Janady13/missionmatch / internal/platform/security/password.go

Source identity

Field	Recorded value
Source type	GitHub source
Original record	Janady13/missionmatch / internal/platform/security/password.go
Date	Not specified in source
Repository	Janady13/missionmatch
Revision	720d47fae476b0d38477ae4401697d372b1ea2bc
Branch	feature/opportunity-to-outcome
Path or archive member	internal/platform/security/password.go
Original SHA-256	bf070560fdcfd979b0f650066324344dfc4367c9777ebfb5780050a8082fc2aa
Git blob SHA	0fc15d6ee5bccc9748811ee31fdf4827b7177574
Reading-copy SHA-256	bf070560fdcfd979b0f650066324344dfc4367c9777ebfb5780050a8082fc2aa

Original source ↗

Every recorded occurrence

These 36 records contain identical original source bytes. Their paths and revisions remain part of the archive.

Original record	Branch or archive	Revision / identifier	Original location
Janady13/missionmatch / internal/platform/security/password.go	feature/opportunity-to-outcome	720d47fae476b0d38477ae4401697d372b1ea2bc	Open original
Janady13/missionmatch / internal/platform/security/password.go	per-tenant-routing	9bde0f9a74b89d01980fa658e5253acda7528d0c	Open original
Janady13/missionmatch / internal/platform/security/password.go	collision-deconfliction	4ee5a09972608ed89f8377c6665542d5f450f0a6	Open original
Janady13/missionmatch / internal/platform/security/password.go	ws6-retrieval	6c56e29231ec05735927fa265c97d517499dfeaf	Open original
Janady13/missionmatch / internal/platform/security/password.go	workstream-a-shared-core	e0de03ac3a1ec826bd15d0e048e3b02baa23eeff	Open original
Janady13/missionmatch / internal/platform/security/password.go	m5-price-to-win	41000ad30fff4129fdaf5ec84e15ba14c27d4890	Open original
Janady13/missionmatch / internal/platform/security/password.go	workstream-c-slatematch	5cd60c918301b46ecd6ed3e03e20c395da0062e2	Open original
Janady13/missionmatch / internal/platform/security/password.go	ws1-ontology-sync	b596f449a32a1016fbd403c36505cc00a1ac9ee6	Open original
Janady13/missionmatch / internal/platform/security/password.go	master	1e9249840a4302ec82e123b9c9cb6f75badea3e4	Open original
Janady13/missionmatch / internal/platform/security/password.go	ws8-teaching-loop	c823f0fb6bb2aba0f39001eb6de96f4000d9321f	Open original
Janady13/missionmatch / internal/platform/security/password.go	w3-ai-staffing-recommendations	43d56387270ef4da4cabd794d97ca6a49909bc7d	Open original
Janady13/missionmatch / internal/platform/security/password.go	mag-substrate	b82c7100a492dec67dfd1eda6b3f53def859be35	Open original
Janady13/missionmatch / internal/platform/security/password.go	ws3-clearance	4b8e7ce594c068621867f9c9deed0ec64ae6c553	Open original
Janady13/missionmatch / internal/platform/security/password.go	workstream-d-command-center	255e7d1d420abf5e277d0cd8c9b14f6f72b6acb9	Open original
Janady13/missionmatch / internal/platform/security/password.go	phase2-eval-fairness	d361af254701975fe239927656ababb56374655e	Open original
Janady13/missionmatch / internal/platform/security/password.go	workstream-e-dataflow-deploy	433815a042f9741411e60fa553fe72143e9b10db	Open original
Janady13/missionmatch / internal/platform/security/password.go	ruthless-debug-sweep	b7d742f8f032984be3817efffa3eb8b13b651c1f	Open original
Janady13/missionmatch / internal/platform/security/password.go	time-to-fill-survival	b66e1e505863d4f17741a4b9ede73509e45bd6c6	Open original
Janady13/missionmatch / internal/platform/security/password.go	ai-intelligence-layer	5d5ddff70393a197c5f54a45280bb5dd42b24755	Open original
Janady13/missionmatch / internal/platform/security/password.go	graphrag-foundation	b0ddeb9f633fd138d09309d1a17b7d13bc3a67f7	Open original
Janady13/missionmatch / internal/platform/security/password.go	workstream-a-opportunity-intelligence	1675031db74316e100782d063e9eda1a597fe3a1	Open original
Janady13/missionmatch / internal/platform/security/password.go	deploy-and-ops	bdacd9d0b4d5998d25fc74bf4007f4c3ec538c7a	Open original
Janady13/missionmatch / internal/platform/security/password.go	ws9-bench-ingestion	f585a9ef32fa554663ce1fba9a414a54b6e49cf0	Open original
Janady13/missionmatch / internal/platform/security/password.go	ws2-alias-relationship	e4dada4601c6eb101830f9d223a9655dfa120616	Open original
Janady13/missionmatch / internal/platform/security/password.go	presentation-readiness	eb574acaa29d71ce4d0f852572e87c275c79fdb7	Open original
Janady13/missionmatch / internal/platform/security/password.go	vendor-intelligence	fe9796a19c261951d3f2565206c0c1b5ac294465	Open original
Janady13/missionmatch / internal/platform/security/password.go	workstream-b-screenmatch	09015496d565a172bcaa15cfe9a8e4b072b13df0	Open original
Janady13/missionmatch / internal/platform/security/password.go	ws7-federal-signal	6a9f6ce9cfb13345ffb47770d4960e7c2d9c17c2	Open original
Janady13/missionmatch / internal/platform/security/password.go	workstream-e-commercial-stubs	4437da660539284a400ee380b9b427a300c369ee	Open original
Janady13/missionmatch / internal/platform/security/password.go	ai-brain-live	aac32fc49c878cc5bca099459307611562d0bac1	Open original
Janady13/missionmatch / internal/platform/security/password.go	workstream-d-missionmatch	3be46ba89edb737182075a2b320509b42dc916f8	Open original
Janady13/missionmatch / internal/platform/security/password.go	phase2-connectors	e038d4c687aec16f8bd9bc4d907eea14d91f8704	Open original
Janady13/missionmatch / internal/platform/security/password.go	workstream-b-sam-contract-awards	d5101cceb98e70000cebb31d3e7ac73d747d3a6d	Open original
Janady13/missionmatch / internal/platform/security/password.go	w0-aedt-compliance	39df94f92b2a33f852481fe1954dabed841524bb	Open original
Janady13/missionmatch / internal/platform/security/password.go	feature/aioe-upgrade	2178e7298d0e5d9af83afa12402fd587f0ba6ed8	Open original
Janady13/missionmatch / internal/platform/security/password.go	capture-readiness	bae6af7cb2997e819174a9e9cfff5e16067a1975	Open original

