/src/open5gs/lib/asn1c/common/OCTET_STRING_aper.c

Source
/*
 * Copyright (c) 2017 Lev Walkin <vlm@lionet.info>.
 * All rights reserved.
 * Redistribution and modifications are permitted subject to BSD license.
 */
#include <asn_internal.h>
#include <OCTET_STRING.h>
#include <BIT_STRING.h>  /* for .bits_unused member */

#undef RETURN
#define RETURN(_code) do {\
        asn_dec_rval_t tmprval;\
        tmprval.code = _code;\
        tmprval.consumed = consumed_myself;\
        return tmprval;\
    } while(0)

static asn_per_constraints_t asn_DEF_OCTET_STRING_constraints = {
    { APC_CONSTRAINED, 8, 8, 0, 255 },
    { APC_SEMI_CONSTRAINED, -1, -1, 0, 0 },
    0, 0
};

asn_dec_rval_t
OCTET_STRING_decode_aper(const asn_codec_ctx_t *opt_codec_ctx,
                         const asn_TYPE_descriptor_t *td,
                         const asn_per_constraints_t *constraints,
                         void **sptr, asn_per_data_t *pd) {

    const asn_OCTET_STRING_specifics_t *specs = td->specifics
        ? (const asn_OCTET_STRING_specifics_t *)td->specifics
        : &asn_SPC_OCTET_STRING_specs;
    const asn_per_constraints_t *pc = constraints
        ? constraints
        : td->encoding_constraints.per_constraints;
    const asn_per_constraint_t *cval;
    const asn_per_constraint_t *csiz;
    asn_dec_rval_t rval = { RC_OK, 0 };
    BIT_STRING_t *st = (BIT_STRING_t *)*sptr;
    ssize_t consumed_myself = 0;
    int repeat;
    enum {
        OS__BPC_BIT = 0,
        OS__BPC_CHAR = 1,
        OS__BPC_U16 = 2,
        OS__BPC_U32 = 4
    } bpc;  /* Bytes per character */
    unsigned int unit_bits;
    unsigned int canonical_unit_bits;

    (void)opt_codec_ctx;

    if(pc) {
        cval = &pc->value;
        csiz = &pc->size;
    } else {
        cval = &asn_DEF_OCTET_STRING_constraints.value;
        csiz = &asn_DEF_OCTET_STRING_constraints.size;
    }

    switch(specs->subvariant) {
    case ASN_OSUBV_ANY:
    case ASN_OSUBV_STR:
        canonical_unit_bits = unit_bits = 8;
        if(cval->flags & APC_CONSTRAINED) {
            /* follow power of 2 rule */
            if (cval->range_bits <= 2) {
            unit_bits = 2;
            } else {
          if (cval->range_bits <= 4) {
              unit_bits = 4;
              /* otherwise, unit_bits = 8; */
          }
     }
           /* unit_bits = cval->range_bits; */
           ASN_DEBUG("APER decoding ASN_OSUBV_STR range_bits = %d unit_bits = %d\n",
              cval->range_bits, unit_bits);
        }
        bpc = OS__BPC_CHAR;
        break;
    case ASN_OSUBV_U16:
        canonical_unit_bits = unit_bits = 16;
        if(cval->flags & APC_CONSTRAINED) {
            unit_bits = cval->range_bits;
            ASN_DEBUG("APER decoding ASN_OSUBV_U16 range_bits = %d\n", cval->range_bits);
        }
        bpc = OS__BPC_U16;
        break;
    case ASN_OSUBV_U32:
        canonical_unit_bits = unit_bits = 32;
        if(cval->flags & APC_CONSTRAINED) {
            unit_bits = cval->range_bits;
            ASN_DEBUG("APER decoding ASN_OSUBV_U32 range_bits = %d\n", cval->range_bits);
        }
        bpc = OS__BPC_U32;
        break;
/*
    case ASN_OSUBV_ANY:
        ASN_DEBUG("Unrecognized subvariant %d", specs->subvariant);
        RETURN(RC_FAIL);
*/
    case ASN_OSUBV_BIT:
    default:
        canonical_unit_bits = unit_bits = 1;
        bpc = OS__BPC_BIT;
        break;
    }

    /*
     * Allocate the string.
     */
    if(!st) {
        st = (BIT_STRING_t *)(*sptr = CALLOC(1, specs->struct_size));
        if(!st) RETURN(RC_FAIL);
    }

