mirror of
https://github.com/Ed94/Odin.git
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zhibog
331 lines
9.3 KiB
Odin
331 lines
9.3 KiB
Odin
package tiger2
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/*
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Copyright 2021 zhibog
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Made available under the BSD-3 license.
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List of contributors:
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zhibog, dotbmp: Initial implementation.
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Jeroen van Rijn: Context design to be able to change from Odin implementation to bindings.
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Interface for the Tiger2 variant of the Tiger hashing algorithm as defined in <https://www.cs.technion.ac.il/~biham/Reports/Tiger/>
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*/
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import "core:os"
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import "core:io"
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import "../_ctx"
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import "../_tiger"
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/*
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Context initialization and switching between the Odin implementation and the bindings
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*/
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USE_BOTAN_LIB :: bool(#config(USE_BOTAN_LIB, false))
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@(private)
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_init_vtable :: #force_inline proc() -> ^_ctx.Hash_Context {
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ctx := _ctx._init_vtable()
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when USE_BOTAN_LIB {
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use_botan()
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} else {
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_assign_hash_vtable(ctx)
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}
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return ctx
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}
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@(private)
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_assign_hash_vtable :: #force_inline proc(ctx: ^_ctx.Hash_Context) {
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ctx.hash_bytes_16 = hash_bytes_odin_16
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ctx.hash_file_16 = hash_file_odin_16
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ctx.hash_stream_16 = hash_stream_odin_16
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ctx.hash_bytes_20 = hash_bytes_odin_20
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ctx.hash_file_20 = hash_file_odin_20
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ctx.hash_stream_20 = hash_stream_odin_20
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ctx.hash_bytes_24 = hash_bytes_odin_24
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ctx.hash_file_24 = hash_file_odin_24
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ctx.hash_stream_24 = hash_stream_odin_24
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ctx.init = _init_odin
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ctx.update = _update_odin
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ctx.final = _final_odin
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}
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_hash_impl := _init_vtable()
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// use_botan does nothing, since Tiger2 is not available in Botan
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@(warning="Tiger2 is not provided by the Botan API. Odin implementation will be used")
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use_botan :: #force_inline proc() {
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use_odin()
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}
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// use_odin assigns the internal vtable of the hash context to use the Odin implementation
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use_odin :: #force_inline proc() {
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_assign_hash_vtable(_hash_impl)
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}
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/*
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High level API
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*/
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// hash_string_128 will hash the given input and return the
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// computed hash
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hash_string_128 :: proc(data: string) -> [16]byte {
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return hash_bytes_128(transmute([]byte)(data))
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}
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// hash_bytes_128 will hash the given input and return the
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// computed hash
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hash_bytes_128 :: proc(data: []byte) -> [16]byte {
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_create_tiger2_ctx(16)
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return _hash_impl->hash_bytes_16(data)
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}
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// hash_stream_128 will read the stream in chunks and compute a
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// hash from its contents
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hash_stream_128 :: proc(s: io.Stream) -> ([16]byte, bool) {
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_create_tiger2_ctx(16)
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return _hash_impl->hash_stream_16(s)
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}
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// hash_file_128 will read the file provided by the given handle
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// and compute a hash
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hash_file_128 :: proc(hd: os.Handle, load_at_once := false) -> ([16]byte, bool) {
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_create_tiger2_ctx(16)
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return _hash_impl->hash_file_16(hd, load_at_once)
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}
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hash_128 :: proc {
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hash_stream_128,
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hash_file_128,
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hash_bytes_128,
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hash_string_128,
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}
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// hash_string_160 will hash the given input and return the
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// computed hash
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hash_string_160 :: proc(data: string) -> [20]byte {
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return hash_bytes_160(transmute([]byte)(data))
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}
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// hash_bytes_160 will hash the given input and return the
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// computed hash
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hash_bytes_160 :: proc(data: []byte) -> [20]byte {
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_create_tiger2_ctx(20)
