Extended crypto API by variants that write the result into a destination buffer, instead of returning it

This commit is contained in:
zhibog
2021-12-31 13:16:11 +01:00
parent c7ff296bef
commit 42033ea808
38 changed files with 2690 additions and 662 deletions
+88 -21
View File
@@ -20,16 +20,20 @@ import botan "../bindings"
High level API
*/
DIGEST_SIZE_128 :: 16
DIGEST_SIZE_160 :: 20
DIGEST_SIZE_192 :: 24
// hash_string_128 will hash the given input and return the
// computed hash
hash_string_128 :: proc(data: string) -> [16]byte {
hash_string_128 :: proc(data: string) -> [DIGEST_SIZE_128]byte {
return hash_bytes_128(transmute([]byte)(data))
}
// hash_bytes_128 will hash the given input and return the
// computed hash
hash_bytes_128 :: proc(data: []byte) -> [16]byte {
hash: [16]byte
hash_bytes_128 :: proc(data: []byte) -> [DIGEST_SIZE_128]byte {
hash: [DIGEST_SIZE_128]byte
ctx: botan.hash_t
botan.hash_init(&ctx, botan.HASH_TIGER_128, 0)
botan.hash_update(ctx, len(data) == 0 ? nil : &data[0], uint(len(data)))
@@ -38,10 +42,29 @@ hash_bytes_128 :: proc(data: []byte) -> [16]byte {
return hash
}
// hash_string_to_buffer_128 will hash the given input and assign the
// computed hash to the second parameter.
// It requires that the destination buffer is at least as big as the digest size
hash_string_to_buffer_128 :: proc(data: string, hash: []byte) {
hash_bytes_to_buffer_128(transmute([]byte)(data), hash);
}
// hash_bytes_to_buffer_128 will hash the given input and write the
// computed hash into the second parameter.
// It requires that the destination buffer is at least as big as the digest size
hash_bytes_to_buffer_128 :: proc(data, hash: []byte) {
assert(len(hash) >= DIGEST_SIZE_128, "Size of destination buffer is smaller than the digest size")
ctx: botan.hash_t
botan.hash_init(&ctx, botan.HASH_TIGER_128, 0)
botan.hash_update(ctx, len(data) == 0 ? nil : &data[0], uint(len(data)))
botan.hash_final(ctx, &hash[0])
botan.hash_destroy(ctx)
}
// hash_stream_128 will read the stream in chunks and compute a
// hash from its contents
hash_stream_128 :: proc(s: io.Stream) -> ([16]byte, bool) {
hash: [16]byte
hash_stream_128 :: proc(s: io.Stream) -> ([DIGEST_SIZE_128]byte, bool) {
hash: [DIGEST_SIZE_128]byte
ctx: botan.hash_t
botan.hash_init(&ctx, botan.HASH_TIGER_128, 0)
buf := make([]byte, 512)
@@ -60,7 +83,7 @@ hash_stream_128 :: proc(s: io.Stream) -> ([16]byte, bool) {
// hash_file_128 will read the file provided by the given handle
// and compute a hash
hash_file_128 :: proc(hd: os.Handle, load_at_once := false) -> ([16]byte, bool) {
hash_file_128 :: proc(hd: os.Handle, load_at_once := false) -> ([DIGEST_SIZE_128]byte, bool) {
if !load_at_once {
return hash_stream_128(os.stream_from_handle(hd))
} else {
@@ -68,7 +91,7 @@ hash_file_128 :: proc(hd: os.Handle, load_at_once := false) -> ([16]byte, bool)
return hash_bytes_128(buf[:]), ok
}
}
return [16]byte{}, false
return [DIGEST_SIZE_128]byte{}, false
}
hash_128 :: proc {
@@ -76,18 +99,20 @@ hash_128 :: proc {
hash_file_128,
hash_bytes_128,
hash_string_128,
hash_bytes_to_buffer_128,
hash_string_to_buffer_128,
}
// hash_string_160 will hash the given input and return the
// computed hash
hash_string_160 :: proc(data: string) -> [20]byte {
hash_string_160 :: proc(data: string) -> [DIGEST_SIZE_160]byte {
return hash_bytes_160(transmute([]byte)(data))
}
// hash_bytes_160 will hash the given input and return the
// computed hash
hash_bytes_160 :: proc(data: []byte) -> [20]byte {
hash: [20]byte
hash_bytes_160 :: proc(data: []byte) -> [DIGEST_SIZE_160]byte {
hash: [DIGEST_SIZE_160]byte
ctx: botan.hash_t
botan.hash_init(&ctx, botan.HASH_TIGER_160, 0)
botan.hash_update(ctx, len(data) == 0 ? nil : &data[0], uint(len(data)))
@@ -96,10 +121,29 @@ hash_bytes_160 :: proc(data: []byte) -> [20]byte {
return hash
}
// hash_string_to_buffer_160 will hash the given input and assign the
// computed hash to the second parameter.
// It requires that the destination buffer is at least as big as the digest size
hash_string_to_buffer_160 :: proc(data: string, hash: []byte) {
hash_bytes_to_buffer_160(transmute([]byte)(data), hash);
}
// hash_bytes_to_buffer_160 will hash the given input and write the
// computed hash into the second parameter.
