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Merged
merged 4 commits into from
Jan 6, 2022
Merged

Ed25519 Support #1

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2f7fa12
added oauth pop
jricher Jun 30, 2021
731b77f
update examples
jricher Oct 21, 2021
fd96b6e
update HTTP signature method, closes #326
jricher Oct 21, 2021
df03517
added ed25519 example
jricher Jan 6, 2022
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322 changes: 199 additions & 123 deletions gnap_crypto_examples.py
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Original file line number Diff line number Diff line change
Expand Up @@ -146,6 +146,205 @@ def softwrap(src, space = 2, width = 68, breakon = '; '):
return ('\n').join(out)


## HTTPSig Example

body = """
{
"access_token": {
"access": [
"dolphin-metadata"
]
},
"interact": {
"start": ["redirect"],
"finish": {
"method": "redirect",
"uri": "https://client.foo/callback",
"nonce": "VJLO6A4CAYLBXHTR0KRO"
}
},
"client": {
"proof": "httpsig",
"key": {
"jwk": {
"kid": "gnap-rsa",
"kty": "RSA",
"e": "AQAB",
"alg": "RS256",
"n": "hYOJ-XOKISdMMShn_G4W9m20mT0VWtQBsmBBkI2cmRt4Ai8BfYdHsFzAtYKOjpBR1RpKpJmVKxIGNy0g6Z3ad2XYsh8KowlyVy8IkZ8NMwSrcUIBZGYXjHpwjzvfGvXH_5KJlnR3_uRUp4Z4Ujk2bCaKegDn11V2vxE41hqaPUnhRZxe0jRETddzsE3mu1SK8dTCROjwUl14mUNo8iTrTm4n0qDadz8BkPo-uv4BC0bunS0K3bA_3UgVp7zBlQFoFnLTO2uWp_muLEWGl67gBq9MO3brKXfGhi3kOzywzwPTuq-cVQDyEN7aL0SxCb3Hc4IdqDaMg8qHUyObpPitDQ"
}
}
"display": {
"name": "My Client Display Name",
"uri": "https://client.foo/"
},
}
}
"""
print(hardwrap(body))
print()
print('Content-Length: ' + str(len(body)))
print()

hashed = hashlib.new('sha256', str.encode(body)).digest()
digest = 'id-sha-256=' + base64.b64encode(hashed).decode('utf-8')
print('Hashed:')
print(base64.b64encode(hashed).decode('utf-8'))
print()
print(hardwrap('Content-Digest: ' + digest))
print()

coveredContent = {
str(http_sfv.Item("@method")): "POST",
str(http_sfv.Item("@target-uri")): "https://server.example.com/gnap",
str(http_sfv.Item("content-type")): "application/json",
str(http_sfv.Item("content-digest")): digest,
str(http_sfv.Item("content-length")): str(len(body))
}

sigparams = http_sfv.InnerList()
base = '';
for c in coveredContent:
i = http_sfv.Item()
i.parse(c.encode())
sigparams.append(i)
base += c # already serialized as an Item
base += ': '
base += coveredContent[c]
base += "\n"

sigparams.params['created'] = 1618884475
sigparams.params['keyid'] = rsajwk['kid']

sigparamstr = ''
sigparamstr += str(http_sfv.Item("@signature-params"))
sigparamstr += ": "
sigparamstr += str(sigparams)

base += sigparamstr

print("Base string:")
print(softwrap(base))
print()
print(softwrap('Signature-Input: sig1=' + str(sigparams)))
print()

key = RSA.import_key(PKCS8.unwrap(PEM.decode(rsapk)[0])[1])

h = SHA512.new(base.encode('utf-8'))
signer = pss.new(key, mask_func=mgf512, salt_bytes=64)

signed = http_sfv.Item(signer.sign(h))

print("Signed:")
print(signed)
print()
print(hardwrap(str(signed).strip(':'), 0))
print()
print(hardwrap('Signature: sig1=' + str(signed)))
print()

print("POST /gnap HTTP/1.1")
print("Host: server.example.com")
print("Content-Type: application/json")
print('Content-Length: ' + str(len(body)))
print(hardwrap('Content-Digest: ' + digest))
print(softwrap('Signature-Input: sig1=' + str(sigparams)))
print(hardwrap('Signature: sig1=' + str(signed)))
print()
print(hardwrap(body))
print()

pubKey = RSA.import_key(rsacert)
verifier = pss.new(key, mask_func=mgf512, salt_bytes=64)

try:
verified = verifier.verify(h, signed.value)
print("Verified:")
print('> YES!')
print()
except (ValueError, TypeError):
print("Verified:")
print('> NO!')
print()

print('*' * 30)


## HTTPSig with Access Token Example

accessToken = '80UPRY5NM33OMUKMKSKU'

coveredContent = {
str(http_sfv.Item("@method")): "GET",
str(http_sfv.Item("@target-uri")): "https://resource.example.com/stuff",
str(http_sfv.Item("authorization")): 'GNAP ' + accessToken,
}

sigparams = http_sfv.InnerList()
base = '';
for c in coveredContent:
i = http_sfv.Item()
i.parse(c.encode())
sigparams.append(i)
base += c # already serialized as an Item
base += ': '
base += coveredContent[c]
base += "\n"

sigparams.params['created'] = 1618884475
sigparams.params['keyid'] = rsajwk['kid']

sigparamstr = ''
sigparamstr += str(http_sfv.Item("@signature-params"))
sigparamstr += ": "
sigparamstr += str(sigparams)