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return _hash_impl->hash_bytes_20(data)
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}
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// hash_stream_160 will read the stream in chunks and compute a
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// hash from its contents
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hash_stream_160 :: proc(s: io.Stream) -> ([20]byte, bool) {
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_create_tiger2_ctx(20)
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return _hash_impl->hash_stream_20(s)
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}
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// hash_file_160 will read the file provided by the given handle
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// and compute a hash
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hash_file_160 :: proc(hd: os.Handle, load_at_once := false) -> ([20]byte, bool) {
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_create_tiger2_ctx(20)
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return _hash_impl->hash_file_20(hd, load_at_once)
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}
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hash_160 :: proc {
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hash_stream_160,
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hash_file_160,
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hash_bytes_160,
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hash_string_160,
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}
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// hash_string_192 will hash the given input and return the
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// computed hash
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hash_string_192 :: proc(data: string) -> [24]byte {
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return hash_bytes_192(transmute([]byte)(data))
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}
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// hash_bytes_192 will hash the given input and return the
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// computed hash
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hash_bytes_192 :: proc(data: []byte) -> [24]byte {
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_create_tiger2_ctx(24)
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return _hash_impl->hash_bytes_24(data)
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}
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// hash_stream_192 will read the stream in chunks and compute a
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// hash from its contents
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hash_stream_192 :: proc(s: io.Stream) -> ([24]byte, bool) {
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_create_tiger2_ctx(24)
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return _hash_impl->hash_stream_24(s)
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}
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// hash_file_192 will read the file provided by the given handle
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// and compute a hash
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hash_file_192 :: proc(hd: os.Handle, load_at_once := false) -> ([24]byte, bool) {
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_create_tiger2_ctx(24)
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return _hash_impl->hash_file_24(hd, load_at_once)
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}
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hash_192 :: proc {
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hash_stream_192,
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hash_file_192,
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hash_bytes_192,
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hash_string_192,
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}
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hash_bytes_odin_16 :: #force_inline proc(ctx: ^_ctx.Hash_Context, data: []byte) -> [16]byte {
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hash: [16]byte
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if c, ok := ctx.internal_ctx.(_tiger.Tiger_Context); ok {
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_tiger.init_odin(&c)
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_tiger.update_odin(&c, data)
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_tiger.final_odin(&c, hash[:])
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}
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return hash
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}
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hash_stream_odin_16 :: #force_inline proc(ctx: ^_ctx.Hash_Context, fs: io.Stream) -> ([16]byte, bool) {
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hash: [16]byte
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if c, ok := ctx.internal_ctx.(_tiger.Tiger_Context); ok {
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_tiger.init_odin(&c)
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buf := make([]byte, 512)
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defer delete(buf)
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read := 1
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for read > 0 {
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read, _ = fs->impl_read(buf)
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if read > 0 {
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_tiger.update_odin(&c, buf[:read])
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}
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}
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_tiger.final_odin(&c, hash[:])
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return hash, true
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} else {
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return hash, false
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}
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}
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hash_file_odin_16 :: #force_inline proc(ctx: ^_ctx.Hash_Context, hd: os.Handle, load_at_once := false) -> ([16]byte, bool) {
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if !load_at_once {
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return hash_stream_odin_16(ctx, os.stream_from_handle(hd))
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} else {
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if buf, ok := os.read_entire_file(hd); ok {
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return hash_bytes_odin_16(ctx, buf[:]), ok
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}
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}
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return [16]byte{}, false
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}
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hash_bytes_odin_20 :: #force_inline proc(ctx: ^_ctx.Hash_Context, data: []byte) -> [20]byte {
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hash: [20]byte
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if c, ok := ctx.internal_ctx.(_tiger.Tiger_Context); ok {
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_tiger.init_odin(&c)
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_tiger.update_odin(&c, data)
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_tiger.final_odin(&c, hash[:])
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}
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return hash
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}
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hash_stream_odin_20 :: #force_inline proc(ctx: ^_ctx.Hash_Context, fs: io.Stream) -> ([20]byte, bool) {
