x0x 0.14.4

use std::path::Path;

use saorsa_pqc::api::sig::{ml_dsa_65, MlDsaPublicKey, MlDsaSignature, MlDsaVariant};
use tracing::debug;

/// Domain separation context for x0x release signatures.
/// Distinct from saorsa-node's `b"saorsa-node-release-v1"`.
pub const SIGNING_CONTEXT: &[u8] = b"x0x-release-v1";

/// ML-DSA-65 public key size in bytes.
pub const PUBLIC_KEY_SIZE: usize = 1952;

/// ML-DSA-65 signature size in bytes.
pub const SIGNATURE_SIZE: usize = 3309;

/// Embedded ML-DSA-65 release signing public key (1952 bytes).
/// Generated by: x0x-keygen embed-rust --key /Users/davidirvine/.x0x/release-signing-key.pub
pub const RELEASE_SIGNING_KEY: &[u8; 1952] = &[
    0x2b, 0x21, 0xd6, 0xfe, 0xf8, 0xc2, 0xba, 0x8c, 0x8c, 0x72, 0x07, 0x93, 0x70, 0x96, 0xac, 0xc3,
    0x01, 0x44, 0x8e, 0x0b, 0x9b, 0xe1, 0xf4, 0x75, 0xb1, 0x04, 0x87, 0xd2, 0x02, 0xcf, 0xb4, 0xd6,
    0x74, 0xc0, 0xa4, 0x5c, 0xca, 0x90, 0x62, 0xec, 0xf4, 0x15, 0x84, 0xed, 0x48, 0x2c, 0x15, 0x38,
    0x3b, 0x94, 0x75, 0xe8, 0xea, 0x11, 0x7b, 0x8d, 0xf3, 0xfc, 0xa9, 0x43, 0xb8, 0x91, 0xb2, 0x37,
    0xb9, 0x2e, 0xcd, 0x5f, 0xbc, 0xc2, 0x94, 0x9f, 0xdb, 0x9a, 0xa7, 0x3a, 0x99, 0x5e, 0xbd, 0x0a,
    0x93, 0xf0, 0x5b, 0xd6, 0xaf, 0x95, 0xfa, 0xc7, 0xd1, 0x1d, 0xfa, 0x05, 0x9f, 0xff, 0x9b, 0xc7,
    0xe0, 0x28, 0x9f, 0x43, 0xff, 0x54, 0xa7, 0x40, 0xa6, 0x95, 0x77, 0xf7, 0xb5, 0x24, 0xa6, 0x45,
    0xf3, 0xbb, 0xef, 0x39, 0x0f, 0x9c, 0xfd, 0xc2, 0x73, 0xe9, 0x65, 0xf5, 0x29, 0xbc, 0xa7, 0x21,
    0x4b, 0x7c, 0x05, 0x07, 0xa6, 0x96, 0x98, 0x36, 0x9b, 0x74, 0xc0, 0x2e, 0x8c, 0x60, 0x57, 0x58,
    0xf2, 0x17, 0x76, 0xd1, 0x5f, 0xf4, 0x04, 0x76, 0xb3, 0x2e, 0x31, 0xf5, 0xa9, 0xc3, 0xdb, 0x62,
    0x38, 0x0e, 0x67, 0xf2, 0x8f, 0x2d, 0x0b, 0x9f, 0x40, 0xec, 0x8b, 0x14, 0xd0, 0xba, 0x8a, 0x94,
    0x48, 0xcf, 0x40, 0x0a, 0x5c, 0xcb, 0x37, 0x0c, 0x17, 0x7e, 0x53, 0x80, 0x75, 0x54, 0x26, 0x6d,
    0x20, 0xe8, 0x7e, 0x71, 0xe3, 0xf0, 0xf4, 0x2c, 0x13, 0x60, 0x0c, 0xe1, 0xf7, 0x02, 0xb3, 0xb7,
    0x42, 0x36, 0x57, 0x54, 0x89, 0xcd, 0xf7, 0x19, 0xa6, 0x39, 0x3c, 0x99, 0x99, 0x00, 0xe8, 0x60,
    0x7b, 0xcf, 0xb4, 0x08, 0xa0, 0x28, 0xbe, 0x3f, 0x70, 0x50, 0x7d, 0x80, 0x95, 0x5f, 0xcd, 0xaa,
