/* * Copyright 2014-2023 The GmSSL Project. All Rights Reserved. * * Licensed under the Apache License, Version 2.0 (the License); you may * not use this file except in compliance with the License. * * http://www.apache.org/licenses/LICENSE-2.0 */ #ifndef GMSSL_ASN1_H #define GMSSL_ASN1_H #include #include #include #if __cplusplus extern "C" { #endif #define ASN1_TAG_UNIVERSAL 0x00 #define ASN1_TAG_APPLICATION 0x40 #define ASN1_TAG_CONTENT_SPECIFIC 0x80 #define ASN1_TAG_PRIVATE 0xC0 #define ASN1_TAG_PRIMITIVE 0x00 #define ASN1_TAG_CONSTRUCTED 0x20 #define ASN1_TAG_IMPLICIT(index) (ASN1_TAG_CONTENT_SPECIFIC|(index)) #define ASN1_TAG_EXPLICIT(index) ASN1_TAG_IMPLICIT(ASN1_TAG_CONSTRUCTED|(index)) #define ASN1_FMT_FULL 0x01 enum ASN1_TAG { ASN1_TAG_BOOLEAN = 1, ASN1_TAG_INTEGER = 2, ASN1_TAG_BIT_STRING = 3, ASN1_TAG_OCTET_STRING = 4, ASN1_TAG_NULL = 5, ASN1_TAG_OBJECT_IDENTIFIER = 6, ASN1_TAG_ObjectDescriptor = 7, ASN1_TAG_EXTERNAL = 8, ASN1_TAG_REAL = 9, ASN1_TAG_ENUMERATED = 10, // 0x0A ASN1_TAG_EMBEDDED = 11, // 0x0B ASN1_TAG_UTF8String = 12, // 0x0C ASN1_TAG_RELATIVE_OID = 13, // 0x0D ASN1_TAG_NumericString = 18, // 0x12 ASN1_TAG_PrintableString = 19, // 0x13, printable subset of ascii ASN1_TAG_TeletexString = 20, // 0x14, T61String ASN1_TAG_VideotexString = 21, // 0x15 ASN1_TAG_IA5String = 22, // 0x16, 7-bit ascii ASN1_TAG_UTCTime = 23, // 0x17 ASN1_TAG_GeneralizedTime = 24, // 0x18 ASN1_TAG_GraphicString = 25, // 0x19 ASN1_TAG_VisibleString = 26, // 0x20 ASN1_TAG_GeneralString = 27, // 0x21 ASN1_TAG_UniversalString = 28, // 0x22 ASN1_TAG_CHARACTER_STRING = 29, // 0x23 ASN1_TAG_BMPString = 30, // 0x24, 2-byte unicode with zeros ASN1_TAG_SEQUENCE = 0x30, ASN1_TAG_SET = 0x31, ASN1_TAG_EXPLICIT = 0xa0, }; const char *asn1_tag_name(int tag); int asn1_tag_is_cstring(int tag); int asn1_tag_to_der(int tag, uint8_t **out, size_t *outlen); int asn1_tag_from_der(int *tag, const uint8_t **in, size_t *inlen); int asn1_tag_from_der_readonly(int *tag, const uint8_t **in, size_t *inlen); // read the next tag without changing *in,*inlen int asn1_length_to_der(size_t dlen, uint8_t **out, size_t *outlen); int asn1_length_from_der(size_t *dlen, const uint8_t **in, size_t *inlen); int asn1_length_is_zero(size_t len); int asn1_length_le(size_t len1, size_t len2); // less than int asn1_data_to_der(const uint8_t *d, size_t dlen, uint8_t **out, size_t *outlen); int asn1_data_from_der(const uint8_t **d, size_t dlen, const uint8_t **in, size_t *inlen); int asn1_type_to_der(int tag, const uint8_t *d, size_t dlen, uint8_t **out, size_t *outlen); int asn1_type_from_der(int tag, const uint8_t **d, size_t *dlen, const uint8_t **in, size_t *inlen); int asn1_nonempty_type_to_der(int tag, const uint8_t *d, size_t dlen, uint8_t **out, size_t *outlen); int asn1_nonempty_type_from_der(int tag, const uint8_t **d, size_t *dlen, const uint8_t **in, size_t *inlen); int asn1_any_type_from_der(int *tag, const uint8_t **d, size_t *dlen, const uint8_t **in, size_t *inlen); int asn1_any_to_der(const uint8_t *a, size_t alen, uint8_t **out, size_t *outlen); // 调用方应保证a,alen为TLV int