Is anybody aware that i2d_ASN1_STRING is buggy when a negative number is assigned?
I decared a sequence of two ASN1 integers and i2s function overlapped one byte to the
first integer.
int i2d_MMDH_VALUE(MMDH_VALUE *a, unsigned char **pp)
{
unsigned char *p1;
p1 = *pp;
M_ASN1_I2D_vars(a);
M_ASN1_I2D_len(a->f1, i2d_ASN1_INTEGER);
M_ASN1_I2D_len(a->f2, i2d_ASN1_INTEGER);
M_ASN1_I2D_len(a->currency, i2d_ASN1_IA5STRING);
M_ASN1_I2D_seq_total();
M_ASN1_I2D_put(a->f1, i2d_ASN1_INTEGER);
print_cert ( p1, p-p1+1 );
M_ASN1_I2D_put(a->f2, i2d_ASN1_INTEGER);
print_cert ( p1, p-p1+1 );
M_ASN1_I2D_put(a->currency, i2d_ASN1_IA5STRING);
print_cert ( p1, p-p1+1 );
M_ASN1_I2D_finish();
}
( f1, f2, currency) = { -128, -2, "USD" } returns somthing like
DER output =
30 [0] 0B [ ] 02 [ ] 01 [ ] 80 [ ]
DER output =
30 [0] 0B [ ] 02 [ ] 01 [ ] 02 [ ] 01 [ ] FE [ ]
DER output =
30 [0] 0B [ ] 02 [ ] 01 [ ] 02 [ ] 01 [ ] 16 [ ] 03 [ ]
55 [U] 53 [S] 44 [D] 40 [@]
DER output =
30 [0] 0B [ ] 02 [ ] 01 [ ] 02 [ ] 01 [ ] 16 [ ] 03 [ ]
55 [U] 53 [S] 44 [D] 40 [@] 8E [ ]
Notice that two bytes are left out at the end!
--Steve
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