SHA

SHA functions

Usage is very straightforward:

julia> using SHA

julia> bytes2hex(sha256("test"))
"9f86d081884c7d659a2feaa0c55ad015a3bf4f1b2b0b822cd15d6c15b0f00a08"

Each exported function (at the time of this writing, SHA-1, SHA-2 224, 256, 384 and 512, and SHA-3 224, 256, 384 and 512 functions are implemented) takes in either an AbstractVector{UInt8}, an AbstractString or an IO object. This makes it trivial to checksum a file:

shell> cat /tmp/test.txt
test
julia> using SHA

julia> open("/tmp/test.txt") do f
           sha2_256(f)
       end
32-element Array{UInt8,1}:
 0x9f
 0x86
 0xd0
 0x81
 0x88
 0x4c
 0x7d
 0x65
    ⋮
 0x5d
 0x6c
 0x15
 0xb0
 0xf0
 0x0a
 0x08

All SHA functions

Due to the colloquial usage of sha256 to refer to sha2_256, convenience functions are provided, mapping shaxxx() function calls to sha2_xxx(). For SHA-3, no such colloquialisms exist and the user must use the full sha3_xxx() names.

shaxxx() takes AbstractString and array-like objects (NTuple and Array) with elements of type UInt8.

SHA-1

# SHA.sha1 — Function.

sha1(data)

Hash data using the sha1 algorithm and return the resulting digest. See also SHA1_CTX.

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sha1(io::IO)

Hash data from io using sha1 algorithm.

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SHA-2

# SHA.sha224 — Function.

sha224(data)

Hash data using the sha224 algorithm and return the resulting digest. See also SHA2_224_CTX.

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sha224(io::IO)

Hash data from io using sha224 algorithm.

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# SHA.sha256 — Function.

sha256(data)

Hash data using the sha256 algorithm and return the resulting digest. See also SHA2_256_CTX.

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sha256(io::IO)

Hash data from io using sha256 algorithm.

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# SHA.sha384 — Function.

sha384(data)

Hash data using the sha384 algorithm and return the resulting digest. See also SHA2_384_CTX.

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sha384(io::IO)

Hash data from io using sha384 algorithm.

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# SHA.sha512 — Function.

sha512(data)

Hash data using the sha512 algorithm and return the resulting digest. See also SHA2_512_CTX.

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sha512(io::IO)

Hash data from io using sha512 algorithm.

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# SHA.sha2_224 — Function.

sha2_224(data)

Hash data using the sha2_224 algorithm and return the resulting digest. See also SHA2_224_CTX.

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sha2_224(io::IO)

Hash data from io using sha2_224 algorithm.

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# SHA.sha2_256 — Function.

sha2_256(data)

Hash data using the sha2_256 algorithm and return the resulting digest. See also SHA2_256_CTX.

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sha2_256(io::IO)

Hash data from io using sha2_256 algorithm.

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# SHA.sha2_384 — Function.

sha2_384(data)

Hash data using the sha2_384 algorithm and return the resulting digest. See also SHA2_384_CTX.

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sha2_384(io::IO)

Hash data from io using sha2_384 algorithm.

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# SHA.sha2_512 — Function.

sha2_512(data)

Hash data using the sha2_512 algorithm and return the resulting digest. See also SHA2_512_CTX.

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sha2_512(io::IO)

Hash data from io using sha2_512 algorithm.

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SHA-3

# SHA.sha3_224 — Function.

sha3_224(data)

Hash data using the sha3_224 algorithm and return the resulting digest. See also SHA3_224_CTX.

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sha3_224(io::IO)

Hash data from io using sha3_224 algorithm.

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# SHA.sha3_256 — Function.

sha3_256(data)

Hash data using the sha3_256 algorithm and return the resulting digest. See also SHA3_256_CTX.

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sha3_256(io::IO)

Hash data from io using sha3_256 algorithm.

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# SHA.sha3_384 — Function.

sha3_384(data)

Hash data using the sha3_384 algorithm and return the resulting digest. See also SHA3_384_CTX.

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sha3_384(io::IO)

Hash data from io using sha3_384 algorithm.

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# SHA.sha3_512 — Function.

sha3_512(data)

Hash data using the sha3_512 algorithm and return the resulting digest. See also SHA3_512_CTX.

