diff options
Diffstat (limited to 'libasn1print/asn1print.c')
| -rw-r--r-- | libasn1print/asn1print.c | 456 |
1 files changed, 456 insertions, 0 deletions
diff --git a/libasn1print/asn1print.c b/libasn1print/asn1print.c new file mode 100644 index 00000000..992dcfa0 --- /dev/null +++ b/libasn1print/asn1print.c @@ -0,0 +1,456 @@ +#include <stdio.h> +#include <string.h> +#include <errno.h> +#include <assert.h> + +#include <asn1parser.h> + +#include "asn1print.h" + +#define INDENT(fmt, args...) do { \ + int __i = level; while(__i--) putchar(' '); \ + printf(fmt, ##args); \ + } while(0) + +static int asn1print_module(asn1p_module_t *mod, enum asn1print_flags_e flags); +static int asn1print_oid(asn1p_oid_t *oid, enum asn1print_flags_e flags); +static int asn1print_ref(asn1p_ref_t *ref, enum asn1print_flags_e flags); +static int asn1print_tag(asn1p_expr_t *tc, enum asn1print_flags_e flags); +static int asn1print_params(asn1p_paramlist_t *pl,enum asn1print_flags_e flags); +static int asn1print_with_syntax(asn1p_wsyntx_t *wx, enum asn1print_flags_e flags); +static int asn1print_constraint(asn1p_constraint_t *, enum asn1print_flags_e); +static int asn1print_value(asn1p_value_t *val, enum asn1print_flags_e flags); +static int asn1print_expr(asn1p_expr_t *tc, enum asn1print_flags_e flags, + int level); + +/* + * Print the contents of the parsed ASN tree. + */ +int +asn1print(asn1p_t *asn, enum asn1print_flags_e flags) { + asn1p_module_t *mod; + + if(asn == NULL) { + errno = EINVAL; + return -1; + } + + TQ_FOR(mod, &(asn->modules), mod_next) { + asn1print_module(mod, flags); + } + + return 0; +} + +static int +asn1print_module(asn1p_module_t *mod, enum asn1print_flags_e flags) { + asn1p_expr_t *tc; + + if(!(flags & APF_NO_SOURCE_COMMENTS)) + printf("\n-- Contents of \"%s\"\n", mod->source_file_name); + + printf("\n%s ", mod->Identifier); + if(mod->module_oid) { + asn1print_oid(mod->module_oid, flags); + printf("\n"); + } + + printf("DEFINITIONS"); + + if(mod->module_flags & MSF_EXPLICIT_TAGS) + printf(" EXPLICIT TAGS"); + if(mod->module_flags & MSF_IMPLICIT_TAGS) + printf(" IMPLICIT TAGS"); + if(mod->module_flags & MSF_AUTOMATIC_TAGS) + printf(" AUTOMATIC TAGS"); + if(mod->module_flags & MSF_EXTENSIBILITY_IMPLIED) + printf(" EXTENSIBILITY IMPLIED"); + + printf(" ::=\n"); + printf("BEGIN\n\n"); + + TQ_FOR(tc, &(mod->members), next) { + asn1print_expr(tc, flags, 0); + printf("\n\n"); + } + + printf("END\n"); + + return 0; +} + +static int +asn1print_oid(asn1p_oid_t *oid, enum asn1print_flags_e flags) { + int ac; + int accum = 0; + + printf("{"); + for(ac = 0; ac < oid->arcs_count; ac++) { + if(accum + strlen(oid->arcs[ac].name?:"") > 50) { + printf("\n\t"); + accum = 0; + } else if(ac) printf(" "); + + if(oid->arcs[ac].name) { + printf("%s(%d)", + oid->arcs[ac].name, + (int)oid->arcs[ac].number); + accum += strlen(oid->arcs[ac].name); + } else { + printf("%d", + (int)oid->arcs[ac].number); + } + accum += 4; + } + printf(" }"); + + return 0; +} + +static int +asn1print_ref(asn1p_ref_t *ref, enum asn1print_flags_e flags) { + int cc; + + for(cc = 0; cc < ref->comp_count; cc++) { + if(cc) printf("."); + printf("%s", ref->components[cc].name); + } + + return 0; +} + +static int +asn1print_tag(asn1p_expr_t *tc, enum asn1print_flags_e flags) { + struct asn1p_type_tag_s *tag = &tc->tag; + + if(tag->tag_class == TC_NOCLASS) + return 0; + + printf("["); + switch(tag->tag_class) { + case TC_NOCLASS: + assert(tag->tag_class != TC_NOCLASS); + break; + case TC_UNIVERSAL: printf("UNIVERSAL "); break; + case TC_PRIVATE: printf("PRIVATE "); break; + case TC_APPLICATION: printf("APPLICATION "); break; + case TC_CONTEXT_SPECIFIC: + break; + } + printf("%lld]", (long long)tag->tag_value); + + switch(tag->tag_mode) { + case TM_DEFAULT: break; + case TM_IMPLICIT: printf(" IMPLICIT"); break; + case TM_EXPLICIT: printf(" EXPLICIT"); break; + } + + return 0; +} + +static int +asn1print_value(asn1p_value_t *val, enum asn1print_flags_e flags) { + + if(val == NULL) + return 0; + + switch(val->type) { + case ATV_NOVALUE: + break; + case ATV_REFERENCED: + return asn1print_ref(val->value.reference, flags); + case ATV_INTEGER: + printf("%lld", (long long)val->value.v_integer); + return 0; + case ATV_MIN: printf("MIN"); return 0; + case ATV_MAX: printf("MAX"); return 0; + case ATV_FALSE: printf("FALSE"); return 0; + case ATV_TRUE: printf("TRUE"); return 0; + case ATV_REAL: + printf("%f", val->value.v_double); + return 0; + case ATV_STRING: + { + char *p = val->value.string.buf; + putchar('"'); + if(strchr(p, '"')) { + /* Mask quotes */ + for(; *p; p++) { + if(*p == '"') + putchar(*p); + putchar(*p); + } + } else { + fputs(p, stdout); + } + putchar('"'); + } + return 0; + case ATV_UNPARSED: + fputs(val->value.string.buf, stdout); + return 0; + case ATV_BITVECTOR: + { + uint8_t *bitvector; + int bits; + int i; + + bitvector = val->value.binary_vector.bits; + bits = val->value.binary_vector.size_in_bits; + + printf("'"); + if(bits%8) { + for(i = 0; i < bits; i++) { + uint8_t uc; + uc = bitvector[i>>3]; + putchar(((uc >> (7-(i%8)))&1)?'1':'0'); + } + printf("'B"); + } else { + char hextable[16] = "0123456789ABCDEF"; + for(i = 0; i < (bits>>3); i++) { + putchar(hextable[bitvector[i] >> 4]); + putchar(hextable[bitvector[i] & 0x0f]); + } + printf("'H"); + } + } + } + + assert(val->type || !"Unknown"); + + return 0; +} + +static int +asn1print_constraint(asn1p_constraint_t *ct, enum asn1print_flags_e flags) { + int symno = 0; + + if(ct == 0) return 0; + + if(ct->type == ACT_CA_SET) + printf("("); + + switch(ct->type) { + case ACT_EL_VALUE: + asn1print_value(ct->value, flags); + break; + case ACT_EL_RANGE: + case ACT_EL_LLRANGE: + case ACT_EL_RLRANGE: + case ACT_EL_ULRANGE: + asn1print_value(ct->range_start, flags); + switch(ct->type) { + case ACT_EL_RANGE: printf(".."); break; + case ACT_EL_LLRANGE: printf("<.."); break; + case ACT_EL_RLRANGE: printf("..<"); break; + case ACT_EL_ULRANGE: printf("<..<"); break; + default: printf("?..?"); break; + } + asn1print_value(ct->range_stop, flags); + break; + case ACT_EL_EXT: + printf("..."); + break; + case ACT_CT_SIZE: + case ACT_CT_FROM: + switch(ct->type) { + case ACT_CT_SIZE: printf("SIZE ("); break; + case ACT_CT_FROM: printf("FROM ("); break; + default: printf("??? ("); break; + } + assert(ct->el_count != 0); + assert(ct->el_count == 1); + asn1print_constraint(ct->elements[0], flags); + printf(")"); + break; + case ACT_CT_WCOMP: + case ACT_CT_WCOMPS: + printf("???"); + break; + case ACT_CA_SET: symno++; + case ACT_CA_CRC: symno++; + case ACT_CA_CSV: symno++; + case ACT_CA_UNI: symno++; + case ACT_CA_INT: symno++; + case ACT_CA_EXC: + { + char *symtable[] = { " EXCEPT ", "^", "|", ",", + "", "(" }; + int i; + for(i = 0; i < ct->el_count; i++) { + enum asn1print_flags_e nflags = flags; + if(i) fputs(symtable[symno], stdout); + if(ct->type == ACT_CA_CRC) fputs("{", stdout); + asn1print_constraint(ct->elements[i], nflags); + if(ct->type == ACT_CA_CRC) fputs("}", stdout); + if(i+1 < ct->el_count + && ct->type == ACT_CA_SET) + fputs(")", stdout); + } + } + break; + case ACT_INVALID: + assert(ct->type != ACT_INVALID); + break; + } + + if(ct->type == ACT_CA_SET) + printf(")"); + + return 0; +} + +static int +asn1print_params(asn1p_paramlist_t *pl, enum asn1print_flags_e flags) { + if(pl) { + int i; + printf("{"); + for(i = 0; i < pl->params_count; i++) { + if(i) printf(", "); + if(pl->params[i].governor) { + asn1print_ref(pl->params[i].governor, flags); + printf(":"); + } + printf("%s", pl->params[i].argument); + } + printf("}"); + } + + return 0; +} + +static int +asn1print_with_syntax(asn1p_wsyntx_t *wx, enum asn1print_flags_e flags) { + if(wx) { + asn1p_wsyntx_chunk_t *wc; + printf(" WITH SYNTAX {"); + TQ_FOR(wc, &(wx->chunks), next) { + if(wc->ref) { + asn1print_ref(wc->ref, flags); + } else { + fwrite(wc->buf, 1, wc->len, stdout); + } + } + printf("}\n"); + } + + return 0; +} + +static int +asn1print_expr(asn1p_expr_t *tc, enum asn1print_flags_e flags, int level) { + + if(flags & APF_LINE_COMMENTS) + INDENT("-- #line %d\n", tc->_lineno); + if(tc->Identifier) + INDENT("%s", tc->Identifier); + + if(tc->params) { + asn1print_params(tc->params, flags); + } + + if(tc->meta_type != AMT_VALUE + && tc->expr_type != A1TC_EXTENSIBLE) { + if(level) { + if(tc->Identifier) + printf("\t"); + } else { + printf(" ::="); + } + } + + if(tc->tag.tag_class) { + printf(" "); + asn1print_tag(tc, flags); + } + + switch(tc->expr_type) { + case A1TC_EXTENSIBLE: + if(tc->value) { + printf("!"); + asn1print_value(tc->value, flags); + } + break; + case A1TC_REFERENCE: + case A1TC_UNIVERVAL: + case A1TC_PARAMETRIZED: + break; + case A1TC_CLASSDEF: + printf(" CLASS"); + break; + case A1TC_CLASSFIELD: + /* Nothing to print here */ + break; + default: + { + char *p = ASN_EXPR_TYPE2STR(tc->expr_type); + printf(" %s", p?p:"<unknown type!>"); + } + break; + } + + if(tc->reference) { + printf(" "); + asn1print_ref(tc->reference, flags); + } + + /* + * Display the descendants (children) of the current type. + */ + if(TQ_FIRST(&(tc->members))) { + asn1p_expr_t *se; /* SubExpression */ + + if((tc->expr_type != ASN_CONSTR_SEQUENCE_OF + && tc->expr_type != ASN_CONSTR_SET_OF) + || TQ_FIRST(&(tc->members))->expr_type & ASN_CONSTR_MASK) + printf(" {\n"); + + TQ_FOR(se, &(tc->members), next) { + /* + * Print the expression as it were stand-alone type. + */ + asn1print_expr(se, flags, level + 4); + switch(se->marker) { + case EM_NOMARK: break; + case EM_OPTIONAL: printf(" OPTIONAL"); break; + case EM_DEFAULT: printf(" DEFAULT <?>"); break; + } + if(TQ_NEXT(se, next)) { + printf(","); + INDENT("\n"); + } + } + + if((tc->expr_type != ASN_CONSTR_SEQUENCE_OF + && tc->expr_type != ASN_CONSTR_SET_OF) + || TQ_FIRST(&(tc->members))->expr_type & ASN_CONSTR_MASK) { + printf("\n"); + INDENT("}"); + } + } + + if(tc->with_syntax) + asn1print_with_syntax(tc->with_syntax, flags); + + if(tc->constraints) { + printf(" "); + asn1print_constraint(tc->constraints, flags); + } + if(tc->unique) { + printf(" UNIQUE"); + } + + if(tc->meta_type == AMT_VALUE + && tc->expr_type != A1TC_EXTENSIBLE) { + if(tc->expr_type == A1TC_UNIVERVAL) + printf("("); + else + printf(" ::= "); + asn1print_value(tc->value, flags); + if(tc->expr_type == A1TC_UNIVERVAL) + printf(")"); + } + + return 0; +} |