
markrad | 0:cdf462088d13 | 15 | */ |
markrad | 0:cdf462088d13 | 16 | static int entropy_dummy_source( void *data, unsigned char *output, |
markrad | 0:cdf462088d13 | 17 | size_t len, size_t *olen ) |
markrad | 0:cdf462088d13 | 18 | { |
markrad | 0:cdf462088d13 | 19 | entropy_dummy_calls++; |
markrad | 0:cdf462088d13 | 20 | |
markrad | 0:cdf462088d13 | 21 | if( data == NULL ) |
markrad | 0:cdf462088d13 | 22 | *olen = len; |
markrad | 0:cdf462088d13 | 23 | else |
markrad | 0:cdf462088d13 | 24 | { |
markrad | 0:cdf462088d13 | 25 | int *d = (int *) data; |
markrad | 0:cdf462088d13 | 26 | |
markrad | 0:cdf462088d13 | 27 | if( *d < 0 ) |
markrad | 0:cdf462088d13 | 28 | return( MBEDTLS_ERR_ENTROPY_SOURCE_FAILED ); |
markrad | 0:cdf462088d13 | 29 | else |
markrad | 0:cdf462088d13 | 30 | *olen = *d; |
markrad | 0:cdf462088d13 | 31 | } |
markrad | 0:cdf462088d13 | 32 | |
markrad | 0:cdf462088d13 | 33 | memset( output, 0x2a, *olen ); |
markrad | 0:cdf462088d13 | 34 | |
markrad | 0:cdf462088d13 | 35 | return( 0 ); |
markrad | 0:cdf462088d13 | 36 | } |
markrad | 0:cdf462088d13 | 37 | |
markrad | 0:cdf462088d13 | 38 | #if defined(MBEDTLS_ENTROPY_NV_SEED) |
markrad | 0:cdf462088d13 | 39 | /* |
markrad | 0:cdf462088d13 | 40 | * Ability to clear entropy sources to allow testing with just predefined |
markrad | 0:cdf462088d13 | 41 | * entropy sources. This function or tests depending on it might break if there |
markrad | 0:cdf462088d13 | 42 | * are internal changes to how entropy sources are registered. |
markrad | 0:cdf462088d13 | 43 | * |
markrad | 0:cdf462088d13 | 44 | * To be called immediately after mbedtls_entropy_init(). |
markrad | 0:cdf462088d13 | 45 | * |
markrad | 0:cdf462088d13 | 46 | * Just resetting the counter. New sources will overwrite existing ones. |
markrad | 0:cdf462088d13 | 47 | * This might break memory checks in the future if sources need 'free-ing' then |
markrad | 0:cdf462088d13 | 48 | * as well. |
markrad | 0:cdf462088d13 | 49 | */ |
markrad | 0:cdf462088d13 | 50 | static void entropy_clear_sources( mbedtls_entropy_context *ctx ) |
markrad | 0:cdf462088d13 | 51 | { |
markrad | 0:cdf462088d13 | 52 | ctx->source_count = 0; |
markrad | 0:cdf462088d13 | 53 | } |
markrad | 0:cdf462088d13 | 54 | |
markrad | 0:cdf462088d13 | 55 | /* |
markrad | 0:cdf462088d13 | 56 | * NV seed read/write functions that use a buffer instead of a file |
markrad | 0:cdf462088d13 | 57 | */ |
markrad | 0:cdf462088d13 | 58 | static unsigned char buffer_seed[MBEDTLS_ENTROPY_BLOCK_SIZE]; |
markrad | 0:cdf462088d13 | 59 | |
markrad | 0:cdf462088d13 | 60 | static int buffer_nv_seed_read( unsigned char *buf, size_t buf_len ) |
markrad | 0:cdf462088d13 | 61 | { |
markrad | 0:cdf462088d13 | 62 | if( buf_len != MBEDTLS_ENTROPY_BLOCK_SIZE ) |
markrad | 0:cdf462088d13 | 63 | return( -1 ); |
markrad | 0:cdf462088d13 | 64 | |
