/* LibTomCrypt, modular cryptographic library -- Tom St Denis */
/* SPDX-License-Identifier: Unlicense */
/* ---- NUMBER THEORY ---- */
enum public_key_type {
/* Refers to the public key */
PK_PUBLIC = 0x0000,
/* Refers to the private key */
PK_PRIVATE = 0x0001,
/* Indicates standard output formats that can be read e.g. by OpenSSL or GnuTLS */
PK_STD = 0x1000,
/* Indicates compressed public ECC key */
PK_COMPRESSED = 0x2000,
/* Indicates ECC key with the curve specified by OID */
PK_CURVEOID = 0x4000
};
int rand_prime(void *N, long len, prng_state *prng, int wprng);
/* ---- RSA ---- */
#ifdef LTC_MRSA
/** RSA PKCS style key */
typedef struct Rsa_key {
/** Type of key, PK_PRIVATE or PK_PUBLIC */
int type;
/** The public exponent */
void *e;
/** The private exponent */
void *d;
/** The modulus */
void *N;
/** The p factor of N */
void *p;
/** The q factor of N */
void *q;
/** The 1/q mod p CRT param */
void *qP;
/** The d mod (p - 1) CRT param */
void *dP;
/** The d mod (q - 1) CRT param */
void *dQ;
} rsa_key;
int rsa_make_key(prng_state *prng, int wprng, int size, long e, rsa_key *key);
int rsa_get_size(const rsa_key *key);
int rsa_exptmod(const unsigned char *in, unsigned long inlen,
unsigned char *out, unsigned long *outlen, int which,
const rsa_key *key);
void rsa_free(rsa_key *key);
/* These use PKCS #1 v2.0 padding */
#define rsa_encrypt_key(in, inlen, out, outlen, lparam, lparamlen, prng, prng_idx, hash_idx, key) \
rsa_encrypt_key_ex(in, inlen, out, outlen, lparam, lparamlen, prng, prng_idx, hash_idx, LTC_PKCS_1_OAEP, key)
#define rsa_decrypt_key(in, inlen, out, outlen, lparam, lparamlen, hash_idx, stat, key) \
rsa_decrypt_key_ex(in, inlen, out, outlen, lparam, lparamlen, hash_idx, LTC_PKCS_1_OAEP, stat, key)
#define rsa_sign_hash(in, inlen, out, outlen, prng, prng_idx, hash_idx, saltlen, key) \
rsa_sign_hash_ex(in, inlen, out, outlen, LTC_PKCS_1_PSS, prng, prng_idx, hash_idx, saltlen, key)
#define rsa_verify_hash(sig, siglen, hash, hashlen, hash_idx, saltlen, stat, key) \
rsa_verify_hash_ex(sig, siglen, hash, hashlen, LTC_PKCS_1_PSS, hash_idx, saltlen, stat, key)
#define rsa_sign_saltlen_get_max(hash_idx, key) \
rsa_sign_saltlen_get_max_ex(LTC_PKCS_1_PSS, hash_idx, key)
/* These can be switched between PKCS #1 v2.x and PKCS #1 v1.5 paddings */
int rsa_encrypt_key_ex(const unsigned char *in, unsigned long inlen,
unsigned char *out, unsigned long *outlen,
const unsigned char *lparam, unsigned long lparamlen,
prng_state *prng, int prng_idx,
int hash_idx, int padding,
const rsa_key *key);
int rsa_decrypt_key_ex(const unsigned char *in, unsigned long inlen,
unsigned char *out, unsigned long *outlen,
const unsigned char *lparam, unsigned long lparamlen,
int hash_idx, int padding,
int *stat, const rsa_key *key);
int rsa_sign_hash_ex(const unsigned char *in, unsigned long inlen,
unsigned char *out, unsigned long *outlen,
int padding,
prng_state *prng, int prng_idx,
int hash_idx, unsigned long saltlen,
const rsa_key *key);
int rsa_verify_hash_ex(const unsigned char *sig, unsigned long siglen,
const unsigned char *hash, unsigned long hashlen,
int padding,
int hash_idx, unsigned long saltlen,
