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moved box.c to box_old.c and made a new box.c with

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GraxRabble
2014-09-24 20:08:31 -04:00
parent 7ae583d19a
commit 15ab5f6bf2
3 changed files with 171 additions and 37 deletions
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demos/.gitignore
+1
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@@ -1,5 +1,6 @@
auth
box
box_old
generichash
generichashstream
hash
demos/box.c
+13 -37
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@@ -32,19 +32,17 @@ box(void)
{
unsigned char bob_pk[crypto_box_PUBLICKEYBYTES]; /* Bob public */
unsigned char bob_sk[crypto_box_SECRETKEYBYTES]; /* Bob secret */
unsigned char bob_ss[crypto_box_BEFORENMBYTES]; /* Bob session */
unsigned char alice_pk[crypto_box_PUBLICKEYBYTES]; /* Alice public */
unsigned char alice_sk[crypto_box_SECRETKEYBYTES]; /* Alice secret */
unsigned char alice_ss[crypto_box_BEFORENMBYTES]; /* Alice session */
unsigned char n[crypto_box_NONCEBYTES]; /* message nonce */
unsigned char m[BUFFER_SIZE + crypto_box_ZEROBYTES];/* plaintext */
unsigned char c[BUFFER_SIZE + crypto_box_ZEROBYTES];/* ciphertext */
unsigned char m[BUFFER_SIZE]; /* plaintext */
unsigned char c[BUFFER_SIZE + crypto_box_MACBYTES]; /* ciphertext */
size_t mlen; /* length */
int r;
puts("Example: crypto_box\n");
puts("Example: crypto_box_easy\n");
puts("Generating keypairs...\n");
crypto_box_keypair(bob_pk, bob_sk); /* generate Bob's keys */
@@ -67,17 +65,6 @@ box(void)
print_hex(alice_sk, sizeof alice_sk);
putchar('\n');
putchar('\n');
/* perform diffie hellman */
crypto_box_beforenm(bob_ss, alice_pk, bob_sk);
crypto_box_beforenm(alice_ss, bob_pk, alice_sk);
fputs("Bob shared key: ", stdout);
print_hex(bob_ss, sizeof bob_ss);
putchar('\n');
fputs("Alice shared key: ", stdout);
print_hex(alice_ss, sizeof alice_ss);
putchar('\n');
putchar('\n');
/* nonce must be generated per message, safe to send with message */
puts("Generating nonce...");
@@ -88,21 +75,16 @@ box(void)
putchar('\n');
/* read input */
mlen = prompt_input("Input your message > ",
(char*) m + crypto_box_ZEROBYTES,
sizeof m - crypto_box_ZEROBYTES);
mlen = prompt_input("Input your message > ", (char*) m, sizeof m);
/* must zero at least the padding */
sodium_memzero(m, crypto_box_ZEROBYTES);
puts("Notice the 32 bytes of zero");
print_hex(m, mlen + crypto_box_ZEROBYTES);
puts("Notice there is no padding");
print_hex(m, mlen);
putchar('\n');
putchar('\n');
/* encrypt the message */
printf("Encrypting with %s\n\n", crypto_box_primitive());
crypto_box_afternm(c, m, mlen + crypto_box_ZEROBYTES, n, bob_ss);
crypto_box_easy(c, m, mlen, n, bob_pk, alice_sk);
/* sent message */
puts("Bob sending message...\n");
@@ -111,32 +93,26 @@ box(void)
fputs("Ciphertext: ", stdout);
print_hex(n, sizeof n);
fputs("::", stdout);
print_hex(c, mlen + crypto_box_ZEROBYTES);
print_hex(c, mlen + crypto_box_MACBYTES);
putchar('\n');
putchar('\n');
/* decrypt the message */
puts("Alice opening message...");
/* must zero at least the padding */
sodium_memzero(c, crypto_box_BOXZEROBYTES);
r = crypto_box_open_afternm(
m, c, mlen + crypto_box_ZEROBYTES,
n, alice_ss);
r = crypto_box_open_easy(m, c, mlen + crypto_box_MACBYTES,
n, bob_pk, alice_sk);
puts("Notice the 32 bytes of zero");
print_hex(m, mlen + crypto_box_ZEROBYTES);
puts("Notice there is no padding");
print_hex(m, mlen);
putchar('\n');
print_verification(r);
if (r == 0) printf("Plaintext: %s\n\n", m + crypto_box_ZEROBYTES);
if (r == 0) printf("Plaintext: %s\n\n", m);
sodium_memzero(bob_pk, sizeof bob_pk); /* wipe sensitive data */
sodium_memzero(bob_sk, sizeof bob_sk);
sodium_memzero(bob_ss, sizeof bob_ss);
sodium_memzero(alice_pk, sizeof alice_pk);
sodium_memzero(alice_sk, sizeof alice_sk);
sodium_memzero(alice_ss, sizeof alice_ss);
sodium_memzero(n, sizeof n);
sodium_memzero(m, sizeof m);
sodium_memzero(c, sizeof c);
demos/box_old.c
+157
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@@ -0,0 +1,157 @@
/*
* GraxRabble
* 05 May 2014
* Demo programs for libsodium.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sodium.h> /* library header */
#include "demo_utils.h" /* utility functions shared by demos */
/*
* Shows how crypto_box_afternm works using Bob and Alice with a simple
* message. Both clients must generate their own key pair and swap public
* key. The library will perform Diffie-Hellman to generate a shared key
* for symmetric encryption.