    ASN_DEBUG("PER Decoding %s size %lld .. %lld bits %d",
              csiz->flags & APC_EXTENSIBLE ? "extensible" : "non-extensible",
              (long long int)csiz->lower_bound, (long long int)csiz->upper_bound,
              csiz->effective_bits);

    if(csiz->flags & APC_EXTENSIBLE) {
        int inext = per_get_few_bits(pd, 1);
        if(inext < 0) RETURN(RC_WMORE);
        if(inext) {
            csiz = &asn_DEF_OCTET_STRING_constraints.size;
            cval = &asn_DEF_OCTET_STRING_constraints.value;
            unit_bits = canonical_unit_bits;
        }
    }

    if(csiz->effective_bits >= 0) {
        FREEMEM(st->buf);
        if(bpc) {
            st->size = csiz->upper_bound * bpc;
        } else {
            st->size = (csiz->upper_bound + 7) >> 3;
        }
        st->buf = (uint8_t *)MALLOC(st->size + 1);
        if(!st->buf) { st->size = 0; RETURN(RC_FAIL); }
    }

    /* X.691, #16.5: zero-length encoding */
    /* X.691, #16.6: short fixed length encoding (up to 2 octets) */
    /* X.691, #16.7: long fixed length encoding (up to 64K octets) */
    if(csiz->effective_bits == 0) {
        int ret;
        /* X.691 #16 NOTE 1 for fixed length (<= 16 bits) strings */
        if (st->size > 2 || csiz->range_bits != 0) {
            if (aper_get_align(pd) < 0)
                RETURN(RC_FAIL);
        }
        if(bpc) {
            ASN_DEBUG("Decoding OCTET STRING size %lld",
                      (long long int)csiz->upper_bound);
            ret = OCTET_STRING_per_get_characters(pd, st->buf,
                                                  csiz->upper_bound,
                                                  bpc, unit_bits,
                                                  cval->lower_bound,
                                                  cval->upper_bound,
                                                  pc);
            if(ret > 0) RETURN(RC_FAIL);
        } else {
            ASN_DEBUG("Decoding BIT STRING size %lld",
                      (long long int)csiz->upper_bound);
            ret = per_get_many_bits(pd, st->buf, 0,
                                    unit_bits * csiz->upper_bound);
        }
        if(ret < 0) RETURN(RC_WMORE);
        consumed_myself += unit_bits * csiz->upper_bound;
        st->buf[st->size] = 0;
        if(bpc == 0) {
            int ubs = (csiz->upper_bound & 0x7);
            st->bits_unused = ubs ? 8 - ubs : 0;
        }
        RETURN(RC_OK);
    }

    st->size = 0;
    do {
        ssize_t raw_len;
        ssize_t len_bytes;
        ssize_t len_bits;
        void *p;
        int ret;

        repeat = 0;
        /* Get the PER length */
        if (csiz->upper_bound - csiz->lower_bound == 0)
            /* Indefinite length case */
            raw_len = aper_get_length(pd, -1, -1, csiz->effective_bits, &repeat);
        else
            raw_len = aper_get_length(pd, csiz->lower_bound, csiz->upper_bound,
                                      csiz->effective_bits, &repeat);
        if(raw_len < 0) RETURN(RC_WMORE);

        ASN_DEBUG("Got PER length eb %ld, len %ld, %s (%s)",
                  (long)csiz->effective_bits, (long)raw_len,
                  repeat ? "repeat" : "once", td->name);

        /* X.691 #16 NOTE 1  for fixed length (<=16 bits) strings */
        if ((raw_len > 2) || (csiz->upper_bound > 2) || (csiz->range_bits != 0))
        {
            if (aper_get_align(pd) < 0)
                RETURN(RC_FAIL);
        }

        if(bpc) {
            len_bytes = raw_len * bpc;
            len_bits = len_bytes * unit_bits;
        } else {
            len_bits = raw_len;
            len_bytes = (len_bits + 7) >> 3;
            if(len_bits & 0x7)
                st->bits_unused = 8 - (len_bits & 0x7);
            /* len_bits be multiple of 16K if repeat is set */
        }
        p = REALLOC(st->buf, st->size + len_bytes + 1);
        if(!p) RETURN(RC_FAIL);
        st->buf = (uint8_t *)p;

        if(bpc) {
            ret = OCTET_STRING_per_get_characters(pd,
                                                  &st->buf[st->size],
                                                  raw_len, bpc,
                                                  unit_bits,
                                                  cval->lower_bound,
                                                  cval->upper_bound,
                                                  pc);
            if(ret > 0) RETURN(RC_FAIL);
        } else {
            ret = per_get_many_bits(pd, &st->buf[st->size],
                                    0, len_bits);
        }
        if(ret < 0) RETURN(RC_WMORE);
        st->size += len_bytes;
    } while(repeat);
    st->buf[st->size] = 0;  /* nul-terminate */

    return rval;
}

asn_enc_rval_t
OCTET_STRING_encode_aper(const asn_TYPE_descriptor_t *td,
                         const asn_per_constraints_t *constraints,
                         const void *sptr, asn_per_outp_t *po) {