int *stat, const rsa_key *key);
int rsa_sign_saltlen_get_max_ex(int padding, int hash_idx, const rsa_key *key);
/* PKCS #1 import/export */
int rsa_export(unsigned char *out, unsigned long *outlen, int type, const rsa_key *key);
int rsa_import(const unsigned char *in, unsigned long inlen, rsa_key *key);
int rsa_import_x509(const unsigned char *in, unsigned long inlen, rsa_key *key);
int rsa_import_pkcs8(const unsigned char *in, unsigned long inlen,
const void *passwd, unsigned long passwdlen, rsa_key *key);
int rsa_set_key(const unsigned char *N, unsigned long Nlen,
const unsigned char *e, unsigned long elen,
const unsigned char *d, unsigned long dlen,
rsa_key *key);
int rsa_set_factors(const unsigned char *p, unsigned long plen,
const unsigned char *q, unsigned long qlen,
rsa_key *key);
int rsa_set_crt_params(const unsigned char *dP, unsigned long dPlen,
const unsigned char *dQ, unsigned long dQlen,
const unsigned char *qP, unsigned long qPlen,
rsa_key *key);
#endif
/* ---- DH Routines ---- */
#ifdef LTC_MDH
typedef struct {
int type;
void *x;
void *y;
void *base;
void *prime;
} dh_key;
int dh_get_groupsize(const dh_key *key);
int dh_export(unsigned char *out, unsigned long *outlen, int type, const dh_key *key);
int dh_import(const unsigned char *in, unsigned long inlen, dh_key *key);
int dh_set_pg(const unsigned char *p, unsigned long plen,
const unsigned char *g, unsigned long glen,
dh_key *key);
int dh_set_pg_dhparam(const unsigned char *dhparam, unsigned long dhparamlen, dh_key *key);
int dh_set_pg_groupsize(int groupsize, dh_key *key);
int dh_set_key(const unsigned char *in, unsigned long inlen, int type, dh_key *key);
int dh_generate_key(prng_state *prng, int wprng, dh_key *key);
int dh_shared_secret(const dh_key *private_key, const dh_key *public_key,
unsigned char *out, unsigned long *outlen);
void dh_free(dh_key *key);
int dh_export_key(void *out, unsigned long *outlen, int type, const dh_key *key);
#endif /* LTC_MDH */
/* ---- ECC Routines ---- */
#ifdef LTC_MECC
/* size of our temp buffers for exported keys */
#define ECC_BUF_SIZE 256
/* max private key size */
#define ECC_MAXSIZE 66
/** Structure defines a GF(p) curve */
typedef struct {
/** The prime that defines the field the curve is in (encoded in hex) */
const char *prime;
/** The fields A param (hex) */
const char *A;
/** The fields B param (hex) */
const char *B;
/** The order of the curve (hex) */
const char *order;
/** The x co-ordinate of the base point on the curve (hex) */
const char *Gx;
/** The y co-ordinate of the base point on the curve (hex) */
const char *Gy;
/** The co-factor */
unsigned long cofactor;
/** The OID */
const char *OID;
} ltc_ecc_curve;
/** A point on a ECC curve, stored in Jacbobian format such that (x,y,z) => (x/z^2, y/z^3, 1) when interpretted as affine */
typedef struct {
/** The x co-ordinate */
void *x;
/** The y co-ordinate */
void *y;
/** The z co-ordinate */
void *z;
} ecc_point;
/** ECC key's domain parameters */
typedef struct {
/** The size of the curve in octets */
int size;
/** The prime that defines the field the curve is in */
void *prime;
/** The fields A param */
void *A;
/** The fields B param */