asn1_any_from_der(const uint8_t **a, size_t *alen, const uint8_t **in, size_t *inlen); // 该函数会检查输入是否为TLV #define ASN1_TRUE 0xff #define ASN1_FALSE 0x00 const char *asn1_boolean_name(int val); int asn1_boolean_from_name(int *val, const char *name); int asn1_boolean_to_der_ex(int tag, int val, uint8_t **out, size_t *outlen); int asn1_boolean_from_der_ex(int tag, int *val, const uint8_t **in, size_t *inlen); #define asn1_boolean_to_der(val,out,outlen) asn1_boolean_to_der_ex(ASN1_TAG_BOOLEAN,val,out,outlen) #define asn1_boolean_from_der(val,in,inlen) asn1_boolean_from_der_ex(ASN1_TAG_BOOLEAN,val,in,inlen) #define asn1_implicit_boolean_to_der(i,val,out,outlen) asn1_boolean_to_der_ex(ASN1_TAG_IMPLICIT(i),val,out,outlen) #define asn1_implicit_boolean_from_der(i,val,in,inlen) asn1_boolean_from_der_ex(ASN1_TAG_IMPLICIT(i),val,in,inlen) // asn1_integer_ 不支持负数编解码 int asn1_integer_to_der_ex(int tag, const uint8_t *d, size_t dlen, uint8_t **out, size_t *outlen); int asn1_integer_from_der_ex(int tag, const uint8_t **d, size_t *dlen, const uint8_t **in, size_t *inlen); #define asn1_integer_to_der(d,dlen,out,outlen) asn1_integer_to_der_ex(ASN1_TAG_INTEGER,d,dlen,out,outlen) #define asn1_integer_from_der(d,dlen,in,inlen) asn1_integer_from_der_ex(ASN1_TAG_INTEGER,d,dlen,in,inlen) #define asn1_implicit_integer_to_der(i,d,dlen,out,outlen) asn1_integer_to_der_ex(ASN1_TAG_IMPLICIT(i),d,dlen,out,outlen) #define asn1_implicit_integer_from_der(i,d,dlen,in,inlen) asn1_integer_from_der_ex(ASN1_TAG_IMPLICIT(i),d,dlen,in,inlen) // asn1_int_ 只支持小的无符号整数的编解码，不支持负数 int asn1_int_to_der_ex(int tag, int val, uint8_t **out, size_t *outlen); // 当 val == -1 时，不输出，返回 0 int asn1_int_from_der_ex(int tag, int *val, const uint8_t **in, size_t *inlen); // 不支持负数，返回0时 *val 设置为 -1 #define asn1_int_to_der(val,out,outlen) asn1_int_to_der_ex(ASN1_TAG_INTEGER,val,out,outlen) #define asn1_int_from_der(val,in,inlen) asn1_int_from_der_ex(ASN1_TAG_INTEGER,val,in,inlen) #define asn1_implicit_int_to_der(i,val,out,outlen) asn1_int_to_der_ex(ASN1_TAG_IMPLICIT(i),val,out,outlen) #define asn1_implicit_int_from_der(i,val,in,inlen) asn1_int_from_der_ex(ASN1_TAG_IMPLICIT(i),val,in,inlen) // 比特长度不必须为8的整数倍 int asn1_bit_string_to_der_ex(int tag, const uint8_t *d, size_t nbits, uint8_t **out, size_t *outlen); int asn1_bit_string_from_der_ex(int tag, const uint8_t **d, size_t *nbits, const uint8_t **in, size_t *inlen); #define asn1_bit_string_to_der(d,nbits,out,outlen) asn1_bit_string_to_der_ex(ASN1_TAG_BIT_STRING,d,nbits,out,outlen) #define asn1_bit_string_from_der(d,nbits,in,inlen) asn1_bit_string_from_der_ex(ASN1_TAG_BIT_STRING,d,nbits,in,inlen) #define asn1_implicit_bit_string_to_der(i,d,nbits,out,outlen) asn1_bit_string_to_der_ex(ASN1_TAG_IMPLICIT(i),d,nbits,out,outlen) #define asn1_implicit_bit_string_from_der(i,d,nbits,in,inlen) asn1_bit_string_from_der_ex(ASN1_TAG_IMPLICIT(i),d,nbits,in,inlen) // 比特长度必须为8的整数倍，因此使用字节长度 int asn1_bit_octets_to_der_ex(int tag, const uint8_t *d, size_t dlen, uint8_t **out, size_t *outlen); int asn1_bit_octets_from_der_ex(int tag, const uint8_t **d, size_t *dlen, const uint8_t **in, size_t *inlen); #define asn1_bit_octets_to_der(d,dlen,out,outlen) asn1_bit_octets_to_der_ex(ASN1_TAG_BIT_STRING,d,dlen,out,outlen) #define asn1_bit_octets_from_der(d,dlen,in,inlen) asn1_bit_octets_from_der_ex(ASN1_TAG_BIT_STRING,d,dlen,in,inlen) #define asn1_implicit_bit_octets_to_der(i,d,dlen,out,outlen) asn1_bit_octets_to_der_ex(ASN1_TAG_IMPLICIT(i),d,dlen,out,outlen) #define asn1_implicit_bit_octets_from_der(i,d,dlen,in,inlen) asn1_bit_octets_from_der_ex(ASN1_TAG_IMPLICIT(i),d,dlen,in,inlen) // bits == -1 不编码，只支持较少的比特数量 int asn1_bits_to_der_ex(int tag, int bits, uint8_t **out, size_t *outlen); int asn1_bits_from_der_ex(int tag, int *bits, const uint8_t **in, size_t *inlen); #define asn1_bits_to_der(bits,out,outlen) asn1_bits_to_der_ex(ASN1_TAG_BIT_STRING,bits,out,outlen) #define asn1_bits_from_der(bits,in,inlen) asn1_bits_from_der_ex(ASN1_TAG_BIT_STRING,bits,in,inlen) #define asn1_implicit_bits_to_der(i,bits,out,outlen) asn1_bits_to_der_ex(ASN1_TAG_IMPLICIT(i),bits,out,outlen) #define asn1_implicit_bits_from_der(i,bits,in,inlen) asn1_bits_from_der_ex(ASN1_TAG_IMPLICIT(i),bits,in,inlen) // names[i]对应第i个比特 int asn1_bits_print(FILE *fp, int fmt, int ind, const char *label, const char **names, size_t names_cnt, int bits); #define asn1_octet_string_to_der_ex(tag,d,dlen,out,outlen) asn1_type_to_der(tag,d,dlen,out,outlen) #define asn1_octet_string_from_der_ex(tag,d,dlen,in,inlen) asn1_type_from_der(tag,d,dlen,in,inlen) #define asn1_octet_string_to_der(d,dlen,out,outlen) asn1_type_to_der(ASN1_TAG_OCTET_STRING,d,dlen,out,outlen) #define asn1_octet_string_from_der(d,dlen,in,inlen) asn1_type_from_der(ASN1_TAG_OCTET_STRING,d,dlen,in,inlen) #define asn1_implicit_octet_string_to_der(i,d,dlen,out,outlen) asn1_type_to_der(ASN1_TAG_IMPLICIT(i),d,dlen,out,outlen) #define asn1_implicit_octet_string_from_der(i,d,dlen,in,inlen) asn1_type_from_der(ASN1_TAG_IMPLICIT(i),d,dlen,in,inlen) const char *asn1_null_name(void); int asn1_null_to_der(uint8_t **out, size_t *outlen); int asn1_null_from_der(const uint8_t **in, size_t *inlen); #define ASN1_OID_MIN_NODES 2 #define ASN1_OID_MAX_NODES 32 #define ASN1_OID_MIN_OCTETS 1 #define ASN1_OID_MAX_OCTETS (1 + (ASN1_OID_MAX_NODES - 2) * 5) int asn1_object_identifier_to_octets(const uint32_t *nodes, size_t nodes_cnt, uint8_t *out, size_t *outlen); int asn1_object_identifier_from_octets(uint32_t *nodes, size_t *nodes_cnt, const uint8_t *in, size_t inlen); int asn1_object_identifier_to_der_ex(int tag, const uint32_t *nodes, size_t nodes_cnt, uint8_t **out, size_t *outlen); int asn1_object_identifier_from_der_ex(int tag, uint32_t *nodes, size_t *nodes_cnt, const uint8_t **in, size_t *inlen); #define asn1_object_identifier_to_der(nodes,nodes_cnt,out,outlen) asn1_object_identifier_to_der_ex(ASN1_TAG_OBJECT_IDENTIFIER,nodes,nodes_cnt,out,outlen) #define asn1_object_identifier_from_der(nodes,nodes_cnt,in,inlen) asn1_object_identifier_from_der_ex(ASN1_TAG_OBJECT_IDENTIFIER,nodes,nodes_cnt,in,inlen) #define asn1_implicit_object_identifier_to_der(i,nodes,nodes_cnt,out,outlen) asn1_object_identifier_to_der_ex(ASN1_TAG_IMPLICIT(i),nodes,nodes_cnt,out,outlen) #define