    const asn_OCTET_STRING_specifics_t *specs = td->specifics
        ? (const asn_OCTET_STRING_specifics_t *)td->specifics
        : &asn_SPC_OCTET_STRING_specs;
    const asn_per_constraints_t *pc = constraints
        ? constraints
        : td->encoding_constraints.per_constraints;
    const asn_per_constraint_t *cval;
    const asn_per_constraint_t *csiz;
    const BIT_STRING_t *st = (const BIT_STRING_t *)sptr;
    asn_enc_rval_t er = { 0, 0, 0 };
    int inext = 0;  /* Lies not within extension root */
    unsigned int unit_bits;
    unsigned int canonical_unit_bits;
    unsigned int sizeinunits;
    const uint8_t *buf;
    int ret;
    enum {
        OS__BPC_BIT  = 0,
        OS__BPC_CHAR = 1,
        OS__BPC_U16  = 2,
        OS__BPC_U32  = 4
    } bpc;  /* Bytes per character */
    int ct_extensible;

    if(!st || (!st->buf && st->size))
        ASN__ENCODE_FAILED;

    if(pc) {
        cval = &pc->value;
        csiz = &pc->size;
    } else {
        cval = &asn_DEF_OCTET_STRING_constraints.value;
        csiz = &asn_DEF_OCTET_STRING_constraints.size;
    }
    ct_extensible = csiz->flags & APC_EXTENSIBLE;

    switch(specs->subvariant) {
    case ASN_OSUBV_ANY:
    case ASN_OSUBV_STR:
        canonical_unit_bits = unit_bits = 8;
        if(cval->flags & APC_CONSTRAINED) {
          /* follow power of 2 rule */
          if (cval->range_bits <= 2) {
            unit_bits = 2;
          } else {
            if (cval->range_bits <= 4)
              unit_bits = 4;
            /* otherwise, unit_bits = 8; */
          }
              /* unit_bits = cval->range_bits; */
              ASN_DEBUG("APER encoding ASN_OSUBV_STR range_bits = %d unit_bits = %d\n", 
                cval->range_bits, unit_bits);
        }
        bpc = OS__BPC_CHAR;
        sizeinunits = st->size;
        break;
    case ASN_OSUBV_U16:
        canonical_unit_bits = unit_bits = 16;
        if(cval->flags & APC_CONSTRAINED) {
            unit_bits = cval->range_bits;
            ASN_DEBUG("APER encoding ASN_OSUBV_U16 range_bits = %d\n", cval->range_bits);
        }
        bpc = OS__BPC_U16;
        sizeinunits = st->size / 2;
        break;
    case ASN_OSUBV_U32:
        canonical_unit_bits = unit_bits = 32;
        if(cval->flags & APC_CONSTRAINED) {
            unit_bits = cval->range_bits;
            ASN_DEBUG("APER encoding ASN_OSUBV_U32 range_bits = %d\n", cval->range_bits);
        }
        bpc = OS__BPC_U32;
        sizeinunits = st->size / 4;
        break;
/*
    case ASN_OSUBV_ANY:
        ASN__ENCODE_FAILED;
*/
    case ASN_OSUBV_BIT:
    default:
        canonical_unit_bits = unit_bits = 1;
        bpc = OS__BPC_BIT;
        sizeinunits = st->size * 8 - (st->bits_unused & 0x07);
        ASN_DEBUG("BIT STRING of %d bytes", sizeinunits);
        break;
    }

    ASN_DEBUG("Encoding %s into %d units of %d bits"
              " (%lld..%lld, effective %d)%s",
              td->name, sizeinunits, unit_bits,
              (long long int)csiz->lower_bound,
              (long long int)csiz->upper_bound,
              csiz->effective_bits, ct_extensible ? " EXT" : "");

    /* Figure out wheter size lies within PER visible constraint */

    if(csiz->effective_bits >= 0) {
        if((int)sizeinunits < csiz->lower_bound
        || (int)sizeinunits > csiz->upper_bound) {
            if(ct_extensible) {
                cval = &asn_DEF_OCTET_STRING_constraints.value;
                csiz = &asn_DEF_OCTET_STRING_constraints.size;
                unit_bits = canonical_unit_bits;
                inext = 1;
            } else
                ASN__ENCODE_FAILED;
        }
    } else {
        inext = 0;
    }

    if(ct_extensible) {
        /* Declare whether length is [not] within extension root */
        if(per_put_few_bits(po, inext, 1))
            ASN__ENCODE_FAILED;
    }