void *B;
/** The order of the curve */
void *order;
/** The base point G on the curve */
ecc_point base;
/** The co-factor */
unsigned long cofactor;
/** The OID */
unsigned long oid[16];
unsigned long oidlen;
} ltc_ecc_dp;
/** An ECC key */
typedef struct {
/** Type of key, PK_PRIVATE or PK_PUBLIC */
int type;
/** Structure with domain parameters */
ltc_ecc_dp dp;
/** Structure with the public key */
ecc_point pubkey;
/** The private key */
void *k;
} ecc_key;
/** Formats of ECC signatures */
typedef enum ecc_signature_type_ {
/* ASN.1 encoded, ANSI X9.62 */
LTC_ECCSIG_ANSIX962 = 0x0,
/* raw R, S values */
LTC_ECCSIG_RFC7518 = 0x1,
/* raw R, S, V (+27) values */
LTC_ECCSIG_ETH27 = 0x2,
/* SSH + ECDSA signature format defined by RFC5656 */
LTC_ECCSIG_RFC5656 = 0x3,
} ecc_signature_type;
/** the ECC params provided */
extern const ltc_ecc_curve ltc_ecc_curves[];
void ecc_sizes(int *low, int *high);
int ecc_get_size(const ecc_key *key);
int ecc_find_curve(const char* name_or_oid, const ltc_ecc_curve** cu);
int ecc_set_curve(const ltc_ecc_curve *cu, ecc_key *key);
int ecc_generate_key(prng_state *prng, int wprng, ecc_key *key);
int ecc_set_key(const unsigned char *in, unsigned long inlen, int type, ecc_key *key);
int ecc_get_key(unsigned char *out, unsigned long *outlen, int type, const ecc_key *key);
int ecc_get_oid_str(char *out, unsigned long *outlen, const ecc_key *key);
int ecc_make_key(prng_state *prng, int wprng, int keysize, ecc_key *key);
int ecc_make_key_ex(prng_state *prng, int wprng, ecc_key *key, const ltc_ecc_curve *cu);
void ecc_free(ecc_key *key);
int ecc_export(unsigned char *out, unsigned long *outlen, int type, const ecc_key *key);
int ecc_import(const unsigned char *in, unsigned long inlen, ecc_key *key);
int ecc_import_ex(const unsigned char *in, unsigned long inlen, ecc_key *key, const ltc_ecc_curve *cu);
int ecc_ansi_x963_export(const ecc_key *key, unsigned char *out, unsigned long *outlen);
int ecc_ansi_x963_import(const unsigned char *in, unsigned long inlen, ecc_key *key);
int ecc_ansi_x963_import_ex(const unsigned char *in, unsigned long inlen, ecc_key *key, const ltc_ecc_curve *cu);
int ecc_export_openssl(unsigned char *out, unsigned long *outlen, int type, const ecc_key *key);
int ecc_import_openssl(const unsigned char *in, unsigned long inlen, ecc_key *key);
int ecc_import_pkcs8(const unsigned char *in, unsigned long inlen, const void *pwd, unsigned long pwdlen, ecc_key *key);
int ecc_import_x509(const unsigned char *in, unsigned long inlen, ecc_key *key);
int ecc_shared_secret(const ecc_key *private_key, const ecc_key *public_key,
unsigned char *out, unsigned long *outlen);
int ecc_encrypt_key(const unsigned char *in, unsigned long inlen,
unsigned char *out, unsigned long *outlen,
prng_state *prng, int wprng, int hash,
const ecc_key *key);
int ecc_decrypt_key(const unsigned char *in, unsigned long inlen,
unsigned char *out, unsigned long *outlen,
const ecc_key *key);
#define ecc_sign_hash_rfc7518(in_, inlen_, out_, outlen_, prng_, wprng_, key_) \
ecc_sign_hash_ex(in_, inlen_, out_, outlen_, prng_, wprng_, LTC_ECCSIG_RFC7518, NULL, key_)
