diff options
Diffstat (limited to 'lib/mbedtls-2.27.0/programs/ssl/ssl_context_info.c')
| -rw-r--r-- | lib/mbedtls-2.27.0/programs/ssl/ssl_context_info.c | 1112 |
1 files changed, 0 insertions, 1112 deletions
diff --git a/lib/mbedtls-2.27.0/programs/ssl/ssl_context_info.c b/lib/mbedtls-2.27.0/programs/ssl/ssl_context_info.c deleted file mode 100644 index a204d9e..0000000 --- a/lib/mbedtls-2.27.0/programs/ssl/ssl_context_info.c +++ /dev/null @@ -1,1112 +0,0 @@ -/* - * MbedTLS SSL context deserializer from base64 code - * - * Copyright The Mbed TLS Contributors - * SPDX-License-Identifier: Apache-2.0 - * - * Licensed under the Apache License, Version 2.0 (the "License"); you may - * not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT - * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -#if !defined(MBEDTLS_CONFIG_FILE) -#include "mbedtls/config.h" -#else -#include MBEDTLS_CONFIG_FILE -#endif - -#include <stdio.h> -#include <stdlib.h> - -#if !defined(MBEDTLS_X509_CRT_PARSE_C) || !defined(MBEDTLS_ERROR_C) || \ - !defined(MBEDTLS_SSL_TLS_C) -int main( void ) -{ - printf("MBEDTLS_X509_CRT_PARSE_C and/or MBEDTLS_ERROR_C and/or " - "MBEDTLS_SSL_TLS_C not defined.\n"); - return( 0 ); -} -#else - -#if defined(_MSC_VER) && !defined(_CRT_SECURE_NO_DEPRECATE) -#define _CRT_SECURE_NO_DEPRECATE 1 -#endif - -#include <stdint.h> -#include <stdarg.h> -#include <string.h> -#include <time.h> -#include "mbedtls/ssl.h" -#include "mbedtls/error.h" -#include "mbedtls/base64.h" -#include "mbedtls/md.h" -#include "mbedtls/md_internal.h" -#include "mbedtls/x509_crt.h" -#include "mbedtls/ssl_ciphersuites.h" - -/* - * This program version - */ -#define PROG_NAME "ssl_context_info" -#define VER_MAJOR 0 -#define VER_MINOR 1 - -/* - * Flags copied from the Mbed TLS library. - */ -#define SESSION_CONFIG_TIME_BIT ( 1 << 0 ) -#define SESSION_CONFIG_CRT_BIT ( 1 << 1 ) -#define SESSION_CONFIG_CLIENT_TICKET_BIT ( 1 << 2 ) -#define SESSION_CONFIG_MFL_BIT ( 1 << 3 ) -#define SESSION_CONFIG_TRUNC_HMAC_BIT ( 1 << 4 ) -#define SESSION_CONFIG_ETM_BIT ( 1 << 5 ) -#define SESSION_CONFIG_TICKET_BIT ( 1 << 6 ) - -#define CONTEXT_CONFIG_DTLS_CONNECTION_ID_BIT ( 1 << 0 ) -#define CONTEXT_CONFIG_DTLS_BADMAC_LIMIT_BIT ( 1 << 1 ) -#define CONTEXT_CONFIG_DTLS_ANTI_REPLAY_BIT ( 1 << 2 ) -#define CONTEXT_CONFIG_ALPN_BIT ( 1 << 3 ) - -#define TRANSFORM_RANDBYTE_LEN 64 - -/* - * Minimum and maximum number of bytes for specific data: context, sessions, - * certificates, tickets and buffers in the program. The context and session - * size values have been calculated based on the 'print_deserialized_ssl_context()' - * and 'print_deserialized_ssl_session()' content. - */ -#define MIN_CONTEXT_LEN 84 -#define MIN_SESSION_LEN 88 - -#define MAX_CONTEXT_LEN 875 /* without session data */ -#define MAX_SESSION_LEN 109 /* without certificate and ticket data */ -#define MAX_CERTIFICATE_LEN ( ( 1 << 24 ) - 1 ) -#define MAX_TICKET_LEN ( ( 1 << 24 ) - 1 ) - -#define MIN_SERIALIZED_DATA ( MIN_CONTEXT_LEN + MIN_SESSION_LEN ) -#define MAX_SERIALIZED_DATA ( MAX_CONTEXT_LEN + MAX_SESSION_LEN + \ - MAX_CERTIFICATE_LEN + MAX_TICKET_LEN ) - -#define MIN_BASE64_LEN ( MIN_SERIALIZED_DATA * 4 / 3 ) -#define MAX_BASE64_LEN ( MAX_SERIALIZED_DATA * 4 / 3 + 3 ) - -/* - * A macro that prevents from reading out of the ssl buffer range. - */ -#define CHECK_SSL_END( LEN ) \ -do \ -{ \ - if( end - ssl < (int)( LEN ) ) \ - { \ - printf_err( "%s", buf_ln_err ); \ - return; \ - } \ -} while( 0 ) - -/* - * Global values - */ -FILE *b64_file = NULL; /* file with base64 codes to deserialize */ -char conf_keep_peer_certificate = 1; /* MBEDTLS_SSL_KEEP_PEER_CERTIFICATE from mbedTLS configuration */ -char conf_dtls_proto = 1; /* MBEDTLS_SSL_PROTO_DTLS from mbedTLS configuration */ -char debug = 0; /* flag for debug messages */ -const char alloc_err[] = "Cannot allocate memory\n"; -const char buf_ln_err[] = "Buffer does not have enough data to complete the parsing\n"; - -/* - * Basic printing functions - */ -void print_version( ) -{ - printf( "%s v%d.%d\n", PROG_NAME, VER_MAJOR, VER_MINOR ); -} - -void print_usage( ) -{ - print_version(); - printf( "\nThis program is used to deserialize an Mbed TLS SSL session from the base64 code provided\n" - "in the text file. The program can deserialize many codes from one file, but they must be\n" - "separated, e.g. by a newline.\n\n" ); - printf( - "Usage:\n" - "\t-f path - Path to the file with base64 code\n" - "\t-v - Show version\n" - "\t-h - Show this usage\n" - "\t-d - Print more information\n" - "\t--keep-peer-cert=0 - Use this option if you know that the Mbed TLS library\n" - "\t has been compiled with the MBEDTLS_SSL_KEEP_PEER_CERTIFICATE\n" - "\t flag. You can also use it if there are some problems with reading\n" - "\t the information about certificate\n" - "\t--dtls-protocol=0 - Use this option if you know that the Mbed TLS library\n" - "\t has been compiled without the MBEDTLS_SSL_PROTO_DTLS flag\n" - "\n" - ); -} - -void printf_dbg( const char *str, ... ) -{ - if( debug ) - { - va_list args; - va_start( args, str ); - printf( "debug: " ); - vprintf( str, args ); - fflush( stdout ); - va_end( args ); - } -} - -void printf_err( const char *str, ... ) -{ - va_list args; - va_start( args, str ); - fflush( stdout ); - fprintf( stderr, "ERROR: " ); - vfprintf( stderr, str, args ); - fflush( stderr ); - va_end( args ); -} - -/* - * Exit from the program in case of error - */ -void error_exit() -{ - if( NULL != b64_file ) - { - fclose( b64_file ); - } - exit( -1 ); -} - -/* - * This function takes the input arguments of this program - */ -void parse_arguments( int argc, char *argv[] ) -{ - int i = 1; - - if( argc < 2 ) - { - print_usage(); - error_exit(); - } - - while( i < argc ) - { - if( strcmp( argv[i], "-d" ) == 0 ) - { - debug = 1; - } - else if( strcmp( argv[i], "-h" ) == 0 ) - { - print_usage(); - } - else if( strcmp( argv[i], "-v" ) == 0 ) - { - print_version(); - } - else if( strcmp( argv[i], "-f" ) == 0 ) - { - if( ++i >= argc ) - { - printf_err( "File path is empty\n" ); - error_exit(); - } - - if( ( b64_file = fopen( argv[i], "r" ) ) == NULL ) - { - printf_err( "Cannot find file \"%s\"\n", argv[i] ); - error_exit(); - } - } - else if( strcmp( argv[i], "--keep-peer-cert=0" ) == 0 ) - { - conf_keep_peer_certificate = 0; - } - else if( strcmp( argv[i], "--dtls-protocol=0" ) == 0 ) - { - conf_dtls_proto = 0; - } - else - { - print_usage(); - error_exit(); - } - - i++; - } -} - -/* - * This function prints base64 code to the stdout - */ -void print_b64( const uint8_t *b, size_t len ) -{ - size_t i = 0; - const uint8_t *end = b + len; - printf("\t"); - while( b < end ) - { - if( ++i > 75 ) - { - printf( "\n\t" ); - i = 0; - } - printf( "%c", *b++ ); - } - printf( "\n" ); - fflush( stdout ); -} - -/* - * This function prints hex code from the buffer to the stdout. - * - * /p b buffer with data to print - * /p len number of bytes to print - * /p in_line number of bytes in one line - * /p prefix prefix for the new lines - */ -void print_hex( const uint8_t *b, size_t len, - const size_t in_line, const char *prefix ) -{ - size_t i = 0; - const uint8_t *end = b + len; - - if( prefix == NULL ) - { - prefix = ""; - } - - while( b < end ) - { - if( ++i > in_line ) - { - printf( "\n%s", prefix ); - i = 1; - } - printf( "%02X ", (uint8_t) *b++ ); - } - printf("\n"); - fflush(stdout); -} - -/* - * Print the value of time_t in format e.g. 2020-01-23 13:05:59 - */ -void print_time( const time_t *time ) -{ - char buf[20]; - struct tm *t = gmtime( time ); - static const char format[] = "%Y-%m-%d %H:%M:%S"; - if( NULL != t ) - { - strftime( buf, sizeof( buf ), format, t ); - printf( "%s\n", buf ); - } - else - { - printf( "unknown\n" ); - } -} - -/* - * Print the input string if the bit is set in the value - */ -void print_if_bit( const char *str, int bit, int val ) -{ - if( bit & val ) - { - printf( "\t%s\n", str ); - } -} - -/* - * Return pointer to hardcoded "enabled" or "disabled" depending on the input value - */ -const char * get_enabled_str( int is_en ) -{ - return ( is_en ) ? "enabled" : "disabled"; -} - -/* - * Return pointer to hardcoded MFL string value depending on the MFL code at the input - */ -const char * get_mfl_str( int mfl_code ) -{ - switch( mfl_code ) - { - case MBEDTLS_SSL_MAX_FRAG_LEN_NONE: - return "none"; - case MBEDTLS_SSL_MAX_FRAG_LEN_512: - return "512"; - case MBEDTLS_SSL_MAX_FRAG_LEN_1024: - return "1024"; - case MBEDTLS_SSL_MAX_FRAG_LEN_2048: - return "2048"; - case MBEDTLS_SSL_MAX_FRAG_LEN_4096: - return "4096"; - default: - return "error"; - } -} - -/* - * Read next base64 code from the 'b64_file'. The 'b64_file' must be opened - * previously. After each call to this function, the internal file position - * indicator of the global b64_file is advanced. - * - * Note - This function checks the size of the input buffer and if necessary, - * increases it to the maximum MAX_BASE64_LEN - * - * /p b64 pointer to the pointer of the buffer for input data - * /p max_len pointer to the current buffer capacity. It can be changed if - * the buffer needs to be increased - * - * \retval number of bytes written in to the b64 buffer or 0 in case no more - * data was found - */ -size_t read_next_b64_code( uint8_t **b64, size_t *max_len ) -{ - int valid_balance = 0; /* balance between valid and invalid characters */ - size_t len = 0; - char pad = 0; - int c = 0; - - while( EOF != c ) - { - char c_valid = 0; - - c = fgetc( b64_file ); - - if( pad > 0 ) - { - if( c == '=' && pad == 1 ) - { - c_valid = 1; - pad = 2; - } - } - else if( ( c >= 'A' && c <= 'Z' ) || - ( c >= 'a' && c <= 'z' ) || - ( c >= '0' && c <= '9' ) || - c == '+' || c == '/' ) - { - c_valid = 1; - } - else if( c == '=' ) - { - c_valid = 1; - pad = 1; - } - else if( c == '-' ) - { - c = '+'; - c_valid = 1; - } - else if( c == '_' ) - { - c = '/'; - c_valid = 1; - } - - if( c_valid ) - { - /* A string of characters that could be a base64 code. */ - valid_balance++; - - if( len < *max_len ) - { - ( *b64 )[ len++ ] = c; - } - else if( *max_len < MAX_BASE64_LEN ) - { - /* Current buffer is too small, but can be resized. */ - void *ptr; - size_t new_size = ( MAX_BASE64_LEN - 4096 > *max_len ) ? - *max_len + 4096 : MAX_BASE64_LEN; - - ptr = realloc( *b64, new_size ); - if( NULL == ptr ) - { - printf_err( alloc_err ); - return 0; - } - *b64 = ptr; - *max_len = new_size; - ( *b64 )[ len++ ] = c; - } - else - { - /* Too much data so it will be treated as invalid */ - len++; - } - } - else if( len > 0 ) - { - /* End of a string that could be a base64 code, but need to check - * that the length of the characters is correct. */ - - valid_balance--; - - if( len < MIN_CONTEXT_LEN ) - { - printf_dbg( "The code found is too small to be a SSL context.\n" ); - len = pad = 0; - } - else if( len > *max_len ) - { - printf_err( "The code found is too large by %u bytes.\n", len - *max_len ); - len = pad = 0; - } - else if( len % 4 != 0 ) - { - printf_err( "The length of the base64 code found should be a multiple of 4.\n" ); - len = pad = 0; - } - else - { - /* Base64 code with valid character length. */ - return len; - } - } - else - { - valid_balance--; - } - - /* Detection of potentially wrong file format like: binary, zip, ISO, etc. */ - if( valid_balance < -100 ) - { - printf_err( "Too many bad symbols detected. File check aborted.\n" ); - return 0; - } - } - - printf_dbg( "End of file\n" ); - return 0; -} - -/* - * This function deserializes and prints to the stdout all obtained information - * about the certificates from provided data. - * - * /p ssl pointer to serialized certificate - * /p len number of bytes in the buffer -*/ -void print_deserialized_ssl_cert( const uint8_t *ssl, uint32_t len ) -{ - enum { STRLEN = 4096 }; - mbedtls_x509_crt crt; - int ret; - char str[STRLEN]; - - printf( "\nCertificate:\n" ); - - mbedtls_x509_crt_init( &crt ); - ret = mbedtls_x509_crt_parse_der( &crt, ssl, len ); - if( 0 != ret ) - { - mbedtls_strerror( ret, str, STRLEN ); - printf_err( "Invalid format of X.509 - %s\n", str ); - printf( "Cannot deserialize:\n\t" ); - print_hex( ssl, len, 25, "\t" ); - } - else - { - mbedtls_x509_crt *current = &crt; - - while( current != NULL ) - { - ret = mbedtls_x509_crt_info( str, STRLEN, "\t", current ); - if( 0 > ret ) - { - mbedtls_strerror( ret, str, STRLEN ); - printf_err( "Cannot write to the output - %s\n", str ); - } - else - { - printf( "%s", str ); - } - - current = current->next; - - if( current ) - { - printf( "\n" ); - } - - } - } - - mbedtls_x509_crt_free( &crt ); -} - -/* - * This function deserializes and prints to the stdout all obtained information - * about the session from provided data. This function was built based on - * mbedtls_ssl_session_load(). mbedtls_ssl_session_load() could not be used - * due to dependencies on the mbedTLS configuration. - * - * The data structure in the buffer: - * uint64 start_time; - * uint8 ciphersuite[2]; // defined by the standard - * uint8 compression; // 0 or 1 - * uint8 session_id_len; // at most 32 - * opaque session_id[32]; - * opaque master[48]; // fixed length in the standard - * uint32 verify_result; - * opaque peer_cert<0..2^24-1>; // length 0 means no peer cert - * opaque ticket<0..2^24-1>; // length 0 means no ticket - * uint32 ticket_lifetime; - * uint8 mfl_code; // up to 255 according to standard - * uint8 trunc_hmac; // 0 or 1 - * uint8 encrypt_then_mac; // 0 or 1 - * - * /p ssl pointer to serialized session - * /p len number of bytes in the buffer - * /p session_cfg_flag session configuration