633 lines
18 KiB
C
633 lines
18 KiB
C
/*
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* Copyright 2022 The Tongsuo Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://github.com/Tongsuo-Project/Tongsuo/blob/master/LICENSE.txt
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*/
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#include <openssl/opensslconf.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include "apps.h"
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#include "progs.h"
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#include <openssl/bio.h>
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#include <openssl/err.h>
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#include <openssl/bn.h>
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#include <openssl/pem.h>
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#include <openssl/rand.h>
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#include <openssl/paillier.h>
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#include <internal/cryptlib.h>
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static int verbose = 0, noout = 0;
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typedef enum OPTION_choice {
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OPT_COMMON,
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OPT_KEYGEN, OPT_PUBGEN,
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OPT_KEY, OPT_PUB,
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OPT_ENCRYPT, OPT_DECRYPT, OPT_ADD, OPT_ADD_PLAIN, OPT_SUB, OPT_MUL,
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OPT_IN, OPT_KEY_IN,
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OPT_OUT, OPT_NOOUT,
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OPT_TEXT, OPT_VERBOSE,
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OPT_PROV_ENUM
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} OPTION_CHOICE;
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const OPTIONS paillier_options[] = {
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{OPT_HELP_STR, 1, '-', "Usage: %s [action options] [input/output options] [arg1] [arg2]\n"},
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OPT_SECTION("General"),
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{"help", OPT_HELP, '-', "Display this summary"},
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OPT_SECTION("Action"),
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{"keygen", OPT_KEYGEN, '-', "Generate a paillier private key, usage: -keygen 2048, 2048 is the size of key in bits "},
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{"pubgen", OPT_PUBGEN, '-', "Generate a paillier public key"},
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{"key", OPT_KEY, '-', "Display/Parse a paillier private key"},
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{"pub", OPT_PUB, '-', "Display/Parse a paillier public key"},
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{"encrypt", OPT_ENCRYPT, '-', "Encrypt a number with the paillier public key, usage: -encrypt 99, 99 is an example number"},
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{"decrypt", OPT_DECRYPT, '-', "Decrypt a ciphertext using the paillier private key, usage: -decrypt c1, c1 is an example ciphertext"},
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{"add", OPT_ADD, '-', "Paillier homomorphic addition: add two ciphertexts, usage: -add c1 c2, c1 and c2 are tow example ciphertexts, result: E(c1) + E(c2)"},
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{"add_plain", OPT_ADD_PLAIN, '-', "Paillier homomorphic addition: add a ciphertext to a plaintext, usage: -add_plain c1 99, c1 is an example ciphertext, 99 is an example number, result: E(c1) + 99"},
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{"sub", OPT_SUB, '-', "Paillier homomorphic subtraction: sub two ciphertexts, usage: -sub c1 c2, c1 and c2 are tow example ciphertexts, result: E(c1) - E(c2)"},
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{"mul", OPT_MUL, '-', "Paillier homomorphic scalar multiplication: multiply a ciphertext by a known plaintext, usage: -mul c1 99, c1 is an example ciphertext, 99 is an example number, result: E(c1) * 99"},
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OPT_SECTION("Input"),
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{"in", OPT_IN, 's', "Input file"},
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{"key_in", OPT_KEY_IN, 's', "Input is a paillier private key used to generate public key"},
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OPT_SECTION("Output"),
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{"out", OPT_OUT, '>', "Output the paillier key to specified file"},
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{"noout", OPT_NOOUT, '-', "Don't print paillier key out"},
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{"text", OPT_TEXT, '-', "Print the paillier key in text"},
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{"verbose", OPT_VERBOSE, '-', "Verbose output"},
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OPT_PARAMETERS(),
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{"arg1", 0, 0, "Argument for keygen/encryption/decryption, or the first argument of a homomorphic operation"},
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{"arg2", 0, 0, "The second argument of a homomorphic operation"},
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{NULL}
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};
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static int paillier_buf2hexstr_print(BIO *bio, unsigned char *buf, size_t size,
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char *field, int text)
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{
