From 2fd94aae29d53d9859bfc3f53777970def38e253 Mon Sep 17 00:00:00 2001 From: Mattias Andrée Date: Fri, 23 Aug 2024 22:36:41 +0200 Subject: Fixes + add SHA0 and SHA1 using libsha1 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Mattias Andrée --- libhashsum_init_sha0_hasher.c | 69 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 69 insertions(+) create mode 100644 libhashsum_init_sha0_hasher.c (limited to 'libhashsum_init_sha0_hasher.c') diff --git a/libhashsum_init_sha0_hasher.c b/libhashsum_init_sha0_hasher.c new file mode 100644 index 0000000..3ed5744 --- /dev/null +++ b/libhashsum_init_sha0_hasher.c @@ -0,0 +1,69 @@ +/* See LICENSE file for copyright and license details. */ +#include "common.h" + + +LIBHASHSUM_1_NONNULL_ +static size_t +process(struct libhashsum_hasher *this, const void *data, size_t bytes) +{ + const uint8_t *m = data; + int i; + bytes -= bytes & 63U; + if (bytes > SIZE_MAX >> 3) { + for (i = 0; i < 8; i++) { + libsha1_update(&this->state.sha0.s, m, bytes); + m = &m[bytes >> 3]; + } + } else if (bytes) { + libsha1_update(&this->state.sha0.s, m, bytes << 3); + } + return bytes; +} + + +LIBHASHSUM_1_NONNULL_ +static int +finalise_const(struct libhashsum_hasher *this, const void *data, size_t bytes, unsigned extra_bits) +{ + const uint8_t *m = data; + size_t r; + + if (extra_bits > 7U) { + errno = EINVAL; + return -1; + } + + r = process(this, m, bytes); + m = &m[r]; + bytes -= r; + + libsha1_digest(&this->state.sha0.s, data, (bytes << 3) | extra_bits, this->state.sha0.sum); + memset(&this->state.sha0.s, 0, sizeof(this->state.sha0.s)); + this->hash_output = this->state.sha0.sum; + return 0; +} + + +LIBHASHSUM_1_NONNULL_ +static int +finalise(struct libhashsum_hasher *this, void *data, size_t bytes, unsigned extra_bits, size_t size) +{ + (void) size; + return finalise_const(this, data, bytes, extra_bits); +} + + +int +libhashsum_init_sha0_hasher(struct libhashsum_hasher *this) +{ + this->algorithm = LIBHASHSUM_SHA0; + this->input_block_size = 64U; + this->hash_size = sizeof(this->state.sha0.sum); + this->hash_output = NULL; + this->supports_non_whole_bytes = 0; + this->process = &process; + this->finalise_const = &finalise_const; + this->finalise = &finalise; + libsha1_init(&this->state.sha0.s, LIBSHA1_0); + return 0; +} -- cgit v1.2.3-70-g09d2