flags - */ -void print_deserialized_ssl_session( const uint8_t *ssl, uint32_t len, - int session_cfg_flag ) -{ - const struct mbedtls_ssl_ciphersuite_t * ciphersuite_info; - int ciphersuite_id; - uint32_t cert_len, ticket_len; - uint32_t verify_result, ticket_lifetime; - const uint8_t *end = ssl + len; - - printf( "\nSession info:\n" ); - - if( session_cfg_flag & SESSION_CONFIG_TIME_BIT ) - { - uint64_t start; - CHECK_SSL_END( 8 ); - start = ( (uint64_t) ssl[0] << 56 ) | - ( (uint64_t) ssl[1] << 48 ) | - ( (uint64_t) ssl[2] << 40 ) | - ( (uint64_t) ssl[3] << 32 ) | - ( (uint64_t) ssl[4] << 24 ) | - ( (uint64_t) ssl[5] << 16 ) | - ( (uint64_t) ssl[6] << 8 ) | - ( (uint64_t) ssl[7] ); - ssl += 8; - printf( "\tstart time : " ); - print_time( (time_t*) &start ); - } - - CHECK_SSL_END( 2 ); - ciphersuite_id = ( (int) ssl[0] << 8 ) | (int) ssl[1]; - printf_dbg( "Ciphersuite ID: %d\n", ciphersuite_id ); - ssl += 2; - - ciphersuite_info = mbedtls_ssl_ciphersuite_from_id( ciphersuite_id ); - if( ciphersuite_info == NULL ) - { - printf_err( "Cannot find ciphersuite info\n" ); - } - else - { - const mbedtls_cipher_info_t *cipher_info; - const mbedtls_md_info_t *md_info; - - printf( "\tciphersuite : %s\n", ciphersuite_info->name ); - printf( "\tcipher flags : 0x%02X\n", ciphersuite_info->flags ); - - cipher_info = mbedtls_cipher_info_from_type( ciphersuite_info->cipher ); - if( cipher_info == NULL ) - { - printf_err( "Cannot find cipher info\n" ); - } - else - { - printf( "\tcipher : %s\n", cipher_info->name ); - } - - md_info = mbedtls_md_info_from_type( ciphersuite_info->mac ); - if( md_info == NULL ) - { - printf_err( "Cannot find Message-Digest info\n" ); - } - else - { - printf( "\tMessage-Digest : %s\n", md_info->name ); - } - } - - CHECK_SSL_END( 1 ); - printf( "\tcompression : %s\n", get_enabled_str( *ssl++ ) ); - - /* Note - Here we can get session ID length from serialized data, but we - * use hardcoded 32-bytes length. This approach was taken from - * 'mbedtls_ssl_session_load()'. */ - CHECK_SSL_END( 1 + 32 ); - printf_dbg( "Session id length: %u\n", (uint32_t) *ssl++ ); - printf( "\tsession ID : "); - print_hex( ssl, 32, 16, "\t " ); - ssl += 32; - - printf( "\tmaster secret : "); - CHECK_SSL_END( 48 ); - print_hex( ssl, 48, 16, "\t " ); - ssl += 48; - - CHECK_SSL_END( 4 ); - verify_result = ( (uint32_t) ssl[0] << 24 ) | - ( (uint32_t) ssl[1] << 16 ) | - ( (uint32_t) ssl[2] << 8 ) | - ( (uint32_t) ssl[3] ); - ssl += 4; - printf( "\tverify result : 0x%08X\n", verify_result ); - - if( SESSION_CONFIG_CRT_BIT & session_cfg_flag ) - { - if( conf_keep_peer_certificate ) - { - CHECK_SSL_END( 3 ); - cert_len = ( (uint32_t) ssl[0] << 16 ) | - ( (uint32_t) ssl[1] << 8 ) | - ( (uint32_t) ssl[2] ); - ssl += 3; - printf_dbg( "Certificate length: %u\n", cert_len ); - - if( cert_len > 0 ) - { - CHECK_SSL_END( cert_len ); - print_deserialized_ssl_cert( ssl, cert_len ); - ssl += cert_len; - } - } - else - { - printf( "\tPeer digest : " ); - - CHECK_SSL_END( 1 ); - switch( (mbedtls_md_type_t) *ssl++ ) - { - case MBEDTLS_MD_NONE: - printf( "none\n" ); - break; - case MBEDTLS_MD_MD2: - printf( "MD2\n" ); - break; - case MBEDTLS_MD_MD4: - printf( "MD4\n" ); - break; - case MBEDTLS_MD_MD5: - printf( "MD5\n" ); - break; - case MBEDTLS_MD_SHA1: - printf( "SHA1\n" ); - break; - case MBEDTLS_MD_SHA224: - printf( "SHA224\n" ); - break; - case MBEDTLS_MD_SHA256: - printf( "SHA256\n" ); - break; - case MBEDTLS_MD_SHA384: - printf( "SHA384\n" ); - break; - case MBEDTLS_MD_SHA512: - printf( "SHA512\n" ); - break; - case MBEDTLS_MD_RIPEMD160: - printf( "RIPEMD160\n" ); - break; - default: - printf( "undefined or erroneous\n" ); - break; - } - - CHECK_SSL_END( 1 ); - cert_len = (uint32_t) *ssl++; - printf_dbg( "Message-Digest length: %u\n", cert_len ); - - if( cert_len > 0 ) - { - printf( "\tPeer digest cert : " ); - CHECK_SSL_END( cert_len ); - print_hex( ssl, cert_len, 16, "\t " ); - ssl += cert_len; - } - } - } - - if( SESSION_CONFIG_CLIENT_TICKET_BIT & session_cfg_flag ) - { - printf( "\nTicket:\n" ); - - CHECK_SSL_END( 3 ); - ticket_len = ( (uint32_t) ssl[0] << 16 ) | - ( (uint32_t) ssl[1] << 8 ) | - ( (uint32_t) ssl[2] ); - ssl += 3; - printf_dbg( "Ticket length: %u\n", ticket_len ); - - if( ticket_len > 0 ) - { - printf( "\t" ); - CHECK_SSL_END( ticket_len ); - print_hex( ssl, ticket_len, 22, "\t" ); - ssl += ticket_len; - printf( "\n" ); - } - - CHECK_SSL_END( 4 ); - ticket_lifetime = ( (uint32_t) ssl[0] << 24 ) | - ( (uint32_t) ssl[1] << 16 ) | - ( (uint32_t) ssl[2] << 8 ) | - ( (uint32_t) ssl[3] ); - ssl += 4; - printf( "\tlifetime : %u sec.\n", ticket_lifetime ); - } - - if( ssl < end ) - { - printf( "\nSession others:\n" ); - } - - if( SESSION_CONFIG_MFL_BIT & session_cfg_flag ) - { - CHECK_SSL_END( 1 ); - printf( "\tMFL : %s\n", get_mfl_str( *ssl++ ) ); - } - - if( SESSION_CONFIG_TRUNC_HMAC_BIT & session_cfg_flag ) - { - CHECK_SSL_END( 1 ); - printf( "\tnegotiate truncated HMAC : %s\n", get_enabled_str( *ssl++ ) ); - } - - if( SESSION_CONFIG_ETM_BIT & session_cfg_flag ) - { - CHECK_SSL_END( 1 ); - printf( "\tEncrypt-then-MAC : %s\n", get_enabled_str( *ssl++ ) ); - } - - if( 0 != ( end - ssl ) ) - { - printf_err( "%i bytes left to analyze from session\n", (int32_t)( end - ssl ) ); - } -} - -/* - * This function deserializes and prints to the stdout all obtained information - * about the context from provided data. This function was built based on - * mbedtls_ssl_context_load(). mbedtls_ssl_context_load() could not be used - * due to dependencies on the mbedTLS configuration and the configuration of - * the context when serialization was created. - * - * The data structure in the buffer: - * // header - * uint8 version[3]; - * uint8 configuration[5]; - * // session sub-structure - * uint32_t session_len; - * opaque session<1..2^32-1>; // see mbedtls_ssl_session_save() - * // transform sub-structure - * uint8 random[64]; // ServerHello.random+ClientHello.random - * uint8 in_cid_len; - * uint8 in_cid<0..2^8-1> // Connection ID: expected incoming value - * uint8 out_cid_len; - * uint8 out_cid<0..2^8-1> // Connection ID: outgoing value to use - * // fields from ssl_context - * uint32 badmac_seen; // DTLS: number of records with failing MAC - * uint64 in_window_top; // DTLS: last validated record seq_num - * uint64 in_window; // DTLS: bitmask for replay protection - * uint8 disable_datagram_packing; // DTLS: only one record per datagram - * uint64 cur_out_ctr; // Record layer: outgoing sequence number - * uint16 mtu; // DTLS: path mtu (max outgoing fragment size) - * uint8 alpn_chosen_len; - * uint8 alpn_chosen<0..2^8-1> // ALPN: negotiated application protocol - * - * /p ssl pointer to serialized session - * /p len number of bytes in the buffer - */ -void print_deserialized_ssl_context( const