di!(dZddlmZddlmZdZdZdZdZdZ e gd Z e gd Z e ed dgZ e ed d gZe e d eee ge eee e Zd!dZd"dZd#d$dZd%d&dZd'dZd(d ZdS))a Minimal, dependency-free ASN.1/DER encoder & decoder for secp256k1 EC private keys. This module implements just enough DER encoding/decoding to support: 1. Outputting a DER-encoded PKCS#8 EC private key (with an embedded ECPrivateKey per RFC 5915) 2. Reading such a DER-encoded EC private key Only the following ASN.1 types are supported: - INTEGER - BIT STRING - OCTET STRING - OBJECT IDENTIFIER - SEQUENCE - Context-specific EXPLICIT tags (for the optional public key) The expected DER structure is as follows: PrivateKeyInfo ::= SEQUENCE { version INTEGER, -- must be 0 privateKeyAlgorithm SEQUENCE { algorithm OBJECT IDENTIFIER, -- id-ecPublicKey (1.2.840.10045.2.1) parameters OBJECT IDENTIFIER -- secp256k1 (1.3.132.0.10) }, privateKey OCTET STRING -- DER encoding of ECPrivateKey } ECPrivateKey ::= SEQUENCE { version INTEGER, -- must be 1 privateKey OCTET STRING, -- the secret bytes publicKey [1] EXPLICIT BIT STRING OPTIONAL -- uncompressed public key } ) annotations) int_to_bytes0)*H=r)+rr rlengthintreturnbytesc|dkrt|gSt|}tdt|zg|zS)zEncode a length in DER format.)rrlen)r length_bytess K/var/www/html/volatility/venv/lib/python3.11/site-packages/coincurve/der.py encode_lengthrBsM||fX ''L $\***+ , ,| ;;valuectt|}t|}td|zt|z}t|d<||dd|z<||d|zd<t |S)z%Encode an OCTET STRING in DER format.rrN)rr bytearrayOCTET_STRING_TAGr)rrlength_bytes_lenresults rencode_octet_stringr%Ms U,,L<(( q++c%jj8 9 9F F1I'3F1q## #$%*F1  ! !" ==r unused_bitsctt|dz}t|}td|zdzt|z}t|d<||dd|z<||d|z<||d|zdzd<t |S)z"Encode a BIT STRING in DER format.rrN)rrr!BIT_STRING_TAGr)rr&rr#r$s rencode_bit_stringr)Xs Ua00L<(( q++a/#e**< = =FF1I'3F1q## #$#.F1  ).F1 ! # % %& ==rN private_key public_key bytes | Nonectt}t|}|||jt |}t |}|d|t|||ttg}|tt |||t|}ttg}dt tzt |z} |t| |t|t||t|S)aU Encode an EC private key in DER format (PKCS#8/RFC 5208). Optimized for secp256k1 keys. Parameters: private_key: The private key as bytes (32 bytes for secp256k1) public_key: The public key as bytes (65 bytes uncompressed for secp256k1, starting with 0x04) Returns: The DER-encoded private key Nr) r!VERSION_INTEGER_ONEr%extendr)rappendr SEQUENCE_TAGEC_ALGORITHM_IDENTIFIERVERSION_INTEGER_ZEROr) r*r+ ec_key_bufferprivate_key_os public_key_bs pubkey_len ec_key_seq ec_key_osr$ outer_lens r encode_derr<ds122M)55N((()*55 '' T"""]:66777]+++L>**JmC $6$677888m$$$$J//I ~ & &FC/0003y>>AI MM- **+++ MM&''' MM)*** MM) ==rdataoffsettuple[int, int]c||}|dz }|dkr||fS|dz}d}t|D]}|dz||z}|dz }||fS)z Decode a DER length field. Parameters: data: The DER-encoded data offset: The current offset in the data Returns: Tuple of (length, new_offset) rrr)range)r=r> length_bytenum_length_bytesr_s r decode_lengthrGsv,K aKFSF""#T) F # $ $A+f-!  6>rder_datact|dks|dtkrd}t|d}t||\}}||tkrd}t||dz }t||\}}||z }||tkrd}t||dz }t||\}}||z}||t krd}t||dz }t||\}}||||z}|tt ks |t krd}t||}||tkrd }t||dz }t||\} }|||| z} t| d ks| dtkrd }t|d} t| | \}} | | tkrd }t|| dz } t| | \} } | | z } | | tkrd }t|| dz } t| | \} } | | | | zS)z Decode a DER-encoded EC private key to extract the private key secret. Optimized for secp256k1 keys. Parameters: der_data: The DER-encoded private key in PKCS#8 format Returns: The private key secret as bytes "rz)Invalid DER: not a valid PKCS#8 structurerz-Invalid DER: expected INTEGER tag for versionz0Invalid DER: expected SEQUENCE tag for algorithmz+Invalid DER: expected OBJECT IDENTIFIER tagzNot an EC private keyz2Invalid DER: expected OCTET STRING for private keyrz'Invalid EC key format: missing sequencez&Invalid EC key format: missing versionz5Invalid DER: expected OCTET STRING for EC private key)rr2 ValueErrorrG INTEGER_TAGOBJECT_IDENTIFIER_TAG EC_PUBKEY_OIDr")rHmsgr>rF version_lenalg_lenalg_endoid_len algorithm_oidpriv_lenec_data ec_offset ec_ver_lenkey_lens r decode_derrZs 8}}rXa[L889ooFh//IAv;&&=oo aKF'&99K kF<''@oo aKF#Hf55OGVwG000;oo aKF#Hf55OGVVfw&667M#m$$$$ (F(F%ooF+++Boo aKF$Xv66Hfv 112G 7||a71:557ooI )44LAyy[((6oo NI)'9==J  Iy---Eoo NI&w ::GY 9y722 33r)rrrr)rrrr)r)rrr&rrr)N)r*rr+r,rr)r=rr>rrr?)rHrrr)__doc__ __future__rcoincurve.utilsrrLr(r"rMr2rrN SECP256K1_OIDr4r/rr3rr%r)r<rGrZrrr`s!!F#"""""((((((  @@@AA 44455 uk4677e[$566%C  !  !  !C  ! !  <<<<     33333l6Y4Y4Y4Y4Y4Y4r