01-09-2008
sed replace encoded string
I'm trying to replace the string %2d from a text file using sed, and I can't seem to find the right key combination. I've tried:
sed 's/%2d/-/' foo
The above doesn't work, presumably because of the %.
Interestingly, I don't get any kind of error message at all. It appears to succeed, but when I vi the file, the %2d string is still present throughout the file. Can anyone help me figure out which magic phrase to invoke here?
Thanks!
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LEARN ABOUT MOJAVE
curlopt_proxy_pinnedpublickey
CURLOPT_PROXY_PINNEDPUBLICKEY(3) curl_easy_setopt options CURLOPT_PROXY_PINNEDPUBLICKEY(3)
NAME
CURLOPT_PROXY_PINNEDPUBLICKEY - set pinned public key for https proxy
SYNOPSIS
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_PINNEDPUBLICKEY, char *pinnedpubkey);
DESCRIPTION
Pass a pointer to a zero terminated string as parameter. The string can be the file name of your pinned public key. The file format
expected is "PEM" or "DER". The string can also be any number of base64 encoded sha256 hashes preceded by "sha256//" and separated by ";"
When negotiating a TLS or SSL connection, the https proxy sends a certificate indicating its identity. A public key is extracted from this
certificate and if it does not exactly match the public key provided to this option, curl will abort the connection before sending or
receiving any data.
On mismatch, CURLE_SSL_PINNEDPUBKEYNOTMATCH is returned.
The application does not have to keep the string around after setting this option.
DEFAULT
NULL
PROTOCOLS
All TLS based protocols: HTTPS, FTPS, IMAPS, POP3S, SMTPS etc.
EXAMPLE
TODO
PUBLIC KEY EXTRACTION
If you do not have the https proxy server's public key file you can extract it from the https proxy server's certificate.
# retrieve the server's certificate if you don't already have it
#
# be sure to examine the certificate to see if it is what you expected
#
# Windows-specific:
# - Use NUL instead of /dev/null.
# - OpenSSL may wait for input instead of disconnecting. Hit enter.
# - If you don't have sed, then just copy the certificate into a file:
# Lines from -----BEGIN CERTIFICATE----- to -----END CERTIFICATE-----.
#
openssl s_client -servername www.example.com -connect www.example.com:443 < /dev/null | sed -n "/-----BEGIN/,/-----END/p" > www.example.com.pem
# extract public key in pem format from certificate
openssl x509 -in www.example.com.pem -pubkey -noout > www.example.com.pubkey.pem
# convert public key from pem to der
openssl asn1parse -noout -inform pem -in www.example.com.pubkey.pem -out www.example.com.pubkey.der
# sha256 hash and base64 encode der to string for use
openssl dgst -sha256 -binary www.example.com.pubkey.der | openssl base64
The public key in PEM format contains a header, base64 data and a footer:
-----BEGIN PUBLIC KEY-----
[BASE 64 DATA]
-----END PUBLIC KEY-----
AVAILABILITY
PEM/DER support:
7.52.0: GSKit, GnuTLS, NSS, OpenSSL, PolarSSL, mbedtls, wolfSSL/CyaSSL
sha256 support:
7.52.0: GnuTLS, NSS, OpenSSL, PolarSSL, mbedtls, wolfSSL/CyaSSL
Other SSL backends not supported.
RETURN VALUE
Returns CURLE_OK if TLS enabled, CURLE_UNKNOWN_OPTION if not, or CURLE_OUT_OF_MEMORY if there was insufficient heap space.
SEE ALSO
CURLOPT_PROXY_SSL_VERIFYPEER(3), CURLOPT_PROXY_SSL_VERIFYHOST(3), CURLOPT_PROXY_CAINFO(3), CURLOPT_PROXY_CAPATH(3),
libcurl 7.54.0 December 21, 2016 CURLOPT_PROXY_PINNEDPUBLICKEY(3)