static int rsa_sign_wrap( void *ctx, md_type_t md_alg,
const unsigned char *hash, size_t hash_len,
unsigned char *sig, size_t *sig_len,
int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
{
*sig_len = ((rsa_context *) ctx)->len;
return( rsa_pkcs1_sign( (rsa_context *) ctx, f_rng, p_rng, RSA_PRIVATE,
md_alg, (unsigned int) hash_len, hash, sig ) );
}
int
rsa_sign (const uint8_t *raw_message, uint8_t *output, int msg_len,
struct key_data *kd)
{
mpi P1, Q1, H;
int r;
unsigned char temp[RSA_SIGNATURE_LENGTH];
mpi_init (&P1, &Q1, &H, NULL);
rsa_init (&rsa_ctx, RSA_PKCS_V15, 0);
rsa_ctx.len = KEY_CONTENT_LEN;
mpi_lset (&rsa_ctx.E, 0x10001);
mpi_read_binary (&rsa_ctx.P, &kd->data[0], rsa_ctx.len / 2);
mpi_read_binary (&rsa_ctx.Q, &kd->data[KEY_CONTENT_LEN/2], rsa_ctx.len / 2);
#if 0 /* Using CRT, we don't use N */
mpi_mul_mpi (&rsa_ctx.N, &rsa_ctx.P, &rsa_ctx.Q);
#endif
mpi_sub_int (&P1, &rsa_ctx.P, 1);
mpi_sub_int (&Q1, &rsa_ctx.Q, 1);
mpi_mul_mpi (&H, &P1, &Q1);
mpi_inv_mod (&rsa_ctx.D , &rsa_ctx.E, &H);
mpi_mod_mpi (&rsa_ctx.DP, &rsa_ctx.D, &P1);
mpi_mod_mpi (&rsa_ctx.DQ, &rsa_ctx.D, &Q1);
mpi_inv_mod (&rsa_ctx.QP, &rsa_ctx.Q, &rsa_ctx.P);
mpi_free (&P1, &Q1, &H, NULL);
DEBUG_INFO ("RSA sign...");
r = rsa_pkcs1_sign (&rsa_ctx, RSA_PRIVATE, SIG_RSA_RAW,
msg_len, raw_message, temp);
memcpy (output, temp, RSA_SIGNATURE_LENGTH);
rsa_free (&rsa_ctx);
if (r < 0)
{
DEBUG_INFO ("fail:");
DEBUG_SHORT (r);
return r;
}
else
{
res_APDU_size = RSA_SIGNATURE_LENGTH;
DEBUG_INFO ("done.\r\n");
GPG_SUCCESS ();
return 0;
}
}
int ctr_rsa_sign_hash(const u8 hash[0x20], u8 signature[0x100], rsakey2048* key)
{
ctr_rsa_context ctx;
u32 result;
ctr_rsa_init(&ctx, key);
result = rsa_pkcs1_verify(&ctx.rsa, RSA_PUBLIC, SIG_RSA_SHA256, 0x20, hash, (u8*)signature);
result = rsa_pkcs1_sign(&ctx.rsa, RSA_PRIVATE, SIG_RSA_SHA256, 0x20, hash, signature);
ctr_rsa_free(&ctx);
if (result == 0)
return 1;
else
return 0;
}
int main( int argc, char *argv[] )
{
FILE *f;
int ret = 1;
rsa_context rsa;
entropy_context entropy;
ctr_drbg_context ctr_drbg;
unsigned char hash[20];
unsigned char buf[POLARSSL_MPI_MAX_SIZE];
char filename[512];
const char *pers = "rsa_sign_pss";
entropy_init( &entropy );
rsa_init( &rsa, RSA_PKCS_V21, POLARSSL_MD_SHA1 );
if( argc != 3 )
{
printf( "usage: rsa_sign_pss <key_file> <filename>\n" );
#if defined(_WIN32)
printf( "\n" );
#endif
goto exit;
}
printf( "\n . Seeding the random number generator..." );
fflush( stdout );
if( ( ret = ctr_drbg_init( &ctr_drbg, entropy_func, &entropy,
(const unsigned char *) pers,
strlen( pers ) ) ) != 0 )
{
printf( " failed\n ! ctr_drbg_init returned %d\n", ret );
goto exit;
}
printf( "\n . Reading private key from '%s'", argv[1] );
fflush( stdout );
if( ( ret = x509parse_keyfile( &rsa, argv[1], "" ) ) != 0 )
{
ret = 1;
printf( " failed\n ! Could not open '%s'\n", argv[1] );
goto exit;
}
/*
* Compute the SHA-1 hash of the input file,
* then calculate the RSA signature of the hash.
