diff options
Diffstat (limited to 'backend/node_modules/ecdsa-sig-formatter/src')
3 files changed, 0 insertions, 227 deletions
diff --git a/backend/node_modules/ecdsa-sig-formatter/src/ecdsa-sig-formatter.d.ts b/backend/node_modules/ecdsa-sig-formatter/src/ecdsa-sig-formatter.d.ts deleted file mode 100644 index 9693aa0..0000000 --- a/backend/node_modules/ecdsa-sig-formatter/src/ecdsa-sig-formatter.d.ts +++ /dev/null @@ -1,17 +0,0 @@ -/// <reference types="node" /> - -declare module "ecdsa-sig-formatter" { - /** - * Convert the ASN.1/DER encoded signature to a JOSE-style concatenated signature. Returns a base64 url encoded String. - * If signature is a String, it should be base64 encoded - * alg must be one of ES256, ES384 or ES512 - */ - export function derToJose(signature: Buffer | string, alg: string): string; - - /** - * Convert the JOSE-style concatenated signature to an ASN.1/DER encoded signature. Returns a Buffer - * If signature is a String, it should be base64 url encoded - * alg must be one of ES256, ES384 or ES512 - */ - export function joseToDer(signature: Buffer | string, alg: string): Buffer -} diff --git a/backend/node_modules/ecdsa-sig-formatter/src/ecdsa-sig-formatter.js b/backend/node_modules/ecdsa-sig-formatter/src/ecdsa-sig-formatter.js deleted file mode 100644 index 38eeb9b..0000000 --- a/backend/node_modules/ecdsa-sig-formatter/src/ecdsa-sig-formatter.js +++ /dev/null @@ -1,187 +0,0 @@ -'use strict'; - -var Buffer = require('safe-buffer').Buffer; - -var getParamBytesForAlg = require('./param-bytes-for-alg'); - -var MAX_OCTET = 0x80, - CLASS_UNIVERSAL = 0, - PRIMITIVE_BIT = 0x20, - TAG_SEQ = 0x10, - TAG_INT = 0x02, - ENCODED_TAG_SEQ = (TAG_SEQ | PRIMITIVE_BIT) | (CLASS_UNIVERSAL << 6), - ENCODED_TAG_INT = TAG_INT | (CLASS_UNIVERSAL << 6); - -function base64Url(base64) { - return base64 - .replace(/=/g, '') - .replace(/\+/g, '-') - .replace(/\//g, '_'); -} - -function signatureAsBuffer(signature) { - if (Buffer.isBuffer(signature)) { - return signature; - } else if ('string' === typeof signature) { - return Buffer.from(signature, 'base64'); - } - - throw new TypeError('ECDSA signature must be a Base64 string or a Buffer'); -} - -function derToJose(signature, alg) { - signature = signatureAsBuffer(signature); - var paramBytes = getParamBytesForAlg(alg); - - // the DER encoded param should at most be the param size, plus a padding - // zero, since due to being a signed integer - var maxEncodedParamLength = paramBytes + 1; - - var inputLength = signature.length; - - var offset = 0; - if (signature[offset++] !== ENCODED_TAG_SEQ) { - throw new Error('Could not find expected "seq"'); - } - - var seqLength = signature[offset++]; - if (seqLength === (MAX_OCTET | 1)) { - seqLength = signature[offset++]; - } - - if (inputLength - offset < seqLength) { - throw new Error('"seq" specified length of "' + seqLength + '", only "' + (inputLength - offset) + '" remaining'); - } - - if (signature[offset++] !== ENCODED_TAG_INT) { - throw new Error('Could not find expected "int" for "r"'); - } - - var rLength = signature[offset++]; - - if (inputLength - offset - 2 < rLength) { - throw new Error('"r" specified length of "' + rLength + '", only "' + (inputLength - offset - 2) + '" available'); - } - - if (maxEncodedParamLength < rLength) { - throw new Error('"r" specified length of "' + rLength + '", max of "' + maxEncodedParamLength + '" is acceptable'); - } - - var rOffset = offset; - offset += rLength; - - if (signature[offset++] !== ENCODED_TAG_INT) { - throw new Error('Could not find expected "int" for "s"'); - } - - var sLength = signature[offset++]; - - if (inputLength - offset !