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sha3_512(io::IO)

Hash data from io using sha3_512 algorithm.

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Working with context

To create a hash from multiple items the SHAX_XXX_CTX() types can be used to create a stateful hash object that is updated with update! and finalized with digest!

julia> using SHA

julia> ctx = SHA2_256_CTX()
SHA2 256-bit hash state

julia> update!(ctx, b"some data")
0x0000000000000009

julia> update!(ctx, b"some more data")
0x0000000000000017

julia> digest!(ctx)
32-element Vector{UInt8}:
 0xbe
 0xcf
 0x23
 0xda
 0xaf
 0x02
 0xf7
 0xa3
 0x57
 0x92
    ⋮
 0x89
 0x4f
 0x59
 0xd8
 0xb3
 0xb4
 0x81
 0x8b
 0xc5

Note that, at the time of this writing, the SHA3 code is not optimized, and as such is roughly an order of magnitude slower than SHA2.

# SHA.update! — Function.

update!(context, data[, datalen])

Update the SHA context with the bytes in data. See also digest! for finalizing the hash.

Examples

julia> ctx = SHA1_CTX()
SHA1 hash state

julia> update!(ctx, b"data to to be hashed")

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# SHA.digest! — Function.

digest!(context)

Finalize the SHA context and return the hash as array of bytes (Array{Uint8, 1}). Updating the context after calling digest! on it will error.

Examples

julia> ctx = SHA1_CTX()
SHA1 hash state

julia> update!(ctx, b"data to to be hashed")

julia> digest!(ctx)
20-element Array{UInt8,1}:
 0x83
 0xe4
 ⋮
 0x89
 0xf5

julia> update!(ctx, b"more data")
ERROR: Cannot update CTX after `digest!` has been called on it
[...]

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All SHA context types

SHA-1

# SHA.SHA1_CTX — Type.

SHA1_CTX()

Construct an empty SHA1 context.

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SHA-2

Convenience types are also provided, where SHAXXX_CTX is a type alias for SHA2_XXX_CTX.

# SHA.SHA224_CTX — Type.

SHA2_224_CTX()

Construct an empty SHA2_224 context.

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# SHA.SHA256_CTX — Type.

SHA2_256_CTX()

Construct an empty SHA2_256 context.

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# SHA.SHA384_CTX — Type.

SHA2_384()

Construct an empty SHA2_384 context.

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# SHA.SHA512_CTX — Type.

SHA2_512_CTX()

Construct an empty SHA2_512 context.

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# SHA.SHA2_224_CTX — Type.

SHA2_224_CTX()

Construct an empty SHA2_224 context.

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# SHA.SHA2_256_CTX — Type.

SHA2_256_CTX()

Construct an empty SHA2_256 context.

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# SHA.SHA2_384_CTX — Type.

SHA2_384()

Construct an empty SHA2_384 context.

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# SHA.SHA2_512_CTX — Type.

SHA2_512_CTX()

Construct an empty SHA2_512 context.

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SHA-3

# SHA.SHA3_224_CTX — Type.

SHA3_224_CTX()

Construct an empty SHA3_224 context.

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# SHA.SHA3_256_CTX — Type.

SHA3_256_CTX()

Construct an empty SHA3_256 context.

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# SHA.SHA3_384_CTX — Type.

SHA3_384_CTX()

Construct an empty SHA3_384 context.

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# SHA.SHA3_512_CTX — Type.

SHA3_512_CTX()

Construct an empty SHA3_512 context.

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HMAC functions

julia> using SHA

julia> key = collect(codeunits("key_string"))
10-element Vector{UInt8}:
 0x6b
 0x65
 0x79
 0x5f
 0x73
 0x74
 0x72
 0x69
 0x6e
 0x67

julia> bytes2hex(hmac_sha3_256(key, "test-message"))
"bc49a6f2aa29b27ee5ed1e944edd7f3d153e8a01535d98b5e24dac9a589a6248"

To create a hash from multiple items, the HMAC_CTX() types can be used to create a stateful hash object that is updated with update! and finalized with digest!.

