Add more help for certificate errors

fixtures/chain-intermediate.crt

@@ -0,0 +1,18 @@
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----

fixtures/chain-intermediate.key

@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----
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+-----END PRIVATE KEY-----

fixtures/chain-leaf.crt

@@ -0,0 +1,20 @@
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----

fixtures/chain-leaf.key

@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----
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+-----END PRIVATE KEY-----

fixtures/chain-root.crt

@@ -0,0 +1,18 @@
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----

fixtures/chain-root.key

@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----
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+-----END PRIVATE KEY-----

fixtures/chain.crt

@@ -0,0 +1,56 @@
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----
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+XTWGWgXMVeacm/0W+3XmQWtltDnBQq8fUsEy0Uts6fJdD/5tEmvYfwEtpomxdFds
+-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----
+MIIC5TCCAc2gAwIBAgIUXtcOjsFS175nGr07+htPEPGe2bYwDQYJKoZIhvcNAQEL
+BQAwFDESMBAGA1UEAwwJVEVTVC1yb290MB4XDTIzMDgwMTAxNDUxM1oXDTMzMDcy
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+PaDKL+Ygt0c2hX5TRVJQ2Bdvn5z5kkBJxT7Rb9uj8kT9JETbwQD3bssZB+tPkwvE
+O5mpOpR0Jkni8lJmOYrRYz9Jf9Cm0uQWlw==
+-----END CERTIFICATE-----

fixtures/chain.key

@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----
+MIIEvAIBADANBgkqhkiG9w0BAQEFAASCBKYwggSiAgEAAoIBAQCiLsCk5U0Xb0VS
+RaHJNd1q/X2aAgf7EPGi/4ul6XpZp8gT3iRu6sErsRc33JS2svKRN0eRMXduvTO3
+q9S6aGgMAZUzy7jlDUzgRu8AckEiOATxfvb+4Bz0zGy/pVw0bIUiYDMOeJ8RgX0M
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+QxK0XtQ7AgMBAAECggEAAmfHG6r69boEwS+fMqjF2+xejIYzMBoUO2Km45MO6X1/
+jivhRnPc4ZUCzyVKX1tQFa9INHMTXmUX+0VlJk6eHG95kwcWeu8zkK/8o3kOVj+W
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+rbj7mYepWhI6kLMdrkWgfQrWdalA6whlMmeIDfKsak116eIRtuPXNvrzAoGAUVHW
+TTgaot67QpPCCuEPdgUeX02JqO2S8ttz5W82h52TVIjx/+pBcy+0j7H7mRpGoZps
+yHaf6cYlFaNHK6kHl1+AXLXxVr2z3KKXEyR0SsWo/dSKJvrDtWpOF4XYvGzwJaAQ
+on5UY7bVxQLwvNt8qNnYXttpEeyVzYrME4mY6h0CgYBBVY08DRSkrrBwiY9sQWbF
+XVdWuffdLuuI27lVcBl0UwJh37EwXN0fsWhZ3upAitAzE3aBNwF5KHvq00yCsMKr
+A4bo7DeckePIfCAxdvp8kAuq+NwW8tkpMcqeb1ja2TPrgSy9eyHingzvMtYNDTxB
+i45lVy8xNJU85Fmzex0B0g==
+-----END PRIVATE KEY-----