#define ecc_sign_hash(in_, inlen_, out_, outlen_, prng_, wprng_, key_) \
ecc_sign_hash_ex(in_, inlen_, out_, outlen_, prng_, wprng_, LTC_ECCSIG_ANSIX962, NULL, key_)
#define ecc_verify_hash_rfc7518(sig_, siglen_, hash_, hashlen_, stat_, key_) \
ecc_verify_hash_ex(sig_, siglen_, hash_, hashlen_, LTC_ECCSIG_RFC7518, stat_, key_)
#define ecc_verify_hash(sig_, siglen_, hash_, hashlen_, stat_, key_) \
ecc_verify_hash_ex(sig_, siglen_, hash_, hashlen_, LTC_ECCSIG_ANSIX962, stat_, key_)
int ecc_sign_hash_ex(const unsigned char *in, unsigned long inlen,
unsigned char *out, unsigned long *outlen,
prng_state *prng, int wprng, ecc_signature_type sigformat,
int *recid, const ecc_key *key);
int ecc_verify_hash_ex(const unsigned char *sig, unsigned long siglen,
const unsigned char *hash, unsigned long hashlen,
ecc_signature_type sigformat, int *stat, const ecc_key *key);
int ecc_recover_key(const unsigned char *sig, unsigned long siglen,
const unsigned char *hash, unsigned long hashlen,
int recid, ecc_signature_type sigformat, ecc_key *key);
#endif
#ifdef LTC_CURVE25519
typedef struct {
/** The key type, PK_PRIVATE or PK_PUBLIC */
enum public_key_type type;
/** The PK-algorithm, PKA_ED25519 or PKA_X25519 */
/** This was supposed to be:
* enum public_key_algorithms algo;
* but that enum is now in tomcrypt_private.h
*/
int algo;
/** The private key */
unsigned char priv[32];
/** The public key */
unsigned char pub[32];
} curve25519_key;
/** Ed25519 Signature API */
int ed25519_make_key(prng_state *prng, int wprng, curve25519_key *key);
int ed25519_export( unsigned char *out, unsigned long *outlen,
int which,
const curve25519_key *key);
int ed25519_import(const unsigned char *in, unsigned long inlen, curve25519_key *key);
int ed25519_import_raw(const unsigned char *in, unsigned long inlen, int which, curve25519_key *key);
int ed25519_import_x509(const unsigned char *in, unsigned long inlen, curve25519_key *key);
int ed25519_import_pkcs8(const unsigned char *in, unsigned long inlen,
const void *pwd, unsigned long pwdlen,
curve25519_key *key);
int ed25519_sign(const unsigned char *msg, unsigned long msglen,
unsigned char *sig, unsigned long *siglen,
const curve25519_key *private_key);
int ed25519_verify(const unsigned char *msg, unsigned long msglen,
const unsigned char *sig, unsigned long siglen,
int *stat, const curve25519_key *public_key);
/** X25519 Key-Exchange API */
int x25519_make_key(prng_state *prng, int wprng, curve25519_key *key);
int x25519_export( unsigned char *out, unsigned long *outlen,
int which,
const curve25519_key *key);
int x25519_import(const unsigned char *in, unsigned long inlen, curve25519_key *key);
int x25519_import_raw(const unsigned char *in, unsigned long inlen, int which, curve25519_key *key);
int x25519_import_x509(const unsigned char *in, unsigned long inlen, curve25519_key *key);
int x25519_import_pkcs8(const unsigned char *in, unsigned long inlen,
const void *pwd, unsigned long pwdlen,
curve25519_key *key);
int x25519_shared_secret(const curve25519_key *private_key,
const curve25519_key *public_key,
unsigned char *out, unsigned long *outlen);
#endif /* LTC_CURVE25519 */
#ifdef LTC_MDSA
