| #undef NDEBUG |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <sys/types.h> |
| #include <string.h> |
| #include <assert.h> |
| |
| #include <T.h> |
| |
| |
| uint8_t buf1[] = { |
| 32 | (2 << 6), /* [0], constructed */ |
| 25, /* L */ |
| |
| /* string [0] IMPLICIT UTF8String, */ |
| (2 << 6), /* [0] */ |
| 16, /* L */ |
| 'z', 'z', 'z', 'z', 'z', 'z', 'z', 'z', 'z', 'z', 'z', 'z', 'z', 'z', 'z', 'z', |
| |
| /* beta [2] IMPLICIT INTEGER OPTIONAL */ |
| (2 << 6) + 2, /* [2] */ |
| 5, /* L */ |
| 0, |
| 75, |
| 0x4b, |
| 75, |
| 75, |
| }; |
| |
| uint8_t buf1_reconstr[] = { |
| 32 | (2 << 6), /* [0], constructed */ |
| 24, /* L */ |
| |
| /* string [0] IMPLICIT UTF8String, */ |
| (2 << 6), /* [0] */ |
| 16, /* L */ |
| 'z', 'z', 'z', 'z', 'z', 'z', 'z', 'z', 'z', 'z', 'z', 'z', 'z', 'z', 'z', 'z', |
| |
| /* beta [2] IMPLICIT INTEGER OPTIONAL */ |
| (2 << 6) + 2, /* [2] */ |
| 4, /* L */ |
| 75, |
| 75, |
| 75, |
| 0x4b, |
| }; |
| |
| |
| static void |
| check(T_t *tp, uint8_t *buf, size_t size, size_t consumed) { |
| asn_dec_rval_t rval; |
| |
| tp = memset(tp, 0, sizeof(*tp)); |
| |
| fprintf(stderr, "Buf %p (%zd)\n", buf, size); |
| rval = ber_decode(0, &asn_DEF_T, (void **)&tp, buf, size); |
| fprintf(stderr, "Returned code %d, consumed %zd\n", |
| (int)rval.code, rval.consumed); |
| |
| assert(rval.code == RC_OK); |
| assert(rval.consumed == consumed); |
| |
| assert(tp->choice.seq.string.size == 16); |
| assert(strcmp((char *)tp->choice.seq.string.buf, "zzzzzzzzzzzzzzzz") == 0); |
| assert(tp->choice.seq.alpha == NULL); |
| assert(tp->choice.seq.beta); |
| assert(*tp->choice.seq.beta == 0x4b4b4b4b); |
| } |
| |
| size_t buf_pos; |
| size_t buf_size; |
| uint8_t *buf; |
| |
| static int |
| buf_fill(const void *buffer, size_t size, void *app_key) { |
| |
| (void)app_key; /* Unused argument */ |
| |
| if(buf_pos + size > buf_size) { |
| fprintf(stderr, "%zd + %zd > %zd\n", |
| buf_pos, size, buf_size); |
| return -1; |
| } |
| |
| memcpy(buf + buf_pos, buffer, size); |
| buf_pos += size; |
| fprintf(stderr, " written %zd (%zd)\n", size, buf_pos); |
| |
| return 0; |
| } |
| |
| static void |
| compare(T_t *tp, uint8_t *cmp_buf, int cmp_buf_size) { |
| asn_enc_rval_t erval; |
| int i; |
| |
| buf_size = cmp_buf_size + 100; |
| uint8_t scratch[buf_size]; |
| buf = scratch; |
| buf_pos = 0; |
| |
| /* |
| * Try to re-create using DER encoding. |
| */ |
| erval = der_encode(&asn_DEF_T, tp, buf_fill, 0); |
| assert(erval.encoded != -1); |
| if(erval.encoded != cmp_buf_size) { |
| printf("%zd != %zd\n", erval.encoded, cmp_buf_size); |
| } |
| assert(erval.encoded == cmp_buf_size); |
| for(i = 0; i < cmp_buf_size; i++) { |
| if(buf[i] != cmp_buf[i]) { |
| fprintf(stderr, "Recreated buffer content mismatch:\n"); |
| fprintf(stderr, "Byte %d, %x != %x (%d != %d)\n", |
| i, |
| buf[i], cmp_buf[i], |