julia> using SHA

julia> key = collect(codeunits("key_string"))
10-element Vector{UInt8}:
 0x6b
 0x65
 0x79
 0x5f
 0x73
 0x74
 0x72
 0x69
 0x6e
 0x67

julia> ctx = HMAC_CTX(SHA3_256_CTX(), key);

julia> update!(ctx, b"test-")
0x0000000000000000000000000000008d

julia> update!(ctx, b"message")
0x00000000000000000000000000000094

julia> bytes2hex(digest!(ctx))
"bc49a6f2aa29b27ee5ed1e944edd7f3d153e8a01535d98b5e24dac9a589a6248"

All HMAC functions

HMAC context type

# SHA.HMAC_CTX — Type.

HMAC_CTX(ctx::CTX, key::Vector{UInt8}) where {CTX<:SHA_CTX}

Construct an empty HMAC_CTX context.

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SHA-1

# SHA.hmac_sha1 — Function.

hmac_sha1(key, data)

Hash data using the sha1 algorithm using the passed key. See also HMAC_CTX.

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hmac_sha1(key, io::IO)

Hash data from io with the passed key using sha1 algorithm.

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SHA-2

# SHA.hmac_sha224 — Function.

hmac_sha224(key, data)

Hash data using the sha224 algorithm using the passed key. See also HMAC_CTX.

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hmac_sha224(key, io::IO)

Hash data from io with the passed key using sha224 algorithm.

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# SHA.hmac_sha256 — Function.

hmac_sha256(key, data)

Hash data using the sha256 algorithm using the passed key. See also HMAC_CTX.

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hmac_sha256(key, io::IO)

Hash data from io with the passed key using sha256 algorithm.

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# SHA.hmac_sha384 — Function.

hmac_sha384(key, data)

Hash data using the sha384 algorithm using the passed key. See also HMAC_CTX.

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hmac_sha384(key, io::IO)

Hash data from io with the passed key using sha384 algorithm.

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# SHA.hmac_sha512 — Function.

hmac_sha512(key, data)

Hash data using the sha512 algorithm using the passed key. See also HMAC_CTX.

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hmac_sha512(key, io::IO)

Hash data from io with the passed key using sha512 algorithm.

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# SHA.hmac_sha2_224 — Function.

hmac_sha2_224(key, data)

Hash data using the sha2_224 algorithm using the passed key. See also HMAC_CTX.

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hmac_sha2_224(key, io::IO)

Hash data from io with the passed key using sha2_224 algorithm.

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# SHA.hmac_sha2_256 — Function.

hmac_sha2_256(key, data)

Hash data using the sha2_256 algorithm using the passed key. See also HMAC_CTX.

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hmac_sha2_256(key, io::IO)

Hash data from io with the passed key using sha2_256 algorithm.

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# SHA.hmac_sha2_384 — Function.

hmac_sha2_384(key, data)

Hash data using the sha2_384 algorithm using the passed key. See also HMAC_CTX.

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hmac_sha2_384(key, io::IO)

Hash data from io with the passed key using sha2_384 algorithm.

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# SHA.hmac_sha2_512 — Function.

hmac_sha2_512(key, data)

Hash data using the sha2_512 algorithm using the passed key. See also HMAC_CTX.

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hmac_sha2_512(key, io::IO)

Hash data from io with the passed key using sha2_512 algorithm.

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SHA-3

# SHA.hmac_sha3_224 — Function.

hmac_sha3_224(key, data)

Hash data using the sha3_224 algorithm using the passed key. See also HMAC_CTX.

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hmac_sha3_224(key, io::IO)

Hash data from io with the passed key using sha3_224 algorithm.

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# SHA.hmac_sha3_256 — Function.

hmac_sha3_256(key, data)

Hash data using the sha3_256 algorithm using the passed key. See also HMAC_CTX.

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hmac_sha3_256(key, io::IO)

Hash data from io with the passed key using sha3_256 algorithm.

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# SHA.hmac_sha3_384 — Function.

hmac_sha3_384(key, data)

Hash data using the sha3_384 algorithm using the passed key. See also HMAC_CTX.

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hmac_sha3_384(key, io::IO)

Hash data from io with the passed key using sha3_384 algorithm.

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# SHA.hmac_sha3_512 — Function.

hmac_sha3_512(key, data)

Hash data using the sha3_512 algorithm using the passed key. See also HMAC_CTX.

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hmac_sha3_512(key, io::IO)

Hash data from io with the passed key using sha3_512 algorithm.

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