    0xcf, 0xf5, 0x16, 0x54, 0x8a, 0xef, 0x28, 0x06, 0x76, 0x1e, 0xaa, 0x3b, 0x87, 0xf4, 0x8b, 0xfe,
    0xf8, 0x5a, 0xf2, 0xc4, 0xf2, 0x76, 0xf2, 0xfb, 0xaf, 0x1f, 0x62, 0x2a, 0x2f, 0xb9, 0xa4, 0x2e,
    0x19, 0xef, 0xbf, 0x4c, 0xac, 0x01, 0x5c, 0x9b, 0x55, 0x5a, 0x4b, 0x3a, 0x08, 0xae, 0x4d, 0x07,
    0x32, 0x24, 0x82, 0xb1, 0x70, 0xca, 0x0f, 0x66, 0x0d, 0x35, 0xfc, 0x79, 0x68, 0x31, 0x49, 0x4c,
    0x57, 0x87, 0x8a, 0xfe, 0xf7, 0x69, 0xff, 0xf8, 0x33, 0x39, 0xf0, 0x70, 0x2c, 0x84, 0x89, 0xd1,
    0x47, 0xd6, 0xfb, 0x01, 0x18, 0x7a, 0xea, 0xac, 0x22, 0x90, 0x98, 0x8b, 0x33, 0x96, 0x18, 0x99,
    0x06, 0x22, 0x34, 0x13, 0x33, 0x25, 0x66, 0xce, 0xcc, 0xc6, 0xc5, 0x23, 0xe9, 0x04, 0x07, 0x82,
    0xe0, 0xe8, 0xef, 0x8b, 0x38, 0x7b, 0x0e, 0xa1, 0x21, 0x57, 0xe3, 0xea, 0x2d, 0xb2, 0x44, 0x4e,
    0xa3, 0x21, 0x08, 0xca, 0x3b, 0x13, 0x89, 0x1c, 0xdc, 0x3d, 0xe1, 0xfb, 0x90, 0x5d, 0x9c, 0xb3,
    0x70, 0xcd, 0x8b, 0xbd, 0xa7, 0x20, 0xb9, 0xcb, 0xb8, 0xfb, 0xf0, 0x42, 0x36, 0x2b, 0xda, 0x2f,
    0xe5, 0xeb, 0x57, 0x86, 0xe2, 0x60, 0x66, 0x2f, 0x0c, 0x7b, 0x12, 0x27, 0x5d, 0xa8, 0xcb, 0x7a,
    0x46, 0xf3, 0x38, 0xb2, 0x22, 0x12, 0x9c, 0x0c, 0x8b, 0x90, 0xc0, 0x57, 0x28, 0x1f, 0x17, 0x56,
    0x4c, 0x1f, 0x11, 0xb6, 0xa0, 0x9d, 0x54, 0x0f, 0xe7, 0xcb, 0xac, 0x8e, 0xfc, 0x6b, 0x8c, 0x7e,
    0x38, 0x72, 0x79, 0xa7, 0x28, 0x77, 0x74, 0x73, 0xbe, 0x7f, 0xeb, 0x54, 0xca, 0xbf, 0x83, 0x67,
    0x03, 0x8c, 0xd9, 0xc8, 0xff, 0x60, 0x28, 0xe7, 0x8c, 0x20, 0xcd, 0x6a, 0xa9, 0xe6, 0x97, 0xd9,
    0x12, 0x6e, 0x53, 0x03, 0xcc, 0xc2, 0xd5, 0xd3, 0x59, 0x7c, 0x85, 0x51, 0x2d, 0x6b, 0x53, 0xe2,
    0x8f, 0x47, 0xc8, 0xbc, 0xae, 0xf8, 0x38, 0xaa, 0xa0, 0x55, 0x1b, 0x5c, 0xe9, 0xd8, 0xfb, 0x28,
    0x4e, 0x49, 0x75, 0x56, 0x39, 0xc1, 0xde, 0x4f, 0xd9, 0x2a, 0x82, 0x30, 0x89, 0xe7, 0x50, 0xb1,
    0x08, 0x6c, 0xe0, 0xd0, 0x2e, 0xcc, 0x2c, 0x10, 0x59, 0xc7, 0xa7, 0x19, 0xae, 0x57, 0xd0, 0x46,
    0x76, 0x0f, 0xc4, 0x2b, 0x20, 0xcf, 0x12, 0xd9, 0x0e, 0x18, 0xda, 0xb9, 0x57, 0x7d, 0x56, 0x23,
    0xb8, 0x70, 0x3f, 0x79, 0x76, 0xae, 0x0c, 0xdf, 0x43, 0x62, 0xc5, 0x24, 0xb2, 0x39, 0x6d, 0x12,
