151 lines
3.4 KiB
C
151 lines
3.4 KiB
C
/*
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* Copyright (c) 2017-2018 Todd C. Miller <Todd.Miller@sudo.ws>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <config.h>
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#include <sys/types.h>
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#include <stdio.h>
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#include <stdlib.h>
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#ifdef HAVE_STRING_H
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# include <string.h>
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#endif /* HAVE_STRING_H */
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#ifdef HAVE_STRINGS_H
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# include <strings.h>
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#endif /* HAVE_STRINGS_H */
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <gcrypt.h>
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#include "sudo_compat.h"
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#include "sudo_debug.h"
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#include "sudo_digest.h"
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struct sudo_digest {
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int gcry_digest_type;
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unsigned int digest_len;
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gcry_md_hd_t ctx;
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};
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/* Map sudo digest type to gcrypt digest type. */
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static int
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sudo_digest_type_to_gcry(int digest_type)
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{
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switch (digest_type) {
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case SUDO_DIGEST_SHA224:
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return GCRY_MD_SHA224;
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break;
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case SUDO_DIGEST_SHA256:
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return GCRY_MD_SHA256;
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break;
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case SUDO_DIGEST_SHA384:
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return GCRY_MD_SHA384;
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break;
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case SUDO_DIGEST_SHA512:
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return GCRY_MD_SHA512;
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break;
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default:
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return -1;
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}
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}
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struct sudo_digest *
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sudo_digest_alloc_v1(int digest_type)
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{
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debug_decl(sudo_digest_alloc, SUDO_DEBUG_UTIL)
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struct sudo_digest *dig;
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int gcry_digest_type;
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gcry_digest_type = sudo_digest_type_to_gcry(digest_type);
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if (gcry_digest_type == -1) {
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errno = EINVAL;
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debug_return_ptr(NULL);
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}
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if ((dig = malloc(sizeof(*dig))) == NULL)
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debug_return_ptr(NULL);
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dig->gcry_digest_type = gcry_digest_type;
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dig->digest_len = gcry_md_get_algo_dlen(gcry_digest_type);
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if (gcry_md_open(&dig->ctx, gcry_digest_type, 0) != 0) {
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free(dig);
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debug_return_ptr(NULL);
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}
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debug_return_ptr(dig);
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}
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void
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sudo_digest_free_v1(struct sudo_digest *dig)
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{
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debug_decl(sudo_digest_free, SUDO_DEBUG_UTIL)
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if (dig != NULL) {
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gcry_md_close(dig->ctx);
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free(dig);
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}
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debug_return;
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}
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void
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sudo_digest_reset_v1(struct sudo_digest *dig)
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{
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debug_decl(sudo_digest_reset, SUDO_DEBUG_UTIL)
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gcry_md_reset(dig->ctx);
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debug_return;
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}
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int
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sudo_digest_getlen_v1(int digest_type)
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{
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debug_decl(sudo_digest_getlen, SUDO_DEBUG_UTIL)
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int gcry_digest_type;
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gcry_digest_type = sudo_digest_type_to_gcry(digest_type);
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if (gcry_digest_type == -1)
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debug_return_int(-1);
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debug_return_int(gcry_md_get_algo_dlen(gcry_digest_type));
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}
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void
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sudo_digest_update_v1(struct sudo_digest *dig, const void *data, size_t len)
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{
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debug_decl(sudo_digest_update, SUDO_DEBUG_UTIL)
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gcry_md_write(dig->ctx, data, len);
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debug_return;
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}
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void
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sudo_digest_final_v1(struct sudo_digest *dig, unsigned char *md)
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{
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debug_decl(sudo_digest_final, SUDO_DEBUG_UTIL)
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gcry_md_final(dig->ctx);
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memcpy(md, gcry_md_read(dig->ctx, 0), dig->digest_len);
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debug_return;
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}
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