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-rw-r--r--docs/cmdline-opts/key.d7
1 files changed, 7 insertions, 0 deletions
diff --git a/docs/cmdline-opts/key.d b/docs/cmdline-opts/key.d
index fbf583af0..4877b4238 100644
--- a/docs/cmdline-opts/key.d
+++ b/docs/cmdline-opts/key.d
@@ -7,4 +7,11 @@ Private key file name. Allows you to provide your private key in this separate
file. For SSH, if not specified, curl tries the following candidates in order:
'~/.ssh/id_rsa', '~/.ssh/id_dsa', './id_rsa', './id_dsa'.
+If curl is built against OpenSSL library, and the engine pkcs11 is available,
+then a PKCS#11 URI (RFC 7512) can be used to specify a private key located in a
+PKCS#11 device. A string beginning with "pkcs11:" will be interpreted as a
+PKCS#11 URI. If a PKCS#11 URI is provided, then the --engine option will be set
+as "pkcs11" if none was provided and the --key-type option will be set as
+"ENG" if none was provided.
+
If this option is used several times, the last one will be used.