*/
printf( "\n . Generating the RSA/SHA-1 signature" );
fflush( stdout );
if( ( ret = sha1_file( argv[2], hash ) ) != 0 )
{
printf( " failed\n ! Could not open or read %s\n\n", argv[2] );
goto exit;
}
if( ( ret = rsa_pkcs1_sign( &rsa, ctr_drbg_random, &ctr_drbg,
RSA_PRIVATE, SIG_RSA_SHA1,
20, hash, buf ) ) != 0 )
{
printf( " failed\n ! rsa_pkcs1_sign returned %d\n\n", ret );
goto exit;
}
/*
* Write the signature into <filename>-sig.txt
*/
snprintf( filename, 512, "%s.sig", argv[2] );
if( ( f = fopen( filename, "wb+" ) ) == NULL )
{
ret = 1;
printf( " failed\n ! Could not create %s\n\n", filename );
goto exit;
}
if( fwrite( buf, 1, rsa.len, f ) != (size_t) rsa.len )
{
printf( "failed\n ! fwrite failed\n\n" );
goto exit;
}
fclose( f );
printf( "\n . Done (created \"%s\")\n\n", filename );
exit:
#if defined(_WIN32)
printf( " + Press Enter to exit this program.\n" );
fflush( stdout ); getchar();
#endif
return( ret );
}
/*
* Checkup routine
*/
int rsa_self_test( int verbose )
{
int len;
rsa_context rsa;
unsigned char sha1sum[20];
unsigned char rsa_plaintext[PT_LEN];
unsigned char rsa_decrypted[PT_LEN];
unsigned char rsa_ciphertext[KEY_LEN];
memset( &rsa, 0, sizeof( rsa_context ) );
rsa.len = KEY_LEN;
mpi_read_string( &rsa.N , 16, RSA_N );
mpi_read_string( &rsa.E , 16, RSA_E );
mpi_read_string( &rsa.D , 16, RSA_D );
mpi_read_string( &rsa.P , 16, RSA_P );
mpi_read_string( &rsa.Q , 16, RSA_Q );
mpi_read_string( &rsa.DP, 16, RSA_DP );
mpi_read_string( &rsa.DQ, 16, RSA_DQ );
mpi_read_string( &rsa.QP, 16, RSA_QP );
if( verbose != 0 )
printf( " RSA key validation: " );
if( rsa_check_pubkey( &rsa ) != 0 ||
rsa_check_privkey( &rsa ) != 0 )
{
if( verbose != 0 )
printf( "failed\n" );
return( 1 );
}
if( verbose != 0 )
printf( "passed\n PKCS#1 encryption : " );
memcpy( rsa_plaintext, RSA_PT, PT_LEN );
if( rsa_pkcs1_encrypt( &rsa, RSA_PUBLIC, PT_LEN,
rsa_plaintext, rsa_ciphertext ) != 0 )
{
if( verbose != 0 )
printf( "failed\n" );
return( 1 );
}
if( verbose != 0 )
printf( "passed\n PKCS#1 decryption : " );
if( rsa_pkcs1_decrypt( &rsa, RSA_PRIVATE, &len,
rsa_ciphertext, rsa_decrypted,
sizeof(rsa_decrypted) ) != 0 )
{
if( verbose != 0 )
printf( "failed\n" );
return( 1 );
}
if( memcmp( rsa_decrypted, rsa_plaintext, len ) != 0 )
{
if( verbose != 0 )
printf( "failed\n" );
return( 1 );
}
if( verbose != 0 )
printf( "passed\n PKCS#1 data sign : " );
sha1( rsa_plaintext, PT_LEN, sha1sum );
if( rsa_pkcs1_sign( &rsa, RSA_PRIVATE, SIG_RSA_SHA1, 20,
sha1sum, rsa_ciphertext ) != 0 )
{
if( verbose != 0 )
printf( "failed\n" );
return( 1 );
}
if( verbose != 0 )
printf( "passed\n PKCS#1 sig. verify: " );
if( rsa_pkcs1_verify( &rsa, RSA_PUBLIC, SIG_RSA_SHA1, 20,
sha1sum, rsa_ciphertext ) != 0 )
{
if( verbose != 0 )
printf( "failed\n" );
return( 1 );
}
if( verbose != 0 )
printf( "passed\n\n" );
rsa_free( &rsa );
return( 0 );
}
int main( int argc, char *argv[] )
{
