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Fix SMIME_crlf_copy() to properly report an error 

If the BIO unexpectedly fails to flush then SMIME_crlf_copy() was not
correctly reporting the error. We modify it to properly propagate the
error condition.

Reviewed-by: Hugo Landau <hlandau@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/19918)
This commit is contained in:
Matt Caswell 2022-12-06 14:21:23 +00:00 committed by Tomas Mraz
parent e51dd6ee1b
commit 9e5bd8923b
2 changed files with 8 additions and 8 deletions
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6
crypto/asn1/asn_mime.c
View File

@ -515,6 +515,7 @@ int SMIME_crlf_copy(BIO *in, BIO *out, int flags)
char eol;
int len;
char linebuf[MAX_SMLEN];
int ret;
/*
* Buffer output so we don't write one line at a time. This is useful
* when streaming as we don't end up with one OCTET STRING per line.
@ -552,9 +553,12 @@ int SMIME_crlf_copy(BIO *in, BIO *out, int flags)
}
}
}
(void)BIO_flush(out);
ret = BIO_flush(out);
BIO_pop(out);
BIO_free(bf);
if (ret <= 0)
return 0;
return 1;
}

10
test/bio_memleak_test.c
View File

@ -261,13 +261,9 @@ static int test_bio_i2d_ASN1_mime(void)
error_callback_fired = 0;
/*
* The call succeeds even if the input stream ends unexpectedly as
* there is no handling for this case in SMIME_crlf_copy().
*/
if (!TEST_true(i2d_ASN1_bio_stream(out, (ASN1_VALUE*) p7, bio,
SMIME_STREAM | SMIME_BINARY,
ASN1_ITEM_rptr(PKCS7))))
if (!TEST_false(i2d_ASN1_bio_stream(out, (ASN1_VALUE*) p7, bio,
SMIME_STREAM | SMIME_BINARY,
ASN1_ITEM_rptr(PKCS7))))
goto finish;
if (!TEST_int_eq(error_callback_fired, 1))