I want to do padding with PKCS7 :
char *test1 = "azertyuiopqsdfgh";
char *test2 = malloc(32*sizeof(char));
memcpy(test2, test1, strlen(test1));
char pad = (char)(32-strlen(test1));
printf("pad = %d\n", pad);
for(int i = strlen(test1) ; i < 32 ; i++) {
test2[i] = pad;
}
for (int i = 0 ; i < 32 ; i++)
printf("%x ", test2[i]);
printf("\n");
I obtain :
pad = 16
61 7a 65 72 74 79 75 69 6f 70 71 73 64 66 67 68 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10
But i want :
pad = 16
61 7a 65 72 74 79 75 69 6f 70 71 73 64 66 67 68 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16
How can i modify my code ?
Thanks in advance.
With
printf("%x ", test2[i]);
You are printing in hexadecimal ( %x ) whereas with
printf("pad = %d\n", pad);` you are printing in decimal (%d).
And (decimal) 16 => (hexa) 10 , So you are displaying the right thing.
You could probably play a bit with your printing to display 16 instead of 10 but I don't think this is what you are searching for.
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