Practice / Mbed 2 deprecated encrypt

15:21 9nov

Dependencies:   mbed mbedtls

main.cpp@4:98332985e06f, 2018-11-09 (annotated)

Committer:
kpan
Date:
Fri Nov 09 10:05:59 2018 +0000
Revision:
4:98332985e06f
Parent:
3:7a6787f99da2
Child:
5:cc8680cda38f
Serial IO;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
preyaa4 0:5d1b6c97e2fe 1 #include "mbed.h"
preyaa4 0:5d1b6c97e2fe 2 #include "mbedtls/pk.h"
preyaa4 0:5d1b6c97e2fe 3 #include "mbedtls/ctr_drbg.h"
kpan 1:c8f7fe71d151 4 PwmOut r(LED_RED);
kpan 1:c8f7fe71d151 5 PwmOut g(LED_GREEN);
kpan 1:c8f7fe71d151 6 PwmOut b(LED_BLUE);
kpan 3:7a6787f99da2 7 Serial pc(USBTX, USBRX);
kpan 3:7a6787f99da2 8 int main()
kpan 3:7a6787f99da2 9 {
kpan 3:7a6787f99da2 10 pc.printf("INITIALIZING...");
kpan 3:7a6787f99da2 11 wait(1);
kpan 3:7a6787f99da2 12 r = g = b = 1;
kpan 3:7a6787f99da2 13 g = 0;
preyaa4 0:5d1b6c97e2fe 14 int ret = 0;
preyaa4 0:5d1b6c97e2fe 15 mbedtls_pk_context pk;
preyaa4 0:5d1b6c97e2fe 16
preyaa4 0:5d1b6c97e2fe 17 mbedtls_pk_init( &pk );
preyaa4 0:5d1b6c97e2fe 18 const unsigned char key[]="-----BEGIN RSA PUBLIC KEY-----"
kpan 3:7a6787f99da2 19 "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDMYfnvWtC8Id5bPKae5yXSxQTt"
kpan 3:7a6787f99da2 20 "+Zpul6AnnZWfI2TtIarvjHBFUtXRo96y7hoL4VWOPKGCsRqMFDkrbeUjRrx8iL91"
kpan 3:7a6787f99da2 21 "4/srnyf6sh9c8Zk04xEOpK1ypvBz+Ks4uZObtjnnitf0NBGdjMKxveTq+VE7BWUI"
kpan 3:7a6787f99da2 22 "yQjtQ8mbDOsiLLvh7wIDAQAB"
kpan 3:7a6787f99da2 23 "-----END RSA PUBLIC KEY-----";
kpan 3:7a6787f99da2 24
preyaa4 0:5d1b6c97e2fe 25
preyaa4 0:5d1b6c97e2fe 26 /*
preyaa4 0:5d1b6c97e2fe 27 * Read the RSA public key
preyaa4 0:5d1b6c97e2fe 28 */
kpan 3:7a6787f99da2 29 if( ( ret = mbedtls_pk_parse_public_key( &pk, key,sizeof(key)) ) != 0 ) {
preyaa4 0:5d1b6c97e2fe 30 printf( " failed\n ! mbedtls_pk_parse_public_key returned -0x%04x\n", -ret );
kpan 1:c8f7fe71d151 31 g = b = 1;
kpan 1:c8f7fe71d151 32 r = 0;
preyaa4 0:5d1b6c97e2fe 33 goto exit;
preyaa4 0:5d1b6c97e2fe 34 }
kpan 3:7a6787f99da2 35
kpan 3:7a6787f99da2 36 unsigned char buf[MBEDTLS_MPI_MAX_SIZE];
preyaa4 0:5d1b6c97e2fe 37 size_t olen = 0;
preyaa4 0:5d1b6c97e2fe 38
preyaa4 0:5d1b6c97e2fe 39 /*
preyaa4 0:5d1b6c97e2fe 40 * Calculate the RSA encryption of the data.
preyaa4 0:5d1b6c97e2fe 41 */
kpan 4:98332985e06f 42 pc.printf("\n . Generating the encrypted value" );
preyaa4 0:5d1b6c97e2fe 43 fflush( stdout );
kpan 3:7a6787f99da2 44 const unsigned char to_encrypt[] = "HelloWorld";
preyaa4 0:5d1b6c97e2fe 45 mbedtls_ctr_drbg_context ctr_drbg;
kpan 3:7a6787f99da2 46
preyaa4 0:5d1b6c97e2fe 47 if( ( ret = mbedtls_pk_encrypt( &pk, to_encrypt, sizeof(to_encrypt),
preyaa4 0:5d1b6c97e2fe 48 buf, &olen, sizeof(buf),
kpan 3:7a6787f99da2 49 mbedtls_ctr_drbg_random, &ctr_drbg ) ) != 0 ) {
kpan 3:7a6787f99da2 50 pc.printf( " failed\n ! mbedtls_pk_encrypt returned -0x%04x\n", -ret );
kpan 1:c8f7fe71d151 51 r = g = 1;
kpan 1:c8f7fe71d151 52 b = 0;
preyaa4 0:5d1b6c97e2fe 53 goto exit;
preyaa4 0:5d1b6c97e2fe 54 }
kpan 3:7a6787f99da2 55 exit:
preyaa4 0:5d1b6c97e2fe 56 return 0;
kpan 2:cee7ee508f77 57 }