Mercurial > dropbear
view libtomcrypt/demos/encrypt.c @ 1822:fa6ff07dcc77
signkey: remove !! from SHA1 digest (#130)
Remove the "!!" chars from message when printing the key-fingerprint, as it's
confusing users. They have been added when switching from MD5, but SHA1 can be
considered as standard today.
Signed-off-by: Sven Roederer <[email protected]>
author | Sven Roederer <devel-sven@geroedel.de> |
---|---|
date | Thu, 19 Aug 2021 17:39:31 +0200 |
parents | f849a5ca2efc |
children |
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/* encrypt V1.1 Fri Oct 18 04:28:03 NZDT 2002 */ /* File de/encryption, using libtomcrypt */ /* Written by Daniel Richards <[email protected]> */ /* Help from Tom St Denis with various bits */ /* This code is public domain, no rights reserved. */ /* Encrypts by default, -d flag enables decryption */ /* ie: ./encrypt blowfish story.txt story.ct */ /* ./encrypt -d blowfish story.ct story.pt */ #include <tomcrypt.h> int errno; int usage(char *name) { int x; printf("Usage: %s [-d](ecrypt) cipher infile outfile\nCiphers:\n", name); for (x = 0; cipher_descriptor[x].name != NULL; x++) { printf("%s\n",cipher_descriptor[x].name); } exit(1); } void register_algs(void) { int x; #ifdef LTC_RIJNDAEL register_cipher (&aes_desc); #endif #ifdef LTC_BLOWFISH register_cipher (&blowfish_desc); #endif #ifdef LTC_XTEA register_cipher (&xtea_desc); #endif #ifdef LTC_RC5 register_cipher (&rc5_desc); #endif #ifdef LTC_RC6 register_cipher (&rc6_desc); #endif #ifdef LTC_SAFERP register_cipher (&saferp_desc); #endif #ifdef LTC_TWOFISH register_cipher (&twofish_desc); #endif #ifdef LTC_SAFER register_cipher (&safer_k64_desc); register_cipher (&safer_sk64_desc); register_cipher (&safer_k128_desc); register_cipher (&safer_sk128_desc); #endif #ifdef LTC_RC2 register_cipher (&rc2_desc); #endif #ifdef LTC_DES register_cipher (&des_desc); register_cipher (&des3_desc); #endif #ifdef LTC_CAST5 register_cipher (&cast5_desc); #endif #ifdef LTC_NOEKEON register_cipher (&noekeon_desc); #endif #ifdef LTC_SKIPJACK register_cipher (&skipjack_desc); #endif #ifdef LTC_KHAZAD register_cipher (&khazad_desc); #endif #ifdef LTC_ANUBIS register_cipher (&anubis_desc); #endif if (register_hash(&sha256_desc) == -1) { printf("Error registering LTC_SHA256\n"); exit(-1); } if (register_prng(&yarrow_desc) == -1) { printf("Error registering yarrow PRNG\n"); exit(-1); } if (register_prng(&sprng_desc) == -1) { printf("Error registering sprng PRNG\n"); exit(-1); } } int main(int argc, char *argv[]) { unsigned char plaintext[512],ciphertext[512]; unsigned char tmpkey[512], key[MAXBLOCKSIZE], IV[MAXBLOCKSIZE]; unsigned char inbuf[512]; /* i/o block size */ unsigned long outlen, y, ivsize, x, decrypt; symmetric_CTR ctr; int cipher_idx, hash_idx, ks; char *infile, *outfile, *cipher; prng_state prng; FILE *fdin, *fdout; /* register algs, so they can be printed */ register_algs(); if (argc < 4) { return usage(argv[0]); } if (!strcmp(argv[1], "-d")) { decrypt = 1; cipher = argv[2]; infile = argv[3]; outfile = argv[4]; } else { decrypt = 0; cipher = argv[1]; infile = argv[2]; outfile = argv[3]; } /* file handles setup */ fdin = fopen(infile,"rb"); if (fdin == NULL) { perror("Can't open input for reading"); exit(-1); } fdout = fopen(outfile,"wb"); if (fdout == NULL) { perror("Can't open output for writing"); exit(-1); } cipher_idx = find_cipher(cipher); if (cipher_idx == -1) { printf("Invalid cipher entered on command line.\n"); exit(-1); } hash_idx = find_hash("sha256"); if (hash_idx == -1) { printf("LTC_SHA256 not found...?\n"); exit(-1); } ivsize = cipher_descriptor[cipher_idx].block_length; ks = hash_descriptor[hash_idx].hashsize; if (cipher_descriptor[cipher_idx].keysize(&ks) != CRYPT_OK) { printf("Invalid keysize???\n"); exit(-1); } printf("\nEnter key: "); fgets((char *)tmpkey,sizeof(tmpkey), stdin); outlen = sizeof(key); if ((errno = hash_memory(hash_idx,tmpkey,strlen((char *)tmpkey),key,&outlen)) != CRYPT_OK) { printf("Error hashing key: %s\n", error_to_string(errno)); exit(-1); } if (decrypt) { /* Need to read in IV */ if (fread(IV,1,ivsize,fdin) != ivsize) { printf("Error reading IV from input.\n"); exit(-1); } if ((errno = ctr_start(cipher_idx,IV,key,ks,0,CTR_COUNTER_LITTLE_ENDIAN,&ctr)) != CRYPT_OK) { printf("ctr_start error: %s\n",error_to_string(errno)); exit(-1); } /* IV done */ do { y = fread(inbuf,1,sizeof(inbuf),fdin); if ((errno = ctr_decrypt(inbuf,plaintext,y,&ctr)) != CRYPT_OK) { printf("ctr_decrypt error: %s\n", error_to_string(errno)); exit(-1); } if (fwrite(plaintext,1,y,fdout) != y) { printf("Error writing to file.\n"); exit(-1); } } while (y == sizeof(inbuf)); fclose(fdin); fclose(fdout); } else { /* encrypt */ /* Setup yarrow for random bytes for IV */ if ((errno = rng_make_prng(128, find_prng("yarrow"), &prng, NULL)) != CRYPT_OK) { printf("Error setting up PRNG, %s\n", error_to_string(errno)); } /* You can use rng_get_bytes on platforms that support it */ /* x = rng_get_bytes(IV,ivsize,NULL);*/ x = yarrow_read(IV,ivsize,&prng); if (x != ivsize) { printf("Error reading PRNG for IV required.\n"); exit(-1); } if (fwrite(IV,1,ivsize,fdout) != ivsize) { printf("Error writing IV to output.\n"); exit(-1); } if ((errno = ctr_start(cipher_idx,IV,key,ks,0,CTR_COUNTER_LITTLE_ENDIAN,&ctr)) != CRYPT_OK) { printf("ctr_start error: %s\n",error_to_string(errno)); exit(-1); } do { y = fread(inbuf,1,sizeof(inbuf),fdin); if ((errno = ctr_encrypt(inbuf,ciphertext,y,&ctr)) != CRYPT_OK) { printf("ctr_encrypt error: %s\n", error_to_string(errno)); exit(-1); } if (fwrite(ciphertext,1,y,fdout) != y) { printf("Error writing to output.\n"); exit(-1); } } while (y == sizeof(inbuf)); fclose(fdout); fclose(fdin); } return 0; } /* $Source$ */ /* $Revision$ */ /* $Date$ */