FILE *f;
int ret, i;
rsa_context rsa;
unsigned char hash[20];
unsigned char buf[512];
ret = 1;
if( argc != 2 )
{
printf( "usage: rsa_sign <filename>\n" );
#ifdef WIN32
printf( "\n" );
#endif
goto exit;
}
printf( "\n . Reading private key from rsa_priv.txt" );
fflush( stdout );
if( ( f = fopen( "rsa_priv.txt", "rb" ) ) == NULL )
{
ret = 1;
printf( " failed\n ! Could not open rsa_priv.txt\n" \
" ! Please run rsa_genkey first\n\n" );
goto exit;
}
rsa_init( &rsa, RSA_PKCS_V15, 0, NULL, NULL );
if( ( ret = mpi_read_file( &rsa.N , 16, f ) ) != 0 ||
( ret = mpi_read_file( &rsa.E , 16, f ) ) != 0 ||
( ret = mpi_read_file( &rsa.D , 16, f ) ) != 0 ||
( ret = mpi_read_file( &rsa.P , 16, f ) ) != 0 ||
( ret = mpi_read_file( &rsa.Q , 16, f ) ) != 0 ||
( ret = mpi_read_file( &rsa.DP, 16, f ) ) != 0 ||
( ret = mpi_read_file( &rsa.DQ, 16, f ) ) != 0 ||
( ret = mpi_read_file( &rsa.QP, 16, f ) ) != 0 )
{
printf( " failed\n ! mpi_read_file returned %d\n\n", ret );
goto exit;
}
rsa.len = ( mpi_msb( &rsa.N ) + 7 ) >> 3;
fclose( f );
/*
* Compute the SHA-1 hash of the input file,
* then calculate the RSA signature of the hash.
*/
printf( "\n . Generating the RSA/SHA-1 signature" );
fflush( stdout );
if( ( ret = sha1_file( argv[1], hash ) ) != 0 )
{
printf( " failed\n ! Could not open or read %s\n\n", argv[1] );
goto exit;
}
if( ( ret = rsa_pkcs1_sign( &rsa, RSA_PRIVATE, SIG_RSA_SHA1,
20, hash, buf ) ) != 0 )
{
printf( " failed\n ! rsa_pkcs1_sign returned %d\n\n", ret );
goto exit;
}
/*
* Write the signature into <filename>-sig.txt
*/
memcpy( argv[1] + strlen( argv[1] ), ".sig", 5 );
if( ( f = fopen( argv[1], "wb+" ) ) == NULL )
{
ret = 1;
printf( " failed\n ! Could not create %s\n\n", argv[1] );
goto exit;
}
for( i = 0; i < rsa.len; i++ )
fprintf( f, "%02X%s", buf[i],
( i + 1 ) % 16 == 0 ? "\r\n" : " " );
fclose( f );
printf( "\n . Done (created \"%s\")\n\n", argv[1] );
exit:
#ifdef WIN32
printf( " + Press Enter to exit this program.\n" );
fflush( stdout ); getchar();
#endif
return( ret );
}
int main(int argc, char** argv) {
int ret;
FILE* fp;
// Assumes no private key password
ret = x509parse_keyfile(&privrsa, (char*)PRIVATEKEYFILE, NULL);
if (ret != 0) {
printf(" ! x509parse_keyfile returned %d\n\n", ret);
return -1;
}
if (rsa_check_pubkey(&privrsa) != 0 || rsa_check_privkey(&privrsa) != 0) {
printf("public/private key validation failed.\n");
return -2;
}
printf("Private/Public key loaded. Encrypting message.\n");
if (rsa_pkcs1_encrypt(&privrsa, RSA_PUBLIC, strlen(MESSAGE),
(unsigned char*)MESSAGE, rsa_ciphertext) != 0) {
printf("Encryption of message failed\n");
return -3;
}
printf("Encryption complete. Output in message.crypt\n");
fp = fopen("message.crypt", "wb");
if (!fp) {
printf("Error opening message.crypt\n");
return -4;
}
fwrite(rsa_ciphertext, 128, 1, fp);
fclose(fp);
memset(&rsa_ciphertext, 0, sizeof(rsa_ciphertext));
// Now sign the message.