    /* X.691, #16.5: zero-length encoding */
    /* X.691, #16.6: short fixed length encoding (up to 2 octets) */
    /* X.691, #16.7: long fixed length encoding (up to 64K octets) */
    if(csiz->effective_bits >= 0) {
        ASN_DEBUG("Encoding %zu bytes (%lld), length in %d bits",
                  st->size, (long long int)(sizeinunits - csiz->lower_bound),
                  csiz->effective_bits);
        if (csiz->effective_bits > 0) {
                ret = aper_put_length(po, csiz->lower_bound, csiz->upper_bound,
                                      sizeinunits - csiz->lower_bound, NULL);
                if(ret < 0) ASN__ENCODE_FAILED;
        }
        if (csiz->effective_bits > 0 || (st->size > 2)
            || (csiz->upper_bound > (2 * 8 / unit_bits))
            || (csiz->range_bits != 0))
        { /* X.691 #16 NOTE 1 for fixed length (<=16 bits) strings*/
            if (aper_put_align(po) < 0)
                ASN__ENCODE_FAILED;
        }
        if(bpc) {
            ret = OCTET_STRING_per_put_characters(po, st->buf,
                                                  sizeinunits,
                                                  bpc, unit_bits,
                                                  cval->lower_bound,
                                                  cval->upper_bound,
                                                  pc);
        } else {
            ret = per_put_many_bits(po, st->buf,
                                    sizeinunits * unit_bits);
        }
        if(ret) ASN__ENCODE_FAILED;
        ASN__ENCODED_OK(er);
    }

    ASN_DEBUG("Encoding %zu bytes", st->size);

    if(sizeinunits == 0) {
        if(aper_put_length(po, -1, -1, 0, NULL) < 0)
            ASN__ENCODE_FAILED;
        ASN__ENCODED_OK(er);
    }

    buf = st->buf;
    while(sizeinunits) {
        int need_eom = 0;
        ssize_t maySave = aper_put_length(po, -1, -1, sizeinunits, &need_eom);

        if(maySave < 0) ASN__ENCODE_FAILED;

        ASN_DEBUG("Encoding %ld of %ld",
                  (long)maySave, (long)sizeinunits);

        if(bpc) {
            ret = OCTET_STRING_per_put_characters(po, buf, maySave,
                                                  bpc, unit_bits,
                                                  cval->lower_bound,
                                                  cval->upper_bound,
                                                  pc);
        } else {
            ret = per_put_many_bits(po, buf, maySave * unit_bits);
        }
        if(ret) ASN__ENCODE_FAILED;

        if(bpc)
            buf += maySave * bpc;
        else
            buf += maySave >> 3;
        sizeinunits -= maySave;
        assert(!(maySave & 0x07) || !sizeinunits);
        if(need_eom && (aper_put_length(po, -1, -1, 0, NULL) < 0))
            ASN__ENCODE_FAILED; /* End of Message length */
    }