markrad | 0:cdf462088d13 | 65 | memcpy( buf, buffer_seed, MBEDTLS_ENTROPY_BLOCK_SIZE ); |
markrad | 0:cdf462088d13 | 66 | return( 0 ); |
markrad | 0:cdf462088d13 | 67 | } |
markrad | 0:cdf462088d13 | 68 | |
markrad | 0:cdf462088d13 | 69 | static int buffer_nv_seed_write( unsigned char *buf, size_t buf_len ) |
markrad | 0:cdf462088d13 | 70 | { |
markrad | 0:cdf462088d13 | 71 | if( buf_len != MBEDTLS_ENTROPY_BLOCK_SIZE ) |
markrad | 0:cdf462088d13 | 72 | return( -1 ); |
markrad | 0:cdf462088d13 | 73 | |
markrad | 0:cdf462088d13 | 74 | memcpy( buffer_seed, buf, MBEDTLS_ENTROPY_BLOCK_SIZE ); |
markrad | 0:cdf462088d13 | 75 | return( 0 ); |
markrad | 0:cdf462088d13 | 76 | } |
markrad | 0:cdf462088d13 | 77 | |
markrad | 0:cdf462088d13 | 78 | /* |
markrad | 0:cdf462088d13 | 79 | * NV seed read/write helpers that fill the base seedfile |
markrad | 0:cdf462088d13 | 80 | */ |
markrad | 0:cdf462088d13 | 81 | static int write_nv_seed( unsigned char *buf, size_t buf_len ) |
markrad | 0:cdf462088d13 | 82 | { |
markrad | 0:cdf462088d13 | 83 | FILE *f; |
markrad | 0:cdf462088d13 | 84 | |
markrad | 0:cdf462088d13 | 85 | if( buf_len != MBEDTLS_ENTROPY_BLOCK_SIZE ) |
markrad | 0:cdf462088d13 | 86 | return( -1 ); |
markrad | 0:cdf462088d13 | 87 | |
markrad | 0:cdf462088d13 | 88 | if( ( f = fopen( MBEDTLS_PLATFORM_STD_NV_SEED_FILE, "w" ) ) == NULL ) |
markrad | 0:cdf462088d13 | 89 | return( -1 ); |
markrad | 0:cdf462088d13 | 90 | |
markrad | 0:cdf462088d13 | 91 | if( fwrite( buf, 1, MBEDTLS_ENTROPY_BLOCK_SIZE, f ) != |
markrad | 0:cdf462088d13 | 92 | MBEDTLS_ENTROPY_BLOCK_SIZE ) |
markrad | 0:cdf462088d13 | 93 | return( -1 ); |
markrad | 0:cdf462088d13 | 94 | |
markrad | 0:cdf462088d13 | 95 | fclose( f ); |
markrad | 0:cdf462088d13 | 96 | |
markrad | 0:cdf462088d13 | 97 | return( 0 ); |
markrad | 0:cdf462088d13 | 98 | } |
markrad | 0:cdf462088d13 | 99 | |
markrad | 0:cdf462088d13 | 100 | static int read_nv_seed( unsigned char *buf, size_t buf_len ) |
markrad | 0:cdf462088d13 | 101 | { |
markrad | 0:cdf462088d13 | 102 | FILE *f; |
markrad | 0:cdf462088d13 | 103 | |
markrad | 0:cdf462088d13 | 104 | if( buf_len != MBEDTLS_ENTROPY_BLOCK_SIZE ) |
markrad | 0:cdf462088d13 | 105 | return( -1 ); |
markrad | 0:cdf462088d13 | 106 | |
markrad | 0:cdf462088d13 | 107 | if( ( f = fopen( MBEDTLS_PLATFORM_STD_NV_SEED_FILE, "rb" ) ) == NULL ) |
markrad | 0:cdf462088d13 | 108 | return( -1 ); |
markrad | 0:cdf462088d13 | 109 | |
markrad | 0:cdf462088d13 | 110 | if( fread( buf, 1, MBEDTLS_ENTROPY_BLOCK_SIZE, f ) != |
markrad | 0:cdf462088d13 | 111 | MBEDTLS_ENTROPY_BLOCK_SIZE ) |
markrad | 0:cdf462088d13 | 112 | return( -1 ); |
markrad | 0:cdf462088d13 | 113 | |
markrad | 0:cdf462088d13 | 114 | fclose( f ); |
markrad | 0:cdf462088d13 | 115 | |
markrad | 0:cdf462088d13 | 116 | return( 0 ); |
markrad | 0:cdf462088d13 | 117 | } |
