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Fix bug in md_hmac_demo

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Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
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Manuel Pégourié-Gonnard 2022-02-01 09:47:46 +01:00
parent 29088a4146
commit 12ec5719e7
1 changed files with 4 additions and 3 deletions
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7
programs/hash/md_hmac_demo.c
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@ -108,21 +108,22 @@ int hmac_demo(void)
/* prepare context and load key */ /* prepare context and load key */
// the last argument to setup is 1 to enable HMAC (not just hashing) // the last argument to setup is 1 to enable HMAC (not just hashing)
CHK( mbedtls_md_setup( &ctx, mbedtls_md_info_from_type( alg ), 1 ) ); const mbedtls_md_info_t *info = mbedtls_md_info_from_type( alg );
CHK( mbedtls_md_setup( &ctx, info, 1 ) );
CHK( mbedtls_md_hmac_starts( &ctx, key_bytes, sizeof( key_bytes ) ) ); CHK( mbedtls_md_hmac_starts( &ctx, key_bytes, sizeof( key_bytes ) ) );
/* compute HMAC(key, msg1_part1 | msg1_part2) */ /* compute HMAC(key, msg1_part1 | msg1_part2) */
CHK( mbedtls_md_hmac_update( &ctx, msg1_part1, sizeof( msg1_part1 ) ) ); CHK( mbedtls_md_hmac_update( &ctx, msg1_part1, sizeof( msg1_part1 ) ) );
CHK( mbedtls_md_hmac_update( &ctx, msg1_part2, sizeof( msg1_part2 ) ) ); CHK( mbedtls_md_hmac_update( &ctx, msg1_part2, sizeof( msg1_part2 ) ) );
CHK( mbedtls_md_hmac_finish( &ctx, out ) ); CHK( mbedtls_md_hmac_finish( &ctx, out ) );
print_buf( "msg1", out, sizeof( out ) ); print_buf( "msg1", out, mbedtls_md_get_size( info ) );
/* compute HMAC(key, msg2_part1 | msg2_part2) */ /* compute HMAC(key, msg2_part1 | msg2_part2) */
CHK( mbedtls_md_hmac_reset( &ctx ) ); // prepare for new operation CHK( mbedtls_md_hmac_reset( &ctx ) ); // prepare for new operation
CHK( mbedtls_md_hmac_update( &ctx, msg2_part1, sizeof( msg2_part1 ) ) ); CHK( mbedtls_md_hmac_update( &ctx, msg2_part1, sizeof( msg2_part1 ) ) );
CHK( mbedtls_md_hmac_update( &ctx, msg2_part2, sizeof( msg2_part2 ) ) ); CHK( mbedtls_md_hmac_update( &ctx, msg2_part2, sizeof( msg2_part2 ) ) );
CHK( mbedtls_md_hmac_finish( &ctx, out ) ); CHK( mbedtls_md_hmac_finish( &ctx, out ) );
print_buf( "msg2", out, sizeof( out ) ); print_buf( "msg2", out, mbedtls_md_get_size( info ) );
exit: exit:
mbedtls_md_free( &ctx ); mbedtls_md_free( &ctx );