    ASN__ENCODED_OK(er);
}

Coverage Report

Created: 2026-08-14 06:04

Line	Count	Source
1		/*
2		* Copyright (c) 2017 Lev Walkin <vlm@lionet.info>.
3		* All rights reserved.
4		* Redistribution and modifications are permitted subject to BSD license.
5		*/
6		#include <asn_internal.h>
7		#include <OCTET_STRING.h>
8		#include <BIT_STRING.h> /* for .bits_unused member */
9
10		#undef RETURN
11	11.0k	#define RETURN(_code) do {\
12	11.0k	asn_dec_rval_t tmprval;\
13	11.0k	tmprval.code = _code;\
14	11.0k	tmprval.consumed = consumed_myself;\
15	11.0k	return tmprval;\
16	11.0k	} while(0)
17
18		static asn_per_constraints_t asn_DEF_OCTET_STRING_constraints = {
19		{ APC_CONSTRAINED, 8, 8, 0, 255 },
20		{ APC_SEMI_CONSTRAINED, -1, -1, 0, 0 },
21		0, 0
22		};
23
24		asn_dec_rval_t
25		OCTET_STRING_decode_aper(const asn_codec_ctx_t *opt_codec_ctx,
26		const asn_TYPE_descriptor_t *td,
27		const asn_per_constraints_t *constraints,
28	17.5k	void *sptr, asn_per_data_t pd) {
29
30	17.5k	const asn_OCTET_STRING_specifics_t *specs = td->specifics
31	17.5k	? (const asn_OCTET_STRING_specifics_t *)td->specifics
32	17.5k	: &asn_SPC_OCTET_STRING_specs;
33	17.5k	const asn_per_constraints_t *pc = constraints
34	17.5k	? constraints
35	17.5k	: td->encoding_constraints.per_constraints;
36	17.5k	const asn_per_constraint_t *cval;
37	17.5k	const asn_per_constraint_t *csiz;
38	17.5k	asn_dec_rval_t rval = { RC_OK, 0 };
39	17.5k	BIT_STRING_t st = (BIT_STRING_t )*sptr;
40	17.5k	ssize_t consumed_myself = 0;
41	17.5k	int repeat;
42	17.5k	enum {
43	17.5k	OS__BPC_BIT = 0,
44	17.5k	OS__BPC_CHAR = 1,
45	17.5k	OS__BPC_U16 = 2,
46	17.5k	OS__BPC_U32 = 4
47	17.5k	} bpc; /* Bytes per character */
48	17.5k	unsigned int unit_bits;
49	17.5k	unsigned int canonical_unit_bits;
50
51	17.5k	(void)opt_codec_ctx;
52
53	17.5k	if(pc) {
54	13.4k	cval = &pc->value;
55	13.4k	csiz = &pc->size;
56	13.4k	} else {
57	4.07k	cval = &asn_DEF_OCTET_STRING_constraints.value;
58	4.07k	csiz = &asn_DEF_OCTET_STRING_constraints.size;
59	4.07k	}
60
61	17.5k	switch(specs->subvariant) {
62	0	case ASN_OSUBV_ANY:
63	12.3k	case ASN_OSUBV_STR:
64	12.3k	canonical_unit_bits = unit_bits = 8;
65	12.3k	if(cval->flags & APC_CONSTRAINED) {
66		/* follow power of 2 rule */
67	4.16k	if (cval->range_bits <= 2) {
68	0	unit_bits = 2;
69	4.16k	} else {
70	4.16k	if (cval->range_bits <= 4) {
71	0	unit_bits = 4;
72		/* otherwise, unit_bits = 8; */
73	0	}
74	4.16k	}
75		/* unit_bits = cval->range_bits; */
76	4.16k	ASN_DEBUG("APER decoding ASN_OSUBV_STR range_bits = %d unit_bits = %d\n",
77	4.16k	cval->range_bits, unit_bits);
78	4.16k	}
79	12.3k	bpc = OS__BPC_CHAR;
80	12.3k	break;
81	0	case ASN_OSUBV_U16:
82	0	canonical_unit_bits = unit_bits = 16;
83	0	if(cval->flags & APC_CONSTRAINED) {
84	0	unit_bits = cval->range_bits;
85	0	ASN_DEBUG("APER decoding ASN_OSUBV_U16 range_bits = %d\n", cval->range_bits);
86	0	}
87	0	bpc = OS__BPC_U16;
88	0	break;
89	0	case ASN_OSUBV_U32:
90	0	canonical_unit_bits = unit_bits = 32;
91	0	if(cval->flags & APC_CONSTRAINED) {
92	0	unit_bits = cval->range_bits;
93	0	ASN_DEBUG("APER decoding ASN_OSUBV_U32 range_bits = %d\n", cval->range_bits);
94	0	}
95	0	bpc = OS__BPC_U32;
96	0	break;
97		/*
98		case ASN_OSUBV_ANY:
99		ASN_DEBUG("Unrecognized subvariant %d", specs->subvariant);
100		RETURN(RC_FAIL);
101		*/
102	5.26k	case ASN_OSUBV_BIT:
103	5.26k	default:
104	5.26k	canonical_unit_bits = unit_bits = 1;
105	5.26k	bpc = OS__BPC_BIT;
106	5.26k	break;
107	17.5k	}
108
109		/*
110		* Allocate the string.
111		*/