    0xf0, 0x30, 0x05, 0x24, 0xf6, 0xbe, 0xcf, 0x63, 0x6f, 0x0d, 0x94, 0xd0, 0x79, 0xa1, 0x8f, 0x46,
    0xb7, 0x62, 0xf2, 0xa1, 0x25, 0x9d, 0xc2, 0x84, 0x4d, 0xaf, 0x81, 0xe6, 0xb2, 0xe0, 0x0b, 0x57,
    0x29, 0x68, 0x8c, 0x3d, 0xf4, 0x8c, 0x15, 0x53, 0x55, 0x3c, 0x49, 0x7e, 0xed, 0x4c, 0x1c, 0xb0,
    0x04, 0xba, 0xa4, 0x06, 0x1b, 0x13, 0xd3, 0x5e, 0xc8, 0x22, 0xb4, 0x9d, 0x46, 0xf2, 0x41, 0x2f,
    0x47, 0x29, 0x8d, 0xea, 0xc6, 0x74, 0x81, 0x16, 0xfa, 0x63, 0x80, 0x62, 0xa6, 0x7f, 0x62, 0x86,
    0x8e, 0x56, 0x0c, 0x9b, 0xa2, 0x85, 0xf7, 0x19, 0x9b, 0x1d, 0x79, 0x47, 0x38, 0xbf, 0xa3, 0xe8,
    0x14, 0xdc, 0x82, 0xf0, 0xe0, 0x56, 0x60, 0x5c, 0x63, 0x56, 0x21, 0xf1, 0x53, 0x3a, 0xcf, 0xaa,
    0xe5, 0x63, 0xb3, 0x1e, 0x2a, 0x16, 0xda, 0x63, 0xdb, 0xea, 0xcb, 0x42, 0x2b, 0xf6, 0x4c, 0x00,
    0x89, 0xc7, 0x74, 0x45, 0xaf, 0x1b, 0x74, 0xe1, 0xe7, 0xd8, 0xb9, 0xe4, 0x01, 0x85, 0x90, 0x2f,
    0x65, 0x71, 0xc0, 0xca, 0x44, 0x2c, 0xf5, 0x83, 0x98, 0x8e, 0x43, 0x92, 0x35, 0x65, 0xc2, 0xeb,
    0x18, 0x97, 0xc6, 0xd5, 0xda, 0x40, 0x24, 0x8d, 0x00, 0x3f, 0xdd, 0xbb, 0x5a, 0x5a, 0x49, 0xc6,
    0xe5, 0xad, 0xd0, 0x1a, 0x5c, 0x2f, 0xbb, 0xd8, 0x41, 0x1a, 0x14, 0xaa, 0xc5, 0xe4, 0xbf, 0x84,
    0xa6, 0x6e, 0x7b, 0x86, 0xa9, 0xc2, 0xc3, 0x30, 0x81, 0x33, 0xf2, 0xea, 0x68, 0x06, 0x70, 0xd8,
    0x68, 0x2a, 0x27, 0xe9, 0xeb, 0x40, 0x40, 0x59, 0xab, 0x87, 0x7e, 0x98, 0xde, 0x70, 0x24, 0xad,
    0x81, 0xcd, 0xed, 0x46, 0x84, 0xe6, 0x53, 0xf4, 0x10, 0xff, 0xbe, 0x98, 0x0c, 0x96, 0x3f, 0xc0,
    0xe2, 0xca, 0x95, 0x83, 0xae, 0x2e, 0xfb, 0x39, 0x87, 0x51, 0x28, 0x12, 0x06, 0xcb, 0x36, 0xfc,
    0x49, 0xd8, 0xfd, 0x66, 0xbe, 0x7d, 0x5e, 0x52, 0x72, 0xda, 0xa0, 0x52, 0xf8, 0xa3, 0x3c, 0x1a,
    0x67, 0x39, 0x13, 0xe7, 0x88, 0xdc, 0x5f, 0x04, 0x03, 0x6b, 0xdf, 0xc5, 0x0b, 0xad, 0x9e, 0x90,
    0x94, 0x5a, 0xeb, 0x64, 0x67, 0x4d, 0x2a, 0x6d, 0x0a, 0x9f, 0x6a, 0x6a, 0x2f, 0xb6, 0x1e, 0x19,
    0x67, 0xbc, 0x2c, 0xc8, 0x6d, 0xf9, 0x85, 0xef, 0x5a, 0xdf, 0xbd, 0xc5, 0x52, 0x8b, 0x11, 0x63,
    0x30, 0x9f, 0xc9, 0xd2, 0xbf, 0xd2, 0x6e, 0x3b, 0xbc, 0xa3, 0xba, 0x81, 0xf6, 0xc6, 0x80, 0xa9,
    0xee, 0x4b, 0xa3, 0xa9, 0x67, 0xd7, 0xba, 0xe6, 0xec, 0xd1, 0x51, 0x25, 0xe3, 0x85, 0x80, 0xe9,