== sLength) { - throw new Error('"s" specified length of "' + sLength + '", expected "' + (inputLength - offset) + '"'); - } - - if (maxEncodedParamLength < sLength) { - throw new Error('"s" specified length of "' + sLength + '", max of "' + maxEncodedParamLength + '" is acceptable'); - } - - var sOffset = offset; - offset += sLength; - - if (offset !== inputLength) { - throw new Error('Expected to consume entire buffer, but "' + (inputLength - offset) + '" bytes remain'); - } - - var rPadding = paramBytes - rLength, - sPadding = paramBytes - sLength; - - var dst = Buffer.allocUnsafe(rPadding + rLength + sPadding + sLength); - - for (offset = 0; offset < rPadding; ++offset) { - dst[offset] = 0; - } - signature.copy(dst, offset, rOffset + Math.max(-rPadding, 0), rOffset + rLength); - - offset = paramBytes; - - for (var o = offset; offset < o + sPadding; ++offset) { - dst[offset] = 0; - } - signature.copy(dst, offset, sOffset + Math.max(-sPadding, 0), sOffset + sLength); - - dst = dst.toString('base64'); - dst = base64Url(dst); - - return dst; -} - -function countPadding(buf, start, stop) { - var padding = 0; - while (start + padding < stop && buf[start + padding] === 0) { - ++padding; - } - - var needsSign = buf[start + padding] >= MAX_OCTET; - if (needsSign) { - --padding; - } - - return padding; -} - -function joseToDer(signature, alg) { - signature = signatureAsBuffer(signature); - var paramBytes = getParamBytesForAlg(alg); - - var signatureBytes = signature.length; - if (signatureBytes !== paramBytes * 2) { - throw new TypeError('"' + alg + '" signatures must be "' + paramBytes * 2 + '" bytes, saw "' + signatureBytes + '"'); - } - - var rPadding = countPadding(signature, 0, paramBytes); - var sPadding = countPadding(signature, paramBytes, signature.length); - var rLength = paramBytes - rPadding; - var sLength = paramBytes - sPadding; - - var rsBytes = 1 + 1 + rLength + 1 + 1 + sLength; - - var shortLength = rsBytes < MAX_OCTET; - - var dst = Buffer.allocUnsafe((shortLength ? 2 : 3) + rsBytes); - - var offset = 0; - dst[offset++] = ENCODED_TAG_SEQ; - if (shortLength) { - // Bit 8 has value "0" - // bits 7-1 give the length. - dst[offset++] = rsBytes; - } else { - // Bit 8 of first octet has value "1" - // bits 7-1 give the number of additional length octets. - dst[offset++] = MAX_OCTET | 1; - // length, base 256 - dst[offset++] = rsBytes & 0xff; - } - dst[offset++] = ENCODED_TAG_INT; - dst[offset++] = rLength; - if (rPadding < 0) { - dst[offset++] = 0; - offset += signature.copy(dst, offset, 0, paramBytes); - } else { - offset += signature.copy(dst, offset, rPadding, paramBytes); - } - dst[offset++] = ENCODED_TAG_INT; - dst[offset++] = sLength; - if (sPadding < 0) { - dst[offset++] = 0; - signature.copy(dst, offset, paramBytes); - } else { - signature.copy(dst, offset, paramBytes + sPadding); - } - - return dst; -} - -module.exports = { - derToJose: derToJose, - joseToDer: joseToDer -}; diff --git a/backend/node_modules/ecdsa-sig-formatter/src/param-bytes-for-alg.js b/backend/node_modules/ecdsa-sig-formatter/src/param-bytes-for-alg.js deleted file mode 100644 index 9fe67ac..0000000 --- a/backend/node_modules/ecdsa-sig-formatter/src/param-bytes-for-alg.js +++ /dev/null @@ -1,23 +0,0 @@ -'use strict'; - -function getParamSize(keySize) { - var result = ((keySize / 8) | 0) + (keySize % 8 === 0 ? 0 : 1); - return result; -} - -var paramBytesForAlg = { - ES256: getParamSize(256), - ES384: getParamSize(384), - ES512: getParamSize(521) -}; - -function getParamBytesForAlg(alg) { - var paramBytes = paramBytesForAlg[alg]; - if (paramBytes) { - return paramBytes; - } - - throw new Error('Unknown algorithm "' + alg + '"'); -} - -module.exports = getParamBytesForAlg; |