uint8_t *ssl, size_t len ) -{ - const uint8_t *end = ssl + len; - uint32_t session_len; - int session_cfg_flag; - int context_cfg_flag; - - printf( "\nMbed TLS version:\n" ); - - CHECK_SSL_END( 3 + 2 + 3 ); - - printf( "\tmajor %u\n", (uint32_t) *ssl++ ); - printf( "\tminor %u\n", (uint32_t) *ssl++ ); - printf( "\tpath %u\n", (uint32_t) *ssl++ ); - - printf( "\nEnabled session and context configuration:\n" ); - - session_cfg_flag = ( (int) ssl[0] << 8 ) | ( (int) ssl[1] ); - ssl += 2; - - context_cfg_flag = ( (int) ssl[0] << 16 ) | - ( (int) ssl[1] << 8 ) | - ( (int) ssl[2] ) ; - ssl += 3; - - printf_dbg( "Session config flags 0x%04X\n", session_cfg_flag ); - printf_dbg( "Context config flags 0x%06X\n", context_cfg_flag ); - - print_if_bit( "MBEDTLS_HAVE_TIME", SESSION_CONFIG_TIME_BIT, session_cfg_flag ); - print_if_bit( "MBEDTLS_X509_CRT_PARSE_C", SESSION_CONFIG_CRT_BIT, session_cfg_flag ); - print_if_bit( "MBEDTLS_SSL_MAX_FRAGMENT_LENGTH", SESSION_CONFIG_MFL_BIT, session_cfg_flag ); - print_if_bit( "MBEDTLS_SSL_TRUNCATED_HMAC", SESSION_CONFIG_TRUNC_HMAC_BIT, session_cfg_flag ); - print_if_bit( "MBEDTLS_SSL_ENCRYPT_THEN_MAC", SESSION_CONFIG_ETM_BIT, session_cfg_flag ); - print_if_bit( "MBEDTLS_SSL_SESSION_TICKETS", SESSION_CONFIG_TICKET_BIT, session_cfg_flag ); - print_if_bit( "MBEDTLS_SSL_SESSION_TICKETS and client", SESSION_CONFIG_CLIENT_TICKET_BIT, session_cfg_flag ); - - print_if_bit( "MBEDTLS_SSL_DTLS_CONNECTION_ID", CONTEXT_CONFIG_DTLS_CONNECTION_ID_BIT, context_cfg_flag ); - print_if_bit( "MBEDTLS_SSL_DTLS_BADMAC_LIMIT", CONTEXT_CONFIG_DTLS_BADMAC_LIMIT_BIT, context_cfg_flag ); - print_if_bit( "MBEDTLS_SSL_DTLS_ANTI_REPLAY", CONTEXT_CONFIG_DTLS_ANTI_REPLAY_BIT, context_cfg_flag ); - print_if_bit( "MBEDTLS_SSL_ALPN", CONTEXT_CONFIG_ALPN_BIT, context_cfg_flag ); - - CHECK_SSL_END( 4 ); - session_len = ( (uint32_t) ssl[0] << 24 ) | - ( (uint32_t) ssl[1] << 16 ) | - ( (uint32_t) ssl[2] << 8 ) | - ( (uint32_t) ssl[3] ); - ssl += 4; - printf_dbg( "Session length %u\n", session_len ); - - CHECK_SSL_END( session_len ); - print_deserialized_ssl_session( ssl, session_len, session_cfg_flag ); - ssl += session_len; - - printf( "\nRandom bytes:\n\t"); - - CHECK_SSL_END( TRANSFORM_RANDBYTE_LEN ); - print_hex( ssl, TRANSFORM_RANDBYTE_LEN, 22, "\t" ); - ssl += TRANSFORM_RANDBYTE_LEN; - - printf( "\nContext others:\n" ); - - if( CONTEXT_CONFIG_DTLS_CONNECTION_ID_BIT & context_cfg_flag ) - { - uint8_t cid_len; - - CHECK_SSL_END( 1 ); - cid_len = *ssl++; - printf_dbg( "In CID length %u\n", (uint32_t) cid_len ); - - printf( "\tin CID : " ); - if( cid_len > 0 ) - { - CHECK_SSL_END( cid_len ); - print_hex( ssl, cid_len, 20, "\t" ); - ssl += cid_len; - } - else - { - printf( "none\n" ); - } - - CHECK_SSL_END( 1 ); - cid_len = *ssl++; - printf_dbg( "Out CID length %u\n", (uint32_t) cid_len ); - - printf( "\tout CID : " ); - if( cid_len > 0 ) - { - CHECK_SSL_END( cid_len ); - print_hex( ssl, cid_len, 20, "\t" ); - ssl += cid_len; - } - else - { - printf( "none\n" ); - } - } - - if( CONTEXT_CONFIG_DTLS_BADMAC_LIMIT_BIT & context_cfg_flag ) - { - uint32_t badmac_seen; - - CHECK_SSL_END( 4 ); - badmac_seen = ( (uint32_t) ssl[0] << 24 ) | - ( (uint32_t) ssl[1] << 16 ) | - ( (uint32_t) ssl[2] << 8 ) | - ( (uint32_t) ssl[3] ); - ssl += 4; - printf( "\tbad MAC seen number : %u\n", badmac_seen ); - - /* value 'in_window_top' from