markrad | 0:cdf462088d13 | 118 | #endif /* MBEDTLS_ENTROPY_NV_SEED */ |
markrad | 0:cdf462088d13 | 119 | /* END_HEADER */ |
markrad | 0:cdf462088d13 | 120 | |
markrad | 0:cdf462088d13 | 121 | /* BEGIN_DEPENDENCIES |
markrad | 0:cdf462088d13 | 122 | * depends_on:MBEDTLS_ENTROPY_C |
markrad | 0:cdf462088d13 | 123 | * END_DEPENDENCIES |
markrad | 0:cdf462088d13 | 124 | */ |
markrad | 0:cdf462088d13 | 125 | |
markrad | 0:cdf462088d13 | 126 | /* BEGIN_CASE depends_on:MBEDTLS_ENTROPY_NV_SEED:MBEDTLS_FS_IO */ |
markrad | 0:cdf462088d13 | 127 | void entropy_seed_file( char *path, int ret ) |
markrad | 0:cdf462088d13 | 128 | { |
markrad | 0:cdf462088d13 | 129 | mbedtls_entropy_context ctx; |
markrad | 0:cdf462088d13 | 130 | |
markrad | 0:cdf462088d13 | 131 | mbedtls_entropy_init( &ctx ); |
markrad | 0:cdf462088d13 | 132 | |
markrad | 0:cdf462088d13 | 133 | TEST_ASSERT( mbedtls_entropy_write_seed_file( &ctx, path ) == ret ); |
markrad | 0:cdf462088d13 | 134 | TEST_ASSERT( mbedtls_entropy_update_seed_file( &ctx, path ) == ret ); |
markrad | 0:cdf462088d13 | 135 | |
markrad | 0:cdf462088d13 | 136 | exit: |
markrad | 0:cdf462088d13 | 137 | mbedtls_entropy_free( &ctx ); |
markrad | 0:cdf462088d13 | 138 | } |
markrad | 0:cdf462088d13 | 139 | /* END_CASE */ |
markrad | 0:cdf462088d13 | 140 | |
markrad | 0:cdf462088d13 | 141 | /* BEGIN_CASE */ |
markrad | 0:cdf462088d13 | 142 | void entropy_too_many_sources( ) |
markrad | 0:cdf462088d13 | 143 | { |
markrad | 0:cdf462088d13 | 144 | mbedtls_entropy_context ctx; |
markrad | 0:cdf462088d13 | 145 | size_t i; |
markrad | 0:cdf462088d13 | 146 | |
markrad | 0:cdf462088d13 | 147 | mbedtls_entropy_init( &ctx ); |
markrad | 0:cdf462088d13 | 148 | |
markrad | 0:cdf462088d13 | 149 | /* |
markrad | 0:cdf462088d13 | 150 | * It's hard to tell precisely when the error will occur, |
markrad | 0:cdf462088d13 | 151 | * since we don't know how many sources were automatically added. |
markrad | 0:cdf462088d13 | 152 | */ |
markrad | 0:cdf462088d13 | 153 | for( i = 0; i < MBEDTLS_ENTROPY_MAX_SOURCES; i++ ) |
markrad | 0:cdf462088d13 | 154 | (void) mbedtls_entropy_add_source( &ctx, entropy_dummy_source, NULL, |
markrad | 0:cdf462088d13 | 155 | 16, MBEDTLS_ENTROPY_SOURCE_WEAK ); |
markrad | 0:cdf462088d13 | 156 | |
markrad | 0:cdf462088d13 | 157 | TEST_ASSERT( mbedtls_entropy_add_source( &ctx, entropy_dummy_source, NULL, |
markrad | 0:cdf462088d13 | 158 | 16, MBEDTLS_ENTROPY_SOURCE_WEAK ) |
markrad | 0:cdf462088d13 | 159 | == MBEDTLS_ERR_ENTROPY_MAX_SOURCES ); |
markrad | 0:cdf462088d13 | 160 | |
markrad | 0:cdf462088d13 | 161 | exit: |
markrad | 0:cdf462088d13 | 162 | mbedtls_entropy_free( &ctx ); |
markrad | 0:cdf462088d13 | 163 | } |
markrad | 0:cdf462088d13 | 164 | /* END_CASE */ |
markrad | 0:cdf462088d13 | 165 | |
markrad | 0:cdf462088d13 | 166 | /* BEGIN_CASE */ |
markrad | 0:cdf462088d13 | 167 | void entropy_func_len( int len, int ret ) |