fixtures/generate.bash

@@ -0,0 +1,134 @@
+#!/usr/bin/env bash
+
+set -xeuo pipefail
+
+function prepare() {
+  local cwd=$1
+  local fwd=$(readlink -f "$cwd")
+  mkdir -p "$cwd"/{certs,crl,newcerts,private}
+  echo 1000 > "$cwd/serial"
+  touch "$cwd"/{index.txt,index.txt.attr}
+
+  echo '
+     [ ca ]
+     default_ca = CA_default
+     [ CA_default ]
+     dir            = '"$fwd"'
+     certs          = $dir/certs               # Where the issued certs are kept
+     crl_dir        = $dir/crl                 # Where the issued crl are kept
+     database       = $dir/index.txt           # database index file.
+     new_certs_dir  = $dir/newcerts            # default place for new certs.
+     certificate    = $dir/cacert.pem          # The CA certificate
+     serial         = $dir/serial              # The current serial number
+     crl            = $dir/crl.pem             # The current CRL
+     private_key    = $dir/private/ca.key.pem  # The private key
+     RANDFILE       = $dir/.rnd                # private random number file
+     nameopt        = default_ca
+     certopt        = default_ca
+     policy         = policy_match
+     default_days   = 365
+     default_md     = sha256
+
+     [ policy_match ]
+     countryName            = optional
+     stateOrProvinceName    = optional
+     organizationName       = optional
+     organizationalUnitName = optional
+     commonName             = supplied
+     emailAddress           = optional
+
+     [req]
+     req_extensions = v3_req
+     distinguished_name = req_distinguished_name
+
+     [req_distinguished_name]
+
+     [v3_req]' > "$cwd/openssl.cnf"
+
+  if [[ $cwd == out ]] ; then
+    echo "keyUsage = digitalSignature, keyEncipherment" >> "$cwd/openssl.cnf"
+    echo "extendedKeyUsage = serverAuth, clientAuth" >> "$cwd/openssl.cnf"
+    echo "subjectAltName = DNS:localhost" >> "$cwd/openssl.cnf"
+  else
+    echo "basicConstraints = CA:TRUE" >> "$cwd/openssl.cnf"
+  fi
+}
+
+# chain generates three certificates in a chain.
+function chain() {
+  rm {root,intermediate,out} -rf
+  prepare root
+  prepare intermediate
+  prepare out
+
+  # Create root certificate and key.
+  openssl genrsa -out root/private/ca.key 2048
+  openssl req -new -x509 -sha256 -days 3650 \
+          -config root/openssl.cnf -extensions v3_req \
+          -key root/private/ca.key --out root/certs/ca.crt \
+          -subj '/CN=TEST-root'
+
+  # Create intermediate key and request.
+  openssl genrsa -out intermediate/private/intermediate.key 2048
+  openssl req -new -sha256 \
+          -config intermediate/openssl.cnf -extensions v3_req \
+          -key intermediate/private/intermediate.key -out intermediate/certs/intermediate.csr \
+          -subj '/CN=TEST-intermediate'
+
+  # Sign intermediate request with root to create a cert.
+  openssl ca -batch -notext -md sha256 \
+          -config intermediate/openssl.cnf -extensions v3_req \
+          -keyfile root/private/ca.key -cert root/certs/ca.crt \
+          -in intermediate/certs/intermediate.csr \
+          -out intermediate/certs/intermediate.crt
+
+  # Create a key and request for an end certificate.
+  openssl req -new -days 365 -nodes -newkey rsa:2048 \
+          -config out/openssl.cnf -extensions v3_req \
+          -keyout out/private/localhost.key -out out/certs/localhost.csr \
+          -subj "/CN=localhost"
+
+  # Sign that with the intermediate.
+  openssl ca -batch \
+          -config out/openssl.cnf -extensions v3_req \
+          -keyfile intermediate/private/intermediate.key -cert intermediate/certs/intermediate.crt \
+          -out out/certs/localhost.crt \
+          -infiles out/certs/localhost.csr
+
+  mv out/certs/localhost.crt chain-leaf.crt
+  mv out/private/localhost.key chain-leaf.key
+  mv intermediate/certs/intermediate.crt chain-intermediate.crt
+  mv intermediate/private/intermediate.key chain-intermediate.key
+  mv root/certs/ca.crt chain-root.crt
+  mv root/private/ca.key chain-root.key
+
+  rm {out,intermediate,root} -r
+
+  cat chain-leaf.crt chain-intermediate.crt chain-root.crt > chain.crt
+  cp chain-leaf.key chain.key
+}
+
+# non-signing generates a self-signed certificate that has cert signing
+# explicitly omitted.
+function non-signing() {
+  openssl req -x509 -nodes -newkey rsa:2048 \
+          -keyout no-signing.key -out no-signing.crt \
+          -addext "keyUsage = digitalSignature, keyEncipherment" \
+          -addext "subjectAltName=DNS:localhost" \
+          -subj "/CN=localhost"
+}
+
+# self-signed generates a certificate without specifying key usage.
+function self-signed() {
+  openssl req -x509 -nodes -newkey rsa:2048 \
+          -keyout self-signed.key -out self-signed.crt \
+          -addext "subjectAltName=DNS:localhost" \
+          -subj "/CN=localhost"
+}
+
+function main() {
+  local name=$1 ; shift
+  "$name" "$@"
+}
+
+main "$@"

fixtures/no-signing.crt

@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE-----
+MIIDLDCCAhSgAwIBAgIUZVpY6+MUJZuW/UJhu7r8crizzh0wDQYJKoZIhvcNAQEL
+BQAwFDESMBAGA1UEAwwJbG9jYWxob3N0MB4XDTIzMDgwMTAxMDQ0OFoXDTIzMDgz
+MTAxMDQ0OFowFDESMBAGA1UEAwwJbG9jYWxob3N0MIIBIjANBgkqhkiG9w0BAQEF
+AAOCAQ8AMIIBCgKCAQEAzIxlOvO0DmWd0a2dA3f3uy6VuQ6kLHp+D4QNUvzAqSGE
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+s1sGtEpSUwhNiMEypJJbDhDJ6S5pn9lqDbSoCiRjXufq3ltu90Zht+2kCUCjTSBb
+-----END CERTIFICATE-----