Recovered source transcript

Download complete source text ↓135 lines · 4.8 KB

package security

import (
	"crypto/pbkdf2"
	"crypto/rand"
	"crypto/sha256"
	"crypto/subtle"
	"encoding/base64"
	"errors"
	"fmt"
	"strconv"
	"strings"
)

// Password policy and KDF constants.
//
// MaxPasswordLength caps the input at 64 characters. The CAVP tested envelope for this module is
// password length 8 to 64, so the cap keeps every hash inside the tested range. It also bounds the
// work a single request can force, which matters because PBKDF2 at a high iteration count is
// intentionally expensive.
//
// PBKDF2Iterations is 600000, the OWASP 2024 floor for PBKDF2 with HMAC SHA 256. SP 800-132 directs
// implementers to maximize the iteration count within tolerable latency, so this exceeds the CAVP
// tested ceiling of 10000 as a deliberate security choice. Document this when answering a FedRAMP
// assessor: the high count is stronger than, not a deviation from, the validated algorithm.
const (
	MaxPasswordLength = 64
	PBKDF2Iterations  = 600000
	pbkdf2KeyLength   = 32
	pbkdf2SaltLength  = 16
	pbkdf2Prefix      = "pbkdf2-sha256"
)

// ErrPasswordTooLong is returned by Hash when the input exceeds MaxPasswordLength. Verify never
// returns it; an over length input simply does not match.
var ErrPasswordTooLong = fmt.Errorf("security: password exceeds %d characters", MaxPasswordLength)