markrad | 0:cdf462088d13 | 168 | { |
markrad | 0:cdf462088d13 | 169 | mbedtls_entropy_context ctx; |
markrad | 0:cdf462088d13 | 170 | unsigned char buf[MBEDTLS_ENTROPY_BLOCK_SIZE + 10] = { 0 }; |
markrad | 0:cdf462088d13 | 171 | unsigned char acc[MBEDTLS_ENTROPY_BLOCK_SIZE + 10] = { 0 }; |
markrad | 0:cdf462088d13 | 172 | size_t i, j; |
markrad | 0:cdf462088d13 | 173 | |
markrad | 0:cdf462088d13 | 174 | mbedtls_entropy_init( &ctx ); |
markrad | 0:cdf462088d13 | 175 | |
markrad | 0:cdf462088d13 | 176 | /* |
markrad | 0:cdf462088d13 | 177 | * See comments in mbedtls_entropy_self_test() |
markrad | 0:cdf462088d13 | 178 | */ |
markrad | 0:cdf462088d13 | 179 | for( i = 0; i < 8; i++ ) |
markrad | 0:cdf462088d13 | 180 | { |
markrad | 0:cdf462088d13 | 181 | TEST_ASSERT( mbedtls_entropy_func( &ctx, buf, len ) == ret ); |
markrad | 0:cdf462088d13 | 182 | for( j = 0; j < sizeof( buf ); j++ ) |
markrad | 0:cdf462088d13 | 183 | acc[j] |= buf[j]; |
markrad | 0:cdf462088d13 | 184 | } |
markrad | 0:cdf462088d13 | 185 | |
markrad | 0:cdf462088d13 | 186 | if( ret == 0 ) |
markrad | 0:cdf462088d13 | 187 | for( j = 0; j < (size_t) len; j++ ) |
markrad | 0:cdf462088d13 | 188 | TEST_ASSERT( acc[j] != 0 ); |
markrad | 0:cdf462088d13 | 189 | |
markrad | 0:cdf462088d13 | 190 | for( j = len; j < sizeof( buf ); j++ ) |
markrad | 0:cdf462088d13 | 191 | TEST_ASSERT( acc[j] == 0 ); |
markrad | 0:cdf462088d13 | 192 | } |
markrad | 0:cdf462088d13 | 193 | /* END_CASE */ |
markrad | 0:cdf462088d13 | 194 | |
markrad | 0:cdf462088d13 | 195 | /* BEGIN_CASE */ |
markrad | 0:cdf462088d13 | 196 | void entropy_source_fail( char *path ) |
markrad | 0:cdf462088d13 | 197 | { |
markrad | 0:cdf462088d13 | 198 | mbedtls_entropy_context ctx; |
markrad | 0:cdf462088d13 | 199 | int fail = -1; |
markrad | 0:cdf462088d13 | 200 | unsigned char buf[16]; |
markrad | 0:cdf462088d13 | 201 | |
markrad | 0:cdf462088d13 | 202 | mbedtls_entropy_init( &ctx ); |
markrad | 0:cdf462088d13 | 203 | |
markrad | 0:cdf462088d13 | 204 | TEST_ASSERT( mbedtls_entropy_add_source( &ctx, entropy_dummy_source, |
markrad | 0:cdf462088d13 | 205 | &fail, 16, |
markrad | 0:cdf462088d13 | 206 | MBEDTLS_ENTROPY_SOURCE_WEAK ) |
markrad | 0:cdf462088d13 | 207 | == 0 ); |
markrad | 0:cdf462088d13 | 208 | |
markrad | 0:cdf462088d13 | 209 | TEST_ASSERT( mbedtls_entropy_func( &ctx, buf, sizeof( buf ) ) |
markrad | 0:cdf462088d13 | 210 | == MBEDTLS_ERR_ENTROPY_SOURCE_FAILED ); |
markrad | 0:cdf462088d13 | 211 | TEST_ASSERT( mbedtls_entropy_gather( &ctx ) |
markrad | 0:cdf462088d13 | 212 | == MBEDTLS_ERR_ENTROPY_SOURCE_FAILED ); |
markrad | 0:cdf462088d13 | 213 | #if defined(MBEDTLS_FS_IO) && defined(MBEDTLS_ENTROPY_NV_SEED) |
markrad | 0:cdf462088d13 | 214 | TEST_ASSERT( mbedtls_entropy_write_seed_file( &ctx, path ) |