/* Max diff between group and modulus size in bytes (max case: L=8192bits, N=256bits) */
#define LTC_MDSA_DELTA 992
/* Max DSA group size in bytes */
#define LTC_MDSA_MAX_GROUP 64
/* Max DSA modulus size in bytes (the actual DSA size, max 8192 bits) */
#define LTC_MDSA_MAX_MODULUS 1024
/** DSA key structure */
typedef struct {
/** The key type, PK_PRIVATE or PK_PUBLIC */
int type;
/** The order of the sub-group used in octets */
int qord;
/** The generator */
void *g;
/** The prime used to generate the sub-group */
void *q;
/** The large prime that generats the field the contains the sub-group */
void *p;
/** The private key */
void *x;
/** The public key */
void *y;
} dsa_key;
int dsa_make_key(prng_state *prng, int wprng, int group_size, int modulus_size, dsa_key *key);
int dsa_set_pqg(const unsigned char *p, unsigned long plen,
const unsigned char *q, unsigned long qlen,
const unsigned char *g, unsigned long glen,
dsa_key *key);
int dsa_set_pqg_dsaparam(const unsigned char *dsaparam, unsigned long dsaparamlen, dsa_key *key);
int dsa_generate_pqg(prng_state *prng, int wprng, int group_size, int modulus_size, dsa_key *key);
int dsa_set_key(const unsigned char *in, unsigned long inlen, int type, dsa_key *key);
int dsa_generate_key(prng_state *prng, int wprng, dsa_key *key);
void dsa_free(dsa_key *key);
int dsa_sign_hash_raw(const unsigned char *in, unsigned long inlen,
void *r, void *s,
prng_state *prng, int wprng, const dsa_key *key);
int dsa_sign_hash(const unsigned char *in, unsigned long inlen,
unsigned char *out, unsigned long *outlen,
prng_state *prng, int wprng, const dsa_key *key);
int dsa_verify_hash_raw( void *r, void *s,
const unsigned char *hash, unsigned long hashlen,
int *stat, const dsa_key *key);
int dsa_verify_hash(const unsigned char *sig, unsigned long siglen,
const unsigned char *hash, unsigned long hashlen,
int *stat, const dsa_key *key);
int dsa_encrypt_key(const unsigned char *in, unsigned long inlen,
unsigned char *out, unsigned long *outlen,
prng_state *prng, int wprng, int hash,
const dsa_key *key);
int dsa_decrypt_key(const unsigned char *in, unsigned long inlen,
unsigned char *out, unsigned long *outlen,
const dsa_key *key);
int dsa_import(const unsigned char *in, unsigned long inlen, dsa_key *key);
int dsa_export(unsigned char *out, unsigned long *outlen, int type, const dsa_key *key);
int dsa_verify_key(const dsa_key *key, int *stat);
int dsa_shared_secret(void *private_key, void *base,
const dsa_key *public_key,
unsigned char *out, unsigned long *outlen);
#endif /* LTC_MDSA */
#ifdef LTC_DER
/* DER handling */
typedef enum ltc_asn1_type_ {
/* 0 */
LTC_ASN1_EOL,
LTC_ASN1_BOOLEAN,
LTC_ASN1_INTEGER,
LTC_ASN1_SHORT_INTEGER,
LTC_ASN1_BIT_STRING,
/* 5 */
LTC_ASN1_OCTET_STRING,
LTC_ASN1_NULL,
LTC_ASN1_OBJECT_IDENTIFIER,
LTC_ASN1_IA5_STRING,
LTC_ASN1_PRINTABLE_STRING,
/* 10 */
LTC_ASN1_UTF8_STRING,
LTC_ASN1_UTCTIME,
LTC_ASN1_CHOICE,
LTC_ASN1_SEQUENCE,
LTC_ASN1_SET,
/* 15 */
LTC_ASN1_SETOF,
LTC_ASN1_RAW_BIT_STRING,
LTC_ASN1_TELETEX_STRING,
LTC_ASN1_GENERALIZEDTIME,
LTC_ASN1_CUSTOM_TYPE,
} ltc_asn1_type;
typedef enum {
LTC_ASN1_CL_UNIVERSAL = 0x0,
LTC_ASN1_CL_APPLICATION = 0x1,
