regex101: DER/BER Bitcoin signature

Pro

^start of string

30the literal text 30

Group 1([0-4][0-9a-f])

Character Class[0-4]

0-4one character from 0 (48₁₀) to 4 (52₁₀)

Character Class[0-9a-f]

0-9one character from 0 (48₁₀) to 9 (57₁₀)

a-fone character from a (97₁₀) to f (102₁₀) (case insensitive)

Group 2(02([0-2][0-9a-f])(00)?[a-f0-9]{2,64})

02the literal text 02

Group 3([0-2][0-9a-f])

Character Class[0-2]

0-2one character from 0 (48₁₀) to 2 (50₁₀)

Character Class[0-9a-f]

0-9one character from 0 (48₁₀) to 9 (57₁₀)

a-fone character from a (97₁₀) to f (102₁₀) (case insensitive)

Group 4(00)?

?repeats the group contents below at most once:

00the literal text 00

Character Class[a-f0-9]{2,64}

{2,64}matches between 2 and 64 characters from the set below:

a-fone character from a (97₁₀) to f (102₁₀) (case insensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Group 5(02([0-2][0-9a-f])(00)?[a-f0-9]{2,64})

02the literal text 02

Group 6([0-2][0-9a-f])

Character Class[0-2]

0-2one character from 0 (48₁₀) to 2 (50₁₀)

Character Class[0-9a-f]

0-9one character from 0 (48₁₀) to 9 (57₁₀)

a-fone character from a (97₁₀) to f (102₁₀) (case insensitive)

Group 7(00)?

?repeats the group contents below at most once:

00the literal text 00

Character Class[a-f0-9]{2,64}

{2,64}matches between 2 and 64 characters from the set below:

a-fone character from a (97₁₀) to f (102₁₀) (case insensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Group 8(01|02|03|81|82|83)?

?repeats the group contents below at most once:

1st Alternative01

01the literal text 01

2nd Alternative02

02the literal text 02

3rd Alternative03

03the literal text 03

4th Alternative81

81the literal text 81

5th Alternative82

82the literal text 82

6th Alternative83

83the literal text 83

$end of string, or before its final line terminator

Global pattern flags

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

25 tokens

Regular Expression

^30([0-4][0-9a-f])(02([0-2][0-9a-f])(00)?[a-f0-9]{2,64})(02([0-2][0-9a-f])(00)?[a-f0-9]{2,64})(01|02|03|81|82|83)?$

304402200e2244c8966e5b1a150f49d0f6bac978a9cfa1c4b32b4cf783c9f7c93be4bc6b022077018e8d6da02ec60f93b3e936fd283aa87beab1c373839616d1ad5a9bc4dcfb

Substitution

304402200e2244c8966e5b1a150f49d0f6bac978a9cfa1c4b32b4cf783c9f7c93be4bc6b022077018e8d6da02ec60f93b3e936fd283aa87beab1c373839616d1ad5a9bc4dcfb