161 lines
3.9 KiB
C
161 lines
3.9 KiB
C
/*
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* Copyright (c) 2013-2018 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 <openssl/sha.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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union ANY_CTX {
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SHA256_CTX sha256;
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SHA512_CTX sha512;
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};
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static struct digest_function {
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const unsigned int digest_len;
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int (*init)(union ANY_CTX *);
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int (*update)(union ANY_CTX *, const void *, size_t);
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int (*final)(unsigned char *, union ANY_CTX *);
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} digest_functions[] = {
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{
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SHA224_DIGEST_LENGTH,
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(int (*)(union ANY_CTX *))SHA224_Init,
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(int (*)(union ANY_CTX *, const void *, size_t))SHA224_Update,
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(int (*)(unsigned char *, union ANY_CTX *))SHA224_Final
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}, {
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SHA256_DIGEST_LENGTH,
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(int (*)(union ANY_CTX *))SHA256_Init,
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(int (*)(union ANY_CTX *, const void *, size_t))SHA256_Update,
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(int (*)(unsigned char *, union ANY_CTX *))SHA256_Final
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}, {
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SHA384_DIGEST_LENGTH,
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(int (*)(union ANY_CTX *))SHA384_Init,
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(int (*)(union ANY_CTX *, const void *, size_t))SHA384_Update,
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(int (*)(unsigned char *, union ANY_CTX *))SHA384_Final
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}, {
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SHA512_DIGEST_LENGTH,
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(int (*)(union ANY_CTX *))SHA512_Init,
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(int (*)(union ANY_CTX *, const void *, size_t))SHA512_Update,
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(int (*)(unsigned char *, union ANY_CTX *))SHA512_Final
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}, {
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0
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}
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};
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struct sudo_digest {
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struct digest_function *func;
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union ANY_CTX ctx;
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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 digest_function *func = NULL;
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struct sudo_digest *dig;
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int i;
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for (i = 0; digest_functions[i].digest_len != 0; i++) {
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if (digest_type == i) {
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func = &digest_functions[i];
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break;
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}
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}
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if (func == NULL) {
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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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func->init(&dig->ctx);
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dig->func = func;
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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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free(dig);
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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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dig->func->init(&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 i;
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for (i = 0; digest_functions[i].digest_len != 0; i++) {
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if (digest_type == i)
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debug_return_int(digest_functions[i].digest_len);
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}
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debug_return_int(-1);
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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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dig->func->update(&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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dig->func->final(md, &dig->ctx);
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debug_return;
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}
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