sha1((unsigned char*)MESSAGE, strlen(MESSAGE), hash);
// for (int i = 0; i < 20; i++)
// printf("%02X%s", hash[i], (i + 1) % 16 == 0 ? "\r\n" : " ");
// if (rsa_pkcs1_sign(&privrsa, RSA_PRIVATE, RSA_SHA1, 20, hash, rsa_ciphertext) != 0) {
if (rsa_pkcs1_sign(&privrsa, RSA_PRIVATE, RSA_SHA1, 20, hash, rsa_ciphertext) != 0) {
printf("Signature failed.\n");
return -5;
}
printf("Signing complete. Output in message.sig\n");
fp = fopen("message.sig", "wb");
if (!fp) {
printf("Error opening message.sig\n");
return -4;
}
fwrite(rsa_ciphertext, 128, 1, fp);
fclose(fp);
return 0;
}
/*
* Checkup routine
*/
int main ( void )
{
int len;
rsa_context rsa;
unsigned char md5sum[16];
unsigned char rsa_plaintext[PTLEN];
unsigned char rsa_decrypted[PTLEN];
unsigned char rsa_ciphertext[CTLEN];
memset( &rsa, 0, sizeof( rsa ) );
rsa.len = 128;
mpi_read( &rsa.N , "9292758453063D803DD603D5E777D788" \
"8ED1D5BF35786190FA2F23EBC0848AEA" \
"DDA92CA6C3D80B32C4D109BE0F36D6AE" \
"7130B9CED7ACDF54CFC7555AC14EEBAB" \
"93A89813FBF3C4F8066D2D800F7C38A8" \
"1AE31942917403FF4946B0A83D3D3E05" \
"EE57C6F5F5606FB5D4BC6CD34EE0801A" \
"5E94BB77B07507233A0BC7BAC8F90F79", 16 );
mpi_read( &rsa.E , "10001", 16 );
mpi_read( &rsa.D , "24BF6185468786FDD303083D25E64EFC" \
"66CA472BC44D253102F8B4A9D3BFA750" \
"91386C0077937FE33FA3252D28855837" \
"AE1B484A8A9A45F7EE8C0C634F99E8CD" \
"DF79C5CE07EE72C7F123142198164234" \
"CABB724CF78B8173B9F880FC86322407" \
"AF1FEDFDDE2BEB674CA15F3E81A1521E" \
"071513A1E85B5DFA031F21ECAE91A34D", 16 );
mpi_read( &rsa.P , "C36D0EB7FCD285223CFB5AABA5BDA3D8" \
"2C01CAD19EA484A87EA4377637E75500" \
"FCB2005C5C7DD6EC4AC023CDA285D796" \
"C3D9E75E1EFC42488BB4F1D13AC30A57", 16 );
mpi_read( &rsa.Q , "C000DF51A7C77AE8D7C7370C1FF55B69" \
"E211C2B9E5DB1ED0BF61D0D9899620F4" \
"910E4168387E3C30AA1E00C339A79508" \
"8452DD96A9A5EA5D9DCA68DA636032AF", 16 );
mpi_read( &rsa.DP, "C1ACF567564274FB07A0BBAD5D26E298" \
"3C94D22288ACD763FD8E5600ED4A702D" \
"F84198A5F06C2E72236AE490C93F07F8" \
"3CC559CD27BC2D1CA488811730BB5725", 16 );
mpi_read( &rsa.DQ, "4959CBF6F8FEF750AEE6977C155579C7" \
"D8AAEA56749EA28623272E4F7D0592AF" \
"7C1F1313CAC9471B5C523BFE592F517B" \
"407A1BD76C164B93DA2D32A383E58357", 16 );
mpi_read( &rsa.QP, "9AE7FBC99546432DF71896FC239EADAE" \
"F38D18D2B2F0E2DD275AA977E2BF4411" \
"F5A3B2A5D33605AEBBCCBA7FEB9F2D2F" \
"A74206CEC169D74BF5A8C50D6F48EA08", 16 );
printf( " RSA key validation: " );
if( rsa_check_pubkey( &rsa ) != 0 ||
rsa_check_privkey( &rsa ) != 0 )
{
printf( "failed\n" );
return( 1 );
}
printf( "passed\n PKCS#1 encryption : " );
memcpy( rsa_plaintext,
"\xAA\xBB\xCC\x03\x02\x01\x00\xFF\xFF\xFF\xFF\xFF" \
"\x11\x22\x33\x0A\x0B\x0C\xCC\xDD\xDD\xDD\xDD\xDD", PTLEN );
len = CTLEN;
if( rsa_pkcs1_encrypt( &rsa, rsa_plaintext, PTLEN,
rsa_ciphertext, &len ) != 0 )
{
printf( "failed\n" );
return( 1 );
}
printf( "passed\n PKCS#1 decryption : " );