asn1_implicit_object_identifier_from_der(i,nodes,nodes_cnt,in,inlen) asn1_object_identifier_from_der_ex(ASN1_TAG_IMPLICIT(i),nodes,nodes_cnt,in,inlen) int asn1_object_identifier_equ(const uint32_t *a, size_t a_cnt, const uint32_t *b, size_t b_cnt); int asn1_object_identifier_print(FILE *fp, int fmt, int ind, const char *label, const char *name, const uint32_t *nodes, size_t nodes_cnt); typedef struct { int oid; char *name; uint32_t *nodes; size_t nodes_cnt; int flags; char *description; } ASN1_OID_INFO; const ASN1_OID_INFO *asn1_oid_info_from_name(const ASN1_OID_INFO *infos, size_t count, const char *name); const ASN1_OID_INFO *asn1_oid_info_from_oid(const ASN1_OID_INFO *infos, size_t count, int oid); // 如果一个正确解析的OID并不在infos列表中，那么仍然返回1，但是调用方必须检查返回的info是否为空 int asn1_oid_info_from_der_ex(const ASN1_OID_INFO **info, uint32_t *nodes, size_t *nodes_cnt, const ASN1_OID_INFO *infos, size_t count, const uint8_t **in, size_t *inlen); int asn1_oid_info_from_der(const ASN1_OID_INFO **info, const ASN1_OID_INFO *infos, size_t count, const uint8_t **in, size_t *inlen); #define asn1_enumerated_to_der_ex(tag,val,out,outlen) asn1_int_to_der_ex(tag,val,out,outlen) #define asn1_enumerated_from_der_ex(tag,val,in,inlen) asn1_int_from_der_ex(tag,val,in,inlen) #define asn1_enumerated_to_der(val,out,outlen) asn1_int_to_der_ex(ASN1_TAG_ENUMERATED,val,out,outlen) #define asn1_enumerated_from_der(val,in,inlen) asn1_int_from_der_ex(ASN1_TAG_ENUMERATED,val,in,inlen) #define asn1_implicit_enumerated_to_der(i,val,out,outlen) asn1_int_to_der_ex(ASN1_TAG_IMPLICIT(i),val,out,outlen) #define asn1_implicit_enumerated_from_der(i,val,in,inlen) asn1_int_from_der_ex(ASN1_TAG_IMPLICIT(i),val,in,inlen) int asn1_string_is_utf8_string(const char *d, size_t dlen); int asn1_utf8_string_to_der_ex(int tag, const char *d, size_t dlen, uint8_t **out, size_t *outlen); int asn1_utf8_string_from_der_ex(int tag, const char **d, size_t *dlen, const uint8_t **in, size_t *inlen); #define asn1_utf8_string_to_der(d,dlen,out,outlen) asn1_utf8_string_to_der_ex(ASN1_TAG_UTF8String,d,dlen,out,outlen) #define asn1_utf8_string_from_der(d,dlen,in,inlen) asn1_utf8_string_from_der_ex(ASN1_TAG_UTF8String,d,dlen,in,inlen) #define asn1_implicit_utf8_string_to_der(i,d,dlen,out,outlen) asn1_utf8_string_to_der_ex(ASN1_TAG_IMPLICIT(i),d,dlen,out,outlen) #define asn1_implicit_utf8_string_from_der(i,d,dlen,in,inlen) asn1_utf8_string_from_der_ex(ASN1_TAG_IMPLICIT(i),d,dlen,in,inlen) int asn1_string_is_printable_string(const char *d, size_t dlen); int asn1_printable_string_case_ignore_match(const char *a, size_t alen, const char *b, size_t blen); int asn1_printable_string_to_der_ex(int tag, const char *d, size_t dlen, uint8_t **out, size_t *outlen); int asn1_printable_string_from_der_ex(int tag, const char **d, size_t *dlen, const uint8_t **in, size_t *inlen); #define asn1_printable_string_to_der(d,dlen,out,outlen) asn1_printable_string_to_der_ex(ASN1_TAG_PrintableString,d,dlen,out,outlen) #define asn1_printable_string_from_der(d,dlen,in,inlen) asn1_printable_string_from_der_ex(ASN1_TAG_PrintableString,d,dlen,in,inlen) #define