// ErrMalformedHash is returned when a stored encoded hash cannot be parsed.
var ErrMalformedHash = errors.New("security: malformed password hash")

// Hasher hashes and verifies passwords with PBKDF2 HMAC SHA 256 under the FIPS module, applying a
// versioned pepper first. It is pure logic: the only I/O is reading crypto/rand for the salt.
type Hasher struct {
	pepper *Pepper
	iters  int
}

// NewHasher returns a Hasher. Pass PBKDF2Iterations unless a test needs a cheaper cost.
func NewHasher(pepper *Pepper, iters int) (*Hasher, error) {
	if pepper == nil {
		return nil, errors.New("security: hasher needs a pepper")
	}
	if iters <= 0 {
		return nil, errors.New("security: hasher needs a positive iteration count")
	}
	return &Hasher{pepper: pepper, iters: iters}, nil
}

// Hash peppers and derives the password, returning the self describing encoded hash and the pepper
// version it was written with. The caller stores both (the encoded hash and the pepper version
// column).
func (h *Hasher) Hash(password string) (encoded string, pepperVersion int, err error) {
	if len(password) > MaxPasswordLength {
		return "", 0, ErrPasswordTooLong
	}
	version := h.pepper.ActiveVersion()
	peppered, err := h.pepper.Apply(version, password)
	if err != nil {
		return "", 0, err
	}
	salt := make([]byte, pbkdf2SaltLength)
	if _, err := rand.Read(salt); err != nil {
		return "", 0, fmt.Errorf("security: read salt: %w", err)
	}
	dk, err := pbkdf2.Key(sha256.New, string(peppered), salt, h.iters, pbkdf2KeyLength)
	if err != nil {
		return "", 0, fmt.Errorf("security: derive key: %w", err)
	}
	encoded = strings.Join([]string{
		pbkdf2Prefix,
		strconv.Itoa(h.iters),
		base64.RawStdEncoding.EncodeToString(salt),
		base64.RawStdEncoding.EncodeToString(dk),
	}, "$")
	return encoded, version, nil
}

// Verify reports whether password matches the stored encoded hash that was written with
// pepperVersion. needsRehash is true when the match succeeded but the stored parameters (iteration
// count or pepper version) are behind current policy, so the caller should transparently rehash on
// this successful login. The comparison is constant time.
func (h *Hasher) Verify(password, encoded string, pepperVersion int) (ok bool, needsRehash bool, err error) {
	iters, salt, dk, err := parsePBKDF2(encoded)
	if err != nil {
		return false, false, err
	}
	if len(password) > MaxPasswordLength {
		return false, false, nil
	}
	peppered, err := h.pepper.Apply(pepperVersion, password)
	if err != nil {
		return false, false, err
	}
	candidate, err := pbkdf2.Key(sha256.New, string(peppered), salt, iters, len(dk))
	if err != nil {
		return false, false, fmt.Errorf("security: derive key: %w", err)
	}
	if subtle.ConstantTimeCompare(candidate, dk) != 1 {
		return false, false, nil
	}
	needsRehash = iters != h.iters || pepperVersion != h.pepper.ActiveVersion()
	return true, needsRehash, nil
}

// parsePBKDF2 splits the encoded form pbkdf2-sha256$<iters>$<b64salt>$<b64dk>.
func parsePBKDF2(encoded string) (iters int, salt, dk []byte, err error) {
	parts := strings.Split(encoded, "$")
	if len(parts) != 4 || parts[0] != pbkdf2Prefix {
		return 0, nil, nil, ErrMalformedHash
	}
	iters, err = strconv.Atoi(parts[1])
	if err != nil || iters <= 0 {
		return 0, nil, nil, ErrMalformedHash
	}
	salt, err = base64.RawStdEncoding.DecodeString(parts[2])
	if err != nil || len(salt) == 0 {
		return 0, nil, nil, ErrMalformedHash
	}
	dk, err = base64.RawStdEncoding.DecodeString(parts[3])
	if err != nil || len(dk) == 0 {
		return 0, nil, nil, ErrMalformedHash
	}
	return iters, salt, dk, nil
}