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unsigned char *out = NULL;
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size_t out_n;
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BIO_printf(bio, "%s: ", field);
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if (text) {
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BIO_puts(bio, "\n");
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BIO_indent(bio, 4, 4);
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BIO_hex_string(bio, 4, 16, buf, size);
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} else {
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out_n = size * 2 + 1;
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if (!(out = OPENSSL_zalloc(out_n))
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|| !OPENSSL_buf2hexstr_ex((char *)out, out_n, NULL, buf, size, '\0')) {
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OPENSSL_free(out);
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return 0;
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}
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BIO_printf(bio, "%s", out);
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OPENSSL_free(out);
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}
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BIO_puts(bio, "\n");
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return 1;
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}
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static int paillier_ciphertext_print(BIO *bio, PAILLIER_CTX *ctx,
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PAILLIER_CIPHERTEXT *c,
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char *field, int text)
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{
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int ret = 0;
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size_t size;
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unsigned char *buf = NULL;
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size = PAILLIER_CIPHERTEXT_encode(ctx, NULL, 0, c, 0);
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if (!(buf = OPENSSL_zalloc(size)))
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goto end;
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if (!PAILLIER_CIPHERTEXT_encode(ctx, buf, size, c, 0))
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goto end;
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ret = paillier_buf2hexstr_print(bio, buf, size, field, text);
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end:
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OPENSSL_free(buf);
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return ret;
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}
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static int paillier_keygen(char *outfile, int bits, int text)
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{
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int ret = 0;
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BIO *bio = NULL;
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PAILLIER_KEY *pail_key = NULL;
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pail_key = PAILLIER_KEY_new();
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if (pail_key == NULL
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|| !PAILLIER_KEY_generate_key(pail_key, bits))
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goto end;
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if (!(bio = bio_open_owner(outfile, FORMAT_PEM, 1)))
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goto end;
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if (text && !PAILLIER_KEY_print(bio, pail_key, 0))
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goto end;
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if (!PEM_write_bio_PAILLIER_PrivateKey(bio, pail_key))
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goto end;
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ret = 1;
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end:
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BIO_free(bio);
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PAILLIER_KEY_free(pail_key);
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return ret;
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}
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static int paillier_pubgen(PAILLIER_KEY *key, char *outfile, int text)
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{
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int ret = 0;
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BIO *bio = NULL;
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if (key == NULL || !(bio = bio_open_owner(outfile, FORMAT_PEM, 1)))
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goto end;
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if (text && !PAILLIER_KEY_print(bio, key, 0))
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goto end;
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if (!PEM_write_bio_PAILLIER_PublicKey(bio, key))
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goto end;
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ret = 1;
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end:
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BIO_free(bio);
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return ret;
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}
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static int paillier_print(PAILLIER_KEY *key, char *outfile, int text)
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{
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int ret = 0;