len = sizeof( rsa_decrypted );
if( rsa_pkcs1_decrypt( &rsa, rsa_ciphertext, CTLEN,
rsa_decrypted, &len ) != 0 ||
memcmp( rsa_decrypted, rsa_plaintext, len ) != 0 )
{
printf( "failed\n" );
return( 1 );
}
printf( "passed\n" );
#if 0
md5_csum( rsa_plaintext, PTLEN, md5sum );
if( rsa_pkcs1_sign( &rsa, RSA_MD5, md5sum, 16,
rsa_ciphertext, CTLEN ) != 0 )
{
printf( "failed\n" );
return( 1 );
}
printf( "passed\n PKCS#1 sig. verify: " );
if( rsa_pkcs1_verify( &rsa, RSA_MD5, md5sum, 16,
rsa_ciphertext, CTLEN ) != 0 )
{
printf( "failed\n" );
return( 1 );
}
printf( "passed\n\n" );
#endif
rsa_free( &rsa );
return( 0 );
}
/*
* Checkup routine
*/
int rsa_self_test( int verbose )
{
int ret = 0;
#if defined(POLARSSL_PKCS1_V15)
size_t len;
rsa_context rsa;
unsigned char rsa_plaintext[PT_LEN];
unsigned char rsa_decrypted[PT_LEN];
unsigned char rsa_ciphertext[KEY_LEN];
#if defined(POLARSSL_SHA1_C)
unsigned char sha1sum[20];
#endif
rsa_init( &rsa, RSA_PKCS_V15, 0 );
rsa.len = KEY_LEN;
MPI_CHK( mpi_read_string( &rsa.N , 16, RSA_N ) );
MPI_CHK( mpi_read_string( &rsa.E , 16, RSA_E ) );
MPI_CHK( mpi_read_string( &rsa.D , 16, RSA_D ) );
MPI_CHK( mpi_read_string( &rsa.P , 16, RSA_P ) );
MPI_CHK( mpi_read_string( &rsa.Q , 16, RSA_Q ) );
MPI_CHK( mpi_read_string( &rsa.DP, 16, RSA_DP ) );
MPI_CHK( mpi_read_string( &rsa.DQ, 16, RSA_DQ ) );
MPI_CHK( mpi_read_string( &rsa.QP, 16, RSA_QP ) );
if( verbose != 0 )
polarssl_printf( " RSA key validation: " );
if( rsa_check_pubkey( &rsa ) != 0 ||
rsa_check_privkey( &rsa ) != 0 )
{
if( verbose != 0 )
polarssl_printf( "failed\n" );
return( 1 );
}
if( verbose != 0 )
polarssl_printf( "passed\n PKCS#1 encryption : " );
memcpy( rsa_plaintext, RSA_PT, PT_LEN );
if( rsa_pkcs1_encrypt( &rsa, myrand, NULL, RSA_PUBLIC, PT_LEN,
rsa_plaintext, rsa_ciphertext ) != 0 )
{
if( verbose != 0 )
polarssl_printf( "failed\n" );
return( 1 );
}
if( verbose != 0 )
polarssl_printf( "passed\n PKCS#1 decryption : " );
if( rsa_pkcs1_decrypt( &rsa, myrand, NULL, RSA_PRIVATE, &len,
rsa_ciphertext, rsa_decrypted,
sizeof(rsa_decrypted) ) != 0 )
{
if( verbose != 0 )
polarssl_printf( "failed\n" );
return( 1 );
}
if( memcmp( rsa_decrypted, rsa_plaintext, len ) != 0 )
{
if( verbose != 0 )
polarssl_printf( "failed\n" );
return( 1 );
}
#if defined(POLARSSL_SHA1_C)
if( verbose != 0 )
polarssl_printf( "passed\n PKCS#1 data sign : " );
sha1( rsa_plaintext, PT_LEN, sha1sum );
if( rsa_pkcs1_sign( &rsa, myrand, NULL, RSA_PRIVATE, POLARSSL_MD_SHA1, 0,
sha1sum, rsa_ciphertext ) != 0 )
{
if( verbose != 0 )
polarssl_printf( "failed\n" );
return( 1 );
}
if( verbose != 0 )
polarssl_printf( "passed\n PKCS#1 sig. verify: " );
if( rsa_pkcs1_verify( &rsa, NULL, NULL, RSA_PUBLIC, POLARSSL_MD_SHA1, 0,
sha1sum, rsa_ciphertext ) != 0 )
{
if( verbose != 0 )
polarssl_printf( "failed\n" );
return( 1 );
}
if( verbose != 0 )
polarssl_printf( "passed\n\n" );