LTC_ASN1_CL_CONTEXT_SPECIFIC = 0x2,
LTC_ASN1_CL_PRIVATE = 0x3,
} ltc_asn1_class;
typedef enum {
LTC_ASN1_PC_PRIMITIVE = 0x0,
LTC_ASN1_PC_CONSTRUCTED = 0x1,
} ltc_asn1_pc;
/** A LTC ASN.1 list type */
typedef struct ltc_asn1_list_ {
/** The LTC ASN.1 enumerated type identifier */
ltc_asn1_type type;
/** The data to encode or place for decoding */
void *data;
/** The size of the input or resulting output */
unsigned long size;
/** The used flag
* 1. This is used by the CHOICE ASN.1 type to indicate which choice was made
* 2. This is used by the ASN.1 decoder to indicate if an element is used
* 3. This is used by the flexi-decoder to indicate the first byte of the identifier */
int used;
/** Flag used to indicate optional items in ASN.1 sequences */
int optional;
/** ASN.1 identifier */
ltc_asn1_class klass;
ltc_asn1_pc pc;
ulong64 tag;
/** prev/next entry in the list */
struct ltc_asn1_list_ *prev, *next, *child, *parent;
} ltc_asn1_list;
#define LTC_SET_ASN1(list, index, Type, Data, Size) \
do { \
int LTC_MACRO_temp = (index); \
ltc_asn1_list *LTC_MACRO_list = (list); \
LTC_MACRO_list[LTC_MACRO_temp].type = (Type); \
LTC_MACRO_list[LTC_MACRO_temp].data = (void*)(Data); \
LTC_MACRO_list[LTC_MACRO_temp].size = (Size); \
LTC_MACRO_list[LTC_MACRO_temp].used = 0; \
LTC_MACRO_list[LTC_MACRO_temp].optional = 0; \
LTC_MACRO_list[LTC_MACRO_temp].klass = 0; \
LTC_MACRO_list[LTC_MACRO_temp].pc = 0; \
LTC_MACRO_list[LTC_MACRO_temp].tag = 0; \
} while (0)
#define LTC_SET_ASN1_IDENTIFIER(list, index, Class, Pc, Tag) \
do { \
int LTC_MACRO_temp = (index); \
ltc_asn1_list *LTC_MACRO_list = (list); \
LTC_MACRO_list[LTC_MACRO_temp].type = LTC_ASN1_CUSTOM_TYPE; \
LTC_MACRO_list[LTC_MACRO_temp].klass = (Class); \
LTC_MACRO_list[LTC_MACRO_temp].pc = (Pc); \
LTC_MACRO_list[LTC_MACRO_temp].tag = (Tag); \
} while (0)
#define LTC_SET_ASN1_CUSTOM_CONSTRUCTED(list, index, Class, Tag, Data) \
do { \
int LTC_MACRO_temp##__LINE__ = (index); \
LTC_SET_ASN1(list, LTC_MACRO_temp##__LINE__, LTC_ASN1_CUSTOM_TYPE, Data, 1); \
LTC_SET_ASN1_IDENTIFIER(list, LTC_MACRO_temp##__LINE__, Class, LTC_ASN1_PC_CONSTRUCTED, Tag); \
} while (0)
#define LTC_SET_ASN1_CUSTOM_PRIMITIVE(list, index, Class, Tag, Type, Data, Size) \
do { \
int LTC_MACRO_temp##__LINE__ = (index); \
LTC_SET_ASN1(list, LTC_MACRO_temp##__LINE__, LTC_ASN1_CUSTOM_TYPE, Data, Size); \
LTC_SET_ASN1_IDENTIFIER(list, LTC_MACRO_temp##__LINE__, Class, LTC_ASN1_PC_PRIMITIVE, Tag); \
list[LTC_MACRO_temp##__LINE__].used = (int)(Type); \
} while (0)
extern const char* der_asn1_class_to_string_map[];
extern const unsigned long der_asn1_class_to_string_map_sz;
extern const char* der_asn1_pc_to_string_map[];
extern const unsigned long der_asn1_pc_to_string_map_sz;
extern const char* der_asn1_tag_to_string_map[];
extern const unsigned long der_asn1_tag_to_string_map_sz;
/* SEQUENCE */
int der_encode_sequence_ex(const ltc_asn1_list *list, unsigned long inlen,
unsigned char *out, unsigned long *outlen, int type_of);
#define der_encode_sequence(list, inlen, out, outlen) der_encode_sequence_ex(list, inlen, out, outlen, LTC_ASN1_SEQUENCE)
/** The supported bitmap for all the
* decoders with a `flags` argument.