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BIO *bio = NULL;
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if (key == NULL
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|| !(bio = bio_open_owner(outfile, FORMAT_PEM, 1)))
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goto end;
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if (text && !PAILLIER_KEY_print(bio, key, 0))
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goto end;
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if (!noout) {
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BIO_printf(bio_err, "writing paillier key\n");
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if (PAILLIER_KEY_type(key) == PAILLIER_KEY_TYPE_PRIVATE) {
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if (!PEM_write_bio_PAILLIER_PrivateKey(bio, key))
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goto end;
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} else if (!PEM_write_bio_PAILLIER_PublicKey(bio, key))
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goto end;
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}
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ret = 1;
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end:
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BIO_free(bio);
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return ret;
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}
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static int paillier_encrypt(PAILLIER_CTX *ctx, int plain, char *outfile, int text)
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{
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BIO *bio = NULL;
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int ret = 0;
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PAILLIER_CIPHERTEXT *r = NULL;
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if (ctx == NULL || !(bio = bio_open_owner(outfile, FORMAT_PEM, 1)))
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goto end;
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if (!(r = PAILLIER_CIPHERTEXT_new(ctx)))
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goto end;
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if (!PAILLIER_encrypt(ctx, r, plain))
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goto end;
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BIO_puts(bio, "paillier encrypt\n");
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BIO_printf(bio, "plaintext: %d\n", plain);
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ret = paillier_ciphertext_print(bio, ctx, r, "ciphertext", text);
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end:
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PAILLIER_CIPHERTEXT_free(r);
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BIO_free(bio);
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return ret;
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}
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static int paillier_decrypt(PAILLIER_CTX *ctx, char *ciphertext,
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char *outfile, int text)
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{
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BIO *bio = NULL;
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int ret = 0;
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unsigned char *buf = NULL;
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size_t buf_n, len;
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int32_t r = 0;
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PAILLIER_CIPHERTEXT *c = NULL;
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if (ctx == NULL || ciphertext == NULL || !(bio = bio_open_owner(outfile, FORMAT_PEM, 1)))
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goto end;
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buf_n = strlen(ciphertext) / 2;
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if (buf_n < 1)
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goto end;
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if (!(buf = OPENSSL_zalloc(buf_n))
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|| !OPENSSL_hexstr2buf_ex(buf, buf_n, &len, ciphertext, '\0')
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|| !(c = PAILLIER_CIPHERTEXT_new(ctx))
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|| !PAILLIER_CIPHERTEXT_decode(ctx, c, buf, len)
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|| !PAILLIER_decrypt(ctx, &r, c))
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goto end;
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BIO_puts(bio, "paillier decrypt\n");
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ret = paillier_buf2hexstr_print(bio, buf, len, "ciphertext", text);
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BIO_printf(bio, "plaintext: %d\n", r);
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end:
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OPENSSL_free(buf);
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PAILLIER_CIPHERTEXT_free(c);
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BIO_free(bio);
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return ret;
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}
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static int paillier_add(PAILLIER_CTX *ctx, char *in1, char *in2,
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char *outfile, int text)
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{
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BIO *bio = NULL;
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int ret = 0;
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size_t buf1_n, buf2_n, len1, len2;
