diff options
Diffstat (limited to 'third_party/heimdal/lib/hcrypto/pkcs12.c')
| -rw-r--r-- | third_party/heimdal/lib/hcrypto/pkcs12.c | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/third_party/heimdal/lib/hcrypto/pkcs12.c b/third_party/heimdal/lib/hcrypto/pkcs12.c new file mode 100644 index 0000000..5f0791f --- /dev/null +++ b/third_party/heimdal/lib/hcrypto/pkcs12.c @@ -0,0 +1,158 @@ +/* + * Copyright (c) 2006 Kungliga Tekniska Högskolan + * (Royal Institute of Technology, Stockholm, Sweden). + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * 3. Neither the name of the Institute nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <config.h> +#include <roken.h> +#include <assert.h> + +#include <pkcs12.h> +#include <bn.h> + +int +PKCS12_key_gen(const void *key, size_t keylen, + const void *salt, size_t saltlen, + int id, int iteration, size_t outkeysize, + void *out, const EVP_MD *md) +{ + unsigned char *v, *I, hash[EVP_MAX_MD_SIZE]; + unsigned int size, size_I = 0; + unsigned char idc = id; + EVP_MD_CTX *ctx; + unsigned char *outp = out; + int i, vlen; + + /** + * The argument key is pointing to an utf16 string, and thus + * keylen that is no a multiple of 2 is invalid. + */ + if (keylen & 1) + return 0; + + ctx = EVP_MD_CTX_create(); + if (ctx == NULL) + return 0; + + vlen = EVP_MD_block_size(md); + v = malloc(vlen + 1); + if (v == NULL) { + EVP_MD_CTX_destroy(ctx); + return 0; + } + + I = calloc(1, vlen * 2); + if (I == NULL) { + EVP_MD_CTX_destroy(ctx); + free(v); + return 0; + } + + if (salt && saltlen > 0) { + for (i = 0; i < vlen; i++) + I[i] = ((unsigned char*)salt)[i % saltlen]; + size_I += vlen; + } + /* + * There is a diffrence between the no password string and the + * empty string, in the empty string the UTF16 NUL terminator is + * included into the string. + */ + if (key) { + for (i = 0; i < vlen / 2; i++) { + I[(i * 2) + size_I] = 0; + I[(i * 2) + size_I + 1] = ((unsigned char*)key)[i % (keylen + 1)]; + } + size_I += vlen; + } + + while (1) { + BIGNUM *bnB, *bnOne; + + if (!EVP_DigestInit_ex(ctx, md, NULL)) { + EVP_MD_CTX_destroy(ctx); + free(I); + free(v); + return 0; + } + for (i = 0; i < vlen; i++) + EVP_DigestUpdate(ctx, &idc, 1); + EVP_DigestUpdate(ctx, I, size_I); + EVP_DigestFinal_ex(ctx, hash, &size); + + for (i = 1; i < iteration; i++) + EVP_Digest(hash, size, hash, &size, md, NULL); + + memcpy(outp, hash, min(outkeysize, size)); + if (outkeysize < size) + break; + outkeysize -= size; + outp += size; + + for (i = 0; i < vlen; i++) + v[i] = hash[i % size]; + + bnB = BN_bin2bn(v, vlen, NULL); + bnOne = BN_new(); + BN_set_word(bnOne, 1); + + BN_uadd(bnB, bnB, bnOne); + + for (i = 0; i < vlen * 2; i += vlen) { + BIGNUM *bnI; + int j; + + bnI = BN_bin2bn(I + i, vlen, NULL); + + BN_uadd(bnI, bnI, bnB); + + j = BN_num_bytes(bnI); + if (j > vlen) { + assert(j == vlen + 1); + BN_bn2bin(bnI, v); + memcpy(I + i, v + 1, vlen); + } else { + memset(I + i, 0, vlen - j); + BN_bn2bin(bnI, I + i + vlen - j); + } + BN_free(bnI); + } + BN_free(bnB); + BN_free(bnOne); + size_I = vlen * 2; + } + + EVP_MD_CTX_destroy(ctx); + free(I); + free(v); + + return 1; +} |