markrad | 0:cdf462088d13 | 215 | == MBEDTLS_ERR_ENTROPY_SOURCE_FAILED ); |
markrad | 0:cdf462088d13 | 216 | TEST_ASSERT( mbedtls_entropy_update_seed_file( &ctx, path ) |
markrad | 0:cdf462088d13 | 217 | == MBEDTLS_ERR_ENTROPY_SOURCE_FAILED ); |
markrad | 0:cdf462088d13 | 218 | #else |
markrad | 0:cdf462088d13 | 219 | ((void) path); |
markrad | 0:cdf462088d13 | 220 | #endif |
markrad | 0:cdf462088d13 | 221 | |
markrad | 0:cdf462088d13 | 222 | exit: |
markrad | 0:cdf462088d13 | 223 | mbedtls_entropy_free( &ctx ); |
markrad | 0:cdf462088d13 | 224 | } |
markrad | 0:cdf462088d13 | 225 | /* END_CASE */ |
markrad | 0:cdf462088d13 | 226 | |
markrad | 0:cdf462088d13 | 227 | /* BEGIN_CASE */ |
markrad | 0:cdf462088d13 | 228 | void entropy_threshold( int threshold, int chunk_size, int result ) |
markrad | 0:cdf462088d13 | 229 | { |
markrad | 0:cdf462088d13 | 230 | mbedtls_entropy_context ctx; |
markrad | 0:cdf462088d13 | 231 | unsigned char buf[MBEDTLS_ENTROPY_BLOCK_SIZE] = { 0 }; |
markrad | 0:cdf462088d13 | 232 | int ret; |
markrad | 0:cdf462088d13 | 233 | |
markrad | 0:cdf462088d13 | 234 | mbedtls_entropy_init( &ctx ); |
markrad | 0:cdf462088d13 | 235 | |
markrad | 0:cdf462088d13 | 236 | TEST_ASSERT( mbedtls_entropy_add_source( &ctx, entropy_dummy_source, |
markrad | 0:cdf462088d13 | 237 | &chunk_size, threshold, |
markrad | 0:cdf462088d13 | 238 | MBEDTLS_ENTROPY_SOURCE_WEAK ) == 0 ); |
markrad | 0:cdf462088d13 | 239 | |
markrad | 0:cdf462088d13 | 240 | entropy_dummy_calls = 0; |
markrad | 0:cdf462088d13 | 241 | ret = mbedtls_entropy_func( &ctx, buf, sizeof( buf ) ); |
markrad | 0:cdf462088d13 | 242 | |
markrad | 0:cdf462088d13 | 243 | if( result >= 0 ) |
markrad | 0:cdf462088d13 | 244 | { |
markrad | 0:cdf462088d13 | 245 | TEST_ASSERT( ret == 0 ); |
markrad | 0:cdf462088d13 | 246 | #if defined(MBEDTLS_ENTROPY_NV_SEED) |
markrad | 0:cdf462088d13 | 247 | // Two times as much calls due to the NV seed update |
markrad | 0:cdf462088d13 | 248 | result *= 2; |
markrad | 0:cdf462088d13 | 249 | #endif |
markrad | 0:cdf462088d13 | 250 | TEST_ASSERT( entropy_dummy_calls == (size_t) result ); |
markrad | 0:cdf462088d13 | 251 | } |
markrad | 0:cdf462088d13 | 252 | else |
markrad | 0:cdf462088d13 | 253 | { |
markrad | 0:cdf462088d13 | 254 | TEST_ASSERT( ret == result ); |
markrad | 0:cdf462088d13 | 255 | } |
markrad | 0:cdf462088d13 | 256 | |
markrad | 0:cdf462088d13 | 257 | exit: |
markrad | 0:cdf462088d13 | 258 | mbedtls_entropy_free( &ctx ); |
markrad | 0:cdf462088d13 | 259 | } |
markrad | 0:cdf462088d13 | 260 | /* END_CASE */ |
markrad | 0:cdf462088d13 | 261 | |
markrad | 0:cdf462088d13 | 262 | /* BEGIN_CASE depends_on:MBEDTLS_ENTROPY_NV_SEED:MBEDTLS_FS_IO */ |
markrad | 0:cdf462088d13 | 263 | void nv_seed_file_create() |
markrad | 0:cdf462088d13 | 264 | { |
markrad | 0:cdf462088d13 | 265 | unsigned char buf[MBEDTLS_ENTROPY_BLOCK_SIZE]; |
