301N November 2018 / Mbed 2 deprecated encrypt

15:21 9nov

Dependencies:   mbed mbedtls

main.cpp@5:cc8680cda38f, 2018-11-09 (annotated)

Committer:
kpan
Date:
Fri Nov 09 10:27:44 2018 +0000
Revision:
5:cc8680cda38f
Parent:
4:98332985e06f
Child:
6:13ef02c7dd17
W/ errString;

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;
kpan 5:cc8680cda38f 15 char errbuf[] = "";
preyaa4 0:5d1b6c97e2fe 16 mbedtls_pk_context pk;
preyaa4 0:5d1b6c97e2fe 17
preyaa4 0:5d1b6c97e2fe 18 mbedtls_pk_init( &pk );
preyaa4 0:5d1b6c97e2fe 19 const unsigned char key[]="-----BEGIN RSA PUBLIC KEY-----"
kpan 3:7a6787f99da2 20 "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDMYfnvWtC8Id5bPKae5yXSxQTt"
kpan 3:7a6787f99da2 21 "+Zpul6AnnZWfI2TtIarvjHBFUtXRo96y7hoL4VWOPKGCsRqMFDkrbeUjRrx8iL91"
kpan 3:7a6787f99da2 22 "4/srnyf6sh9c8Zk04xEOpK1ypvBz+Ks4uZObtjnnitf0NBGdjMKxveTq+VE7BWUI"
kpan 3:7a6787f99da2 23 "yQjtQ8mbDOsiLLvh7wIDAQAB"
kpan 3:7a6787f99da2 24 "-----END RSA PUBLIC KEY-----";
kpan 3:7a6787f99da2 25
preyaa4 0:5d1b6c97e2fe 26
preyaa4 0:5d1b6c97e2fe 27 /*
preyaa4 0:5d1b6c97e2fe 28 * Read the RSA public key
preyaa4 0:5d1b6c97e2fe 29 */
kpan 3:7a6787f99da2 30 if( ( ret = mbedtls_pk_parse_public_key( &pk, key,sizeof(key)) ) != 0 ) {
preyaa4 0:5d1b6c97e2fe 31 printf( " failed\n ! mbedtls_pk_parse_public_key returned -0x%04x\n", -ret );
kpan 1:c8f7fe71d151 32 g = b = 1;
kpan 1:c8f7fe71d151 33 r = 0;
preyaa4 0:5d1b6c97e2fe 34 goto exit;
preyaa4 0:5d1b6c97e2fe 35 }
kpan 3:7a6787f99da2 36
kpan 3:7a6787f99da2 37 unsigned char buf[MBEDTLS_MPI_MAX_SIZE];
preyaa4 0:5d1b6c97e2fe 38 size_t olen = 0;
preyaa4 0:5d1b6c97e2fe 39
preyaa4 0:5d1b6c97e2fe 40 /*
preyaa4 0:5d1b6c97e2fe 41 * Calculate the RSA encryption of the data.
preyaa4 0:5d1b6c97e2fe 42 */
kpan 4:98332985e06f 43 pc.printf("\n . Generating the encrypted value" );
preyaa4 0:5d1b6c97e2fe 44 fflush( stdout );
kpan 3:7a6787f99da2 45 const unsigned char to_encrypt[] = "HelloWorld";
preyaa4 0:5d1b6c97e2fe 46 mbedtls_ctr_drbg_context ctr_drbg;
kpan 3:7a6787f99da2 47
preyaa4 0:5d1b6c97e2fe 48 if( ( ret = mbedtls_pk_encrypt( &pk, to_encrypt, sizeof(to_encrypt),
preyaa4 0:5d1b6c97e2fe 49 buf, &olen, sizeof(buf),
kpan 3:7a6787f99da2 50 mbedtls_ctr_drbg_random, &ctr_drbg ) ) != 0 ) {
kpan 5:cc8680cda38f 51 mbedtls_strerror( ret, errbuf, 200 );
kpan 5:cc8680cda38f 52 pc.printf( " failed\n ! mbedtls_pk_encrypt returned -0x%04x\n%s\n", -ret, errbuf );
kpan 5:cc8680cda38f 53 mbedtls_printf("Last error was: -0x%04x - %s\n\n", (int) -ret, errbuf );
kpan 5:cc8680cda38f 54
kpan 1:c8f7fe71d151 55 r = g = 1;
kpan 1:c8f7fe71d151 56 b = 0;
preyaa4 0:5d1b6c97e2fe 57 goto exit;
preyaa4 0:5d1b6c97e2fe 58 }
kpan 3:7a6787f99da2 59 exit:
preyaa4 0:5d1b6c97e2fe 60 return 0;
kpan 2:cee7ee508f77 61 }