+++ /dev/null
-/*
- rsagen.c -- RSA key generation and export
- Copyright (C) 2008-2012 Guus Sliepen <guus@tinc-vpn.org>
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License along
- with this program; if not, write to the Free Software Foundation, Inc.,
- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-*/
-
-#include "system.h"
-
-#include <gcrypt.h>
-
-#include "rsagen.h"
-
-#if 0
-// Base64 encoding table
-
-static const char b64e[64] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
-
-// PEM encoding
-
-static bool pem_encode(FILE *fp, const char *header, uint8_t *buf, size_t size) {
- bool decode = false;
- char line[1024];
- uint32_t word = 0;
- int shift = 0;
- size_t i, j = 0;
-
- fprintf(fp, "-----BEGIN %s-----\n", header);
-
- for(i = 0; i < size; i += 3) {
- if(i <= size - 3) {
- word = buf[i] << 16 | buf[i + 1] << 8 | buf[i + 2];
- } else {
- word = buf[i] << 16;
- if(i == size - 2)
- word |= buf[i + 1] << 8;
- }
-
- line[j++] = b64e[(word >> 18) ];
- line[j++] = b64e[(word >> 12) & 0x3f];
- line[j++] = b64e[(word >> 6) & 0x3f];
- line[j++] = b64e[(word ) & 0x3f];
-
- if(j >= 64) {
- line[j++] = '\n';
- line[j] = 0;
- fputs(line, fp);
- j = 0;
- }
- }
-
- if(size % 3 > 0) {
- if(size % 3 > 1)
- line[j++] = '=';
- line[j++] = '=';
- }
-
- if(j) {
- line[j++] = '\n';
- line[j] = 0;
- fputs(line, fp);
- }
-
- fprintf(fp, "-----END %s-----\n", header);
-
- return true;
-}
-
-
-// BER encoding functions
-
-static bool ber_write_id(uint8_t **p, size_t *buflen, int id) {
- if(*buflen <= 0)
- return false;
-
- if(id >= 0x1f) {
- while(id) {
- if(*buflen <= 0)
- return false;
-
- (*buflen)--;
- **p = id & 0x7f;
- id >>= 7;
- if(id)
- **p |= 0x80;
- (*p)++;
- }
- } else {
- (*buflen)--;
- *(*p)++ = id;
- }
-
- return true;
-}
-
-static bool ber_write_len(uint8_t **p, size_t *buflen, size_t len) {
- do {
- if(*buflen <= 0)
- return false;
-
- (*buflen)--;
- **p = len & 0x7f;
- len >>= 7;
- if(len)
- **p |= 0x80;
- (*p)++;
- } while(len);
-
- return true;
-}
-
-static bool ber_write_sequence(uint8_t **p, size_t *buflen, uint8_t *seqbuf, size_t seqlen) {
- if(!ber_write_id(p, buflen, 0x10) || !ber_write_len(p, buflen, seqlen) || *buflen < seqlen)
- return false;
-
- memcpy(*p, seqbuf, seqlen);
- *p += seqlen;
- *buflen -= seqlen;
-
- return true;
-}
-
-static bool ber_write_mpi(uint8_t **p, size_t *buflen, gcry_mpi_t mpi) {
- uint8_t tmpbuf[1024];
- size_t tmplen = sizeof tmpbuf;
- gcry_error_t err;
-
- err = gcry_mpi_aprint(GCRYMPI_FMT_USG, &tmpbuf, &tmplen, mpi);
- if(err)
- return false;
-
- if(!ber_write_id(p, buflen, 0x02) || !ber_write_len(p, buflen, tmplen) || *buflen < tmplen)
- return false;
-
- memcpy(*p, tmpbuf, tmplen);
- *p += tmplen;
- *buflen -= tmplen;
-
- return true;
-}
-
-// Write PEM RSA keys
-
-bool rsa_write_pem_public_key(rsa_t *rsa, FILE *fp) {
- uint8_t derbuf1[8096];
- uint8_t derbuf2[8096];
- uint8_t *derp1 = derbuf1;
- uint8_t *derp2 = derbuf2;
- size_t derlen1 = sizeof derbuf1;
- size_t derlen2 = sizeof derbuf2;
-
- if(!ber_write_mpi(&derp1, &derlen1, &rsa->n)
- || !ber_write_mpi(&derp1, &derlen1, &rsa->e)
- || !ber_write_sequence(&derp2, &derlen2, derbuf1, derlen1)) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Error while encoding RSA public key");
- return false;
- }
-
- if(!pem_encode(fp, "RSA PUBLIC KEY", derbuf2, derlen2)) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Unable to write RSA public key: %s", strerror(errno));
- return false;
- }
-
- return true;
-}
-
-bool rsa_write_pem_private_key(rsa_t *rsa, FILE *fp) {
- uint8_t derbuf1[8096];
- uint8_t derbuf2[8096];
- uint8_t *derp1 = derbuf1;
- uint8_t *derp2 = derbuf2;
- size_t derlen1 = sizeof derbuf1;
- size_t derlen2 = sizeof derbuf2;
-
- if(!ber_write_mpi(&derp1, &derlen1, &bits)
- || ber_write_mpi(&derp1, &derlen1, &rsa->n) // modulus
- || ber_write_mpi(&derp1, &derlen1, &rsa->e) // public exponent
- || ber_write_mpi(&derp1, &derlen1, &rsa->d) // private exponent
- || ber_write_mpi(&derp1, &derlen1, &p)
- || ber_write_mpi(&derp1, &derlen1, &q)
- || ber_write_mpi(&derp1, &derlen1, &exp1)
- || ber_write_mpi(&derp1, &derlen1, &exp2)
- || ber_write_mpi(&derp1, &derlen1, &coeff))
- logger(DEBUG_ALWAYS, LOG_ERR, "Error while encoding RSA private key");
- return false;
- }
-
- if(!pem_encode(fp, "RSA PRIVATE KEY", derbuf2, derlen2)) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Unable to write RSA private key: %s", strerror(errno));
- return false;
- }
-
- return true;
-}
-#endif
-
-bool rsa_write_pem_public_key(rsa_t *rsa, FILE *fp) {
- return false;
-}
-
-bool rsa_write_pem_private_key(rsa_t *rsa, FILE *fp) {
- return false;
-}
-
-bool rsa_generate(rsa_t *rsa, size_t bits, unsigned long exponent) {
- fprintf(stderr, "Generating RSA keys with libgcrypt not implemented yet\n");
- return false;
-}
projects / meshlink / blobdiff