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Diffstat (limited to '')
| -rw-r--r-- | lib/util/digest.c | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/lib/util/digest.c b/lib/util/digest.c new file mode 100644 index 0000000..b3a3b87 --- /dev/null +++ b/lib/util/digest.c @@ -0,0 +1,172 @@ +/* + * SPDX-License-Identifier: ISC + * + * Copyright (c) 2013-2018 Todd C. Miller <Todd.Miller@sudo.ws> + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +/* + * This is an open source non-commercial project. Dear PVS-Studio, please check it. + * PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com + */ + +#include <config.h> + +#include <stdlib.h> +#if defined(HAVE_STDINT_H) +# include <stdint.h> +#elif defined(HAVE_INTTYPES_H) +# include <inttypes.h> +#endif +#include <unistd.h> +#include <errno.h> + +#include <sudo_compat.h> +#include <sudo_debug.h> +#include <sudo_digest.h> + +#ifdef HAVE_SHA224UPDATE +# include <sha2.h> +#else +# include <compat/sha2.h> +#endif + +static struct digest_function { + const size_t digest_len; + void (*init)(SHA2_CTX *); +#ifdef SHA2_VOID_PTR + void (*update)(SHA2_CTX *, const void *, size_t); + void (*final)(void *, SHA2_CTX *); +#else + void (*update)(SHA2_CTX *, const unsigned char *, size_t); + void (*final)(unsigned char *, SHA2_CTX *); +#endif +} digest_functions[] = { + { + SHA224_DIGEST_LENGTH, + SHA224Init, + SHA224Update, + SHA224Final + }, { + SHA256_DIGEST_LENGTH, + SHA256Init, + SHA256Update, + SHA256Final + }, { + SHA384_DIGEST_LENGTH, + SHA384Init, + SHA384Update, + SHA384Final + }, { + SHA512_DIGEST_LENGTH, + SHA512Init, + SHA512Update, + SHA512Final + }, { + 0 + } +}; + +struct sudo_digest { + struct digest_function *func; + SHA2_CTX ctx; +}; + +struct sudo_digest * +sudo_digest_alloc_v1(unsigned int digest_type) +{ + debug_decl(sudo_digest_alloc, SUDO_DEBUG_UTIL); + struct digest_function *func = NULL; + struct sudo_digest *dig; + unsigned int i; + + for (i = 0; digest_functions[i].digest_len != 0; i++) { + if (digest_type == i) { + func = &digest_functions[i]; + break; + } + } + if (func == NULL) { + errno = EINVAL; + debug_return_ptr(NULL); + } + + if ((dig = malloc(sizeof(*dig))) == NULL) + debug_return_ptr(NULL); + func->init(&dig->ctx); + dig->func = func; + + debug_return_ptr(dig); +} + +void +sudo_digest_free_v1(struct sudo_digest *dig) +{ + debug_decl(sudo_digest_free, SUDO_DEBUG_UTIL); + + free(dig); + + debug_return; +} + +void +sudo_digest_reset_v1(struct sudo_digest *dig) +{ + debug_decl(sudo_digest_reset, SUDO_DEBUG_UTIL); + + dig->func->init(&dig->ctx); + + debug_return; +} + +size_t +sudo_digest_getlen_v2(unsigned int digest_type) +{ + debug_decl(sudo_digest_getlen, SUDO_DEBUG_UTIL); + unsigned int i; + + for (i = 0; digest_functions[i].digest_len != 0; i++) { + if (digest_type == i) + debug_return_size_t(digest_functions[i].digest_len); + } + + debug_return_size_t(0); +} + +int +sudo_digest_getlen_v1(unsigned int digest_type) +{ + size_t len = sudo_digest_getlen_v2(digest_type); + return len ? (int)len : -1; +} + +void +sudo_digest_update_v1(struct sudo_digest *dig, const void *data, size_t len) +{ + debug_decl(sudo_digest_update, SUDO_DEBUG_UTIL); + + dig->func->update(&dig->ctx, data, len); + + debug_return; +} + +void +sudo_digest_final_v1(struct sudo_digest *dig, unsigned char *md) +{ + debug_decl(sudo_digest_final, SUDO_DEBUG_UTIL); + + dig->func->final(md, &dig->ctx); + + debug_return; +} |