mbedtls_ssl_context */ - printf( "\tlast validated record sequence no. : " ); - CHECK_SSL_END( 8 ); - print_hex( ssl, 8, 20, "" ); - ssl += 8; - - /* value 'in_window' from mbedtls_ssl_context */ - printf( "\tbitmask for replay detection : " ); - CHECK_SSL_END( 8 ); - print_hex( ssl, 8, 20, "" ); - ssl += 8; - } - - if( conf_dtls_proto ) - { - CHECK_SSL_END( 1 ); - printf( "\tDTLS datagram packing : %s\n", - get_enabled_str( ! ( *ssl++ ) ) ); - } - - /* value 'cur_out_ctr' from mbedtls_ssl_context */ - printf( "\toutgoing record sequence no. : "); - CHECK_SSL_END( 8 ); - print_hex( ssl, 8, 20, "" ); - ssl += 8; - - if( conf_dtls_proto ) - { - uint16_t mtu; - CHECK_SSL_END( 2 ); - mtu = ( ssl[0] << 8 ) | ssl[1]; - ssl += 2; - printf( "\tMTU : %u\n", mtu ); - } - - - if( CONTEXT_CONFIG_ALPN_BIT & context_cfg_flag ) - { - uint8_t alpn_len; - - CHECK_SSL_END( 1 ); - alpn_len = *ssl++; - printf_dbg( "ALPN length %u\n", (uint32_t) alpn_len ); - - printf( "\tALPN negotiation : " ); - CHECK_SSL_END( alpn_len ); - if( alpn_len > 0 ) - { - if( strlen( (const char*) ssl ) == alpn_len ) - { - printf( "%s\n", ssl ); - } - else - { - printf( "\n" ); - printf_err( "\tALPN negotiation is incorrect\n" ); - } - ssl += alpn_len; - } - else - { - printf( "not selected\n" ); - } - } - - if( 0 != ( end - ssl ) ) - { - printf_err( "%i bytes left to analyze from context\n", (int32_t)( end - ssl ) ); - } - printf( "\n" ); -} - -int main( int argc, char *argv[] ) -{ - enum { SSL_INIT_LEN = 4096 }; - - uint32_t b64_counter = 0; - uint8_t *b64_buf = NULL; - uint8_t *ssl_buf = NULL; - size_t b64_max_len = SSL_INIT_LEN; - size_t ssl_max_len = SSL_INIT_LEN; - size_t ssl_len = 0; - - /* The 'b64_file' is opened when parsing arguments to check that the - * file name is correct */ - parse_arguments( argc, argv ); - - if( NULL != b64_file ) - { - b64_buf = malloc( SSL_INIT_LEN ); - ssl_buf = malloc( SSL_INIT_LEN ); - - if( NULL == b64_buf || NULL == ssl_buf ) - { - printf_err( alloc_err ); - fclose( b64_file ); - b64_file = NULL; - } - } - - while( NULL != b64_file ) - { - size_t b64_len = read_next_b64_code( &b64_buf, &b64_max_len ); - if( b64_len > 0) - { - int ret; - size_t ssl_required_len = b64_len * 3 / 4 + 1; - - /* Allocate more memory if necessary. */ - if( ssl_required_len > ssl_max_len ) - { - void *ptr = realloc( ssl_buf, ssl_required_len ); - if( NULL == ptr ) - { - printf_err( alloc_err ); - fclose( b64_file ); - b64_file = NULL; - break; - } - ssl_buf = ptr; - ssl_max_len = ssl_required_len; - } - - printf( "\nDeserializing number %u:\n", ++b64_counter ); - - printf( "\nBase64 code:\n" ); - print_b64( b64_buf, b64_len ); - - ret = mbedtls_base64_decode( ssl_buf, ssl_max_len, &ssl_len, b64_buf, b64_len ); - if( ret != 0) - { - mbedtls_strerror( ret, (char*) b64_buf, b64_max_len ); - printf_err( "base64 code cannot be decoded - %s\n", b64_buf ); - continue; - } - - if( debug ) - { - printf( "\nDecoded data in hex:\n\t"); - print_hex( ssl_buf, ssl_len, 25, "\t" ); - } - - print_deserialized_ssl_context( ssl_buf, ssl_len ); - - } - else - { - fclose( b64_file ); - b64_file = NULL; - } - } - - free( b64_buf ); - free( ssl_buf ); - - if( b64_counter > 0 ) - { - printf_dbg( "Finished. Found %u base64 codes\n", b64_counter ); - } - else - { - printf( "Finished. No valid base64 code found\n" ); - } - - return 0; -} - -#endif /* MBEDTLS_X509_CRT_PARSE_C */ |