    0x0a, 0x13, 0x3e, 0x9b, 0xed, 0x96, 0x92, 0x6a, 0x8c, 0x65, 0x79, 0x12, 0xbb, 0x80, 0xa1, 0x7f,
    0xba, 0x07, 0xd9, 0x60, 0xeb, 0x99, 0xf9, 0xb4, 0x90, 0xcf, 0x24, 0x5b, 0x1a, 0x20, 0xdb, 0xae,
    0x1d, 0xec, 0x14, 0xa8, 0xad, 0x8b, 0x16, 0x95, 0x31, 0xd8, 0x76, 0xca, 0x7c, 0xf0, 0xef, 0xc8,
    0x41, 0xa2, 0xb0, 0xea, 0xba, 0xed, 0xbc, 0xd1, 0x63, 0xde, 0x50, 0x89, 0xc8, 0xd0, 0x70, 0x78,
    0x9e, 0xa5, 0xcb, 0x20, 0x8d, 0xf1, 0xac, 0xf8, 0xaf, 0x5e, 0x22, 0x1f, 0x51, 0xd8, 0x45, 0x99,
    0x53, 0xde, 0x6d, 0x09, 0x1f, 0x50, 0x5d, 0x4d, 0x27, 0x82, 0x7d, 0xdd, 0xc0, 0x5a, 0x7b, 0xe3,
    0x91, 0x84, 0xfa, 0x3f, 0x57, 0xc3, 0x77, 0x96, 0x1b, 0xb2, 0x2a, 0x88, 0x36, 0x94, 0x0c, 0x88,
    0xc3, 0x2d, 0xb6, 0x32, 0x9c, 0x8f, 0xb8, 0x66, 0x97, 0x21, 0xd3, 0x1f, 0xae, 0x93, 0x57, 0xde,
    0x92, 0x8e, 0xec, 0x68, 0xcd, 0x50, 0x1c, 0x22, 0x85, 0xc1, 0x68, 0xd6, 0xea, 0x27, 0xfd, 0x57,
    0x4b, 0x15, 0x00, 0xac, 0xd6, 0xbf, 0xc9, 0x60, 0xd9, 0x11, 0x7b, 0xe7, 0x78, 0xae, 0x25, 0xa7,
    0x9d, 0xfe, 0xd1, 0x2e, 0xc2, 0x31, 0x99, 0x46, 0x34, 0x43, 0x17, 0x9d, 0x57, 0xba, 0x5e, 0x94,
    0x16, 0xb2, 0xaf, 0xdd, 0x2d, 0xcb, 0x09, 0x1f, 0x08, 0xb4, 0x85, 0x5b, 0x28, 0x1a, 0xdf, 0x64,
    0x84, 0xd0, 0x57, 0x78, 0xe5, 0x33, 0x13, 0x87, 0xe9, 0xc3, 0xba, 0xb9, 0x33, 0x82, 0x2d, 0x1a,
    0x9d, 0x24, 0x87, 0x9b, 0x4c, 0xda, 0x0a, 0x74, 0x4e, 0x4d, 0x35, 0x84, 0x71, 0x56, 0x9f, 0xb8,
    0x49, 0x98, 0x31, 0x66, 0x84, 0x60, 0xaf, 0xa7, 0xc3, 0x4d, 0x25, 0x67, 0x7f, 0xc8, 0xe0, 0x86,
    0xac, 0x8c, 0xe7, 0xc8, 0x72, 0x41, 0x1e, 0xc7, 0x59, 0x18, 0x3c, 0x18, 0xe9, 0xe1, 0xbd, 0xed,
    0xfa, 0xfa, 0xd9, 0xc8, 0xf4, 0x6b, 0x08, 0x6b, 0x82, 0x50, 0xe7, 0xb3, 0xb9, 0xa8, 0x1e, 0xe8,
    0x6d, 0x5b, 0xf6, 0xe6, 0x54, 0x9b, 0x7d, 0xe5, 0x18, 0x2f, 0x6f, 0xc2, 0x3a, 0x7c, 0x28, 0x56,
    0xb8, 0x24, 0x0b, 0xba, 0x4c, 0xad, 0x8d, 0xec, 0x43, 0x8d, 0x2e, 0xda, 0xd0, 0x3a, 0x63, 0x23,
    0xfe, 0xe4, 0xa2, 0x52, 0x5f, 0xb9, 0x57, 0xa2, 0x33, 0x69, 0xdc, 0x0b, 0x79, 0x7e, 0x4e, 0xbc,
    0x7e, 0xb0, 0x7f, 0x9c, 0x94, 0x5e, 0xa5, 0x8e, 0x28, 0x15, 0x76, 0x5f, 0x8d, 0x83, 0x6f, 0xab,
