regex101: PEM PATTERN

1st Alternative(-----BEGIN PUBLIC KEY-----(\n|\r|\r\n)([0-9a-zA-Z\+\/=]{64}(\n|\r|\r\n))*([0-9a-zA-Z\+\/=]{1,63}(\n|\r|\r\n))?-----END PUBLIC KEY-----)

Group 1(-----BEGIN PUBLIC KEY-----(\n|\r|\r\n)([0-9a-zA-Z\+\/=]{64}(\n|\r|\r\n))*([0-9a-zA-Z\+\/=]{1,63}(\n|\r|\r\n))?-----END PUBLIC KEY-----)

-----BEGIN PUBLIC KEY-----the literal text -----BEGIN PUBLIC KEY----- (case sensitive)

Group 2(\n|\r|\r\n)

1st Alternative\n

\na line-feed (newline) character (ASCII 10)

2nd Alternative\r

\ra carriage return (ASCII 13)

3rd Alternative\r\n

\ra carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

Group 3([0-9a-zA-Z\+\/=]{64}(\n|\r|\r\n))*

*repeats the group contents below any number of times:

Character Class[0-9a-zA-Z\+\/=]{64}

{64}matches exactly 64 characters from the set below:

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

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

\+the literal + (43₁₀ / 53₈ / 2B₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

=the literal = (61₁₀ / 75₈ / 3D₁₆)

Group 4(\n|\r|\r\n)

1st Alternative\n

\na line-feed (newline) character (ASCII 10)

2nd Alternative\r

\ra carriage return (ASCII 13)

3rd Alternative\r\n

\ra carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

Group 5([0-9a-zA-Z\+\/=]{1,63}(\n|\r|\r\n))?

?repeats the group contents below at most once:

Character Class[0-9a-zA-Z\+\/=]{1,63}

{1,63}matches between 1 and 63 characters from the set below:

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

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

\+the literal + (43₁₀ / 53₈ / 2B₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

=the literal = (61₁₀ / 75₈ / 3D₁₆)

Group 6(\n|\r|\r\n)

1st Alternative\n

\na line-feed (newline) character (ASCII 10)

2nd Alternative\r

\ra carriage return (ASCII 13)

3rd Alternative\r\n

\ra carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

-----END PUBLIC KEY-----the literal text -----END PUBLIC KEY----- (case sensitive)

2nd Alternative(-----BEGIN PRIVATE KEY-----(\n|\r|\r\n)([0-9a-zA-Z\+\/=]{64}(\n|\r|\r\n))*([0-9a-zA-Z\+\/=]{1,63}(\n|\r|\r\n))?-----END PRIVATE KEY-----)

Group 7(-----BEGIN PRIVATE KEY-----(\n|\r|\r\n)([0-9a-zA-Z\+\/=]{64}(\n|\r|\r\n))*([0-9a-zA-Z\+\/=]{1,63}(\n|\r|\r\n))?-----END PRIVATE KEY-----)

-----BEGIN PRIVATE KEY-----the literal text -----BEGIN PRIVATE KEY----- (case sensitive)

Group 8(\n|\r|\r\n)

1st Alternative\n

\na line-feed (newline) character (ASCII 10)

2nd Alternative\r

\ra carriage return (ASCII 13)

3rd Alternative\r\n

\ra carriage return (ASCII 13)

\na line-feed (newline) character (ASCII 10)

Group 9([0-9a-zA-Z\+\/=]{64}(\n|\r|\r\n))*

*repeats the group contents below any number of times:

Character Class[0-9a-zA-Z\+\/=]{64}

Group 10(\n|\r|\r\n)

Group 11([0-9a-zA-Z\+\/=]{1,63}(\n|\r|\r\n))?

-----END PRIVATE KEY-----the literal text -----END PRIVATE KEY----- (case sensitive)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Search reference

Regular Expression

(-----BEGIN PUBLIC KEY-----(\n|\r|\r\n)([0-9a-zA-Z\+\/=]{64}(\n|\r|\r\n))*([0-9a-zA-Z\+\/=]{1,63}(\n|\r|\r\n))?-----END PUBLIC KEY-----)|(-----BEGIN PRIVATE KEY-----(\n|\r|\r\n)([0-9a-zA-Z\+\/=]{64}(\n|\r|\r\n))*([0-9a-zA-Z\+\/=]{1,63}(\n|\r|\r\n))?-----END PRIVATE KEY-----)

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Regular Expressions 101

Regular Expression

Extraction