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fix: Remove underscore from RFC-1123 based regex (#912)

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RFC-1123 is based on RFC-952, which doesn't allow underscores. RFC-1123
must be therefore implemented with the same constraint to disallow
underscores in host names.
This commit is contained in:
Stefan Dillenburg 2022-05-01 17:32:50 +02:00 • committed by GitHub
parent aea8782168
commit f2d3ff7f98
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2 changed files with 8 additions and 6 deletions
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12
regexes.go
View file

@ -37,12 +37,12 @@ const (
latitudeRegexString = "^[-+]?([1-8]?\\d(\\.\\d+)?|90(\\.0+)?)$"
longitudeRegexString = "^[-+]?(180(\\.0+)?|((1[0-7]\\d)|([1-9]?\\d))(\\.\\d+)?)$"
sSNRegexString = `^[0-9]{3}[ -]?(0[1-9]|[1-9][0-9])[ -]?([1-9][0-9]{3}|[0-9][1-9][0-9]{2}|[0-9]{2}[1-9][0-9]|[0-9]{3}[1-9])$`
hostnameRegexStringRFC952 = `^[a-zA-Z]([a-zA-Z0-9\-]+[\.]?)*[a-zA-Z0-9]$` // https://tools.ietf.org/html/rfc952
hostnameRegexStringRFC1123 = `^([a-zA-Z0-9]{1}[a-zA-Z0-9_-]{0,62}){1}(\.[a-zA-Z0-9_]{1}[a-zA-Z0-9_-]{0,62})*?$` // accepts hostname starting with a digit https://tools.ietf.org/html/rfc1123
fqdnRegexStringRFC1123 = `^([a-zA-Z0-9]{1}[a-zA-Z0-9_-]{0,62})(\.[a-zA-Z0-9_]{1}[a-zA-Z0-9_-]{0,62})*?(\.[a-zA-Z]{1}[a-zA-Z0-9]{0,62})\.?$` // same as hostnameRegexStringRFC1123 but must contain a non numerical TLD (possibly ending with '.')
btcAddressRegexString = `^[13][a-km-zA-HJ-NP-Z1-9]{25,34}$` // bitcoin address
btcAddressUpperRegexStringBech32 = `^BC1[02-9AC-HJ-NP-Z]{7,76}$` // bitcoin bech32 address https://en.bitcoin.it/wiki/Bech32
btcAddressLowerRegexStringBech32 = `^bc1[02-9ac-hj-np-z]{7,76}$` // bitcoin bech32 address https://en.bitcoin.it/wiki/Bech32
hostnameRegexStringRFC952 = `^[a-zA-Z]([a-zA-Z0-9\-]+[\.]?)*[a-zA-Z0-9]$` // https://tools.ietf.org/html/rfc952
hostnameRegexStringRFC1123 = `^([a-zA-Z0-9]{1}[a-zA-Z0-9-]{0,62}){1}(\.[a-zA-Z0-9]{1}[a-zA-Z0-9-]{0,62})*?$` // accepts hostname starting with a digit https://tools.ietf.org/html/rfc1123
fqdnRegexStringRFC1123 = `^([a-zA-Z0-9]{1}[a-zA-Z0-9-]{0,62})(\.[a-zA-Z0-9]{1}[a-zA-Z0-9-]{0,62})*?(\.[a-zA-Z]{1}[a-zA-Z0-9]{0,62})\.?$` // same as hostnameRegexStringRFC1123 but must contain a non numerical TLD (possibly ending with '.')
btcAddressRegexString = `^[13][a-km-zA-HJ-NP-Z1-9]{25,34}$` // bitcoin address
btcAddressUpperRegexStringBech32 = `^BC1[02-9AC-HJ-NP-Z]{7,76}$` // bitcoin bech32 address https://en.bitcoin.it/wiki/Bech32
btcAddressLowerRegexStringBech32 = `^bc1[02-9ac-hj-np-z]{7,76}$` // bitcoin bech32 address https://en.bitcoin.it/wiki/Bech32
ethAddressRegexString = `^0x[0-9a-fA-F]{40}$`
ethAddressUpperRegexString = `^0x[0-9A-F]{40}$`
ethAddressLowerRegexString = `^0x[0-9a-f]{40}$`

2
validator_test.go
View file

@ -9151,6 +9151,7 @@ func TestHostnameRFC1123Validation(t *testing.T) {
{"test.example24.com.", false},
{"test24.example24.com.", false},
{"example.", false},
{"test_example", false},
{"192.168.0.1", true},
{"email@example.com", false},
{"2001:cdba:0000:0000:0000:0000:3257:9652", false},
@ -9199,6 +9200,7 @@ func TestHostnameRFC1123AliasValidation(t *testing.T) {
{"test.example24.com.", false},
{"test24.example24.com.", false},
{"example.", false},
{"test_example", false},
{"192.168.0.1", true},
{"email@example.com", false},
{"2001:cdba:0000:0000:0000:0000:3257:9652", false},