112	17.5k	if(!st) {
113	7.15k	st = (BIT_STRING_t )(sptr = CALLOC(1, specs->struct_size));
114	7.15k	if(!st) RETURN(RC_FAIL);
115	7.15k	}
116
117	17.5k	ASN_DEBUG("PER Decoding %s size %lld .. %lld bits %d",
118	17.5k	csiz->flags & APC_EXTENSIBLE ? "extensible" : "non-extensible",
119	17.5k	(long long int)csiz->lower_bound, (long long int)csiz->upper_bound,
120	17.5k	csiz->effective_bits);
121
122	17.5k	if(csiz->flags & APC_EXTENSIBLE) {
123	2.05k	int inext = per_get_few_bits(pd, 1);
124	2.05k	if(inext < 0) RETURN(RC_WMORE);
125	2.05k	if(inext) {
126	625	csiz = &asn_DEF_OCTET_STRING_constraints.size;
127	625	cval = &asn_DEF_OCTET_STRING_constraints.value;
128	625	unit_bits = canonical_unit_bits;
129	625	}
130	2.05k	}
131
132	17.5k	if(csiz->effective_bits >= 0) {
133	12.3k	FREEMEM(st->buf);
134	12.3k	if(bpc) {
135	7.69k	st->size = csiz->upper_bound * bpc;
136	7.69k	} else {
137	4.61k	st->size = (csiz->upper_bound + 7) >> 3;
138	4.61k	}
139	12.3k	st->buf = (uint8_t *)MALLOC(st->size + 1);
140	12.3k	if(!st->buf) { st->size = 0; RETURN(RC_FAIL); }
141	12.3k	}
142
143		/* X.691, #16.5: zero-length encoding */
144		/* X.691, #16.6: short fixed length encoding (up to 2 octets) */
145		/* X.691, #16.7: long fixed length encoding (up to 64K octets) */
146	17.5k	if(csiz->effective_bits == 0) {
147	10.8k	int ret;
148		/* X.691 #16 NOTE 1 for fixed length (<= 16 bits) strings */
149	10.8k	if (st->size > 2 \|\| csiz->range_bits != 0) {
150	5.28k	if (aper_get_align(pd) < 0)
151	0	RETURN(RC_FAIL);
152	5.28k	}
153	10.8k	if(bpc) {
154	7.61k	ASN_DEBUG("Decoding OCTET STRING size %lld",
155	7.61k	(long long int)csiz->upper_bound);
156	7.61k	ret = OCTET_STRING_per_get_characters(pd, st->buf,
157	7.61k	csiz->upper_bound,
158	7.61k	bpc, unit_bits,
159	7.61k	cval->lower_bound,
160	7.61k	cval->upper_bound,
161	7.61k	pc);
162	7.61k	if(ret > 0) RETURN(RC_FAIL);
163	7.61k	} else {
164	3.23k	ASN_DEBUG("Decoding BIT STRING size %lld",
165	3.23k	(long long int)csiz->upper_bound);
166	3.23k	ret = per_get_many_bits(pd, st->buf, 0,
167	3.23k	unit_bits * csiz->upper_bound);
168	3.23k	}
169	10.8k	if(ret < 0) RETURN(RC_WMORE);
170	10.6k	consumed_myself += unit_bits * csiz->upper_bound;
171	10.6k	st->buf[st->size] = 0;
172	10.6k	if(bpc == 0) {
173	3.17k	int ubs = (csiz->upper_bound & 0x7);
174	3.17k	st->bits_unused = ubs ? 8 - ubs : 0;
175	3.17k	}
176	10.6k	RETURN(RC_OK);
177	10.6k	}
178
179	6.71k	st->size = 0;
180	6.71k	do {
181	6.71k	ssize_t raw_len;
182	6.71k	ssize_t len_bytes;
183	6.71k	ssize_t len_bits;
184	6.71k	void *p;
185	6.71k	int ret;
186
187	6.71k	repeat = 0;
188		/* Get the PER length */
189	6.71k	if (csiz->upper_bound - csiz->lower_bound == 0)
190		/* Indefinite length case */
191	5.22k	raw_len = aper_get_length(pd, -1, -1, csiz->effective_bits, &repeat);
192	1.49k	else
193	1.49k	raw_len = aper_get_length(pd, csiz->lower_bound, csiz->upper_bound,
194	1.49k	csiz->effective_bits, &repeat);
195	6.71k	if(raw_len < 0) RETURN(RC_WMORE);
196
197	6.60k	ASN_DEBUG("Got PER length eb %ld, len %ld, %s (%s)",
198	6.60k	(long)csiz->effective_bits, (long)raw_len,
199	6.60k	repeat ? "repeat" : "once", td->name);
200
201		/* X.691 #16 NOTE 1 for fixed length (<=16 bits) strings */
202	6.60k	if ((raw_len > 2) \|\| (csiz->upper_bound > 2) \|\| (csiz->range_bits != 0))
203	6.60k	{
204	6.60k	if (aper_get_align(pd) < 0)
205	0	RETURN(RC_FAIL);
206	6.60k	}
207
208	6.60k	if(bpc) {
209	4.60k	len_bytes = raw_len * bpc;
210	4.60k	len_bits = len_bytes * unit_bits;
211	4.60k	} else {
212	1.99k	len_bits = raw_len;