markrad | 0:cdf462088d13 | 266 | |
markrad | 0:cdf462088d13 | 267 | memset( buf, 0, MBEDTLS_ENTROPY_BLOCK_SIZE ); |
markrad | 0:cdf462088d13 | 268 | |
markrad | 0:cdf462088d13 | 269 | TEST_ASSERT( write_nv_seed( buf, MBEDTLS_ENTROPY_BLOCK_SIZE ) == 0 ); |
markrad | 0:cdf462088d13 | 270 | } |
markrad | 0:cdf462088d13 | 271 | /* END_CASE */ |
markrad | 0:cdf462088d13 | 272 | |
markrad | 0:cdf462088d13 | 273 | /* BEGIN_CASE depends_on:MBEDTLS_ENTROPY_NV_SEED:MBEDTLS_FS_IO:MBEDTLS_PLATFORM_NV_SEED_ALT */ |
markrad | 0:cdf462088d13 | 274 | void entropy_nv_seed_std_io() |
markrad | 0:cdf462088d13 | 275 | { |
markrad | 0:cdf462088d13 | 276 | unsigned char io_seed[MBEDTLS_ENTROPY_BLOCK_SIZE]; |
markrad | 0:cdf462088d13 | 277 | unsigned char check_seed[MBEDTLS_ENTROPY_BLOCK_SIZE]; |
markrad | 0:cdf462088d13 | 278 | |
markrad | 0:cdf462088d13 | 279 | memset( io_seed, 1, MBEDTLS_ENTROPY_BLOCK_SIZE ); |
markrad | 0:cdf462088d13 | 280 | memset( check_seed, 0, MBEDTLS_ENTROPY_BLOCK_SIZE ); |
markrad | 0:cdf462088d13 | 281 | |
markrad | 0:cdf462088d13 | 282 | mbedtls_platform_set_nv_seed( mbedtls_platform_std_nv_seed_read, |
markrad | 0:cdf462088d13 | 283 | mbedtls_platform_std_nv_seed_write ); |
markrad | 0:cdf462088d13 | 284 | |
markrad | 0:cdf462088d13 | 285 | /* Check if platform NV read and write manipulate the same data */ |
markrad | 0:cdf462088d13 | 286 | TEST_ASSERT( write_nv_seed( io_seed, MBEDTLS_ENTROPY_BLOCK_SIZE ) == 0 ); |
markrad | 0:cdf462088d13 | 287 | TEST_ASSERT( mbedtls_nv_seed_read( check_seed, MBEDTLS_ENTROPY_BLOCK_SIZE ) == |
markrad | 0:cdf462088d13 | 288 | MBEDTLS_ENTROPY_BLOCK_SIZE ); |
markrad | 0:cdf462088d13 | 289 | |
markrad | 0:cdf462088d13 | 290 | TEST_ASSERT( memcmp( io_seed, check_seed, MBEDTLS_ENTROPY_BLOCK_SIZE ) == 0 ); |
markrad | 0:cdf462088d13 | 291 | |
markrad | 0:cdf462088d13 | 292 | memset( check_seed, 0, MBEDTLS_ENTROPY_BLOCK_SIZE ); |
markrad | 0:cdf462088d13 | 293 | |
markrad | 0:cdf462088d13 | 294 | /* Check if platform NV write and raw read manipulate the same data */ |
markrad | 0:cdf462088d13 | 295 | TEST_ASSERT( mbedtls_nv_seed_write( io_seed, MBEDTLS_ENTROPY_BLOCK_SIZE ) == |
markrad | 0:cdf462088d13 | 296 | MBEDTLS_ENTROPY_BLOCK_SIZE ); |
markrad | 0:cdf462088d13 | 297 | TEST_ASSERT( read_nv_seed( check_seed, MBEDTLS_ENTROPY_BLOCK_SIZE ) == 0 ); |
markrad | 0:cdf462088d13 | 298 | |
markrad | 0:cdf462088d13 | 299 | TEST_ASSERT( memcmp( io_seed, check_seed, MBEDTLS_ENTROPY_BLOCK_SIZE ) == 0 ); |
markrad | 0:cdf462088d13 | 300 | } |
markrad | 0:cdf462088d13 | 301 | /* END_CASE */ |
markrad | 0:cdf462088d13 | 302 | |
markrad | 0:cdf462088d13 | 303 | /* BEGIN_CASE depends_on:MBEDTLS_ENTROPY_NV_SEED:MBEDTLS_PLATFORM_NV_SEED_ALT:MBEDTLS_ENTROPY_SHA512_ACCUMULATOR */ |
markrad | 0:cdf462088d13 | 304 | void entropy_nv_seed( char *read_seed_str ) |
markrad | 0:cdf462088d13 | 305 | { |