| buf[i], cmp_buf[i] |
| ); |
| } |
| assert(buf[i] == cmp_buf[i]); |
| } |
| |
| buf = 0; |
| } |
| |
| static void |
| partial_read(uint8_t *buf_0, size_t size) { |
| T_t t, *tp; |
| asn_dec_rval_t rval; |
| uint8_t buf_1[size]; |
| uint8_t buf_2[size]; |
| uint8_t buf_3[size]; |
| |
| fprintf(stderr, "\nPartial read sequence...\n"); |
| |
| /* |
| * Divide the space (size) into three blocks in various combinations: |
| * |<----->i1<----->i2<----->| |
| * ^ buf_0 ^ buf_0+size |
| * Try to read block by block. |
| */ |
| for(size_t i1 = 0; i1 < size; i1++) { |
| for(size_t i2 = i1; i2 < size; i2++) { |
| uint8_t *chunk1 = buf_0; |
| size_t size1 = i1; |
| uint8_t *chunk2 = buf_0 + size1; |
| size_t size2 = i2 - i1; |
| uint8_t *chunk3 = buf_0 + size1 + size2; |
| size_t size3 = size - size1 - size2; |
| |
| fprintf(stderr, "\n%zd:{%zd, %zd, %zd}...\n", |
| size, size1, size2, size3); |
| |
| memset(buf_1, 0, size); |
| memset(buf_2, 0, size); |
| memset(buf_3, 0, size); |
| memcpy(buf_1, chunk1, size1); |
| memcpy(buf_2, chunk2, size2); |
| memcpy(buf_3, chunk3, size3); |
| |
| tp = memset(&t, 0, sizeof(t)); |
| |
| fprintf(stderr, "=> Chunk 1 (%zd):\n", size1); |
| rval = ber_decode(0, &asn_DEF_T, (void **)&tp, |
| buf_1, size1); |
| assert(rval.code == RC_WMORE); |
| assert(rval.consumed <= size1); |
| if(rval.consumed < size1) { |
| int leftover = size1 - rval.consumed; |
| memcpy(buf_2, buf_1 + rval.consumed, leftover); |
| memcpy(buf_2 + leftover, chunk2, size2); |
| size2 += leftover; |
| } |
| |
| fprintf(stderr, "=> Chunk 2 (%zd):\n", size2); |
| rval = ber_decode(0, &asn_DEF_T, (void **)&tp, |
| buf_2, size2); |
| assert(rval.code == RC_WMORE); |
| assert(rval.consumed <= size2); |
| if(rval.consumed < size2) { |
| int leftover = size2 - rval.consumed; |
| memcpy(buf_3, buf_2 + rval.consumed, leftover); |
| memcpy(buf_3 + leftover, chunk3, size3); |
| size3 += leftover; |
| } |
| |
| fprintf(stderr, "=> Chunk 3 (%zd):\n", size3); |
| rval = ber_decode(0, &asn_DEF_T, (void **)&tp, |
| buf_3, size3); |
| assert(rval.code == RC_OK); |
| assert(rval.consumed == size3); |
| |
| ASN_STRUCT_RESET(asn_DEF_T, &t); |
| } |
| } |
| } |
| |
| int |
| main(int ac, char **av) { |
| T_t t; |
| |
| (void)ac; /* Unused argument */ |
| (void)av; /* Unused argument */ |
| |
| /* Check exact buf1 */ |
| check(&t, buf1, sizeof(buf1), sizeof(buf1)); |
| compare(&t, buf1_reconstr, sizeof(buf1_reconstr)); |
| asn_fprint(stderr, &asn_DEF_T, &t); |
| ASN_STRUCT_RESET(asn_DEF_T, &t); |
| |
| /* Check slightly more than buf1 */ |
| check(&t, buf1, sizeof(buf1) + 10, sizeof(buf1)); |
| compare(&t, buf1_reconstr, sizeof(buf1_reconstr)); |
| asn_fprint(stderr, &asn_DEF_T, &t); |
| ASN_STRUCT_RESET(asn_DEF_T, &t); |
| |
| /* Split the buffer in parts and check decoder restartability */ |
| partial_read(buf1, sizeof(buf1)); |
| |
| return 0; |
| } |