#endif /* POLARSSL_SHA1_C */
cleanup:
rsa_free( &rsa );
#else /* POLARSSL_PKCS1_V15 */
((void) verbose);
#endif /* POLARSSL_PKCS1_V15 */
return( ret );
}
/*
* Checkup routine
*/
int rsa_self_test( void )
{
int len;
rsa_context rsa;
uchar md5sum[16];
uchar decrypted[PTLEN];
uchar ciphertext[CTLEN];
memset( &rsa, 0, sizeof( rsa ) );
rsa.len = 128;
#if 0
mpi_read( &rsa.N , "9292758453063D803DD603D5E777D788" \
"8ED1D5BF35786190FA2F23EBC0848AEA" \
"DDA92CA6C3D80B32C4D109BE0F36D6AE" \
"7130B9CED7ACDF54CFC7555AC14EEBAB" \
"93A89813FBF3C4F8066D2D800F7C38A8" \
"1AE31942917403FF4946B0A83D3D3E05" \
"EE57C6F5F5606FB5D4BC6CD34EE0801A" \
"5E94BB77B07507233A0BC7BAC8F90F79", 16 );
mpi_read( &rsa.E , "10001", 16 );
mpi_read( &rsa.D , "24BF6185468786FDD303083D25E64EFC" \
"66CA472BC44D253102F8B4A9D3BFA750" \
"91386C0077937FE33FA3252D28855837" \
"AE1B484A8A9A45F7EE8C0C634F99E8CD" \
"DF79C5CE07EE72C7F123142198164234" \
"CABB724CF78B8173B9F880FC86322407" \
"AF1FEDFDDE2BEB674CA15F3E81A1521E" \
"071513A1E85B5DFA031F21ECAE91A34D", 16 );
mpi_read( &rsa.P , "C36D0EB7FCD285223CFB5AABA5BDA3D8" \
"2C01CAD19EA484A87EA4377637E75500" \
"FCB2005C5C7DD6EC4AC023CDA285D796" \
"C3D9E75E1EFC42488BB4F1D13AC30A57", 16 );
mpi_read( &rsa.Q , "C000DF51A7C77AE8D7C7370C1FF55B69" \
"E211C2B9E5DB1ED0BF61D0D9899620F4" \
"910E4168387E3C30AA1E00C339A79508" \
"8452DD96A9A5EA5D9DCA68DA636032AF", 16 );
mpi_read( &rsa.DP, "C1ACF567564274FB07A0BBAD5D26E298" \
"3C94D22288ACD763FD8E5600ED4A702D" \
"F84198A5F06C2E72236AE490C93F07F8" \
"3CC559CD27BC2D1CA488811730BB5725", 16 );
mpi_read( &rsa.DQ, "4959CBF6F8FEF750AEE6977C155579C7" \
"D8AAEA56749EA28623272E4F7D0592AF" \
"7C1F1313CAC9471B5C523BFE592F517B" \
"407A1BD76C164B93DA2D32A383E58357", 16 );
mpi_read( &rsa.QP, "9AE7FBC99546432DF71896FC239EADAE" \
"F38D18D2B2F0E2DD275AA977E2BF4411" \
"F5A3B2A5D33605AEBBCCBA7FEB9F2D2F" \
"A74206CEC169D74BF5A8C50D6F48EA08", 16 );
#else
mpi_read( &rsa.N , "EEF43DF231F4FEFDA3FF0576F864912B" \
"F5D51D627C5911F4794F54C8BE178C66" \
"FD9C447BE512735818E93CF88AB1696C" \
"1C634A898DBFCE384F74CD347B715419" \
"EAE05016842B752F127CC224535C4708" \
"8DE7566D50F0CFC013B2592BAB1E042A" \
"76239E5262D931B84BDAB640028AFE7C" \
"39E2B75A353EABF827854EE249C6EA45", 16 );
mpi_read( &rsa.E , "010001", 16 );
mpi_read( &rsa.D , "B6F6044861BFF94E34379BF3901550A2" \
"9C44658F772EABF4C8BDD9692B43D499" \
"372E63B189A02AF91579E0D95D38A243" \
"C928AD75CD3743AB120B98E3CA70E7B6" \
"C5B3C1EA2065EF5A6347F80B247044D4" \
"775C4379C2286F8724E0DFE859F808E8" \
"BFBE3D257EF84E3A455C5BC452F5600E" \
"5CDD62818D7E937C7D4C9819C1FAF331", 16 );
mpi_read( &rsa.P , "FBD24AF8F6132E9E1D07B73CFD6D0ECE" \
"6E49DD602EF0F4D6FE6DF66493F016EA" \
"C19FF290749194145C3229D0CC57B31F" \
"199AE2819572271CFE40279063B5BEAB", 16 );
mpi_read( &rsa.Q , "F2EB4A3E41438F2690EC2DED0198E4BD" \
"7ABA01D374A27C92BDAEA3803FF8584C" \
"2B923C95868B4C53DCEEA3A750D7B702" \