    0x2f, 0xba, 0x5a, 0x1d, 0xe4, 0xc0, 0x1e, 0x84, 0x69, 0x94, 0x92, 0x04, 0xfb, 0x53, 0x62, 0x7e,
    0xa9, 0x44, 0x48, 0x1d, 0xbe, 0x65, 0xa9, 0xe7, 0x52, 0xe6, 0x0d, 0x74, 0xf6, 0x47, 0xb4, 0x63,
    0xf3, 0x59, 0x65, 0xfb, 0xcf, 0x35, 0xa5, 0x19, 0xb3, 0xf2, 0x5b, 0xfb, 0xad, 0xfd, 0xc5, 0xa3,
    0x0f, 0xe3, 0x95, 0x95, 0x4f, 0xe1, 0x6f, 0x6e, 0x51, 0x08, 0x0c, 0xef, 0x24, 0x67, 0x1b, 0x6f,
    0xaa, 0xe3, 0xaf, 0xe4, 0xab, 0x96, 0x99, 0x28, 0x83, 0x6b, 0x5f, 0x7d, 0x21, 0x1d, 0x91, 0xda,
    0xfc, 0x20, 0xf0, 0x51, 0x90, 0xc5, 0xf7, 0xc5, 0xa2, 0x39, 0x7a, 0x84, 0xb2, 0xcf, 0x48, 0xb3,
    0x8e, 0x38, 0x67, 0x24, 0x9f, 0x24, 0x35, 0xcb, 0x3b, 0x29, 0xcf, 0x84, 0xf0, 0x73, 0x7e, 0x65,
    0x4f, 0xb0, 0x80, 0x53, 0xd1, 0x09, 0x7a, 0x55, 0x95, 0x4e, 0xd6, 0x89, 0x8a, 0xd7, 0x96, 0xc7,
    0xb7, 0x35, 0xfc, 0x5e, 0xb7, 0xd2, 0x3c, 0xee, 0x06, 0x60, 0x31, 0xf8, 0x96, 0x8c, 0xa6, 0x40,
    0xb9, 0x2a, 0xf7, 0xfc, 0x2e, 0xa8, 0xe6, 0xc0, 0xd0, 0x99, 0x05, 0x93, 0x69, 0x87, 0xfe, 0x03,
    0x08, 0xb9, 0x07, 0xcf, 0x34, 0xf6, 0x1b, 0x3c, 0x1b, 0x8d, 0x95, 0xd4, 0x7d, 0x1b, 0x98, 0x0e,
    0x98, 0x7d, 0x7b, 0xa7, 0xc8, 0xba, 0x9b, 0xa1, 0xa1, 0x92, 0x69, 0xf9, 0x92, 0x06, 0x51, 0x2b,
    0x00, 0xa0, 0x3a, 0x85, 0xa4, 0x2c, 0x98, 0x12, 0xae, 0xa7, 0x72, 0xa8, 0x2b, 0xec, 0xee, 0xca,
    0xcb, 0xde, 0x1a, 0x7e, 0x67, 0x33, 0x54, 0xdd, 0xf6, 0xd3, 0x92, 0xef, 0xcb, 0x30, 0x8e, 0x3d,
    0xea, 0x42, 0x76, 0x81, 0x88, 0x9d, 0x47, 0x6f, 0x67, 0x29, 0x7f, 0xeb, 0x18, 0x53, 0x5e, 0x37,
    0x2a, 0x93, 0x1b, 0x6e, 0x87, 0x6c, 0xf1, 0xd1, 0xbe, 0xb2, 0x1b, 0x16, 0xa6, 0x99, 0x2e, 0xb1,
    0x46, 0xb7, 0x22, 0xc8, 0xff, 0x66, 0x7c, 0x42, 0x0c, 0x6c, 0x83, 0x56, 0xde, 0x29, 0xa9, 0x31,
    0x34, 0x33, 0xdb, 0xc7, 0xae, 0x04, 0xd2, 0x26, 0x7f, 0xd9, 0x4c, 0x04, 0x02, 0x64, 0x5c, 0x0b,
    0x0d, 0xac, 0x4b, 0x66, 0xdb, 0xa4, 0x81, 0x34, 0xfb, 0xc0, 0x5c, 0x29, 0xd7, 0xac, 0xd1, 0x6c,
    0xe3, 0x4e, 0xa9, 0x43, 0x64, 0x21, 0xce, 0x20, 0x7f, 0x5a, 0x0b, 0x04, 0x7c, 0xde, 0xf7, 0x32,
    0x95, 0x7a, 0x9d, 0xca, 0x6c, 0x37, 0x86, 0x87, 0x96, 0x74, 0x2b, 0xf0, 0xd1, 0x66, 0x81, 0xb9,
    0xc4, 0x25, 0x25, 0x80, 0x49, 0x2a, 0xde, 0x9f, 0x96, 0x65, 0x3d, 0xc8, 0x69, 0x0b, 0xd8, 0xbc,
