mirror of
https://github.com/Ed94/Odin.git
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core:crypto/hash: Add a generic higher level hash interface
There is a lot of code duplicated in convenience methods in each hash implementation, and having a generic hash type makes implementing higher-level constructs such as HMAC significantly easier down the road.
This commit is contained in:
Yawning Angel
+33
-398
@@ -12,13 +12,8 @@ package sha2
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*/
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import "core:encoding/endian"
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import "core:io"
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import "core:math/bits"
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import "core:os"
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/*
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High level API
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*/
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import "core:mem"
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DIGEST_SIZE_224 :: 28
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DIGEST_SIZE_256 :: 32
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@@ -26,411 +21,33 @@ DIGEST_SIZE_384 :: 48
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DIGEST_SIZE_512 :: 64
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DIGEST_SIZE_512_256 :: 32
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// hash_string_224 will hash the given input and return the
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// computed hash
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hash_string_224 :: proc(data: string) -> [DIGEST_SIZE_224]byte {
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return hash_bytes_224(transmute([]byte)(data))
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}
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// hash_bytes_224 will hash the given input and return the
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// computed hash
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hash_bytes_224 :: proc(data: []byte) -> [DIGEST_SIZE_224]byte {
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hash: [DIGEST_SIZE_224]byte
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ctx: Context_256
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init_224 :: proc(ctx: ^Context_256) {
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ctx.md_bits = 224
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init(&ctx)
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update(&ctx, data)
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final(&ctx, hash[:])
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return hash
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_init(ctx)
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}
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// hash_string_to_buffer_224 will hash the given input and assign the
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// computed hash to the second parameter.
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// It requires that the destination buffer is at least as big as the digest size
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hash_string_to_buffer_224 :: proc(data: string, hash: []byte) {
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hash_bytes_to_buffer_224(transmute([]byte)(data), hash)
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}
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// hash_bytes_to_buffer_224 will hash the given input and write the
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// computed hash into the second parameter.
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// It requires that the destination buffer is at least as big as the digest size
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hash_bytes_to_buffer_224 :: proc(data, hash: []byte) {
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ctx: Context_256
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ctx.md_bits = 224
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init(&ctx)
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update(&ctx, data)
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final(&ctx, hash)
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}
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// hash_stream_224 will read the stream in chunks and compute a
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// hash from its contents
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hash_stream_224 :: proc(s: io.Stream) -> ([DIGEST_SIZE_224]byte, bool) {
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hash: [DIGEST_SIZE_224]byte
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ctx: Context_256
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ctx.md_bits = 224
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init(&ctx)
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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, _ = io.read(s, buf)
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if read > 0 {
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update(&ctx, buf[:read])
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}
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}
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final(&ctx, hash[:])
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return hash, true
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}
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// hash_file_224 will read the file provided by the given handle
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// and compute a hash
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hash_file_224 :: proc(hd: os.Handle, load_at_once := false) -> ([DIGEST_SIZE_224]byte, bool) {
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if !load_at_once {
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return hash_stream_224(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_224(buf[:]), ok
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}
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}
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return [DIGEST_SIZE_224]byte{}, false
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}
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hash_224 :: proc {
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hash_stream_224,
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hash_file_224,
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hash_bytes_224,
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hash_string_224,
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hash_bytes_to_buffer_224,
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hash_string_to_buffer_224,
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}
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// hash_string_256 will hash the given input and return the
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// computed hash
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hash_string_256 :: proc(data: string) -> [DIGEST_SIZE_256]byte {
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return hash_bytes_256(transmute([]byte)(data))
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}
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// hash_bytes_256 will hash the given input and return the
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// computed hash
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hash_bytes_256 :: proc(data: []byte) -> [DIGEST_SIZE_256]byte {
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hash: [DIGEST_SIZE_256]byte
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ctx: Context_256
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init_256 :: proc(ctx: ^Context_256) {
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ctx.md_bits = 256
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init(&ctx)
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update(&ctx, data)
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final(&ctx, hash[:])
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return hash
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_init(ctx)
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}
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// hash_string_to_buffer_256 will hash the given input and assign the
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// computed hash to the second parameter.
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// It requires that the destination buffer is at least as big as the digest size
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hash_string_to_buffer_256 :: proc(data: string, hash: []byte) {
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hash_bytes_to_buffer_256(transmute([]byte)(data), hash)
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}
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// hash_bytes_to_buffer_256 will hash the given input and write the
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// computed hash into the second parameter.