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unsigned char *buf1 = NULL, *buf2 = NULL;
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PAILLIER_CIPHERTEXT *r = NULL, *c1 = NULL, *c2 = NULL;
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if (ctx == NULL || in1 == NULL || in2 == NULL || !(bio = bio_open_owner(outfile, FORMAT_PEM, 1)))
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goto end;
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buf1_n = strlen(in1) / 2;
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buf2_n = strlen(in2) / 2;
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if (buf1_n <= 1 || buf2_n <= 1)
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goto end;
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if (!(buf1 = OPENSSL_zalloc(buf1_n))
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|| !(buf2 = OPENSSL_zalloc(buf2_n))
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|| !OPENSSL_hexstr2buf_ex(buf1, buf1_n, &len1, in1, '\0')
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|| !OPENSSL_hexstr2buf_ex(buf2, buf2_n, &len2, in2, '\0')
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|| !(r = PAILLIER_CIPHERTEXT_new(ctx))
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|| !(c1 = PAILLIER_CIPHERTEXT_new(ctx))
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|| !(c2 = PAILLIER_CIPHERTEXT_new(ctx))
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|| !PAILLIER_CIPHERTEXT_decode(ctx, c1, buf1, len1)
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|| !PAILLIER_CIPHERTEXT_decode(ctx, c2, buf2, len2)
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|| !PAILLIER_add(ctx, r, c1, c2))
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goto end;
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BIO_puts(bio, "paillier add (result = c1 + c2)\n");
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BIO_printf(bio, "c1: %s\n", in1);
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BIO_printf(bio, "c2: %s\n", in2);
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ret = paillier_ciphertext_print(bio, ctx, r, "result", text);
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end:
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OPENSSL_free(buf1);
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OPENSSL_free(buf2);
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PAILLIER_CIPHERTEXT_free(c1);
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PAILLIER_CIPHERTEXT_free(c2);
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PAILLIER_CIPHERTEXT_free(r);
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BIO_free(bio);
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return ret;
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}
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static int paillier_add_plain(PAILLIER_CTX *ctx, char *in1, int32_t plain,
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char *outfile, int text)
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{
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BIO *bio = NULL;
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int ret = 0;
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size_t buf1_n, len1;
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unsigned char *buf1 = NULL;
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PAILLIER_CIPHERTEXT *r = NULL, *c1 = NULL;
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if (ctx == NULL || in1 == NULL || !(bio = bio_open_owner(outfile, FORMAT_PEM, 1)))
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goto end;
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buf1_n = strlen(in1) / 2;
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if (buf1_n <= 1)
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goto end;
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if (!(buf1 = OPENSSL_zalloc(buf1_n))
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|| !OPENSSL_hexstr2buf_ex(buf1, buf1_n, &len1, in1, '\0')
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|| !(r = PAILLIER_CIPHERTEXT_new(ctx))
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|| !(c1 = PAILLIER_CIPHERTEXT_new(ctx))
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|| !PAILLIER_CIPHERTEXT_decode(ctx, c1, buf1, len1)
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|| !PAILLIER_add_plain(ctx, r, c1, plain))
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goto end;
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BIO_puts(bio, "paillier addition (result = c1 + plaintext)\n");
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BIO_printf(bio, "c1: %s\n", in1);
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BIO_printf(bio, "plaintext: %d\n", plain);
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ret = paillier_ciphertext_print(bio, ctx, r, "result", text);
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end:
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OPENSSL_free(buf1);
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PAILLIER_CIPHERTEXT_free(c1);
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PAILLIER_CIPHERTEXT_free(r);
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BIO_free(bio);
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return ret;
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}
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static int paillier_sub(PAILLIER_CTX *ctx, char *in1, char *in2,
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char *outfile, int text)
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{
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BIO *bio = NULL;
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int ret = 0;