    0x58, 0x26, 0x61, 0x45, 0x05, 0x4b, 0x3d, 0xa8, 0x08, 0x39, 0x36, 0x02, 0x35, 0x68, 0x0a, 0x77,
    0x76, 0x19, 0x81, 0xc8, 0x13, 0xf7, 0xc3, 0xa6, 0xc4, 0x63, 0x42, 0x24, 0x8d, 0xdc, 0x66, 0x56,
    0x54, 0x83, 0xb0, 0xbc, 0x14, 0x10, 0x6c, 0x81, 0xf6, 0x98, 0x90, 0xd6, 0x6a, 0x9f, 0x9b, 0xfe,
    0x4e, 0x49, 0x6d, 0x3f, 0xb2, 0x54, 0x3f, 0xb6, 0x2b, 0x7a, 0x97, 0xa7, 0xe0, 0xa9, 0x13, 0x55,
    0x1d, 0xd9, 0xe3, 0x7a, 0x0c, 0xf8, 0xa2, 0xc4, 0xe3, 0x68, 0x5d, 0xbb, 0x12, 0x85, 0x58, 0xdb,
    0x4f, 0x3b, 0x61, 0x69, 0x3e, 0xc2, 0x79, 0xa3, 0xc3, 0xe3, 0x58, 0xdf, 0x87, 0xcc, 0x45, 0xe5,
    0x70, 0x00, 0xa5, 0xd3, 0xe7, 0x5a, 0xd1, 0x9c, 0x89, 0xe9, 0x7d, 0xcb, 0x6d, 0x65, 0x70, 0x68,
    0x83, 0x3c, 0x73, 0xb0, 0xca, 0x43, 0x97, 0x10, 0x32, 0xfc, 0x2f, 0x7e, 0x6d, 0xba, 0x36, 0x0b,
    0x23, 0xe6, 0xed, 0xa3, 0x77, 0x81, 0xec, 0x4a, 0xda, 0x8d, 0x6f, 0x23, 0x62, 0xcf, 0x84, 0x43,
    0x49, 0x0a, 0x03, 0x5c, 0x97, 0xe6, 0xef, 0xca, 0xde, 0xef, 0x20, 0x0e, 0x1d, 0x4e, 0x08, 0x15,
    0xbd, 0xbc, 0x3d, 0x7a, 0x0d, 0x79, 0xb9, 0xa0, 0x47, 0x49, 0xa7, 0xf3, 0x85, 0x56, 0x6b, 0x31,
    0x82, 0xcb, 0xd8, 0x2c, 0x3a, 0xf1, 0x80, 0x98, 0xf7, 0x5c, 0x86, 0x93, 0xa7, 0x5a, 0x04, 0x05,
    0x6b, 0x20, 0xcc, 0x05, 0xa6, 0x23, 0xb9, 0xb2, 0x03, 0x17, 0x85, 0x11, 0x8a, 0x14, 0x76, 0x77,
    0x00, 0x72, 0x18, 0x05, 0x39, 0xf1, 0xcf, 0xdb, 0xaa, 0xf4, 0x93, 0x8d, 0xfd, 0x9c, 0xb1, 0xbe,
    0x02, 0xed, 0x86, 0xb6, 0xae, 0x5f, 0x3c, 0x12, 0xb4, 0xb1, 0x19, 0x3c, 0x4c, 0x95, 0x2e, 0x4d,
    0x8b, 0x75, 0x65, 0xbd, 0x77, 0xe0, 0x8d, 0x36, 0x5b, 0xa2, 0x34, 0xb5, 0x0c, 0xfa, 0x3d, 0x56,
    0x14, 0x0e, 0xef, 0x31, 0xcc, 0x95, 0xf1, 0x4e, 0xa5, 0xea, 0xe8, 0xb5, 0x37, 0x6f, 0x11, 0xed,
    0xc9, 0x42, 0x09, 0x7b, 0x9d, 0xf9, 0x89, 0x37, 0x1a, 0x40, 0x84, 0x2d, 0x03, 0x7b, 0x6b, 0x2a,
    0x7a, 0xa0, 0x98, 0xc8, 0x5a, 0x14, 0xa7, 0x7f, 0x00, 0xe4, 0x7c, 0x9c, 0x01, 0x62, 0x86, 0x42,
    0x41, 0xa8, 0xf5, 0xaa, 0xcc, 0xe5, 0x8f, 0x9c, 0xbe, 0x10, 0x5a, 0xa0, 0x24, 0x74, 0x00, 0x4d,
    0x86, 0x83, 0xbe, 0xc7, 0xad, 0xaa, 0xfb, 0x54, 0xb1, 0x85, 0xff, 0x0a, 0x53, 0x12, 0x07, 0xea,
];