// It requires that the destination buffer is at least as big as the digest size
hash_bytes_to_buffer_160 :: proc(data, hash: []byte) {
assert(len(hash) >= DIGEST_SIZE_160, "Size of destination buffer is smaller than the digest size")
ctx: botan.hash_t
botan.hash_init(&ctx, botan.HASH_TIGER_160, 0)
botan.hash_update(ctx, len(data) == 0 ? nil : &data[0], uint(len(data)))
botan.hash_final(ctx, &hash[0])
botan.hash_destroy(ctx)
}
// hash_stream_160 will read the stream in chunks and compute a
// hash from its contents
hash_stream_160 :: proc(s: io.Stream) -> ([20]byte, bool) {
hash: [20]byte
hash_stream_160 :: proc(s: io.Stream) -> ([DIGEST_SIZE_160]byte, bool) {
hash: [DIGEST_SIZE_160]byte
ctx: botan.hash_t
botan.hash_init(&ctx, botan.HASH_TIGER_160, 0)
buf := make([]byte, 512)
@@ -118,7 +162,7 @@ hash_stream_160 :: proc(s: io.Stream) -> ([20]byte, bool) {
// hash_file_160 will read the file provided by the given handle
// and compute a hash
hash_file_160 :: proc(hd: os.Handle, load_at_once := false) -> ([20]byte, bool) {
hash_file_160 :: proc(hd: os.Handle, load_at_once := false) -> ([DIGEST_SIZE_160]byte, bool) {
if !load_at_once {
return hash_stream_160(os.stream_from_handle(hd))
} else {
@@ -126,7 +170,7 @@ hash_file_160 :: proc(hd: os.Handle, load_at_once := false) -> ([20]byte, bool)
return hash_bytes_160(buf[:]), ok
}
}
return [20]byte{}, false
return [DIGEST_SIZE_160]byte{}, false
}
hash_160 :: proc {
@@ -134,18 +178,20 @@ hash_160 :: proc {
hash_file_160,
hash_bytes_160,
hash_string_160,
hash_bytes_to_buffer_160,
hash_string_to_buffer_160,
}
// hash_string_192 will hash the given input and return the
// computed hash
hash_string_192 :: proc(data: string) -> [24]byte {
hash_string_192 :: proc(data: string) -> [DIGEST_SIZE_192]byte {
return hash_bytes_192(transmute([]byte)(data))
}
// hash_bytes_192 will hash the given input and return the
// computed hash
hash_bytes_192 :: proc(data: []byte) -> [24]byte {
hash: [24]byte
hash_bytes_192 :: proc(data: []byte) -> [DIGEST_SIZE_192]byte {
hash: [DIGEST_SIZE_192]byte
ctx: botan.hash_t
botan.hash_init(&ctx, botan.HASH_TIGER_192, 0)
botan.hash_update(ctx, len(data) == 0 ? nil : &data[0], uint(len(data)))
@@ -154,10 +200,29 @@ hash_bytes_192 :: proc(data: []byte) -> [24]byte {
return hash
}
// hash_string_to_buffer_192 will hash the given input and assign the
// computed hash to the second parameter.
// It requires that the destination buffer is at least as big as the digest size
hash_string_to_buffer_192 :: proc(data: string, hash: []byte) {
hash_bytes_to_buffer_192(transmute([]byte)(data), hash);
}
// hash_bytes_to_buffer_192 will hash the given input and write the
// computed hash into the second parameter.
// It requires that the destination buffer is at least as big as the digest size
hash_bytes_to_buffer_192 :: proc(data, hash: []byte) {
assert(len(hash) >= DIGEST_SIZE_192, "Size of destination buffer is smaller than the digest size")
ctx: botan.hash_t
botan.hash_init(&ctx, botan.HASH_TIGER_192, 0)
botan.hash_update(ctx, len(data) == 0 ? nil : &data[0], uint(len(data)))
botan.hash_final(ctx, &hash[0])
botan.hash_destroy(ctx)
}
// hash_stream_192 will read the stream in chunks and compute a
// hash from its contents
hash_stream_192 :: proc(s: io.Stream) -> ([24]byte, bool) {
hash: [24]byte
hash_stream_192 :: proc(s: io.Stream) -> ([DIGEST_SIZE_192]byte, bool) {
hash: [DIGEST_SIZE_192]byte
ctx: botan.hash_t
botan.hash_init(&ctx, botan.HASH_TIGER_192, 0)
buf := make([]byte, 512)
@@ -176,7 +241,7 @@ hash_stream_192 :: proc(s: io.Stream) -> ([24]byte, bool) {
// hash_file_192 will read the file provided by the given handle
// and compute a hash
hash_file_192 :: proc(hd: os.Handle, load_at_once := false) -> ([24]byte, bool) {
hash_file_192 :: proc(hd: os.Handle, load_at_once := false) -> ([DIGEST_SIZE_192]byte, bool) {
if !load_at_once {
return hash_stream_192(os.stream_from_handle(hd))
} else {
@@ -184,7 +249,7 @@ hash_file_192 :: proc(hd: os.Handle, load_at_once := false) -> ([24]byte, bool)
return hash_bytes_192(buf[:]), ok
}
}
return [24]byte{}, false
return [DIGEST_SIZE_192]byte{}, false
}
hash_192 :: proc {
@@ -192,6 +257,8 @@ hash_192 :: proc {
hash_file_192,
hash_bytes_192,
hash_string_192,
hash_bytes_to_buffer_192,
hash_string_to_buffer_192,
}
/*