*/
enum ltc_der_seq {
LTC_DER_SEQ_ZERO = 0x0u,
/** Bit0 - [0]=Unordered (SET or SETOF)
* [1]=Ordered (SEQUENCE) */
LTC_DER_SEQ_UNORDERED = LTC_DER_SEQ_ZERO,
LTC_DER_SEQ_ORDERED = 0x1u,
/** Bit1 - [0]=Relaxed
* [1]=Strict */
LTC_DER_SEQ_RELAXED = LTC_DER_SEQ_ZERO,
LTC_DER_SEQ_STRICT = 0x2u,
/** Alternative naming */
LTC_DER_SEQ_SET = LTC_DER_SEQ_UNORDERED,
LTC_DER_SEQ_SEQUENCE = LTC_DER_SEQ_ORDERED,
};
int der_decode_sequence_ex(const unsigned char *in, unsigned long inlen,
ltc_asn1_list *list, unsigned long outlen, unsigned int flags);
#define der_decode_sequence(in, inlen, list, outlen) der_decode_sequence_ex(in, inlen, list, outlen, LTC_DER_SEQ_SEQUENCE | LTC_DER_SEQ_RELAXED)
#define der_decode_sequence_strict(in, inlen, list, outlen) der_decode_sequence_ex(in, inlen, list, outlen, LTC_DER_SEQ_SEQUENCE | LTC_DER_SEQ_STRICT)
int der_length_sequence(const ltc_asn1_list *list, unsigned long inlen,
unsigned long *outlen);
/* Custom-types */
int der_encode_custom_type(const ltc_asn1_list *root,
unsigned char *out, unsigned long *outlen);
int der_decode_custom_type(const unsigned char *in, unsigned long inlen,
ltc_asn1_list *root);
int der_length_custom_type(const ltc_asn1_list *root,
unsigned long *outlen,
unsigned long *payloadlen);
/* SET */
#define der_decode_set(in, inlen, list, outlen) der_decode_sequence_ex(in, inlen, list, outlen, LTC_DER_SEQ_SET)
#define der_length_set der_length_sequence
int der_encode_set(const ltc_asn1_list *list, unsigned long inlen,
unsigned char *out, unsigned long *outlen);
int der_encode_setof(const ltc_asn1_list *list, unsigned long inlen,
unsigned char *out, unsigned long *outlen);
/* VA list handy helpers with triplets of <type, size, data> */
int der_encode_sequence_multi(unsigned char *out, unsigned long *outlen, ...);
int der_decode_sequence_multi(const unsigned char *in, unsigned long inlen, ...);
/* FLEXI DECODER handle unknown list decoder */
int der_decode_sequence_flexi(const unsigned char *in, unsigned long *inlen, ltc_asn1_list **out);
#define der_free_sequence_flexi der_sequence_free
void der_sequence_free(ltc_asn1_list *in);
void der_sequence_shrink(ltc_asn1_list *in);
/* BOOLEAN */
int der_length_boolean(unsigned long *outlen);
int der_encode_boolean(int in,
unsigned char *out, unsigned long *outlen);
int der_decode_boolean(const unsigned char *in, unsigned long inlen,
int *out);
/* INTEGER */
int der_encode_integer(void *num, unsigned char *out, unsigned long *outlen);
int der_decode_integer(const unsigned char *in, unsigned long inlen, void *num);
int der_length_integer(void *num, unsigned long *outlen);
/* INTEGER -- handy for 0..2^32-1 values */
int der_decode_short_integer(const unsigned char *in, unsigned long inlen, unsigned long *num);
int der_encode_short_integer(unsigned long num, unsigned char *out, unsigned long *outlen);
int der_length_short_integer(unsigned long num, unsigned long *outlen);
/* BIT STRING */
int der_encode_bit_string(const unsigned char *in, unsigned long inlen,
unsigned char *out, unsigned long *outlen);
int der_decode_bit_string(const unsigned char *in, unsigned long inlen,
unsigned char *out, unsigned long *outlen);
int der_encode_raw_bit_string(const unsigned char *in, unsigned long inlen,
unsigned char *out, unsigned long *outlen);
int der_decode_raw_bit_string(const unsigned char *in, unsigned long inlen,
unsigned char *out, unsigned long *outlen);
int der_length_bit_string(unsigned long nbits, unsigned long *outlen);
/* OCTET STRING */
int der_encode_octet_string(const unsigned char *in, unsigned long inlen,
unsigned char *out, unsigned long *outlen);
int der_decode_octet_string(const unsigned char *in, unsigned long inlen,
unsigned char *out, unsigned long *outlen);
