update_crypto.c File Reference

This file contains functions related to OpenPGP in VLC update management. More...

Include dependency graph for update_crypto.c:

Macros
#define	packet_type(c)   ( ( c & 0x3c ) >> 2 ) /* 0x3C = 00111100 */
#define	packet_header_len(c)   ( ( c & 0x03 ) + 1 ) /* number of bytes in a packet header */
#define	READ_MPI(d, bits)
#define	CRC24_INIT   0xB704CEL
#define	CRC24_POLY   0x1864CFBL
#define	PUBLIC_KEY_FOUND   0x01
#define	USER_ID_FOUND   0x02
#define	SIGNATURE_FOUND   0X04

Functions
static uint32_t	scalar_number (const uint8_t *p, int header_len)
static uint32_t	mpi_len (const uint8_t *mpi)
static size_t	read_mpi (uint8_t *dst, const uint8_t *buf, size_t buflen, size_t bits)
static int	parse_public_key_packet (public_key_packet_t *p_key, const uint8_t *p_buf, size_t i_packet_len)
static size_t	parse_signature_v3_packet (signature_packet_t *p_sig, const uint8_t *p_buf, size_t i_sig_len)
static size_t	parse_signature_v4_packet (signature_packet_t *p_sig, const uint8_t *p_buf, size_t i_sig_len)
static int	parse_signature_packet (signature_packet_t *p_sig, const uint8_t *p_buf, size_t i_packet_len)
static long	crc_octets (uint8_t *octets, size_t len)
static int	pgp_unarmor (const char *p_ibuf, size_t i_ibuf_len, uint8_t *p_obuf, size_t i_obuf_len)
static int	rsa_pkcs1_encode_sig (gcry_mpi_t *r_result, size_t size, const uint8_t *hash, int algo)
static int	verify_signature_rsa (signature_packet_t *sign, public_key_packet_t *p_key, uint8_t *p_hash)
static int	verify_signature_dsa (signature_packet_t *sign, public_key_packet_t *p_key, uint8_t *p_hash)
int	verify_signature (signature_packet_t *sign, public_key_packet_t *p_key, uint8_t *p_hash)
int	parse_public_key (const uint8_t *p_key_data, size_t i_key_len, public_key_t *p_key, const uint8_t *p_sig_issuer)
static int	hash_from_binary_file (const char *psz_file, gcry_md_hd_t hd)
static uint8_t *	hash_finish (gcry_md_hd_t hd, signature_packet_t *p_sig)
uint8_t *	hash_from_text (const char *psz_string, signature_packet_t *p_sig)
uint8_t *	hash_from_file (const char *psz_file, signature_packet_t *p_sig)
uint8_t *	hash_from_public_key (public_key_t *p_pkey)
public_key_t *	download_key (vlc_object_t *p_this, const uint8_t *p_longid, const uint8_t *p_signature_issuer)
int	download_signature (vlc_object_t *p_this, signature_packet_t *p_sig, const char *psz_url)

Detailed Description

This file contains functions related to OpenPGP in VLC update management.

Macro Definition Documentation

CRC24_INIT

#define CRC24_INIT   0xB704CEL

CRC24_POLY

#define CRC24_POLY   0x1864CFBL

packet_header_len

#define packet_header_len

(

c

)

( ( c & 0x03 ) + 1 ) /* number of bytes in a packet header */

packet_type

#define packet_type

(

c

)

( ( c & 0x3c ) >> 2 ) /* 0x3C = 00111100 */

PUBLIC_KEY_FOUND

#define PUBLIC_KEY_FOUND   0x01

READ_MPI

#define READ_MPI	(		d,
			bits
	)

Value:

    do { \
    size_t n = read_mpi(d, p_buf, i_packet_len - i_read, bits); \
    if (!n) goto error; \
    p_buf += n; \
    i_read += n; \
} while(0)

SIGNATURE_FOUND

#define SIGNATURE_FOUND   0X04

USER_ID_FOUND

#define USER_ID_FOUND   0x02

Function Documentation

crc_octets()

static long crc_octets ( uint8_t *  octets, size_t  len  )

static

References CRC24_INIT, and CRC24_POLY.

Referenced by pgp_unarmor().

download_key()

public_key_t * download_key	(	vlc_object_t *	p_this,
		const uint8_t *	p_longid,
		const uint8_t *	p_signature_issuer
	)

References asprintf(), public_key_t::longid, msg_Dbg, parse_public_key(), vlc_stream_Delete(), vlc_stream_GetSize(), vlc_stream_NewURL, vlc_stream_Read(), and VLC_SUCCESS.