213	1.99k	len_bytes = (len_bits + 7) >> 3;
214	1.99k	if(len_bits & 0x7)
215	1.68k	st->bits_unused = 8 - (len_bits & 0x7);
216		/* len_bits be multiple of 16K if repeat is set */
217	1.99k	}
218	6.60k	p = REALLOC(st->buf, st->size + len_bytes + 1);
219	6.60k	if(!p) RETURN(RC_FAIL);
220	6.60k	st->buf = (uint8_t *)p;
221
222	6.60k	if(bpc) {
223	4.60k	ret = OCTET_STRING_per_get_characters(pd,
224	4.60k	&st->buf[st->size],
225	4.60k	raw_len, bpc,
226	4.60k	unit_bits,
227	4.60k	cval->lower_bound,
228	4.60k	cval->upper_bound,
229	4.60k	pc);
230	4.60k	if(ret > 0) RETURN(RC_FAIL);
231	4.60k	} else {
232	1.99k	ret = per_get_many_bits(pd, &st->buf[st->size],
233	1.99k	0, len_bits);
234	1.99k	}
235	6.60k	if(ret < 0) RETURN(RC_WMORE);
236	6.47k	st->size += len_bytes;
237	6.47k	} while(repeat);
238	6.47k	st->buf[st->size] = 0; /* nul-terminate */
239
240	6.47k	return rval;
241	6.71k	}
242
243		asn_enc_rval_t
244		OCTET_STRING_encode_aper(const asn_TYPE_descriptor_t *td,
245		const asn_per_constraints_t *constraints,
246	0	const void sptr, asn_per_outp_t po) {
247
248	0	const asn_OCTET_STRING_specifics_t *specs = td->specifics
249	0	? (const asn_OCTET_STRING_specifics_t *)td->specifics
250	0	: &asn_SPC_OCTET_STRING_specs;
251	0	const asn_per_constraints_t *pc = constraints
252	0	? constraints
253	0	: td->encoding_constraints.per_constraints;
254	0	const asn_per_constraint_t *cval;
255	0	const asn_per_constraint_t *csiz;
256	0	const BIT_STRING_t st = (const BIT_STRING_t )sptr;
257	0	asn_enc_rval_t er = { 0, 0, 0 };
258	0	int inext = 0; /* Lies not within extension root */
259	0	unsigned int unit_bits;
260	0	unsigned int canonical_unit_bits;
261	0	unsigned int sizeinunits;
262	0	const uint8_t *buf;
263	0	int ret;
264	0	enum {
265	0	OS__BPC_BIT = 0,
266	0	OS__BPC_CHAR = 1,
267	0	OS__BPC_U16 = 2,
268	0	OS__BPC_U32 = 4
269	0	} bpc; /* Bytes per character */
270	0	int ct_extensible;
271
272	0	if(!st \|\| (!st->buf && st->size))
273	0	ASN__ENCODE_FAILED;
274
275	0	if(pc) {
276	0	cval = &pc->value;
277	0	csiz = &pc->size;
278	0	} else {
279	0	cval = &asn_DEF_OCTET_STRING_constraints.value;
280	0	csiz = &asn_DEF_OCTET_STRING_constraints.size;
281	0	}
282	0	ct_extensible = csiz->flags & APC_EXTENSIBLE;
283
284	0	switch(specs->subvariant) {
285	0	case ASN_OSUBV_ANY:
286	0	case ASN_OSUBV_STR:
287	0	canonical_unit_bits = unit_bits = 8;
288	0	if(cval->flags & APC_CONSTRAINED) {
289		/* follow power of 2 rule */
290	0	if (cval->range_bits <= 2) {
291	0	unit_bits = 2;
292	0	} else {
293	0	if (cval->range_bits <= 4)
294	0	unit_bits = 4;
295		/* otherwise, unit_bits = 8; */
296	0	}
297		/* unit_bits = cval->range_bits; */
298	0	ASN_DEBUG("APER encoding ASN_OSUBV_STR range_bits = %d unit_bits = %d\n",
299	0	cval->range_bits, unit_bits);
300	0	}
301	0	bpc = OS__BPC_CHAR;
302	0	sizeinunits = st->size;
303	0	break;
304	0	case ASN_OSUBV_U16:
305	0	canonical_unit_bits = unit_bits = 16;
306	0	if(cval->flags & APC_CONSTRAINED) {
307	0	unit_bits = cval->range_bits;
308	0	ASN_DEBUG("APER encoding ASN_OSUBV_U16 range_bits = %d\n", cval->range_bits);
309	0	}
310	0	bpc = OS__BPC_U16;
311	0	sizeinunits = st->size / 2;
312	0	break;
313	0	case ASN_OSUBV_U32:
314	0	canonical_unit_bits = unit_bits = 32;
315	0	if(cval->flags & APC_CONSTRAINED) {
316	0	unit_bits = cval->range_bits;
317	0	ASN_DEBUG("APER encoding ASN_OSUBV_U32 range_bits = %d\n", cval->range_bits);
318	0	}
319	0	bpc = OS__BPC_U32;
320	0	sizeinunits = st->size / 4;
321	0	break;
322		/*
323		case ASN_OSUBV_ANY:
324		ASN__ENCODE_FAILED;
325		*/
326	0	case ASN_OSUBV_BIT:
327	0	default:
328	0	canonical_unit_bits = unit_bits = 1;
329	0	bpc = OS__BPC_BIT;
330	0	sizeinunits = st->size * 8 - (st->bits_unused & 0x07);
331	0	ASN_DEBUG("BIT STRING of %d bytes", sizeinunits);
332	0	break;
333	0	}
334
335	0	ASN_DEBUG("Encoding %s into %d units of %d bits"
336	0	" (%lld..%lld, effective %d)%s",
337	0	td->name, sizeinunits, unit_bits,
338	0	(long long int)csiz->lower_bound,
339	0	(long long int)csiz->upper_bound,
340	0	csiz->effective_bits, ct_extensible ? " EXT" : "");
341
342		/* Figure out wheter size lies within PER visible constraint */
343
344	0	if(csiz->effective_bits >= 0) {
345	0	if((int)sizeinunits < csiz->lower_bound
346	0	\|\| (int)sizeinunits > csiz->upper_bound) {
347	0	if(ct_extensible) {
348	0	cval = &asn_DEF_OCTET_STRING_constraints.value;
349	0	csiz = &asn_DEF_OCTET_STRING_constraints.size;
350	0	unit_bits = canonical_unit_bits;
351	0	inext = 1;
352	0	} else
353	0	ASN__ENCODE_FAILED;
354	0	}
355	0	} else {
356	0	inext = 0;
357	0	}
358
359	0	if(ct_extensible) {
360		/* Declare whether length is [not] within extension root */
361	0	if(per_put_few_bits(po, inext, 1))
362	0	ASN__ENCODE_FAILED;
363	0	}
364
365		/* X.691, #16.5: zero-length encoding */
366		/* X.691, #16.6: short fixed length encoding (up to 2 octets) */
367		/* X.691, #16.7: long fixed length encoding (up to 64K octets) */
368	0	if(csiz->effective_bits >= 0) {
369	0	ASN_DEBUG("Encoding %zu bytes (%lld), length in %d bits",
370	0	st->size, (long long int)(sizeinunits - csiz->lower_bound),
371	0	csiz->effective_bits);
372	0	if (csiz->effective_bits > 0) {
373	0	ret = aper_put_length(po, csiz->lower_bound, csiz->upper_bound,
374	0	sizeinunits - csiz->lower_bound, NULL);
375	0	if(ret < 0) ASN__ENCODE_FAILED;
376	0	}
377	0	if (csiz->effective_bits > 0 \|\| (st->size > 2)
378	0	\|\| (csiz->upper_bound > (2 * 8 / unit_bits))
379	0	\|\| (csiz->range_bits != 0))
380	0	{ /* X.691 #16 NOTE 1 for fixed length (<=16 bits) strings*/
381	0	if (aper_put_align(po) < 0)
382	0	ASN__ENCODE_FAILED;
383	0	}
384	0	if(bpc) {
385	0	ret = OCTET_STRING_per_put_characters(po, st->buf,
386	0	sizeinunits,
387	0	bpc, unit_bits,
388	0	cval->lower_bound,
389	0	cval->upper_bound,
390	0	pc);
391	0	} else {
392	0	ret = per_put_many_bits(po, st->buf,
393	0	sizeinunits * unit_bits);
394	0	}
395	0	if(ret) ASN__ENCODE_FAILED;
396	0	ASN__ENCODED_OK(er);
397	0	}
398
399	0	ASN_DEBUG("Encoding %zu bytes", st->size);
400
401	0	if(sizeinunits == 0) {
402	0	if(aper_put_length(po, -1, -1, 0, NULL) < 0)
403	0	ASN__ENCODE_FAILED;
404	0	ASN__ENCODED_OK(er);
405	0	}
406
407	0	buf = st->buf;
408	0	while(sizeinunits) {
409	0	int need_eom = 0;
410	0	ssize_t maySave = aper_put_length(po, -1, -1, sizeinunits, &need_eom);
411
412	0	if(maySave < 0) ASN__ENCODE_FAILED;
413
414	0	ASN_DEBUG("Encoding %ld of %ld",
415	0	(long)maySave, (long)sizeinunits);
416
417	0	if(bpc) {
418	0	ret = OCTET_STRING_per_put_characters(po, buf, maySave,
419	0	bpc, unit_bits,
420	0	cval->lower_bound,
421	0	cval->upper_bound,
422	0	pc);
423	0	} else {
424	0	ret = per_put_many_bits(po, buf, maySave * unit_bits);
425	0	}
426	0	if(ret) ASN__ENCODE_FAILED;
427
428	0	if(bpc)
429	0	buf += maySave * bpc;
430	0	else
431	0	buf += maySave >> 3;
432	0	sizeinunits -= maySave;
433	0	assert(!(maySave & 0x07) \|\| !sizeinunits);
434	0	if(need_eom && (aper_put_length(po, -1, -1, 0, NULL) < 0))
435	0	ASN__ENCODE_FAILED; /* End of Message length */
436	0	}
437
438	0	ASN__ENCODED_OK(er);
439	0	}