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In public key infrastructure (PKI) systems, a certificate signing request (CSR or certification request) is a message sent from an applicant to a certificate authority of the public key infrastructure (PKI) in order to apply for a digital identity certificate. The CSR usually contains the public key for which the certificate should be issued ...
.p7r – response to CSR. Contains the newly-signed certificate, and the CA's own cert..p7s - Digital Signature. May contain the original signed file or message. Used in S/MIME for email signing. Defined in RFC 2311..p7m - Message (SignedData, EnvelopedData) e.g. encrypted ("enveloped") file, message or MIME email letter. Defined in RFC 2311.
OpenSSL is a software library for applications that provide secure communications over computer networks against eavesdropping, and identify the party at the other end. It is widely used by Internet servers, including the majority of HTTPS websites. OpenSSL contains an open-source implementation of the SSL and TLS protocols.
SSLeay is an open-source SSL implementation. It was developed by Eric Andrew Young [1] and Tim J. Hudson as an SSL 3.0 implementation using RC2 and RC4 encryption. [2] The recommended pronunciation is to say each letter s-s-l-e-a-y and was first developed by Eric A. Young ("eay"). [3]
Due to the use of the self-signed PKCS#10 format for Certificate Signing Requests (CSR), certificates can be enrolled only for keys that support (some form of) signing. A limitation shared by other enrollment protocols based on PKCS#10 CSRs, e.g., EST and ACME , or even the web-based enrollment workflow of most PKI software where the requester ...
Application-Layer Protocol Negotiation (ALPN) is a Transport Layer Security (TLS) extension that allows the application layer to negotiate which protocol should be performed over a secure connection in a manner that avoids additional round trips and which is independent of the application-layer protocols.
Self-contained messages with protection independent of transfer mechanism – as opposed to related protocols EST and SCEP, this supports end-to-end security.; Full certificate life-cycle support: an end entity can utilize CMP to obtain certificates from a CA, request updates for them, and also get them revoked.
In practice, a web site operator obtains a certificate by applying to a certificate authority with a certificate signing request. The certificate request is an electronic document that contains the web site name, company information and the public key. The certificate provider signs the request, thus producing a public certificate.