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size_t buf1_n, buf2_n, len1, len2;
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unsigned char *buf1 = NULL, *buf2 = NULL;
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PAILLIER_CIPHERTEXT *r = NULL, *c1 = NULL, *c2 = NULL;
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if (ctx == NULL || in1 == NULL || in2 == NULL || !(bio = bio_open_owner(outfile, FORMAT_PEM, 1)))
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goto end;
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buf1_n = strlen(in1) / 2;
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buf2_n = strlen(in2) / 2;
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if (buf1_n <= 1 || buf2_n <= 1)
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goto end;
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if (!(buf1 = OPENSSL_zalloc(buf1_n))
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|| !(buf2 = OPENSSL_zalloc(buf2_n))
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|| !OPENSSL_hexstr2buf_ex(buf1, buf1_n, &len1, in1, '\0')
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|| !OPENSSL_hexstr2buf_ex(buf2, buf2_n, &len2, in2, '\0')
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|| !(r = PAILLIER_CIPHERTEXT_new(ctx))
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|| !(c1 = PAILLIER_CIPHERTEXT_new(ctx))
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|| !(c2 = PAILLIER_CIPHERTEXT_new(ctx))
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|| !PAILLIER_CIPHERTEXT_decode(ctx, c1, buf1, len1)
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|| !PAILLIER_CIPHERTEXT_decode(ctx, c2, buf2, len2)
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|| !PAILLIER_sub(ctx, r, c1, c2))
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goto end;
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BIO_puts(bio, "paillier subtraction (result = c1 - c2)\n");
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BIO_printf(bio, "c1: %s\n", in1);
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BIO_printf(bio, "c2: %s\n", in2);
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ret = paillier_ciphertext_print(bio, ctx, r, "result", text);
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ret = 1;
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end:
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OPENSSL_free(buf1);
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OPENSSL_free(buf2);
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PAILLIER_CIPHERTEXT_free(c1);
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PAILLIER_CIPHERTEXT_free(c2);
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PAILLIER_CIPHERTEXT_free(r);
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BIO_free(bio);
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return ret;
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}
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static int paillier_mul(PAILLIER_CTX *ctx, char *in1, int32_t plain,
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char *outfile, int text)
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{
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BIO *bio = NULL;
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int ret = 0;
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size_t buf1_n, len1;
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unsigned char *buf1 = NULL;
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PAILLIER_CIPHERTEXT *r = NULL, *c1 = NULL;
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if (ctx == NULL || in1 == NULL || !(bio = bio_open_owner(outfile, FORMAT_PEM, 1)))
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goto end;
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buf1_n = strlen(in1) / 2;
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if (buf1_n <= 1)
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goto end;
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if (!(buf1 = OPENSSL_zalloc(buf1_n))
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|| !OPENSSL_hexstr2buf_ex(buf1, buf1_n, &len1, in1, '\0')
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|| !(r = PAILLIER_CIPHERTEXT_new(ctx))
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|| !(c1 = PAILLIER_CIPHERTEXT_new(ctx))
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|| !PAILLIER_CIPHERTEXT_decode(ctx, c1, buf1, len1)
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|| !PAILLIER_mul(ctx, r, c1, plain))
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goto end;
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BIO_puts(bio, "paillier scalar multiplication (result = c1 * plaintext)\n");
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BIO_printf(bio, "c1: %s\n", in1);
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BIO_printf(bio, "plaintext: %d\n", plain);
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ret = paillier_ciphertext_print(bio, ctx, r, "result", text);
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ret = 1;
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end:
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OPENSSL_free(buf1);
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PAILLIER_CIPHERTEXT_free(c1);
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PAILLIER_CIPHERTEXT_free(r);
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BIO_free(bio);
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return ret;
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}
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int paillier_main(int argc, char **argv)
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{
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BIO *in = NULL;
