Openssl v1.1.1d: pubkey_cb() returning SUCCESS for x509_pubkey_decode() Failure

[Brahmaji K]

Hi Team,

I'm trying to store the invalid EC certificate as a negative test for my
application. My application calls the X509_STORE_load_locations() to load
the certificate from a specific path. For invalid EC certificate it is
expected to FAIL but it is returning the SUCCESS.

I have done some debugging and found the following:

pubkey_cb() calls x509_pubkey_decode(), the x509_pubkey_decode() has the
check only for -1 as shown below:

 46         if (x509_pubkey_decode(&pubkey->pkey, pubkey) == -1)
 47             return 0;

But x509_pubkey_decode() can return zero ("0") also in the failure case. Is
there any intention to have the above check? or is it a known issue?

Call trace for more information:
#0  x509_pubkey_decode (ppkey=ppkey at entry=0x123d5ffd0,
    key=key at entry=0x123d5ffc0) at crypto/x509/x_pubkey.c:125
#1  0x00000001201f5888 in pubkey_cb (operation=operation at entry=5,
    pval=pval at entry=0x123d5fe40, it=it at entry=0x1206026c8,
    exarg=exarg at entry=0x0) at crypto/x509/x_pubkey.c:46
#2  0x0000000120152bac in asn1_item_embed_d2i (pval=pval at entry=0x123d5fe40,
    in=in at entry=0xffff654288, len=0, it=0x1206026c8, tag=<optimized out>,
    tag at entry=-1, aclass=<optimized out>, aclass at entry=0,
    opt=<optimized out>, ctx=ctx at entry=0xffff6546a0, depth=<optimized out>,
    depth at entry=2) at crypto/asn1/tasn_dec.c:413
#3  0x0000000120153660 in asn1_template_noexp_d2i (val=0x123d5fe40,
    in=0xffff6543a0, len=322, tt=0x120618ad8, opt=<optimized out>,
    ctx=0xffff6546a0, depth=<optimized out>) at crypto/asn1/tasn_dec.c:624
#4  0x0000000120153968 in asn1_template_ex_d2i (val=0x123d5fe40,
    in=in at entry=0xffff6543a0, inlen=<optimized out>, tt=tt at entry
=0x120618ad8,
    opt=<optimized out>, ctx=ctx at entry=0xffff6546a0, depth=depth at entry=2)
    at crypto/asn1/tasn_dec.c:499
#5  0x0000000120153064 in asn1_item_embed_d2i (pval=pval at entry=0xffff654490,
    in=in at entry=0xffff654488, len=322, it=0x1206027f8, tag=<optimized out>,
    tag at entry=-1, aclass=<optimized out>, aclass at entry=0,
    opt=<optimized out>, ctx=ctx at entry=0xffff6546a0, depth=2, depth at entry=1)
    at crypto/asn1/tasn_dec.c:363
#6  0x0000000120153660 in asn1_template_noexp_d2i (val=0xffff654490,
    in=0xffff6545a0, len=507, tt=0x120618970, opt=<optimized out>,
    ctx=0xffff6546a0, depth=<optimized out>) at crypto/asn1/tasn_dec.c:624
#7  0x0000000120153968 in asn1_template_ex_d2i (val=0x123d5fdf0,
    in=in at entry=0xffff6545a0, inlen=<optimized out>, tt=tt at entry
=0x120618970,
    opt=<optimized out>, ctx=ctx at entry=0xffff6546a0, depth=depth at entry=1)
    at crypto/asn1/tasn_dec.c:499
#8  0x0000000120153064 in asn1_item_embed_d2i (pval=pval at entry=0x123d5ef40,
    in=0xffff654710, len=507, it=it at entry=0x1206027c0, tag=<optimized out>,
    aclass=<optimized out>, opt=<optimized out>, ctx=0xffff6546a0, depth=1,
    depth at entry=0) at crypto/asn1/tasn_dec.c:363
#9  0x0000000120153ac8 in ASN1_item_ex_d2i (pval=0x123d5ef40,
    in=<optimized out>, len=<optimized out>, it=0x1206027c0,
    tag=<optimized out>, aclass=<optimized out>, opt=<optimized out>,
    ctx=<optimized out>) at crypto/asn1/tasn_dec.c:124
#10 0x0000000120153b60 in ASN1_item_d2i (pval=0x123d5ef40,
    in=<optimized out>, len=<optimized out>, it=<optimized out>)
    at crypto/asn1/tasn_dec.c:114
#11 0x00000001202cd744 in PEM_X509_INFO_read_bio (bp=0x123d5ee50, sk=0x0,
    cb=0, u=0x1204ca0c0) at crypto/pem/pem_info.c:195
#12 0x0000000120285fe8 in X509_load_cert_crl_file (file=<optimized out>,
    ctx=0x123d5f3c0, type=<optimized out>) at crypto/x509/by_file.c:202
#13 X509_load_cert_crl_file (ctx=0x123d5f3c0, file=<optimized out>,
    type=<optimized out>) at crypto/x509/by_file.c:188
#14 0x00000001202861c8 in by_file_ctrl (ctx=<optimized out>,
    cmd=<optimized out>, argp=<optimized out>, argl=<optimized out>,
    ret=<optimized out>) at crypto/x509/by_file.c:64
#15 0x00000001201e60ec in X509_STORE_load_locations (ctx=0x123d5f2c0,
    file=0xffff654868 "/certs/test.crt", path=0x0)
    at crypto/x509/x509_d2.c:44
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