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// It requires that the destination buffer is at least as big as the digest size
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hash_bytes_to_buffer_256 :: proc(data, hash: []byte) {
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ctx: Context_256
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ctx.md_bits = 256
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init(&ctx)
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update(&ctx, data)
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final(&ctx, hash)
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}
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// hash_stream_256 will read the stream in chunks and compute a
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// hash from its contents
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hash_stream_256 :: proc(s: io.Stream) -> ([DIGEST_SIZE_256]byte, bool) {
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hash: [DIGEST_SIZE_256]byte
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ctx: Context_256
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ctx.md_bits = 256
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init(&ctx)
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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, _ = io.read(s, buf)
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if read > 0 {
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update(&ctx, buf[:read])
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}
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}
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final(&ctx, hash[:])
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return hash, true
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}
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// hash_file_256 will read the file provided by the given handle
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// and compute a hash
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hash_file_256 :: proc(hd: os.Handle, load_at_once := false) -> ([DIGEST_SIZE_256]byte, bool) {
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if !load_at_once {
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return hash_stream_256(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_256(buf[:]), ok
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}
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}
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return [DIGEST_SIZE_256]byte{}, false
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}
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hash_256 :: proc {
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hash_stream_256,
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hash_file_256,
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hash_bytes_256,
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hash_string_256,
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hash_bytes_to_buffer_256,
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hash_string_to_buffer_256,
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}
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// hash_string_384 will hash the given input and return the
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// computed hash
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hash_string_384 :: proc(data: string) -> [DIGEST_SIZE_384]byte {
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return hash_bytes_384(transmute([]byte)(data))
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}
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// hash_bytes_384 will hash the given input and return the
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// computed hash
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hash_bytes_384 :: proc(data: []byte) -> [DIGEST_SIZE_384]byte {
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hash: [DIGEST_SIZE_384]byte
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ctx: Context_512
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init_384 :: proc(ctx: ^Context_512) {
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ctx.md_bits = 384
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init(&ctx)
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update(&ctx, data)
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final(&ctx, hash[:])
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return hash
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_init(ctx)
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}
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// hash_string_to_buffer_384 will hash the given input and assign the
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// computed hash to the second parameter.
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// It requires that the destination buffer is at least as big as the digest size
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hash_string_to_buffer_384 :: proc(data: string, hash: []byte) {
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hash_bytes_to_buffer_384(transmute([]byte)(data), hash)
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}
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// hash_bytes_to_buffer_384 will hash the given input and write the
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// computed hash into the second parameter.
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// It requires that the destination buffer is at least as big as the digest size
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hash_bytes_to_buffer_384 :: proc(data, hash: []byte) {
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ctx: Context_512
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ctx.md_bits = 384
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init(&ctx)
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update(&ctx, data)
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final(&ctx, hash)
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}
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// hash_stream_384 will read the stream in chunks and compute a
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// hash from its contents
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hash_stream_384 :: proc(s: io.Stream) -> ([DIGEST_SIZE_384]byte, bool) {
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hash: [DIGEST_SIZE_384]byte
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ctx: Context_512
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ctx.md_bits = 384
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init(&ctx)
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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, _ = io.read(s, buf)
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if read > 0 {
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update(&ctx, buf[:read])
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}
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}
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final(&ctx, hash[:])
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return hash, true
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}
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// hash_file_384 will read the file provided by the given handle
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// and compute a hash
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hash_file_384 :: proc(hd: os.Handle, load_at_once := false) -> ([DIGEST_SIZE_384]byte, bool) {
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if !load_at_once {
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return hash_stream_384(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_384(buf[:]), ok
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}
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}
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return [DIGEST_SIZE_384]byte{}, false
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}
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hash_384 :: proc {
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hash_stream_384,
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hash_file_384,
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hash_bytes_384,
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hash_string_384,
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hash_bytes_to_buffer_384,
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hash_string_to_buffer_384,
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}
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// hash_string_512 will hash the given input and return the
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// computed hash
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hash_string_512 :: proc(data: string) -> [DIGEST_SIZE_512]byte {
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return hash_bytes_512(transmute([]byte)(data))
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}
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// hash_bytes_512 will hash the given input and return the
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// computed hash
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hash_bytes_512 :: proc(data: []byte) -> [DIGEST_SIZE_512]byte {
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hash: [DIGEST_SIZE_512]byte
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ctx: Context_512
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init_512 :: proc(ctx: ^Context_512) {
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ctx.md_bits = 512
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init(&ctx)
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update(&ctx, data)
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final(&ctx, hash[:])
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return hash
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_init(ctx)
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}
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// hash_string_to_buffer_512 will hash the given input and assign the
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// computed hash to the second parameter.
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// It requires that the destination buffer is at least as big as the digest size
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hash_string_to_buffer_512 :: proc(data: string, hash: []byte) {
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hash_bytes_to_buffer_512(transmute([]byte)(data), hash)
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}
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// hash_bytes_to_buffer_512 will hash the given input and write the
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// computed hash into the second parameter.