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PAILLIER_KEY *pail_key = NULL;
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PAILLIER_CTX *ctx = NULL;
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int ret = 1, action_sum = 0, text = 0;
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int keygen = 0, pubgen = 0, key = 0, pub = 0;
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int encrypt = 0, decrypt = 0, add = 0, add_plain = 0, sub = 0, mul = 0;
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int plain = 0;
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char *infile = NULL, *outfile = NULL;
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char *prog;
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char *arg1 = NULL, *arg2 = NULL;
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OPTION_CHOICE o;
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prog = opt_init(argc, argv, paillier_options);
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if ((o = opt_next()) != OPT_EOF) {
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switch (o) {
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case OPT_EOF:
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case OPT_ERR:
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opthelp1:
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BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
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goto end;
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case OPT_HELP:
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ret = 0;
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opt_help(paillier_options);
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goto end;
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case OPT_KEYGEN:
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keygen = 1;
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break;
|
|
case OPT_PUBGEN:
|
|
pubgen = 1;
|
|
break;
|
|
case OPT_KEY:
|
|
key = 1;
|
|
break;
|
|
case OPT_PUB:
|
|
pub = 1;
|
|
break;
|
|
case OPT_ENCRYPT:
|
|
encrypt = 1;
|
|
break;
|
|
case OPT_DECRYPT:
|
|
decrypt = 1;
|
|
break;
|
|
case OPT_ADD:
|
|
add = 1;
|
|
break;
|
|
case OPT_ADD_PLAIN:
|
|
add_plain = 1;
|
|
break;
|
|
case OPT_SUB:
|
|
sub = 1;
|
|
break;
|
|
case OPT_MUL:
|
|
mul = 1;
|
|
break;
|
|
default:
|
|
goto opthelp1;
|
|
}
|
|
}
|
|
|
|
action_sum = keygen + pubgen + key + pub + encrypt + decrypt + add + add_plain + sub + mul;
|
|
if (action_sum == 0) {
|
|
BIO_printf(bio_err, "No action parameter specified.\n");
|
|
goto opthelp1;
|
|
} else if (action_sum != 1) {
|
|
BIO_printf(bio_err, "Only one action parameter must be specified.\n");
|
|
goto opthelp1;
|
|
}
|
|
|
|
while ((o = opt_next()) != OPT_EOF) {
|
|
switch (o) {
|
|
case OPT_EOF:
|
|
case OPT_ERR:
|
|
opthelp2:
|
|
BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
|
|
goto end;
|
|
case OPT_HELP:
|
|
ret = 0;
|
|
opt_help(paillier_options);
|
|
goto end;
|
|
case OPT_IN:
|
|
case OPT_KEY_IN:
|
|
infile = opt_arg();
|
|
break;
|
|
case OPT_OUT:
|
|
outfile = opt_arg();
|
|
break;
|
|
case OPT_NOOUT:
|
|
noout = 1;
|
|
break;
|
|
case OPT_TEXT:
|
|
text = 1;
|
|
break;
|
|
case OPT_VERBOSE:
|
|
verbose = 1;
|
|
break;
|
|
default:
|
|
goto opthelp2;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* One optional argument, the bitsize. */
|
|
argc = opt_num_rest();
|
|
argv = opt_rest();
|
|
|
|
if (keygen && argc != 1) {
|
|
BIO_printf(bio_err, "Extra arguments given.\n");
|
|
goto opthelp2;
|
|
}
|
|
|
|
if (argc == 1) {
|
|
arg1 = argv[0];
|
|
if (encrypt) {
|
|
if (*arg1 == '_')
|
|
arg1++;
|
|
|
|
if (!opt_int(arg1, &plain))
|
|
goto end;
|
|
|
|
if (*argv[0] == '_')
|
|
plain = -plain;
|
|
} else if (keygen) {
|
|
if (!opt_int(arg1, &plain) || plain <= 0)
|
|
goto end;
|
|
}
|
|
} else if (argc == 2) {
|
|
arg1 = argv[0];
|
|
arg2 = argv[1];
|
|
if (add_plain || mul) {
|
|
if (*arg2 == '_')
|
|
arg2++;
|
|
|
|
if (!opt_int(arg2, &plain))
|
|
goto end;
|
|
|
|
if (*argv[1] == '_')
|
|
plain = -plain;
|
|
}
|
|
} else if (argc > 2) {
|
|
BIO_printf(bio_err, "Extra arguments given.\n");
|
|
goto opthelp2;
|
|
}
|
|
|
|
if (!app_RAND_load())
|
|
goto end;
|
|
|
|
if (verbose) {
|
|
/* TODO */
|
|
}
|
|
|
|
if (infile != NULL) {
|
|
in = bio_open_default(infile, 'r', FORMAT_PEM);
|
|
if (in == NULL)
|
|
goto end;
|
|
if (pubgen || key || decrypt) {
|
|
if (!(pail_key = PEM_read_bio_PAILLIER_PrivateKey(in, NULL, NULL, NULL)))
|
|
goto end;
|
|
} else if (pub || encrypt || add || add_plain || sub || mul) {
|
|
if (!(pail_key = PEM_read_bio_PAILLIER_PublicKey(in, NULL, NULL, NULL)))
|
|
goto end;
|
|
}
|
|
|
|
if (encrypt || decrypt || add || add_plain || sub || mul) {
|
|
if (!(ctx = PAILLIER_CTX_new(pail_key, PAILLIER_MAX_THRESHOLD)))
|
|
goto end;
|
|
}
|
|
}
|
|
|
|
if (keygen)
|
|
ret = paillier_keygen(outfile, plain, text);
|
|
else if (pubgen)
|
|
ret = paillier_pubgen(pail_key, outfile, text);
|
|
else if (key || pub)
|
|
ret = paillier_print(pail_key, outfile, text);
|
|
else if (encrypt)
|
|
ret = paillier_encrypt(ctx, plain, outfile, text);
|
|
else if (decrypt)
|
|
ret = paillier_decrypt(ctx, arg1, outfile, text);
|
|
else if (add)
|
|
ret = paillier_add(ctx, arg1, arg2, outfile, text);
|
|
else if (add_plain)
|
|
ret = paillier_add_plain(ctx, arg1, plain, outfile, text);
|
|
else if (sub)
|
|
ret = paillier_sub(ctx, arg1, arg2, outfile, text);
|
|
else if (mul)
|
|
ret = paillier_mul(ctx, arg1, plain, outfile, text);
|
|
|
|
ret = ret ? 0 : 1;
|
|
end:
|
|
PAILLIER_CTX_free(ctx);
|
|
BIO_free_all(in);
|
|
PAILLIER_KEY_free(pail_key);
|
|
if (ret != 0) {
|
|
BIO_printf(bio_err, "May be extra arguments error, please use -help for usage summary.\n");
|
|
ERR_print_errors(bio_err);
|
|
}
|
|
return ret;
|
|
}
|