Referenced by GetUpdateFile().

download_signature()

int download_signature	(	vlc_object_t *	p_this,
		signature_packet_t *	p_sig,
		const char *	psz_url
	)

References BINARY_SIGNATURE, signature_packet_t::hashed_data, msg_Dbg, packet_header_len, packet_type, parse_signature_packet(), pgp_unarmor(), scalar_number(), SIGNATURE_PACKET, signature_packet_t::specific, TEXT_SIGNATURE, signature_packet_t::type, signature_packet_t::unhashed_data, signature_packet_t::v4, signature_packet_t::version, VLC_EGENERIC, VLC_ENOMEM, vlc_stream_Delete(), vlc_stream_GetSize(), vlc_stream_NewURL, vlc_stream_Read(), and VLC_SUCCESS.

Referenced by GetUpdateFile(), and update_DownloadReal().

hash_finish()

static uint8_t * hash_finish ( gcry_md_hd_t  hd, signature_packet_t *  p_sig  )

static

References signature_packet_t::digest_algo, signature_packet_t::hashed_data, signature_packet_t::hashed_data_len, signature_packet_t::public_key_algo, scalar_number(), signature_packet_t::specific, signature_packet_t::timestamp, signature_packet_t::type, signature_packet_t::v3, signature_packet_t::v4, and signature_packet_t::version.

Referenced by hash_from_file(), hash_from_public_key(), and hash_from_text().

hash_from_binary_file()

static int hash_from_binary_file ( const char *  psz_file, gcry_md_hd_t  hd  )

static

References vlc_fopen().

Referenced by hash_from_file().

hash_from_file()

uint8_t * hash_from_file	(	const char *	psz_file,
		signature_packet_t *	p_sig
	)

References signature_packet_t::digest_algo, hash_finish(), and hash_from_binary_file().

Referenced by update_DownloadReal().

hash_from_public_key()

uint8_t * hash_from_public_key

(

public_key_t *

p_pkey

)

References public_key_packet_t::algo, signature_packet_t::digest_algo, public_key_packet_t::dsa, public_key_packet_t::e, public_key_packet_t::g, GENERIC_KEY_SIGNATURE, hash_finish(), signature_packet_t::hash_verification, public_key_t::key, mpi_len(), public_key_packet_t::n, public_key_packet_t::p, POSITIVE_KEY_SIGNATURE, public_key_t::psz_username, public_key_packet_t::q, public_key_packet_t::rsa, public_key_packet_t::sig, public_key_t::sig, public_key_packet_t::timestamp, signature_packet_t::type, public_key_packet_t::version, signature_packet_t::version, and public_key_packet_t::y.

Referenced by GetUpdateFile().

hash_from_text()

uint8_t * hash_from_text	(	const char *	psz_string,
		signature_packet_t *	p_sig
	)

References signature_packet_t::digest_algo, hash_finish(), TEXT_SIGNATURE, and signature_packet_t::type.

Referenced by GetUpdateFile().

mpi_len()

static uint32_t mpi_len ( const uint8_t *  mpi )

static

References scalar_number().

Referenced by hash_from_public_key(), read_mpi(), verify_signature_dsa(), and verify_signature_rsa().

parse_public_key()

int parse_public_key	(	const uint8_t *	p_key_data,
		size_t	i_key_len,
		public_key_t *	p_key,
		const uint8_t *	p_sig_issuer
	)

References signature_packet_t::hashed_data, i_type, signature_packet_t::issuer_longid, public_key_t::key, packet_header_len, packet_type, parse_public_key_packet(), parse_signature_packet(), pgp_unarmor(), public_key_t::psz_username, PUBLIC_KEY_FOUND, PUBLIC_KEY_PACKET, scalar_number(), public_key_t::sig, SIGNATURE_FOUND, SIGNATURE_PACKET, signature_packet_t::specific, signature_packet_t::unhashed_data, USER_ID_FOUND, USER_ID_PACKET, signature_packet_t::v4, signature_packet_t::version, VLC_EGENERIC, VLC_ENOMEM, and VLC_SUCCESS.

Referenced by download_key(), and GetUpdateFile().

parse_public_key_packet()

static int parse_public_key_packet ( public_key_packet_t *  p_key, const uint8_t *  p_buf, size_t  i_packet_len  )

static

References public_key_packet_t::algo, public_key_packet_t::dsa, public_key_packet_t::e, public_key_packet_t::g, public_key_packet_t::n, public_key_packet_t::p, public_key_packet_t::q, READ_MPI, public_key_packet_t::rsa, public_key_packet_t::sig, public_key_packet_t::timestamp, public_key_packet_t::version, VLC_EGENERIC, VLC_SUCCESS, and public_key_packet_t::y.