"748522C8BF781CCED4E76B52A9DD3ACF", 16 );
mpi_read( &rsa.DP, "3947752C39F4D506BBFDB44D582BC551" \
"693EBDEF11DE5722CC0EC11BD196ABEF" \
"CC0910C890EB482E756627A2C9C82D03" \
"26F4D70EB8AA9580FFC821F7B2E6752F", 16 );
mpi_read( &rsa.DQ, "5A71D28DC55CF322A7D8D7ECA3A89A9A" \
"15E4C5A3468CED16F1BAE133721DF43A" \
"400ACDB5DA8768DEDCA69996455A5BD0" \
"7533D0D4AFBD77F4667ED78DCAA30D2F", 16 );
mpi_read( &rsa.QP, "81267EDB140CE8F07CA92F508FEA134B" \
"23C871D428C6EF870F08FFF2AD46D210" \
"8FCD67E28FF95E8E332B5EEE16EB8784" \
"AB3D1E59B078CB93EF5C6E0F12419439", 16 );
#endif
printf( " RSA key validation: " );
if( rsa_check_pubkey( &rsa ) != 0 ||
rsa_check_privkey( &rsa ) != 0 )
{
printf( "failed\n" );
return( 1 );
}
printf( "passed\n PKCS#1 encryption : " );
if( rsa_pkcs1_encrypt( &rsa, plaintext, PTLEN,
ciphertext, CTLEN ) != 0 )
{
printf( "failed\n" );
return( 1 );
}
printf( "passed\n PKCS#1 decryption : " );
len = sizeof( decrypted );
if( rsa_pkcs1_decrypt( &rsa, ciphertext, CTLEN,
decrypted, &len ) != 0 ||
memcmp( decrypted, plaintext, len ) != 0 )
{
printf( "failed\n" );
return( 1 );
}
printf( "passed\n PKCS#1 data sign : " );
md5_csum( plaintext, PTLEN, md5sum );
if( rsa_pkcs1_sign( &rsa, RSA_MD5, md5sum, 16,
ciphertext, CTLEN ) != 0 )
{
printf( "failed\n" );
return( 1 );
}
printf( "passed\n PKCS#1 sig. verify: " );
if( rsa_pkcs1_verify( &rsa, RSA_MD5, md5sum, 16,
ciphertext, CTLEN ) != 0 )
{
printf( "failed\n" );
return( 1 );
}
printf( "passed\n\n" );
rsa_free( &rsa );
return( 0 );
}
int message_rsa_encrypt(VCRYPT_CTX *ctx, rsa_context *public_rsa,
const char *username, const char *message, VCRYPT_PACKET **packet)
{
int ret;
/*
* format:
* 1 byte protocol version
* 2 bytes encryption key size in bytes
* 2 bytes signature key size in bytes
* ciphertext
* signature
*
*/
if (!public_rsa->len)
return -ERR_NO_PUBKEY;
// we dont encrypt null terminating char, as this creates a vector of attack
int plain_len = strlen(message);
if (plain_len == 0)
return -ERR_ENCRYPTION_ERROR;
size_t plain_chunk_len = public_rsa->len - 11;
// get packet size
int plain_chunks = ceil(plain_len / (float) plain_chunk_len);
int ciphertext_len = plain_chunks * public_rsa->len;
// space for signature
ciphertext_len += ctx->ssl_req.rsa.len;
*packet = packet_new(DEST_CLIENT, username, REQ_MESSAGE_SEND,
ciphertext_len + 5);
if (!*packet)
return -ERR_MALLOC;
// TODO: add ciphertext stealing (form signature) to save bandwidth (i.e. use signature as padding)
int chunk;
int chunk_len;
uint8_t *in = (uint8_t*) message, *out = (uint8_t*) (*packet)->payload;
*out++ = VCRYPT_PROTOCOL_VERSION;
*((uint16_t*) out) = public_rsa->len;
out += 2;
*((uint16_t*) out) = ctx->ssl_req.rsa.len;
out += 2;
for (chunk = 0; chunk < plain_chunks; chunk++, in += plain_chunk_len, out +=
public_rsa->len) {
// last usually has different length
chunk_len =
chunk == plain_chunks - 1 ?
