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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-06-12 03:50:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-06-12 03:50:45 +0000 |
commit | efeb864cb547a2cbf96dc0053a8bdb4d9190b364 (patch) | |
tree | c0b83368f18be983fcc763200c4c24d633244588 /src/basic/sha256.c | |
parent | Releasing progress-linux version 255.5-1~progress7.99u1. (diff) | |
download | systemd-efeb864cb547a2cbf96dc0053a8bdb4d9190b364.tar.xz systemd-efeb864cb547a2cbf96dc0053a8bdb4d9190b364.zip |
Merging upstream version 256.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/basic/sha256.c')
-rw-r--r-- | src/basic/sha256.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/src/basic/sha256.c b/src/basic/sha256.c new file mode 100644 index 0000000..f011695 --- /dev/null +++ b/src/basic/sha256.c @@ -0,0 +1,50 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include <unistd.h> + +#include "hexdecoct.h" +#include "macro.h" +#include "sha256.h" + +int sha256_fd(int fd, uint64_t max_size, uint8_t ret[static SHA256_DIGEST_SIZE]) { + struct sha256_ctx ctx; + uint64_t total_size = 0; + + sha256_init_ctx(&ctx); + + for (;;) { + uint8_t buffer[64 * 1024]; + ssize_t n; + + n = read(fd, buffer, sizeof(buffer)); + if (n < 0) + return -errno; + if (n == 0) + break; + + if (!INC_SAFE(&total_size, n) || total_size > max_size) + return -EFBIG; + + sha256_process_bytes(buffer, n, &ctx); + } + + sha256_finish_ctx(&ctx, ret); + return 0; +} + +int parse_sha256(const char *s, uint8_t ret[static SHA256_DIGEST_SIZE]) { + _cleanup_free_ uint8_t *data = NULL; + size_t size = 0; + int r; + + if (!sha256_is_valid(s)) + return -EINVAL; + + r = unhexmem_full(s, SHA256_DIGEST_SIZE * 2, false, (void**) &data, &size); + if (r < 0) + return r; + assert(size == SHA256_DIGEST_SIZE); + + memcpy(ret, data, size); + return 0; +} |