Hi can you post annotations and comments line by line for this code I have had to make for decrypting? Thank you :) *Encrypt.c *Decrypt.c #define NBITS 256 void printBN(char*msg, BIGNUM *a) { char *number_str = BN_bn2hex(a); printf("%s %s \n", msg, number_str); OPENSSL_free(number_str); } int main() { BN_CTX *ctx = BN_CTX_new(); BIGNUM *e = BN_new(); BIGNUM *n = BN_new(); BIGNUM *M = BN_new(); BIGNUM *d = BN_new(); BIGNUM *C = BN_new(); BN_hex2bn(&n, "DCBFFE3E51F62E09CE7032E2677A78946A849DC4CDDE3A4DOCB81629242FB1A5"); BN_hex2bn (&d, "74D806F9F3A62BAE331FFE3FOA68AFE35B3D2E4794148AACBC26AA381CD7D30D"); BN_hex2bn(&e, "010001"); BN_hex2bn(&c, "8COF971DF2F3672B28811407E2DABBE1DAOFEBBBDFC7DCB67396567EA1E2493F"); BN_mod_exp(m,c,d,n,ctx); printBN("m= ",m);| BN_CTX_free(ctx); return 0; }

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Hi can you post annotations and comments line by
line for this code I have had to make for
decrypting? Thank you :)
*Encrypt.c
*Decrypt.c
#define NBITS 256
void printBN(char*msg, BIGNUM *a)
{
char *number_str = BN_bn2hex(a);
printf("%s %s \n", msg, number_str);
OPENSSL_free(number_str);
}
int main()
{
BN_CTX *ctx = BN_CTX_new();
BIGNUM *e = BN_new();
BIGNUM *n = BN_new();
BIGNUM *M = BN_new();
BIGNUM *d = BN_new();
BIGNUM *c = BN_new();
BN_hex2bn (&n,
"DCBFFE3E51F62E09CE7032E2677A78946A849DC4CDDE3A4DOCB81629242FB1A5");
BN_hex2bn (&d,
"74D806F9F3A62BAE331FFE3F0A68AFE35B3D2E4794148AACBC26AA381CD7D30D");
BN_hex2bn(&e, "010001");
BN_hex2bn (&c,
"8COF971DF2F3672B28811407E2DABBE1DAOFEBBBDFC7DCB67396567EA1E2493F");
BN_mod_exp(m,c,d,n,ctx);
printBN("m= ",m);|
BN_CTX_free(ctx);
return 0;
Tab Width: 8 -
Ln 23, Col 18
INS
Transcribed Image Text:Hi can you post annotations and comments line by line for this code I have had to make for decrypting? Thank you :) *Encrypt.c *Decrypt.c #define NBITS 256 void printBN(char*msg, BIGNUM *a) { char *number_str = BN_bn2hex(a); printf("%s %s \n", msg, number_str); OPENSSL_free(number_str); } int main() { BN_CTX *ctx = BN_CTX_new(); BIGNUM *e = BN_new(); BIGNUM *n = BN_new(); BIGNUM *M = BN_new(); BIGNUM *d = BN_new(); BIGNUM *c = BN_new(); BN_hex2bn (&n, "DCBFFE3E51F62E09CE7032E2677A78946A849DC4CDDE3A4DOCB81629242FB1A5"); BN_hex2bn (&d, "74D806F9F3A62BAE331FFE3F0A68AFE35B3D2E4794148AACBC26AA381CD7D30D"); BN_hex2bn(&e, "010001"); BN_hex2bn (&c, "8COF971DF2F3672B28811407E2DABBE1DAOFEBBBDFC7DCB67396567EA1E2493F"); BN_mod_exp(m,c,d,n,ctx); printBN("m= ",m);| BN_CTX_free(ctx); return 0; Tab Width: 8 - Ln 23, Col 18 INS
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