int der_length_octet_string(unsigned long noctets, unsigned long *outlen);
/* OBJECT IDENTIFIER */
int der_encode_object_identifier(const unsigned long *words, unsigned long nwords,
unsigned char *out, unsigned long *outlen);
int der_decode_object_identifier(const unsigned char *in, unsigned long inlen,
unsigned long *words, unsigned long *outlen);
int der_length_object_identifier(const unsigned long *words, unsigned long nwords, unsigned long *outlen);
unsigned long der_object_identifier_bits(unsigned long x);
/* IA5 STRING */
int der_encode_ia5_string(const unsigned char *in, unsigned long inlen,
unsigned char *out, unsigned long *outlen);
int der_decode_ia5_string(const unsigned char *in, unsigned long inlen,
unsigned char *out, unsigned long *outlen);
int der_length_ia5_string(const unsigned char *octets, unsigned long noctets, unsigned long *outlen);
int der_ia5_char_encode(int c);
int der_ia5_value_decode(int v);
/* TELETEX STRING */
int der_decode_teletex_string(const unsigned char *in, unsigned long inlen,
unsigned char *out, unsigned long *outlen);
int der_length_teletex_string(const unsigned char *octets, unsigned long noctets, unsigned long *outlen);
/* PRINTABLE STRING */
int der_encode_printable_string(const unsigned char *in, unsigned long inlen,
unsigned char *out, unsigned long *outlen);
int der_decode_printable_string(const unsigned char *in, unsigned long inlen,
unsigned char *out, unsigned long *outlen);
int der_length_printable_string(const unsigned char *octets, unsigned long noctets, unsigned long *outlen);
int der_printable_char_encode(int c);
int der_printable_value_decode(int v);
/* UTF-8 */
#if (defined(SIZE_MAX) || __STDC_VERSION__ >= 199901L || defined(WCHAR_MAX) || defined(__WCHAR_MAX__) || defined(_WCHAR_T) || defined(_WCHAR_T_DEFINED) || defined (__WCHAR_TYPE__)) && !defined(LTC_NO_WCHAR)
#if defined(__WCHAR_MAX__)
#define LTC_WCHAR_MAX __WCHAR_MAX__
#else
#include <wchar.h>
#define LTC_WCHAR_MAX WCHAR_MAX
#endif
/* please note that it might happen that LTC_WCHAR_MAX is undefined */
#else
typedef ulong32 wchar_t;
#define LTC_WCHAR_MAX 0xFFFFFFFF
#endif
int der_encode_utf8_string(const wchar_t *in, unsigned long inlen,
unsigned char *out, unsigned long *outlen);
int der_decode_utf8_string(const unsigned char *in, unsigned long inlen,
wchar_t *out, unsigned long *outlen);
unsigned long der_utf8_charsize(const wchar_t c);
int der_length_utf8_string(const wchar_t *in, unsigned long noctets, unsigned long *outlen);
/* CHOICE */
int der_decode_choice(const unsigned char *in, unsigned long *inlen,
ltc_asn1_list *list, unsigned long outlen);
/* UTCTime */
typedef struct {
unsigned YY, /* year */
MM, /* month */
DD, /* day */
hh, /* hour */
mm, /* minute */
ss, /* second */
off_dir, /* timezone offset direction 0 == +, 1 == - */
off_hh, /* timezone offset hours */
off_mm; /* timezone offset minutes */
} ltc_utctime;
int der_encode_utctime(const ltc_utctime *utctime,
unsigned char *out, unsigned long *outlen);
int der_decode_utctime(const unsigned char *in, unsigned long *inlen,
ltc_utctime *out);
int der_length_utctime(const ltc_utctime *utctime, unsigned long *outlen);
/* GeneralizedTime */
typedef struct {
unsigned YYYY, /* year */
MM, /* month */
DD, /* day */
hh, /* hour */
mm, /* minute */
ss, /* second */
fs, /* fractional seconds */
off_dir, /* timezone offset direction 0 == +, 1 == - */
off_hh, /* timezone offset hours */
off_mm; /* timezone offset minutes */
} ltc_generalizedtime;
int der_encode_generalizedtime(const ltc_generalizedtime *gtime,
unsigned char *out, unsigned long *outlen);
int der_decode_generalizedtime(const unsigned char *in, unsigned long *inlen,
ltc_generalizedtime *out);
int der_length_generalizedtime(const ltc_generalizedtime *gtime, unsigned long *outlen);
#endif