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How do I read or write a DER encoded buffer using the ASN1 functions?

April 26, 2017ASN1 buffer DER encoded functions read write

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How do I read or write a DER encoded buffer using the ASN1 functions?

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You have two options. You can either use a memory BIO in conjunction with the i2d_*_bio() or d2i_*_bio() functions or you can use the i2d_*(), d2i_*() functions directly.