asn1_implicit_printable_string_to_der(i,d,dlen,out,outlen) asn1_printable_string_to_der_ex(ASN1_TAG_IMPLICIT(i),d,dlen,out,outlen) #define asn1_implicit_printable_string_from_der(i,d,dlen,in,inlen) asn1_printable_string_from_der_ex(ASN1_TAG_IMPLICIT(i),d,dlen,in,inlen) int asn1_string_is_ia5_string(const char *d, size_t dlen); int asn1_ia5_string_to_der_ex(int tag, const char *d, size_t dlen, uint8_t **out, size_t *outlen); int asn1_ia5_string_from_der_ex(int tag, const char **d, size_t *dlen, const uint8_t **in, size_t *inlen); #define asn1_ia5_string_to_der(d,dlen,out,outlen) asn1_ia5_string_to_der_ex(ASN1_TAG_IA5String,d,dlen,out,outlen) #define asn1_ia5_string_from_der(d,dlen,in,inlen) asn1_ia5_string_from_der_ex(ASN1_TAG_IA5String,d,dlen,in,inlen) #define asn1_implicit_ia5_string_to_der(i,d,dlen,out,outlen) asn1_ia5_string_to_der_ex(ASN1_TAG_IMPLICIT(i),d,dlen,out,outlen) #define asn1_implicit_ia5_string_from_der(i,d,dlen,in,inlen) asn1_ia5_string_from_der_ex(ASN1_TAG_IMPLICIT(i),d,dlen,in,inlen) int asn1_string_print(FILE *fp, int fmt, int ind, const char *label, int tag, const uint8_t *d, size_t dlen); #define ASN1_UTC_TIME_STRLEN (sizeof("YYMMDDHHMMSSZ")-1) #define ASN1_GENERALIZED_TIME_STRLEN (sizeof("YYYYMMDDHHMMSSZ")-1) #define ASN1_GENERALIZED_TIME_MAX_SIZE (2 + ASN1_GENERALIZED_TIME_STRLEN) int asn1_time_to_str(int utc_time, time_t timestamp, char *str); int asn1_time_from_str(int utc_time, time_t *timestamp, const char *str); int asn1_utc_time_to_der_ex(int tag, time_t tv, uint8_t **out, size_t *outlen); int asn1_utc_time_from_der_ex(int tag, time_t *tv, const uint8_t **in, size_t *inlen); #define asn1_utc_time_to_der(tv,out,outlen) asn1_utc_time_to_der_ex(ASN1_TAG_UTCTime,tv,out,outlen) #define asn1_utc_time_from_der(tv,in,inlen) asn1_utc_time_from_der_ex(ASN1_TAG_UTCTime,tv,in,inlen) #define asn1_implicit_utc_time_to_der(i,tv,out,outlen) asn1_utc_time_to_der_ex(ASN1_TAG_IMPLICIT(i),tv,out,outlen) #define asn1_implicit_utc_time_from_der(i,tv,in,inlen) asn1_utc_time_from_der_ex(ASN1_TAG_IMPLICIT(i),tv,in,inlen) int asn1_generalized_time_to_der_ex(int tag, time_t tv, uint8_t **out, size_t *outlen); int asn1_generalized_time_from_der_ex(int tag, time_t *tv, const uint8_t **in, size_t *inlen); #define asn1_generalized_time_to_der(tv,out,outlen) asn1_generalized_time_to_der_ex(ASN1_TAG_GeneralizedTime,tv,out,outlen) #define asn1_generalized_time_from_der(tv,in,inlen) asn1_generalized_time_from_der_ex(ASN1_TAG_GeneralizedTime,tv,in,inlen) #define asn1_implicit_generalized_time_to_der(i,tv,out,outlen) asn1_generalized_time_to_der_ex(ASN1_TAG_IMPLICIT(i),tv,out,outlen) #define asn1_implicit_generalized_time_from_der(i,tv,in,inlen) asn1_generalized_time_from_der_ex(ASN1_TAG_IMPLICIT(i),tv,in,inlen) // BasicConstraints might be an empty sequence in entity certificates #define asn1_sequence_to_der(d,dlen,out,outlen) asn1_type_to_der(ASN1_TAG_SEQUENCE,d,dlen,out,outlen) #define asn1_sequence_from_der(d,dlen,in,inlen) asn1_type_from_der(ASN1_TAG_SEQUENCE,d,dlen,in,inlen) #define