*
* Note that crypto_box uses padding at the start of both messages.
* The padding must be zero else the encryption or decryption will fail.
*
* Encrypted messages will be 16 bytes longer because a 16 byte
* authentication token will be prepended to the message.
*
* Note the same nonce must not be used; it should be safe to use a counter.
*/
static int
box(void)
{
unsigned char bob_pk[crypto_box_PUBLICKEYBYTES]; /* Bob public */
unsigned char bob_sk[crypto_box_SECRETKEYBYTES]; /* Bob secret */
unsigned char bob_ss[crypto_box_BEFORENMBYTES]; /* Bob session */
unsigned char alice_pk[crypto_box_PUBLICKEYBYTES]; /* Alice public */
unsigned char alice_sk[crypto_box_SECRETKEYBYTES]; /* Alice secret */
unsigned char alice_ss[crypto_box_BEFORENMBYTES]; /* Alice session */
unsigned char n[crypto_box_NONCEBYTES]; /* message nonce */
unsigned char m[BUFFER_SIZE + crypto_box_ZEROBYTES];/* plaintext */
unsigned char c[BUFFER_SIZE + crypto_box_ZEROBYTES];/* ciphertext */
size_t mlen; /* length */
int r;
puts("Example: crypto_box_afternm (archaic)\n");
puts("Generating keypairs...\n");
crypto_box_keypair(bob_pk, bob_sk); /* generate Bob's keys */
crypto_box_keypair(alice_pk, alice_sk); /* generate Alice's keys */
puts("Bob");
fputs("Public: ", stdout);
print_hex(bob_pk, sizeof bob_pk);
putchar('\n');
fputs("Secret: ", stdout);
print_hex(bob_sk, sizeof bob_sk);
putchar('\n');
putchar('\n');
puts("Alice");
fputs("Public: ", stdout);
print_hex(alice_pk, sizeof alice_pk);
putchar('\n');
fputs("Secret: ", stdout);
print_hex(alice_sk, sizeof alice_sk);
putchar('\n');
putchar('\n');
/* perform diffie hellman */
crypto_box_beforenm(bob_ss, alice_pk, bob_sk);
crypto_box_beforenm(alice_ss, bob_pk, alice_sk);
fputs("Bob shared key: ", stdout);
print_hex(bob_ss, sizeof bob_ss);
putchar('\n');
fputs("Alice shared key: ", stdout);
print_hex(alice_ss, sizeof alice_ss);
putchar('\n');
putchar('\n');
/* nonce must be generated per message, safe to send with message */
puts("Generating nonce...");
randombytes_buf(n, sizeof n);
fputs("Nonce: ", stdout);
print_hex(n, sizeof n);
putchar('\n');
putchar('\n');
/* read input */
mlen = prompt_input("Input your message > ",
(char*) m + crypto_box_ZEROBYTES,
sizeof m - crypto_box_ZEROBYTES);
/* must zero at least the padding */
sodium_memzero(m, crypto_box_ZEROBYTES);
puts("Notice the 32 bytes of zero");
print_hex(m, mlen + crypto_box_ZEROBYTES);
putchar('\n');
putchar('\n');
/* encrypt the message */
printf("Encrypting with %s\n\n", crypto_box_primitive());
crypto_box_afternm(c, m, mlen + crypto_box_ZEROBYTES, n, bob_ss);
/* sent message */
puts("Bob sending message...\n");
puts("Notice the prepended 16 byte authentication token");
puts("Format: nonce::message");
fputs("Ciphertext: ", stdout);
print_hex(n, sizeof n);
fputs("::", stdout);
print_hex(c, mlen + crypto_box_ZEROBYTES);
putchar('\n');
putchar('\n');
/* decrypt the message */
puts("Alice opening message...");
/* must zero at least the padding */
sodium_memzero(c, crypto_box_BOXZEROBYTES);
r = crypto_box_open_afternm(
m, c, mlen + crypto_box_ZEROBYTES,
n, alice_ss);
puts("Notice the 32 bytes of zero");
print_hex(m, mlen + crypto_box_ZEROBYTES);
putchar('\n');
print_verification(r);
if (r == 0) printf("Plaintext: %s\n\n", m + crypto_box_ZEROBYTES);
sodium_memzero(bob_pk, sizeof bob_pk); /* wipe sensitive data */
sodium_memzero(bob_sk, sizeof bob_sk);
sodium_memzero(bob_ss, sizeof bob_ss);
sodium_memzero(alice_pk, sizeof alice_pk);
sodium_memzero(alice_sk, sizeof alice_sk);
sodium_memzero(alice_ss, sizeof alice_ss);
sodium_memzero(n, sizeof n);
sodium_memzero(m, sizeof m);
sodium_memzero(c, sizeof c);
return r;
}
int
main(int argc, char **argv)
{
int r;
sodium_init();
printf("Using LibSodium %s\n", sodium_version_string());
r = (0 == box() ? EXIT_SUCCESS : EXIT_FAILURE);
exit(r);
}