#[derive(Debug, thiserror::Error)]
pub enum SignatureError {
    #[error("failed to read file: {path}: {source}")]
    ReadError {
        path: String,
        source: std::io::Error,
    },

    #[error("invalid public key: {0}")]
    InvalidPublicKey(String),

    #[error("invalid signature: {0}")]
    InvalidSignature(String),

    #[error("signature verification failed: {0}")]
    VerificationFailed(String),

    #[error("signing failed: {0}")]
    SigningFailed(String),

    #[error("signature is invalid for this binary")]
    SignatureMismatch,

    #[error("context too long: {0}")]
    ContextTooLong(String),
}

/// Verify an ML-DSA-65 signature on a binary using the embedded release signing key.
pub fn verify_binary_signature(
    binary_path: &Path,
    signature_bytes: &[u8],
) -> Result<(), SignatureError> {
    verify_binary_signature_with_key(binary_path, signature_bytes, RELEASE_SIGNING_KEY)
}

/// Verify an ML-DSA-65 signature on a binary using a provided public key.
///
/// This is the core verification function, also used for testing with test keys.
pub fn verify_binary_signature_with_key(
    binary_path: &Path,
    signature_bytes: &[u8],
    public_key_bytes: &[u8],
) -> Result<(), SignatureError> {
    debug!(binary_path = %binary_path.display(), "Verifying signature for: {}", binary_path.display());

    let binary_data = std::fs::read(binary_path).map_err(|e| SignatureError::ReadError {
        path: binary_path.display().to_string(),
        source: e,
    })?;

    verify_bytes_signature_with_key(&binary_data, signature_bytes, public_key_bytes)
}

/// Verify an ML-DSA-65 signature on raw bytes using a provided public key.
pub fn verify_bytes_signature_with_key(
    data: &[u8],
    signature_bytes: &[u8],
    public_key_bytes: &[u8],
) -> Result<(), SignatureError> {
    let public_key = MlDsaPublicKey::from_bytes(MlDsaVariant::MlDsa65, public_key_bytes)
        .map_err(|e| SignatureError::InvalidPublicKey(e.to_string()))?;

    let signature = MlDsaSignature::from_bytes(MlDsaVariant::MlDsa65, signature_bytes)
        .map_err(|e| SignatureError::InvalidSignature(e.to_string()))?;

    let dsa = ml_dsa_65();
    let valid = dsa
        .verify_with_context(&public_key, data, &signature, SIGNING_CONTEXT)
        .map_err(|e| SignatureError::VerificationFailed(e.to_string()))?;

    if valid {
        debug!("Signature verified successfully");
        Ok(())
    } else {
        Err(SignatureError::SignatureMismatch)
    }
}

/// Verify a release manifest against its detached signature using the embedded release key.
///
/// This is the Stage 1 verification entry point. Cheap (small JSON payload), called before
/// any archive downloads.
pub fn verify_manifest_signature(
    manifest_json: &[u8],
    signature: &[u8],
) -> Result<(), SignatureError> {
    verify_bytes_signature_with_key(manifest_json, signature, RELEASE_SIGNING_KEY)
}

/// Convenience wrapper: verify from a binary file and a detached `.sig` file.
pub fn verify_from_file(binary_path: &Path, sig_path: &Path) -> Result<(), SignatureError> {
    let sig_bytes = std::fs::read(sig_path).map_err(|e| SignatureError::ReadError {
        path: sig_path.display().to_string(),
        source: e,
    })?;
    verify_binary_signature(binary_path, &sig_bytes)
}

/// Convenience wrapper: verify from files using a provided public key.
pub fn verify_from_file_with_key(
    binary_path: &Path,
    sig_path: &Path,
    public_key_bytes: &[u8],
) -> Result<(), SignatureError> {
    let sig_bytes = std::fs::read(sig_path).map_err(|e| SignatureError::ReadError {
        path: sig_path.display().to_string(),
        source: e,
    })?;
    verify_binary_signature_with_key(binary_path, &sig_bytes, public_key_bytes)
}

/// Sign data with an ML-DSA-65 secret key and the release signing context.
///
/// Used by x0x-keygen for signing release archives.
pub fn sign_with_context(secret_key_bytes: &[u8], data: &[u8]) -> Result<Vec<u8>, SignatureError> {
    use saorsa_pqc::api::sig::MlDsaSecretKey;

    let secret_key = MlDsaSecretKey::from_bytes(MlDsaVariant::MlDsa65, secret_key_bytes)
        .map_err(|e| SignatureError::SigningFailed(format!("invalid secret key: {e}")))?;

    let dsa = ml_dsa_65();
    let signature = dsa
        .sign_with_context(&secret_key, data, SIGNING_CONTEXT)
        .map_err(|e| SignatureError::SigningFailed(e.to_string()))?;

    Ok(signature.to_bytes())
}

#[cfg(test)]
mod tests {
    use super::*;
    use saorsa_pqc::api::sig::ml_dsa_65;
    use tempfile::TempDir;

    fn generate_test_keypair() -> (Vec<u8>, Vec<u8>) {
        let dsa = ml_dsa_65();
        let (public_key, secret_key) = dsa.generate_keypair().unwrap();
        (public_key.to_bytes(), secret_key.to_bytes())
    }

    fn sign_data(secret_key_bytes: &[u8], data: &[u8]) -> Vec<u8> {
        sign_with_context(secret_key_bytes, data).unwrap()
    }