base += sigparamstr

print("Base string:")
print(softwrap(base))
print()
print(softwrap('Signature-Input: sig1=' + str(sigparams)))
print()

key = RSA.import_key(PKCS8.unwrap(PEM.decode(rsapk)[0])[1])

h = SHA512.new(base.encode('utf-8'))
signer = pss.new(key, mask_func=mgf512, salt_bytes=64)

signed = http_sfv.Item(signer.sign(h))

print("Signed:")
print(signed)
print()
print(hardwrap(str(signed).strip(':'), 0))
print()
print(hardwrap('Signature: sig1=' + str(signed)))
print()

print("GET /stuff HTTP/1.1")
print("Host: resource.example.com")
print("Authorization: GNAP " + accessToken)
print(softwrap('Signature-Input: sig1=' + str(sigparams)))
print(hardwrap('Signature: sig1=' + str(signed)))
print()

pubKey = RSA.import_key(rsacert)
verifier = pss.new(key, mask_func=mgf512, salt_bytes=64)

try:
verified = verifier.verify(h, signed.value)
print("Verified:")
print('> YES!')
print()
except (ValueError, TypeError):
print("Verified:")
print('> NO!')
print()

print('*' * 30)



## Detached JWS Example
Expand Down Expand Up @@ -463,129 +662,6 @@ def softwrap(src, space = 2, width = 68, breakon = '; '):
print()


print('*' * 30)

## HTTPSig Example

body = """
{
"access_token": {
"access": [
"dolphin-metadata"
]
},
"interact": {
"start": ["redirect"],
"finish": {
"method": "redirect",
"uri": "https://client.foo/callback",
"nonce": "VJLO6A4CAYLBXHTR0KRO"
}
},
"client": {
"proof": "httpsig",
"key": {
"jwk": {
"kid": "gnap-rsa",
"kty": "RSA",
"e": "AQAB",
"alg": "RS256",
"n": "hYOJ-XOKISdMMShn_G4W9m20mT0VWtQBsmBBkI2cmRt4Ai8BfYdHsFzAtYKOjpBR1RpKpJmVKxIGNy0g6Z3ad2XYsh8KowlyVy8IkZ8NMwSrcUIBZGYXjHpwjzvfGvXH_5KJlnR3_uRUp4Z4Ujk2bCaKegDn11V2vxE41hqaPUnhRZxe0jRETddzsE3mu1SK8dTCROjwUl14mUNo8iTrTm4n0qDadz8BkPo-uv4BC0bunS0K3bA_3UgVp7zBlQFoFnLTO2uWp_muLEWGl67gBq9MO3brKXfGhi3kOzywzwPTuq-cVQDyEN7aL0SxCb3Hc4IdqDaMg8qHUyObpPitDQ"
}
}
"display": {
"name": "My Client Display Name",
"uri": "https://client.foo/"
},
}
}
"""
print(hardwrap(body))
print()
print('Content-Length: ' + str(len(body)))
print()

hashed = hashlib.new('sha256', str.encode(body)).digest()
print('Hashed:')
print(base64.b64encode(hashed).decode('utf-8'))
print()
print(hardwrap('Digest: SHA-256=' + base64.b64encode(hashed).decode('utf-8')))
print()

coveredContent = {
str(http_sfv.Item("@request-target")): "post /gnap",
str(http_sfv.Item("host")): "server.example.com",
str(http_sfv.Item("content-type")): "application/json",
str(http_sfv.Item("digest")): "SHA-256=" + base64.b64encode(hashed).decode('utf-8'),
str(http_sfv.Item("content-length")): str(len(body))
}

sigparams = http_sfv.InnerList()
base = '';
for c in coveredContent:
i = http_sfv.Item()
i.parse(c.encode())
sigparams.append(i)
base += c # already serialized as an Item
base += ': '
base += coveredContent[c]
base += "\n"

sigparams.params['created'] = 1618884475
sigparams.params['keyid'] = rsajwk['kid']

sigparamstr = ''
sigparamstr += str(http_sfv.Item("@signature-params"))
sigparamstr += ": "
sigparamstr += str(sigparams)

base += sigparamstr

print("Base string:")
print(softwrap(base))
print()
print(softwrap('Signature-Input: sig1=' + str(sigparams)))
print()

key = RSA.import_key(PKCS8.unwrap(PEM.decode(rsapk)[0])[1])

h = SHA512.new(base.encode('utf-8'))
signer = pss.new(key, mask_func=mgf512, salt_bytes=64)

signed = http_sfv.Item(signer.sign(h))

print("Signed:")
print(signed)
print()
print(hardwrap(str(signed).strip(':'), 0))
print()
print(softwrap('Signature: sig1=' + str(signed)))
print()

print("POST /gnap HTTP/1.1")
print("Host: server.example.com")
print("Content-Type: application/json")
print('Content-Length: ' + str(len(body)))
print(hardwrap('Digest: SHA-256=' + base64.b64encode(hashed).decode('utf-8')))
print(softwrap('Signature-Input: sig1=' + str(sigparams)))
print(softwrap('Signature: sig1=' + str(signed)))
print()
print(hardwrap(body))
print()

pubKey = RSA.import_key(rsacert)
verifier = pss.new(key, mask_func=mgf512, salt_bytes=64)

try:
verified = verifier.verify(h, signed.value)
print("Verified:")
print('> YES!')
print()
except (ValueError, TypeError):
print("Verified:")
print('> NO!')
print()

print('*' * 30)

## OAuth PoP Example
Expand Down
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