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Require CSPRNG in UUID generation where applicable

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This commit is contained in:
Feoramund
2024-06-22 13:21:48 -04:00
parent 3aa232a894
commit fcdba334ea
3 changed files with 21 additions and 3 deletions
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3
core/encoding/uuid/definitions.odin
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@@ -16,6 +16,9 @@ VERSION_7_TIME_SHIFT :: 80
VERSION_7_COUNTER_MASK :: 0x00000000_00000fff_00000000_00000000
VERSION_7_COUNTER_SHIFT :: 64
@(private)
NO_CSPRNG_ERROR :: "The context random generator is not cryptographic. See the documentation for an example of how to set one up."
Read_Error :: enum {
None,
Invalid_Length,

12
core/encoding/uuid/generation.odin
View File

@@ -1,7 +1,7 @@
package uuid
import "base:runtime"
import "core:math/rand"
import "core:mem"
import "core:time"
/*
@@ -33,8 +33,9 @@ generate_v1 :: proc(clock_seq: u16, node: Maybe([6]u8) = nil) -> (result: Identi
if realized_node, ok := node.?; ok {
mutable_node := realized_node
mem.copy_non_overlapping(&result[10], &mutable_node[0], 6)
runtime.mem_copy_non_overlapping(&result[10], &mutable_node[0], 6)
} else {
assert(.Cryptographic in runtime.random_generator_query_info(context.random_generator), NO_CSPRNG_ERROR)
bytes_generated := rand.read(result[10:])
assert(bytes_generated == 6, "RNG failed to generate 6 bytes for UUID v1.")
}
@@ -57,6 +58,7 @@ Returns:
- result: The generated UUID.
*/
generate_v4 :: proc() -> (result: Identifier) {
assert(.Cryptographic in runtime.random_generator_query_info(context.random_generator), NO_CSPRNG_ERROR)
bytes_generated := rand.read(result[:])
assert(bytes_generated == 16, "RNG failed to generate 16 bytes for UUID v4.")
@@ -94,6 +96,7 @@ generate_v6 :: proc(clock_seq: Maybe(u16) = nil, node: Maybe([6]u8) = nil) -> (r
result[8] |= cast(u8)(realized_clock_seq & 0x3F00 >> 8)
result[9] = cast(u8)realized_clock_seq
} else {
assert(.Cryptographic in runtime.random_generator_query_info(context.random_generator), NO_CSPRNG_ERROR)
temporary: [2]u8
bytes_generated := rand.read(temporary[:])
assert(bytes_generated == 2, "RNG failed to generate 2 bytes for UUID v1.")
@@ -103,8 +106,9 @@ generate_v6 :: proc(clock_seq: Maybe(u16) = nil, node: Maybe([6]u8) = nil) -> (r
if realized_node, ok := node.?; ok {
mutable_node := realized_node
mem.copy_non_overlapping(&result[10], &mutable_node[0], 6)
runtime.mem_copy_non_overlapping(&result[10], &mutable_node[0], 6)
} else {
assert(.Cryptographic in runtime.random_generator_query_info(context.random_generator), NO_CSPRNG_ERROR)
bytes_generated := rand.read(result[10:])
assert(bytes_generated == 6, "RNG failed to generate 6 bytes for UUID v1.")
}
@@ -128,6 +132,7 @@ Returns:
- result: The generated UUID.
*/
generate_v7 :: proc() -> (result: Identifier) {
assert(.Cryptographic in runtime.random_generator_query_info(context.random_generator), NO_CSPRNG_ERROR)
unix_time_in_milliseconds := time.to_unix_nanoseconds(time.now()) / 1e6
temporary := cast(u128be)unix_time_in_milliseconds << VERSION_7_TIME_SHIFT
@@ -178,6 +183,7 @@ Returns:
- result: The generated UUID.
*/
generate_v7_counter :: proc(counter: u16) -> (result: Identifier) {
assert(.Cryptographic in runtime.random_generator_query_info(context.random_generator), NO_CSPRNG_ERROR)
assert(counter <= 0x0fff, "This implementation of the version 7 UUID does not support counters in excess of 12 bits (4,095).")
unix_time_in_milliseconds := time.to_unix_nanoseconds(time.now()) / 1e6