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// It requires that the destination buffer is at least as big as the digest size
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hash_bytes_to_buffer_512 :: proc(data, hash: []byte) {
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ctx: Context_512
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ctx.md_bits = 512
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init(&ctx)
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update(&ctx, data)
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final(&ctx, hash)
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}
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// hash_stream_512 will read the stream in chunks and compute a
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// hash from its contents
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hash_stream_512 :: proc(s: io.Stream) -> ([DIGEST_SIZE_512]byte, bool) {
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hash: [DIGEST_SIZE_512]byte
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ctx: Context_512
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ctx.md_bits = 512
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init(&ctx)
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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, _ = io.read(s, buf)
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if read > 0 {
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update(&ctx, buf[:read])
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}
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}
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final(&ctx, hash[:])
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return hash, true
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}
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// hash_file_512 will read the file provided by the given handle
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// and compute a hash
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hash_file_512 :: proc(hd: os.Handle, load_at_once := false) -> ([DIGEST_SIZE_512]byte, bool) {
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if !load_at_once {
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return hash_stream_512(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_512(buf[:]), ok
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}
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}
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return [DIGEST_SIZE_512]byte{}, false
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}
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hash_512 :: proc {
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hash_stream_512,
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hash_file_512,
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hash_bytes_512,
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hash_string_512,
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hash_bytes_to_buffer_512,
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hash_string_to_buffer_512,
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}
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// hash_string_512_256 will hash the given input and return the
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// computed hash
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hash_string_512_256 :: proc(data: string) -> [DIGEST_SIZE_512_256]byte {
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return hash_bytes_512_256(transmute([]byte)(data))
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}
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// hash_bytes_512_256 will hash the given input and return the
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// computed hash
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hash_bytes_512_256 :: proc(data: []byte) -> [DIGEST_SIZE_512_256]byte {
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hash: [DIGEST_SIZE_512_256]byte
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ctx: Context_512
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init_512_256 :: proc(ctx: ^Context_512) {
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ctx.md_bits = 256
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init(&ctx)
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update(&ctx, data)
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final(&ctx, hash[:])
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return hash
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_init(ctx)
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}
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// hash_string_to_buffer_512_256 will hash the given input and assign the
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// computed hash to the second parameter.
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// It requires that the destination buffer is at least as big as the digest size
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hash_string_to_buffer_512_256 :: proc(data: string, hash: []byte) {
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hash_bytes_to_buffer_512_256(transmute([]byte)(data), hash)
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}
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// hash_bytes_to_buffer_512_256 will hash the given input and write the
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// computed hash into the second parameter.
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// It requires that the destination buffer is at least as big as the digest size
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hash_bytes_to_buffer_512_256 :: proc(data, hash: []byte) {
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ctx: Context_512
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ctx.md_bits = 256
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init(&ctx)
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update(&ctx, data)
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final(&ctx, hash)
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}
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// hash_stream_512_256 will read the stream in chunks and compute a
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// hash from its contents
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hash_stream_512_256 :: proc(s: io.Stream) -> ([DIGEST_SIZE_512_256]byte, bool) {
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hash: [DIGEST_SIZE_512_256]byte
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ctx: Context_512
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ctx.md_bits = 256
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init(&ctx)
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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, _ = io.read(s, buf)
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if read > 0 {
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update(&ctx, buf[:read])
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}
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}
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final(&ctx, hash[:])
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return hash, true
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}
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// hash_file_512_256 will read the file provided by the given handle
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// and compute a hash
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hash_file_512_256 :: proc(hd: os.Handle, load_at_once := false) -> ([DIGEST_SIZE_512_256]byte, bool) {
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if !load_at_once {
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return hash_stream_512_256(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_512_256(buf[:]), ok
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}
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}
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return [DIGEST_SIZE_512_256]byte{}, false
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}
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hash_512_256 :: proc {
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hash_stream_512_256,
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hash_file_512_256,
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hash_bytes_512_256,
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hash_string_512_256,
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hash_bytes_to_buffer_512_256,
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hash_string_to_buffer_512_256,
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}
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/*
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Low level API
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*/
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init :: proc(ctx: ^$T) {
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@(private)
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_init :: proc(ctx: ^$T) {
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when T == Context_256 {
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switch ctx.md_bits {
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case 224:
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@@ -528,13 +145,21 @@ update :: proc(ctx: ^$T, data: []byte) {
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}
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}
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final :: proc(ctx: ^$T, hash: []byte) {
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final :: proc(ctx: ^$T, hash: []byte, finalize_clone: bool = false) {
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assert(ctx.is_initialized)
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if len(hash) * 8 < ctx.md_bits {
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panic("crypto/sha2: invalid destination digest size")
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}
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ctx := ctx
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if finalize_clone {
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tmp_ctx: T
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clone(&tmp_ctx, ctx)
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ctx = &tmp_ctx
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}
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defer(reset(ctx))
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length := ctx.length
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raw_pad: [SHA512_BLOCK_SIZE]byte
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@@ -576,8 +201,18 @@ final :: proc(ctx: ^$T, hash: []byte) {
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endian.unchecked_put_u64be(hash[i * 8:], ctx.h[i])
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}
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}
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}
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ctx.is_initialized = false
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clone :: proc(ctx, other: ^$T) {
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ctx^ = other^
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}
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reset :: proc(ctx: ^$T) {
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if !ctx.is_initialized {
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return
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}
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mem.zero_explicit(ctx, size_of(ctx^))
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}
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/*
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Reference in New Issue
Block a user