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hash: [20]byte
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if c, ok := ctx.internal_ctx.(_tiger.Tiger_Context); ok {
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_tiger.init_odin(&c)
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buf := make([]byte, 512)
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defer delete(buf)
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read := 1
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for read > 0 {
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read, _ = fs->impl_read(buf)
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if read > 0 {
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_tiger.update_odin(&c, buf[:read])
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}
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}
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_tiger.final_odin(&c, hash[:])
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return hash, true
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} else {
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return hash, false
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}
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}
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hash_file_odin_20 :: #force_inline proc(ctx: ^_ctx.Hash_Context, hd: os.Handle, load_at_once := false) -> ([20]byte, bool) {
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if !load_at_once {
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return hash_stream_odin_20(ctx, os.stream_from_handle(hd))
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} else {
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if buf, ok := os.read_entire_file(hd); ok {
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return hash_bytes_odin_20(ctx, buf[:]), ok
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}
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}
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return [20]byte{}, false
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}
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hash_bytes_odin_24 :: #force_inline proc(ctx: ^_ctx.Hash_Context, data: []byte) -> [24]byte {
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hash: [24]byte
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if c, ok := ctx.internal_ctx.(_tiger.Tiger_Context); ok {
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_tiger.init_odin(&c)
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_tiger.update_odin(&c, data)
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_tiger.final_odin(&c, hash[:])
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}
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return hash
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}
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hash_stream_odin_24 :: #force_inline proc(ctx: ^_ctx.Hash_Context, fs: io.Stream) -> ([24]byte, bool) {
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hash: [24]byte
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if c, ok := ctx.internal_ctx.(_tiger.Tiger_Context); ok {
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_tiger.init_odin(&c)
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buf := make([]byte, 512)
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defer delete(buf)
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read := 1
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for read > 0 {
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read, _ = fs->impl_read(buf)
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if read > 0 {
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_tiger.update_odin(&c, buf[:read])
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}
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}
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_tiger.final_odin(&c, hash[:])
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return hash, true
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} else {
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return hash, false
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}
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}
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hash_file_odin_24 :: #force_inline proc(ctx: ^_ctx.Hash_Context, hd: os.Handle, load_at_once := false) -> ([24]byte, bool) {
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if !load_at_once {
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return hash_stream_odin_24(ctx, os.stream_from_handle(hd))
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} else {
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if buf, ok := os.read_entire_file(hd); ok {
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return hash_bytes_odin_24(ctx, buf[:]), ok
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}
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}
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return [24]byte{}, false
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}
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@(private)
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_create_tiger2_ctx :: #force_inline proc(hash_size: int) {
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ctx: _tiger.Tiger_Context
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ctx.ver = 2
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_hash_impl.internal_ctx = ctx
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switch hash_size {
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case 16: _hash_impl.hash_size = ._16
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case 20: _hash_impl.hash_size = ._20
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case 24: _hash_impl.hash_size = ._24
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}
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}
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@(private)
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_init_odin :: #force_inline proc(ctx: ^_ctx.Hash_Context) {
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#partial switch ctx.hash_size {
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case ._16: _create_tiger2_ctx(16)
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case ._20: _create_tiger2_ctx(20)
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case ._24: _create_tiger2_ctx(24)
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}
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if c, ok := ctx.internal_ctx.(_tiger.Tiger_Context); ok {
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_tiger.init_odin(&c)
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}
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}
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@(private)
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_update_odin :: #force_inline proc(ctx: ^_ctx.Hash_Context, data: []byte) {
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if c, ok := ctx.internal_ctx.(_tiger.Tiger_Context); ok {
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_tiger.update_odin(&c, data)
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}
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}
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@(private)
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_final_odin :: #force_inline proc(ctx: ^_ctx.Hash_Context, hash: []byte) {
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if c, ok := ctx.internal_ctx.(_tiger.Tiger_Context); ok {
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_tiger.final_odin(&c, hash)
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}
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} |