Referenced by parse_public_key().

parse_signature_packet()

static int parse_signature_packet ( signature_packet_t *  p_sig, const uint8_t *  p_buf, size_t  i_packet_len  )

static

References signature_packet_t::algo_specific, BINARY_SIGNATURE, CASUAL_KEY_SIGNATURE, signature_packet_t::dsa, GENERIC_KEY_SIGNATURE, signature_packet_t::hashed_data, parse_signature_v3_packet(), parse_signature_v4_packet(), PERSONA_KEY_SIGNATURE, POSITIVE_KEY_SIGNATURE, signature_packet_t::public_key_algo, signature_packet_t::r, READ_MPI, signature_packet_t::rsa, signature_packet_t::s, signature_packet_t::specific, TEXT_SIGNATURE, signature_packet_t::type, signature_packet_t::unhashed_data, signature_packet_t::v4, signature_packet_t::version, VLC_EGENERIC, and VLC_SUCCESS.

Referenced by download_signature(), and parse_public_key().

parse_signature_v3_packet()

static size_t parse_signature_v3_packet ( signature_packet_t *  p_sig, const uint8_t *  p_buf, size_t  i_sig_len  )

static

References signature_packet_t::digest_algo, signature_packet_t::hash_verification, signature_packet_t::hashed_data_len, signature_packet_t::issuer_longid, signature_packet_t::public_key_algo, signature_packet_t::specific, signature_packet_t::timestamp, signature_packet_t::type, and signature_packet_t::v3.

Referenced by parse_signature_packet().

parse_signature_v4_packet()

static size_t parse_signature_v4_packet ( signature_packet_t *  p_sig, const uint8_t *  p_buf, size_t  i_sig_len  )

static

References signature_packet_t::digest_algo, signature_packet_t::hash_verification, signature_packet_t::hashed_data, signature_packet_t::hashed_data_len, signature_packet_t::issuer_longid, ISSUER_SUBPACKET, p, signature_packet_t::public_key_algo, scalar_number(), signature_packet_t::specific, signature_packet_t::type, U32_AT(), signature_packet_t::unhashed_data, signature_packet_t::unhashed_data_len, and signature_packet_t::v4.

Referenced by parse_signature_packet().

pgp_unarmor()

static int pgp_unarmor ( const char *  p_ibuf, size_t  i_ibuf_len, uint8_t *  p_obuf, size_t  i_obuf_len  )

static

References crc_octets(), and vlc_b64_decode_binary_to_buffer().

Referenced by download_signature(), and parse_public_key().

read_mpi()

static size_t read_mpi ( uint8_t *  dst, const uint8_t *  buf, size_t  buflen, size_t  bits  )

static

References mpi_len().

rsa_pkcs1_encode_sig()

static int rsa_pkcs1_encode_sig ( gcry_mpi_t *  r_result, size_t  size, const uint8_t *  hash, int  algo  )

static

References VLC_EGENERIC, and VLC_SUCCESS.

Referenced by verify_signature_rsa().

scalar_number()

static uint32_t scalar_number ( const uint8_t *  p, int  header_len  )

inlinestatic

References p.

Referenced by download_signature(), hash_finish(), mpi_len(), parse_public_key(), and parse_signature_v4_packet().

verify_signature()

int verify_signature	(	signature_packet_t *	sign,
		public_key_packet_t *	p_key,
		uint8_t *	p_hash
	)

References signature_packet_t::public_key_algo, verify_signature_dsa(), verify_signature_rsa(), and VLC_EGENERIC.

Referenced by GetUpdateFile(), and update_DownloadReal().

verify_signature_dsa()

static int verify_signature_dsa ( signature_packet_t *  sign, public_key_packet_t *  p_key, uint8_t *  p_hash  )

static

References signature_packet_t::algo_specific, signature_packet_t::digest_algo, public_key_packet_t::dsa, signature_packet_t::dsa, public_key_packet_t::g, mpi_len(), p, public_key_packet_t::p, public_key_packet_t::q, signature_packet_t::r, signature_packet_t::s, public_key_packet_t::sig, VLC_EGENERIC, VLC_SUCCESS, and public_key_packet_t::y.

Referenced by verify_signature().

verify_signature_rsa()

static int verify_signature_rsa ( signature_packet_t *  sign, public_key_packet_t *  p_key, uint8_t *  p_hash  )

static

References signature_packet_t::algo_specific, signature_packet_t::digest_algo, public_key_packet_t::e, mpi_len(), public_key_packet_t::n, public_key_packet_t::rsa, signature_packet_t::rsa, rsa_pkcs1_encode_sig(), signature_packet_t::s, public_key_packet_t::sig, VLC_EGENERIC, and VLC_SUCCESS.

Referenced by verify_signature().