markrad | 0:cdf462088d13 | 306 | mbedtls_sha512_context accumulator; |
markrad | 0:cdf462088d13 | 307 | mbedtls_entropy_context ctx; |
markrad | 0:cdf462088d13 | 308 | |
markrad | 0:cdf462088d13 | 309 | unsigned char header[2]; |
markrad | 0:cdf462088d13 | 310 | unsigned char entropy[MBEDTLS_ENTROPY_BLOCK_SIZE]; |
markrad | 0:cdf462088d13 | 311 | unsigned char buf[MBEDTLS_ENTROPY_BLOCK_SIZE]; |
markrad | 0:cdf462088d13 | 312 | unsigned char empty[MBEDTLS_ENTROPY_BLOCK_SIZE]; |
markrad | 0:cdf462088d13 | 313 | unsigned char read_seed[MBEDTLS_ENTROPY_BLOCK_SIZE]; |
markrad | 0:cdf462088d13 | 314 | unsigned char check_seed[MBEDTLS_ENTROPY_BLOCK_SIZE]; |
markrad | 0:cdf462088d13 | 315 | unsigned char check_entropy[MBEDTLS_ENTROPY_BLOCK_SIZE]; |
markrad | 0:cdf462088d13 | 316 | |
markrad | 0:cdf462088d13 | 317 | memset( entropy, 0, MBEDTLS_ENTROPY_BLOCK_SIZE ); |
markrad | 0:cdf462088d13 | 318 | memset( buf, 0, MBEDTLS_ENTROPY_BLOCK_SIZE ); |
markrad | 0:cdf462088d13 | 319 | memset( buffer_seed, 0, MBEDTLS_ENTROPY_BLOCK_SIZE ); |
markrad | 0:cdf462088d13 | 320 | memset( empty, 0, MBEDTLS_ENTROPY_BLOCK_SIZE ); |
markrad | 0:cdf462088d13 | 321 | memset( check_seed, 2, MBEDTLS_ENTROPY_BLOCK_SIZE ); |
markrad | 0:cdf462088d13 | 322 | memset( check_entropy, 3, MBEDTLS_ENTROPY_BLOCK_SIZE ); |
markrad | 0:cdf462088d13 | 323 | |
markrad | 0:cdf462088d13 | 324 | // Set the initial NV seed to read |
markrad | 0:cdf462088d13 | 325 | unhexify( read_seed, read_seed_str ); |
markrad | 0:cdf462088d13 | 326 | memcpy( buffer_seed, read_seed, MBEDTLS_ENTROPY_BLOCK_SIZE ); |
markrad | 0:cdf462088d13 | 327 | |
markrad | 0:cdf462088d13 | 328 | // Make sure we read/write NV seed from our buffers |
markrad | 0:cdf462088d13 | 329 | mbedtls_platform_set_nv_seed( buffer_nv_seed_read, buffer_nv_seed_write ); |
markrad | 0:cdf462088d13 | 330 | |
markrad | 0:cdf462088d13 | 331 | mbedtls_entropy_init( &ctx ); |
markrad | 0:cdf462088d13 | 332 | entropy_clear_sources( &ctx ); |
markrad | 0:cdf462088d13 | 333 | |
markrad | 0:cdf462088d13 | 334 | TEST_ASSERT( mbedtls_entropy_add_source( &ctx, mbedtls_nv_seed_poll, NULL, |
markrad | 0:cdf462088d13 | 335 | MBEDTLS_ENTROPY_BLOCK_SIZE, |
markrad | 0:cdf462088d13 | 336 | MBEDTLS_ENTROPY_SOURCE_STRONG ) == 0 ); |
markrad | 0:cdf462088d13 | 337 | |
markrad | 0:cdf462088d13 | 338 | // Do an entropy run |
markrad | 0:cdf462088d13 | 339 | TEST_ASSERT( mbedtls_entropy_func( &ctx, entropy, sizeof( entropy ) ) == 0 ); |
markrad | 0:cdf462088d13 | 340 | |
markrad | 0:cdf462088d13 | 341 | // Determine what should have happened with manual entropy internal logic |
markrad | 0:cdf462088d13 | 342 | // Only use the SHA-512 version to check |
markrad | 0:cdf462088d13 | 343 | |
markrad | 0:cdf462088d13 | 344 | // Init accumulator |
markrad | 0:cdf462088d13 | 345 | header[1] = MBEDTLS_ENTROPY_BLOCK_SIZE; |