    #[test]
    fn test_valid_signature_verification() {
        let (pk, sk) = generate_test_keypair();
        let data = b"test binary content";
        let sig = sign_data(&sk, data);

        let dir = TempDir::new().unwrap();
        let binary_path = dir.path().join("test.bin");
        std::fs::write(&binary_path, data).unwrap();

        verify_binary_signature_with_key(&binary_path, &sig, &pk).unwrap();
    }

    #[test]
    fn test_invalid_signature_rejected() {
        let (pk, _sk) = generate_test_keypair();
        let data = b"test binary content";
        let bad_sig = vec![0u8; SIGNATURE_SIZE];

        let dir = TempDir::new().unwrap();
        let binary_path = dir.path().join("test.bin");
        std::fs::write(&binary_path, data).unwrap();

        let result = verify_binary_signature_with_key(&binary_path, &bad_sig, &pk);
        assert!(result.is_err());
    }

    #[test]
    fn test_wrong_key_rejected() {
        let (_pk1, sk1) = generate_test_keypair();
        let (pk2, _sk2) = generate_test_keypair();
        let data = b"test binary content";
        let sig = sign_data(&sk1, data);

        let dir = TempDir::new().unwrap();
        let binary_path = dir.path().join("test.bin");
        std::fs::write(&binary_path, data).unwrap();

        let result = verify_binary_signature_with_key(&binary_path, &sig, &pk2);
        assert!(result.is_err());
    }

    #[test]
    fn test_modified_binary_rejected() {
        let (pk, sk) = generate_test_keypair();
        let data = b"original content";
        let sig = sign_data(&sk, data);

        let dir = TempDir::new().unwrap();
        let binary_path = dir.path().join("test.bin");
        std::fs::write(&binary_path, b"modified content").unwrap();

        let result = verify_binary_signature_with_key(&binary_path, &sig, &pk);
        assert!(result.is_err());
    }

    #[test]
    fn test_malformed_signature_rejected() {
        let (pk, _sk) = generate_test_keypair();
        let data = b"test binary content";
        let bad_sig = vec![0u8; 10]; // Wrong size

        let dir = TempDir::new().unwrap();
        let binary_path = dir.path().join("test.bin");
        std::fs::write(&binary_path, data).unwrap();

        let result = verify_binary_signature_with_key(&binary_path, &bad_sig, &pk);
        assert!(matches!(result, Err(SignatureError::InvalidSignature(_))));
    }

    #[test]
    fn test_empty_file_handling() {
        let (pk, sk) = generate_test_keypair();
        let data = b"";
        let sig = sign_data(&sk, data);

        let dir = TempDir::new().unwrap();
        let binary_path = dir.path().join("empty.bin");
        std::fs::write(&binary_path, data).unwrap();

        verify_binary_signature_with_key(&binary_path, &sig, &pk).unwrap();
    }

    #[test]
    fn test_nonexistent_file() {
        let (pk, sk) = generate_test_keypair();
        let sig = sign_data(&sk, b"data");

        let result = verify_binary_signature_with_key(Path::new("/nonexistent/path"), &sig, &pk);
        assert!(matches!(result, Err(SignatureError::ReadError { .. })));
    }

    #[test]
    fn test_verify_from_detached_sig_file() {
        let (pk, sk) = generate_test_keypair();
        let data = b"test binary content";
        let sig = sign_data(&sk, data);

        let dir = TempDir::new().unwrap();
        let binary_path = dir.path().join("test.bin");
        let sig_path = dir.path().join("test.bin.sig");
        std::fs::write(&binary_path, data).unwrap();
        std::fs::write(&sig_path, &sig).unwrap();

        verify_from_file_with_key(&binary_path, &sig_path, &pk).unwrap();
    }

    #[test]
    fn test_large_binary_verification() {
        let (pk, sk) = generate_test_keypair();
        let data = vec![0xABu8; 1024 * 1024]; // 1 MiB
        let sig = sign_data(&sk, &data);

        let dir = TempDir::new().unwrap();
        let binary_path = dir.path().join("large.bin");
        std::fs::write(&binary_path, &data).unwrap();

        verify_binary_signature_with_key(&binary_path, &sig, &pk).unwrap();
    }

    #[test]
    fn test_signing_context_domain_separation() {
        // The signing context is hardcoded — just verify it's the expected value
        assert_eq!(SIGNING_CONTEXT, b"x0x-release-v1");
    }

    #[test]
    fn test_public_key_size_constant() {
        assert_eq!(PUBLIC_KEY_SIZE, 1952);
        assert_eq!(PUBLIC_KEY_SIZE, MlDsaVariant::MlDsa65.public_key_size());
    }
}