diff options
| author | android-build-team Robot <android-build-team-robot@google.com> | 2017-05-25 17:52:53 +0000 |
|---|---|---|
| committer | android-build-team Robot <android-build-team-robot@google.com> | 2017-05-25 17:52:53 +0000 |
| commit | 17a35b4ef3f6d38acd94c4ea2d4ccbdd311ba8a8 (patch) | |
| tree | f7665dd7b34aa5368957a3874d165272f2075ff3 | |
| parent | 0ea06423d0487dc75de77137d66f42cdb31e9990 (diff) | |
| parent | 72e9b9ed03689d2bab064f9f8bc81f17de4c61e1 (diff) | |
| download | boringssl-nougat-mr1.5-release.tar.gz | |
Merge cherrypicks of [2315763, 2315554, 2315573, 2315765, 2315712, 2315595, 2315713, 2315746, 2315786, 2315799, 2315576, 2315800, 2315673, 2315821, 2315578, 2315597, 2315633, 2315598, 2315769, 2315716, 2315634, 2315823, 2315801, 2315636, 2315717, 2315772, 2315753, 2315803, 2315638, 2315840, 2315841, 2315842, 2315824, 2315791, 2315879, 2315804, 2315827, 2315863, 2315792, 2315864, 2315755, 2315882, 2315756, 2315828, 2315793, 2315865, 2315883, 2315899, 2315885, 2315796, 2315869, 2315923, 2315924, 2315943] into nyc-mr1-security-e-releaseandroid-7.1.1_r57android-7.1.1_r55android-7.1.1_r52android-7.1.1_r48android-7.1.1_r45nougat-mr1.7-releasenougat-mr1.5-release
Change-Id: I2c41e79b49a0189c65c2a8c831d58f236e8641bb
| -rw-r--r-- | src/crypto/asn1/a_d2i_fp.c | 46 |
1 files changed, 31 insertions, 15 deletions
diff --git a/src/crypto/asn1/a_d2i_fp.c b/src/crypto/asn1/a_d2i_fp.c index 97ec75b5..af03bc0c 100644 --- a/src/crypto/asn1/a_d2i_fp.c +++ b/src/crypto/asn1/a_d2i_fp.c @@ -140,6 +140,7 @@ void *ASN1_item_d2i_fp(const ASN1_ITEM *it, FILE *in, void *x) #endif #define HEADER_SIZE 8 +#define ASN1_CHUNK_INITIAL_SIZE (16 * 1024) static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb) { BUF_MEM *b; @@ -231,6 +232,7 @@ static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb) want=c.slen; if (want > (len-off)) { + size_t chunk_max = ASN1_CHUNK_INITIAL_SIZE; want-=(len-off); if (want > INT_MAX /* BIO_read takes an int length */ || len+want < len) @@ -238,23 +240,37 @@ static int asn1_d2i_read_bio(BIO *in, BUF_MEM **pb) OPENSSL_PUT_ERROR(ASN1, ASN1_R_TOO_LONG); goto err; } - if (!BUF_MEM_grow_clean(b,len+want)) - { - OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE); - goto err; - } while (want > 0) { - i=BIO_read(in,&(b->data[len]),want); - if (i <= 0) - { - OPENSSL_PUT_ERROR(ASN1, ASN1_R_NOT_ENOUGH_DATA); - goto err; - } - /* This can't overflow because - * |len+want| didn't overflow. */ - len+=i; - want-=i; + + /* + * Read content in chunks of increasing size + * so we can return an error for EOF without + * having to allocate the entire content length + * in one go. + */ + size_t chunk = want > chunk_max ? chunk_max : want; + + if (!BUF_MEM_grow_clean(b, len + chunk)) { + OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE); + goto err; + } + want -= chunk; + while (chunk > 0) { + i = BIO_read(in, &(b->data[len]), chunk); + if (i <= 0) { + OPENSSL_PUT_ERROR(ASN1, ASN1_R_NOT_ENOUGH_DATA); + goto err; + } + /* + * This can't overflow because |len+want| didn't + * overflow. + */ + len += i; + chunk -= i; + } + if (chunk_max < INT_MAX/2) + chunk_max *= 2; } } if (off + c.slen < off) |