markrad | 0:cdf462088d13 | 346 | mbedtls_sha512_starts( &accumulator, 0 ); |
markrad | 0:cdf462088d13 | 347 | |
markrad | 0:cdf462088d13 | 348 | // First run for updating write_seed |
markrad | 0:cdf462088d13 | 349 | header[0] = 0; |
markrad | 0:cdf462088d13 | 350 | mbedtls_sha512_update( &accumulator, header, 2 ); |
markrad | 0:cdf462088d13 | 351 | mbedtls_sha512_update( &accumulator, read_seed, MBEDTLS_ENTROPY_BLOCK_SIZE ); |
markrad | 0:cdf462088d13 | 352 | mbedtls_sha512_finish( &accumulator, buf ); |
markrad | 0:cdf462088d13 | 353 | |
markrad | 0:cdf462088d13 | 354 | memset( &accumulator, 0, sizeof( mbedtls_sha512_context ) ); |
markrad | 0:cdf462088d13 | 355 | mbedtls_sha512_starts( &accumulator, 0 ); |
markrad | 0:cdf462088d13 | 356 | mbedtls_sha512_update( &accumulator, buf, MBEDTLS_ENTROPY_BLOCK_SIZE ); |
markrad | 0:cdf462088d13 | 357 | |
markrad | 0:cdf462088d13 | 358 | mbedtls_sha512( buf, MBEDTLS_ENTROPY_BLOCK_SIZE, check_seed, 0 ); |
markrad | 0:cdf462088d13 | 359 | |
markrad | 0:cdf462088d13 | 360 | // Second run for actual entropy (triggers mbedtls_entropy_update_nv_seed) |
markrad | 0:cdf462088d13 | 361 | header[0] = MBEDTLS_ENTROPY_SOURCE_MANUAL; |
markrad | 0:cdf462088d13 | 362 | mbedtls_sha512_update( &accumulator, header, 2 ); |
markrad | 0:cdf462088d13 | 363 | mbedtls_sha512_update( &accumulator, empty, MBEDTLS_ENTROPY_BLOCK_SIZE ); |
markrad | 0:cdf462088d13 | 364 | |
markrad | 0:cdf462088d13 | 365 | header[0] = 0; |
markrad | 0:cdf462088d13 | 366 | mbedtls_sha512_update( &accumulator, header, 2 ); |
markrad | 0:cdf462088d13 | 367 | mbedtls_sha512_update( &accumulator, check_seed, MBEDTLS_ENTROPY_BLOCK_SIZE ); |
markrad | 0:cdf462088d13 | 368 | mbedtls_sha512_finish( &accumulator, buf ); |
markrad | 0:cdf462088d13 | 369 | |
markrad | 0:cdf462088d13 | 370 | mbedtls_sha512( buf, MBEDTLS_ENTROPY_BLOCK_SIZE, check_entropy, 0 ); |
markrad | 0:cdf462088d13 | 371 | |
markrad | 0:cdf462088d13 | 372 | // Check result of both NV file and entropy received with the manual calculations |
markrad | 0:cdf462088d13 | 373 | TEST_ASSERT( memcmp( check_seed, buffer_seed, MBEDTLS_ENTROPY_BLOCK_SIZE ) == 0 ); |
markrad | 0:cdf462088d13 | 374 | TEST_ASSERT( memcmp( check_entropy, entropy, MBEDTLS_ENTROPY_BLOCK_SIZE ) == 0 ); |
markrad | 0:cdf462088d13 | 375 | |
markrad | 0:cdf462088d13 | 376 | mbedtls_entropy_free( &ctx ); |
markrad | 0:cdf462088d13 | 377 | } |
markrad | 0:cdf462088d13 | 378 | /* END_CASE */ |
markrad | 0:cdf462088d13 | 379 | |
markrad | 0:cdf462088d13 | 380 | /* BEGIN_CASE depends_on:MBEDTLS_SELF_TEST */ |
markrad | 0:cdf462088d13 | 381 | void entropy_selftest( int result ) |
markrad | 0:cdf462088d13 | 382 | { |
markrad | 0:cdf462088d13 | 383 | TEST_ASSERT( mbedtls_entropy_self_test( 1 ) == result ); |
markrad | 0:cdf462088d13 | 384 | } |
markrad | 0:cdf462088d13 | 385 | /* END_CASE */ |