Ignore text around the certificate delimiter(s).

[srkolb]

Some PEM files have the base64 decoded cert in it. I changed PEMUtils.read_certificate to ignore text before and after the certificate delimiter.

A PEM file that looked like this does validate using openssl verify and used to work with an older version of this gem:

Certificate:
    Data:
        Version: 3 (0x2)
        Serial Number: 104495 (0x1982f)
    Signature Algorithm: sha1WithRSAEncryption
        Issuer: CN=Example CA, C=US, O=example.com
        Validity
            Not Before: Sep 19 20:11:48 2016 GMT
            Not After : May 11 20:11:48 2041 GMT
        Subject: C=US, ST=NJ, O=FOO, OU=BAR, CN=Somebody
        Subject Public Key Info:
            Public Key Algorithm: rsaEncryption
                Public-Key: (1024 bit)
                Modulus:
                    00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:
                    00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:
                    00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:
                    00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:
                    00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:
                    00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:
                    00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:
                    00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:
                Exponent: 65537 (0x10001)
        X509v3 extensions:
            X509v3 Basic Constraints:
                CA:FALSE
            X509v3 Subject Key Identifier:
                00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00
            X509v3 Authority Key Identifier:
                keyid:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00
                DirName:/CN=Example CA/C=US/O=example.com
                serial:00

            Netscape CA Revocation Url:
                https://www.sial.org/ca-crl.pem
    Signature Algorithm: sha1WithRSAEncryption
         00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:
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         00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:
         00:00:00:00
-----BEGIN CERTIFICATE-----
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA==
-----END CERTIFICATE-----

[nahi]

Thank you!