asn1_implicit_sequence_to_der(i,d,dlen,out,outlen) asn1_nonempty_type_to_der(ASN1_TAG_EXPLICIT(i),d,dlen,out,outlen) #define asn1_implicit_sequence_from_der(i,d,dlen,in,inlen) asn1_nonempty_type_from_der(ASN1_TAG_EXPLICIT(i),d,dlen,in,inlen) #define asn1_sequence_of_to_der(d,dlen,out,outlen) asn1_nonempty_type_to_der(ASN1_TAG_SEQUENCE,d,dlen,out,outlen) #define asn1_sequence_of_from_der(d,dlen,in,inlen) asn1_nonempty_type_from_der(ASN1_TAG_SEQUENCE,d,dlen,in,inlen) int asn1_sequence_of_int_to_der(const int *nums, size_t nums_cnt, uint8_t **out, size_t *outlen); int asn1_sequence_of_int_from_der(int *nums, size_t *nums_cnt, size_t max_nums, const uint8_t **in, size_t *inlen); int asn1_sequence_of_int_print(FILE *fp, int fmt, int ind, const char *label, const uint8_t *d, size_t dlen); #define asn1_set_to_der(d,dlen,out,outlen) asn1_nonempty_type_to_der(ASN1_TAG_SET,d,dlen,out,outlen) #define asn1_set_from_der(d,dlen,in,inlen) asn1_nonempty_type_from_der(ASN1_TAG_SET,d,dlen,in,inlen) #define asn1_implicit_set_to_der(i,d,dlen,out,outlen) asn1_type_to_der(ASN1_TAG_EXPLICIT(i),d,dlen,out,outlen) #define asn1_implicit_set_from_der(i,d,dlen,in,inlen) asn1_type_from_der(ASN1_TAG_EXPLICIT(i),d,dlen,in,inlen) #define asn1_set_of_to_der(d,dlen,out,outlen) asn1_nonempty_type_to_der(ASN1_TAG_SET,d,dlen,out,outlen) #define asn1_set_of_from_der(d,dlen,in,inlen) asn1_nonempty_type_from_der(ASN1_TAG_SET,d,dlen,in,inlen) #define asn1_implicit_to_der(i,d,dlen,out,outlen) asn1_type_to_der(ASN1_TAG_IMPLICIT(i),d,dlen,out,outlen) #define asn1_implicit_from_der(i,d,dlen,in,inlen) asn1_type_from_der(ASN1_TAG_IMPLICIT(i),d,dlen,in,inlen) int asn1_header_to_der(int tag, size_t dlen, uint8_t **out, size_t *outlen); #define asn1_implicit_header_to_der(i,dlen,out,outlen) asn1_header_to_der(ASN1_TAG_EXPLICIT(i),dlen,out,outlen) #define asn1_octet_string_header_to_der(dlen,out,outlen) asn1_header_to_der(ASN1_TAG_OCTET_STRING,dlen,out,outlen) #define asn1_sequence_header_to_der_ex(tag,dlen,out,outlen) asn1_header_to_der(tag,dlen,out,outlen) #define asn1_sequence_header_to_der(dlen,out,outlen) asn1_header_to_der(ASN1_TAG_SEQUENCE,dlen,out,outlen) #define asn1_implicit_sequence_header_to_der(i,dlen,out,outlen) asn1_header_to_der(ASN1_TAG_EXPLICIT(i),dlen,out,outlen) #define asn1_set_header_to_der(dlen,out,outlen) asn1_header_to_der(ASN1_TAG_SET,dlen,out,outlen) #define asn1_implicit_set_header_to_der(i,dlen,out,outlen) asn1_header_to_der(ASN1_TAG_EXPLICIT(i),dlen,out,outlen) #define asn1_explicit_header_to_der(i,dlen,out,outlen) asn1_header_to_der(ASN1_TAG_EXPLICIT(i),dlen,out,outlen) #define asn1_explicit_to_der(i,d,dlen,out,outlen) asn1_nonempty_type_to_der(ASN1_TAG_EXPLICIT(i),d,dlen,out,outlen) #define asn1_explicit_from_der(i,d,dlen,in,inlen) asn1_nonempty_type_from_der(ASN1_TAG_EXPLICIT(i),d,dlen,in,inlen) // d,dlen 是 SEQUENCE OF, SET OF 中的值 int asn1_types_get_count(const uint8_t *d, size_t dlen, int tag, size_t *cnt); int asn1_types_get_item_by_index(const uint8_t *d, size_t dlen, int tag, int index, const uint8_t **item_d, size_t *item_dlen); int asn1_check(int expr); #if __cplusplus } #endif #endif