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Diffstat (limited to 'pullimap.md')
| -rw-r--r-- | pullimap.md | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/pullimap.md b/pullimap.md index 06e5988..cb2a07a 100644 --- a/pullimap.md +++ b/pullimap.md @@ -210,12 +210,19 @@ Valid options are: *SSL_fingerprint* -: Fingerprint of the server certificate (or its public key) in the - form `[ALGO$]DIGEST_HEX`, where `ALGO` is the used algorithm - (by default `sha256`). +: Fingerprint of the server certificate's Subject Public Key Info, in + the form `[ALGO$]DIGEST_HEX` where `ALGO` is the used algorithm (by + default `sha256`). Attempting to connect to a server with a non-matching certificate - fingerprint causes `pullimap` to abort the connection during the - SSL/TLS handshake. + SPKI fingerprint causes `pullimap` to abort the connection during + the SSL/TLS handshake. + + You can use the following command to compute the SHA-256 digest of + certificate's Subject Public Key Info. + + openssl x509 -in /path/to/server/certificate.pem -pubkey \ + | openssl pkey -pubin -outform DER \ + | openssl dgst -sha256 *SSL_verify* |