plain_len % plain_chunk_len : plain_chunk_len;
if ((ret = rsa_pkcs1_encrypt(public_rsa, ctr_drbg_random,
&ctx->ssl_req.ctr_drbg, RSA_PUBLIC, chunk_len, in, out) != 0)) {
free(packet);
return -ERR_ENCRYPTION_ERROR;
}
}
unsigned char hash[64];
sha4_context sha_ctx;
sha4_starts(&sha_ctx, 1);
sha4_update(&sha_ctx, (uint8_t*) message, plain_len);
sha4_finish(&sha_ctx, hash);
if ((ret = rsa_pkcs1_sign(&ctx->ssl_req.rsa, NULL, NULL, RSA_PRIVATE,
ctx->ssl_req.rsa.hash_id, sizeof hash, hash, out) != 0)) {
free(packet);
return -ERR_SIGN_ERROR;
}
return 0;
}
int x509_write_cert_req( unsigned char *buf, size_t size, rsa_context *rsa,
x509_req_name *req_name, int hash_id )
{
int ret;
char sig_oid[10];
unsigned char *c, *c2;
unsigned char hash[64];
unsigned char sig[POLARSSL_MPI_MAX_SIZE];
unsigned char tmp_buf[2048];
size_t sub_len = 0, pub_len = 0, sig_len = 0;
size_t len = 0;
x509_req_name *cur = req_name;
c = tmp_buf + 2048 - 1;
ASN1_CHK_ADD( len, asn1_write_len( &c, tmp_buf, 0 ) );
ASN1_CHK_ADD( len, asn1_write_tag( &c, tmp_buf, ASN1_CONSTRUCTED | ASN1_CONTEXT_SPECIFIC ) );
ASN1_CHK_ADD( pub_len, asn1_write_mpi( &c, tmp_buf, &rsa->E ) );
ASN1_CHK_ADD( pub_len, asn1_write_mpi( &c, tmp_buf, &rsa->N ) );
ASN1_CHK_ADD( pub_len, asn1_write_len( &c, tmp_buf, pub_len ) );
ASN1_CHK_ADD( pub_len, asn1_write_tag( &c, tmp_buf, ASN1_CONSTRUCTED | ASN1_SEQUENCE ) );
if( c - tmp_buf < 1 )
return( POLARSSL_ERR_ASN1_BUF_TOO_SMALL );
*--c = 0;
pub_len += 1;
ASN1_CHK_ADD( pub_len, asn1_write_len( &c, tmp_buf, pub_len ) );
ASN1_CHK_ADD( pub_len, asn1_write_tag( &c, tmp_buf, ASN1_BIT_STRING ) );
ASN1_CHK_ADD( pub_len, asn1_write_algorithm_identifier( &c, tmp_buf, OID_PKCS1_RSA ) );
len += pub_len;
ASN1_CHK_ADD( len, asn1_write_len( &c, tmp_buf, pub_len ) );
ASN1_CHK_ADD( len, asn1_write_tag( &c, tmp_buf, ASN1_CONSTRUCTED | ASN1_SEQUENCE ) );
while( cur != NULL )
{
ASN1_CHK_ADD( sub_len, x509_write_name( &c, tmp_buf, cur->oid, cur->name ) );
cur = cur->next;
}
len += sub_len;
ASN1_CHK_ADD( len, asn1_write_len( &c, tmp_buf, sub_len ) );
ASN1_CHK_ADD( len, asn1_write_tag( &c, tmp_buf, ASN1_CONSTRUCTED | ASN1_SEQUENCE ) );
ASN1_CHK_ADD( len, asn1_write_int( &c, tmp_buf, 0 ) );
ASN1_CHK_ADD( len, asn1_write_len( &c, tmp_buf, len ) );
ASN1_CHK_ADD( len, asn1_write_tag( &c, tmp_buf, ASN1_CONSTRUCTED | ASN1_SEQUENCE ) );
x509_hash( c, len, hash_id, hash );
rsa_pkcs1_sign( rsa, NULL, NULL, RSA_PRIVATE, hash_id, 0, hash, sig );
// Generate correct OID
//
memcpy( sig_oid, OID_PKCS1, 8 );
sig_oid[8] = hash_id;
sig_oid[9] = '\0';
c2 = buf + size - 1;
ASN1_CHK_ADD( sig_len, x509_write_sig( &c2, buf, sig_oid, sig, rsa->len ) );
c2 -= len;
memcpy( c2, c, len );
len += sig_len;
ASN1_CHK_ADD( len, asn1_write_len( &c2, buf, len ) );
ASN1_CHK_ADD( len, asn1_write_tag( &c2, buf, ASN1_CONSTRUCTED | ASN1_SEQUENCE ) );
return( len );
}